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Monogenic hearing loss v2.186 | RNF220 |
Ivone Leong changed review comment from: Comment on list classification: New gene added by Konstantinos Varvagiannis. This gene is currently not associated with a phenotype in OMIM or Gene2Phenotype. There are >3 cases for this gene; however, 3 of the cases described in PMID:33964137 are of Roma descent and haplotype analysis has shown that the variant found in these families are due to a founder effect (c.1094G>A, p.Arg365Gly). A separate Roma family also has the same variant (c.1094G>A, p.Arg365Gly). An Italian family with similar phenotypes has a different variant (c.1088G>A, p.Arg363Gly). The authors also report on in vitro and in vivo studies. There is enough evidence to support a gene-disease association; however, the ID severity in these patients do not meet the criteria (moderate to severe) for this panel (patients show mild (mostly) to moderate severity). Therefore, this gene has been given an Amber rating.; to: Comment on list classification: New gene added by Konstantinos Varvagiannis. This gene is currently not associated with a phenotype in OMIM or Gene2Phenotype. There are >3 cases for this gene; however, 3 of the cases described in PMID:33964137 are of Roma descent and haplotype analysis has shown that the variant found in these families are due to a founder effect (c.1094G>A, p.Arg365Gly). A separate Roma family also has the same variant (c.1094G>A, p.Arg365Gly). An Italian family with similar phenotypes has a different variant (c.1088G>A, p.Arg363Gly). The authors also report on in vitro and in vivo studies. There is enough evidence to support a gene-disease association. Therefore, this gene should be Green at the next review. |
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Monogenic hearing loss v2.142 | KCNMA1 | Arina Puzriakova Added comment: Comment on list classification: Multiple individuals with KCNMA1-related channelopathy characterised by a variety of neurologic symptoms, with both mono- and biallelic cases reported. Only a single patient described by Liang et al., 2019 (PMID: 31152168) with hearing impairment and therefore a Red rating on this panel is appropriate. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Monogenic hearing loss v2.125 | PMP22 |
Eleanor Williams changed review comment from: Associated with Charcot-Marie-Tooth disease, type 1E #118300 (AD) in which hearing loss is listed as a clinical feature PMID: 12578939 - Sambuughin et al 2003 - report deafness associated with a demyelinating neuropathy in three individuals of a family in whom a novel 12bp deletion resulting in the deletion of four-amino acid deletion (115-118) in the PMP22 gene was identified (targeted sequencing of PMP22). No asymptomatic family members had the deletion nor was it detected in 55 healthy controls. PMID: 11835375 - Boerkoel et al 2002 - screened PMP22, GJB1, and MPZ contained 159 unrelated patients with primary peripheral demyelinating neuropathy or a primary peripheral axonal neuropathy and report 5 which have heterozygous variants in PMP22, 1 of which had a clinical diagnosis of CMT1 + deafness (variant 82T>C W28R). An affected sibling had the same variant. PMID: 10330345 - Kovach et al 1999 - analysis of a 7 generation family from central Illinois with autosomal dominant CMT and deafness. In the 31 affected family members, hearing loss ranged from borderline normal to profound hearing loss, with all having at least mild bilateral hearing loss by adulthood. Following haplotype analysis they sequenced PMP22 and a point mutation was found in affected individuals G->C at position 248 in exon 4 in the heterozygous state (p.Ala67Pro). PMID: 8355122 - Hamiel et al 1993 - Abstract only accessed. Describe a family with hereditary motor-sensory neuropathy with sensorineural deafness is described; the neurologic features and deafness were apparent in early childhood and infancy. Summary: 3 cases in which hearing loss is reported in CMT patients with PMP22 variants. In all cases a limited number of genes were sequenced.; to: Associated with Charcot-Marie-Tooth disease, type 1E #118300 (AD) in which hearing loss is listed as a clinical feature PMID: 12578939 - Sambuughin et al 2003 - report deafness associated with a demyelinating neuropathy in three individuals of a family in whom a novel 12bp deletion resulting in the deletion of four-amino acid deletion (115-118) in the PMP22 gene was identified (targeted sequencing of PMP22). No asymptomatic family members had the deletion nor was it detected in 55 healthy controls. PMID: 11835375 - Boerkoel et al 2002 - screened PMP22, GJB1, and MPZ in 159 unrelated patients with primary peripheral demyelinating neuropathy or a primary peripheral axonal neuropathy and report 5 which have heterozygous variants in PMP22, 1 of which had a clinical diagnosis of CMT1 + deafness (variant 82T>C W28R). An affected sibling had the same variant. PMID: 10330345 - Kovach et al 1999 - analysis of a 7 generation family from central Illinois with autosomal dominant CMT and deafness. In the 31 affected family members, hearing loss ranged from borderline normal to profound hearing loss, with all having at least mild bilateral hearing loss by adulthood. Following haplotype analysis they sequenced PMP22 and a point mutation was found in affected individuals G->C at position 248 in exon 4 in the heterozygous state (p.Ala67Pro). PMID: 8355122 - Hamiel et al 1993 - Abstract only accessed. Describe a family with hereditary motor-sensory neuropathy with sensorineural deafness is described; the neurologic features and deafness were apparent in early childhood and infancy. Summary: 3 cases in which hearing loss is reported in CMT patients with PMP22 variants. In all cases a limited number of genes were sequenced. |
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Monogenic hearing loss v2.96 | PMP22 |
Eleanor Williams changed review comment from: Associated with Charcot-Marie-Tooth disease, type 1E #118300 (AD) in which hearing loss is listed as a clinical feature PMID: 12578939 - Sambuughin et al 2003 - report deafness associated with a demyelinating neuropathy in three individuals of a family in whom a novel 12bp deletion resulting in the deletion of four-amino acid deletion (115-118) in the PMP22 gene was identified. No asymptomatic family members had the deletion nor was it detected in 55 healthy controls. PMID: 11835375 - Boerkoel et al 2002 - screened PMP22, GJB1, and MPZ contained 159 unrelated patients with primary peripheral demyelinating neuropathy or a primary peripheral axonal neuropathy and report 5 which have heterozygous variants in PMP22, 1 of which had a clinical diagnosis of CMT1 + deafness (variant 82T>C W28R). An affected sibling had the same variant. PMID: 10330345 - Kovach et al 1999 - analysis of a 7 generation family from central Illinois with autosomal dominant CMT and deafness. In the 31 affected family members, hearing loss ranged from borderline normal to profound hearing loss, with all having at least mild bilateral hearing loss by adulthood. A point mutation was found in affected individuals G->C at position 248 in exon 4 in the heterozygous state (p.Ala67Pro). PMID: 8355122 - Hamiel et al 1993 - Abstract only accessed. Describe a family with hereditary motor-sensory neuropathy with sensorineural deafness is described; the neurologic features and deafness were apparent in early childhood and infancy. Summary: 3 cases in which hearing loss is reported in CMT patients with PMP22 variants.; to: Associated with Charcot-Marie-Tooth disease, type 1E #118300 (AD) in which hearing loss is listed as a clinical feature PMID: 12578939 - Sambuughin et al 2003 - report deafness associated with a demyelinating neuropathy in three individuals of a family in whom a novel 12bp deletion resulting in the deletion of four-amino acid deletion (115-118) in the PMP22 gene was identified (targeted sequencing of PMP22). No asymptomatic family members had the deletion nor was it detected in 55 healthy controls. PMID: 11835375 - Boerkoel et al 2002 - screened PMP22, GJB1, and MPZ contained 159 unrelated patients with primary peripheral demyelinating neuropathy or a primary peripheral axonal neuropathy and report 5 which have heterozygous variants in PMP22, 1 of which had a clinical diagnosis of CMT1 + deafness (variant 82T>C W28R). An affected sibling had the same variant. PMID: 10330345 - Kovach et al 1999 - analysis of a 7 generation family from central