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| COVID-19 research v1.90 | FLNA |
Sarah Leigh gene: FLNA was added gene: FLNA was added to COVID-19 research. Sources: Literature Mode of inheritance for gene: FLNA was set to Unknown Publications for gene: FLNA were set to DOI:10.3390/genes12111842 Review for gene: FLNA was set to AMBER Added comment: DOI: 10.3390/genes12111842 reports: Results based on DSC and SSC metrics demonstrated a different selective pressure on three genes (MUC5AC, ABCA7, FLNA) between Qatari and Italian populations. This study highlighted the genetic differences between Qatari and Italian populations and identified a subset of genes involved in innate immunity and host-pathogen interaction. Sources: Literature |
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| COVID-19 research v1.88 | ABCA7 |
Sarah Leigh gene: ABCA7 was added gene: ABCA7 was added to COVID-19 research. Sources: Literature Mode of inheritance for gene: ABCA7 was set to Unknown Publications for gene: ABCA7 were set to DOI:10.3390/genes12111842 Review for gene: ABCA7 was set to AMBER Added comment: DOI: 10.3390/genes12111842 reports: Results based on DSC and SSC metrics demonstrated a different selective pressure on three genes (MUC5AC, ABCA7, FLNA) between Qatari and Italian populations. This study highlighted the genetic differences between Qatari and Italian populations and identified a subset of genes involved in innate immunity and host-pathogen interaction. Sources: Literature |
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| COVID-19 research v1.87 | MUC5AC |
Sarah Leigh gene: MUC5AC was added gene: MUC5AC was added to COVID-19 research. Sources: Literature Mode of inheritance for gene: MUC5AC was set to Unknown Publications for gene: MUC5AC were set to 10.3390/genes12111842 Review for gene: MUC5AC was set to AMBER Added comment: DOI: 10.3390/genes12111842 reports: Results based on DSC and SSC metrics demonstrated a different selective pressure on three genes (MUC5AC, ABCA7, FLNA) between Qatari and Italian populations. This study highlighted the genetic differences between Qatari and Italian populations and identified a subset of genes involved in innate immunity and host-pathogen interaction. Sources: Literature |
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| COVID-19 research v1.58 | ABO | Eleanor Williams changed review comment from: Preprint https://doi.org/10.1101/2020.06.07.20124610.t Pourali et al 2020 - meta-analysis of blood group and risk of infect ion and death in COVID-19. Supports the finding that those with blood group A are at higher risk for COVID-19 infection while those with blood group O are at lower risk.; to: Preprint https://doi.org/10.1101/2020.06.07.20124610 Pourali et al 2020 - meta-analysis of blood group and risk of infect ion and death in COVID-19. Supports the finding that those with blood group A are at higher risk for COVID-19 infection while those with blood group O are at lower risk. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| COVID-19 research v1.52 | IFNG |
Sarah Leigh changed review comment from: IFNG was identified through an OMIM search for potential viral susceptibility genes. Initial triage by Illumina (Alison Coffey and team) was given a Tier 3 grouping (experimental evidence and association data consistent with viral susceptibility). "Illumina review: From OMIM: Interferon-gamma (IFNG), or type II interferon, is a cytokine critical for innate and adaptive immunity against viral and intracellular bacterial infections and for tumor control. The importance of IFNG in the immune system stems in part from its ability to inhibit viral replication directly, but most importantly derives from its immunostimulatory and immunomodulatory effects. IFNG is produced predominantly by natural killer (NK) and natural killer T (NKT) cells as part of the innate immune response, and by CD4 (186940) and CD8 (see 186910) cytotoxic T lymphocyte (CTL) effector T cells once antigen-specific immunity develops (PMID: 178981204; Schoenborn and Wilson, 2007). From OMIM: PMID: 17215375: Huang et al. (2007) The IFNG gene SNP, -764 C>G (rs2069707) in the proximal promoter region next to the binding motif for HSF1 , was significantly associated with sustained virologic response to IFNA therapy in a cohort of hepatitis C virus-positive patients compared to a cohorts who had spontaneously cleared HCV infection or who had chronic HCV infection. Luciferase reporter and EMSA analyses showed that the -764G allele had 2- to 3-fold higher promoter activity and stronger binding affinity for HSF1 than the -764C allele. Huang et al. (2007) concluded that the -764C-G SNP is functionally important in determining viral clearance and treatment response in HCV-infected patients. From OMIM PMID: 12854077: An et al. (2003) reported an association between a SNP in the IFNG promoter region, -173 G>T, and progression to AIDS. In individuals with the rare -179T allele, but not in those with the -179G allele, IFNG is inducible by TNF. An et al. (2003) studied 298 African American HIV-1 seroconverters and found that the -179T allele was associated with accelerated progression to a CD4 cell count below 200 and to AIDS. They noted that the SNP is present in 4% of African Americans and in only 0.02% of European Americans. PMID: 26458193 Wei et al. (2017) Eleven independent case-control studies were selected for the meta-analysis, comprising a total of 1527 HBV cases and 1467 healthy subjects. carriers of the IFN-γ A allele were more likely to develop HBV infection than those without in all five genetic models (all p < 0.05). According to the ethnicity-based sub-group analysis, a significant difference of the IFN-γ rs2430561 T > A (IFN-γ +874T/A) polymorphism was detected associated with the increased risk of HBV infection in Asians and European-derived populations in the majority of the groups. ; to: IFNG was identified through an OMIM search for potential viral susceptibility genes. Initial triage by Illumina (Alison Coffey and team) was given a Tier 3 grouping (experimental evidence and association data consistent with viral susceptibility). Illumina review: From OMIM: Interferon-gamma (IFNG), or type II interferon, is a cytokine critical for innate and adaptive immunity against viral and intracellular bacterial infections and for tumor control. The importance of IFNG in the immune system stems in part from its ability to inhibit viral replication directly, but most importantly derives from its immunostimulatory and immunomodulatory effects. IFNG is produced predominantly by natural killer (NK) and natural killer T (NKT) cells as part of the innate immune response, and by CD4 (186940) and CD8 (see 186910) cytotoxic T lymphocyte (CTL) effector T cells once antigen-specific immunity develops (PMID: 17981204; Schoenborn and Wilson, 2007). From OMIM: PMID: 17215375: Huang et al. (2007) The IFNG gene SNP, -764 C>G (rs2069707) in the proximal promoter region next to the binding motif for HSF1 , was significantly associated with sustained virologic response to IFNA therapy in a cohort of hepatitis C virus-positive patients compared to a cohorts who had spontaneously cleared HCV infection or who had chronic HCV infection. Luciferase reporter and EMSA analyses showed that the -764G allele had 2- to 3-fold higher promoter activity and stronger binding affinity for HSF1 than the -764C allele. Huang et al. (2007) concluded that the -764C-G SNP is functionally important in determining viral clearance and treatment response in HCV-infected patients. From OMIM PMID: 12854077: An et al. (2003) reported an association between a SNP in the IFNG promoter region, -173 G>T, and progression to AIDS. In individuals with the rare -179T allele, but not in those with the -179G allele, IFNG is inducible by TNF. An et al. (2003) studied 298 African American HIV-1 seroconverters and found that the -179T allele was associated with accelerated progression to a CD4 cell count below 200 and to AIDS. They noted that the SNP is present in 4% of African Americans and in only 0.02% of European Americans. PMID: 26458193 Wei et al. (2017) Eleven independent case-control studies were selected for the meta-analysis, comprising a total of 1527 HBV cases and 1467 healthy subjects. carriers of the IFN-γ A allele were more likely to develop HBV infection than those without in all five genetic models (all p < 0.05). According to the ethnicity-based sub-group analysis, a significant difference of the IFN-γ rs2430561 T > A (IFN-γ +874T/A) polymorphism was detected associated with the increased risk of HBV infection in Asians and European-derived populations in the majority of the groups. |
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| COVID-19 research v1.30 | IFNG |
Sarah Leigh changed review comment from: IFNG was identified through an OMIM search for potential viral susceptibility genes. Initial triage by Illumina (Alison Coffey and team) was given a Tier 3 grouping (experimental evidence and association data consistent with viral susceptibility); to: IFNG was identified through an OMIM search for potential viral susceptibility genes. Initial triage by Illumina (Alison Coffey and team) was given a Tier 3 grouping (experimental evidence and association data consistent with viral susceptibility). "Illumina review: From OMIM: Interferon-gamma (IFNG), or type II interferon, is a cytokine critical for innate and adaptive immunity against viral and intracellular bacterial infections and for tumor control. The importance of IFNG in the immune system stems in part from its ability to inhibit viral replication directly, but most importantly derives from its immunostimulatory and immunomodulatory effects. IFNG is produced predominantly by natural killer (NK) and natural killer T (NKT) cells as part of the innate immune response, and by CD4 (186940) and CD8 (see 186910) cytotoxic T lymphocyte (CTL) effector T cells once antigen-specific immunity develops (PMID: 178981204; Schoenborn and Wilson, 2007). From OMIM: PMID: 17215375: Huang et al. (2007) The IFNG gene SNP, -764 C>G (rs2069707) in the proximal promoter region next to the binding motif for HSF1 , was significantly associated with sustained virologic response to IFNA therapy in a cohort of hepatitis C virus-positive patients compared to a cohorts who had spontaneously cleared HCV infection or who had chronic HCV infection. Luciferase reporter and EMSA analyses showed that the -764G allele had 2- to 3-fold higher promoter activity and stronger binding affinity for HSF1 than the -764C allele. Huang et al. (2007) concluded that the -764C-G SNP is functionally important in determining viral clearance and treatment response in HCV-infected patients. From OMIM PMID: 12854077: An et al. (2003) reported an association between a SNP in the IFNG promoter region, -173 G>T, and progression to AIDS. In individuals with the rare -179T allele, but not in those with the -179G allele, IFNG is inducible by TNF. An et al. (2003) studied 298 African American HIV-1 seroconverters and found that the -179T allele was associated with accelerated progression to a CD4 cell count below 200 and to AIDS. They noted that the SNP is present in 4% of African Americans and in only 0.02% of European Americans. PMID: 26458193 Wei et al. (2017) Eleven independent case-control studies were selected for the meta-analysis, comprising a total of 1527 HBV cases and 1467 healthy subjects. carriers of the IFN-γ A allele were more likely to develop HBV infection than those without in all five genetic models (all p < 0.05). According to the ethnicity-based sub-group analysis, a significant difference of the IFN-γ rs2430561 T > A (IFN-γ +874T/A) polymorphism was detected associated with the increased risk of HBV infection in Asians and European-derived populations in the majority of the groups. |
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| COVID-19 research v1.29 | IFITM3 |
