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1.江西中医药大学 中医学院,南昌 330004
2.甘肃中医药大学 基础医学院,兰州 730000
3.宁夏医科大学 中医学院,银川 750000
柳荣,在读博士,从事中医不同治法防治糖尿病的效应机制研究,E-mail:2240065473@qq.com
梁永林,博士,教授,主任医师,从事中医基础理论研究,E-mail:875532437@qq.com
收稿日期:2023-04-12,
网络出版日期:2023-08-14,
纸质出版日期:2023-10-20
移动端阅览
柳荣,王佳慧,杨霞等.加味葛根芩连汤对2型糖尿病db/db小鼠FXR/SHP/PPARα信号通路的影响[J].中国实验方剂学杂志,2023,29(20):1-8.
LIU Rong,WANG Jiahui,YANG Xia,et al.Effect of Modified Gegen Qinliantang on FXR/SHP/PPARα Signaling Pathway in Type 2 Diabetic db/db Mice[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(20):1-8.
柳荣,王佳慧,杨霞等.加味葛根芩连汤对2型糖尿病db/db小鼠FXR/SHP/PPARα信号通路的影响[J].中国实验方剂学杂志,2023,29(20):1-8. DOI: 10.13422/j.cnki.syfjx.20231041.
LIU Rong,WANG Jiahui,YANG Xia,et al.Effect of Modified Gegen Qinliantang on FXR/SHP/PPARα Signaling Pathway in Type 2 Diabetic db/db Mice[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(20):1-8. DOI: 10.13422/j.cnki.syfjx.20231041.
目的
2
该研究拟通过观察加味葛根芩连汤对2型糖尿病(T2DM)模型db/db小鼠肝组织核受体法尼醇X受体/小异源二聚体伴侣/过氧化物酶体增殖物激活受体
α
(FXR/SHP/PPAR
α
)信号通路相关蛋白表达水平的影响,探讨加味葛根芩连汤可能的作用机制。
方法
2
将30只db/db小鼠随机分为模型组、二甲双胍组(0.2 g·kg
-1
)、加味葛根芩连汤高、中、低剂量组(31.9、19.1、6.4 g·kg
-1
),每组6只,另取6只m/m小鼠作为空白组,分别给予相应药物灌胃12周。检测小鼠体质量、空腹血糖(FBG)、总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)含量,油红O染色观察肝脏脂质蓄积,过碘酸-雪夫(PAS)染色观察肝糖原沉积,硫酸铁铵染色观察回肠组织胆固醇沉积,蛋白免疫印迹法(Western blot)检测肝组织FXR、胆固醇7
α
-羟化酶(CYP7A1)、SHP、PPAR
α
蛋白表达,酶联免疫吸附测定法(ELISA)检测血清游离脂肪酸(FFA)水平。
结果
2
治疗结束后,与空白组比较,模型组小鼠体质量、FBG、FFA、TC、TG、LDL-C水平均显著升高(
P
<
0.01),肝组织内有大量脂滴,肝糖原显著减少,回肠组织内有明显胆固醇堆积,肝组织FXR、SHP、PPAR
α
蛋白表达显著降低,CYP7A1蛋白表达显著增高(
P
<
0.01);与模型组比较,二甲双胍组及加味葛根芩连汤高、中剂量组小鼠体质量、FBG、FFA、TC、TG、LDL-C水平明显降低(
P
<
0.05,
P
<
0.01),HDL-C水平明显增加(
P
<
0.05,
P
<
0.01),肝细胞脂质蓄积减少,肝糖原显著增加,回肠组织胆固醇减少,肝组织FXR、SHP、PPAR
α
蛋白表达显著增高,CYP7A1蛋白表达显著降低(
P
<
0.01)。
结论
2
加味葛根芩连汤可能通过调节FXR/SHP/PPAR
α
信号通路抑制FFA水平,改善T2DM小鼠脂质代谢。
Objective
2
To observe the effect of modified Gegen Qinliantang on the expression levels of proteins related to the farnesoid X receptor/small heterodimer partner/peroxisome proliferator-activated receptor
α
(FXR/SHP/PPAR
α
) signaling pathway in the liver tissue of db/db model mice with type 2 diabetes mellitus (T2DM) and explore the underlying mechanism of action of modified Gegen Qinliantang.
Method
2
Thirty db/db mice were randomly divided into model group, metformin group (0.2 g·kg
-1
), and high-, medium-, and low-dose modified Gegen Qinliantang groups (31.9, 19.1, 6.4 g·kg
-1
), with 6 mice in each group. An additional six m/m mice were assigned to the blank group. Respective drugs were administered via oral gavage for 12 weeks. Mouse body weight, fasting blood glucose (FBG), total cholesterol (TC), triglyceride (TG), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C) levels were measured. Oil red O staining was used to observe hepatic lipid accumulation and periodic acid-schiff (PAS) staining was used to assess hepatic glycogen deposition. Ammonium ferric sulfate staining was used to observe cholesterol deposition in intestinal tissues. Western blot was employed to detect the expression of FXR, cholesterol 7
α
-hydroxylase (CYP7A1), SHP, and PPAR
α
proteins in liver tissues, and enzyme-linked immunosorbent assay (ELISA) was used to measure serum free fatty acid (FFA) levels.
Result
2
At the end of the treatment, compared with the blank group, the model group exhibited significant increases in mouse body weight, FBG, FFA, TC, TG, and LDL-C levels (
P
<
0.01), along with significant hepatic lipid droplets, reduced hepatic glycogen, noticeable cholesterol accumulation in intestinal tissues, significantly decreased expression of FXR, SHP, PPAR
α
proteins, and significantly increased expression of CYP7A1 protein in liver tissues (
P
<
0.01). Compared with the model group, the metformin group and the high- and medium-dose modified Gegen Qinliantang groups demonstrated significant reductions in mouse body weight, FBG, FFA, TC, TG, LDL-C levels (
P
<
0.05,
P
<
0.01), significant increases in HDL-C levels (
P
<
0.05,
P
<
0.01), decreased hepatic lipid accumulation, increased hepatic glycogen, reduced intestinal cholesterol accumulation, significantly increased expression of FXR, SHP, PPAR
α
proteins, and significantly decreased expression of CYP7A1 protein in liver tissues (
P
<
0.01).
Conclusion
2
Modified Gegen Qinliantang may regulate the FXR/SHP/PPAR
α
signaling pathway to suppress FFA levels and improve lipid metabolism in T2DM mice.
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