Illinois with autosomal dominant CMT and deafness. In the 31 affected family members, hearing loss ranged from borderline normal to profound hearing loss, with all having at least mild bilateral hearing loss by adulthood. Following haplotype analysis they sequenced PMP22 and a point mutation was found in affected individuals G->C at position 248 in exon 4 in the heterozygous state (p.Ala67Pro). PMID: 8355122 - Hamiel et al 1993 - Abstract only accessed. Describe a family with hereditary motor-sensory neuropathy with sensorineural deafness is described; the neurologic features and deafness were apparent in early childhood and infancy. Summary: 3 cases in which hearing loss is reported in CMT patients with PMP22 variants. In all cases a limited number of genes were sequenced. |
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Monogenic hearing loss v2.81 | COL9A1 |
Eleanor Williams changed review comment from: Associated with Stickler syndrome, type IV #614134 in OMIM. No inheritance given. Summary: 1 Turkish and 2 distantly related Moroccan families with frameshift COL9A1 variants and Stickler syndrome. 2 cases of non-syndromic hearing loss (1 missense, 1 in-frame deletion of several exons). PMID: 16909383 Van Camp et al 2006 - report a family of Moroccan origin with 4 children affected by Stickler syndrome and 6 unaffected children. The distantly related parents are unaffected. The 4 children showed symptoms characteristic of Stickler syndrome, including moderate-to-severe sensorineural hearing loss, moderate-to-high myopia with vitreoretinopathy, and epiphyseal dysplasia. Targeted analysis of COL9A1 resulted in the identification of a homozygous R295X variant in the four affected children. 4 unaffected children and the parents were heterozygous carriers. Two unaffected children did not carry the variant at all. PMID: 21421862 - Nikopoulos et al 2011 - Report two consanguineous families with children with Stickler syndrome. One Turkish family has two affected sisters, the other Moroccan family has one affected boy. The Turkish girls were found to have a homozygous COL9A1 mutation (p.R507X) while the Moroccan boy had the same variant found in the Moroccan family published by Van Camp et al 2006 (p.R295X). Phenotypic features include myopia, cataracts, distinct vitreous changes, progressive chorioretinal degeneration, and exudative and rhegmatogenous retinal detachments. All three had sensorineural hearing loss and epiphyseal dysplasia. Haplotype analysis of the Moroccan family showed they shared the identical disease haplotype in the 2-cM area encompassing COL9A1 as the previously described Moroccan family, indicating a possible relationship. PMID: 23967202 - Miyagawa et al 2013 - report one case of a missense variant (NM_001851.3, c.2395G>C, p.G799R)in COL9A1 in a patient with sporadic early onset hearing loss, identified by targeted exome sequencing. Detailed phenotype information not available. PMID: 31315069 - Hofrichter et al 2019 - report 2 patients with non-syndromic HL from an Iranian family. Both siblings were homozygous for a 44.6 kb in-frame deletion spanning exons 6 to 33 of COL9A1. The parents were heterozygous for the deletion. The initially presented non-syndromic HL at the age of 28 years, but clinical follow up has not been undertaken.; to: Associated with Stickler syndrome, type IV #614134 in OMIM. No inheritance given. Summary: 1 Turkish and 1 unknown ethnicity family with R507X variants and 2 distantly related Moroccan families with R295X COL9A1 variants and Stickler syndrome. 2 cases of non-syndromic hearing loss (1 missense, 1 in-frame deletion of several exons). PMID: 16909383 Van Camp et al 2006 - report a family of Moroccan origin with 4 children affected by Stickler syndrome and 6 unaffected children. The distantly related parents are unaffected. The 4 children showed symptoms characteristic of Stickler syndrome, including moderate-to-severe sensorineural hearing loss, moderate-to-high myopia with vitreoretinopathy, and epiphyseal dysplasia. Targeted analysis of COL9A1 resulted in the identification of a homozygous R295X variant in the four affected children. 