Sáinz-Jaspeado, Miguel; Proulx, Steven T; Ring, Sarah; Richards, Mark; Martinsson, Pernilla; Li, Xiujuan; Claesson-Welsh, Lena; Ulvmar, Maria H; Jin, Yi (2024). VE-cadherin junction dynamics in initial lymphatic vessels promotes lymph node metastasis. Life science alliance, 7(3) EMBO Press 10.26508/lsa.202302168
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The endothelial junction component vascular endothelial (VE)-cadherin governs junctional dynamics in the blood and lymphatic vasculature. Here, we explored how lymphatic junction stability is modulated by elevated VEGFA signaling to facilitate metastasis to sentinel lymph nodes. Zippering of VE-cadherin junctions was established in dermal initial lymphatic vessels after VEGFA injection and in tumor-proximal lymphatics in mice. Shape analysis of pan-cellular VE-cadherin fragments revealed that junctional zippering was accompanied by accumulation of small round-shaped VE-cadherin fragments in the lymphatic endothelium. In mice expressing a mutant VEGFR2 lacking the Y949 phosphosite (Vegfr2 Y949F/Y949F ) required for activation of Src family kinases, zippering of lymphatic junctions persisted, whereas accumulation of small VE-cadherin fragments was suppressed. Moreover, tumor cell entry into initial lymphatic vessels and subsequent metastatic spread to lymph nodes was reduced in mutant mice compared with WT, after challenge with B16F10 melanoma or EO771 breast cancer. We conclude that VEGFA mediates zippering of VE-cadherin junctions in initial lymphatics. Zippering is accompanied by increased VE-cadherin fragmentation through VEGFA-induced Src kinase activation, correlating with tumor dissemination to sentinel lymph nodes.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > Pre-clinic Human Medicine > Theodor Kocher Institute |
UniBE Contributor: |
Proulx, Steven Thomas |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
2575-1077 |
Publisher: |
EMBO Press |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
27 Dec 2023 10:17 |
Last Modified: |
28 Dec 2023 15:47 |
Publisher DOI: |
10.26508/lsa.202302168 |
PubMed ID: |
38148112 |
BORIS DOI: |
10.48350/190799 |
URI: |
https://boris.unibe.ch/id/eprint/190799 |
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