我们的网站为什么显示成这样?

可能因为您的浏览器不支持样式,您可以更新您的浏览器到最新版本,以获取对此功能的支持,访问下面的网站,获取关于浏览器的信息:

|本期目录/Table of Contents|

罗格列酮抑制内皮素诱发心肌肥大的研究(PDF)

《心脏杂志》[ISSN:1009-7236/CN:61-1268/R]

期数:
2007年第6期
页码:
638-641
栏目:
基础研究
出版日期:
2007-12-20

文章信息/Info

Title:
Inhibition of ET1 induced growthpromoting effects by Rosiglitazone in cultured rat cardiac myocytes
作者:
朱肖星1牛小麟1魏瑾1陈定章2朱萧玲3许琳4王文清5高登峰1郝广华1李高中1
1.西安交通大学二附院心内科,陕西 西安 710004;第四军医大学西京医院:2.超声科,3.麻醉科,陕西 西安 710032;4.广州军区总医院心内科,广东 广州 510010; 5.空军总院涉外病房,北京 100036
Author(s):
ZHU Xiao-xing1NIU Xiao-lin1WEI Jin1CHEN Ding-zhang2ZHU Xiao-ling3Xu lin4 WANG Wen-qing5Gao Deng-feng1 HAO Guang-hua1Li Gao-zhong1
1.Department of Cardiology,Second Hospital,Xi′an Jiaotong University,Xi′an 710004,Shaanxi,China
关键词:
内皮素-1罗格列酮蛋白激酶C过氧化物增殖物激活受体γ
Keywords:
endothelin-1 rosiglitazone protein kinase C peroxosomeproliferatoractirated receptor γ
分类号:
R685.3
DOI:
-
文献标识码:
A
摘要:
目的 研究罗格列酮(rosiglitazone, RSG)抑制内皮素(endothelin1,ET-1)诱发心肌肥大的作用及其机制。方法 在培养新生大鼠心肌细胞中,采用RSG(PPARγ激动剂)、GW9662(PPARγ抑制剂)和蛋白激酶C(Protein kinase C、PKC)通路的激动剂(佛波醇酯,PMA)和蛋白激酶C通路的阻断剂白屈菜季氨碱(chelerythrine、che)观察罗格列酮在ET-1和PMA诱导心肌蛋白质合成中的影响。结果 培养2 d后,对照组(DMEM)蛋白质含量为(291±13) mg/L,ET-1组和PMA组分别为(339±15 )mg/L和(329±14)mg/L,较对照组升高15%和13%(P<0.01) ;ET-1+10-7 mol/L RSG组、ET1+10-7 mol/L RS组+GW9662组、ET-1+che组、分别为(292±14) mg/L, (310±13)mg/L,( 291±17) mg/L;与ET-1组比较分别降低13%、8%、13%(P<0.01 ,P<0.05,P<0.01);PMA+10-7 mol/L RSG组的蛋白含量较PMA组降低10%(P<0.01)。PMA和ET-1促进心肌细胞蛋白质的合成,RSG和che分别抑制蛋白质合成,PPARγ的阻断剂GW9662减弱RSG的抑制作用。测定心肌细胞的3H亮氨酸掺入, RSG同样可以抑制ET-1和 PMA诱导的心肌细胞肥大,GW9662可以削弱RSG的抑制作用。结论 RSG抑制ET-1诱发的心肌肥大与PKC和过氧化物酶增值物激活受体γ(PPARγ)途径可能有一定关系。
Abstract:
AIM To investigate the inhibitory effects of Rosiglitazone (RSG) on ET1induced cardiac myocyte hyp ertrophy and the mechanism involved. METHODS We used the activator of PPARγ (RSG), the inhibitor of PPARγ (GW9662) and the inhibitor of protein kinase C (PKC) (chelerythrine, che) to influence the protein synthesis stimulated by chronic ET1 or PMA. RESULTS After two days′ culture, the intracellular protein content in cardiac myocytes was (291±13)mg/L in the control group, (339±15) mg/L in the ET1 group and (329±14)mg/L in the PMA group (P<0.01). ET1+10-7 mol/L+RSG group was (292±14) mg/L, ET1+ 10-7 mol/L+RSG + GW9662 group was (310±13)mg/L and ET1+che group was (291±17)mg/L. Compared with that in the ET group, the intracellular protein content in cardiac myocytes decreased 13%, 8% and 13% respectively(P<0.01, P<0.05, P<0.01) and compared with that in the PMA group, the intracellular protein content in cardiac myocytes of PMA+10-7 mol/L +RSG group decreased 10% (P<0.01). RSG inhibited the increasing effects of ET1 and PMAinduced the promotion of protein content and 3Hleucine incorporation on cardiac myocytes. GW9662 reduced the inhibitory effects of RSG on ET1induced hypertrophy in myocytes. CONCLUSION The inhibitory effects of RSG on ET1 induced hypertrophy in myocytes are partially associated with PKC and PPARγ pathway.