4 unaffected children and the parents were heterozygous carriers. Two unaffected children did not carry the variant at all. PMID: 21421862 - Nikopoulos et al 2011 - Report two consanguineous families with children with Stickler syndrome. One Turkish family has two affected sisters, the other Moroccan family has one affected boy. The Turkish girls were found to have a homozygous COL9A1 mutation (p.R507X) while the Moroccan boy had the same variant found in the Moroccan family published by Van Camp et al 2006 (p.R295X). Phenotypic features include myopia, cataracts, distinct vitreous changes, progressive chorioretinal degeneration, and exudative and rhegmatogenous retinal detachments. All three had sensorineural hearing loss and epiphyseal dysplasia. Haplotype analysis of the Moroccan family showed they shared the identical disease haplotype in the 2-cM area encompassing COL9A1 as the previously described Moroccan family, indicating a possible relationship. PMID: 23967202 - Miyagawa et al 2013 - report one case of a missense variant (NM_001851.3, c.2395G>C, p.G799R)in COL9A1 in a patient with sporadic early onset hearing loss, identified by targeted exome sequencing. Detailed phenotype information not available. PMID: 31315069 - Hofrichter et al 2019 - report 2 patients with non-syndromic HL from an Iranian family. Both siblings were homozygous for a 44.6 kb in-frame deletion spanning exons 6 to 33 of COL9A1. The parents were heterozygous for the deletion. The initially presented non-syndromic HL at the age of 28 years, but clinical follow up has not been undertaken. PMID: 31090205 - Nixon et al 2019 - report 1 case of a 6 year old child with a homozygous nonsense variant in COL9A1 (c.1519C>T, p.(Arg507Ter)) and a diagnosis of Stickler syndrome. This variant has been described previously (Nikopoulos et al., 2011). The child had high‐frequency sensorineural hearing loss. |
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Monogenic hearing loss v2.74 | COL9A1 |
Eleanor Williams changed review comment from: Associated with Stickler syndrome, type IV #614134 in OMIM. No inheritance given. Summary: 1 Turkish and 2 distantly related Moroccan families with frameshift COL9A1 variants and Stickler syndrome. 2 cases on non-syndromic hearing loss (1 missense, 1 in-frame deletion of several exons). PMID: 16909383 Van Camp et al 2006 - report a family of Moroccan origin with 4 children affected by Stickler syndrome and 6 unaffected children. The distantly related parents are unaffected. The 4 children showed symptoms characteristic of Stickler syndrome, including moderate-to-severe sensorineural hearing loss, moderate-to-high myopia with vitreoretinopathy, and epiphyseal dysplasia. Targeted analysis of COL9A1 resulted in the identification of a homozygous R295X variant in the four affected children. 4 unaffected children and the parents were heterozygous carriers. Two unaffected children did not carry the variant at all. PMID: 21421862 - Nikopoulos et al 2011 - Report two consanguineous families with children with Stickler syndrome. One Turkish family has two affected sisters, the other Moroccan family has one affected boy. The Turkish girls were found to have a homozygous COL9A1 mutation (p.R507X) while the Moroccan boy had the same variant found in the Moroccan family published by Van Camp et al 2006 (p.R295X). Phenotypic features include myopia, cataracts, distinct vitreous changes, progressive chorioretinal degeneration, and exudative and rhegmatogenous retinal detachments. All three had sensorineural hearing loss and epiphyseal dysplasia. Haplotype analysis of the Moroccan family showed they shared the identical disease haplotype in the 2-cM area encompassing COL9A1 as the previously described Moroccan family, indicating a possible relationship. PMID: 23967202 - Miyagawa et al 2013 - report one case of a missense variant (NM_001851.3, c.2395G>C, p.G799R)in COL9A1 in a patient with sporadic early onset hearing loss, identified by targeted exome sequencing. Detailed phenotype information not available. PMID: 31315069 - Hofrichter et al 2019 - report 2 patients with non-syndromic HL from an Iranian family. Both siblings were homozygous for a 44.6 kb in-frame deletion spanning exons 6 to 33 of COL9A1. The parents were heterozygous for the deletion. The initially presented non-syndromic HL at the age of 28 years, but clinical follow up has not been undertaken.; to: Associated with Stickler syndrome, type IV #614134 in OMIM. No inheritance given. Summary: 1 Turkish and 2 distantly related Moroccan families with frameshift COL9A1 variants and Stickler syndrome. 