Amino Acid Restriction Triggers Angiogenesis via GCN2/ATF4 Regulation of VEGF and H(2)S Production.
Amino Acid Restriction Triggers Angiogenesis via GCN2/ATF4 Regulation of VEGF and H(2)S Production.
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DOI:
10.1016/j.cell.2018.03.001
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发表时间:
2018-03-22
期刊:
影响因子:
64.5
通讯作者:
Mitchell JR
中科院分区:
文献类型:
--
作者:
Longchamp A;Mirabella T;Arduini A;MacArthur MR;Das A;Treviño-Villarreal JH;Hine C;Ben-Sahra I;Knudsen NH;Brace LE;Reynolds J;Mejia P;Tao M;Sharma G;Wang R;Corpataux JM;Haefliger JA;Ahn KH;Lee CH;Manning BD;Sinclair DA;Chen CS;Ozaki CK;Mitchell JR
Angiogenesis, the formation of new blood vessels by endothelial cells (EC), is an adaptive response to oxygen/nutrient deprivation orchestrated by vascular endothelial growth factor (VEGF) upon ischemia or exercise. Hypoxia is the best-understood trigger of VEGF expression via the transcription factor HIF1α. Nutrient deprivation is inseparable from hypoxia during ischemia, yet its role in angiogenesis is poorly characterized. Here, we identified sulfur amino acid restriction as a proangiogenic trigger, promoting increased VEGF expression, migration and sprouting in EC in vitro, and increased capillary density in mouse skeletal muscle in vivo, via the GCN2/ATF4 amino acid starvation response pathway independent of hypoxia or HIF1α. We also identified a requirement for cystathionine-γ-lyase in VEGF-dependent angiogenesis via increased hydrogen sulfide (H2S) production. H2S mediated its proangiogenic effects in part by inhibiting mitochondrial electron transport and oxidative phosphorylation, resulting in increased glucose uptake and glycolytic ATP production. Restricting dietary sulfur can trigger angiogenesis and improve vascular health
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