7 documents found, page 1 of 1
Diverse monogenic subforms of human spermatogenic failure
Nagirnaja, Liina; Lopes, Alexandra M.; Charng, Wu-Lin; Miller, Brian; Stakaitis, Rytis; Golubickaite, Ieva; Stendahl, Alexandra; Luan, TianpengchengNon-obstructive azoospermia (NOA) is the most severe form of male infertility and typically incurable. Defining the genetic basis of NOA has proven chal lenging, and the most advanced classification of NOA subforms is not based on genetics, but simple description of testis histology. In this study, we exome sequenced over 1000 clinically diagnosed NOA cases and identified a plausible recessive Mendelian cause i...
A de novo paradigm for male infertility
Oud, M.S.; Smits, R.M.; Smith, H.E.; Mastrorosa, F.K.; Holt, G.S.; Houston, B.J.; de Vries, P.F.; Alobaidi, B.K.S.; Batty, L.E.; Ismail, H.De novo mutations are known to play a prominent role in sporadic disorders with reduced fitness. We hypothesize that de novo mutations play an important role in severe male infertility and explain a portion of the genetic causes of this understudied disorder. To test this hypothesis, we utilize trio-based exome sequencing in a cohort of 185 infertile males and their unaffected parents. Following a systematic an...
Actionable secondary findings following exome sequencing of 836 non-obstructive...
Kasak, Laura; Lillepea, Kristiina; Nagirnaja, Liina; Aston, Kenneth I.; Schlegel, Peter N.; Gonçalves, João; Carvalho, Filipa; Moreno-Mendoza, DanielStudy question: What is the load, distribution and added clinical value of secondary findings (SFs) identified in exome sequencing (ES) of patients with non-obstructive azoospermia (NOA)? Summary answer: One in 28 NOA cases carried an identifiable, medically actionable SF. What is known already: In addition to molecular diagnostics, ES allows assessment of clinically actionable disease-related gene variants tha...
Variants in GCNA, X-linked germ-cell genome integrity gene, identified in men w...
Hardy, Jimmaline J.; Wyrwoll, Margot J.; Mcfadden, William; Malcher, Agnieszka; Rotte, Nadja; Pollock, Nijole C.; Munyoki, Sarah; Veroli, Maria V.Male infertility impacts millions of couples yet, the etiology of primary infertility remains largely unknown. A critical element of successful spermatogenesis is maintenance of genome integrity. Here, we present a genomic study of spermatogenic failure (SPGF). Our initial analysis (n=176) did not reveal known gene-candidates but identifed a potentially signifcant single-nucleotide variant (SNV) in X-linked ger...
Disruption of human meiotic telomere complex genes TERB1, TERB2 and MAJIN in me...
Salas-Huetos, Albert; Tüttelmann, Frank; Wyrwoll, Margot J.; Kliesch, Sabine; Lopes, Alexandra M.; Gonçalves, João; Boyden, Steven E.; Wöste, MariusNon-obstructive azoospermia (NOA), the lack of spermatozoa in semen due to impaired spermatogenesis affects nearly 1% of men. In about half of cases, an underlying cause for NOA cannot be identified. This study aimed to identify novel variants associated with idiopathic NOA. We identified a nonconsanguineous family in which multiple sons displayed the NOA phenotype. We performed whole-exome sequencing in three ...
Bi-allelic Mutations in M1AP Are a Frequent Cause of Meiotic Arrest and Severel...
Wyrwoll, Margot J.; Temel, Şehime G.; Nagirnaja, Liina; Oud, Manon S.; Lopes, Alexandra M.; van der Heijden, Godfried W.; Heald, James S.; Rotte, NadjaMale infertility affects ∼7% of men, but its causes remain poorly understood. The most severe form is non-obstructive azoospermia (NOA), which is, in part, caused by an arrest at meiosis. So far, only a few validated disease-associated genes have been reported. To address this gap, we performed whole-exome sequencing in 58 men with unexplained meiotic arrest and identified the same homozygous frameshift variant...
Human spermatogenic failure purges deleterious mutation load from the autosomes...
Lopes, Alexandra; Aston, Kenneth I.; Thompson, Emma E; Carvalho, Filipa; Gonçalves, João; Huang, N.; Matthiesen, Rune; Noordam, Michiel J.Gonadal failure, along with early pregnancy loss and perinatal death, may be an important filter that limits the propagation of harmful mutations in the human population. We hypothesized that men with spermatogenic impairment, a disease with unknown genetic architecture and a common cause of male infertility, are enriched for rare deleterious mutations compared to men with normal spermatogenesis. After assaying...