Activity
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| Intellectual disability v9.206 | OGDHL | Achchuthan Shanmugasundram Tag gene-checked tag was added to gene: OGDHL. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v9.122 | OGDHL |
Ida Ertmanska changed review comment from: As reviewed by Arina Puzriakova, there are at least 10 individuals from 9 unrelated families with biallelic variants in OGDHL (PMIDs: 28017472; 34800363). The individuals present with a complex neurodevelopmental disorder, also known as Yoon-Bellen syndrome. The phenotype is highly variable between the cases and includes developmental delay / intellectual disability. PMID: 38031187 Lin et al. 2023 - authors re-evaluate the evidence for the association between Yoon-Bellen neurodevelopmental syndrome and the OGDHL gene. The article reports further 14 individuals from 12 unrelated, diverse families, with biallelic OGDHL variants. Patients presented with a range of heterogeneous symptoms: neurodevelopmental disorder, neurodegeneration, infantile-onset epileptic encephalopathy, skeletal dysplasia, childhood-onset epilepsy, multiple congenital anomalies, dysmorphism, non-syndromic hearing loss, neuromuscular disorders, and congenital heart defects. 9/14 reported patients had developmental delay/intellectual disability. Due to the highly variable phenotype, authors propose 3 possible hypotheses: ‘biallelic OGDHL variants lead to a highly variable monogenic disorder, variants in OGDHL are following a complex pattern of inheritance, or they may not be causative at all’. In total, 17/21 families reported in the above articles have history of consanguinity. In most cases, additional likely pathogenic mutations were discovered in other genes, which complicates the phenotypic understanding. Functional evidence: A zebrafish knockout of Ogdhl (78% identical gene ortholog) resulted in a range of phenotypes: smaller head, eye, and body, and heart edema. No seizure manifestation, visual impairment, or hearing deficiencies were observed. Authors note elevated neuronal cell death in the eye, hindbrain, and spinal cord of knockout animals. The phenotype was rescued by injection of human OGDHL. Moreover, OGDHL, OGDH, and DHTKD1 are isoenzymes – through double and triple gene knockouts, authors provide evidence indicating a complex compensatory relationship (PMID: 38031187). This gene should remain Green for Intellectual disability. There is strong evidence for the association between OGDHL and Yoon-Bellen neurodevelopmental syndrome. However, care should be taken not to attribute all clinical symptoms to OGDHL dysfunction.; to: As reviewed by Arina Puzriakova, there are at least 10 individuals from 9 unrelated families with biallelic variants in OGDHL (PMIDs: 28017472; 34800363). The individuals present with a complex neurodevelopmental disorder, also known as Yoon-Bellen syndrome. The phenotype is highly variable between the cases and includes developmental delay / intellectual disability. PMID: 38031187 Lin et al. 2023 - authors re-evaluate the evidence for the association between Yoon-Bellen neurodevelopmental syndrome and the OGDHL gene. The article reports further 14 individuals from 12 unrelated, diverse families, with biallelic OGDHL variants. Patients presented with a range of heterogeneous symptoms: hypotonia (9/14), short stature and variable dysmorphic facial features (each 8/14), failure to thrive (7/14), developmental delay/intellectual disability (9/14), seizures (4/14), hearing loss (4/14), and microcephaly (3/14). Due to the highly variable phenotype, authors propose 3 possible hypotheses: ‘biallelic OGDHL variants lead to a highly variable monogenic disorder, variants in OGDHL are following a complex pattern of inheritance, or they may not be causative at all’. In total, 17/21 families reported in the above articles have history of consanguinity. In most cases, additional likely pathogenic mutations were discovered in other genes, which complicates the phenotypic understanding. Functional evidence: A zebrafish knockout of Ogdhl (78% identical gene ortholog) resulted in a range of phenotypes: smaller head, eye, and body, and heart edema. No seizure manifestation, visual impairment, or hearing deficiencies were observed. Authors note elevated neuronal cell death in the eye, hindbrain, and spinal cord of knockout animals. The phenotype was rescued by injection of human OGDHL. Moreover, OGDHL, OGDH, and DHTKD1 are isoenzymes – through double and triple gene knockouts, authors provide evidence indicating a complex compensatory relationship (PMID: 38031187). This gene should remain Green for Intellectual disability. There is strong evidence for the association between OGDHL and Yoon-Bellen neurodevelopmental syndrome. However, care should be taken not to attribute all clinical symptoms to OGDHL dysfunction. |
