摘要
目的:观察不同鼠龄大鼠心肌组织钙敏感受体(CaSR)的表达规律及与心肌缺氧-再灌注损伤的关系。方法:采用RT-PCR技术,检测不同情况下心肌组织CaSR的表达差异;Lagendorff离体心脏灌流的方法复制心脏缺氧-再灌注模型;用透射电镜观察心肌超微结构的变化。结果:大鼠出生后,心肌组织中CaSR的表达逐渐升高,1个月时达到高峰,2、3个月保持在出生水平,此后上升并维持在较高水平。大鼠心肌缺氧40 m in及再灌注1 h、2 h心肌组织CaSR的mRNA表达升高,再灌注3 h、4 h后降低;同时随再灌注时间延长,心肌超微结构损伤愈严重。结论:大鼠心肌组织存在钙敏感受体,其表达与月龄有一定关系,并可能参与心肌缺氧-再灌注损伤的发生。
AIM: To investigate the changes of expression of calcium - sensing receptor (CaSR) in the rat cardiac tissue at different age and its relation with anoxia - reperfusion (A/R) injury. METHODS : RT - PCR was used to detect the mRNA expression of CaSR. The A/R injury was remodeled in vitro, and the ultrastructure of cardiac tissue was observed under transmission electron microscope. RESULTS: The expression of CaSR mRNA in the rat cardiac tissue increased gradually after birth, and reached to its maximum in the 1 st month. In the 2nd to 3rd month, the expression were almost equal to that at birth and then increased again to a higher level. The expression level of CaSR mRNA increased more significantly than those in control groups after 40 min of anoxia and repeffusion of 1 h and 2 h, and decreased after 3 h and 4 h. Moreover, the longer the reperfusion time lasted, the more serious the changes of ultrastructure were observed. CONCLUSION: Our results demonstrate that the CaSR is expressed in the rat cardiac tissue. The mRNA expression of CaSR changes with age and is involved in the anoxia -repeffusion injury.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2006年第8期1506-1509,共4页
Chinese Journal of Pathophysiology
基金
国家自然科学基金资助项目(No.30370577No.30470688)
黑龙江省教育厅海外学人科研合作课题(No.1053HQ010)
关键词
大鼠
心肌
受体
钙敏感
再灌注损伤
Rats
Myocardium
Receptors, calcium - sensing
Reperfusion injury