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1.山东中医药大学 第一临床医学院,济南 250014
2.山东中医药大学 附属医院,济南 250014
Received:27 July 2021,
Published Online:02 September 2021,
Published:20 November 2021
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吴俏兰,宋婷,陈泽涛等.基于p53/AMPK信号通路观察益气扶正解毒汤对A549细胞自噬水平和生长的影响[J].中国实验方剂学杂志,2021,27(22):65-75.
WU Qiao-lan,SONG Ting,CHEN Ze-tao,et al.Effect of Yiqi Fuzheng Jiedu Decoction on Autophagy and Growth of A549 Cells: An Exploration Based on p53/AMPK Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(22):65-75.
吴俏兰,宋婷,陈泽涛等.基于p53/AMPK信号通路观察益气扶正解毒汤对A549细胞自噬水平和生长的影响[J].中国实验方剂学杂志,2021,27(22):65-75. DOI: 10.13422/j.cnki.syfjx.20212121.
WU Qiao-lan,SONG Ting,CHEN Ze-tao,et al.Effect of Yiqi Fuzheng Jiedu Decoction on Autophagy and Growth of A549 Cells: An Exploration Based on p53/AMPK Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(22):65-75. DOI: 10.13422/j.cnki.syfjx.20212121.
目的
2
探讨益气扶正解毒汤对A549细胞自噬水平和生长的作用及机制。
方法
2
制备益气扶正解毒汤含药血清干预A549肺癌细胞。蛋白免疫印迹法(Western blot)检测A549细胞中自噬蛋白微管相关蛋白1轻链3(LC3),自噬关键分子酵母Atg6同系物1(Beclin1),p62,p53蛋白和腺苷酸活化蛋白激酶(AMPK),磷酸化AMPK(p-AMPK),哺乳动物雷帕霉素靶蛋白(mTOR)和磷酸化mTOR(p-mTOR)蛋白的水平,免疫荧光(IF)检测微管相关蛋白1A/1B轻链3B(MAP1LC3B)蛋白水平,5-乙炔基-2′脱氧尿嘧啶核苷(EDU)染色、侵袭实验(Transwell)和
β
-半乳糖苷酶染色分别检测含药血清对细胞增殖、侵袭、衰老情况的影响;设置自噬抑制剂甲基腺嘌呤(3-MA,5 mmol·L
-1
)干预组,即分为10%胎牛血清组(空白组),10%正常血清组(正常组),10%含药血清低、中、高剂量组,10%高剂量含药血清加3-MA(高剂量+3-MA)组,检测各组细胞增殖、侵袭、衰老水平;并设置p53抑制剂(PFT-
α
, 10 μmol·L
-1
)组,即分为正常组,PFT-
α
组,高剂量组,高剂量+PFT-
α
组,检测自噬相关蛋白LC3-Ⅱ,Beclin1表达水平和MAP1LC3B免疫荧光强度及各组细胞增殖、侵袭、衰老的情况。
结果
2
与空白组、正常组比较,干预A549细胞48 h,益气扶正解毒汤中、高剂量组LC3-Ⅱ和Beclin1蛋白水平呈剂量依赖性升高(
P
<
0.01);益气扶正解毒汤低、中、高剂量组p62,p-mTOR/mTOR蛋白下降(
P
<
0.05,
P
<
0.01),p53,p-AMPK/AMPK蛋白表达升高(
P
<
0.01);益气扶正解毒汤低、中、高剂量组A549细胞增殖、侵袭数量明显降低,细胞衰老数量显著增多(
P
<
0.01),同时MAP1LC3B免疫荧光强度增强,且益气扶正解毒汤高剂量组效果最佳;与益气扶正解毒汤高剂量组比较,益气扶正解毒汤高剂量+3-MA组、益气扶正解毒汤高剂量+PFT-
α
组发生增殖、侵袭的细胞数量均增加,而发生衰老的细胞数量明显减少(
P
<
0.05,
P
<
0.01),同时,高剂量+PFT-
α
组的MAP1LC3B免疫荧光强度减弱及自噬相关蛋白LC3-Ⅱ,Beclin1蛋白表达水平降低(
P
<
0.05,
P
<
0.01)。
结论
2
益气扶正解毒汤可经p53/AMPK信号通路上调A549细胞自噬水平,进而抑制A549细胞增殖、侵袭迁移,促进细胞衰老,在抑制肺癌进展中具有重要作用。
Objective
2
To investigate the effect and mechanism of Yiqi Fuzheng Jiedu decoction (YQFZJDD) on autophagy and growth of A549 cells.
Method
2
A549 cells were intervened with YQFZJDD-containing serum prepared in advance. The levels of microtubule-associated protein 1 light chain 3 (LC3), homologue of yeast autophagy-related gene 6 (Beclin1), p62, p53, adenosine 5'-monophosphate-activated protein kinase (AMPK), phosphorylated AMPK (p-AMPK), mammalian target of rapamycin (mTOR), and phosphorylated mTOR (p-mTOR) were detected by Western blot assay, and microtubule-associated protein 1A/1B light chain 3B (MAP1LC3B) by immunofluorescence (IF) assay. The proliferation, invasion, and senescence of A549 cells were separately measured by 5-ethynyl-2'-deoxyuridine (EDU) staining, Transwell assay, and
β
-galactosidase staining. In the presence of autophagy inhibitor 3-methyladenine (3-MA, 5 mmol·L
-1
), the cells were divided into the 10% fetal bovine serum (blank) group, 10% control serum (control) group, low-, medium-, and high-dose 10% YQFZJDD-containing serum groups, and high-dose 10% YQFZJDD-containing serum + 3-MA group, followed by the measurement of A549 cell proliferation, invasion, and senescence. In the adoption of p53 inhibitor Pifithrin-
α
(PFT-
α
, 10 μmol·L
-1
), the cells were divided into the control group, PFT-
α
group, high-dose YQFZJDD-containing serum group, and high-dose YQFZJDD-containing serum + PFT-
α
group. Then the LC3-Ⅱ and Beclin1 expression, MAP1LC3B fluorescence intensity, as well as A549 cell proliferation, invasion and senescence were determined.
Result
2
Compared with the blank group and control group, YQFZJDD-containing serum at the medium and high doses up-regulated the protein expression levels of LC3-Ⅱ and Beclin1 in A549 cells after 48-h intervention in a dose-dependent manner (
P
<
0.01). Besides, YQFZJDD-containing serum at the low-, medium-, and high-doses down-regulated p62 and p-mTOR/mTOR expression (
P
<
0.05,
P
<
0.01), elevated p53 and p-AMPK/AMPK (
P
<
0.01), decreased the number of proliferative and invasive cells, increased the number of senescent cells (
P
<
0.01), and enhanced the IF intensity of MAP1LC3B, with the optimal effect observed in the high-dose YQFZJDD-containing serum group (
P
<
0.01). Compared with the high-dose YQFZJDD-containing serum group, the high-dose YQFZJDD-containing serum + 3-MA group and high-dose YQFZJDD-containing serum + PFT-
α
group exhibited significantly increased proliferative and invasive cells but decreased senescent cells (
P
<
0.05,
P<
0.01). Meanwhile, the IF intensity of MAP1LC3B in the high-dose YQFZJDD-containing serum + PFT-
α
group was weakened and the LC3-Ⅱ and Beclin1 protein expression levels declined (
P
<
0.05,
P<
0.01).
Conclusion
2
YQFZJDD promotes the autophagy of A549 cells through the p53/AMPK signaling pathway to inhibit their proliferation, invasion and migration but accelerate senescence, thus playing a crucial role in inhibiting the progression of lung cancer.
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