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[1]刘明明,牛治鑫,周永忠,等.慢性心衰大鼠心肌细胞内三体蛋白和连接蛋白的表达变化[J].宁夏医科大学学报,2017,(11):1248-1251.[doi:10.16050/j.cnki.issn1674-6309.2017.11.003]
　LIU Mingming,NIU Zhixin,ZHOU Yongzhong,et al.Abnormal Intracellular Triandin and Junctin in Chronic Rat Heart Failure[J].Ningxia Medical University,2017,(11):1248-1251.[doi:10.16050/j.cnki.issn1674-6309.2017.11.003]
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《宁夏医科大学学报》[ISSN:1005-8486/CN:64-1029/R]

卷:
期数:
2017年11期
页码:
1248-1251
栏目:
论著
出版日期:
2017-11-30

文章信息/Info

Title:
Abnormal Intracellular Triandin and Junctin in Chronic Rat Heart Failure
作者:
刘明明; 牛治鑫; 周永忠; 胡淑婷
宁夏医科大学基础医学院生理学系，银川 750004
Author(s):
LIU Mingming; NIU Zhixin; ZHOU Yongzhong; HU Shuting
Department of Physiology，School of Basic Medical Science， Ningxia Medical University，Yinchuan 750004
关键词:
慢性心衰大鼠; 肌浆网; 三体蛋白; 连接蛋白
Keywords:
chronic heart failure;  sarcoplasmic reticulum; triandin;  junctin
分类号:
R341
DOI:
10.16050/j.cnki.issn1674-6309.2017.11.003
文献标志码:
A
摘要:
目的 观察慢性心衰大鼠心肌细胞三体蛋白和连接蛋白的表达变化，探讨三体蛋白和连接蛋白在大鼠慢性心 衰中的机制。方法 选取雄性SD大鼠30只，随机分为慢性心衰组和假手术组各15只。采用冠状动脉左前降支永久性 结扎制作心梗模型。运用激光-扫描共聚焦显微镜以及蛋白免疫印迹等实验方法，检测28d后的心肌细胞肌浆网膜 内钙离子的容量以及三体蛋白和连接蛋白的表达。结果 慢性心衰组大鼠左室舒张末期压力（LVEDP）（8.61± 2.14）mmHg低于假手术组（4.68±1.21）mmHg（P<0.01）；慢性心衰组大鼠左室收缩期最大上升速率（dp/dtmax ）（2350.18±172.44）mmHg·s-1低于假手术组（4677.65±230.64）mmHg·s-1（P<0.01）；慢性心衰组大鼠钙 瞬变峰值（ΔF/F0）（15.45±1.05）低于假手术组（54.72±2.12）（P<0.01）。慢性心衰组大鼠三体蛋白和连 接蛋白的表达低于假手术组（P<0.01）。结论 慢性心衰大鼠心肌细胞三体蛋白和连接蛋白表达降低、肌浆网对钙 离子的固摄能力减弱。
Abstract:
Objective To observe abnormal intracellular Triandin and Junctin in chronic rat heart failure （HF）. Methods Adult male SD rats were randomly received either myocardial infarction（MI ） or a sham procedure. The myocardial infarction model was made by the permanent ligation of the left anterior descending coronary artery. The sarcoplasmic reticulum（SR） Ca2+ content was investigated and the expression of Triandin and Junctin was assessed by using laser scanning confocal microscope and Western blot. Results There was a significant increase in the left ventricular end-diastolic pressure（LVEDP） in HF rats（8.61±2.14）mmHg compared with sham rats （ 4.68±1.21）mmHg（P<0.01）. There was a significant decrease in the maximal change of systolic pressure over time （dp/dtmax） in HF rats （2350.18±172.44）mmHg·s-1 compared with control rats （4677.65±230.64）mmHg·s-1（P<0.01）. SR Ca2+ content was dramatically reduced in HF myocytes（Δ F/F0=15.45±1.05） compared with sham myocytes（ΔF/F0=54.72±2.12）（P<0.01）. The expression of Triandin and Junctin was significantly reduced in HF rat compared with sham group. Conclusion Down -regulation of Triandin and Junctin may be contribute to HF.

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备注/Memo

备注/Memo:
收稿日期：2017-06-03
基金项目：国家自然科学基金（81260051，81760076）
作者简介：刘明明（1986-），男，在读硕士研究生，研究方向：心血管生理。E-mail： liumingming555@yeah.net
通信作者：胡淑婷，副教授，硕士研究生导师。 E-mail: hst7312@163.com
更新日期/Last Update: 1900-01-01