RT Journal Article T1 Evaluation of Male Fertility-Associated Loci in a European Population of Patients with Severe Spermatogenic Impairment. A1 Cerván-Martín, Miriam A1 Bossini-Castillo, Lara A1 Rivera-Egea, Rocío A1 Garrido, Nicolás A1 Luján, Saturnino A1 Romeu, Gema A1 Santos-Ribeiro, Samuel A1 Ivirma Group, A1 Lisbon Clinical Group, A1 Castilla, José A A1 Gonzalvo, M Carmen A1 Clavero, Ana A1 Vicente, F Javier A1 Guzmán-Jiménez, Andrea A1 Costa, Cláudia A1 Llinares-Burguet, Inés A1 Khantham, Chiranan A1 Burgos, Miguel A1 Barrionuevo, Francisco J A1 Jiménez, Rafael A1 Sánchez-Curbelo, Josvany A1 López-Rodrigo, Olga A1 Peraza, M Fernanda A1 Pereira-Caetano, Iris A1 Marques, Patricia I A1 Carvalho, Filipa A1 Barros, Alberto A1 Bassas, Lluís A1 Seixas, Susana A1 Gonçalves, João A1 Larriba, Sara A1 Lopes, Alexandra M A1 Palomino-Morales, Rogelio J A1 Carmona, F David K1 SNPs K1 genetic association analysis K1 impaired spermatogenesis K1 infertility K1 non-obstructive azoospermia K1 severe oligospermia AB Infertility is a growing concern in developed societies. Two extreme phenotypes of male infertility are non-obstructive azoospermia (NOA) and severe oligospermia (SO), which are characterized by severe spermatogenic failure (SpF). We designed a genetic association study comprising 725 Iberian infertile men as a consequence of SpF and 1058 unaffected controls to evaluate whether five single-nucleotide polymorphisms (SNPs), previously associated with reduced fertility in Hutterites, are also involved in the genetic susceptibility to idiopathic SpF and specific clinical entities. A significant difference in the allele frequencies of USP8-rs7174015 was observed under the recessive model between the NOA group and both the control group (p = 0.0226, OR = 1.33) and the SO group (p = 0.0048, OR = 1.78). Other genetic associations for EPSTI1-rs12870438 and PSAT1-rs7867029 with SO and between TUSC1-rs10966811 and testicular sperm extraction (TESE) success in the context of NOA were observed. In silico analysis of functional annotations demonstrated cis-eQTL effects of such SNPs likely due to the modification of binding motif sites for relevant transcription factors of the spermatogenic process. The findings reported here shed light on the molecular mechanisms leading to severe phenotypes of idiopathic male infertility, and may help to better understand the contribution of the common genetic variation to the development of these conditions. SN 2075-4426 YR 2020 FD 2020-12-29 LK https://hdl.handle.net/10668/26449 UL https://hdl.handle.net/10668/26449 LA en DS RISalud RD Apr 5, 2025