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| Content Provider | Springer Nature Link |
|---|---|
| Author | Jeon, H. K. Choi, S. u. Jung, N. P. |
| Copyright Year | 2005 |
| Abstract | To investigate the mechanism by which nitric oxide (NO) induces cell death in colon cancer cells, we compared two types of colon cancer cells with different p53 status: HCT116 (p53 wild-type) cells and SW620 (p53-deficient) cells. We found that S-nitrosoglutathione (GSNO), the NO donor, induced apoptosis in both types of colon cancer cells. However, SW620 cells were much more susceptible than HCT116 cells to apoptotic death by NO. We investigated the role of extracellular signal-regulated kinase 1/2 (ERK1/2) and p38 kinase on NO-induced apoptosis in both types of colon cancer cells. GSNO treatment effectively stimulated activation of the ERK1/2 and p38 kinase in both types of cells. In HCT116 cells, pretreatment with PD98059, an inhibitor of ERK1/2, or SB203580, an inhibitor of p38 kinase, had no marked effect on GSNO-induced apoptosis. However, in SW620 cells, SB203580 significantly reduced the NO-induced apoptosis, whereas PD098059 increases NO-induced apoptosis. Furthermore, we found evidence of cell cycle arrest of the G0/G1 phase in SW620 cells but not in HCT116 cells. Inhibition of ERK1/2 with PD098059, or of p38 kinase with SB203580, reduced the GSNO-induced cell cycle arrest of the G0/G1 phase in SW620 cells. We therefore conclude that NO-induced apoptosis in colon cancer cells is mediated by a p53-independent mechanism and that the pathways of ERK1/2 and p38 kinase are important in NO-induced apoptosis and in the cell cycle arrest of the G0/G1 phase. |
| Starting Page | 115 |
| Ending Page | 125 |
| Page Count | 11 |
| File Format | |
| ISSN | 07422091 |
| Journal | Cell Biology and Toxicology |
| Volume Number | 21 |
| Issue Number | 2 |
| e-ISSN | 15736822 |
| Language | English |
| Publisher | Kluwer Academic Publishers |
| Publisher Date | 2005-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | Subscribed |
| Subject Keyword | apoptosis cell cycle colon cancer cells ERK1/2 nitric oxide p38 kinase p53 protein Pharmacology/Toxicology Biochemistry Cell Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Health, Toxicology and Mutagenesis Toxicology |
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