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氧化Ca(2+) /卡尔莫杜林依赖的蛋白激酶II触发了心房动
Anil Purohit1, Adam G Rokita, Xiaoqun Guan
1Department of Internal Medicine, Division of Cardiovascular Medicine and Cardiovascular Research Center, Carver College of Medicine (A.P., A.G.R., X.G., B.C., O.M.K., Z.G., E.D.L., H.S., A.C.B., R.N.E.-A., P.D.S., R.M.W., L.-S.S., M.E.A.), Department of Obstetrics and Gynecology (B.Y.), and Department of Molecular Physiology and Biophysics (M.E.A.), University of Iowa, Iowa City; Institute of Pharmacology, Faculty of Medicine, University Duisburg-Essen, Essen, Germany, and Division of Experimental Cardiology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany (N.V., D.D.); Cardiology and Pneumology, German Heart Center, University Hospital Goettingen, Goettingen, Germany (S.N., T.S., L.S.M.); and Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX (N.L., X.H.T.W.).
氧化Ca2+/卡尔莫杜林依赖蛋白激酶II (CaMKII) 与心房 (AF) 有关. 减少氧化CaMKII可能为AF患者提供新的治疗方法.
科学领域:
- 心血管研究研究心血管研究
- 分子心脏病学分子心脏病学
- 生物化学 生物化学
背景情况:
- 心房动 (AF) 是一个重要的公共卫生问题,治疗选择有限.
- ангиотензин II 和活性氧物种 (ROS) 是已知的AF风险因素,但潜在的分子机制尚不清楚.
- 卡二+/卡尔莫杜林依赖蛋白激酶II (CaMKII) 是一种新发现的ROS激活的前节律信号.
研究的目的:
- 研究氧化CaMKIIδ在AF发展中的作用.
- 为了确定CaMKII是否作为ROS和AF之间的分子链接.
- 探索潜在的治疗策略,以氧化CaMKII作为AF预防的目标.
主要方法:
- 在AF患者心房组织中氧化CaMKII水平的比较与鼻节律患者.
- 在被输入血管新生II的小鼠中评估AF易感性.
- 使用具有改性CaMKIIδ氧化位点 (MM-VV) 的实验小鼠和过度表达甲酸硫化物减少酶A的转基因小鼠.
主要成果:
- 氧化CaMKII在AF患者的心房和接受血管新生素II治疗的小鼠中升高.
- ангиотензин II 输注增加了野生类型小鼠的 AF 敏感性.
- MM-VV CaMKIIδ敲进小鼠和甲胺硫化物减少酶A过度表达的小鼠对AF诱导表现出抵抗力.
结论:
- CaMKII 作为一个分子媒介,将增加的 ROS 与 AF 连接起来.
- 旨在减少氧化CaMKII的治疗干预措施可能有望预防或减轻AF.
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