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| Intellectual disability v9.99 | OGDHL | Ida Ertmanska changed review comment from: Comment on list classification: This gene should remain Green for Intellectual disability. There is strong evidence for the association between OGDHL and Yoon-Bellen neurodevelopmental syndrome. However, the phenotype is highly hetergoeneous, and care should be taken not to attribute all clinical symptoms to OGDHL dysfunction.; to: Comment on list classification: This gene should remain Green for Intellectual disability. There is strong evidence for the association between OGDHL and Yoon-Bellen neurodevelopmental syndrome. However, the phenotype is highly heterogeneous, and care should be taken not to attribute all clinical symptoms to OGDHL dysfunction. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v9.99 | OGDHL | Ida Ertmanska changed review comment from: Comment on list classifcation: This gene should remain Green for Intellectual disability. There is strong evidence for the association between OGDHL and Yoon-Bellen neurodevelopmental syndrome. However, the phenotype is highly hetergoeneous, and care should be taken not to attribute all clinical symptoms to OGDHL dysfunction.; to: Comment on list classification: This gene should remain Green for Intellectual disability. There is strong evidence for the association between OGDHL and Yoon-Bellen neurodevelopmental syndrome. However, the phenotype is highly hetergoeneous, and care should be taken not to attribute all clinical symptoms to OGDHL dysfunction. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v9.99 | OGDHL | Ida Ertmanska commented on gene: OGDHL: Comment on list classifcation: This gene should remain Green for Intellectual disability. There is strong evidence for the association between OGDHL and Yoon-Bellen neurodevelopmental syndrome. However, the phenotype is highly hetergoeneous, and care should be taken not to attribute all clinical symptoms to OGDHL dysfunction. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v9.99 | OGDHL | Ida Ertmanska reviewed gene: OGDHL: Rating: GREEN; Mode of pathogenicity: None; Publications: 28017472, 34800363, 38031187; Phenotypes: Yoon-Bellen neurodevelopmental syndrome, MONDO:0859221; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v4.53 | OGDHL | Arina Puzriakova Tag Q3_22_rating was removed from gene: OGDHL. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v4.53 | OGDHL | Arina Puzriakova edited their review of gene: OGDHL: Added comment: The rating of this gene has been updated to Green and the mode of inheritance set to 'BIALLELIC, autosomal or pseudoautosomal' following NHS Genomic Medicine Service approval.; Changed rating: GREEN | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v4.52 | OGDHL |
Arina Puzriakova Source NHS GMS was added to OGDHL. Source Expert Review Green was added to OGDHL. Rating Changed from Amber List (moderate evidence) to Green List (high evidence) |
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| Intellectual disability v3.1644 | OGDHL | Arina Puzriakova Tag Q3_22_rating tag was added to gene: OGDHL. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v3.1644 | OGDHL | Arina Puzriakova Phenotypes for gene: OGDHL were changed from Neurodevelopmental disorder featuring epilepsy, hearing loss and visual impairment to Yoon-Bellen neurodevelopmental syndrome, OMIM:619701 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v3.1643 | OGDHL | Arina Puzriakova Classified gene: OGDHL as Amber List (moderate evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v3.1643 | OGDHL |
Arina Puzriakova Added comment: Comment on list classification: New gene added by Zornitza Stark. There is sufficient evidence to promote to Green at the next GMS panel update. The NSRP1 gene is not yet associated with any phenotype in OMIM but has a 'moderate' disease confidence rating in G2P for 'OGDHL-related neurodevelopmental disorder with seizures, hearing loss and gait ataxia'. At least 10 individuals from 9 unrelated families identified with biallelic variants in this gene (PMIDs: 28017472; 34800363). Main clinical features include mild-to-severe DD/ID (9/10), seizures (5/10), gait ataxia (5/10), profound bilateral sensorineural hearing loss (4/10), spasticity (3/10). |
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| Intellectual disability v3.1643 | OGDHL | Arina Puzriakova Gene: ogdhl has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v3.1642 | OGDHL | Arina Puzriakova Publications for gene: OGDHL were set to 34800363 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intellectual disability v3.1478 | OGDHL |
Zornitza Stark gene: OGDHL was added gene: OGDHL was added to Intellectual disability. Sources: Literature Mode of inheritance for gene: OGDHL was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: OGDHL were set to 34800363 Phenotypes for gene: OGDHL were set to Neurodevelopmental disorder featuring epilepsy, hearing loss and visual impairment Review for gene: OGDHL was set to GREEN Added comment: Nine individuals from eight unrelated families carrying bi-allelic variants in OGDHL with a range of neurological and neurodevelopmental phenotypes including epilepsy, hearing loss, visual impairment, gait ataxia, microcephaly, and hypoplastic corpus callosum. Homozygous and compound heterozygous variants reported. Variant types reported include missense, PTCs and a synonymous variant that was shown to affect splicing. Functional studies with a CRISPR-Cas9-mediated tissue knockout with cDNA rescue system showed that the missense variants result in loss-of-function. Sources: Literature |
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