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在偶发的动脉静脉形形中,内皮细胞的依赖KRAS的糖分重编程
Ruilin Wu1,2, Negar Khosraviani1,2, Ann Mansur1,3
1Department of Laboratory Medicine and Pathobiology, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
EMBO molecular medicine
|February 18, 2026
概括
身体KRAS突变通过增加糖解,特别是通过hexokinase-2 (HK2) 来驱动大脑动脉静脉形形 (bAVMs) 的血管生成. 抑制糖解或HK2抑制了bAVM的生长,提供了一个潜在的治疗标.
科学领域:
- 血管生物学 血管生物学
- 癌症新陈代谢 癌症新陈代谢
- 遗传学 是一个遗传学.
背景情况:
- 内皮细胞中的体质KRAS突变是偶发性脑动脉静脉形 (bAVMs) 的主要原因.
- 这些突变也导致额外动脉静脉形 (AVM).
研究的目的:
- 研究KRAS突变在内皮细胞代谢和AVM中的血管生成中的作用.
- 通过检查代谢重编程来确定零星AVM的潜在治疗点.
主要方法:
- 在内皮细胞中利用KRASG12V表达来研究血管生成.
- 使用RNA测序,蛋白质组学和单细胞RNA测序来分析分子变化.
- 研究了药理学糖解抑制和赫索金酶-2 (HK2) 倒置的作用.
- 在小鼠和人类bAVM样本中的验证结果,以及KRAS突变斑马鱼模型.
- 在患者衍生的bAVM细胞中测试了联合糖解和MEK抑制.
主要成果:
- KRASG12V表达增强了血管新生,葡萄糖吸收和糖解流.
- 鉴定出hexokinase-2 (HK2) 是关键的升高的甘油分解成分,在小鼠和人类bAVMs中升高调节.
- 在培养细胞中抑制糖解或HK2抑制发芽血管生成.
- 糖解抑制逆转了动脉静脉冲,并增强了斑马鱼的MEK抑制功效.
- 结合糖解和MEK抑制抑制了患者衍生的bAVM细胞中的血管生成.
结论:
- 由KRAS驱动的内皮代谢重编程,特别是通过HK2增加糖解,促进偶发性AVM中的血管生成.
- 向内皮细胞糖解对治疗偶发性AVM具有潜在的治疗脆弱性.
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