Expanding the genetics and phenotypes of ocular congenital cranial dysinnervation disorders

Phenocopy Proband Mendelian inheritance Pedigree chart Genome-wide Association Study Candidate gene Exome Medical genetics
DOI: 10.1016/j.gim.2024.101216 Publication Date: 2024-07-18T01:20:28Z
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ABSTRACT
Purpose:To identify genetic etiologies and genotype/phenotype associations for unsolved ocular congenital cranial dysinnervation disorders (oCCDDs). Methods:We coupled phenotyping with exome or genome sequencing of 467 probands (550 affected 1108 total individuals) genetically oCCDDs, integrating analyses pedigrees, human animal model phenotypes, de novo variants to rare candidate single nucleotide variants, insertion/deletions, structural disrupting protein-coding regions.Prioritized were classified pathogenicity evaluated correlations. Results:Analyses elucidated phenotypic subgroups, identified pathogenic/likely pathogenic variant(s) in 43/467 (9.2%), prioritized uncertain significance 70/467 additional (15.0%).These included known novel established oCCDD genes, genes associated syndromes that sometimes include oCCDDs (e.g., MYH10, KIF21B, TGFBR2, TUBB6), fit the syndromic component phenotype but had no prior association CDK13, TGFB2), reported phenotypes TUBA4A, KIF5C, CTNNA1, KLB, FGF21), phenocopies resulted misdiagnoses. Conclusion:This study suggests are clinically heterogeneous often overlapping other Mendelian conditions nominates many candidates future replication functional studies.
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