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Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2026,7,28]]},"abstract":"<jats:p>\n                    Reproductive aging in mice leads to estropause, characterized by estrous cycle irregularity and eventual cessation, yet its underlying mechanism remains unclear. Here, we present a comprehensive single-cell atlas of mouse ovaries across precisely defined reproductive stages\u2014from young (regular cycling) through the estropausal transition (regular vs. irregular cycling) to post-estropause (acyclic)\u2014and of ovary-specific senescent cells defined by high senescence-associated \u03b2-galactosidase activity. We mapped transcriptomic dynamics of ovarian aging and characterized the molecular features of ovarian senescent cells. Our analyses revealed that during the estropausal transition, irregularly cycling ovaries exhibited accelerated aging and cellular senescence features compared with regularly cycling counterparts, including increased transcriptional noise, altered conserved aging pathways such as oxidative phosphorylation and proteostasis, hormone dysregulation in granulosa cells, and elevated expression of the senescence marker\n                    <jats:italic toggle=\"yes\">Cdkn1a<\/jats:italic>\n                    and senescence-associated secretory phenotype factors. This atlas delineates the cellular and molecular hallmarks of mouse ovarian aging and ovary-specific senescent cells, providing a resource for understanding the mechanisms underlying the estropausal transition.\n                  <\/jats:p>","DOI":"10.1073\/pnas.2600323123","type":"journal-article","created":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T18:00:45Z","timestamp":1784656845000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":1,"title":["Single-cell atlas of the mouse ovary reveals molecular drivers of aging and senescence during the estropausal transition"],"prefix":"10.1073","volume":"123","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-9979-9014","authenticated-orcid":false,"given":"Xifan","family":"Wang","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/01esghr10","id-type":"ROR","asserted-by":"publisher"}],"name":"Department of Obstetrics and Gynecology, Columbia University Irving Medical 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