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DOORS syndrome and a recurrent truncating ATP6V1B2 variant
- Source :
- Genetics in medicine, 23(1), 149-154. Lippincott Williams and Wilkins, Genetics in Medicine, 23(1), 149-154. Lippincott Williams & Wilkins
- Publication Year :
- 2021
-
Abstract
- Purpose: Biallelic variants in TBC1D24, which encodes a protein that regulates vesicular transport, are frequently identified in patients with DOORS (deafness, onychodystrophy, osteodystrophy, intellectual disability [previously referred to as mental retardation], and seizures) syndrome. The aim of the study was to identify a genetic cause in families with DOORS syndrome and without a TBC1D24 variant. Methods: Exome or Sanger sequencing was performed in individuals with a clinical diagnosis of DOORS syndrome without TBC1D24 variants. Results: We identified the same truncating variant in ATP6V1B2 (NM_001693.4:c.1516C>T; p.Arg506*) in nine individuals from eight unrelated families with DOORS syndrome. This variant was already reported in individuals with dominant deafness onychodystrophy (DDOD) syndrome. Deafness was present in all individuals, along with onychodystrophy and abnormal fingers and/or toes. All families but one had developmental delay or intellectual disability and five individuals had epilepsy. We also describe two additional families with DDOD syndrome in whom the same variant was found. Conclusion: We expand the phenotype associated with ATP6V1B2 and propose another causal gene for DOORS syndrome. This finding suggests that DDOD and DOORS syndromes might lie on a spectrum of clinically and molecularly related conditions.
- Subjects :
- Sanger sequencing
Pediatrics
medicine.medical_specialty
business.industry
03.01. Általános orvostudomány
medicine.disease
Human genetics
TBC1D24 gene
Epilepsy
symbols.namesake
ATP6V1B2 gene
DOOR syndrome
DOORS syndrome
Onychodystrophy
Intellectual disability
symbols
DDOD syndrome
Medicine
exome sequencing
business
Exome
Genetics (clinical)
Exome sequencing
Subjects
Details
- Language :
- English
- ISSN :
- 10983600
- Database :
- OpenAIRE
- Journal :
- Genetics in medicine, 23(1), 149-154. Lippincott Williams and Wilkins, Genetics in Medicine, 23(1), 149-154. Lippincott Williams & Wilkins
- Accession number :
- edsair.doi.dedup.....a5e948fc5b0b30ab20979f39cf6d2a25