特定于内皮的SIRT7向通过克鲁普尔样因子4脱乙烯化来改善肺高血压
Jin Zhang1,2, Chenzhong Xu1,2, Xiaolong Tang2
1Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Marshall Laboratory of Biomedical Engineering, School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, China.
赛尔图因7 (SIRT7) 缺乏会损害肺动脉内皮细胞 (PAEC) 在肺高血压 (PH) 中的功能. 通过向SIRT7/KLF4轴恢复SIRT7水平,为PH提供了一个潜在的治疗策略.
科学领域:
- 心血管研究研究心血管研究
- 分子生物学分子生物学
- 肺部医学 肺部医学
背景情况:
- 肺高血压 (PH) 是一种严重的血管疾病,死亡率高.
- 肺动脉内皮细胞 (PAECs) 对于感知环境线索至关重要,但功能障碍可能导致PH的血管重塑.
- 了解特定蛋白质如Sirtuin 7 (SIRT7) 在PAEC功能障碍中的作用,对于开发新疗法至关重要.
研究的目的:
- 调查Sirtuin 7 (SIRT7) 在与肺高血压 (PH) 相关的内皮功能障碍中的作用.
- 探索针对SIRT7/KLF4通路作为PH治疗策略的潜力.
主要方法:
- 在人类和小鼠PH样本中测量SIRT7水平.
- 利用生物信息分析,免疫沉和脱乙烯化试验来探索SIRT7-KLF4相互作用.
- 采用Sugen5416 + 诱导缺氧 (SuHx) 的PH小鼠模型和细胞培养来评估治疗干预措施.
主要成果:
- 在PH肺组织和PAEC中,SIRT7水平显著降低.
- 肺内皮特异性SIRT7衰竭在小鼠中恶化了PH表型.
- 确定了KLF4作为SIRT7的标;SIRT7 deacetylatedKLF4,抑制其降解并维持PAEC平衡.
- 在模型中,SIRT7的过度表达或与尼古丁胺胺 рибоoside的激活逆转了PH表型.
结论:
- SIRT7/KLF4轴对于维持肺动脉内皮细胞 (PAEC) 恒常状态至关重要.
- 针对SIRT7特别针对肺内皮,为肺高血压 (PH) 提供了一个有前途的治疗途径.
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