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1.贵州中医药大学 第一临床医学院,贵阳 550002
2.贵州中医药大学 第一附属医院,贵阳 550001
Received:31 July 2022,
Published Online:19 October 2022,
Published:05 March 2023
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周相宇,周素芳,李玉茹等.基于Nrf2信号通路探究参苓白术散调节铁死亡对酒精性肝损伤大鼠的影响[J].中国实验方剂学杂志,2023,29(05):104-113.
ZHOU Xiangyu,ZHOU Sufang,LI Yuru,et al.Effect of Shenling Baizhusan on Alcoholic Liver Injury in Rats by Regulating Ferroptosis Based on Nrf2 Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(05):104-113.
周相宇,周素芳,李玉茹等.基于Nrf2信号通路探究参苓白术散调节铁死亡对酒精性肝损伤大鼠的影响[J].中国实验方剂学杂志,2023,29(05):104-113. DOI: 10.13422/j.cnki.syfjx.20221907.
ZHOU Xiangyu,ZHOU Sufang,LI Yuru,et al.Effect of Shenling Baizhusan on Alcoholic Liver Injury in Rats by Regulating Ferroptosis Based on Nrf2 Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(05):104-113. DOI: 10.13422/j.cnki.syfjx.20221907.
目的
2
观察参苓白术散通过调节核因子E
2
相关因子2(Nrf2)信号通路的干预调节铁死亡对酒精性肝损伤大鼠的影响。
方法
2
将40只SD大鼠随机分为模型组、多烯磷脂酰胆碱组、参苓白术散高、中、低剂量组,每组8只,另取8只SD大鼠作为正常组。模型组、多烯磷脂酰胆碱组、参苓白术散高、中、低剂量组予以10 mL·kg
-1
灌胃造模,正常组予以等体积蒸馏水灌胃;每日灌酒4 h后,予以多烯磷脂酰胆碱组143.64 mg·kg
-1
药物灌胃、参苓白术散高、中、低剂量组分别予以15、7.5、3.75 mg·kg
-1
的药物,正常组与模型组予以等体积蒸馏水灌胃,灌胃连续6周。全自动生化仪检测丙氨酸氨基转移酶(ALT)、天冬氨酸氨基转移酶(AST)、谷氨酰转肽酶(GGT)、总胆固醇(TC)、甘油三酯(TG)水平,酶联免疫吸附测定法(ELISA)检测肿瘤坏死因子-
α
(TNF-
α
)、白细胞介素-1
β
(IL-1
β
)水平,生化检测法检测脂多糖(LPS)、丙二醇(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽(GSH)、铁离子(Fe
+
)水平,苏木素-伊红(HE)和油红O染色观察肝脏病理变化,实时荧光定量聚合酶链式反应(Real-time PCR)检测Nrf2、血红素加氧酶-1(HO-1)、谷胱甘肽过氧化物酶4(GPX4)、铁蛋白重链1(FTH1)、核转录因子-
κ
B(NF-
κ
B) mRNA表达,蛋白免疫印迹法(Western blot)检测Nrf2、HO-1、GPX4、FTH1、p65、磷酸化(p)-p65蛋白表达。
结果
2
与正常组比较,模型组肝功能(ALT、AST、GGT)、血脂(TC、TG)水平明显升高(
P
<
0.05),肝脏出现明显脂肪变性,有大量脂肪沉积,氧化应激水平及炎症因子明显升高(
P
<
0.05),Fe
+
水平明显增高(
P
<
0.05),Nrf2、HO-1、GPX4、FTH1蛋白表达明显下调(
P
<
0.05),p65、p-p65蛋白表达明显上调(
P
<
0.05),Nrf2、HO-1、GPX4、FTH1 mRNA表达明显下调(
P
<
0.05),NF-
κ
B mRNA表达明显上调(
P
<
0.05);与模型组比较,参苓白术散高、中剂量组肝功能(ALT、AST、GGT)、血脂(TC、TG)水平明显下调(
P
<
0.05),肝脏脂肪变性明显改善,脂肪沉积明显减少,氧化应激水平以及炎症因子明显降低(
P
<
0.05),Fe
+
水平明显降低(
P
<
0.05),Nrf2、HO-1、GPX4、FTH1蛋白表达明显上调(
P
<
0.05),p65、p-p65蛋白表达明显下调(
P
<
0.05),Nrf2、HO-1、GPX4、FTH1 mRNA表达明显上调(
P
<
0.05)、NF-
κ
B mRNA表达明显下调(
P
<
0.05)。
结论
2
参苓白术散能够有效减少ALD大鼠肝损伤,调节脂肪变性与脂肪沉积,并在肝脏内发挥抗氧化与抗炎作用;其作用机制可能与上调Nrf2信号通路改善氧化应激的途径抑制肝细胞内铁死亡发生有关。
Objective
2
To observe the effect of Shenling Baizhusan on the intervention of the nuclear factor erythroid 2-related factor 2 (Nrf2) signaling pathway by regulating ferroptosis in rats with alcoholic liver injury.
