促红细胞生成素对肝硬化大鼠心肌TGF-β1及ColⅠ基因表达的影响  

Effects of EPO on expression of TGF-β1 and ColⅠin myocardium of liver cirrhosis rats

作　　者：张蔚屏[1] 于影[1] 高琴[1] 郭晓磊[1] 关宿东[1] 

机构地区：[1]蚌埠医学院生理学教研室,安徽蚌埠233030

出　　处：《中国药理学通报》2015年第10期1398-1402,共5页Chinese Pharmacological Bulletin

基　　金：安徽省高等学校自然科学研究项目(KJ2015B058by);安徽省自然科学基金资助项目(No 1508085QH150)

摘　　要：目的观察肝硬化对大鼠心肌转化生长因子β1(transforming growth factor-β1,TGF-β1)及胶原Ⅰ(collagenⅠ,ColⅠ)基因表达的影响及促红细胞生成素的干预作用。方法清洁级SD大鼠36只,随机分为3组:正常对照组、肝硬化组及EPO干预组。在体测定各组心脏血流动力学指标,测血清乳酸脱氢酶(LDH)及肌酸激酶同工酶(CK-MB)水平,Masson染色法观察各组大鼠心肌胶原形成情况,RTPCR法检测各组心肌TGF-β1、ColⅠmRNA基因表达的变化。结果与正常对照组相比,肝硬化组大鼠左心室收缩和舒张功能下降,心肌酶增高,心肌胶原沉积明显增加,心肌TGF-β1及ColⅠ基因表达升高。与肝硬化组相比,EPO干预组大鼠心室收缩和舒张功能提高,心肌酶指标降低,心肌胶原沉积改善,心肌TGF-β1及ColⅠ基因表达降低。结论肝硬化能引起大鼠心肌结构和功能的改变,促进心肌间质纤维化的发生;EPO对肝硬化大鼠心肌损伤有一定的保护作用。Aim To observe the effects of liver cirrho-sis on the expression of transforming growth factor-β1 ( TGF-β1 ) and ColⅠin rat myocardium and interven-tion of erythropoietin ( EPO ) . Methods Thirty-six male Sprague-Dasley rats were randomly divided into three groups:control group, liver cirrhosis group and EPO group, then the cardic hemodynamic parameters in vivo and levels of serum lactate dehydrogenase ( LDH ) as well as creatine kinase isoenzyme ( CK-MB) were measured. With Masson′s trichrome stain, changes of collagen formation of myocardial tissue in different groups were observed. Also the mRNA ex-pressions of TGF-β1 and ColⅠin myocardium were de-tected by RT-PCR. Results In contrast to control group, rats in liver cirrhosis group showed a decline in systolic and diastolic function of left ventricule, rising myocardial enzyme, a distinct increase of cardiac colla-gen deposition, as well as an elevation of TGF-β1 and ColⅠmRNA expressions. In contrast to liver cirrhosis group, rats in EPO group demonstrated an improve-ment in systolic and diastolic function of left ventricule as well as in cardiac collagen deposition, and a de-crease in both myocardial enzyme and TGF-β1 and ColⅠmRNA expressions. Conclusion Liver cirrhosis can lead to the changes of myocardial structure and function in rats,and it can accelerate myocardial inter-stitial fibrosis; EPO can protect the myocardial injury in liver cirrhosis rats.

关 键 词：肝硬化 心肌 EPO 胶原 心功能 TGF-Β1 

分 类 号：R-332[医药卫生] R322.11