Sarah Leigh changed review comment from: IFITM3 was identified through an OMIM search for potential viral susceptibility genes. Initial triage by Illumina (Alison Coffey and team) was given a Tier 3 grouping (experimental evidence and association data consistent with viral susceptibility); to: IFITM3 was identified through an OMIM search for potential viral susceptibility genes. Initial triage by Illumina (Alison Coffey and team) was given a Tier 3 grouping (experimental evidence and association data consistent with viral susceptibility). Illumina review: PMID: 20064371 Brass et al. (2009) used a functional genomic screen to identify IFITM3 as an antiviral restriction factor in influenza A H1N1 viral infection. Further characterization showed IFITM3 inhibits the early replication of flaviviruses, including dengue virus and West Nile virus. PMID: 27384652 Gorman et al. (2016) Ifitm3(-/-) mice are more vulnerable to lethal WNV infection than their wildtype littermates, this was associated with greater virus accumulation in peripheral organs and central nervous system tissues. PMID: 22446628 Everitt et al. (2012). Ifitm3(-/-) mice display fulminant viral pneumonia when challenged with a normally low-pathogenicity influenza virus, a phenotype which may be rescued by the re-introduction of Ifitm3. PMID: 22446628 Everitt et al. (2012). A statistically significant number of hospitalized with seasonal or pandemic influenza H1N1/09 viruses subjects show enrichment for a minor IFITM3 allele (SNP rs12252-C). This SNP alters a splice acceptor site, and functional assays show the minor CC genotype IFITM3 has reduced influenza virus restriction in vitro. PMID: 23361009 Zhang et al. (2013) In a Han Chinese patient population, the rs12252-C, CC genotype was found in 69% of Chinese patients with severe pandemic influenza A H1N1/09 virus infection compared with 25% in those with mild infection. The CC genotype was estimated to confer a sixfold greater risk for severe infection than the CT and TT genotypes. PMID: 25942469 Yang et al. (2015) performed meta-analysis of four studies consisting of 445 cases and 4180 controls. A significant association between a minor IFITM3 allele (SNP rs12252-C) with severe influenza susceptibility, but not in mild influenza subjects, in both UK Caucasians and Han Chinese population was confirmed. The rs12252-C allele causes a 23.7% higher chance of infection and also constitutes a risk factor for more severe influenza. |
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| COVID-19 research v1.27 | HLA-DQB1 |
Sarah Leigh changed review comment from: HLA-DQB1 was identified through an OMIM search for potential viral susceptibility genes. Initial triage by Illumina (Alison Coffey and team) was given a Tier 3 grouping (experimental evidence and association data consistent with viral susceptibility); to: HLA-DQB1 was identified through an OMIM search for potential viral susceptibility genes. Initial triage by Illumina (Alison Coffey and team) was given a Tier 3 grouping (experimental evidence and association data consistent with viral susceptibility). Illumina review: HLA-DQB1 alleles may have a role in influencing viral infection and pathogenesis: PMID:10609818: Thirsz et al. (1999) - The distribution of MHC class II alleles was compared between patients with self-limiting infection (n=85) and matched patients with persistent infection (n=170); between patients with mild (n=321) and severe (n=321) histological injury; and between patients who responded to interferon (n=96) and those who did not (n=192). The results of these comparisons were confirmed with a second-stage study of self-limiting infection (n=52) versus persistent infection (n=152). Self-limiting HCV infection was associated with HLA-DRB1*1101 (odds ratio 2.14 [95% CI 1.11-4.12]; p=0.013) and HLA-DQB1*0301 (2.22 [1.24-3.96], p=0.004). Persistent HCV infection was associated with HLA-DRB1*0701 (2.04 [1.03-4.17], p=0.027), and HLA-DRB4*0101 (2.38 [1.29-4.35], p=0.002). These results were confirmed in the second-stage study. No significant associations were found between MHC class II alleles and severe histological injury or response to interferon therapy. PMID:30563535 - Ou et al. (2019) - found that HLA-DQB1*06:03 protected against HBV infection. Levels of IFN-γ and IL-4 were significantly elevated in HBV cases with HLA-DQB1*06:05 (vs. HLA-DQB1*05:03), and the HBV group had higher DQB1 mRNA expression than the healthy control group with HLA-DQB1*05:03 and HLA-DQB1*06:02. The meta-analysis revealed that HLA-DQB1*04:01, HLA-DQB1*05:02, HLA-DQB1*05:03, and HLA-DQB1*06:01 were risk factors for HBV infection susceptibility, while HLA-DQB1*05:01, HLA-DQB1*06:03, and HLA-DQB1*06:04 protected against HBV infection. Spontaneous HBV clearance was associated withHLA-DQB1*06:04, while chronic HBV infection was associated with HLA-DQB1*02:01 and HLA-DQB105:02. DBQ1 typing can be used to identify patients who have elevated risks of HBV infection. PMID 31254396: Huang et al. (2019) - Recently reported a high prevalence and spontaneous clearance rate of HCV in a cohort of Chinese Li ethnicity who were infected with new variants of HCV genotype 6. In this study found that the distribution of HLA class I and class II alleles in HCV infected individuals of Chinese Li ethnicity (n = 143) was distinct from that of Chinese Han ethnicity. HLA-DRB1*11:01 and DQB1*03:01 were more prevalent in Chinese Li subjects who cleared HCV spontaneously than those who were chronically infected (P = .036 and P = .024, respectively), which were consistent with the previous report regarding the Chinese Han population. Multivariate logistic regression analysis showed that DQB1*03:01 (odds ratio = 3.899, P = .017), but not DRB1*11:01, associated with HCV spontaneous clearance, independent of age, sex, and IFNL3 genotype. Because DQB1*03:01 and DRB1*11:01 were tightly linked because of linkage disequilibrium, results clearly supported the associations of these two alleles with HCV spontaneous clearance in Chinese Li as well as Han ethnicity. PMID:23710940 - Chaaithanya et al. (2013) - study investigated the association of polymorphisms in the human leucocyte antigen class II genes with susceptibility or protection against CHIKV. Lower frequency of HLA-DQB1*03:03 was observed in CHIKV patients compared with the control population. Significantly lower frequency of glutamic acid at position 86 of peptide-binding pocket 1 coding HLA-DQB1 genotypes was observed in CHIKV patients compared with healthy controls. HLA-DQB1 alleles and critical amino acid differences in the peptide-binding pockets of HLA-DQB1 alleles might have role in influencing infection and pathogenesis of CHIKV. |
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| COVID-19 research v1.23 | DPP4 |
Sarah Leigh changed review comment from: DPP4 was identified through an OMIM search for potential viral susceptibility genes. Initial triage by Illumina (Alison Coffey and team) was given a Tier 2 grouping (experimental and/or genetic evidence, suggesting a biological role linking to corona viruses, may not be a GDA); to: DPP4 was identified through an OMIM search for potential viral susceptibility genes. Initial triage by Illumina (Alison Coffey and team) was given a Tier 2 grouping (experimental and/or genetic evidence, suggesting a biological role linking to corona viruses, may not be a GDA). "Illumina review: Cell surface glycoprotein receptor involved in the costimulatory signal essential for T-cell receptor (TCR)-mediated T-cell activation. DPP4 acts as a receptor for MERS-CoV - PMID: 24554656 - Barlan et al. (2014). MERS virus cell entry begins with the receptor-binding domains (RBDs) of the MERS-CoV protein virus spike (S) protein binding to blades 4 and 5 of the 8-blade propeller domain of DPP4. PMID:23486063 - Raj et al. (2013) - identified DPP4 as a functional receptor for hCoV-EMS (MERS CoV). Evidence from mouse models of involvment in susceptibility to MERS-CoV infection. PMID:24599590 - Zhao et al. (2014) - noted that rodents are not susceptible to MERS-CoV. They used an adenovirus vector expressing human DPP4 to generate mice sensitized to infection with MERS-CoV. These mice developed pneumonia characterized by extensive inflammatory cell infiltration with virus clearance after 6 to 8 days in a type I IFN- and T cell-dependent manner. Treatment with poly(I:C) was also efficacious in this model. PMID: 25589660 - Agrawal et al. (2015) developed a transgenic mouse model expressing human DPP4 that was susceptible to MERS-CoV infection, with high titers of virus detectable in brain and lung and later in other organs. PMID: 26124093 - Pascal et al. (2015) - obtained a mouse model susceptible to intranasal infection with MERS-CoV. Human monoclonal antibodies binding to the MERS-CoV S protein neutralized all variants of the virus and prevented entry into target cells. The antibodies could both prevent and treat mice humanized for DPP4. Pascal et al. (2015) concluded that the model will be valuable for assessing treatments for MERS-CoV infection and disease. PMID:31883094 - Leist et al. (2020) - generated a mouse model susceptible to MERS-CoV infection - used C57BL/6J mice and CRISPR/Cas9 to substitute human residues at positions 288 and 330 (A288L and T330R). Strollo et al. (2020) and Bassedine et al. (2020) suggested that DPP4 could affect severity of infection and also be a therapeutic target: PMID:32336077 - Strollo et al. (2020) - propose a role for DDP4 as a functional receptor for SARS-CoV-2 and ask the question if DPP4 is directly involved in SARS-CoV-2 cell adhesion/virulence, and whether DPP4 inhibition might be a therapeutic strategy for preventing infection. PMID:32394639 - Bassedine et al. (2020) - modeling of the structure of SARS-CoV-2 spike glycoprotein predicts that it can interact with human DPP4 in addition to ACE2. Notes that increased DPP4 expression and activity are associated with diabetes, obesity, and metabolic syndrome, all of which have been reported to influence COVID‐19 severity. DPP4 inhibitors (gliptins), which vary in their interactions with the active site of the enzyme, may have immunomodulatory and cardioprotective effects that could be beneficial in COVID‐19 cases. PMID:31964246 - Keline-Weber at al. (2020) - Identified 14 polymorphisms in DPP4 from public databases that alter amino acid residus required for MERS-CoV S binding. Introduction of the respective variants into DPP4 revealed that all except one (Δ346-348) were compatible with robust DPP4 expression. Four polymorphisms (K267E, K267N, A291P and Δ346-348) strongly reduced binding of MERS-CoV S to DPP4 and S protein-driven host cell entry, as determined using soluble S protein and S protein bearing rhabdoviral vectors, respectively. Two polymorphisms (K267E and A291P) were analyzed in the context of authentic MERS-CoV and were found to attenuate viral replication. Collectively, we identified naturally-occurring polymorphisms in DPP4 that negatively impact cellular entry of MERS-CoV and might thus modulate MERS development in infected patients. |
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| COVID-19 research v0.348 | NPC1 |
