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Intellectual disability - microarray and sequencing v5.42 DARS2 Arina Puzriakova Phenotypes for gene: DARS2 were changed from Leukoencephalopathy with brain stem and spinal cord involvement and lactate elevation, 611105; LEUKOENCEPHALOPATHY WITH BRAINSTEM AND SPINAL CORD INVOLVEMENT AND LACTATE ELEVATION to Leukoencephalopathy with brain stem and spinal cord involvement and lactate elevation, OMIM:611105
Intellectual disability - microarray and sequencing v3.362 NHP2 Arina Puzriakova Phenotypes for gene: NHP2 were changed from Dyskeratosis congenita, autosomal recessive 2, 613987 to Dyskeratosis congenita, autosomal recessive 2, 613987; Høyeraal-Hreidarsson syndrome
Intellectual disability - microarray and sequencing v3.170 CCDC174 Konstantinos Varvagiannis gene: CCDC174 was added
gene: CCDC174 was added to Intellectual disability. Sources: Literature
Mode of inheritance for gene: CCDC174 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CCDC174 were set to 26358778
Phenotypes for gene: CCDC174 were set to Hypotonia, infantile, with psychomotor retardation - IHPMR, 616816
Penetrance for gene: CCDC174 were set to Complete
Mode of pathogenicity for gene: CCDC174 was set to Other
Review for gene: CCDC174 was set to AMBER
Added comment: Biallelic pathogenic CCDC174 variants cause Hypotonia, infantile, with psychomotor retardation - IHPMR (MIM 616816).

Volodarsky et al [2015 - PMID: 26358778] describe 6 children from 2 unrelated families with - among others - severe hypotonia, psychomotor delay and abducens nerve palsy. All affected subjects were homozygous for a stoploss variant. Evidence from functional studies/animal model is provided supporting the role of the gene in this phenotype.

Overall this gene can be considered for inclusion in the ID panel with amber rating (2 families, single founder variant, consistent phenotype, supportive studies) pending further reports.
Sources: Literature
Intellectual disability - microarray and sequencing v3.3 NHP2 Zornitza Stark reviewed gene: NHP2: Rating: AMBER; Mode of pathogenicity: None; Publications: 18523010, 31985013; Phenotypes: Dyskeratosis congenita, autosomal recessive 2, MIM# 613987, Høyeraal-Hreidarsson syndrome; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Intellectual disability - microarray and sequencing v2.1022 DARS Louise Daugherty Tag new-gene-name tag was added to gene: DARS.
Intellectual disability - microarray and sequencing v2.1022 DARS Louise Daugherty commented on gene: DARS
Intellectual disability - microarray and sequencing v2.468 DARS2 Louise Daugherty Source Victorian Clinical Genetics Services was added to DARS2.
Intellectual disability - microarray and sequencing DARS2 BRIDGE consortium edited their review of DARS2
Intellectual disability - microarray and sequencing DARS BRIDGE consortium edited their review of DARS
Intellectual disability - microarray and sequencing DARS2 BRIDGE consortium edited their review of DARS2
Intellectual disability - microarray and sequencing DARS BRIDGE consortium edited their review of DARS
Intellectual disability - microarray and sequencing DARS2 BRIDGE consortium reviewed DARS2
Intellectual disability - microarray and sequencing DARS BRIDGE consortium reviewed DARS