{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T22:19:11Z","timestamp":1785190751718,"version":"3.55.0"},"reference-count":58,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T00:00:00Z","timestamp":1770854400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Science and Technology Council, Taiwan ROC","award":["106-2314-B-195-014"],"award-info":[{"award-number":["106-2314-B-195-014"]}]},{"name":"National Science and Technology Council, Taiwan ROC","award":["112-2314-B-195-027"],"award-info":[{"award-number":["112-2314-B-195-027"]}]},{"DOI":"10.13039\/501100004861","name":"MacKay Memorial Hospital","doi-asserted-by":"crossref","award":["107-09"],"award-info":[{"award-number":["107-09"]}],"id":[{"id":"10.13039\/501100004861","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100004861","name":"MacKay Memorial Hospital","doi-asserted-by":"crossref","award":["113-121"],"award-info":[{"award-number":["113-121"]}],"id":[{"id":"10.13039\/501100004861","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>In vitro maturation (IVM) of mammalian oocytes is an essential fertility option for patients at risk of ovarian hyperstimulation syndrome or needing urgent fertility preservation. However, poor outcomes indicate a limited understanding of the molecular mechanisms behind cumulus cell expansion and extracellular matrix (ECM) remodeling. This study investigated the role of serum-derived urokinase-type plasminogen activator (PLAU) in mouse oocyte IVM. Immature cumulus\u2013oocyte complexes from CD-1 mice were cultured with or without serum, and PLAU activity was blocked using 4-chlorophenylguanidine hydrochloride. Cumulus expansion, oocyte maturation, and cumulus cell transcriptomes were analyzed. Serum supplementation enhanced cumulus expansion and maturation, while absence of serum or PLAU inhibition hindered both processes. External PLAU partially rescued these issues under serum-free conditions. Transcriptome analysis demonstrated that inhibiting PLAU activity reduces the expression of ovulation- and metabolism-related genes, such as those involved in glycolysis and carbohydrate metabolism, while increasing genes related to vesicle-mediated transport. PLAU is crucial for cumulus expansion and metabolic regulation during IVM, affecting ECM remodeling and oocyte quality. Supporting IVM culture media with proteolytic and metabolic factors could improve outcomes in assisted reproduction.<\/jats:p>","DOI":"10.3390\/ijms27041781","type":"journal-article","created":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T15:28:11Z","timestamp":1770910091000},"page":"1781","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Transcriptomic Profiling Reveals Urokinase-Type Plasminogen Activator-Mediated Regulation of Metabolic Competence and Cumulus Expansion During Mouse Oocyte In Vitro Maturation"],"prefix":"10.3390","volume":"27","author":[{"given":"Ling-Yu","family":"Yeh","sequence":"first","affiliation":[{"name":"Department of Medical Research, MacKay Memorial Hospital, New Taipei 251, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-7052-2805","authenticated-orcid":false,"given":"Christine Shan-Chi","family":"Chiu","sequence":"additional","affiliation":[{"name":"Department of Medical Research, MacKay Memorial Hospital, New Taipei 251, Taiwan"},{"name":"Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei 104, Taiwan"},{"name":"Graduate Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei 100, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kuan-Sheng","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei 104, Taiwan"},{"name":"Department of Medicine, MacKay Medical University, New Taipei 252, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert Kuo-Kuang","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Medical Research, MacKay Memorial Hospital, New Taipei 251, Taiwan"},{"name":"Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei 104, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ming-Huei","family":"Lin","sequence":"additional","affiliation":[{"name":"Department of Medical Research, MacKay Memorial Hospital, New Taipei 251, Taiwan"},{"name":"Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei 104, Taiwan"},{"name":"Department of Medicine, MacKay Medical University, New Taipei 252, Taiwan"},{"name":"MacKay Junior College of Medicine, Nursing, and Management, Taipei 112, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuh-Ming","family":"Hwu","sequence":"additional","affiliation":[{"name":"Taipei Fertility Centre, Taipei 110, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0549-3516","authenticated-orcid":false,"given":"Sheng-Hsiang","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Medical Research, MacKay Memorial Hospital, New Taipei 251, Taiwan"},{"name":"Department of Chemical Engineering & Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,2,12]]},"reference":[{"key":"ref_1","unstructured":"Practice Committees of the American Society for Reproductive Medicine, the Society of Reproductive Biologists and Technologists, and and the Society for Assisted Reproductive Technology (2021). 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