2 cases of non-syndromic hearing loss (1 missense, 1 in-frame deletion of several exons). PMID: 16909383 Van Camp et al 2006 - report a family of Moroccan origin with 4 children affected by Stickler syndrome and 6 unaffected children. The distantly related parents are unaffected. The 4 children showed symptoms characteristic of Stickler syndrome, including moderate-to-severe sensorineural hearing loss, moderate-to-high myopia with vitreoretinopathy, and epiphyseal dysplasia. Targeted analysis of COL9A1 resulted in the identification of a homozygous R295X variant in the four affected children. 4 unaffected children and the parents were heterozygous carriers. Two unaffected children did not carry the variant at all. PMID: 21421862 - Nikopoulos et al 2011 - Report two consanguineous families with children with Stickler syndrome. One Turkish family has two affected sisters, the other Moroccan family has one affected boy. The Turkish girls were found to have a homozygous COL9A1 mutation (p.R507X) while the Moroccan boy had the same variant found in the Moroccan family published by Van Camp et al 2006 (p.R295X). Phenotypic features include myopia, cataracts, distinct vitreous changes, progressive chorioretinal degeneration, and exudative and rhegmatogenous retinal detachments. All three had sensorineural hearing loss and epiphyseal dysplasia. Haplotype analysis of the Moroccan family showed they shared the identical disease haplotype in the 2-cM area encompassing COL9A1 as the previously described Moroccan family, indicating a possible relationship. PMID: 23967202 - Miyagawa et al 2013 - report one case of a missense variant (NM_001851.3, c.2395G>C, p.G799R)in COL9A1 in a patient with sporadic early onset hearing loss, identified by targeted exome sequencing. Detailed phenotype information not available. PMID: 31315069 - Hofrichter et al 2019 - report 2 patients with non-syndromic HL from an Iranian family. Both siblings were homozygous for a 44.6 kb in-frame deletion spanning exons 6 to 33 of COL9A1. The parents were heterozygous for the deletion. The initially presented non-syndromic HL at the age of 28 years, but clinical follow up has not been undertaken. |
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Monogenic hearing loss v2.44 | RIPOR2 | Arina Puzriakova Added comment: Comment on mode of inheritance: Only two publications, describing different patterns of inheritance (AR or AD). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Monogenic hearing loss v2.43 | RIPOR2 | Arina Puzriakova Added comment: Comment on list classification: Recent publication described several families, but with a founder variant. Therefore currently still insufficient cases for a rating upgrade. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Monogenic hearing loss v2.4 | SPATC1L |
Zornitza Stark gene: SPATC1L was added gene: SPATC1L was added to Hearing loss. Sources: Expert list Mode of inheritance for gene: SPATC1L was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: SPATC1L were set to 30177775 Phenotypes for gene: SPATC1L were set to Deafness Added comment: Two families with compound het variants, and one family with heterozygous variant and dominant pattern of inheritance described, some functional data. Sources: Expert list |
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Monogenic hearing loss v2.4 | AIFM1 |
Zornitza Stark gene: AIFM1 was added gene: AIFM1 was added to Hearing loss. Sources: Expert list Mode of inheritance for gene: AIFM1 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: AIFM1 were set to 25986071 Phenotypes for gene: AIFM1 were set to Deafness, X-linked 5, MIM#300614 Review for gene: AIFM1 was set to GREEN Added comment: More than 10 unrelated families described. Sources: Expert list |
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Monogenic hearing loss v1.118 | ATP2B2 | Eleanor Williams Added comment: Comment on mode of inheritance: The 5 cases described in PMID: 30535804 show a monoallelic pattern of inheritance |