{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T16:13:22Z","timestamp":1753892002301,"version":"3.41.2"},"reference-count":31,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2022,11,28]],"date-time":"2022-11-28T00:00:00Z","timestamp":1669593600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Pharmacol."],"abstract":"<jats:p>The cytochromes P450 (CYPs) represent a large gene superfamily that plays an important role in the metabolism of both exogenous and endogenous compounds. We have reported that the testis-specific Y-encoded-like proteins (TSPYLs) are novel <jats:italic>CYP<\/jats:italic> gene transcriptional regulators. However, little is known of mechanism(s) by which TSPYLs regulate <jats:italic>CYP<\/jats:italic> expression or the functional consequences of that regulation. The <jats:italic>TSPYL<\/jats:italic> gene family includes six members, <jats:italic>TSPYL1<\/jats:italic> to <jats:italic>TSPYL6<\/jats:italic>. However, <jats:italic>TSPYL3<\/jats:italic> is a pseudogene, TSPYL5 is only known to regulates the expression of <jats:italic>CYP19A1<\/jats:italic>, and TSPYL6 is expressed exclusively in the testis. Therefore, TSPYL 1, 2 and 4 were included in the present study. To better understand how TSPYL1, 2, and 4 might influence CYP expression, we performed a series of pull-downs and mass spectrometric analyses. Panther pathway analysis of the 2272 pulled down proteins for all 3 TSPYL isoforms showed that the top five pathways were the Wnt signaling pathway, the Integrin signaling pathway, the Gonadotropin releasing hormone receptor pathway, the Angiogenesis pathway and Inflammation mediated by chemokines and cytokines. Specifically, we observed that 177 Wnt signaling pathway proteins were pulled down with the TSPYLs. Subsequent luciferase assays showed that <jats:italic>TSPYL1<\/jats:italic> knockdown had a greater effect on the activation of Wnt signaling than did <jats:italic>TSPYL2<\/jats:italic> or <jats:italic>TSPYL4<\/jats:italic> knockdown. Therefore, in subsequent experiments, we focused our attention on TSPYL1. HepaRG cell qRT-PCR showed that TSPYL1 regulated the expression of CYPs involved in cholesterol-metabolism such as CYP1B1 and CYP7A1. Furthermore, TSPYL1 and \u03b2-catenin regulated <jats:italic>CYP1B1<\/jats:italic> expression in opposite directions and TSPYL1 appeared to regulate <jats:italic>CYP1B1<\/jats:italic> expression by blocking \u03b2-catenin binding to the TCF7L2 transcription factor on the <jats:italic>CYP1B1<\/jats:italic> promoter. In \u03b2-catenin and TSPYL1 double knockdown cells, <jats:italic>CYP1B1<\/jats:italic> expression and the generation of CYP1B1 downstream metabolites such as 20-HETE could be restored. Finally, we observed that TSPYL1 expression was associated with plasma cholesterol levels and BMI during previous clinical studies of obesity. In conclusion, this series of experiments has revealed a novel mechanism for regulation of the expression of cholesterol-metabolizing CYPs, particularly CYP1B1, by TSPYL1 <jats:italic>via<\/jats:italic> Wnt\/\u03b2-catenin signaling, raising the possibility that TSPYL1 might represent a molecular target for influencing cholesterol homeostasis.<\/jats:p>","DOI":"10.3389\/fphar.2022.1047318","type":"journal-article","created":{"date-parts":[[2022,11,28]],"date-time":"2022-11-28T05:26:02Z","timestamp":1669613162000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Testis- specific Y-encoded- like protein 1 and cholesterol metabolism: Regulation of CYP1B1 expression through Wnt signaling"],"prefix":"10.3389","volume":"13","author":[{"given":"Xiujuan","family":"Zhu","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huanyao","family":"Gao","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sisi","family":"Qin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Duan","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Junmei","family":"Cairns","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yayun","family":"Gu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jia","family":"Yu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Richard M.","family":"Weinshilboum","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liewei","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2022,11,28]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"1138","DOI":"10.1124\/dmd.108.026179","article-title":"Inducibility of drug-metabolizing enzymes by xenobiotics in mice with liver-specific knockout of Ctnnb1","volume":"37","author":"Braeuning","year":"2009","journal-title":"Drug Metab. 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