Method
2
Forty SD rats were randomly divided into model group, polyene phosphatidylcholine group, and high, medium, and low-dose Shenling Baizhusan groups, with 8 rats in each group. Another 8 SD rats were taken as blank group. The model group, polyene phosphatidylcholine group, high, medium, and low-dose Shenling Baizhusan groups were given 10 mL·kg
-1
liquor by gavage for modeling, and the blank group was given equal volume of distilled water by gavage. After 4 h of daily alcoholic administration, 143.64 mg·kg
-1
of polyene phosphatidylcholine group was given to the polyene phosphatidylcholine group, 15, 7.5, 3.75 mg·kg
-1
of Shenling Baizhusan were given to Shenling Baizhusan high, medium, and low-dose groups, respectively, and the blank group and the model group were given equal volume of distilled water. The gavage lasted for 6 weeks. The levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), glutamyl transpeptidase (GGT), total cholesterol (TC), and triglyceride (TG) were detected by automatic biochemical analyzer. The levels of tumor necrosis factor-
α
(TNF-
α
) and interleukin-
β
(IL-
β
) were detected by the enzyme-linked immunosorbent assay (ELISA). The levels of lipopolysaccharide (LPS), malondialdehyde (MDA), superoxide dismutase (SOD), glutathione (GSH), and Fe
+
were detected by biochemical assay. The pathological changes in the liver were observed by hematoxylin-eosin (HE) staining and oil red O staining. The mRNA expression levels of Nrf2, heme oxygenase-1 (HO-1), glutathione peroxidase 4 (GPX4), ferritin heavy polypeptide 1 (FTH1), and nuclear factor-
κ
B (NF-
κ
B) were detected by Real-time polymerase chain reaction (Real-time PCR). The protein expression levels of Nrf2, HO-1, GPX4, FTH1, p65, and phosphorylation (p)-p65 were detected by Western blot.
Result
2
As compared with the blank group, the levels of liver function (ALT, AST, and GGT) and blood lipids (TC and TG) in the model group were significantly increased (
P
<
0.05). The liver showed obvious steatosis, with a large number of fat deposition, the oxidative stress and inflammatory factors were significantly increased (
P
<
0.05), and the level of Fe
+
was significantly increased in model group (
P
<
0.05). The protein expression levels of Nrf2, HO-1, GPX4, and FTH1 was significantly down-regulated (
P
<
0.05), and those of p65 and p-p65 was significantly up-regulated in the model group (
P
<
0.05). The mRNA expression levels of Nrf2, HO-1, GPX4, and FTH1 were significantly down-regulated (
P
<
0.05), and the mRNA expression level of NF-
κ
B was significantly up-regulated (
P
<
0.05). As compared with the model group, the levels of liver function (ALT, AST, and GGT) and blood lipids (TC and TG) in the high-dose and medium-dose Shenling Baizhusan groups were significantly decreased (
P
<
0.05), liver steatosis was significantly improved, fat deposition was significantly reduced, oxidative stress and inflammatory factors were significantly decreased (
P
<
0.05 ), and Fe
+
level was significantly decreased (
P
<
0.05). In the high-dose and medium-dose Shenling Baizhusan, the protein expression levels of Nrf2, HO-1, GPX4, and FTH1 were significantly up-regulated (
P
<
0.05), and those of p65, p-p65 were significantly down-regulated (
P
<
0.05). The mRNA expression levels of Nrf2, HO-1, GPX4, and FTH1 were significantly up-regulated (
P
<
0.05), and the mRNA expression level of NF-
κ
B was significantly down-regulated (
P
<
0.05).
Conclusion
2
Shenling Baizhusan can effectively reduce liver injury in rats with ALD, regulate steatosis and fat deposition, and play an antioxidant and anti-inflammatory role in the liver. Its mechanism may be related to the inhibition of ferroptosis in hepatocytes by up-regulating the Nrf2 signaling pathway to improve oxidative stress
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