Validation and application of a novel integrated genetic screening method to a cohort of 1,112 men with idiopathic azoospermia or severe oligozoospermia.

Fiche publication

Date publication

août 2017

Journal

Human mutation

Auteurs

Membres identifiés du Cancéropôle Est :
Pr VIVILLE Stéphane

Tous les auteurs :
Oud MS, Ramos L, O'Bryan MK, McLachlan RI, Okutman Ö, Viville S, de Vries PF, Smeets DFCM, Lugtenberg D, Hehir-Kwa JY, Gilissen C, van de Vorst M, Vissers LELM, Hoischen A, Meijerink AM, Fleischer K, Veltman JA, Noordam MJ

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/28801929

Résumé

Microdeletions of the Y chromosome (YCMs), Klinefelter syndrome (47,XXY) and CFTR mutations are known genetic causes of severe male infertility, but the majority of cases remain idiopathic. Here we describe a novel method using single molecule Molecular Inversion Probes (smMIPs), to screen infertile men for mutations and copy number variations (CNVs) affecting known disease genes. We designed a set of 4,525 smMIPs targeting the coding regions of causal (n = 6) and candidate (n = 101) male infertility genes. After extensive validation, we screened 1,112 idiopathic infertile men with non-obstructive azoospermia or severe oligozoospermia. In addition to five chromosome YCMs and six other sex chromosomal anomalies, we identified 5 patients with rare recessive mutations in CFTR as well as a patient with a rare heterozygous frameshift mutation in SYCP3 that may be of clinical relevance. This results in a genetic diagnosis in 11-17 patients (1-1.5%), a yield that may increase significantly when more genes are confidently linked to male infertility. In conclusion, we developed a flexible and scalable method to reliably detect genetic causes of male infertility. The assay consolidates the detection of different types of genetic variation while increasing the diagnostic yield and detection precision at the same or lower price compared to currently used methods. This article is protected by copyright. All rights reserved.