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1.赣南医学院第一附属医院药学部,江西 赣州 341000
2.赣南医学院第一附属医院临床医学研究中心,江西 赣州 341000
3.泰和县人民医院药剂科,江西 吉安 343700
副主任药师。研究方向:医院药学、天然药物。E-mail:liyan7112@163.com
副教授,硕士。研究方向:天然药物抗肿瘤作用。电话:0797-8283981。E-mail:yangjianqiong2010@163.com
收稿日期:2023-10-17,
修回日期:2024-03-26,
录用日期:2024-03-28,
纸质出版日期:2024-04-30
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李燕,李亚梅,雷歌燕,等.纤细薯蓣皂苷诱导肺癌A549细胞自噬的作用及机制[J].中国药房,2024,35(08):912-917.
LI Yan,LI Yamei,LEI Geyan,et al.Effect and mechanism of gracillin-induced autophagy in lung cancer A549 cells[J].ZHONGGUO YAOFANG,2024,35(08):912-917.
李燕,李亚梅,雷歌燕,等.纤细薯蓣皂苷诱导肺癌A549细胞自噬的作用及机制[J].中国药房,2024,35(08):912-917. DOI: 10.6039/j.issn.1001-0408.2024.08.03.
LI Yan,LI Yamei,LEI Geyan,et al.Effect and mechanism of gracillin-induced autophagy in lung cancer A549 cells[J].ZHONGGUO YAOFANG,2024,35(08):912-917. DOI: 10.6039/j.issn.1001-0408.2024.08.03.
目的
2
探讨吉祥草中纤细薯蓣皂苷(gracillin)诱导人非小细胞肺癌A549细胞自噬的作用及机制。
方法
2
以A549细胞为对象,采用CCK-8法检测不同浓度(0.25、0.5、1、2、4 μmol/L)gracillin作用不同时间(12、24、48 h)对细胞增殖的影响。与不加药物的对照组进行比较,采用生物透射电子显微镜观察gracillin(2 μmol/L)作用24 h对细胞自噬小体形成的影响;通过GFP-LC3质粒转染实验检测gracillin(0.25、0.5、1、2 μmol/L)作用24 h后GFP-LC3在细胞自噬小体膜上的聚集情况;采用实时定量聚合酶链式反应法和Western blot法检测gracillin(0.25、0.5、1、2 μmol/L)作用24 h后A549细胞中序列相似性家族102成员A(FAM102A) mRNA和蛋白的表达水平,以及自噬相关蛋白[p62、Beclin-1、微管相关蛋白1轻链3B(LC3B)]和磷脂酰肌醇3激酶(PI3K)/蛋白激酶B(又名Akt)信号通路相关蛋白的表达水平。
结果
2
gracillin对A549细胞具有一定的增殖抑制作用,且呈浓度和时间依赖趋势;其作用24 h的半数抑制浓度为2.55 μmol/L。gracillin作用24 h后,细胞胞浆内可见含双层膜结构的自噬小体;自噬小体膜上可见明显的GFP-LC3绿色荧光斑点,且有随药物浓度升高而增多的趋势。与对照组比较,gracillin不同浓度组细胞中FAM102A mRNA和蛋白的表达水平(0.5、1、2 μmol/L组)、Beclin-1蛋白的表达水平(1、2 μmol/L组)和LC3B-Ⅱ/LC3B-Ⅰ比值(2 μmol/L组)均显著升高,p62蛋白的表达水平(1、2 μmol/L组)和Akt蛋白(1、2 μmol/L组)、PI3K蛋白(2 μmol/L组)的磷酸化水平均显著降低(
P
<0.05或
P
<0.01)。
结论
2
gracillin可能通过上调FAM102A mRNA和蛋白的表达、抑制PI3K/Akt信号通路来促进A549细胞发生自噬,从而发挥抑制细胞增殖的作用。
OBJECTIVE
2
To investigate the effect and mechanism of gracillin from
Reineckia carnea
on autophagy in non-small cell lung cancer A549 cells.
METHODS
2
Using A549 cells as subjects, the effects of different concentrations of gracillin (0.25, 0.5, 1, 2, 4 μmol/L) on the proliferation of cells were detected by CCK-8 after being treated for different time (12, 24, 48 h). Compared with the control group without medication, the effect of gracillin (2 μmol/L) on the formation of autophagosomes in cells was observed by transmission electron microscope after 24 h of exposure. The aggregation of GFP-LC3 on autophagosome membrane was detected by GFP-LC3 plasmid transfection after being treated with gracillin (0.25, 0.5, 1, 2 μmol/L) for 24 h. Quantitative real-time PCR and Western blot assay were used to detect the mRNA and protein expressions of family with sequence similarity 102 member A(FAM102A), the expressions of autophagy-related proteins [p62, Beclin-1, microtubule-associated protein 1 light chain 3B (LC3B)], and the expressions of phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway-related proteins in A549 cells after being treated with gracillin (0.25, 0.5, 1 and 2 μmol/L) for 24 h.
RESULTS
2
Gracillin significantly inhibited the proliferation of A549 cells in a concentration- and time-dependent manner. The IC
50
was 2.55 μmol/L at 24 h. After 24 h of gracillin treatment, autophagosomes with bilayer membrane structure were found in the cell cytoplasm, and GFP-LC3 green fluorescent spots on autophagosome membrane were obvious, representing an increasing trend as drug concentration. Compared with the control group, mRNA and protein expressions of FAM102A (0.5, 1, 2 μmol/L groups), protein expression of Beclin-1 (1, 2 μmol/L groups) and LC3B-Ⅱ/LC3B-Ⅰ ratio (2 μmol/L group) were significantly increased in different concentrations of gracillin groups, while the protein expression of p62 (1, 2 μmol/L groups), and the protein phosphorylations of Akt (1, 2 μmol/L groups) and PI3K (2 μmol/L group) were all decreased significantly (
P
<0.05 or
P
<0.01).
CONCLUSIONS
2
Gracillin can promote excessive autophagy in A549 cells by up-regulating mRNA and protein expressions of FAM102A and inhibiting PI3K/Akt signaling pathway, thus inhibiting cell proliferation.
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