{"title":"Effect of branched chain amino acid on apoptosis of neurons after focal cerebral ischemia in rats","authors":"F. Yan, Peng Sun, Huishou Zhao, Chong Huang, Xiong Guo, Xiaomeng Zhang","doi":"10.3760/CMA.J.ISSN.1674-635X.2019.02.010","DOIUrl":null,"url":null,"abstract":"Objective \nTo investigate the regulatory effect of branched chain amino acids(BCAA) on the expression of apoptosis related proteins after cerebral ischemia reperfusion injury and the protective effects of BCAA on ischemic brain injury in rats. \n \n \nMethods \n40 male SD rats were randomly divided into normal diet group(n=20)and branched chain amino acid (BCAA) group(n=20)according to the random number table, and each group was randomly divided into control group (n=6), sham operation group (n=6) and model group (n=8) which used suture method to make ischemia reperfusion model. After modeling, modified Neurological Severity Scores (mNSS) was used to access the neurological impairment degree of 2, 6, 24, 48 and 72 h in each group. The expression of apoptosis related proteins (Cleaved, Bax/Bcl-2) after 72 h was detected by the method of immune protein imprinting (Caspase3) and compared between normal diet group and BCAA group. \n \n \nResults \nCompared with the normal diet rats, the mNSS of BCAA diet rats after modeling at 2, 6, 24, 48, 72 h decreased(11.35±2.78 vs. 7.15±2.41, P=0.019; 9.35±1.75 vs. 5.82±1.17, P=0.002; 6.11±1.16 vs. 4.39±1.46, P=0.048; 5.87±1.32 vs. 3.55±1.94, P=0.036; 4.98±2.24 vs. 2.09±1.33, P=0.022). The expression of cleaved caspase3 protein and the ratio of Bax/Bcl-2 decreased in BCAA group. \n \n \nConclusion \nBCAA can alleviate the apoptosis of rats after ischemia and reperfusion, reduce the damage of nerve function, and has a positive protective effect on ischemic brain injury. \n \n \nKey words: \nBranched chain amino acid; Cerebral ischemia reperfusion; Apoptosis","PeriodicalId":9877,"journal":{"name":"中华临床营养杂志","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"中华临床营养杂志","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.3760/CMA.J.ISSN.1674-635X.2019.02.010","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Nursing","Score":null,"Total":0}
引用次数: 0
Abstract
Objective
To investigate the regulatory effect of branched chain amino acids(BCAA) on the expression of apoptosis related proteins after cerebral ischemia reperfusion injury and the protective effects of BCAA on ischemic brain injury in rats.
Methods
40 male SD rats were randomly divided into normal diet group(n=20)and branched chain amino acid (BCAA) group(n=20)according to the random number table, and each group was randomly divided into control group (n=6), sham operation group (n=6) and model group (n=8) which used suture method to make ischemia reperfusion model. After modeling, modified Neurological Severity Scores (mNSS) was used to access the neurological impairment degree of 2, 6, 24, 48 and 72 h in each group. The expression of apoptosis related proteins (Cleaved, Bax/Bcl-2) after 72 h was detected by the method of immune protein imprinting (Caspase3) and compared between normal diet group and BCAA group.
Results
Compared with the normal diet rats, the mNSS of BCAA diet rats after modeling at 2, 6, 24, 48, 72 h decreased(11.35±2.78 vs. 7.15±2.41, P=0.019; 9.35±1.75 vs. 5.82±1.17, P=0.002; 6.11±1.16 vs. 4.39±1.46, P=0.048; 5.87±1.32 vs. 3.55±1.94, P=0.036; 4.98±2.24 vs. 2.09±1.33, P=0.022). The expression of cleaved caspase3 protein and the ratio of Bax/Bcl-2 decreased in BCAA group.
Conclusion
BCAA can alleviate the apoptosis of rats after ischemia and reperfusion, reduce the damage of nerve function, and has a positive protective effect on ischemic brain injury.
Key words:
Branched chain amino acid; Cerebral ischemia reperfusion; Apoptosis
目的探讨支链氨基酸(BCAA)对大鼠脑缺血再灌注损伤后凋亡相关蛋白表达的调控作用及对缺血性脑损伤的保护作用。方法将40只雄性SD大鼠按随机数字表法随机分为正常饮食组(n=20)和支链氨基酸(BCAA)组(n=20),每组随机分为对照组(n=6)、假手术组(n=6)和模型组(n=8),采用缝合法制作缺血再灌注模型。建模完成后,采用改良神经功能严重程度评分法(mNSS)计算各组在2、6、24、48、72 h时的神经功能损害程度。采用免疫蛋白印迹法(Caspase3)检测72 h后细胞凋亡相关蛋白(Cleaved、Bax/Bcl-2)的表达,并比较正常饮食组和BCAA组的差异。结果与正常饮食大鼠比较,造模后2、6、24、48、72 h BCAA饮食大鼠的mNSS降低(11.35±2.78∶7.15±2.41,P=0.019;9.35±1.75 vs. 5.82±1.17,P=0.002;6.11±1.16 vs. 4.39±1.46,P=0.048;5.87±1.32 vs. 3.55±1.94,P=0.036;(4.98±2.24∶2.09±1.33,P=0.022)。BCAA组caspase3裂解蛋白表达降低,Bax/Bcl-2比值降低。结论BCAA能减轻大鼠缺血再灌注后的细胞凋亡,减轻神经功能损伤,对缺血性脑损伤具有积极的保护作用。关键词:支链氨基酸;脑缺血再灌注;细胞凋亡