{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T05:32:38Z","timestamp":1789623158915,"version":"build-2803163510"},"reference-count":49,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T00:00:00Z","timestamp":1768435200000},"content-version":"vor","delay-in-days":14,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Watkins Endowment","award":["NIGMS"],"award-info":[{"award-number":["NIGMS"]}]},{"name":"Watkins Endowment","award":["R01GM115848"],"award-info":[{"award-number":["R01GM115848"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,1,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Elements such as iron, copper, and zinc play essential roles in the mammalian oocyte, egg, and embryo; however, among these metals, zinc plays unique regulatory roles. Temporal fluctuations in zinc concentrations drive reproductive milestones such as meiotic resumption, egg activation, and initiation of the mitotic cell cycle. Roles for zinc in late preimplantation embryo development have not been well characterized. Using a quantitative element approach we report the inorganic profiles of mouse embryos progressing through the late blastocyst stage. We find that blastocysts, like oocytes and eggs, and distinct to somatic cells, maintain higher levels of zinc than copper and iron. All three of these essential metals are more abundant in the inner cell mass, which contains the population of pluripotent stem cells that gives rise to the fetus, relative to the trophectoderm which gives rise to the placenta and extraembryonic tissues. To test whether zinc abundance was associated with mitotic progress and cell-fate lineage, we perturbed zinc homeostasis during blastocyst formation by artificially raising intracellular zinc concentrations with zinc pyrithione. This treatment during the morula-to-blastocyst transition, when cell-fate lineages emerge, resulted in an elevation of zinc in the inner cell mass. This treatment did not impact cell number but did increase expression of the pluripotency and epiblast marker, Nanog. These results demonstrate that the inorganic profiles of the late preimplantation embryo retain elemental hallmarks of earlier developmental stages, and perturbation of zinc levels alters pluripotency gene expression in the blastocyst.<\/jats:p>","DOI":"10.1093\/reprod\/xaaf014","type":"journal-article","created":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T09:01:47Z","timestamp":1768467707000},"source":"Crossref","is-referenced-by-count":2,"title":["Inorganic profiles of preimplantation embryos and the association of zinc with\n                    <i>Nanog<\/i>\n                    expression in the blastocyst"],"prefix":"10.1093","volume":"171","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5711-440X","authenticated-orcid":false,"given":"Julia L","family":"Balough","sequence":"first","affiliation":[{"name":"Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine , Pittsburgh, PA,","place":["United States"]},{"name":"Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University , Chicago, IL,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas V","family":"O\u2019Halloran","sequence":"additional","affiliation":[{"name":"Department Microbiology, Genetics and Immunology and Department of Chemistry, Michigan State University , East Lansing, MI,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3756-9394","authenticated-orcid":false,"given":"Francesca E","family":"Duncan","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University , Chicago, IL,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Teresa K","family":"Woodruff","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Michigan State University , East Lansing, MI,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,1,15]]},"reference":[{"key":"2026012811035034400_xaaf014-B1","doi-asserted-by":"publisher","first-page":"3327","DOI":"10.1007\/s00018-014-1630-3","article-title":"A close look at the mammalian blastocyst: epiblast and primitive endoderm formation","volume":"71","author":"Artus","year":"2014","journal-title":"Cellular and Molecular Life Sciences: CMLS"},{"key":"2026012811035034400_xaaf014-B2","doi-asserted-by":"publisher","first-page":"526","DOI":"10.1095\/biolreprod.110.086488","article-title":"Zinc requirement during meiosis I-meiosis II transition in mouse oocytes is independent of the MOS-MAPK pathway","volume":"84","author":"Bernhardt","year":"2011","journal-title":"Biology of Reproduction"},{"key":"2026012811035034400_xaaf014-B3","doi-asserted-by":"publisher","first-page":"114","DOI":"10.1095\/biolreprod.111.097253","article-title":"A zinc-dependent mechanism regulates meiotic progression in mammalian oocytes","volume":"86","author":"Bernhardt","year":"2012","journal-title":"Biology of Reproduction"},{"key":"2026012811035034400_xaaf014-B4","doi-asserted-by":"publisher","first-page":"17071","DOI":"10.1038\/cddiscovery.2017.71","article-title":"Zinc-finger proteins in health and disease","volume":"3","author":"Cassandri","year":"2017","journal-title":"Cell Death Discovery"},{"key":"2026012811035034400_xaaf014-B5","doi-asserted-by":"publisher","first-page":"20327","DOI":"10.1074\/jbc.C300134200","article-title":"Features of a Smad3 MH1-DNA complex. 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