Genetic modifiers and ascertainment drive variable expressivity of complex disorders
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Serval ID
serval:BIB_A51E7DFEFA16
Type
Autre: use this type when nothing else fits.
Collection
Publications
Institution
Title
Genetic modifiers and ascertainment drive variable expressivity of complex disorders
Issued date
28/08/2024
Language
english
Abstract
Variable expressivity of disease-associated variants implies a role for secondary variants that modify clinical features. We assessed the effects of modifier variants towards clinical outcomes of 2,252 individuals with primary variants. Among 132 families with the 16p12.1 deletion, distinct rare and common variant classes conferred risk for specific developmental features, including short tandem repeats for neurological defects and SNVs for microcephaly, while additional disease-associated variants conferred multiple genetic diagnoses. Within disease and population cohorts of 773 individuals with the 16p12.1 deletion, we found opposing effects of secondary variants towards clinical features across ascertainments. Additional analysis of 1,479 probands with other primary variants, such as 16p11.2 deletion and CHD8 variants, and 1,084 without primary variants, showed that phenotypic associations differed by primary variant context and were influenced by synergistic interactions between primary and secondary variants. Our study provides a paradigm to dissect the genomic architecture of complex disorders towards personalized treatment.
Pubmed
Create date
25/09/2024 10:04
Last modification date
26/09/2024 7:19