Rebecca Foulger commented on gene: NPC1: Evidence Summary from Illumina curation team (Alison Coffey and Julie Taylor): NPC1 encodes a polytopic protein that resides in the limiting membrane of late endosomes and lysosomes (LE/LY) and mediates distribution of lipoprotein-derived cholesterol in cells (Cote et al. (2011). NPC1 expression is critical for filovirus infection (EboV and MarV) and the mechanism of infection is not dependent on NPC1 cholesterol transport activity (Carette et al. 2011). Structural studies demonstrate that the C-domain of NPC1 binds to the primed EBOV glycoprotein (Wang et al. 2016; Gong et al. 2016). PMID 21866103: Carette et al. (2011) Genome-wide haploid genetic screen was performed in primary fibroblasts derived from human Niemann-Pick type C1 disease patients to identify host factors required for Filovirus infection. These cells are resistant to infection by EboV and MarV but remain fully susceptible to other unrelated viruses (Figure 2A, B). Resistance of NPC1-deficient cells was not caused by cholesterol transport defects (Fig S8). Infection in these cells was restored by expression of wild type NPC1 (Figure 2C). Similar results were observed in NPC1-null Chinese hamster ovary (CHO) cells, with loss of NPC1 conferring complete resistance to viral infection (Figure S6D) that was reversed by expression of human NPC1 (Figure S6E). Electron micrographs of NPC1 mutant cells infected with rVSV-GP-EboV indicate that NPC1 is required in downstream process in filovirus entry leading to viral membrane fusion and escape from the lysosomal compartment. Knockdown of NPC1 in HUVEC diminished infection by filoviruses (Figure 4D and S18) suggesting that NPC1 is critical for authentic filovirus infection. Furthermore, NPC1+/+ mice rapidly succumb to infection with either filovirus while NPC1−/+ mice were largely protected (Figure 4E). PMID 2186610: Cote et al. (2011) HeLa cells treated with benzylpiperazine adamantane diamide-derived compounds (3.0 and 3.47) developed cytoplasmic vacuoles indicating that that they target one or more proteins involved in regulation of cholesterol uptake in cells. CHO cells lacking NPC1 were completely resistant to infection by this virus and infection of these cells was fully restored when NPC1 was expressed. NPC1 expression but not NPC1-dependent cholesterol transport activity is essential for EboV infection (Fig 2c). 3.0-derived compounds inhibit EboV infection by interfering with binding of cleaved glycoprotein to NPC1 (Fig 4). PMID 26771495: Wang et al. (2016) The crystal structure of the primed glycoprotein (GPcl) of Ebola virus and domain C of NPC1 (NPC1-C) demonstrates that the NPC1-C binds to the primed EBOV GP (Fig 1, 3). Further, it suggests that a membrane-fusion-priming conformational change occurs in GPcl or the binding of GPcl, and this is a unique feature for all the filoviruses. NPC1-interacting compound 3.47 competitively blocks the primed GP binding to the membrane probably binds to the two protruding loops of NPC1-C. Compound U18666A binds to a different site on NPC1 causing endosomal calcium depletion. Furthermore, peptide inhibitors or small molecules, which can easily penetrate the cell membrane and reach the primed GP in the late endosomes could also act as potential therapeutic agents. PMID 27238017: Gong et al. (2016) Full-length human NPC1 and a low-resolution reconstruction of NPC1 in complex with the cleaved glycoprotein (GPcl) of EBOV was determined by single-particle electron cryomicroscopy. NPC1 contains 13 transmembrane segments (TMs) and three lumenal domains, A (NTD), C, and I. TMs 2–13 exhibit a typical resistance-nodulation-cell division fold, among which TMs 3–7 constitute the sterol-sensing domain conserved in several proteins involved in cholesterol metabolism and signaling. EBOV-GPcl binds to NPC1 through the domain C. |
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| COVID-19 research v0.348 | MIR155 |
Rebecca Foulger commented on gene: MIR155: Evidence Summary from Illumina curation team (Alison Coffey and Julie Taylor): MIR155 (also referred to as BIC) is an endogenous noncoding RNA involved in regulation of the immune response, in particular T-cell differentiation, and in regulation of innate immunity (PMID: 32233818; 217121651;1746328969;20852130). This miRNA has been associated with various virus infections (PMID: 32233818;28139244;23686237;26072128). miR-155-5p expression has been shown to be induced in mice infected with influenza A virus (PMID: 32308197 - in this study, lung injury by ARDS was attenuated by deletion of miR-155, making this miRNA a potential therapeutic target in the context of COVID-19). Through single cell and bulk RNA profiling of SARS-CoV-2 and SARS-CoV infections in three human cell lines (H1299, Caco-2 and Calu-3 cells), Emanuel et al. (2020) (bioRxiv preprint doi: https://doi.org/10.1101/2020.05.05.079194) demonstrated strong expression of the immunity and inflammation-associated microRNA miRNA-155 upon viral infection with both viruses. Both viruses triggered a 16-fold upregulation of one form of miR-155 and a 3-fold upregulation of another. A role for MIR155 in viral susceptibility for a range of viruses and the immune response has also been demonstrated in a series of mouse models: PMID 23601686: In Mir155 -/- mice, Dudda et al. (2013) observed severely reduced accumulation of Cd8-positive T cells during acute and chronic viral infections with impaired control of viral replication. Lack of Mir155 led to an accumulation of Socs1 resulting in defective cytokine signaling through Stat5. Dudda et al. also concluded that MIR155 and its target, SOCS1, are key regulators of CD8-positive T cells. PMID 23275599: Lind et al. (2013) found that mice lacking Mir155 had impaired Cd8 positive T-cell responses to infections with lymphocytic choriomeningitis virus and the intracellular bacteria Listeria monocytogenes and concluded that MIR155 is required for acute CD8-positive T-cell responses and proposed that targeting MIR155 may be useful in modulating immune responses. PMID 24516198: Bhela et al. (2014) – 75 to 80% of MIR155 null mice infected ocularly with herpes simplex virus (HSV)-1 developed herpes simplex encephalitis with elevated viral titers in brain, but not in cornea. Immunohistochemical and flow cytometric analyses in Mir155-null mice showed diminished Cd8-positive T-cell numbers, functionality, and homing capacity. Adoptive transfer of HSV-1-immune Cd8-positive T cells to Mir155-null mice 24 hours after infection provided protection from HSE. The authors concluded that MIR155 deficiency results in enhanced susceptibility of the nervous system to HSV-1 infection. |
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| COVID-19 research v0.348 | IRF2 |
Rebecca Foulger commented on gene: IRF2: Evidence Summary from Illumina curation team (Alison Coffey and Julie Taylor): IRF2 encodes interferon regulatory factor 2, a member of the family of transcription factors that play a role in regulating both the innate and adaptive immune response. IRF2 is an antiviral IFN-stimulated gene (ISG) which negatively regulates IFN signalling. (Lukele et al. 2019 -review). In both cell culture and the knock out Irf2-/- mouse model, Irf2 deficiency leads to an increase in susceptibility to viral infection (Schoggins et al. 2011; Karki et al. 2012; Matsuyama et al. 1993; Grieder et al. 1999). Irf2-/- mice also show increased susceptibility to neurotrophic viruses, including SINV and VSV, when compared to wild type mice. The compromised development and maturation of multiple immune cell types in the Irf2−/− mice which lead to reduced B cells and virus specific IgG levels in the brains of infected mice was linked to the pathogenic phenotype (Melody et al. 2016). These data suggest IRF2 may also play an important role in the development of the immune system. PMID: 21478870 Schoggins et al. (2011) - The authors over expressed over 380 ISGs to test their ability to inhibit the replication of viruses including hepatitis C virus (HCV), yellow fever virus (YFV), West Nile virus (WNV), chikungunya virus (CHIKV), Venezuelan equine encephalitis virus (VEEV), and human immunodeficiency virus (HIV-1). Each gene was expressed in a lentiviral construct transfected into various cell lines. Cells were challenged with GFP expressing virus and replication was quantified by flow cytometry. IRF2 was shown to be a anti-HCV ISGs. PMID: 22615998 Karki et al. (2012) - Karki et al. used a library of lentiviruses individually expressing more than 350 ISGs, transduced in HuH-7 cells in the presence of absence of ZAP and identified IRF2 as an enhancer of viral inhibition upon infection with SINV. In confirmatory experiments, when both ZAP and IRF2 were knocked down, viral replication was significantly increased compared to ZAP or IRF2 silencing alone, which supports the results obtained in the ISG overexpression screen and suggests that endogenous ZAP and IRF2 might interact in a synergistic manner (Fig. 5). PMID: 10208925 Grieder et al. (1999) - Irf2−/− mice show increased susceptibility to virulent Venezuelan equine encephalitis (VEE) virus infection even after vaccination with attenuated VEE, suggesting IRF2 is required to mount a protective immune response (Grieder and Vogel, 1999) PMID: 22113474 Gao et al. (2012) - The authors found IRF2 variants to be risk alleles for atopic dermatitis and eczema herpeticum. Eight SNPs were found to be significantly associated with reduced IFN-γ production after stimulation with herpes simplex virus. In the cohort, none of the SNPs showed association with HSV positivity. PMID: 27899441 Melody et al. (2016) - Fig 1. Lrf2 mice show lethality upon peritoneal infection with either SINV or VSV virus (Fig 1) Irf2−/− and WT mice were challenged i.p. with SVN, a neurovirulent but noninvasive strain, which normally replicates only in the periphery without lethality in mice. Approximately 70% of the Irf2−/− mice succumbed to infection with SVN, whereas all of the WT littermate control mice survived (Fig. 1 A), indicating that IRF2 deficiency confers lethal neuroinvasive properties on the normally noninvasive SVN strain. Infection with VSV led to survival of all the WT mice, whereas ∼60% of the Irf2−/− mice suffered from paralysis and succumbed to infection. Staining using Evans blue showed that the integrity of the blood brain barrier is maintained during the infection(fig 2). The survival of lrf-/- mice treated with IFNAR-1 blocking antibody at 2dpi was similar to treatment with a control antibody, suggesting that peripheral elevation of type I IFN signalling is not responsible for the susceptibility (fig 3). Development and maturation of multiple immune cell subsets are compromised in Irf2−/− mice at baseline and upon SVN infection. B cells and virus-specific IgG level are significantly reduced in Irf2 -/- mouse brains, periorbital injection of naïve Bcells from WT mice 1day before infection did not affect lethality in the lrf2-/1 mice. |
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| COVID-19 research v0.348 | DICER1 |
Rebecca Foulger changed review comment from: Evidence Summary from Illumina curation team: The DICER1 gene, located on chromosome 14, position q32.13, was discovered in 2001 by Bernstein and is a member of the RNase III family, (also known as dicer 1, ribonuclease III; dicer1, Dcr-1 homolog (Drosophila); multinodular goitre 1). DICER1 is involved in the generation of double-stranded microRNAs (miRNAs), short non-coding RNAs, the cleavage of dsRNA into siRNAs, along with the biogenesis of numerous other small RNAs. There is increasing evidence DICER1 is also involved in regulating many other essential cellular processes such as those related to chromatin remodeling, inflammation, apoptosis and cell survival (Kurzynska-Kokorniak et al. 2015; Song and Rossi, 2017). DICER1 encodes a ∼220-KDa protein (RNase III endoribonuclease) which is a crucial component of the RNA Induced Silencing Complex (RISC) loading complex (RLC), comprised of dicer, Argonaute-2 (AGO-2), and trans-activation-responsive RNA binding protein 2 (TARBP2). The encoded protein is required by the RNA interference (RNAi) and small temporal RNA (stRNA) pathways to produce the active small RNA component which has a role in modulating gene expression at the post-transcriptional level. Research has shown that expression levels of cellular transcript and protein dicer are strictly controlled, with aberrant regulation contributing to carcinogenesis, neurodegenerative, rheumatic and immune system disorders. Studies have concluded that the encoded dicer ribonuclease-dependent processing of dsRNA viral replication intermediates into successive siRNAs is a conserved mammalian immune response to infection by positive-strand RNA viruses (Svobodova et al. 2016 summary & fig1; Li et al. 2013; Ding et al. 2018). Moreover, miRNAs play an important role in host-virus interactions in mammals (See Maillard et al. 2019 REVIEW; Foulkes et al. 2014 REVIEW). IMMUNE SYSTEM The cre-lox method for dicer1 gene knockout has been employed for studies into the role of dicer1 in immune cell development and function. Studies of dicer1 fl/fl mice have indicated short survival