{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T03:57:38Z","timestamp":1782791858125,"version":"3.54.5"},"reference-count":46,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2023,3,20]],"date-time":"2023-03-20T00:00:00Z","timestamp":1679270400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["R01 HL155259"],"award-info":[{"award-number":["R01 HL155259"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Nitric oxide (NO) is a gasotransmitter that avidly binds both free and heme-bound iron, forming relatively stable iron nitrosyl compounds (FeNOs). We have previously demonstrated that FeNOs are present in the human placenta and are elevated in preeclampsia and intrauterine growth restriction. The ability of NO to sequester iron raises the possibility of the NO-mediated disruption of iron homeostasis in the placenta. In this work, we tested whether exposure of placental syncytiotrophoblasts or villous tissue explants to sub-cytotoxic concentrations of NO would elicit the formation of FeNOs. Furthermore, we measured changes in the mRNA and protein expression levels of key iron regulatory genes in response to NO exposure. Ozone-based chemiluminescence was used to measure concentrations of NO and its metabolites. Our results showed a significant increase in FeNO levels in placental cells and explants treated with NO (p &lt; 0.0001). The mRNA and protein levels of HO-1 were significantly increased in both cultured syncytiotrophoblasts and villous tissue explants (p &lt; 0.01), and the mRNA levels of hepcidin and transferrin receptor were significantly increased in culture syncytiotrophoblasts and villous tissue explants, respectively, (p &lt; 0.01), while no changes were seen in the expression levels of divalent metal transporter-1 or ferroportin. These results suggest a potential role for NO in iron homeostasis in the human placenta and could be relevant for disorders of pregnancy such as fetal growth restriction and preeclampsia.<\/jats:p>","DOI":"10.3390\/ijms24065887","type":"journal-article","created":{"date-parts":[[2023,3,21]],"date-time":"2023-03-21T03:15:03Z","timestamp":1679368503000},"page":"5887","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Nitric Oxide Affects Heme Oxygenase-1, Hepcidin, and Transferrin Receptor Expression in the Placenta"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6834-1192","authenticated-orcid":false,"given":"Patricia","family":"Principe","sequence":"first","affiliation":[{"name":"Lawrence D. Longo Center for Perinatal Biology, Loma Linda University School of Medicine, 11175 Campus Street, Loma Linda, CA 92354, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"George T.","family":"Mukosera","sequence":"additional","affiliation":[{"name":"Lawrence D. Longo Center for Perinatal Biology, Loma Linda University School of Medicine, 11175 Campus Street, Loma Linda, CA 92354, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nikia","family":"Gray-Hutto","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Loma Linda University School of Medicine, 11370 Anderson Street, Loma Linda, CA 92354, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ashra","family":"Tugung","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Loma Linda University School of Medicine, 11370 Anderson Street, Loma Linda, CA 92354, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1918-3260","authenticated-orcid":false,"given":"Ciprian P.","family":"Gheorghe","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Loma Linda University School of Medicine, 11370 Anderson Street, Loma Linda, CA 92354, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arlin B.","family":"Blood","sequence":"additional","affiliation":[{"name":"Lawrence D. Longo Center for Perinatal Biology, Loma Linda University School of Medicine, 11175 Campus Street, Loma Linda, CA 92354, USA"},{"name":"Department of Pediatrics, Division of Neonatology, Loma Linda University School of Medicine, 11175 Campus Street, Loma Linda, CA 92354, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"625","DOI":"10.1172\/JCI127341","article-title":"Effects of maternal iron status on placental and fetal iron homeostasis","volume":"130","author":"Sangkhae","year":"2020","journal-title":"J. Clin. 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