Panax japlcus var polysaccharide regulates proliferation and apoptosis of gastric cancer MKN45 cells by targeting let-7a/CDK6 molecular axis / 中国肿瘤生物治疗杂志
Chinese Journal of Cancer Biotherapy
;
(6): 135-141, 2020.
Artigo
em Chinês
| WPRIM
| ID: wpr-815604
ABSTRACT
@#Objective:
To investigate the effect of panax japlcus var polysaccharide (PJPS) on the proliferation and apoptosis of gastric cancer MKN45 cells and its regulatory mechanism.Methods:
Human gastric cancer cell lines (HGC27, MGC803, MKN45) and gastric mucosal epithelial cell line GES-1 were selected for this study. Let-7a mimics and let-7a inhibitor were transfected into MKN45 cells; Gastric cancer cell lines were treated with 100 μg/ml PJPS and MKN45 was selected as the subsequent experimental cell line. MKN45 cells were cultured with 0, 10, 50, 100 and 120 μg/ml PJPS, respectively. The proliferation and apoptosis rate of MKN45 cells were detected by CCK-8 and flow cytometry, respectively. Expressions of cell cycle dependent kinase 6 (CDK6) and apoptosis-related proteins in MKN45 cells were detected by Western blotting, and the expression level of miRNAs regulating the proliferation of gastric cancer cells was detectedbyReal-timequantitativePCR(qPCR).TheDualluciferasereportergeneassaywasusedtovalidatethetargeting relationship between let-7a and CDK6.Results:
Compared with other gastric cancer cells, 100 μg/ml PJPS significantly inhibited the proliferation of MKN45 cells (P<0.01). At the same time, 100 μg/ml PJPS significantly up-regulated the expression of let-7a in MKN45 cells (P<0.01). The Dual luciferase reporter gene assay confirmed that CDK6 was the target gene of let-7a. Furthermore, PJPS inhibited the expression of CDK6 by up-regulating let-7a, thereby inhibiting the proliferation and inducing apoptosis of MKN45 cells (all P<0.01).Conclusion:
PJPS inhibits proliferation and induces apoptosis of gastric cancer MKN45 cells by regulating the let-7a/ CDK6 axis.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Idioma:
Chinês
Revista:
Chinese Journal of Cancer Biotherapy
Ano de publicação:
2020
Tipo de documento:
Artigo
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