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中华危重症医学杂志(电子版) ›› 2021, Vol. 14 ›› Issue (06) : 466 -471. doi: 10.3877/cma.j.issn.1674-6880.2021.06.005

论著

3-乙酰基-11-酮-β乳香酸对大鼠脑缺血再灌注损伤的保护作用及其机制研究
张艳1, 王俊1, 严永兴1,(), 顾婧1, 魏颖楠1, 沈咏慧1   
  1. 1. 310009 杭州,杭州市第三人民医院神经内科
  • 收稿日期:2021-05-21 出版日期:2021-12-31
  • 通信作者: 严永兴
  • 基金资助:
    浙江省中医药科学研究基金项目(2019ZA094); 杭州市医药卫生科技计划项目(0020190465、A20200219)

Protective effect and mechanism of 3-acetyl-11-keto-β-boswellic acid on cerebral ischemia-reperfusion injury in rats

Yan Zhang1, Jun Wang1, Yongxing Yan1,(), Jing Gu1, Yingnan Wei1, Yonghui Shen1   

  1. 1. Department of Neurology, Hangzhou Third Hospital, Hangzhou 310009, China
  • Received:2021-05-21 Published:2021-12-31
  • Corresponding author: Yongxing Yan
引用本文:

张艳, 王俊, 严永兴, 顾婧, 魏颖楠, 沈咏慧. 3-乙酰基-11-酮-β乳香酸对大鼠脑缺血再灌注损伤的保护作用及其机制研究[J/OL]. 中华危重症医学杂志(电子版), 2021, 14(06): 466-471.

Yan Zhang, Jun Wang, Yongxing Yan, Jing Gu, Yingnan Wei, Yonghui Shen. Protective effect and mechanism of 3-acetyl-11-keto-β-boswellic acid on cerebral ischemia-reperfusion injury in rats[J/OL]. Chinese Journal of Critical Care Medicine(Electronic Edition), 2021, 14(06): 466-471.

目的

探讨乳香提取物3-乙酰基-11-酮-β-乳香酸(AKBA)对大鼠脑缺血再灌注损伤的保护作用及其机制。

方法

将80只大鼠分为假手术组、模型组、低剂量组及高剂量组,每组各20只大鼠。除假手术组外,其他三组采用改良线栓方法制备大鼠大脑中动脉缺血再灌注损伤模型,低剂量组在造模成功再灌注后60 min给予腹腔注射10 mg / kg的AKBA,高剂量组则给予20 mg / kg的AKBA。测定并计算各组大鼠脑梗死率及梗死区细胞凋亡率;采用转录实时荧光定量PCR检测微RNA-320(miRNA-320)和胰岛素样生长因子1(IGF-1)的信使RNA(mRNA)表达水平,采用Western-blotting测定脑组织IGF-1的蛋白表达情况。

结果

各组大鼠脑梗死率、细胞凋亡率、miRNA-320、IGF-1的mRNA及蛋白表达水平比较,差异均有统计学意义(F = 193.300、230.000、100.900、180.400、26.180,P均< 0.001)。进一步两两比较发现,与假手术组比较,模型组大鼠的细胞凋亡率、miRNA-320、IGF-1的mRNA及蛋白表达水平均显著升高(P均< 0.05);与模型组比较,低剂量组及高剂量组大鼠的脑梗死率、细胞凋亡率及miRNA-320表达水平均显著降低,IGF-1的mRNA及蛋白表达水平均显著升高(P均< 0.05)。

结论

AKBA对大鼠脑缺血再灌注损伤有明显的保护作用,其机制可能是通过抑制miRNA-320的表达水平及上调IGF-1的水平来减少神经细胞的凋亡。

Objective

To investigate the protective effect and mechanism of 3-acetyl-11-keto-β-boswellic acid (AKBA) on cerebral ischemia-reperfusion injury in rats.

Methods

A total of 80 rats were randomly divided into a sham operation group, a model group, a low-dose group and a high-dose group, with 20 rats in each group. Except for the sham operation group, a middle cerebral artery ischemia-reperfusion injury model was induced by a modified suture method in the other three groups. The rats in the low-dose group were given an intraperitoneal injection of 10 mg / kg AKBA at 60 min after successful reperfusion, while the rats in the high-dose group were given 20 mg / kg AKBA. The rates of cerebral infarction and apoptosis were measured and calculated in the four groups. The messenger RNA (mRNA) expression of microRNA-320(miRNA-320) and insulin-like growth factor-1 (IGF-1) was detected by reverse transcription real-time fluorescence quantitative PCR, and the protein expression of IGF-1 was measured by Western-blotting.

Results

The cerebral infarction rate, apoptosis rate, miRNA-320 mRNA, IGF-1 mRNA and IGF-1 protein among the four groups all showed significant differences (F = 193.300, 230.000, 100.900, 180.400, 26.180; all P < 0.001). Further pairwise comparison revealed that the apoptosis rate, miRNA-320 mRNA, IGF-1 mRNA and IGF-1 protein in the model group were much higher than those in the sham operation group (all P < 0.05). The rates of cerebral infarction and apoptosis and the expression of miRNA-320 mRNA were much lower, while the expression of IGF-1 mRNA and protein was much higher in the low-dose group and high-dose group than in the model group (all P < 0.05).

Conclusion

AKBA has an obvious protective effect on cerebral ischemia-reperfusion injury in rats, and it may be to reduce neuronal apoptosis by inhibiting miRNA-320 and up-regulating IGF-1.

图1 TTC染色下各组大鼠脑组织梗死情况(n = 5)注:TTC.氯化三苯基四氮唑;a图为各组大鼠脑组织梗死情况,正常组织呈红色,梗死组织呈白色;b图为各组大鼠脑梗死率的比较,与模型组比较,aP < 0.05
表1 各组大鼠脑组织细胞凋亡率的比较(%, ± s
图2 各组大鼠脑组织检测细胞凋亡表达情况(TUNEL染色 × 400)注:TUNEL.脱氧核苷酸末端转移酶介导的核苷酸缺口末端标记法;TUNEL染色后正常细胞核呈蓝色,阳性凋亡细胞核呈绿色;a图为假手术组,可见少许凋亡细胞;b图为模型组,可见大量阳性凋亡细胞;c ~ d图分别为低剂量组和高剂量组,可见阳性凋亡细胞数量明显下降
图3 各组大鼠脑组织中miRNA-320及IGF-1 mRNA表达水平的比较(n = 5)注:miRNA-320.微RNA-320;IGF-1.胰岛素样生长因子1;mRNA.信使RNA;GAPDH. 3-磷酸甘油醛脱氢酶;与假手术组比较,aP < 0.05;与模型组比较,bP < 0.05
图4 各组大鼠脑组织中IGF-1的蛋白表达情况(n = 5)注:IGF-1.胰岛素样生长因子1;GAPDH. 3-磷酸甘油醛脱氢酶;与假手术组比较,aP < 0.05;与模型组比较,bP < 0.05
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