STAT3 在心脏β-上腺功能中的关键作用
Wenjun Zhang1, Xiuxia Qu2, Biyi Chen2
1From State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (W. Zhang, X.Q., Y.T., W.S.); Riley Heart Research Center, Herman B. Wells Center for Pediatric Research, Department of Pediatrics, Indianapolis, IN (W. Zhang, B.L., H.C., W. Zhu, L.Z., N.Y., D.L., L.X., Y.L., M.R., W.S.); Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City (B.C., L.-S.S.); Department of Physiology and Biophysics, Cornell University Weill Medical College, New York, NY (M.S., J.J.Z., X.-Y.H.); Department of Surgery, Indiana University School of Medicine, Indianapolis (M.W.); Department of Pharmacology, Harbin Medical University, Harbin, China (B.L.); Department of Heart Surgery, Xiangya 2nd Hospital, Central South University, Changsha, China (N.Y., L.X.); and Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis (X.-Y.F.). wenjun08@gmail.com wenzhang@iu.edu wnshou@gmail.com wshou@iu.edu.
信号转换器和转录3激活器 (STAT3) 对心脏β上腺素受体 (βAR) 信号传递至关重要. STAT3 调节心脏功能,应对压力,并防止病态重塑,突出其在心力衰竭中的作用.
科学领域:
- 心血管生物学
- 分子心脏病学
- 信号传输
背景情况:
- 贝塔上腺素受体 (βARs) 在心脏中具有双重作用,增强性能,但随着长时间的激活导致心力衰竭.
- 信号转换器和转录3激活器 (STAT3) 参与细胞因子信号传递,并在心脏衰竭中发生变化.
研究的目的:
- 研究STAT3在心脏βAR中介信号和功能的调节作用.
- 确定STAT3对心脏βAR刺激的适应性和不适应性反应的参与.
主要方法:
- 通过β-上腺激动剂对心肌细胞的STAT3激活进行研究.
- 使用心肌细胞受限的STAT3淘汰模型 (Stat3cKO) 来评估βAR功能.
- 在急性和慢性βAR刺激下分析心脏收缩反应,处理和细胞/组织重塑.
- 研究了STAT3的上游调节剂 (Gαs,Src激酶) 和下游转录标.
主要成果:
- 在心肌细胞中,β-上腺激动剂直接激活STAT3.
- 心肌细胞中STAT3的丧失会损害对βAR刺激和与心脏合的收缩反应.
- 在Stat3cKO心脏中,慢性βAR刺激会导致细胞缩,细胞死亡和纤维化.
- 在转录过程中,STAT3调节了β1AR,PKA和T型Ca2+通道等关键βAR通路组件.
结论:
- 在心脏βAR信号传递和功能中,STAT3发挥着基本作用.
- STAT3是心脏应激适应,病理重塑和心力衰竭发展的关键转录调节器.
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