中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (27): 4049-4054.doi: 10.3969/j.issn.2095-4344.2016.27.014

• 心脏及血管损伤动物模型 Animal models of heart and vascular damage • 上一篇    下一篇

生黄合剂对缺血再灌注模型大鼠心肌细胞凋亡及相关基因bax、bcl-2 mRNA的影响

陈  龙,田焕娜,高玉峰   

  1. 承德医学院,河北省承德市  067000
  • 修回日期:2016-04-16 出版日期:2016-06-30 发布日期:2016-06-30
  • 作者简介:陈龙,男,1977年生,河北省承德市人,满族,2001年承德医学院毕业,硕士,讲师,主要从事中药抗衰老方面的研究。

Influence of Sheng-Huang mixture on cardiocyte apoptosis and bax and bcl-2 mRNA expression in a rat model of ischemia-reperfusion injury

Chen Long, Tian Huan-na, Gao Yu-feng   

  1. Chengde Medical College, Chengde 067000, Hebei Province, China
  • Revised:2016-04-16 Online:2016-06-30 Published:2016-06-30
  • About author:Chen Long, Master, Lecturer, Chengde Medical College, Chengde 067000, Hebei Province, China

摘要:

文章快速阅读:

文题释义:
心肌缺血再灌注损伤:
指心肌组织在遭受缺血、缺氧性损伤一定时间后恢复血液灌流,不仅不能使心肌组织功能恢复,反而使缺血心肌发生比再灌注前更严重的损伤。虽然早期恢复血液灌注是减轻心肌组织缺血性损伤的一种重要手段,但由于血流恢复再灌注后,中性粒细胞大量黏附、聚集并在心肌组织浸润,加上大量氧自由基的生成以及钙超载、高能磷酸化合物缺乏、内皮素的作用下,使心肌组织损伤更加严重。
细胞凋亡:为了维持内环境稳定,由基因控制的活体内个别细胞自主的有序的死亡。细胞凋亡在形态和生化特征上与细胞坏死都有不同,细胞凋亡不是一件被动的过程,而是主动过程,它涉及一系列基因的激活、表达以及调控等作用,它并不是病理条件下自体损伤的一种现象,而是为更好地适应生存环境而主动争取的一种死亡过程,在成熟细胞新旧交替、萎缩、老化、炎症等生理、病理过程中都发挥了不可替代的作用。

 

摘要
背景:
生黄合剂由中药生脉饮和黄芩茎叶总黄酮组成,已有研究表明其通过抗炎、调节免疫功能等对心肌缺血有保护作用,但对缺血再灌注损伤后心肌细胞凋亡的作用机制尚未阐明。
目的:探讨生黄合剂对缺血再灌注模型大鼠心肌细胞凋亡及相关基因bcl-2、bax mRNA表达的影响。
方法:将36只SD大鼠随机分为6组,即生黄合剂低、中、高剂量组、阳性药物对照组、空白组、模型组,每组6只,分别给药7 d后,建立心肌缺血再灌注损伤模型。用TUNEL法检测心肌细胞凋亡情况,RT-PCR法检测缺血再灌注区心肌bax、bcl-2 mRNA的表达。
结果与结论:①与模型组比较,生黄合剂治疗组bcl-2 mRNA表达显著升高(P < 0.05),bax mRNA表达显著降低(P < 0.05),使bcl-2/bax比值升高,心肌细胞凋亡指数明显降低(P < 0.05);②结果证实,生黄合剂对大鼠心肌组织缺血再灌注有保护作用,其机制可能是通过上调bcl-2 mRNA的表达、下调bax mRNA的表达,提高bcl-2/bax比值,从而起到抑制心肌细胞凋亡。

 

 

关键词: 实验动物, 心肺及血管损伤动物模型, 生黄合剂, 大鼠, 心肌缺血再灌注, 细胞凋亡, bcl-2基因, bax基因

Abstract:

BACKGROUND: Sheng-Huang mixture including Chinese medicine Shengmai Decoction and total flavonoids of stems and leaves of radix has been shown to resist inflammation, regulate immune function, and protect ischemic myocardial tissues. However, its effect on the apoptosis of cardiac muscle cells after ischemia/reperfusion injury remains unclear.
OBJECTIVE: To investigate the effects of Sheng-Huang mixture on cardiocyte apoptosis and bax and bcl-2 mRNA expression in rats with ischemia-reperfusion injury. 
METHODS: Thirty-six Sprague-Dawley rats were divided randomly into six groups: low-dose, moderate-dose and high-dose Sheng-Huang mixture, positive control, blank and model groups (n=6). After 7 days of administration, models of myocardial ischemia-reperfusion injury were established. TUNEL was used to detect myocardial apoptosis. RT-PCR was utilized to measure bax and bcl-2 mRNA expression in the ischemic and reperfusion region. 
RESULTS AND CONCLUSION: (1) The bcl-2 mRNA expression was significantly higher in the Sheng-Huang mixture group than in the model group (P < 0.05), but bax mRNA expression was significantly lower (P < 0.05). Thus, bcl-2/bax ratio increased. In addition, apoptosis index was more significantly decreased in the Sheng-Huang mixture group (P < 0.05). (2) Results demonstrated that Sheng-Huang mixture can protect rat myocardium against ischemia/reperfusion injury, and effectively increase the bcl-2/bax ratio and inhibit the apoptosis of cardiomyocytes, and the underlying mechanism is mediated by up-regulating bcl-2 mRNA expression and down-regulating bax mRNA expression.

 

 

Key words: Myocardial Ischemia, Apoptosis, Tissue Engineering

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