Study of the mechanism of combretastatin a-4 derivative LGD5 in-duced G2/M cycle arrest and apoptosis in human cervical cancer HeLa cells
10.12092/j.issn.1009-2501.2024.10.003
- VernacularTitle:CA-4类衍生物LGD5诱导人宫颈癌HeLa细胞发生G2/M周期阻滞和凋亡的机制研究
- Author:
Lili PANG
1
;
Ying HU
;
Jie LUO
;
Qin TU
;
Min CHEN
Author Information
1. 成都市第六人民医院药剂科,成都 610051,四川
- Keywords:
combretastatin a-4;
microtubule;
tu-mour;
G2/M cycle arrest;
apoptosis;
mechanism of action
- From:
Chinese Journal of Clinical Pharmacology and Therapeutics
2024;29(10):1100-1109
- CountryChina
- Language:Chinese
-
Abstract:
AIM:To explore the mechanism of ac-tion of the microtubular inhibitor of CA-4 deriva-tive LGD5 on human cervical cancer HeLa cells.METHODS:HeLa cells were selected and divided in-to blank group,CA-4 positive control group,and dif-ferent concentrations of LGD5 were formed into the experimental group.MTT was used to investi-gate the growth inhibition of LGD5 on HeLa cells and to determine the assay concentration.Cell morphology and apoptosis were observed before and after drug administration by inverted micro-scope and acridine orange staining.Immunofluo-rescence staining was used to examine the effect of LGD5 on microtubules using DAPI.The effect of LGD5 on cell cycle by PI flow cytometry.Protein im-munoblotting was used to examine the effect of LGD5 on cyclins and apoptosis-related proteins.RE-SULTS:MTT experiments showed that LGD5 inhibit-ed HeLa cells in a time-and dose-dependent man-ner.Timed photography and acridine orange stain-ing observed that LGD5 induced apoptosis in HeLa cells and produced significant chromatin agglutina-tion and apoptotic bodies.Inhibition of microtu-bule polymerization in HeLa cells by LGD5 was ob-served by DAPI staining.The PI flow cytometry re-sults showed that LGD5 induced G2/M cycle arrest in HeLa cells,was time-dependent and dose-depen-dent within 12 h,and had a significant difference(P＜0.01),apoptosis was induced after 24 h and it was time-dependent.The results of Western blot show that,LGD5 downregulates Cdc 2 and Cdc25C,up-regulation of p-Cdc 2,and Cyclin B1 and p-histone H3,further verified that LGD5 induced G2/M cycle arrest in HeLa cells,besides,LGD5 caused in-creased Caspase 3 expression in HeLa cells,upregu-lated Caspase 9 and Bax,down-regulation of Pro-caspase 9 and Bcl-2,this result indicates that HeLa cell apoptosis induced by LGD5 is related to the mi-tochondrial pathway.CONCLUSION:The CA-4 deriv-ative LGD5 inhibited microtubule polymerization in HeLa cells,induced their G2/M cycle arrest,and subsequently induced cell apoptosis through the mitochondrial pathway.
