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It is associated with an overexpression of the anti-angiogenic sFLT1 protein, which originates from the placenta and serves as a clinical biomarker to predict PE. To analyze the impact of sFLT1 on placental function and fetal growth, we generated transgenic mice with placenta-specific human sFLT1 (hsFLT1) overexpression. Immunohistochemical, morphometrical, and molecular analyses of the placentas on 14.5 dpc and 18.5 dpc were performed with a focus on angiogenesis, nutrient transport, and inflammation. Additionally, fetal development upon placental hsFLT1 overexpression was investigated. Dams exhibited a mild increase in serum hsFLT1 levels upon placental hsFLT1 expression and revealed growth restriction of the fetuses in a sex-specific manner. Male FGR fetuses expressed higher amounts of placental hsFLT1 mRNA compared to females. FGR placentas displayed an altered morphology, hallmarked by an increase in the spongiotrophoblast layer and changes in labyrinthine vascularization. Further, FGR placentas showed a significant reduction in placental glycogen storage and nutrient transporter expression. Moreover, signs of hypoxia and inflammation were observed in FGR placentas. The transgenic spongiotrophoblast-specific hsFLT1 mouse line demonstrates that low hsFLT1 serum levels are sufficient to induce significant alterations in fetal and placental development in a sex-specific manner.<\/jats:p>","DOI":"10.3390\/ijms25042040","type":"journal-article","created":{"date-parts":[[2024,2,7]],"date-time":"2024-02-07T11:03:14Z","timestamp":1707303794000},"page":"2040","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Overexpression of Human sFLT1 in the Spongiotrophoblast Is Sufficient to Induce Placental Dysfunction and Fetal Growth Restriction in Transgenic Mice"],"prefix":"10.3390","volume":"25","author":[{"given":"Rebekka","family":"Vogtmann","sequence":"first","affiliation":[{"name":"Department of Gynecology and Obstetrics, University Hospital, 45147 Essen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-3404-2573","authenticated-orcid":false,"given":"Alina","family":"Riedel","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics, University Hospital, 45147 Essen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ivanka","family":"Sassmannshausen","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics, University Hospital, 45147 Essen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sarah","family":"Langer","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics, University Hospital, 45147 Essen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elisabeth","family":"K\u00fchnel-Terjung","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics, University Hospital, 45147 Essen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rainer","family":"Kimmig","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics, University Hospital, 45147 Essen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8272-0076","authenticated-orcid":false,"given":"Hubert","family":"Schorle","sequence":"additional","affiliation":[{"name":"Department of Developmental Pathology, Institute of Pathology, University Hospital Bonn, 53127 Bonn, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elke","family":"Winterhager","sequence":"additional","affiliation":[{"name":"EM Unit, Imaging Center Essen, University Hospital, 45147 Essen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9506-4581","authenticated-orcid":false,"given":"Alexandra","family":"Gellhaus","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics, University Hospital, 45147 Essen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,2,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1016\/j.preghy.2019.03.013","article-title":"Circulating soluble fms-like tyrosine kinase-1 is placentally derived in normal pregnancy: First in vivo evidence","volume":"16","author":"Cerdeira","year":"2019","journal-title":"Pregnancy Hypertens."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"MacDonald, T.M., Walker, S.P., Hannan, N.J., Tong, S., and Kaitu\u2019u-Lino, T.J. 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