{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T23:23:21Z","timestamp":1791329001872,"version":"4.3.1"},"reference-count":49,"publisher":"The Company of Biologists","issue":"19","license":[{"start":{"date-parts":[[2020,9,5]],"date-time":"2020-09-05T00:00:00Z","timestamp":1599264000000},"content-version":"vor","delay-in-days":3262,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2011,10,1]]},"abstract":"<jats:p>Neuropilin 1 (NRP1) is a transmembrane glycoprotein that is essential for blood vessel development in vertebrates. Best known for its ability to bind members of the vascular endothelial growth factor (VEGF) and class 3 semaphorin families through its extracellular domain, it also has a highly conserved cytoplasmic domain, which terminates in a SEA motif that binds the PDZ protein synectin\/GIPC1\/NIP. Previous studies in zebrafish embryos and tissue culture models raised the possibility that the SEA motif of NRP1 is essential for angiogenesis. Here, we describe the generation of mice that express a form of NRP1 that lacks the cytoplasmic domain and, therefore, the SEA motif (Nrp1cyto\u0394\/\u0394 mice). Our analysis of pre- and perinatal vascular development revealed that vasculogenesis and angiogenesis proceed normally in these mutants, demonstrating that the membrane-anchored extracellular domain is sufficient for vessel growth. By contrast, the NRP1 cytoplasmic domain is required for normal arteriovenous patterning, because arteries and veins crossed each other at an abnormally high frequency in the Nrp1cyto\u0394\/\u0394 retina, as previously reported for mice with haploinsufficient expression of VEGF in neural progenitors. At crossing sites, the artery was positioned anteriorly to the vein, and both vessels were embedded in a shared collagen sleeve. In human eyes, similar arteriovenous crossings are risk factors for branch retinal vein occlusion (BRVO), an eye disease in which compression of the vein by the artery disrupts retinal blood flow, causing local tissue hypoxia and impairing vision. Nrp1cyto\u0394\/\u0394 mice may therefore provide a suitable genetic model to study the aetiology of BRVO.<\/jats:p>","DOI":"10.1242\/dev.070037","type":"journal-article","created":{"date-parts":[[2011,8,19]],"date-time":"2011-08-19T00:11:22Z","timestamp":1313712682000},"page":"4185-4191","source":"Crossref","is-referenced-by-count":106,"title":["The cytoplasmic domain of neuropilin 1 is dispensable for angiogenesis, but promotes the spatial separation of retinal arteries and veins"],"prefix":"10.1242","volume":"138","author":[{"given":"Alessandro","family":"Fantin","sequence":"first","affiliation":[{"name":"UCL Institute of Ophthalmology, University College London, 11-43 Bath Street, London EC1V 9EL, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Quenten","family":"Schwarz","sequence":"additional","affiliation":[{"name":"UCL Institute of Ophthalmology, University College London, 11-43 Bath Street, London EC1V 9EL, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kathryn","family":"Davidson","sequence":"additional","affiliation":[{"name":"UCL Institute of Ophthalmology, University College London, 11-43 Bath Street, London EC1V 9EL, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eduardo M.","family":"Normando","sequence":"additional","affiliation":[{"name":"UCL Institute of Ophthalmology, University College London, 11-43 Bath Street, London EC1V 9EL, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laura","family":"Denti","sequence":"additional","affiliation":[{"name":"UCL Institute of Ophthalmology, University College London, 11-43 Bath Street, London EC1V 9EL, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christiana","family":"Ruhrberg","sequence":"additional","affiliation":[{"name":"UCL Institute of Ophthalmology, University College London, 11-43 Bath Street, London EC1V 9EL, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"237","reference":[{"key":"2021042607010303000_R1","doi-asserted-by":"crossref","first-page":"821","DOI":"10.1189\/jlb.71.5.821","article-title":"Neutrophils from MMP-9- or neutrophil elastase-deficient mice show no defect in transendothelial migration under flow in vitro","volume":"71","author":"Allport","year":"2002","journal-title":"J. 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