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鬼针草总黄酮对HepG2细胞胰岛素抵抗的影响
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| 篇名： | 鬼针草总黄酮对HepG2细胞胰岛素抵抗的影响 |
| TITLE： | Effects of total flavonoids of Bidens pilosa on insulin resistance in HepG 2 cells |
| 摘要： | 目的 探究鬼针草总黄酮（TFB）对人肝癌HepG2细胞胰岛素抵抗（IR）的影响。方法取鬼针草，用80％乙醇回流提取，制得TFB。利用棕榈酸体外诱导HepG2细胞复制IR模型，考察低、中、高质量浓度（20、40、80mg/L）TFB对细胞葡萄糖消耗量的影响；以二甲双胍为阳性对照，考察低、中、高质量浓度（20、40、80mg/L）TFB对细胞中胰岛素受体底物1（IRS-1）、c-Jun氨基端激酶（JNK）和蛋白激酶C（PKC）表达的影响。采用分子对接技术探讨槲皮素、槲皮苷等8个TFB主要活性成分与IRS-1、JNK、PKC蛋白的相互作用。结果TFB低、中、高质量浓度组细胞的葡萄糖消耗量均较模型组显著升高（P＜0.05或P＜0.01）。与正常组比较，模型组细胞中的IRS-1、JNK蛋白的表达量均显著降低，PKC蛋白的表达量显著升高（P＜0.01）；与模型组比较，TFB低、中、高质量浓度组和二甲双胍阳性对照组能上调IRS-1、JNK蛋白的表达并下调PKC蛋白的表达（P＜0.05或P＜0.01）。TFB中的海生菊苷与IRS-1蛋白的分子对接能量打分值为－7.9kcal/mol（1kcal＝4.816kJ），海生菊苷、芦丁与JNK蛋白的分子对接能量打分值均为－9.3kcal/mol，槲皮苷与PKC蛋白的分子对接能量打分值为－4.9kcal/mol，成分与蛋白间的相互作用包括形成氢键、疏水键等。结论TFB对HepG2细胞IR有显著的改善作用，其机制可能与调节IRS、JNK、PKC蛋白的表达有关；海生菊苷、芦丁和槲皮苷可能是改善IR的潜在活性成分。 |
| ABSTRACT： | OBJECTI VE To explore the effects of total flavonoids of Bidens polisa L.（TFB）on insulin resistance （IR）of HepG2 cells. METHODS B. polisa L. was refluxed and extracted with 80％ ethanol to obtain TFB. Palmitic acid was used to induce IR mode of HepG 2 cells in vitro . The effects of low-concentration ，medium-concentration and high-concentration （20，40， 80 mg/L） of TFB on the consumption of glucose were investigated. Using metformin as positive control ，the effects of low-concentration，medium-concentration and high-concentration （20，40，80 mg/L）of TFB on the protein expression of insulin receptor substrate- 1（IRS-1），c-Jun N-terminal kinase （JNK）and protein kinase C （PKC）were investigated. Molecular docking technology was used to explore the interaction between eight main active components of TFB such as quercetin ，quercitrin and IRS-1，JNK and PKC proteins. RESULTS The glucose consumption of TFB low-concentration ，medium-concentration and high-concentration groups were increased significantly （P＜0.05 or P＜0.01）. Compared with normal group ，the expression of IRS-1 and JNK protein in the model group decreased significantly ，and the expression of PKC protein increased significantly （P＜ 0.01）. Compared with model group ，the protein expression of IRS- 1 and JNK could up-regulated while the protein expression of PKC down-regulated in TFB low-concentration ，medium-concentration and high-concentration groups and metformin positive control group （P＜0.05 or P＜0.01）. The score of molecular docking energy between maritimetin in TFB and IRS- 1 protein was －7.9 kcal/mol（1 kcal＝4.816 kJ）. The scores of molecular docking energy of maritimetin ，rutin and JNK protein were －9.3 kcal/mol. The score of molecular docking energy between quercitrin and PKC protein was －4.9 kcal/mol. Interactions between components and proteins included forming hydrogen bonds ，hydrophobic bonds and so on. CONCLUSIONS TFB can significantly improve IR of HepG 2 cells，the mechanism of which may be related to the regulation of protein expression of IRS ，JNK and PKC. Maritimetin，rutin and quercitrin may be potential active ingredients for improving IR. |
| 期刊： | 2022年第33卷第08期 |
| 作者： | 庞晓军，卢琳琳，黎东旺，赵一宇，刘国勇 |
| AUTHORS： | PANG Xiaojun，LU Linlin，LI Dongwang，ZHAO Yiyu，LIU Guoyong |
| 关键字： | 鬼针草总黄酮；人肝癌HepG2细胞；胰岛素抵抗；胰岛素受体底物1、c-Jun氨基端激酶；蛋白激酶C；分子对接 |
| KEYWORDS： | total flavones of Bidens polisa L.；human |
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