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中国临床药理学与治疗学 ›› 2022, Vol. 27 ›› Issue (8): 848-856.doi: 10.12092/j.issn.1009-2501.2022.08.002

• 基础研究 • 上一篇    下一篇

五味子乙素通过抑制心肌细胞凋亡减轻大鼠心肌缺血再灌注损伤的实验研究

华海燕1,严杰2,秦宇芬3   

  1. 1健康医学科,解放军联勤保障部队第九〇三医院,杭州 310013,浙江;2呼吸消化科,解放军联勤保障部队第九〇三医院,杭州 310013,浙江;3湖州市中医院药剂科,浙江省杭州市西湖区,湖州 313009,浙江

  • 收稿日期:2022-02-08 修回日期:2022-08-26 出版日期:2022-08-26 发布日期:2022-09-13
  • 通讯作者: 华海燕,女,硕士,研究方向:药学。 E-mail: shinyxiaoyu@163.com
  • 基金资助:
    湖州市科技技术局项目(2017GY44)

Experimental study of schisandrin B attenuates acute myocardial ischemia injury in rats by inhibiting cardiomyocyte apoptosis

HUA Haiyan1, YAN Jie2, QIN Yufen3   

  1. 1Department of Health Medicine, the 903rd Hospital of PLA Joint Logistic Support Force, Hangzhou 310013, Zhejiang, China; 2Department of Respiratory Gastroenterology, the 93rd Hospital of JOINT Logistic Support Force, Hangzhou 310013, Zhejiang, China; 3Department of Pharmacy, Huzhou Hospital of Traditional Chinese Medicine, Hangzhou 310013, Zhejiang, China
  • Received:2022-02-08 Revised:2022-08-26 Online:2022-08-26 Published:2022-09-13

摘要: 目的:探究五味子乙素(schisandrin B, Sch B)对心肌缺血再灌注损伤(myocardial ischemia reperfusion injury, MIRI)大鼠的保护效果及作用机制。方法:选取40只SD大鼠,大鼠随机分为Control组、MIRI组、MIRI+30 mg/kg Sch B(MIRI+L-Sch B)组和MIRI+60 mg/kg Sch B(MIRI+H-Sch B)组,每组10只,Sch B灌胃处理7 d。随后采用左前降支结扎进行MIRI造模,Control组大鼠仅进行假手术。造模完成后,记录再灌注120 min后的大鼠心脏的射血分数(EF)、缩短分数(FS)、左心室内压最大上升速率(+dp/dtmax)、左心室内压最大下降速率(-dp/dtmax)值。采集大鼠血清检测肌酸激酶同工酶(CK-MB)、乳酸脱氢酶(LDH)、心肌肌钙蛋白Ⅰ(cTnI)活性。分离大鼠心肌缺血组织,检测组织髓过氧化物酶(MPO)、丙二醛(MDA)、谷胱甘肽过氧化物(GSH-PX)水平,TTC、HE and TUNEL染色实验分别观察心肌梗死面积、心肌组织病理形态学变化和心肌细胞凋亡情况,Western blot检测大鼠心肌组织中cleaved caspase 3、B淋巴细胞瘤-2(Bcl-2)、Bcl-2关联X(Bax)蛋白表达情况。结果:L-Sch B预处理后,MIRI大鼠的EF、FS、-dp/dtmax以及GSH-PX水平显著上升(P<0.05或P<0.01),CK-MB、LDH、cTnI活性以及MDA水平显著降低(P<0.05或P<0.01),心肌梗死面积显著减少(P<0.01),心肌组织损伤得到改善(P<0.01),心肌细胞凋亡减少(P<0.05、P<0.01),cleaved caspase 3/caspase 3、Bax蛋白表达水平显著降低(P<0.05或P<0.01),Bcl-2蛋白表达水平显著升高(P<0.05或P<0.01);且MIRI+H-Sch B组大鼠+dp/dtmax值显著升高(P<0.05)、MPO水平显著降低(P<0.01),该结果具有剂量效应。 结论:Sch B预处理可减轻MIRI引起的大鼠心肌损伤,其作用机制通过抑制氧化应激反应,下调cleaved caspase 3、Bax蛋白表达和上调Bcl-2蛋白表达以抑制心肌细胞凋亡实现。

关键词: 五味子乙素, 心肌缺血再灌注损伤, 氧化应激, 细胞凋亡

Abstract: AIM: To explore the protective effect and mechanism of schisandrin B (Sch B) on myocardial ischemia-reperfusion injury (MIRI) in rats.  METHODS: Forty SD rats were randomly divided into control group, MIRI group,MIRI+30 mg/kg Sch B (MIRI+L-Sch B) group and MIRI+60 mg/kg Sch B (MIRI+H-Sch B) group, ten in each group, Sch B were intragastrically for 7 days. Ligation of the left anterior descending branch was used to establish MIRI model, control group rats only underwent sham operation. The ardiac function parameters of ejection fraction (EF), fractional shortening (FS), maximum rate of increase in left ventricular pressure (+dp/dtmax), maximum rate of decline in left ventricular pressure (-dp/dtmax) values were recorded after 120 min reperfusion. CK-MB, LDH, cTnI activities in serum were detected. MPO, MDA and GSH-Px in myocardial tissue were detected. TTC, HE and TUNEL staining were used to detect myocardial infarction area, histopathological changes and cardiomyocyte apoptosis. Western blot was used to detect cleaved caspase 3, Bcl-2 and Bax protein in myocardial tissue. RESULTS: After Sch B pretreatment, the values of EF, FS, -dp/dtmax and levels GSH-PX in MIRI rats significantly increased (P<0.05 or P<0.01), while the activities of CK-MB, LDH, cTnI and MDA were significantly decreased (P<0.05 or P<0.01), myocardial infarction area significantly reduced (P<0.01), myocardial tissue damage was improved (P<0.01), cardiomyocyte apoptosis also reduced (P<0.05, P<0.01), cleaved caspase 3/caspase 3, Bax protein expression levels were significantly decreased (P<0.05 or P<0.01), Bcl-2 protein expression levels were significantly increased (P<0.05 or P<0.01); MIRI+H-Sch B group rats +dp The /dtmax value was significantly increased (P<0.05), and the MPO level was significantly decreased (P<0.01), shows dose-dependent effect.CONCLUSION: Pretreatment of Sch B attenuated MIRI-induced myocardial injury in rats, and its mechanism may related to inhibition oxidative stress, decreased cleaved caspase 3, Bax protein expression and increased Bcl-2 protein expression to inhibit cardiomyocyte apoptosis.

Key words: schisandrin B, myocardial ischemia reperfusion injury, oxidative stress, apoptosis

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