論文 - 詳細
| RRC ID | 78488 |
|---|---|
| 著者 | Miyata S, Ishii T, Kitanaka S. |
| タイトル | Reduction of HIF-1α/PD-L1 by Catalytic Topoisomerase Inhibitor Induces Cell Death Through Caspase Activation in Cancer Cells Under Hypoxia. |
| ジャーナル | Anticancer Res |
| Abstract |
BACKGROUND/AIM:Under severe hypoxia, cellular apoptosis is induced through hypoxia-inducible factor 1, alpha subunit (HIF-1α)-dependent P53 accumulation and P53 phosphorylation via ataxia telangiectasia mutated and ataxia telangiectasia and RAD3-related (ATR) activation via replication stress-induced DNA damage response (DDR) activation. We previously demonstrated that the topoisomerase I catalytic inhibitor, 3-O-(2'E,4'Z-decadienoyl)-20-O-acetylingenol (3EZ,20Ac-ingenol), induced apoptosis in Jeko-1 and Panc-1 cells, both of which show cyclin D1 overexpression. After progression to the S phase facilitated by nuclear cyclin D1, an intra S phase checkpoint was induced in the presence of 3EZ,20Ac-ingenol, by ATR activation in response to replication stress-induced DDR. MATERIALS AND METHODS:In this study, we examined whether 3-O-(2'E,4'E-decadienoyl)-20-O-acetylingenol (3EE,20Ac-ingenol) might induce a higher degree of P53 phosphorylation and additional HIF-1α and P53 accumulation in response to replication stress-induced DDR activation under hypoxic conditions than under normoxic conditions, by controlling ATR activation. RESULTS:In the Panc-1 cells, 3EE,20Ac-ingenol induced P53 activation and HIF-1α-dependent P53 accumulation through cooperative ATR activation via hypoxia-induced DDR activation. Jeko-1 cells showed slight HIF-1α accumulation under hypoxia, but HIF-1α-dependent 53 accumulation was not observed in the presence of 3EE,20Ac-ingenol, so that the cells remained resistant to hypoxia. CONCLUSION:3EE,20Ac-ingenol induces an intricate interplay between P53 and HIF-1α accumulation via ATR activation that results in a high P53 accumulation, which promoted transient expression and early disappearance of HIF-1α, accelerating cell death. Strong P53 accumulation and consequent phosphatase and tensin homolog deleted on chromosome 10 activation in Panc-1 cells also reduced HIF-1α accumulation and programmed death-ligand 1 expression, which resulted in intense apoptosis. |
| 巻・号 | 44(1) |
| ページ | 49-59 |
| 公開日 | 2024-1-1 |
| DOI | 10.21873/anticanres.16787 |
| PII | 44/1/49 |
| PMID | 38159998 |
| MeSH | Apoptosis B7-H1 Antigen / metabolism Caspases / metabolism Cell Hypoxia Cell Line, Tumor Cyclin D1 / metabolism Humans Hypoxia-Inducible Factor 1, alpha Subunit / genetics Hypoxia-Inducible Factor 1, alpha Subunit / metabolism Neoplasms* Topoisomerase I Inhibitors* / pharmacology Tumor Suppressor Protein p53 / metabolism |
| リソース情報 | |
| ヒト・動物細胞 | PANC-1(RCB2095) |