ArticlebioRxiv : the preprint server for biology2026
CXCL12/CXCR4 Governs Lymphatic Valve Formation Through Flow Dependent AKT/FOXO1/FOXC2 Activation.
Article in bioRxiv : the preprint server for biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Background: Lymphatic valves are specialized structures within lymphatic vessels that ensure unidirectional lymph transport. Defective lymphatic valve formation is associated with lymphedema, a chronic disease characterized by impaired lymph drainage and the accumulation of protein-rich interstitial fluid. Lymphatic valves form during late embryonic stages in mice, with oscillatory shear stress implicated in regulating the molecular mechanisms which control lymphatic valve formation. However, the molecular mechanisms governing lymphatic valve formation remain incompletely understood. Although CXCR4 is regulated by shear stress in blood vessels, whether CXCL12/CXCR4 signaling regulates lymphatic valve formation and the underlying molecular mechanisms remain unknown. Methods: To investigate the roles of CXCR4 in the regulation of lymphatic valve development, we utilized lymphatic endothelial cell (LEC)-specific Results: LEC-specific loss of CXCR4 displayed impaired lymphatic valve development. Conclusions: Our findings reveal CXCL12/CXCR4 signaling acts as a critical regulator of lymphatic valve development. CXCL12/CXCR4 signaling integrates into the flow dependent AKT/FOXO1/FOXC2 signaling axis to coordinate lymphatic valve development and morphogenesis. Taken together, our study uncovers a previously unknown role of CXCL12/CXCR4 signaling pathway in the regulation of lymphatic valve development. Targeting CXCL12/CXCR4/AKT/FOXO1 axis may represent a promising therapeutic strategy for improving lymphatic valve development to improve lymphatic function for the treatment of lymphedema.
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