times along with severely impaired GMP differentiation into monocytes, neutrophils, myeloid DCs & mature macrophages. (Devasthanam et al. 2014). Results conclude that dicer1 is important in immune response and also vital for cell survival and apoptosis pathways. Muljo et al. (2005) investigated a conditional allele of dicer-1 (dcr-1) within a mouse model and showed that specific dcr-1 deletion in the T-cell lineage, resulted in impaired development of T-cells & aberrant cell differentiation of T-helper cells & cytokine production. Dcr-1 deletion in the thymus resulted in severe block in development of CD8+ T cells and resulted in defective microRNA processing in CD4+ T-cells. The results demonstrate Dicer regulates diverse aspects of T-cell biology along with cytokine production during T-cell differentiation where dicer-deficient T-cells preferentially express interferon-ƴ. VIRUSES Research by Galiana-Arnoux et al. (2006), of DICER in drosophila (drosophila have two dicer genes) have identified that DICER genes (Dcr1, miRNA pathway and Dcr2, RNAi pathway) control production of siRNA and a loss-of-function mutation in Dcr2 resulted in increased susceptibility to three different families of RNA viruses. Qi et al. (2012) research into RNAi gene silencing mechanism show that the B2 protein in Wuhan nodavirus (WhNV) suppresses Dcr2 in drosophila by direct interaction with the PAZ and RNAse III domains therefore blocking processing of dsRNA and siRNA. Evidence of a dicer antiviral system was also reported by Machitani et al. (2016) for mammalian human adenoviruses where DICER1 gene knockdown increased the copy number of adenovirus-encoding small RNAs (VA-RNAs) leading to the promotion of adenovirus replication; conversely, dicer overexpression significantly inhibited viral replication. Modai et al. (2019) conclude that HIV-1 infection inhibits DICER1 by altering miRNA expression. They conclude that upon HIV-1 infection, human miR-186, 210 and 222 directly regulate DICER1 gene expression causing down-regulation of the gene contributing to impaired cell-mediated immunity (fig6). Other methods of inhibition are from viral proteins, termed viral suppressors of RNA silencing, which interact and inhibit dicer ribonuclease activity in HIV-1 and hepatitis C infections. These viral proteins may mediate proteasomal degradation of endoribonuclease dicer through CRL4DCAF1 ubiquitin ligase complex (Klockow et al. 2013), interact directly via the core protein (Chen et al. 2008) or HIV-1 transactivation of transcription (Bennasser and Jeang, 2006). Through these methods they can block dicer interactions with TRBP2 or ADAR1, boost macrophage infection, and subsequently reduce the function of short hairpin RNAs (shRNAs) which thus inhibit RNA silencing. Ultimately these viruses, though various methods, supress the ability of dicer to process dsRNAs into siRNAs boosting viral infection and pathogenesis. Downregulation of DICER1 gene expression has additionally been found in cord blood of infants with severe respiratory syncytial virus (RSV), prior to RSV exposure, indicating this reduced expression may predispose newborns to RSV disease. Inchley et al. (2011) theorize that this occurs via disruption of leukocyte gene regulation of miRNA and direct anti-viral RNAi mechanisms. (Inchley et al. 2011 see section on “Dicer Gene Expression”). Otsuka et al. (2007) have shown using gene-trap methods to obtain viable dicer1 fl/fl mice where dicer1 deficiency caused impairment of miR24 and miR93 production resulting in susceptibility to vesticular stomatitis virus (VSV) and herpes simplex-1 virus, but not other viruses tested. SARS CoV & SARS CoV-2 Recently, Pasquier and Robichon, 2020 (preprint) have investigated the Dicer host immunity system regarding SARs-CoV-2 within a computational approach, concluding SARS-CoV2 may manipulate this system of immunity against its host, requiring further research. Mu et al., 2020 suggest SARs-CoV2 suppresses RNAi thus preventing recognition by the encoded ribonuclease dicer protein Viral suppressors of RNA silencing (VSRs) suppress RNAi at pre or post-dicer level to overcome host defense and establish infection. Cui et al. (2015) from Wuhan University laboratory of virology, identified a novel VSR from coronaviruses (CoVs) including Severe acute respiratory syndrome coronavirus (SARS-CoV) and showed that the coronavirus nucelocaspid protein (N-protein), conserved and expressed in all coronaviruses, suppressed RNAi triggered by either short hairpin RNAs or small interfering RNAs in mammalian cells. They went on to show using mouse hepatitis virus A-59 (MHV-A59) which is closely linked to SARS-CoV in the family coronaviridae, that the viral replication was increased when the N proteins (novel VSR) were expressed but that knockdown of DICER1 gene or Ago2 transcripts facilitated the viral replication specifically in mammalian cells. They demonstrate that the N-protein of CoVs could efficiently inhibit dicer-mediated dsRNA cleavage and post-Dicer activities by sequestering dsRNAs and siRNAs. Kannan et al. (2020) performed clustal W analysis of N-Protein for SARS-CoV and COVID-19 demonstrating 90% sequence identity from an NCBI amino acid blast of both nucleocapsid (N) protein sequences (figure2). They suggest that the N-protein of COVID-19 may also function as a VSR for RNAi to overcome host defense. Ding et al. (2017) show that both MHV and SARS-CoV N proteins can also disrupt protein activator of protein kinase R (PACT), a cellular dsRNA-binding protein which binds to RIG-I and MDA5 to activate interferon (IFN) production to prevent antiviral host response. Literature Review PMID: 17181864: Bennasser and Jeang, 2006 • HIV-1 Tat Interaction With Dicer: Requirement for RNA • Tat-Dicer interaction depends on RNA, requires the helicase domain of Dicer, and is independent of Tat's transactivation domain. PMID: 18325616: Chen et al., 2008 • HCV Core Protein Interacts With Dicer to Antagonize RNA Silencing PMID: 26085159: Cui et al., 2015 • The Nucleocapsid Protein of Coronaviruses Acts as a Viral Suppressor of RNA Silencing in Mammalian Cells PMID: 24303839: Devasthanam et al, 2014 • This study investigates the role of the dicer protein in immune cell development and function using dicer1 cre-lox knockout models to conditionally ablate dicer1 in different immune cell subsets. PMID: 28591694: Ding et al., 2017 • The nucleocapsid proteins of mouse hepatitis virus and severe acute respiratory syndrome coronavirus share the same IFN-β antagonizing mechanism: attenuation of PACT-mediated RIG-I/MDA5 activation PMID: 30015086: Ding et al., 2018 • Antiviral RNA Interference in Mammals: Indicates infection of plants and insects with RNA and DNA viruses triggers Dicer-dependent production of virus-derived small interfering RNAs (vsiRNAs), which subsequently guide specific virus clearance by RNA interference (RNAi). PMID: 25176334: Foulkes et al., 2012-REVIEW • Review of DICER1: DICER1 Mutations, microRNAs and Mechanisms PMID: 16554838: Galiana-Arnoux et al., 2006 • Essential function in vivo for Dicer-2 in host defense against RNA viruses in drosophila. • https://pubmed.ncbi.nlm.nih.gov/16554838/ or https://www.nature.com/articles/ni1335 PMID: 21385408: Inchley et al., 2011 • Investigates ribonuclease Dicer and analyzed the gene expression of Dicer in newborns of which 37 infants had sufficient cord blood RNA with confirmed RSV disease <1yr. Demonstrates significant reduced Dicer expression in cord blood prior to severe disease in infants <1yr later. Conclude downregulation may predispose infants to RSV disease. PMID: 32141569: Kannan et al., 2020 • COVID-19 (Novel Coronavirus 2019) - Recent Trends • Perform W cluster analysis of COVID-19 and SARS-CoV nucleocapsid (N) protein sequences of the viruses showing 90% amino acid sequence similarity. Suggest the N-protein may be a VSR in RNAi by targeting DICER. PMID: 23849790: Klockow et al., 2013 • The HIV-1 Protein Vpr Targets the Endoribonuclease Dicer for Proteasomal Degradation to Boost Macrophage Infection PMID: 25883138: Kurzynska-Kokorniak et al., 2015 • Investigating the complexity of the mechanisms regulating Dicer gene expression and enzyme activities PMID: 24115437: Li et al, 2013 • Investigates RNA interference pathways in antiviral immunity in mammals overviewing dicer processing of dsRNA viral replication intermediates into siRNAs. PMID: 27273616: Machitani et al., 2016 • Dicer functions as an antiviral system against human adenoviruses via cleavage of adenovirus-encoded noncoding RNA PMID: 30872283: Maillard et al., 2019- REVIEW • Reviewing DICER1 within the anti-viral RNAi pathway in mammals PMID: 30682089: Modai et al, 2019 • HIV-1 infection increases miRNAs which inhibit Dicer PMID: 32291557: Mu et al, 2020 • SARS-CoV-2-encoded nucleocapsid protein acts as a viral suppressor of RNA interference in cells PMID: 16009718: Muljo et al., 2005 • Indicates absence of dicer results in abberant T-cell differentiation. PMID: 17613256: Otsuka, et al 2007 • Hypersusceptibility to Vesicular Stomatitis Virus Infection in Dicer1-Deficient Mice Is Due to Impaired miR24 and miR93 Expression No PMID: Preprint : Pasquier and Rubichon, 2020 • SARS-CoV-2 might manipulate against its host the immunity RNAi/Dicer/Ago system PMID: 22438534: Qi et al., 2012 • Targeting of Dicer-2 and RNA by a Viral RNA Silencing Suppressor in Drosophila Cells PMID: 28473628: Song and Rossi, 2017 • Molecular Mechanisms of Dicer: Endonuclease and Enzymatic Activity; to: Evidence Summary from Illumina curation team (Alison Coffey and Julie Taylor): The DICER1 gene, located on chromosome 14, position q32.13, was discovered in 2001 by Bernstein and is a member of the RNase III family, (also known as dicer 1, ribonuclease III; dicer1, Dcr-1 homolog (Drosophila); multinodular goitre 1). DICER1 is involved in the generation of double-stranded microRNAs (miRNAs), short non-coding RNAs, the cleavage of dsRNA into siRNAs, along with the biogenesis of numerous other small RNAs. There is increasing evidence DICER1 is also involved in regulating many other essential cellular processes such as those related to chromatin remodeling, inflammation, apoptosis and cell survival (Kurzynska-Kokorniak et al. 2015; Song and Rossi, 2017). DICER1 encodes a ∼220-KDa protein (RNase III endoribonuclease) which is a crucial component of the RNA Induced Silencing Complex (RISC) loading complex (RLC), comprised of dicer, Argonaute-2 (AGO-2), and trans-activation-responsive RNA binding protein 2 (TARBP2). The encoded protein is required by the RNA interference (RNAi) and small temporal RNA (stRNA) pathways to produce the active small RNA component which has a role in modulating gene expression at the post-transcriptional level. Research has shown that expression levels of cellular transcript and protein dicer are strictly controlled, with aberrant regulation contributing to carcinogenesis, neurodegenerative, rheumatic and immune system disorders. Studies have concluded that the encoded dicer ribonuclease-dependent processing of dsRNA viral replication intermediates into successive siRNAs is a conserved mammalian immune response to infection by positive-strand RNA viruses (Svobodova et al. 2016 summary & fig1; Li et al. 2013; Ding et al. 2018). Moreover, miRNAs play an important role in host-virus interactions in mammals (See Maillard et al. 2019 REVIEW; Foulkes et al. 2014 REVIEW). IMMUNE SYSTEM The cre-lox method for dicer1 gene knockout has been employed for studies into the role of dicer1 in immune cell development and function. Studies of dicer1 fl/fl mice have indicated short survival times along with severely impaired GMP differentiation into monocytes, neutrophils, myeloid DCs & mature macrophages. (Devasthanam et al. 2014). Results conclude that dicer1 is important in immune response and also vital for cell survival and apoptosis pathways. Muljo et al. (2005) investigated a conditional allele of dicer-1 (dcr-1) within a mouse model and showed that specific dcr-1 deletion in the T-cell lineage, resulted in impaired development of T-cells & aberrant cell