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斯塔基德林化物调节NOX2-ROS信号轴在压力过载引起的心力衰竭中
Shuang Lu1, Yueyang Liang1, Songru Yang1
1School of Traditional Chinese Medicine, SHUTCM, Shanghai 201203, China.
International journal of molecular sciences
|September 28, 2023
概括
稳二 (STA) 通过抑制NOX2-ROS通路,减少氧化应激并改善心力衰竭模型中的心脏功能来保护心脏.
科学领域:
- 心血管生物学 心血管生物学
- 药理学 药理学是指药理学的学科.
- 细胞生理学 细胞生理学
背景情况:
- 之前的研究表明,稳氨酸化物 (STA) 提供了对心脏重塑的保护.
- /卡尔莫杜林依赖蛋白激酶II (CaMKII) 途径参与其中,但STA的精确影响需要进一步调查.
- 尼古丁胺氨酸二核酸氧化酶2 (NOX2) 衍生反应性氧物种 (ROS) 被假设激活CaMKII,导致病态心脏重塑.
研究的目的:
- 研究NOX2-ROS信号轴在STA心脏保护作用中的作用.
- 阐明STA减轻心脏功能障碍的分子机制.
主要方法:
- 在小鼠中利用横向大动脉收缩 (TAC) 诱导的心力衰竭,新生小鼠心肌细胞中使用烯酸诱导的高,在成年小鼠心肌细胞和H9c2细胞中使用H2O2诱导的氧化应激.
- 通过心声学和组织学染色来评估心脏功能.
- 量化NOX2,ROS和激发 - 收缩合使用西式涂抹,免疫光和过时记录.
主要成果:
- 在TAC小鼠中,STA治疗缓解了ROS和ROS依赖心脏纤维化,改善了左心室射出分数并减少了缩.
- 在心力衰竭和心肌细胞缩模型中,STA抑制了NOX2表达和激活.
- 在氧化应激下,STA减轻了NOX2相关的细胞质Ca2+过载,增强了收缩性,并在心肌细胞中降低了Ca2+依赖调节蛋白表达 (CaMKII,瑞诺丁受体).
结论:
- STA对压力过载引起的心脏改造的心脏保护与NOX2-ROS信号级联的抑制有关.
- STA有效地准NOX2-ROS通路,以防止病态心脏重塑和功能障碍.
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