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干细胞因子和cKIT在缺氧中调节内皮质糖解
Hayoung Jeong1,2, Ryul-I Kim1,2, Hyunwoo Koo2
1Department of Global Innovative Drug, Graduate School of Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.
Cardiovascular research
|March 20, 2024
概括
干细胞因子 (SCF) 和它的受体cKIT通过通过HIF-1α通路增加内皮细胞糖解来促进血管生成. 阻断这种途径可以减少缺氧模型中的病理性新血管化.
科学领域:
- 细胞生物学 细胞生物学
- 代谢调节 代谢调节 代谢调节
- 血管生物学 血管生物学
背景情况:
- 内皮细胞 (ECs) 通过血管新生形成新的血管系统,这种过程在缺氧条件下至关重要.
- 缺血组织中的EC依赖于糖溶解来满足血管生成的代谢需求.
- 血管新生和内皮代谢之间的分子联系正在积极调查中.
研究的目的:
- 研究干细胞因子 (SCF) 和其受体cKIT在低氧驱动血管生成期间调节内皮糖解中的作用.
- 阐明SCF/cKIT信号影响内皮代谢和血管生成的分子机制.
主要方法:
- 评估了SCF/cKIT刺激下低氧化的人类ECs的葡萄糖摄取,乳酸生产和糖解.
- 使用化学抑制剂来降低糖解和HIF-1α表达.
- 在氧气诱导视网膜病变 (OIR) 的小鼠模型中检查了SCF,cKIT,HIF-1α,GLUT1和糖解酶水平.
- 研究了阻断SCF/cKIT信号对OIR小鼠新血管化的影响.
主要成果:
- 在低氧条件下,SCF和cKIT在人体EC中信号增强葡萄糖吸收,乳酸生产和糖解.
- 这种信号通路通过Akt/ERK依赖的HIF-1α转化增加了GLUT1和糖解酶的表达.
- 抑制糖解和HIF-1α降低了SCF诱导的体外血管生成.
- 在OIR小鼠中,视网膜中SCF,cKIT,HIF-1α,GLUT1和糖解酶的增加,在新血管中表达升高.
- 阻断SCF/cKIT信号降低了OIR小鼠中的HIF-1α,GLUT1,糖解酶和病态新血管化.
结论:
- 在低氧条件下控制内皮质糖解,SCF和cKIT信号调节血管生成.
- SCF/cKIT/HIF-1α轴代表了低氧驱动的病态血管生成中的新型代谢调节途径.
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