当归多糖对糖尿病KK-Ay小鼠心肌细胞凋亡的影响
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篇名: | 当归多糖对糖尿病KK-Ay小鼠心肌细胞凋亡的影响 |
TITLE: | Effects of Angelica sinensis polysaccharide on the apoptosis of cardiomyocytes in diabetic KK-Ay mice |
摘要: | 目的 探讨当归多糖对糖尿病KK-Ay小鼠心肌细胞凋亡的影响。方法将KK-Ay小鼠随机分为模型组、二甲双胍组(200mg/kg)和当归多糖高、中、低剂量组(400、200、100mg/kg),C57BL/6J小鼠作为空白组,每组8只,各组小鼠每日灌胃相应药液或生理盐水1次,连续4周。末次给药后,检测小鼠的空腹血糖、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、胰岛素(INS)水平,心肌组织中B细胞淋巴瘤2(Bcl-2)、活化的胱天蛋白酶(cleaved-caspase-3)、凋亡信号调节激酶1(ASK1)、磷酸化氨基末端蛋白激酶(p-JNK)、磷酸化需肌醇酶1α(p-IRE1α)蛋白表达以及心肌细胞凋亡情况。结果与模型组比较,二甲双胍组和当归多糖中、高剂量组小鼠空腹血糖、TC、LDL-C含量和心肌细胞凋亡率以及p-JNK、p-IRE1α、ASK1、cleaved-caspase-3蛋白表达水平均显著降低,INS水平和Bcl-2蛋白表达水平均显著升高(P<0.05或P<0.01)。结论当归多糖可改善糖尿病KK-Ay小鼠的血糖和血脂水平,抑制心肌细胞凋亡,其机制可能与抑制IRE1/ASK1/JNK信号通路有关。 |
ABSTRACT: | OBJECTIVE To investigate the effects of Angelica sinensis polysaccharide on the apoptosis of cardiomyocytes in diabetic KK-Ay mice. METHODS KK-Ay mice were randomly divided into model group, metformin group (200 mg/kg) and A. sinensis polysaccharide high-dose, medium-dose and low-dose groups (400, 200 and 100 mg/kg); C57BL/6J mice were included in blank group, with 8 mice in each group. Each group was given relevant medicine intragastrically or normal saline, once a day, for consecutive 4 weeks. After the final administration, the levels of fasting glucose, total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C) and insulin (INS) were detected; the protein expressions of B-cell lymphoma 2 (Bcl-2), cleaved- caspase-3, apoptosis signal-regulated kinase 1 (ASK1), phosphorylated c-Jun N-terminal kinase (p-JNK), phosphorylated inositol- requiring enzyme 1α (p-IRE1α) in myocardium, and apoptosis in cardiomyocytes were also detected. RESULTS Compared with model group, the fasting glucose, TC and LDL-C content, apoptotic rate of cardiomyocyte, protein expressions of p-JNK and p- IRE1α, ASK1, cleaved-caspase-3 were significantly lower in the metformin group and A. sinensis polysaccharide medium-dose, high-dose groups; INS level and relative expression of Bcl-2 protein were significantly increased (P<0.05 or P<0.01). CONCLUSIONS A. sinensis polysaccharide can improve the levels of blood glucose and blood lipid and inhibit cardiomyocyte apoptosis in diabetic KK-Ay mice, and the mechanism may be related to the inhibition of IRE1/ASK1/JNK signaling pathway. |
期刊: | 2023年第34卷第10期 |
作者: | 崔阳阳;杨丽霞;米登海;魏瑞贤 |
AUTHORS: | CUI Yangyang,YANG Lixia,MI Denghai,WEI Ruixian |
关键字: | 当归多糖;糖尿病心肌病;KK-Ay小鼠;细胞凋亡;IRE1/ASK1/JNK信号通路 |
KEYWORDS: | Angelica sinensis polysaccharide; diabetic cardiomyopathy; KK-Ay mice; apoptosis; IRE1/ASK1/JNK signaling |
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