十子代平方影响小鼠MIN6细胞凋亡及MEK1/2、ERK1/2的表达

摘要

BACKGROUND:Apoptosis of islet cel s is closely related to the long-term hyperglycemia-and hyperlipemia-induced injuries. OBJECTIVE:To observe the effect of Shizidaiping formula on the apoptosis and insulin secretion in MIN6 cel s under the high glucose and lipid environment, and to explore the protective effect of Shizidaiping formula and the related apoptosis mechanism. METHODS:MIN6 cel s were divided into normal, model, melbine, low-, medium-and high-dose Shizidaiping formula groups. The cel activity was examined by cel counting kit-8, the insulin secretion was measured by ELISA, the rate of apoptosis was measured by Annexin V-FITC&PI and the expression levels of MEK1/2, ERK1/2 and p-ERK1/2 were examined by western blot assay. RESULTS AND CONCLUSION:Shizidaiping formula significantly improved MIN6 cel activity under high glucose and lipid condition (P<0.05), decreased early cel apoptosis, increased the level of insulin stimulated by low glucose in cel supernatant (P<0.05), and improved the expression levels of MEK1/2, ERK1/2 and p-ERK1/2 (P<0.05). These results suggest that Shizidaiping formula can protect islet cel s from hyperglycemia and hyperlipemia damage by improving the activity of MIN6 cel s, reducing the insulin secretion and inhibiting the apoptosis of pancreaticβcel s in MIN6 cel s.%背景：胰岛细胞渐进凋亡与长期高糖高脂损伤密切相关。　　目的：观察十子代平方对高糖高脂损伤的MIN6细胞凋亡和胰岛素分泌的作用，分析十子代平方对MIN6细胞的保护作用和凋亡相关机制。　　方法：细胞实验以MIN6细胞株作为实验对象，设正常组、模型组、二甲双胍组、十子代平方-高、十子代平方-中、十子代平方-低。CCK-8试剂盒检测十子代平方对MIN6细胞活性的影响；ELISA法检测其对胰岛素分泌的影响；Annexin V-FITC&PI 双染法检测其对凋亡的影响，Western Blotting法检测MEK1/2、ERK1/2和p-ERK1/2的表达水平。　　结果与结论：①十子代平方能显著改善MIN6细胞在高糖高脂损伤下的细胞活力(P<0.05)，减少细胞早期凋亡，增加高糖刺激后上清液中的胰岛素水平(P<0.05)，提高MEK1/2、ERK1/2和p-ERK1/2表达水平(P<0.05)；②结果说明，十子代平方能够提高高糖高脂损伤的胰岛MIN6细胞活力、减轻胰岛素分泌负荷、抑制MIN6细胞凋亡，从而保护MIN6细胞。