RT Journal Article T1 NOS1 mutations cause hypogonadotropic hypogonadism with sensory and cognitive deficits that can be reversed in infantile mice. A1 Chachlaki, Konstantina A1 Messina, Andrea A1 Delli, Virginia A1 Leysen, Valerie A1 Maurnyi, Csilla A1 Huber, Chieko A1 Ternier, Gaëtan A1 Skrapits, Katalin A1 Papadakis, Georgios A1 Shruti, Sonal A1 Kapanidou, Maria A1 Cheng, Xu A1 Acierno, James A1 Rademaker, Jesse A1 Rasika, Sowmyalakshmi A1 Quinton, Richard A1 Niedziela, Marek A1 L'Allemand, Dagmar A1 Pignatelli, Duarte A1 Dirlewander, Mirjam A1 Lang-Muritano, Mariarosaria A1 Kempf, Patrick A1 Catteau-Jonard, Sophie A1 Niederländer, Nicolas J A1 Ciofi, Philippe A1 Tena-Sempere, Manuel A1 Garthwaite, John A1 Storme, Laurent A1 Avan, Paul A1 Hrabovszky, Erik A1 Carleton, Alan A1 Santoni, Federico A1 Giacobini, Paolo A1 Pitteloud, Nelly A1 Prevot, Vincent K1 Mutant Proteins K1 Mutation K1 Nitric Oxide K1 Nitric Oxide Synthase Type I K1 Nitrites AB The nitric oxide (NO) signaling pathway in hypothalamic neurons plays a key role in the regulation of the secretion of gonadotropin-releasing hormone (GnRH), which is crucial for reproduction. We hypothesized that a disruption of neuronal NO synthase (NOS1) activity underlies some forms of hypogonadotropic hypogonadism. Whole-exome sequencing was performed on a cohort of 341 probands with congenital hypogonadotropic hypogonadism to identify ultrarare variants in NOS1. The activity of the identified NOS1 mutant proteins was assessed by their ability to promote nitrite and cGMP production in vitro. In addition, physiological and pharmacological characterization was carried out in a Nos1-deficient mouse model. We identified five heterozygous NOS1 loss-of-function mutations in six probands with congenital hypogonadotropic hypogonadism (2%), who displayed additional phenotypes including anosmia, hearing loss, and intellectual disability. NOS1 was found to be transiently expressed by GnRH neurons in the nose of both humans and mice, and Nos1 deficiency in mice resulted in dose-dependent defects in sexual maturation as well as in olfaction, hearing, and cognition. The pharmacological inhibition of NO production in postnatal mice revealed a critical time window during which Nos1 activity shaped minipuberty and sexual maturation. Inhaled NO treatment at minipuberty rescued both reproductive and behavioral phenotypes in Nos1-deficient mice. In summary, lack of NOS1 activity led to GnRH deficiency associated with sensory and intellectual comorbidities in humans and mice. NO treatment during minipuberty reversed deficits in sexual maturation, olfaction, and cognition in Nos1 mutant mice, suggesting a potential therapy for humans with NO deficiency. PB American Association for the Advancement of Science (AAAS) YR 2022 FD 2022-10-05 LK http://hdl.handle.net/10668/20031 UL http://hdl.handle.net/10668/20031 LA en NO Chachlaki K, Messina A, Delli V, Leysen V, Maurnyi C, Huber C, et al. NOS1 mutations cause hypogonadotropic hypogonadism with sensory and cognitive deficits that can be reversed in infantile mice. Sci Transl Med. 2022 Oct 5;14(665):eabh2369 NO This work has been supported bythe European Union Horizon 2020 research and innovation program no. 847941 miniNO (to K.C.,L.S., A.C., F.S. N.P., and V.P.), the European Research Council COST action BM1105 for the studyof GnRH deficiency (to N.P., V.P., P.G., R.Q., M.N., D.L.A., D.P., E.H., M.T.-S., and P.C.) and theproject no. 874741 HUGODECA (to P.G.), the Fondation pour la Recherche Médicale (EquipeFRM, DEQ20130326524 to V.P and SPE201803005208 to K.C.), the Agence Nationale de laRecherche (ANR-17-CE16-0015 to V.P. and P.C.), Inserm Cross-Cutting Scientific Program(HuDeCA to P.G.), the Swiss National Foundation grants 310030_173260 (to N.P.) and310030_185292 (to F.S.), Novartis Foundation (18O52 to F.S.), the Hungarian Brain ResearchProgram (2017-1.2.1-NKP-2017-00002 to E.H.), and Hungarian Scientific Research Fund(K128317 and K138137 to E.H. and PD134837 to K.S). DS RISalud RD Apr 8, 2025