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纸质出版日期:2017
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田春雨, 薄海美, 林飞武, 等. 双益方改善2型糖尿病模型大鼠胰岛素抵抗的药效及作用机制[J]. 中国实验方剂学杂志, 2017,23(22):137-142.
TIAN Chun-yu, BO Hai-mei, LIN Fei-wu, et al. Efficacy and Mechanism of Shuangyi Prescription in Improving Insulin Resistance in Type 2 Diabetes Model Rats[J]. Chinese journal of experimental traditional medical formulae, 2017, 23(22): 137-142.
田春雨, 薄海美, 林飞武, 等. 双益方改善2型糖尿病模型大鼠胰岛素抵抗的药效及作用机制[J]. 中国实验方剂学杂志, 2017,23(22):137-142. DOI: 10.13422/j.cnki.syfjx.2017220137.
TIAN Chun-yu, BO Hai-mei, LIN Fei-wu, et al. Efficacy and Mechanism of Shuangyi Prescription in Improving Insulin Resistance in Type 2 Diabetes Model Rats[J]. Chinese journal of experimental traditional medical formulae, 2017, 23(22): 137-142. DOI: 10.13422/j.cnki.syfjx.2017220137.
目的:进行双益方对2型糖尿病模型大鼠的药效作用实验,分析其作用机制。方法:采用高脂饲养加25 mg · kg-1剂量链脲佐菌素腹腔注射的方法建立2型糖尿病大鼠模型,将成模动物随机分为模型组,二甲双胍组[灌胃(ig),85 mg · kg-1],双益方高、中、低(ig,2 000,1 000,500 mg · kg-1)剂量组。进行双益方对2型糖尿病模型大鼠的体重,饮食量,饮水量,二便情况,血糖,糖耐量测定(oral glucose tolerance test,OGTT),糖化血红蛋白(hemoglobin A1c,HbA1c),糖化血清蛋白(glycosylated serum protein,GSP),胰岛素等指标的检测,蛋白免疫印迹法(Western blot)测定肝组织蛋白酪氨酸磷酸酶1B(protein tyrosine phosphatase 1B,PTP1B),蛋白激酶(Akt),磷酸化的蛋白激酶(p-Akt),糖原合成酶激酶-3β(glycogen synthase kinase-3β,GSK-3β),磷酸化的糖原合成酶激酶-3β(p-GSK-3β)的表达,Western blot测定骨骼肌组织胰岛素受体底物-1(insulin receptor substrate-1,IRS-1),磷酸化的胰岛素受体底物-1(p-IRS-1),葡萄糖转运蛋白4(glucose transporter 4,Glut4)表达的影响。结果:与模型组比较,双益方可降低2型糖尿病模型大鼠的空腹血糖(fasting blood glucose,FBG),HbAlc水平及胰岛素抵抗指数(Homa-IR),缓解2型糖尿病模型大鼠饮食量多、饮水量多、二便量大及体重减轻的状况(P<0.05,P<0.01),降低血清胰岛素、糖化血清蛋白、糖化血清蛋白及随机血糖(P<0.05,P<0.01),其中双益方高剂量组药效较好;双益方可显著升高2型糖 尿病模型大鼠骨骼肌p-IRS-1,Glut4的表达(P<0.01,P<0.05);双益方可显著升高2型糖尿病模型大鼠肝脏p-Akt的表达,显著降低PTP1B,p-GSK-3β的表达(P<0.01,P<0.05)。结论:双益方可有效调节2型糖尿病模型大鼠糖代谢紊乱,促进胰岛素分泌,改善胰岛素抵抗;调节骨骼肌PI3K/Akt,肝脏Akt/GSK-3β信号转导通路可能是该复方治疗2型糖尿病的作用机制。
Objective: To analyze the pharmacological effect and action mechanism of Shuangyi prescription (SYP) in the treatment of type 2 diabetes rats. Method: High fat diet plus 25 mg · kg-1 streptozotocin were intraperitoneally injected to establish type 2 diabetic rats model. The model animals were randomly divided into model group
metformin group (ig
85 mg · kg-1)
SYP high dose group (ig
2 000 mg · kg-1)
SYP middle dose group (ig
1 000 mg · kg-1)
and SYP low dose group (ig
500 mg · kg-1). Body weight
food intake
water intake
urine
stool
blood glucose
oral glucose tolerance test (OGTT)
hemoglobin A1c (HbA1c)
glycosylated serum protein (GSP)
and insulin of type 2 diabetes rats were studied; Western blot was used to detect protein tyrosine phosphatase 1B (PTP1B)
Akt
p-Akt
glycogen synthase kinase-3β (GSK-3β)
p-GSK-3β expressions in liver tissues; Western blot to detect insulin receptor substrate-1 (IRS-1)
p-IRS-1
glucose transporter 4 (Glut4) expressions in skeletal muscle tissues. Result: SYP can reduce fasting blood glucose (FBG)
HbA1c level and OGTT of type 2 diabetes rats
reduce insulin resistance index. Compared with the model group
SYP can alleviate polydipsia
polyphagia
polyuria
and weight loss conditions in type 2 diabetic rats in each dose group (P<0.05
P<0.01)
SY can reduce insulin
glycated serum protein and random blood glucose (P<0.05
P<0.01)
the effect of SYP was better in the high-dose group; SYP can significantly increase p-IRS-1 and GLUT4 expressions (P<0.01
P<0.05)
reduce the expression of PTP1B (P<0.01
P<0.05) in skeletal muscles of type 2 diabetic model rats; SY can significantly increase p-Akt expression
and significantly reduce PTP1B
p-GSK-3β expressions (P<0.01
P<0.05) in liver of type 2 diabetic model rats. Conclusion: SYP can effectively regulate glycometabolic disorders in type 2 diabetes rats
improve insulin resistance. The regulation of skeletal muscle PI3K/Akt and liver Akt/GSK-3β signaling pathway may be the mechanism of SY in the treatment of type 2 diabetes.
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