{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,7]],"date-time":"2026-11-07T20:29:58Z","timestamp":1794083398023,"version":"4.8.0"},"reference-count":31,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2019,1,24]],"date-time":"2019-01-24T00:00:00Z","timestamp":1548288000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2019,1,24]],"date-time":"2019-01-24T00:00:00Z","timestamp":1548288000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Sci Rep"],"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Preeclampsia is a pregnancy-related hypertensive disorder accounting for 14% of global maternal deaths annually. Preeclampsia \u2014 maternal hypertension and proteinuria \u2014 is promoted by placental ischemia resulting from reduced uteroplacental perfusion. Here, we assess longitudinal changes in placental oxygenation during preeclampsia using spectral photoacoustic imaging. Spectral photoacoustic images were acquired of the placenta of normal pregnant (NP) and preeclamptic reduced uterine perfusion pressure (RUPP) Sprague Dawley rats on gestational days (GD) 14, 16, and 18, corresponding to mid- to late gestation (n\u2009=\u200910 per cohort). Two days after implementation of the RUPP surgical model, placental oxygen saturation decreased 12% in comparison with NP. Proteinuria was determined from a 24-hour urine collection prior to imaging on GD18. Blood pressure measurements were obtained on GD18 after imaging. Placental hypoxia in the RUPP was confirmed with histological staining for hypoxia-inducible factor (HIF)-1\u03b1, a cellular transcription regulator which responds to local oxygen levels. Using <jats:italic>in vivo<\/jats:italic>, longitudinal imaging methods we determined that the placenta in the reduced uterine perfusion pressure rat model of preeclampsia is hypoxic, and that this hypoxia is maintained through late gestation. Future work will utilize these methods to assess the impact of novel therapeutics on placental ischemia and the progression of preeclampsia.<\/jats:p>","DOI":"10.1038\/s41598-018-37310-2","type":"journal-article","created":{"date-parts":[[2019,1,24]],"date-time":"2019-01-24T11:05:12Z","timestamp":1548327912000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":67,"title":["Spectral photoacoustic imaging to estimate in vivo placental oxygenation during preeclampsia"],"prefix":"10.1038","volume":"9","author":[{"given":"Dylan J.","family":"Lawrence","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Megan E.","family":"Escott","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leann","family":"Myers","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Suttira","family":"Intapad","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sarah H.","family":"Lindsey","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0947-6892","authenticated-orcid":false,"given":"Carolyn L.","family":"Bayer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2019,1,24]]},"reference":[{"key":"37310_CR1","doi-asserted-by":"publisher","first-page":"E323","DOI":"10.1016\/s2214-109x(14)70227-x","volume":"2","author":"L Say","year":"2014","unstructured":"Say, L. et al. Global causes of maternal death: a WHO systematic analysis. Lancet Global Health 2, E323\u2013E333, https:\/\/doi.org\/10.1016\/s2214-109x(14)70227-x (2014).","journal-title":"Lancet Global Health"},{"key":"37310_CR2","doi-asserted-by":"publisher","first-page":"399","DOI":"10.1161\/hypertensionaha.108.123513","volume":"53","author":"JS Gilbert","year":"2009","unstructured":"Gilbert, J. S., Gilbert, S. A., Arany, M. & Granger, J. P. Hypertension produced by placental ischemia in pregnant rats is associated with increased soluble endoglin expression. Hypertension 53, 399\u2013403, https:\/\/doi.org\/10.1161\/hypertensionaha.108.123513 (2009).","journal-title":"Hypertension"},{"key":"37310_CR3","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-017-12685-w","volume":"7","author":"T Fujii","year":"2017","unstructured":"Fujii, T. et al. Enhanced HIF2 alpha expression during human trophoblast differentiation into syncytiotrophoblast suppresses transcription of placental growth factor. 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