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上海中医药大学 附属普陀医院,上海 200062
Received:14 December 2021,
Published Online:13 March 2022,
Published:05 August 2022
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陈良燕,朱月伊,王鑫鑫等.四君子汤调节NKG2A表达影响NK细胞抗结肠癌作用[J].中国实验方剂学杂志,2022,28(15):28-34.
CHEN Liangyan,ZHU Yueyi,WANG Xinxin,et al.Si Junzitang Regulates NKG2A Expression to Improve Anti-colon Cancer Function of NK Cells[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(15):28-34.
陈良燕,朱月伊,王鑫鑫等.四君子汤调节NKG2A表达影响NK细胞抗结肠癌作用[J].中国实验方剂学杂志,2022,28(15):28-34. DOI: 10.13422/j.cnki.syfjx.20220926.
CHEN Liangyan,ZHU Yueyi,WANG Xinxin,et al.Si Junzitang Regulates NKG2A Expression to Improve Anti-colon Cancer Function of NK Cells[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(15):28-34. DOI: 10.13422/j.cnki.syfjx.20220926.
目的
2
探讨中药复方四君子汤通过调节NKG2A的表达影响自然杀伤(NK)细胞抗结肠癌的作用。
方法
2
分离、纯化来自健康人外周血NK细胞进行培养,分别构建人NK细胞单培、HCT116细胞单培和NK细胞与HCT116细胞共培模型,实时荧光定量聚合酶链式反应(Real-time PCR)检测NK细胞中自然杀伤细胞2族成员A(NKG2A)、白细胞介素(IL)-15及结肠癌细胞中组织相容性白细胞抗原E(HLA-E) mRNA的表达,酶联免疫吸附测定法(ELISA)检测NK细胞中IL-15分泌;噻唑蓝(MTT)比色法筛选IL-15的浓度,检测四君子汤和IL-15对NK细胞活性和共培模型中HCT116细胞活性的影响,Real-time PCR检测四君子汤和IL-15对NK细胞中NKG2A和HCT116中HLA-E mRNA表达的影响;使用Anti-NKG2A抗体(M)阻断NKG2A/HLA-E通路,MTT比色法检测共培模型中HCT116细胞增殖情况。
结果
2
与单培组比较,NK细胞和HCT116细胞相互作用引起NK细胞的NKG2A和HCT116中的HLA-E mRNA表达均上调(
P
<
0.05);IL-15 mRNA表达和分泌也增加(
P
<
0.05);IL-15可增强NK细胞活性和抗结肠癌作用(
P
<
0.01),也可上调NKG2A表达(
P
<
0.05);与空白组比较,四君子汤组、四君子汤+IL-15组的NK细胞活性和抗结肠癌作用进一步增加(
P
<
0.01),Real-time PCR结果显示,与空白组比较,四君子汤组和四君子汤+IL-15组中NK细胞NKG2A表达下调(
P
<
0.05),共培模型中四君子汤组HCT116中HLA-E表达下调(
P
<
0.01);与相应未加M组比较,M组与IL-15+M组HCT116细胞增殖被抑制(
P
<
0.01)。
结论
2
NK细胞与结肠癌细胞相互作用可引起NKG2A-HLA-E通路活化导致NK功能受损,四君子汤可抑制该信号激活从而恢复NK细胞抗结肠癌作用。
Objective
2
To explore the mechanism of Si Junzitang in regulating the expression of NKG2A to affect the anti-colon cancer function of natural killer (NK) cells.
Method
2
NK cells isolated from healthy honors were cultured and used to construct the three incubation models of NK cells, human colon cancer HCT116 cells, and NK cells + HCT116 cells (co-incubation). real-time fluorescence quantitative polymerase chain reaction (Real-time PCR) was conducted to determine the mRNA levels of natural killer group 2 member A (NKG2A) and interleukin (IL)-15 in NK cells, as well as the mRNA level of histocompatibility leucocyte antigen E (HLA-E) in HCT116 cells. The secretion of IL-15 was detected by enzyme-linked immunosorbent assay (ELISA). Methyl thiazolyl tetrazolium (MTT) assay was employed to determine the applicable concentration of IL-15 and test the effects of Si Junzitang and IL-15 on the activities of NK cells and the HCT116 cells in the co-incubation model. The effects of Si Junzitang and IL-15 on the mRNA levels of NKG2A in NK cells and HLA-E in HCT116 cells were detected by Real-time PCR. Monalizumab (M, anti-NKG2A mab) was used to block the NKG2A-HLA-E pathway in co-incubation model, and then the proliferation of HCT116 cells was detected by MTT assay.
Result
2
The interaction of NK cells and HCT116 cells up-regulated the mRNA levels of NKG2A in NK cells and HLA-E in HCT116 cells (
P
<
0.05), as well as the expression level and secretion of IL-15 (
P
<
0.05). Compared with the blank group, Si Junzitang and Si Junzitang + IL-15 promoted the proliferation and improved the anti-colon cancer function of NK cells (
P
<
0.01). Furthermore, they down-regulated the mRNA levels of NKG2A in NK cells and HLA-E in the HCT116 cells co-incubated with NK cells (
P
<
0.01). M and IL-15 + M inhibited the proliferation of HCT116 cells compared with the groups without M (
P
<
0.01).
Conclusion
2
The interaction of NK cells and HCT116 cells can induce activation of NKG2A-HLA-E pathway to impair NK cell function. Si Junzitang can inhibit the activation of NKG2A-HLA-E pathway to restore the anti-colon cancer function of NK cells.
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