differentiation of T-helper cells & cytokine production. Dcr-1 deletion in the thymus resulted in severe block in development of CD8+ T cells and resulted in defective microRNA processing in CD4+ T-cells. The results demonstrate Dicer regulates diverse aspects of T-cell biology along with cytokine production during T-cell differentiation where dicer-deficient T-cells preferentially express interferon-ƴ. VIRUSES Research by Galiana-Arnoux et al. (2006), of DICER in drosophila (drosophila have two dicer genes) have identified that DICER genes (Dcr1, miRNA pathway and Dcr2, RNAi pathway) control production of siRNA and a loss-of-function mutation in Dcr2 resulted in increased susceptibility to three different families of RNA viruses. Qi et al. (2012) research into RNAi gene silencing mechanism show that the B2 protein in Wuhan nodavirus (WhNV) suppresses Dcr2 in drosophila by direct interaction with the PAZ and RNAse III domains therefore blocking processing of dsRNA and siRNA. Evidence of a dicer antiviral system was also reported by Machitani et al. (2016) for mammalian human adenoviruses where DICER1 gene knockdown increased the copy number of adenovirus-encoding small RNAs (VA-RNAs) leading to the promotion of adenovirus replication; conversely, dicer overexpression significantly inhibited viral replication. Modai et al. (2019) conclude that HIV-1 infection inhibits DICER1 by altering miRNA expression. They conclude that upon HIV-1 infection, human miR-186, 210 and 222 directly regulate DICER1 gene expression causing down-regulation of the gene contributing to impaired cell-mediated immunity (fig6). Other methods of inhibition are from viral proteins, termed viral suppressors of RNA silencing, which interact and inhibit dicer ribonuclease activity in HIV-1 and hepatitis C infections. These viral proteins may mediate proteasomal degradation of endoribonuclease dicer through CRL4DCAF1 ubiquitin ligase complex (Klockow et al. 2013), interact directly via the core protein (Chen et al. 2008) or HIV-1 transactivation of transcription (Bennasser and Jeang, 2006). Through these methods they can block dicer interactions with TRBP2 or ADAR1, boost macrophage infection, and subsequently reduce the function of short hairpin RNAs (shRNAs) which thus inhibit RNA silencing. Ultimately these viruses, though various methods, supress the ability of dicer to process dsRNAs into siRNAs boosting viral infection and pathogenesis. Downregulation of DICER1 gene expression has additionally been found in cord blood of infants with severe respiratory syncytial virus (RSV), prior to RSV exposure, indicating this reduced expression may predispose newborns to RSV disease. Inchley et al. (2011) theorize that this occurs via disruption of leukocyte gene regulation of miRNA and direct anti-viral RNAi mechanisms. (Inchley et al. 2011 see section on “Dicer Gene Expression”). Otsuka et al. (2007) have shown using gene-trap methods to obtain viable dicer1 fl/fl mice where dicer1 deficiency caused impairment of miR24 and miR93 production resulting in susceptibility to vesticular stomatitis virus (VSV) and herpes simplex-1 virus, but not other viruses tested. SARS CoV & SARS CoV-2 Recently, Pasquier and Robichon, 2020 (preprint) have investigated the Dicer host immunity system regarding SARs-CoV-2 within a computational approach, concluding SARS-CoV2 may manipulate this system of immunity against its host, requiring further research. Mu et al., 2020 suggest SARs-CoV2 suppresses RNAi thus preventing recognition by the encoded ribonuclease dicer protein Viral suppressors of RNA silencing (VSRs) suppress RNAi at pre or post-dicer level to overcome host defense and establish infection. Cui et al. (2015) from Wuhan University laboratory of virology, identified a novel VSR from coronaviruses (CoVs) including Severe acute respiratory syndrome coronavirus (SARS-CoV) and showed that the coronavirus nucelocaspid protein (N-protein), conserved and expressed in all coronaviruses, suppressed RNAi triggered by either short hairpin RNAs or small interfering RNAs in mammalian cells. They went on to show using mouse hepatitis virus A-59 (MHV-A59) which is closely linked to SARS-CoV in the family coronaviridae, that the viral replication was increased when the N proteins (novel VSR) were expressed but that knockdown of DICER1 gene or Ago2 transcripts facilitated the viral replication specifically in mammalian cells. They demonstrate that the N-protein of CoVs could efficiently inhibit dicer-mediated dsRNA cleavage and post-Dicer activities by sequestering dsRNAs and siRNAs. Kannan et al. (2020) performed clustal W analysis of N-Protein for SARS-CoV and COVID-19 demonstrating 90% sequence identity from an NCBI amino acid blast of both nucleocapsid (N) protein sequences (figure2). They suggest that the N-protein of COVID-19 may also function as a VSR for RNAi to overcome host defense. Ding et al. (2017) show that both MHV and SARS-CoV N proteins can also disrupt protein activator of protein kinase R (PACT), a cellular dsRNA-binding protein which binds to RIG-I and MDA5 to activate interferon (IFN) production to prevent antiviral host response. Literature Review PMID: 17181864: Bennasser and Jeang, 2006 • HIV-1 Tat Interaction With Dicer: Requirement for RNA • Tat-Dicer interaction depends on RNA, requires the helicase domain of Dicer, and is independent of Tat's transactivation domain. PMID: 18325616: Chen et al., 2008 • HCV Core Protein Interacts With Dicer to Antagonize RNA Silencing PMID: 26085159: Cui et al., 2015 • The Nucleocapsid Protein of Coronaviruses Acts as a Viral Suppressor of RNA Silencing in Mammalian Cells PMID: 24303839: Devasthanam et al, 2014 • This study investigates the role of the dicer protein in immune cell development and function using dicer1 cre-lox knockout models to conditionally ablate dicer1 in different immune cell subsets. PMID: 28591694: Ding et al., 2017 • The nucleocapsid proteins of mouse hepatitis virus and severe acute respiratory syndrome coronavirus share the same IFN-β antagonizing mechanism: attenuation of PACT-mediated RIG-I/MDA5 activation PMID: 30015086: Ding et al., 2018 • Antiviral RNA Interference in Mammals: Indicates infection of plants and insects with RNA and DNA viruses triggers Dicer-dependent production of virus-derived small interfering RNAs (vsiRNAs), which subsequently guide specific virus clearance by RNA interference (RNAi). PMID: 25176334: Foulkes et al., 2012-REVIEW • Review of DICER1: DICER1 Mutations, microRNAs and Mechanisms PMID: 16554838: Galiana-Arnoux et al., 2006 • Essential function in vivo for Dicer-2 in host defense against RNA viruses in drosophila. • https://pubmed.ncbi.nlm.nih.gov/16554838/ or https://www.nature.com/articles/ni1335 PMID: 21385408: Inchley et al., 2011 • Investigates ribonuclease Dicer and analyzed the gene expression of Dicer in newborns of which 37 infants had sufficient cord blood RNA with confirmed RSV disease <1yr. Demonstrates significant reduced Dicer expression in cord blood prior to severe disease in infants <1yr later. Conclude downregulation may predispose infants to RSV disease. PMID: 32141569: Kannan et al., 2020 • COVID-19 (Novel Coronavirus 2019) - Recent Trends • Perform W cluster analysis of COVID-19 and SARS-CoV nucleocapsid (N) protein sequences of the viruses showing 90% amino acid sequence similarity. Suggest the N-protein may be a VSR in RNAi by targeting DICER. PMID: 23849790: Klockow et al., 2013 • The HIV-1 Protein Vpr Targets the Endoribonuclease Dicer for Proteasomal Degradation to Boost Macrophage Infection PMID: 25883138: Kurzynska-Kokorniak et al., 2015 • Investigating the complexity of the mechanisms regulating Dicer gene expression and enzyme activities PMID: 24115437: Li et al, 2013 • Investigates RNA interference pathways in antiviral immunity in mammals overviewing dicer processing of dsRNA viral replication intermediates into siRNAs. PMID: 27273616: Machitani et al., 2016 • Dicer functions as an antiviral system against human adenoviruses via cleavage of adenovirus-encoded noncoding RNA PMID: 30872283: Maillard et al., 2019- REVIEW • Reviewing DICER1 within the anti-viral RNAi pathway in mammals PMID: 30682089: Modai et al, 2019 • HIV-1 infection increases miRNAs which inhibit Dicer PMID: 32291557: Mu et al, 2020 • SARS-CoV-2-encoded nucleocapsid protein acts as a viral suppressor of RNA interference in cells PMID: 16009718: Muljo et al., 2005 • Indicates absence of dicer results in abberant T-cell differentiation. PMID: 17613256: Otsuka, et al 2007 • Hypersusceptibility to Vesicular Stomatitis Virus Infection in Dicer1-Deficient Mice Is Due to Impaired miR24 and miR93 Expression No PMID: Preprint : Pasquier and Rubichon, 2020 • SARS-CoV-2 might manipulate against its host the immunity RNAi/Dicer/Ago system PMID: 22438534: Qi et al., 2012 • Targeting of Dicer-2 and RNA by a Viral RNA Silencing Suppressor in Drosophila Cells PMID: 28473628: Song and Rossi, 2017 • Molecular Mechanisms of Dicer: Endonuclease and Enzymatic Activity |
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| COVID-19 research v0.348 | DICER1 |
Rebecca Foulger commented on gene: DICER1: Evidence Summary from Illumina curation team: The DICER1 gene, located on chromosome 14, position q32.13, was discovered in 2001 by Bernstein and is a member of the RNase III family, (also known as dicer 1, ribonuclease III; dicer1, Dcr-1 homolog (Drosophila); multinodular goitre 1). DICER1 is involved in the generation of double-stranded microRNAs (miRNAs), short non-coding RNAs, the cleavage of dsRNA into siRNAs, along with the biogenesis of numerous other small RNAs. There is increasing evidence DICER1 is also involved in regulating many other essential cellular processes such as those related to chromatin remodeling, inflammation, apoptosis and cell survival (Kurzynska-Kokorniak et al. 2015; Song and Rossi, 2017). DICER1 encodes a ∼220-KDa protein (RNase III endoribonuclease) which is a crucial component of the RNA Induced Silencing Complex (RISC) loading complex (RLC), comprised of dicer, Argonaute-2 (AGO-2), and trans-activation-responsive RNA binding protein 2 (TARBP2). The encoded protein is required by the RNA interference (RNAi) and small temporal RNA (stRNA) pathways to produce the active small RNA component which has a role in modulating gene expression at the post-transcriptional level. Research has shown that expression levels of cellular transcript and protein dicer are strictly controlled, with aberrant regulation contributing to carcinogenesis, neurodegenerative, rheumatic and immune system disorders. Studies have concluded that the encoded dicer ribonuclease-dependent processing of dsRNA viral replication intermediates into successive siRNAs is a conserved mammalian immune response to infection by positive-strand RNA viruses (Svobodova et al. 2016 summary & fig1; Li et al. 2013; Ding et al. 2018). Moreover, miRNAs play an important role in host-virus interactions in mammals (See Maillard et al. 2019 REVIEW; Foulkes et al. 2014 REVIEW). IMMUNE SYSTEM The cre-lox method for dicer1 gene knockout has been employed for studies into the role of dicer1 in immune cell development and function. Studies of dicer1 fl/fl mice have indicated short survival times along with severely impaired GMP differentiation into monocytes, neutrophils, myeloid DCs & mature macrophages. (Devasthanam et al. 2014). Results conclude that dicer1 is important in immune response and also vital for cell survival and apoptosis pathways. Muljo et al. (2005) investigated a conditional allele of dicer-1 (dcr-1) within a mouse model and showed that specific dcr-1 deletion in the T-cell lineage, resulted in impaired development of T-cells & aberrant cell differentiation of T-helper cells & cytokine production. Dcr-1 deletion in the thymus resulted in severe block in development of CD8+ T cells and resulted in defective microRNA processing in CD4+ T-cells. The results demonstrate Dicer regulates diverse aspects of T-cell biology along with cytokine production during T-cell differentiation where dicer-deficient T-cells preferentially express