An evidence-based approach to establish the functional and clinical significance of copy number variants in intellectual and developmental disabilities

作者:Kaminsky Erin B; Kaul Vineith; Paschall Justin; Church Deanna M; Bunke Brian; Kunig Dawn; Moreno De Luca Daniel; Moreno De Luca Andres; Mulle Jennifer G; Warren Stephen T; Richard Gabriele; Compton John G; Fuller Amy E; Gliem Troy J; Huang Shuwen; Collinson Morag N; Beal Sarah J; Ackley Todd; Pickering Diane L; Golden Denae M; Aston Emily; Whitby Heidi; Shetty Shashirekha; Rossi Michael R; Rudd M Katharine; South Sarah T; Brothman Arthur R
来源:Genetics in Medicine, 2011, 13(9): 777-784.
DOI:10.1097/GIM.0b013e31822c79f9

摘要

Purpose: Copy number variants have emerged as a major cause of human disease such as autism and intellectual disabilities. Because copy number variants are common in normal individuals, determining the functional and clinical significance of rare copy number variants in patients remains challenging. The adoption of whole-genome chromosomal microarray analysis as a first-tier diagnostic test for individuals with unexplained developmental disabilities provides a unique opportunity to obtain large copy number variant datasets generated through routine patient care. Methods: A consortium of diagnostic laboratories was established (the International Standards for Cytogenomic Arrays consortium) to share copy number variant and phenotypic data in a central, public database. We present the largest copy number variant case-control study to date comprising 15,749 International Standards for Cytogenomic Arrays cases and 10,118 published controls, focusing our initial analysis on recurrent deletions and duplications involving 14 copy number variant regions. Results: Compared with controls, 14 deletions and seven duplications were significantly overrepresented in cases, providing a clinical diagnosis as pathogenic. Conclusion: Given the rapid expansion of clinical chromosomal microarray analysis testing, very large datasets will be available to determine the functional significance of increasingly rare copy number variants. This data will provide an evidence-based guide to clinicians across many disciplines involved in the diagnosis, management, and care of these patients and their families. Genet Med 2011:13(9):777-784.

  • 出版日期2011-9