Abstract |
The purpose of the present study was to investigate the mechanisms involved in the antiproliferative and apoptotic effects of MCS-C2, a novel analog of the pyrrolo[2,3-d] pyrimidine nucleoside toyocamycin and sangivamycin, in human prostate cancer LNCaP cells. MCS-C2, a selective inhibitor of cyclin-dependent kinase, was found to inhibit cell growth in a time- and dose-dependent manner, and inhibit cell cycle progression by inducing the arrest of the G1 phase and apoptosis in LNCaP cells. When treated with 3 microM MCS-C2, inhibited proliferation associated with apoptotic induction was found in the LNCaP cells in a concentration and time-dependent manner, and nuclear DAPI staining revealed the typical nuclear features of apoptosis. Furthermore, MCS-C2 induced cell cycle arrest in the G1 phase through the upregulated phosphorylation of the p53 protein at Ser-15 and activation of its downstream target gene p21WAF1/CIP1. Accordingly, these results suggest that MCS-C2 inhibits the proliferation of LNCaP cells by way of G1-phase arrest and apoptosis in association with the regulation of multiple molecules in the cell cycle progression.
|
Authors | Hae Young Park, Min Kyoung Kim, Sang-Ik Moon, Youl-Hee Cho, Chul-Hoon Lee |
Journal | Cancer science
(Cancer Sci)
Vol. 97
Issue 5
Pg. 430-6
(May 2006)
ISSN: 1347-9032 [Print] England |
PMID | 16630142
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
|
Chemical References |
- Antineoplastic Agents
- CDKN1A protein, human
- Cyclin-Dependent Kinase Inhibitor p21
- MCS-C2
- Tumor Suppressor Protein p53
- Serine
- Cyclin-Dependent Kinases
- Toyocamycin
|
Topics |
- Antineoplastic Agents
(metabolism, pharmacology, therapeutic use)
- Apoptosis
(drug effects)
- Cell Cycle
(drug effects)
- Cyclin-Dependent Kinase Inhibitor p21
(metabolism)
- Cyclin-Dependent Kinases
(antagonists & inhibitors, metabolism)
- Dose-Response Relationship, Drug
- Humans
- Male
- Phosphorylation
- Prostatic Neoplasms
(drug therapy, metabolism, pathology)
- Serine
(metabolism)
- Signal Transduction
(drug effects)
- Toyocamycin
(analogs & derivatives, metabolism, pharmacology, therapeutic use)
- Tumor Cells, Cultured
- Tumor Suppressor Protein p53
(metabolism)
- Up-Regulation
|