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Chaube, Balkrishna; Citrin, Kathryn M; Sahraei, Mahnaz; Singh, Abhishek K; de Urturi, Diego Saenz; Ding, Wen; Pierce, Richard W; Raaisa, Raaisa; Cardone, Rebecca; Kibbey, Richard; Fernández-Hernando, Carlos; Suárez, Yajaira
Nature communications, 12/2023, Letnik: 14, Številka: 1Journal Article
Angiopoietin-like 4 (ANGPTL4) is known to regulate various cellular and systemic functions. However, its cell-specific role in endothelial cells (ECs) function and metabolic homeostasis remains to be elucidated. Here, using endothelial-specific Angptl4 knock-out mice (Angptl4 ), and transcriptomics and metabolic flux analysis, we demonstrate that ANGPTL4 is required for maintaining EC metabolic function vital for vascular permeability and angiogenesis. Knockdown of ANGPTL4 in ECs promotes lipase-mediated lipoprotein lipolysis, which results in increased fatty acid (FA) uptake and oxidation. This is also paralleled by a decrease in proper glucose utilization for angiogenic activation of ECs. Mice with endothelial-specific deletion of Angptl4 showed decreased pathological neovascularization with stable vessel structures characterized by increased pericyte coverage and reduced permeability. Together, our study denotes the role of endothelial-ANGPTL4 in regulating cellular metabolism and angiogenic functions of EC.
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