CHENG Ting-ting,LI Yan,CHEN Gui-yuan.Anti-tumor Effect and Mechanism of Lycopus lucidus Polysaccharide on Non-small Cell Lung Cancer A549 Cells[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(03):83-90.
CHENG Ting-ting,LI Yan,CHEN Gui-yuan.Anti-tumor Effect and Mechanism of Lycopus lucidus Polysaccharide on Non-small Cell Lung Cancer A549 Cells[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(03):83-90. DOI: 10.13422/j.cnki.syfjx.20220221.
Anti-tumor Effect and Mechanism of Lycopus lucidus Polysaccharide on Non-small Cell Lung Cancer A549 Cells
) mRNA表达的影响;蛋白免疫印迹法(Western blot)检测LLP对A549细胞中Caspase-3,Caspase-8,Caspase-9,B淋巴细胞瘤-2(Bcl-2)相关X蛋白(Bax),CDK-1,细胞周期依赖性激酶4(CDK-4),细胞周期依赖性激酶-6(CDK-6),Cyclin B
1
,细胞周期蛋白D
1
(Cyclin D
1
)蛋白表达的影响。
结果
2
与空白组比较,LLP组A549细胞的增殖、迁移和侵袭能力均降低(
P
<
0.05,
P
<
0.01);DNA合成准备期/DNA合成前期(G
0
/G
1
期)比例升高(
P
<
0.05);凋亡率升高(
P
<
0.05,
P
<
0.01);Caspase-3,Caspase-8,Caspase-9 mRNA表达水平升高(
P
<
0.05,
P
<
0.01),CDK-1,Cyclin B
1
mRNA表达水平降低(
P
<
0.05,
P
<
0.01);Caspase-3,Caspase-8,Caspase-9,Bax蛋白表达水平升高(
P
<
0.05,
P
<
0.01),Bcl-2,CDK-1,CDK-4,CDK-6,Cyclin B
1
,Cyclin D
1
蛋白表达水平降低(
P
<
0.05,
P
<
0.01)。
结论
2
LLP可抑制A549细胞的增殖,使其周期阻滞在G
0
/G
1
期,同时可能包含DNA合成后期/DNA分裂期(G
2
/M期),并通过线粒体凋亡途径和死亡受体途径诱导细胞凋亡。
Abstract
Objective
2
To study the anti-tumor activity and mechanism of
Lycopus lucidus
polysaccharide (LLP)
in vitro
.
Method
2
Cell counting kit-8 (CCK-8) assay was used to detect the inhibitory effect of LLP (0, 5, 10, 15, 20 g·L
-1
) on the proliferation of A549 cells at different time points (24,48,72 h). The migration and invasion abilities of A549 cells were detected by wound healing assay and transwell assay after LLP (10, 20 g·L
-1
) treatment for 24,48 h. Propidium iodide (PI) single staining was applied to determine the effect of LLP of different concentrations (10,20 g·L
-1
) on the cell cycle of A549. The apoptosis of A549 cells induced by LLP (10, 20 g·L
-1
) was detected by Annexin V-FITC/PI kit. Real-time fluorescence-based quantitative polymerase chain reaction (Real-time PCR) was adopted to measure effect of LLP (10, 20 g·L
-1
) on gene expression of cysteine aspartate protease-3 (Caspase-3),cysteine aspartate protease-8 (Caspase-8),cysteine aspartate protease-9 (Caspase-9),cyclin-dependent kinase-1 (CDK-1), and Cyclin B
1
in A549 cells. Western blot was used to detect the effect of LLP on protein expression of Caspase-3,Caspase-8,Caspase-9,B-cell lymphoma 2 (Bcl-2)-associated X protein (Bax),CDK-1,cyclin-dependent kinase-4 (CDK-4),cyclin-dependent kinase-6 (CDK-6),Cyclin B
1
,and Cyclin D
1
in A549 cells.
Result
2
Compared with the blank group, the LLP group showed decreased proliferation, migration, and invasion of A549 cells (
P
<
0.05,
P
<
0.01), increased proportion of G
0
/G
1
phase (
P
<
0.05), enhanced apoptosis rate (
P
<
0.05,
P
<
0.01), elevated mRNA expression of Caspase-3,Caspase-8,and Caspase-9 (
P
<
0.05,
P
<
0.01), reduced mRNA expression of CDK-1 and Cyclin B
1
(
P
<
0.05,
P
<
0.01), up-regulated protein expression of Caspase-3,Caspase-8,Caspase-9, and Bax (
P
<
0.05,
P
<
0.01), and down-regulated protein expression of Bcl-2, CDK-1, CDK-4, CDK-6, Cyclin B
1
, and Cyclin D
1
(
P
<
0.05,
P
<
0.01).
Conclusion
2
LLP can inhibit the proliferation of A549 cells, block the cell cycle in the G
0
/G
1
phase (also G
2
/M phase), and induce cell apoptosis via the mitochondrial apoptosis pathway and death receptor pathway.
关键词
Keywords
references
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