PMID- 38092521 OWN - NLM STAT- MEDLINE DCOM- 20231228 LR - 20240104 IS - 1549-5477 (Electronic) IS - 0890-9369 (Print) IS - 0890-9369 (Linking) VI - 37 IP - 21-24 DP - 2023 Dec 26 TI - The steroid hormone ADIOL promotes learning by reducing neural kynurenic acid levels. PG - 998-1016 LID - 10.1101/gad.350745.123 [doi] AB - Reductions in brain kynurenic acid levels, a neuroinhibitory metabolite, improve cognitive function in diverse organisms. Thus, modulation of kynurenic acid levels is thought to have therapeutic potential in a range of brain disorders. Here we report that the steroid 5-androstene 3beta, 17beta-diol (ADIOL) reduces kynurenic acid levels and promotes associative learning in Caenorhabditis elegans We identify the molecular mechanisms through which ADIOL links peripheral metabolic pathways to neural mechanisms of learning capacity. Moreover, we show that in aged animals, which normally experience rapid cognitive decline, ADIOL improves learning capacity. The molecular mechanisms that underlie the biosynthesis of ADIOL as well as those through which it promotes kynurenic acid reduction are conserved in mammals. Thus, rather than a minor intermediate in the production of sex steroids, ADIOL is an endogenous hormone that potently regulates learning capacity by causing reductions in neural kynurenic acid levels. CI - (c) 2023 Lemieux et al.; Published by Cold Spring Harbor Laboratory Press. FAU - Lemieux, George A AU - Lemieux GA AD - Department of Physiology, University of California, San Francisco, San Francisco, California 94143, USA. FAU - Yoo, Shinja AU - Yoo S AD - Department of Physiology, University of California, San Francisco, San Francisco, California 94143, USA. FAU - Lin, Lin AU - Lin L AD - Department of Physiology, University of California, San Francisco, San Francisco, California 94143, USA. FAU - Vohra, Mihir AU - Vohra M AD - Department of Physiology, University of California, San Francisco, San Francisco, California 94143, USA. FAU - Ashrafi, Kaveh AU - Ashrafi K AD - Department of Physiology, University of California, San Francisco, San Francisco, California 94143, USA kaveh.ashrafi@ucsf.edu. LA - eng GR - P40 OD010440/OD/NIH HHS/United States GR - R01 AG046400/AG/NIA NIH HHS/United States GR - RF1 AG068194/AG/NIA NIH HHS/United States GR - S10 OD026962/OD/NIH HHS/United States PT - Journal Article DEP - 20231226 PL - United States TA - Genes Dev JT - Genes & development JID - 8711660 RN - H030S2S85J (Kynurenic Acid) RN - 0 (Steroids) RN - 0 (Hormones) SB - IM MH - Animals MH - *Kynurenic Acid/pharmacology MH - *Steroids MH - Hormones MH - Mammals PMC - PMC10760639 OTO - NOTNLM OT - 5-androstenediol OT - estrogen receptor beta OT - kynurenic acid OT - kynurenine pathway OT - nuclear hormone receptor EDAT- 2023/12/14 00:42 MHDA- 2023/12/28 06:42 PMCR- 2023/11/01 CRDT- 2023/12/13 21:03 PHST- 2023/04/24 00:00 [received] PHST- 2023/11/22 00:00 [accepted] PHST- 2023/12/28 06:42 [medline] PHST- 2023/12/14 00:42 [pubmed] PHST- 2023/12/13 21:03 [entrez] PHST- 2023/11/01 00:00 [pmc-release] AID - gad.350745.123 [pii] AID - 10.1101/gad.350745.123 [doi] PST - epublish SO - Genes Dev. 2023 Dec 26;37(21-24):998-1016. doi: 10.1101/gad.350745.123.