Genomic analysis using high-resolution single-nucleotide polymorphism arrays reveals novel microdeletions associated with premature ovarian failure

Abstract

To analyze DNA from women with premature ovarian failure (POF) for genome-wide copy-number variations (CNVs), focusing on novel autosomal microdeletions. Case-control genetic association study. Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas. Of 89 POF patients, eight experienced primary amenorrhea and 81 exhibited secondary amenorrhea before age 40 years. Genomic DNA from peripheral blood samples was analyzed for CNVs using high-resolution single-nucleotide polymorphism (SNP) arrays. Identification of novel CNVs in 89 POF cases, using the Database of Genomic Variants as a control population. A total of 198 autosomal CNVs were detected by SNP arrays, ranging in size from 0.1 Mb to 3.4 Mb. These CNVs (>0.1 Mb) included 17 novel microduplications and seven novel microdeletions, six of which contained the coding regions 8q24.13, 10p15-p14, 10q23.31, 10q26.3, 15q25.2, and 18q21.32. Most of the novel CNVs were derived from autosomes rather than the X chromosome. The present pilot study revealed novel microdeletions/microduplications in women with POF. Two novel microdeletions caused haploinsufficiency for SYCE1 and CPEB1, genes known to cause ovarian failure in knockout mouse models. Chromosomal microarrays may be a useful adjunct to conventional karyotyping when evaluating genomic imbalances in women with POF.