interferon-ƴ. VIRUSES Research by Galiana-Arnoux et al. (2006), of DICER in drosophila (drosophila have two dicer genes) have identified that DICER genes (Dcr1, miRNA pathway and Dcr2, RNAi pathway) control production of siRNA and a loss-of-function mutation in Dcr2 resulted in increased susceptibility to three different families of RNA viruses. Qi et al. (2012) research into RNAi gene silencing mechanism show that the B2 protein in Wuhan nodavirus (WhNV) suppresses Dcr2 in drosophila by direct interaction with the PAZ and RNAse III domains therefore blocking processing of dsRNA and siRNA. Evidence of a dicer antiviral system was also reported by Machitani et al. (2016) for mammalian human adenoviruses where DICER1 gene knockdown increased the copy number of adenovirus-encoding small RNAs (VA-RNAs) leading to the promotion of adenovirus replication; conversely, dicer overexpression significantly inhibited viral replication. Modai et al. (2019) conclude that HIV-1 infection inhibits DICER1 by altering miRNA expression. They conclude that upon HIV-1 infection, human miR-186, 210 and 222 directly regulate DICER1 gene expression causing down-regulation of the gene contributing to impaired cell-mediated immunity (fig6). Other methods of inhibition are from viral proteins, termed viral suppressors of RNA silencing, which interact and inhibit dicer ribonuclease activity in HIV-1 and hepatitis C infections. These viral proteins may mediate proteasomal degradation of endoribonuclease dicer through CRL4DCAF1 ubiquitin ligase complex (Klockow et al. 2013), interact directly via the core protein (Chen et al. 2008) or HIV-1 transactivation of transcription (Bennasser and Jeang, 2006). Through these methods they can block dicer interactions with TRBP2 or ADAR1, boost macrophage infection, and subsequently reduce the function of short hairpin RNAs (shRNAs) which thus inhibit RNA silencing. Ultimately these viruses, though various methods, supress the ability of dicer to process dsRNAs into siRNAs boosting viral infection and pathogenesis. Downregulation of DICER1 gene expression has additionally been found in cord blood of infants with severe respiratory syncytial virus (RSV), prior to RSV exposure, indicating this reduced expression may predispose newborns to RSV disease. Inchley et al. (2011) theorize that this occurs via disruption of leukocyte gene regulation of miRNA and direct anti-viral RNAi mechanisms. (Inchley et al. 2011 see section on “Dicer Gene Expression”). Otsuka et al. (2007) have shown using gene-trap methods to obtain viable dicer1 fl/fl mice where dicer1 deficiency caused impairment of miR24 and miR93 production resulting in susceptibility to vesticular stomatitis virus (VSV) and herpes simplex-1 virus, but not other viruses tested. SARS CoV & SARS CoV-2 Recently, Pasquier and Robichon, 2020 (preprint) have investigated the Dicer host immunity system regarding SARs-CoV-2 within a computational approach, concluding SARS-CoV2 may manipulate this system of immunity against its host, requiring further research. Mu et al., 2020 suggest SARs-CoV2 suppresses RNAi thus preventing recognition by the encoded ribonuclease dicer protein Viral suppressors of RNA silencing (VSRs) suppress RNAi at pre or post-dicer level to overcome host defense and establish infection. Cui et al. (2015) from Wuhan University laboratory of virology, identified a novel VSR from coronaviruses (CoVs) including Severe acute respiratory syndrome coronavirus (SARS-CoV) and showed that the coronavirus nucelocaspid protein (N-protein), conserved and expressed in all coronaviruses, suppressed RNAi triggered by either short hairpin RNAs or small interfering RNAs in mammalian cells. They went on to show using mouse hepatitis virus A-59 (MHV-A59) which is closely linked to SARS-CoV in the family coronaviridae, that the viral replication was increased when the N proteins (novel VSR) were expressed but that knockdown of DICER1 gene or Ago2 transcripts facilitated the viral replication specifically in mammalian cells. They demonstrate that the N-protein of CoVs could efficiently inhibit dicer-mediated dsRNA cleavage and post-Dicer activities by sequestering dsRNAs and siRNAs. Kannan et al. (2020) performed clustal W analysis of N-Protein for SARS-CoV and COVID-19 demonstrating 90% sequence identity from an NCBI amino acid blast of both nucleocapsid (N) protein sequences (figure2). They suggest that the N-protein of COVID-19 may also function as a VSR for RNAi to overcome host defense. Ding et al. (2017) show that both MHV and SARS-CoV N proteins can also disrupt protein activator of protein kinase R (PACT), a cellular dsRNA-binding protein which binds to RIG-I and MDA5 to activate interferon (IFN) production to prevent antiviral host response. Literature Review PMID: 17181864: Bennasser and Jeang, 2006 • HIV-1 Tat Interaction With Dicer: Requirement for RNA • Tat-Dicer interaction depends on RNA, requires the helicase domain of Dicer, and is independent of Tat's transactivation domain. PMID: 18325616: Chen et al., 2008 • HCV Core Protein Interacts With Dicer to Antagonize RNA Silencing PMID: 26085159: Cui et al., 2015 • The Nucleocapsid Protein of Coronaviruses Acts as a Viral Suppressor of RNA Silencing in Mammalian Cells PMID: 24303839: Devasthanam et al, 2014 • This study investigates the role of the dicer protein in immune cell development and function using dicer1 cre-lox knockout models to conditionally ablate dicer1 in different immune cell subsets. PMID: 28591694: Ding et al., 2017 • The nucleocapsid proteins of mouse hepatitis virus and severe acute respiratory syndrome coronavirus share the same IFN-β antagonizing mechanism: attenuation of PACT-mediated RIG-I/MDA5 activation PMID: 30015086: Ding et al., 2018 • Antiviral RNA Interference in Mammals: Indicates infection of plants and insects with RNA and DNA viruses triggers Dicer-dependent production of virus-derived small interfering RNAs (vsiRNAs), which subsequently guide specific virus clearance by RNA interference (RNAi). PMID: 25176334: Foulkes et al., 2012-REVIEW • Review of DICER1: DICER1 Mutations, microRNAs and Mechanisms PMID: 16554838: Galiana-Arnoux et al., 2006 • Essential function in vivo for Dicer-2 in host defense against RNA viruses in drosophila. • https://pubmed.ncbi.nlm.nih.gov/16554838/ or https://www.nature.com/articles/ni1335 PMID: 21385408: Inchley et al., 2011 • Investigates ribonuclease Dicer and analyzed the gene expression of Dicer in newborns of which 37 infants had sufficient cord blood RNA with confirmed RSV disease <1yr. Demonstrates significant reduced Dicer expression in cord blood prior to severe disease in infants <1yr later. Conclude downregulation may predispose infants to RSV disease. PMID: 32141569: Kannan et al., 2020 • COVID-19 (Novel Coronavirus 2019) - Recent Trends • Perform W cluster analysis of COVID-19 and SARS-CoV nucleocapsid (N) protein sequences of the viruses showing 90% amino acid sequence similarity. Suggest the N-protein may be a VSR in RNAi by targeting DICER. PMID: 23849790: Klockow et al., 2013 • The HIV-1 Protein Vpr Targets the Endoribonuclease Dicer for Proteasomal Degradation to Boost Macrophage Infection PMID: 25883138: Kurzynska-Kokorniak et al., 2015 • Investigating the complexity of the mechanisms regulating Dicer gene expression and enzyme activities PMID: 24115437: Li et al, 2013 • Investigates RNA interference pathways in antiviral immunity in mammals overviewing dicer processing of dsRNA viral replication intermediates into siRNAs. PMID: 27273616: Machitani et al., 2016 • Dicer functions as an antiviral system against human adenoviruses via cleavage of adenovirus-encoded noncoding RNA PMID: 30872283: Maillard et al., 2019- REVIEW • Reviewing DICER1 within the anti-viral RNAi pathway in mammals PMID: 30682089: Modai et al, 2019 • HIV-1 infection increases miRNAs which inhibit Dicer PMID: 32291557: Mu et al, 2020 • SARS-CoV-2-encoded nucleocapsid protein acts as a viral suppressor of RNA interference in cells PMID: 16009718: Muljo et al., 2005 • Indicates absence of dicer results in abberant T-cell differentiation. PMID: 17613256: Otsuka, et al 2007 • Hypersusceptibility to Vesicular Stomatitis Virus Infection in Dicer1-Deficient Mice Is Due to Impaired miR24 and miR93 Expression No PMID: Preprint : Pasquier and Rubichon, 2020 • SARS-CoV-2 might manipulate against its host the immunity RNAi/Dicer/Ago system PMID: 22438534: Qi et al., 2012 • Targeting of Dicer-2 and RNA by a Viral RNA Silencing Suppressor in Drosophila Cells PMID: 28473628: Song and Rossi, 2017 • Molecular Mechanisms of Dicer: Endonuclease and Enzymatic Activity |
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| COVID-19 research v0.347 | IDE | Alison Coffey commented on gene: IDE: Evidence Summary from Illumina curation team: Insulin-degrading enzyme (IDE), also known as insulysin, is a member of the zinc metalloproteinase family that was initially implicated in insulin degradation. It is highly conserved among different species and has the ability to interact with a variety of functionally unrelated ligands that share little homology in their primary amino acid sequences. Several human viruses use enzymes as receptors. Li et al. (2006) (PMID 17055432) established IDE as a cellular receptor for both cell-free and cell-associated Varicella-zoster virus (VZV), the cause of chickenpox and shingles in humans. VZV is likely spread as cell-free virus to susceptible hosts but transmitted by cell-to-cell spread in the body and in vitro. Li et al. (2006) showed that IDE interacts with the VZV glycoprotein E (gE) (which is essential for virus infection) through its extracellular domain. Downregulation of IDE by siRNA, or blocking of IDE with antibody, with soluble IDE protein extracted from liver, or with bacitracin inhibited VZV infection. Cell-to-cell spread of virus was also impaired by blocking IDE. Transfection of cell lines impaired for VZV infection with a plasmid expressing human IDE resulted in increased entry and enhanced infection with cell-free and cell-associated virus. Li et al. (2010) subsequently reported that a recombinant soluble IDE (rIDE) enhanced VZV infectivity at an early step of infection associated with an increase in virus internalization, and increased cell-to-cell spread. In 2017, Hahn et al. demonstrated that mature HIV-1 p6 protein (stability of which inversely affects the replication capacity of HIV-1) is a substrate for IDE. IDE is both sufficient and required for the degradation of p6, which is approximately 100-fold more efficiently degraded by IDE than its eponymous substrate insulin. An IDE specific inhibitor, 6bK, and exogenous insulin, were both shown to interfere with X4-tropic HIV-1 replication in activated PBMCs, most probably by competing with p6 for degradation by IDE. In addition, an IDE-insensitive p6 mutant of HIV-1 exhibits impaired replication capacity but is insensitive to treatment with insulin or 6bK. Conversely, neither virus release and maturation, nor the amounts of particle associated Vpr and p6 itself were altered in IDE knock out cells. The data support a model in which IDE is responsible for the rapid degradation of p6 entering the cell as part of the incoming virion, a process that appears to be crucial to achieve optimal X4-tropic virus replication. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| COVID-19 research v0.347 | BANF1 | Alison Coffey commented on gene: BANF1: Evidence Summary from Illumina curation team: BANF1 is an abundant, highly conserved DNA binding protein involved in multiple pathways including mitosis, nuclear assembly, viral infection, chromatin and gene regulation and the DNA damage response. It is also essential for early development in metazoans and relevant to human physiology. Variants in the gene are associated with Nestor-Guillermo progeria syndrome (OMIM #614008). Different viral infections can lead to changes in the subcellular distribution of BANF1 infections with a B1 kinase-deficient vaccinia virus cause re-localization at sites of viral DNA accumulation in the cytoplasm, while no change in localization is found during infection with wild-type vaccinia. By contrast, in cells infected with Herpes Simplex Virus Type-1 (HSV-1) BAF localizes to the nucleus, where HSV-1 viral DNA replicates. BANF1 actively protects the genome by intercepting foreign DNA. This protective function is exploited by retroviruses for inhibiting self-destructing autointegration of retroviral DNA, thereby promoting integration of viral DNA into the host chromosome. However, with other viruses, including the poxvirus vaccinia and HSV-1, BANF1 has an antiviral activity by blocking viral DNA replication (PMID 2607214: Jamin et al. 2015). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| COVID-19 research v0.324 | SIGIRR |
