{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T21:37:13Z","timestamp":1776980233306,"version":"3.51.4"},"reference-count":70,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2024,10,1]],"date-time":"2024-10-01T00:00:00Z","timestamp":1727740800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2024,10,1]],"date-time":"2024-10-01T00:00:00Z","timestamp":1727740800000},"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":["BMC Biol"],"abstract":"<jats:title>Abstract<\/jats:title><jats:sec>\n                <jats:title>Background<\/jats:title>\n                <jats:p>Abnormalities of <jats:italic>in utero<\/jats:italic> testis development are strongly associated with reproductive health conditions, including male infertility and testis cancer. In mouse testes, SOX9 and FGF9 support Sertoli cell development, while VEGF signalling is essential for the establishment of vasculature. The mitogen-activated protein kinase (MAPK) pathway is a major signalling cascade, essential for cell proliferation, differentiation and activation of <jats:italic>Sry<\/jats:italic> during primary sex-determination, but little is known about its function during fetal testis morphogenesis. We explored potential functions of MAPK signalling immediately after\u00a0the establishment of testis cords in embryonic day (E)12.5 <jats:italic>Oct4<\/jats:italic>-eGFP transgenic mouse testes cultured using a MEK1\/2 inhibitor.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>RNA sequencing in isolated gonadal somatic cells identified 116 and 114 differentially expressed genes after 24 and 72 h of MEK1\/2 inhibition, respectively. Ingenuity Pathway Analysis revealed an association of MEK1\/2 signalling with biological functions such as angiogenesis, vasculogenesis and cell migration. This included a failure to upregulate the master transcriptional regulators of vascular development, <jats:italic>Sox7<\/jats:italic> and <jats:italic>Sox17,<\/jats:italic> VEGF receptor genes<jats:italic>,<\/jats:italic> the cell adhesion factor gene <jats:italic>Cd31<\/jats:italic> and a range of other endothelial cell markers such as <jats:italic>Cdh5<\/jats:italic> (encoding\u00a0VE-cadherin) and gap junction genes <jats:italic>Gja4<\/jats:italic> and <jats:italic>Gja5<\/jats:italic>. In contrast, only a small number of Sertoli cell enriched genes were affected. Immunofluorescent analyses of control testes revealed that the MEK1\/2 downstream target, ERK1\/2 was phosphorylated in endothelial cells and Sertoli cells. Inhibition of MEK1\/2 eliminated pERK1\/2 in fetal testes, and CD31, VE-cadherin, SOX7 and SOX17 and endothelial cells were lost. Consistent with a role for VEGF in driving endothelial cell development in the testis, inhibition of VEGFR also abrogated pERK1\/2 and SOX7 and SOX17 expressing endothelial cells. Moreover, while Sertoli cell proliferation and localisation to the testis cord basement membrane was disrupted by inhibition of MEK1\/2, it was unaffected by VEGFR inhibition. Instead, inhibition of FGF signalling compromised Sertoli cell proliferation and localisation to the testis cord basement membrane.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Together, our data highlight an essential role for VEGF-dependent MEK1\/2 signalling in promoting vasculature and indicate that FGF signalling through MEK1\/2 regulates Sertoli cell organisation in the developing mouse testis.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12915-024-02003-y","type":"journal-article","created":{"date-parts":[[2024,10,1]],"date-time":"2024-10-01T16:01:51Z","timestamp":1727798511000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["VEGF-dependent testicular vascularisation involves MEK1\/2 signalling and the essential angiogenesis factors, SOX7 and SOX17"],"prefix":"10.1186","volume":"22","author":[{"given":"Rheannon O.","family":"Bl\u00fccher","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rachel S.","family":"Lim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Matthew E.","family":"Ritchie","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patrick S.","family":"Western","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,10,1]]},"reference":[{"issue":"1","key":"2003_CR1","doi-asserted-by":"publisher","first-page":"50","DOI":"10.4103\/1008-682X.122199","volume":"16","author":"K Svechnikov","year":"2014","unstructured":"Svechnikov K, Stukenborg JB, Savchuck I, S\u00f6der O. 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