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辽宁中医药大学,沈阳 110847
Received:02 November 2021,
Published Online:09 February 2022,
Published:05 June 2022
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郑一,郭鹤,罗曦等.葛根芩连汤调控巨噬细胞极化趋势干预ApoE-/-小鼠动脉粥样硬化易损斑块机制[J].中国实验方剂学杂志,2022,28(11):60-69.
ZHENG Yi,GUO He,LUO Xi,et al.Gegen Qinliantang Regulates Polarization Tendency of Macrophages to Intervene in Vulnerable Plaque in AS of ApoE-/- Mice[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(11):60-69.
郑一,郭鹤,罗曦等.葛根芩连汤调控巨噬细胞极化趋势干预ApoE-/-小鼠动脉粥样硬化易损斑块机制[J].中国实验方剂学杂志,2022,28(11):60-69. DOI: 10.13422/j.cnki.syfjx.20220418.
ZHENG Yi,GUO He,LUO Xi,et al.Gegen Qinliantang Regulates Polarization Tendency of Macrophages to Intervene in Vulnerable Plaque in AS of ApoE-/- Mice[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(11):60-69. DOI: 10.13422/j.cnki.syfjx.20220418.
目的
2
探究葛根芩连汤调控巨噬细胞极化趋势干预ApoE
-/-
小鼠动脉粥样硬化(AS)易损斑块的机制。
方法
2
12只正常C57BL/6CNC小鼠作为空白组,60只同品系的ApoE
-/-
小鼠随机分为5组,即模型组、葛根芩连汤低、中、高剂量组(GQL-D、Z、G组,剂量3.12、6.24、12.48 g·kg·d
-1
)、阿托伐他汀组(西药组),以高脂饲料喂养造模。空白组、模型组予等体积无菌蒸馏水灌胃;GQL-D、Z、G组、西药组分别予对应浓度的药物灌胃8周。生化法检测总胆固醇(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)水平,大体油红O染色、苏木素-伊红(HE)染色观测主动脉区域斑块分布情况,酶联免疫吸附测定法(ELISA)检测血清中M1型促炎性因子肿瘤坏死因子-
α
(TNF-
α
)、白细胞介素-6(IL-6)水平和M2型抗炎性因子白细胞介素-13(IL-13)、转化生长因子-
β
(TGF-
β)
水平,免疫荧光双标检测巨噬细胞甘露糖受体(MMR/CD206)/精氨酸酶-1(Arg-1)、CD206/诱导型一氧化氮合酶(iNOS)蛋白表达水平,实时荧光定量聚合酶链式反应(Real-time PCR)检测主动脉Arg-1和iNOS mRNA表达水平。
结果
2
与模型组相比,GQL-Z组、GQL-G注和西药组的TG、TC、LDL-C水平明显降低(
P
<
0.05),HDL-C水平明显升高(
P
<
0.05);随着葛根芩连汤浓度的增加,斑块富集区域逐渐缩小,颜色随之变浅,以GQL-G组和西药组染色区域分布最散;给药各组的Arg-1蛋白表达水平明显升高(
P
<
0.05),CD206蛋白表达水平明显升高(
P
<
0.05),iNOS蛋白表达水平明显降低(
P
<
0.05),Arg-1 mRNA表达水平明显升高(
P
<
0.05),iNOS mRNA表达水平明显降低(
P
<
0.05)。
结论
2
葛根芩连汤对AS易损斑块的干预作用可能与其改善脂质代谢,抑制巨噬细胞M1极化,促进巨噬细胞M2极化,进而改善巨噬细胞炎症微环境有关。
Objective
2
To explore the mechanism underlying the intervention of Gegen Qinliantang (GQL) in vulnerable plaques in atherosclerosis (AS) of ApoE
-/-
mice by regulating the polarization of macrophages.
Method
2
Twelve normal C57BL/6CNC mice were used as the control group, and 60 ApoE
-/-
mice of the same line were randomized into 5 groups: model group, low-dose, middle-dose, and high-dose GQL groups (GQL-D, GQL-Z, and GQL-G groups, respectively), and atorvastatin group (western medicine group). High-fat diet was used for modeling. The control group and the model group were given (
ig
) equal volume of sterile distilled water, and GQL-D, GQL-Z, GQL-G, and western medicine groups received (
ig
) corresponding concentration of drugs for 8 weeks. The levels of total cholesterol (TC), triglyceride (TG), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C) were detected with biochemical methods. The distribution of plaques in the aortic region was observed based on oil red O staining and hematoxylin-eosin (HE) staining. Serum levels of M1 pro-inflammatory factors tumor necrosis factor (TNF)-
α
and interleukin (IL)-6 and M2 anti-inflammatory factors IL-13 and transforming growth factor (TGF)-
β
were detected by enzyme-linked immunosorbent assay (ELISA). Protein expression of macrophage mannose receptor CD206/arginase-1 (Arg-1) and CD206/inducible nitric oxide synthase (iNOS) was determined by double-labeling immunofluorescence, and mRNA expression of aortic Arg-1 and iNOS by real-time polymerase chain reaction (PCR).
Result
2
Levels of TG, TC, and LDL-C were significantly lower and HDL-C level was significantly higher in the GQL-Z, GQL-G, and western medicine groups than in the model group. As the concentration of GQL rose, the area with plaques gradually shrunk and the color became lighter. The staining areas of the GQL-G group and the western medicine group were the most scattered. The administration groups showed significant increase in the protein levels of Arg-1 and CD206, significant decrease in the protein level of iNOS, significant rise of Arg-1 mRNA level, and significant drop of iNOS mRNA level (
P
<
0.05).
Conclusion
2
GQL intervenes in the vulnerable plaques in AS by improving lipid metabolism, inhibiting macrophage M1 polarization, promoting macrophage M2 polarization, and further improving the inflammatory microenvironment.
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