Abstract
PURPOSE: Pathogenic variants in ARID1B are one of the most frequent causes of intellectual disability (ID) as determined by large-scale exome sequencing studies. Most studies published thus far describe clinically diagnosed Coffin-Siris patients (ARID1B-CSS) and it is unclear whether these data are representative for patients identified through sequencing of unbiased ID cohorts (ARID1B-ID). We therefore sought to determine genotypic and phenotypic differences between ARID1B-ID and ARID1B-CSS. In parallel, we investigated the effect of different methods of phenotype reporting.
METHODS: Clinicians entered clinical data in an extensive web-based survey.
RESULTS: 79 ARID1B-CSS and 64 ARID1B-ID patients were included. CSS-associated dysmorphic features, such as thick eyebrows, long eyelashes, thick alae nasi, long and/or broad philtrum, small nails and small or absent fifth distal phalanx and hypertrichosis, were observed significantly more often (p < 0.001) in ARID1B-CSS patients. No other significant differences were identified.
CONCLUSION: There are only minor differences between ARID1B-ID and ARID1B-CSS patients. ARID1B-related disorders seem to consist of a spectrum, and patients should be managed similarly. We demonstrated that data collection methods without an explicit option to report the absence of a feature (such as most Human Phenotype Ontology-based methods) tended to underestimate gene-related features.
| Original language | English |
|---|---|
| Pages (from-to) | 1295-1307 |
| Number of pages | 13 |
| Journal | Genetics in Medicine |
| Volume | 21 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2019 |
Keywords
- Abnormalities, Multiple/genetics
- Adolescent
- Adult
- Child
- Child, Preschool
- Chromosomal Proteins, Non-Histone/genetics
- DNA-Binding Proteins/genetics
- Exome
- Face/abnormalities
- Female
- Genetic Association Studies/methods
- Genetic Variation/genetics
- Hand Deformities, Congenital/genetics
- Humans
- Infant
- Infant, Newborn
- Intellectual Disability/genetics
- Male
- Micrognathism/genetics
- Middle Aged
- Mutation
- Neck/abnormalities
- Penetrance
- Transcription Factors/genetics
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