Catherine Snow changed review comment from: Curation by Illumina clinical curators contributing to Covid-19 effort. Curation on all OMIM genes which hit the term "virus". Currently no gene disease association for SIGIRR. Molgora et al. (2017) reported that IL-1R8 serves as a checkpoint for natural killer (NK) cell maturation and effector function. Its genetic blockade unleashes NK cell-mediated resistance to hepatic carcinogenesis, hematogenous liver and lung metastasis, and cytomegalovirus infection Sources: Expert list; to: Curation by Illumina clinical curators contributing to Covid-19 effort. Curation on all OMIM genes which hit the term "virus". Currently no gene disease association for SIGIRR. Molgora et al. (2017) reported that IL-1R8 serves as a checkpoint for natural killer (NK) cell maturation and effector function. Its genetic blockade unleashes NK cell-mediated resistance to hepatic carcinogenesis, hematogenous liver and lung metastasis, and cytomegalovirus infection Li et al. (2019) who worked with mice. Found that stabilization of Sigirr by USP13 describes a novel anti-inflammatory pathway in diseases that could provide a new strategy to modulate immune activation. Sources: Expert list |
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| COVID-19 research v0.323 | SIGIRR |
Catherine Snow gene: SIGIRR was added gene: SIGIRR was added to COVID-19 research. Sources: Expert list Mode of inheritance for gene: SIGIRR was set to Unknown Publications for gene: SIGIRR were set to 29072292 Review for gene: SIGIRR was set to RED Added comment: Curation by Illumina clinical curators contributing to Covid-19 effort. Curation on all OMIM genes which hit the term "virus". Currently no gene disease association for SIGIRR. Molgora et al. (2017) reported that IL-1R8 serves as a checkpoint for natural killer (NK) cell maturation and effector function. Its genetic blockade unleashes NK cell-mediated resistance to hepatic carcinogenesis, hematogenous liver and lung metastasis, and cytomegalovirus infection Sources: Expert list |
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| COVID-19 research v0.320 | SLC2A1 |
Ivone Leong gene: SLC2A1 was added gene: SLC2A1 was added to COVID-19 research. Sources: Expert list Mode of inheritance for gene: SLC2A1 was set to Unknown Publications for gene: SLC2A1 were set to 15767416; 22308487 Review for gene: SLC2A1 was set to AMBER Added comment: GLUT1 is a receptor for HTLV and suggested that perturbations in glucose metabolism resulting from interactions of HTLV envelope glycoproteins with GLUT1 are likely to contribute to HTLV-associated disorders (PMID: 15767416). PMID: 22308487 shows that IL-7 induced upregulation of Glut1 changes glucos uptake and causes T lymphocyptes susceptible to HIV-1 infection. Sources: Expert list |
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| COVID-19 research v0.303 | TMPRSS4 |
Eleanor Williams gene: TMPRSS4 was added gene: TMPRSS4 was added to COVID-19 research. Sources: Literature Mode of inheritance for gene: TMPRSS4 was set to Unknown Publications for gene: TMPRSS4 were set to https://doi.org/10.1101/2020.05.12.091314 Added comment: Preprint: Wruck and Adjaye https://doi.org/10.1101/2020.05.12.091314 - describe a meta-analysis focussing on the transcriptome data from human lung epithelial cells including samples infected with SARS-CoV-2 from a study described by Blanco Melo et al.12. The exploration was directed to co-expression with the known CoV-2 receptor ACE2. 72 genes significantly co-expressed with ACE2. Of the transmembrane serine proteases, the most significantly coexpressed with ACE2 was TMPRSS4, suggesting it to be a putative druggable target. Pathway analysis revealed papilloma virus infection amongst the most significantly correlated pathways. Sources: Literature |
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| COVID-19 research v0.298 | ACE2 | Eleanor Williams commented on gene: ACE2: Preprint: https://doi.org/10.1101/2020.05.12.20098160 - Shovlin and Vizcaychip - variants in 213,158 exomes/genomes were integrated for ACE2 . ACMG/AMP-based pathogenicity criteria were applied. Modelling the ″COVID-resistant ″ state where pathogenic alleles would be beneficial, nine null alleles met PVS1. Thirty-seven variants met PM1 based on critical location +/-PP3 based on computational modelling. Modelling a ″COVID-susceptible ″ state, 31 variants in four upstream open reading frames and 5′ untranslated regions could meet PM1, and may have differential effects if aminoglycoside antibiotics were prescribed for pneumonia and sepsis. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| COVID-19 research v0.264 | KHDRBS1 | Rebecca Foulger commented on gene: KHDRBS1: Notes from Julie Taylor and Alison Coffey (Illumina): KHDRBS1 belongs to the evolutionarily conserved signal transduction activator of RNA (STAR) family of RNA-binding proteins. These proteins play key roles during cell differentiation and development (summary by Bianchi et al., 2010). Cote et al. (2003, PMID:12529443) noted that KHDRBS1 (SAM68) can export unspliced human immunodeficiency virus (HIV) RNAs, and they found that treatment of cells with methylase inhibitors prevented the ability of KHDRBS1 (SAM68) to export unspliced HIV RNAs from transfected COS-7 cells. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| COVID-19 research v0.176 | MET | Sarah Leigh reviewed gene: MET: Rating: RED; Mode of pathogenicity: ; Publications: 9927037; Phenotypes: Hepatocellular carcinoma, childhood type, somatic 114550; Mode of inheritance: Unknown | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| COVID-19 research v0.176 | CYP2B6 | Sarah Leigh reviewed gene: CYP2B6: Rating: RED; Mode of pathogenicity: ; Publications: 15622315, 20860463, 15194512, 23418033; Phenotypes: {Efavirenz central nervous system toxicity, susceptibility to} 614546, Efavirenz, poor metabolism of 614546; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| COVID-19 research v0.121 | MET |
Sarah Leigh gene: MET was added gene: MET was added to Viral susceptibility. Sources: OMIM Mode of inheritance for gene: MET was set to |
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| COVID-19 research v0.81 | POLR3A |
Abdelazeem Elhabyan changed review comment from: This gene is responsible for A subunit of Polymerase which sense DNA in viral infection eg Varicella Zoster. SARS-CoV-2 is an RNA virus. Inborn errors in RNA polymerase III underlie severe varicella zoster virus infections(PMID: 28783042) We report 4 cases of acute severe VZV infection affecting the central nervous system or the lungs in unrelated, otherwise healthy children who are heterozygous for rare missense mutations in POLR3A (one patient), POLR3C (one patient), or both (two patients). POLR3A and POLR3C encode subunits of RNA polymerase III. Leukocytes from all 4 patients tested exhibited poor IFN induction in response to synthetic or VZV-derived DNA. Moreover, leukocytes from 3 of the patients displayed defective IFN production upon VZV infection and reduced control of VZV replication. These phenotypes were rescued by transduction with relevant WT alleles. This work demonstrates that monogenic or digenic POLR3A and POLR3C deficiencies confer increased susceptibility to severe VZV disease in otherwise healthy children, providing evidence for an essential role of a DNA sensor in human immunity Different classes of PRRs are involved in recognition of virus infections, including membrane-associated TLRs; cytosolic retinoic acid–inducible gene 1–like (RIG-I–like) receptors, which sense RNA; and DNA sensors (24). Each of these classes of PRRs stimulates production of IFNs, which exhibit antiviral activity through their ability to induce IFN-stimulated genes (ISGs). With respect to DNA sensors, TLR9 detects unmethylated DNA, RNA polymerase III (POL III) recognizes AT-rich DNA, while gamma-interferon-inducible protein 16 (IFI16) and cyclic GMP-AMP synthase (cGAS) sense double-stranded DNA in a sequence-independent manner (25–29). Mutations in RNA Polymerase III genes and defective DNA sensing in adults with varicella-zoster virus CNS infection PMID: 29728610 Recently, deficiency in the cytosolic DNA sensor RNA Polymerase III was described in children with severe primary varicella-zoster virus (VZV) infection in the CNS and lungs. In the present study we examined adult patients with VZV CNS infection caused by viral reactivation. By whole exome sequencing we identified mutations in POL III genes in two of eight patients. These mutations were located in the coding regions of the subunits POLR3A and POLR3E. In functional assays, we found impaired expression of antiviral and inflammatory cytokines in response to the POL III agonist Poly(dA:dT) as well as increased viral replication in patient cells compared to controls. Altogether, this study provides significant extension on the current knowledge on susceptibility to VZV infection by demonstrating mutations in POL III genes associated with impaired immunological sensing of AT-rich DNA in adult patients with VZV CNS infection.; to: This gene is responsible for A subunit of Polymerase which senses DNA viruses especially AT-rich regions eg Varicella Zoster. SARS-CoV-2 is an RNA virus. Inborn errors in RNA polymerase III underlie severe varicella zoster virus infections(PMID: 28783042) We report 4 cases of acute severe VZV infection affecting the central nervous system or the lungs in unrelated, otherwise healthy children who are heterozygous for rare missense mutations in POLR3A (one patient), POLR3C (one patient), or both (two patients). POLR3A and POLR3C encode subunits of RNA polymerase III. Leukocytes from all 4 patients tested exhibited poor IFN induction in response to synthetic or VZV-derived DNA. Moreover, leukocytes from 3 of the patients displayed defective IFN production upon VZV infection and reduced control of VZV replication. These phenotypes were rescued by transduction with relevant WT alleles. This work demonstrates that monogenic or digenic POLR3A and POLR3C deficiencies confer increased susceptibility to severe VZV disease in otherwise healthy children, providing evidence for an essential role of a DNA sensor in human immunity Different classes of PRRs are involved in recognition of virus infections, including membrane-associated TLRs; cytosolic retinoic acid–inducible gene 1–like (RIG-I–like) receptors, which sense RNA; and DNA sensors (24). Each of these classes of PRRs stimulates production of IFNs, which exhibit antiviral activity through their ability to induce IFN-stimulated genes (ISGs). With respect to DNA sensors, TLR9 detects unmethylated DNA, RNA polymerase III (POL III) recognizes AT-rich DNA, while gamma-interferon-inducible protein 16 (IFI16) and cyclic GMP-AMP synthase (cGAS) sense double-stranded DNA in a sequence-independent manner (25–29). Mutations in RNA Polymerase III genes and defective DNA sensing in adults with varicella-zoster virus CNS infection PMID: 29728610 Recently, deficiency in the cytosolic DNA sensor RNA Polymerase III was described in children with severe primary varicella-zoster virus (VZV) infection in the CNS and lungs. In the present study we examined adult patients with VZV CNS infection caused by viral reactivation. By whole exome sequencing we identified mutations in POL III genes in two of eight patients. These mutations were located in the coding regions of the subunits POLR3A and POLR3E. In functional assays, we found impaired expression of antiviral and inflammatory cytokines in response to the POL III agonist Poly(dA:dT) as well as increased viral replication in patient cells compared to controls. Altogether, this study provides significant extension on the current knowledge on susceptibility to VZV infection by demonstrating mutations in POL III genes associated with impaired immunological sensing of AT-rich DNA in adult patients with VZV CNS infection. |
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| COVID-19 research v0.51 | IFNAR1 |
Sarah Leigh Added comment: Comment on publications: PMID 31270247: reports three variants in two cases of healthy children with adverse reactions to live attuated virus vaccines. Each had biallelic loss-of-function IFNAR1 variations and the effects of these was demonstrated by the patient-derived fibroblasts being susceptible to viruses. This effect was recused by the WT IFNAR1. PMID 26676772: reports the tageted degradation of IFNAR1 protein by Influenza A virus (IAV), allowing the virus to escape the powerful innate immune system. Thus the loss of function of IFNAR1 would increase the susceptability to viral infection. PMID 20020050: reports the tageted degradation of IFNAR1 protein by Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV). Confocal microscopic analysis showed increased translocation of IFNAR1 into the lysosomal compartment and flow cytometry showed reduced levels of IFNAR1 in 3a-expressing cells. |
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| COVID-19 research v0.40 | MSH6 |
Ellen McDonagh Source Expert Review Green was added to MSH6. Added phenotypes Colorectal cancer, hereditary nonpolyposis, type 5 614350; Endometrial cancer, familial 608089; Predominantly Antibody Deficiencies; Family or personal history of cancer; Mismatch repair cancer syndrome 276300 for gene: MSH6 Rating Changed from Red List (low evidence) to Green List (high evidence) |
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| COVID-19 research v0.36 | TAZ |
Ellen McDonagh gene: TAZ was added gene: TAZ was added to Viral susceptibility. Sources: Expert Review Green,ESID Registry 20171117,North West GLH,Victorian Clinical Genetics Services,Congenital neutropaenia v1.22,GRID V2.0,NHS GMS,London North GLH,IUIS Classification February 2018 Mode of inheritance for gene: TAZ was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Phenotypes for gene: TAZ were set to Barth syndrome; 3-methylglutaconic aciduria, type II, 302060; Congenital defects of phagocyte number or function; Cardiomyopathy, myopathy, growth retardation, neutropenia; Cardioskeletal myopathy with neutropenia and abnormal mitochondria |
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| COVID-19 research v0.36 | AIRE |
Ellen McDonagh gene: AIRE was added gene: AIRE was added to Viral susceptibility. Sources: Expert Review Green,ESID Registry 20171117,North West GLH,Victorian Clinical Genetics Services,GRID V2.0,NHS GMS,GOSH PID v.8.0,London North GLH,IUIS Classification February 2018 Mode of inheritance for gene: AIRE was set to BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal Publications for gene: AIRE were set to 9888391; 19807739; 11600535; 11836330; 10677297; 29437776; 29108822; 19758376; 9398839; 9837820; 28911151 Phenotypes for gene: AIRE were set to Autoimmune polyendocrinopathy syndrome, type I, with or without reversible metaphyseal dysplasia, 240300; Multiple endocrine deficiency Addison disease candidiasis syndrome; Autoimmune hypoparathyroidism chronic candidiasis Addison disease syndrome; Diseases of Immune Dysregulation; Chronic mucocutaneous candidiasis (CMC); Autoimmunity: hypoparathyroidism hypothyroidism, adrenal insufficiency, diabetes, gonadal dysfunction and other endocrine abnormalities, chronic mucocutaneous candidiasis, dental enamel hypoplasia, alopecia areata enteropathy, pernicious anemia; Hypoparathyroidism Addison disease mucocutaneous candidiasis syndrome; Autoimmune polyendocrinopathy candidiasis ectodermal dystrophy (APECED) |
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| COVID-19 research v0.36 | MSH6 |
Ellen McDonagh gene: MSH6 was added gene: MSH6 was added to Viral susceptibility. Sources: Expert Review Red,IUIS Classification February 2018,GRID V2.0,IUIS Classification December 2019 Mode of inheritance for gene: MSH6 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MSH6 were set to 32086639; 32048120 Phenotypes for gene: MSH6 were set to Colorectal cancer, hereditary nonpolyposis, type 5 614350; Endometrial cancer, familial 608089; Predominantly Antibody Deficiencies; Family or personal history of cancer; Mismatch repair cancer syndrome 276300 |
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| COVID-19 research v0.36 | TCN2 |
Ellen McDonagh gene: TCN2 was added gene: TCN2 was added to Viral susceptibility. Sources: Expert Review Green,Agranulocytosis v1.3,Combined B and T cell defect v1.12,ESID Registry 20171117,North West GLH,Victorian Clinical Genetics Services,Congenital neutropaenia v1.22,GRID V2.0,NHS GMS,London North GLH,A- or hypo-gammaglobulinaemia v1.25,SCID v1.6,IUIS Classification February 2018 Mode of inheritance for gene: TCN2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TCN2 were set to 20352340; 24305960; 7849710; 7980584; 18956254 Phenotypes for gene: TCN2 were set to Transcobalamin-2 precursor; Transcobalamin II deficiency; Agammaglobulinemia; Megaloblastic anemia, pancytopenia, if untreated for prolonged periods results in intellectual disability; pancytopenia; Transcobalamin II deficiency, 275350; neutropenic colitis; Defects of Vitamin B12 and Folate metabolism; megaloblastic bone; can have a presentation similar to severe combined immunodeficiency; Combined immunodeficiencies with associated or syndromic features |
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| COVID-19 research v0.36 | SLC46A1 |
Ellen McDonagh gene: SLC46A1 was added gene: SLC46A1 was added to Viral susceptibility. Sources: Expert Review Green,ESID Registry 20171117,North West GLH,Victorian Clinical Genetics Services,GRID V2.0,NHS GMS,London North GLH,IUIS Classification February 2018 Mode of inheritance for gene: SLC46A1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SLC46A1 were set to 17446347; 17129779; 27664775 Phenotypes for gene: SLC46A1 were set to Folate malabsorption, hereditary 229050; Congenital defect of folate absorption; Megaloblastic anemia, failure to thrive, if untreated for prolonged periods results in intellectual disability; Defects of Vitamin B12 and Folate metabolism; Combined immunodeficiencies with associated or syndromic features |
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| COVID-19 research v0.36 | RMRP |
Ellen McDonagh gene: RMRP was added gene: RMRP was added to Viral susceptibility. Sources: Expert Review Green,Combined B and T cell defect v1.12,ESID Registry 20171117,North West GLH,Victorian Clinical Genetics Services,GRID V2.0,NHS GMS,GOSH PID v.8.0,London North GLH,IUIS Classification February 2018 Mode of inheritance for gene: RMRP was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: RMRP were set to 26830278; 2328993; 3582365; 24217815; 26279652; 25663137 Phenotypes for gene: RMRP were set to Short-limbed dwarfism with metaphyseal dysostosis, sparse hair, bone marrow failure, autoimmunity, susceptibility to lymphoma and other cancers, impaired spermatogenesis, neuronal dysplasia of the intestine; Cartilage hair hypoplasia; Cartilage-hair hypoplasia; Anauxetic dysplasia 1, 232220; Omenn syndrome; Cartilage-hair hypoplasia, with or without immunodeficiency; Combined immunodeficiencies with associated or syndromic features |
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| COVID-19 research v0.36 | MTHFD1 |
Ellen McDonagh gene: MTHFD1 was added gene: MTHFD1 was added to Viral susceptibility. Sources: Expert Review Green,ESID Registry 20171117,North West GLH,Victorian Clinical Genetics Services,GRID V2.0,NHS GMS,London North GLH,IUIS Classification February 2018 Mode of inheritance for gene: MTHFD1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MTHFD1 were set to 25633902; 27707659 Phenotypes for gene: MTHFD1 were set to Recurrent bacterial infection, Pneumocystis jirovecii, megaloblastic anemia, failure to thrive, neutropenia, seizures, intellectual disability, folate-responsive; Combined immunodeficiency and megaloblastic anemia with or without hyperhomocysteinemia 617780; Combined immunodeficiencies with associated or syndromic features; Defects of Vitamin B12 and Folate metabolism |
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| COVID-19 research v0.36 | HTRA2 |
Ellen McDonagh gene: HTRA2 was added gene: HTRA2 was added to Viral susceptibility. Sources: Expert Review Green,North West GLH,Congenital neutropaenia v1.22,NHS GMS,London North GLH Mode of inheritance for gene: HTRA2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: HTRA2 were set to 27696117; 27208207 Phenotypes for gene: HTRA2 were set to 3-methylglutaconic aciduria, type VIII, 617248; early onset neurological syndrome; neutropenia |
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| COVID-19 research v0.36 | DNAJC21 |
Ellen McDonagh gene: DNAJC21 was added gene: DNAJC21 was added to Viral susceptibility. Sources: Expert Review Green,North West GLH,NHS GMS,London North GLH,IUIS Classification February 2018 Mode of inheritance for gene: DNAJC21 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: DNAJC21 were set to 27346687; 29700810; 28062395 Phenotypes for gene: DNAJC21 were set to Bone marrow failure syndrome 3, 617052; Metaphyseal changes, short stature, developmental delay, pancreatic dysfunction, bone marrow failure; Shwachman-Diamond syndrome-like; Congenital defects of phagocyte number or function |
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| COVID-19 research v0.36 | CSF2RB |
Ellen McDonagh gene: CSF2RB was added gene: CSF2RB was added to Viral susceptibility. Sources: Expert Review Green,North West GLH,NHS GMS,London North GLH,IUIS Classification February 2018 Mode of inheritance for gene: CSF2RB was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CSF2RB were set to 21205713; 21075760; 9410898 Phenotypes for gene: CSF2RB were set to Surfactant metabolism dysfunction, pulmonary, 5, 614370; Congenital defects of phagocyte number or function; Alveolar proteinosis |
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| COVID-19 research v0.36 | CSF2RA |
Ellen McDonagh gene: CSF2RA was added gene: CSF2RA was added to Viral susceptibility. Sources: Expert Review Green,ESID Registry 20171117,North West GLH,Victorian Clinical Genetics Services,GRID V2.0,NHS GMS,London North GLH,IUIS Classification February 2018 Mode of inheritance for gene: CSF2RA was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CSF2RA were set to 1972780; 18955570; 23632888; 18955567 Phenotypes for gene: CSF2RA were set to Congenital pulmonary alveolar proteinosis; Alveolar proteinosis; Congenital defects of phagocyte number or function; Pulmonary alveolar proteinosis; hypersensitivity; Surfactant metabolism dysfunction, pulmonary 4, 300770 |
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| COVID-19 research v0.36 | CLPB |
Ellen McDonagh gene: CLPB was added gene: CLPB was added to Viral susceptibility. Sources: Expert Review Green,Victorian Clinical Genetics Services,North West GLH,GRID V2.0,NHS GMS,London North GLH,IUIS Classification February 2018 Mode of inheritance for gene: CLPB was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CLPB were set to 25650066; 25597510; 27891836; 28687938; 26916670; 25597511 Phenotypes for gene: CLPB were set to Neurocognitive developmental aberrations, microcephaly, hypoglycemia, hypotonia, ataxia, seizures, cataracts, IUGR; Congenital defects of phagocyte number or function; 3-methylglutaconic aciduria, type VII, with cataracts, neurologic involvement and neutropenia, 616271; 3-methylglutaconic aciduria, type VII; 3-methylglutaconic aciduria, type 7; Recurrent or severe infection |
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