参考文献/References

[1] 朱肖星,梅其炳,刘莉,等. 内皮素1对新生大鼠心肌细胞的影响及机制[J]. 心脏杂志,2005,17(5):441-444.

[2] 齐颖新,牛小麟,赵忠良. 高血压对大鼠心肌PPARγ的表达水平及其意义[J].生物化学及生物物理进展,2004,31(10):941-946.

[3] 张峰,梅其炳,曹云新,等. 缺氧预适应通过蛋白激酶C途径上调心肌细胞促血管生成因子的表达[J]. 心脏杂志,2004,16(1):17-19.

[4] Endoh M,Fujita S, Yang HT,et al. Endothelin: receptor subtypes,signal transduction, regulation of Ca2+ transients and contractility in rabbit ventricular myocardium[J]. Life Sci, 1998,62(17):1485-1489.

[5] Hong SJ. Mechanism of endothelin1induced cytosolic Ca2+ mobility in cultured H9c2 myocardiac ventricular cells [J]. Cell signal,2002,14(10):811-817.

[6] 朱肖星,梅其炳,张峰,等. MN9202对离体大鼠胸主动脉的舒张作用及机制[J].心脏杂志,2004,16(5):421-422,426.

[7] 王剑波,梅其炳,赵德化. MN9202对L甲状腺素所致大鼠心肌肥厚的影响[J].第四军医大学学报, 2000,21(6):141-144.

[8] 朱肖星,牛小麟,魏瑾,等. 心肌细胞蛋白质合成与活力关系的研究[J]. 南方医科大学学报,2007,27(6):878-880.

[9] Ryan MJ, Didion SP, Mathur S, et al. PPARγ agonist rosiglitazone improves vascular function and lowers blood pressure in hypertensive transgenic mice[J]. Hypertension,2004,43(3):661-666

[10]Eto K,Ohya Y,Nakamura Y, et al. Comparative actions of insulin sensitizers on ion channels in vascular smooth muscle[J].Eur J Pharmacol,2001,423(1):1-7.

[11]Pelzer T, Jazbutyte V, AriasLoza PA, et al. Pioglitazonee reverses downregulation of cardiac PPARγ expression in Zucker diabetic fatty rats[J].Biochem Biophys Res Commun,2005,329(2):726-732.

[12]朱肖星,牛小麟,魏瑾,等. 罗格列酮对内皮素引起心肌细胞损伤的保护作用及机制[J]. 第四军医大学学报,2007,28(14):1317-1319.

备注/Memo

备注/Memo:
收稿日期:2006-11-21.通讯作者:牛小麟,教授,博导,主要从事心血管药理学研究 Email:niuxl@mail.xjtu.edu.cnj 王文清,教授,主要从事心血管内科研究Email:wwq6087@163.com 作者简介:朱肖星,博士Email:xx_zhu2003@yahoo.com.cn
更新日期/Last Update: