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Intellectual disability - microarray and sequencing v3.982 DDB1 Arina Puzriakova changed review comment from: - PMID: 33743206 (2021) - 8 unrelated individuals with de novo variants in DDB1, including one recurrent variant in four individuals (c.637G>A, p.Glu213Lys) and two different substitutions at the same amino acid residue (p.Arg188Trp and p.Arg188Gln). Clinical features were consistent and include hypotonia (7/8) and mild-moderate developmental delay or intellectual disability (8/8) and similar facial gestalt. Brachydactyly was common and most noticeable in the feet (6/8), and two individuals had cutaneous toe syndactyly. All three older individuals had a BMI in the obese range for their age. Functional studies using patient-derived lymphoblasts showed altered DDB1 function resulting in abnormal DNA damage signatures and histone methylation following UV-induced DNA damage.
Sources: Literature; to: - PMID: 33743206 (2021) - 8 unrelated individuals with de novo variants in DDB1, including one recurrent variant in four individuals (c.637G>A, p.Glu213Lys) and two different substitutions at the same amino acid residue (p.Arg188Trp and p.Arg188Gln). Clinical features were consistent and include hypotonia (7/8) and mild-moderate developmental delay or intellectual disability (8/8) and similar facial gestalt. Brachydactyly was common and most noticeable in the feet (6/8), and two individuals had cutaneous toe syndactyly. All three older individuals had a BMI in the obese range for their age. Functional studies using patient-derived lymphoblasts showed altered DDB1 function resulting in abnormal DNA damage signatures and histone methylation following UV-induced DNA damage.

Variants in other CRL4 complex components, such as CUL4B (MIM# 300304) and PHIP (MIM# 612870), have been shown to cause overlapping phenotypes consisting of syndromic ID with hypotonia and obesity.
Sources: Literature
Intellectual disability - microarray and sequencing v2.458 PHIP Louise Daugherty Classified gene: PHIP as Green List (high evidence)
Intellectual disability - microarray and sequencing v2.458 PHIP Louise Daugherty Added comment: Comment on list classification: Changed rating from Red to Green. Publications now support gene-disease association and rating of this gene to Green on the ID panel.
Intellectual disability - microarray and sequencing v2.458 PHIP Louise Daugherty Gene: phip has been classified as Green List (High Evidence).
Intellectual disability - microarray and sequencing v2.457 PHIP Louise Daugherty Added comment: Comment on phenotypes: updated with OMIN and MIMid
Intellectual disability - microarray and sequencing v2.457 PHIP Louise Daugherty Phenotypes for gene: PHIP were changed from INTELLECTUAL DISABILITY to INTELLECTUAL DISABILITY; Developmental delay, intellectual disability, obesity, and dysmorphic features, 617991
Intellectual disability - microarray and sequencing v2.456 PHIP Louise Daugherty Publications for gene: PHIP were set to 0
Intellectual disability - microarray and sequencing v2.455 PHIP Louise Daugherty edited their review of gene: PHIP: Added comment: Recommendation that this gene should be Green based on recent publication PMID:29209020, more than 20 unrelated cases Pers comm. Ian Berry (NHS Leeds Genetics Laboratory); Changed rating: GREEN; Changed publications: 29209020, 23033978, 27900362; Changed phenotypes: Developmental delay, intellectual disability, obesity, and dysmorphic features, 617991; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown