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1.中国中医科学院 中药研究所,北京 100700
2.中国食品药品检定研究院,北京 100050
彭博,博士,研究员,从事中药肿瘤药理研究,E-mail:bpeng@icmm.ac.cn
李建荣,博士,研究员,从事中药药理学和毒理学研究,E-mail:jrli@icmm.ac.cn
胡晓茹,博士,副研究员,从事中药质量控制研究,E-mail:huxiaoru@nifdc.org.cn;*
收稿日期:2021-11-25,
网络出版日期:2022-01-29,
纸质出版日期:2022-05-05
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彭博,练东银,张广平等.基于PI3K/Akt信号通路探讨小金丹对巨噬细胞极化的调控作用及机制[J].中国实验方剂学杂志,2022,28(09):36-42.
PENG Bo,LIAN Dong-yin,ZHANG Guang-ping,et al.Xiaojindan Extract Modulated Macrophage Polarization by Targeting PI3K/Akt Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(09):36-42.
彭博,练东银,张广平等.基于PI3K/Akt信号通路探讨小金丹对巨噬细胞极化的调控作用及机制[J].中国实验方剂学杂志,2022,28(09):36-42. DOI: 10.13422/j.cnki.syfjx.20220724.
PENG Bo,LIAN Dong-yin,ZHANG Guang-ping,et al.Xiaojindan Extract Modulated Macrophage Polarization by Targeting PI3K/Akt Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(09):36-42. DOI: 10.13422/j.cnki.syfjx.20220724.
目的
2
探讨小金丹提取物(XJD)对巨噬细胞极化的调控作用及作用机制。
方法
2
以脂多糖(LPS)、白细胞介素-4(IL-4)刺激RAW264.7细胞诱导M1型和M2型极化。采用细胞增殖活性检测(CCK-8)法检测10~80 mg·L
-1
对RAW264.7细胞增殖活性的影响;采用Griess法检测一氧化氮(NO)的释放;采用酶联免疫吸附测定法(ELISA)检测细胞因子白细胞介素-6(IL-6)释放;采用实时荧光定量聚合酶链式反应(Real-time PCR)检测M1型和M2型巨噬细胞标志物的mRNA表达;采用流式细胞分析法检测CD206表达;蛋白免疫印迹法(Western blot)检测磷脂酰肌醇3-激酶/蛋白激酶B(PI3K/Akt)信号通路关键蛋白的活化。
结果
2
10~80 mg·L
-1
XJD对0.5 mg·L
-1
LPS和20 μg·L
-1
IL-4诱导的RAW264.7细胞增殖未见明显影响。与空白组比较,LPS诱导组M1型巨噬细胞标志物表达升高,主要包括显著增加NO、IL-6释放(
P
<
0.01),明显上调M1型基因白细胞介素-1
β
(IL-1
β
)、一氧化氮合酶(iNOS)、前列腺素氧化环化酶-2(COX-2)和肿瘤坏死因子-
α
(TNF-
α
)mRNA表达(
P
<
0.01)。同LPS诱导组比较,20~80 mg·L
-1
XJD能浓度依赖性显著抑制NO、IL-6的释放(
P
<
0.01);10~80 mg·L
-1
XJD能浓度依赖性下调M1型基因IL-1
β
、iNOS、COX-2和TNF-
α
mRNA表达(
P
<
0.01)。与空白组比较,IL-4诱导组M2型巨噬细胞标志物表达升高,主要包括CD206
+
巨噬细胞比例显著升高(
P
<
0.01),显著上调M2型基因精氨酸-1(Arg-1)、白细胞介素-10(IL-10)、白细胞介素-13(IL-13)和转化生长因子-
β
1
(TGF-
β
1
)mRNA表达(
P
<
0.01)。同IL-4诱导组比较,10~80 mg·L
-1
XJD能浓度依赖性显著降低CD206
+
M2型巨噬细胞比例(
P
<
0.01);显著下调Arg-1、IL-10、IL-13和TGF-
β
1
mRNA表达(
P
<
0.01)。Western blot结果显示,与空白组比较,LPS和IL-4诱导组磷脂酰肌醇3-激酶p110(PI3K-p110)和磷酸化蛋白激酶B(p-Akt)表达均显著上调(
P
<
0.01);同LPS或IL-4诱导组比较,XJD能明显降低PI3K p110蛋白表达和p-Akt水平(
P
<
0.05,
P
<
0.01)。
结论
2
小金丹提取物能抑制LPS和IL-4诱导RAW264.7细胞的M1型极化和M2型极化,机制与降低PI3K/Akt通路的活化水平有关。
Objective
2
To explore the effect and mechanism of Xiaojindan extract (XJD) on macrophage polarization.
Method
2
Lipopolysaccharide (LPS) and interleukin-4 (IL-4) were used to induce M1 and M2 polarization of RAW264.7 cells. The influence of 10-80 mg·L
-1
XJD on cell proliferation was detected by Cell Counting Kit-8 (CCK-8) assay. Nitric oxide (NO) and interleukin-6 (IL-6) release was explored by Griess assay and enzyme-linked immunosorbent assay (ELISA), respectively. The mRNA expression of M1 and M2 macrophage markers was measured by real-time quantitative polymerase chain reaction (Real-time PCR), and the CD206
+
expression was determined by flow cytometry. The activation of phosphatidylinositol 3-kinase/protein kinase B (PI3K/Akt) pathway was analyzed by western blot.
Result
2
10-80 mg·L
-1
XJD showed no marked cytotoxicity in LPS (0.5 mg·L
-1
)- or IL-4 (20 μg·L
-1
)-induced RAW264.7 cells. Compared with the control group, LPS significantly promoted the expression of M1 macrophage markers (
P
<
0.01), including increased NO and IL-6 release (
P
<
0.01) and upregulated mRNA expression of interleukin-1
β
(IL-1
β
), inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2) and tumor necrosis factor-
α
(TNF-
α
) (
P
<
0.01). Compared with LPS-induced group, 20-80 mg·L
-1
XJD decreased the release of NO and IL-6 in a dose-dependent manner (
P
<
0.01), and similarly 10-80 mg·L
-1
XJD suppressed the mRNA expression of IL-1
β
, iNOS, COX-2 and TNF-
α
(
P
<
0.01). Compared with the control group, IL-4 obviously increased the expression of M2 macrophage markers (
P
<
0.01), including increased CD206
+
cell population and upregulated mRNA expression of arginine-1 (Arg-1), interleukin-10 (IL-10), interleukin-13 (IL-13) and transforming growth factor-
β
1
(TGF-
β
1
). Compared with IL-4-induced group, 10-80 mg·L
-1
XJD dose-dependently decreased CD206
+
cell population (
P
<
0.01) and inhibited the mRNA expression of Arg-1, IL-10, IL-13 and TGF-
β
1
(
P
<
0.01). Western blot showed that XJD significantly downregulated the activation of PI3K/Akt pathway as compared to LPS- and IL-4-induced groups (
P
<
0.05,
P
<
0.01).
Conclusion
2
XJD significantly inhibited the macrophage polarization in the LPS- and IL-4-induced RAW264.7 cells by targeting PI3K/Akt pathway.
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