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1.江西中医药大学 药学院,实验动物科技中心,中药资源与民族药研究中心,南昌 330004
2.南昌大学 生命科学学院,南昌 330031
魏悦,在读硕士,从事中药及天然产物药理研究,E-mail:2206943189@qq.com
曹岚,副教授,硕士生导师,从事中药资源、质量标准及民族药研究,E-mail:19960248@jxutcm.edu.cn
章常华,教授,博士生导师,从事中药及天然产物药理研究,E-mail:zhangch305@126.com; *
收稿日期:2021-10-08,
网络出版日期:2022-01-28,
纸质出版日期:2022-10-20
移动端阅览
魏悦,盛军庆,程子文等.基于Nrf2/TXNIP信号通路探讨葛根芩连汤含药血清对非酒精性脂肪性肝炎的影响[J].中国实验方剂学杂志,2022,28(20):8-16.
WEI Yue,SHENG Junqing,CHENG Ziwen,et al.Effect of Gegen Qinliantang-medicated Serum on Nonalcoholic Steatohepatitis Based on Nrf2/TXNIP Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(20):8-16.
魏悦,盛军庆,程子文等.基于Nrf2/TXNIP信号通路探讨葛根芩连汤含药血清对非酒精性脂肪性肝炎的影响[J].中国实验方剂学杂志,2022,28(20):8-16. DOI: 10.13422/j.cnki.syfjx.20220254.
WEI Yue,SHENG Junqing,CHENG Ziwen,et al.Effect of Gegen Qinliantang-medicated Serum on Nonalcoholic Steatohepatitis Based on Nrf2/TXNIP Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(20):8-16. DOI: 10.13422/j.cnki.syfjx.20220254.
目的
2
探讨葛根芩连汤(GGQLT)含药血清对游离脂肪酸(FFA)诱导人肝癌细胞HepG2非酒精性脂肪性肝炎(NASH)体外模型的影响。
方法
2
建立HepG2细胞NASH体外模型,使用不同体积分数的GGQLT含药血清及白藜芦醇干预细胞。利用油红O染色检测各组细胞内脂质沉积;采用流式细胞术检测各组细胞内活性氧(ROS)水平;通过试剂盒检测各组细胞内谷胱甘肽过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)活性和甘油三酯(TG)、丙二醛(MDA)含量。采用实时荧光定量聚合酶链式反应(Real-time PCR)检测各组HepG2细胞内核转录因子(NF)E
2
相关因子2(Nrf2)、血红素加氧酶-1(HO-1)、醌氧化还原酶1(NQO1)、Kelch样环氧氯丙烷相关蛋白1(Keap1)、NF-
κ
B、白细胞介素-1
β
(IL-1
β
)、硫氧还蛋白相互作用蛋白(TXNIP)的mRNA表达情况。运用蛋白免疫印迹法(Western blot)检测各组细胞Nrf2、TXNIP的蛋白表达情况。
结果
2
FFA诱导引起细胞内脂质大量堆积。与正常组比较,模型组抗氧化酶GSH-Px和SOD的活性显著降低(
P
<
0.01),TG、ROS和MDA含量明显升高(
P
<
0.05,
P
<
0.01)。与模型组比较,GGQLT各剂量组和白藜芦醇组均可不同程度地升高细胞内SOD的活性(
P
<
0.05,
P
<
0.01),明显降低细胞内ROS、MDA水平(
P
<
0.05,
P
<
0.01);GGQLD高、中剂量组和白藜芦醇组可显著升高GSH-Px的活性(
P
<
0.01),GGQLD中、低剂量组和白藜芦醇组明显降低TG的含量(
P
<
0.05,
P
<
0.01)。与模型组比较,GGQLT高、中剂量组和白藜芦醇组可显著上调Nrf2、HO-1、NQO1的mRNA表达水平(
P
<
0.01),GGQLT各剂量组、白藜芦醇组可明显下调TXNIP蛋白表达水平和Keap1、NF-
κ
B的mRNA表达水平(
P
<
0.05,
P
<
0.01)。Nrf2-小分子干扰核糖核酸(siRNA)转染细胞后发现,与相应剂量药物的阴性对照(NC)-siRNA组比较,其Nrf2-siRNA组细胞内Nrf2表达显著下调(
P
<
0.01);GGQLT和白藜芦醇对TXNIP、IL-1
β
的抑制作用被减弱。
结论
2
FFA诱导HepG2细胞内产生ROS和炎症因子,GGQLT可提高细胞的抗炎、抗氧化能力,其作用机制可能与调节Nrf2/TXNIP信号通路相关,进而达到改善NASH的目的。
Objective
2
To investigate the effect of Gegen Qinliantang (GGQLT)-medicated serum on free fatty acid (FFA)-induced nonalcoholic steatohepatitis (NASH)
in vitro
model of human hepatoma cells HepG2.
Method
2
NASH model of HepG2 cells was established
in vitro
, and the cells were intervened with different volume fractions of GGQLT-medicated serum and resveratrol. Intracellular lipid deposition in each group was detected by oil red O staining, the level of reactive oxygen species (ROS) in each group were detected by flow cytometry, the levels of glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), triglyceride (TG) and malondialdehyde (MDA) in each group were detected by kits. Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR) was used to measure the mRNA expression levels of nuclear transcription factor (NF)E
2
-related factor 2 (Nrf2), heme oxygenase-1 (HO-1), quinone oxidoreductase 1 (NQO1), Kelch-like epichlorohydrin-associated protein-1 (Keap1), NF-
κ
B, thioredoxin interacting protein (TXNIP), interleukin-1
β
(IL-1
β
) in HepG2 cells of each group. The protein expression of Nrf2, TXNIP in cells of each group was detected by Western blot.
Result
2
FFA induced large accumulation of intracellular lipids. Compared with the normal group, the activities of GSH-Px and SOD were significantly decreased (
P
<
0.01) and the contents of TG, ROS and MDA were significantly increased (
P
<
0.05,
P
<
0.01) in the model group. Compared with the model group, all GGQLT groups and resveratrol group could elevate intracellular SOD activity to different degrees (
P
<
0.05,
P
<
0.01) and significantly reduce the levels of intracellular ROS and MDA (
P
<
0.05,
P
<
0.01), GGQLD high- and medium-dose groups and resveratrol group significantly elevated GSH-Px activity (
P
<
0.01), GGQLD medium- and low-dose groups and resveratrol group significantly decreased TG content (
P
<
0.05,
P
<
0.01). Compared with the model group, GGQLT high- and medium-dose groups and resveratrol group could significantly upregulate the mRNA expression levels of Nrf2, HO-1 and NQO1 (
P
<
0.01), all GGQLT groups and resveratrol group could significantly downregulate the TXNIP protein expression level, as well as significantly downregulate the mRNA expression levels of Keap1, NF-
κ
B (
P
<
0.05,
P
<
0.01). Nrf2-siRNA transfection of cells revealed that Nrf2 expression was significantly downregulated (
P
<
0.01) in the Nrf2-siRNA group of cells by comparing with NC-siRNA group at the corresponding dose of drugs, and the inhibitory effects of GGQLT and resveratrol on TXNIP, IL-1
β
were attenuated.
Conclusion
2
FFA induces the production of ROS and inflammatory factors in HepG2 cells, and GGQLT can improve the anti-inflammatory and antioxidant capacities of cells, and its mechanism may be related to the regulation of Nrf2/TXNIP signaling pathway, so as to improve NASH.
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