Retinoic Acid Enhances Drug-Induced Cell Death in Anticancer Drug-Resistant Cell Lines.
- Author:
Young Mi WHANG
1
;
Yeul Hong KIM
;
Sang Won SHIN
;
Byung Soo KIM
;
Jun Suk KIM
;
Young Do YOO
;
Sun Hee PARK
Author Information
1. Department of Internal Medicine and Division of Brain Korea 21 Program for Biomedical Science, Korea. ydy@korea.ac.kr
- Publication Type:Original Article
- Keywords:
Retinoic acid;
Drug-resistant cancer cell lines;
5-fluorouracil;
Cisplatin;
Adriamycin
- MeSH:
Antibodies;
Apoptosis;
Blotting, Western;
Cell Death*;
Cell Line*;
Cell Survival;
Cisplatin;
Colonic Neoplasms;
Doxorubicin;
Fluorouracil;
Humans;
Parents;
Receptors, Cytoplasmic and Nuclear;
Receptors, Retinoic Acid;
Retinoid X Receptors;
Retinoids;
Stomach Neoplasms;
Tretinoin*;
Vitamin A
- From:Cancer Research and Treatment
2002;34(3):212-217
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: Retinoids (RA), a group of vitamin A derivatives, is known to be important for regulation of normal cellular growth and differentiation. RA treatment of various cancers resulted in cell growth inhibition and apoptosis. Therefore, the chemotherapeutic and chemopreventative activities of various types of tumor have been examined. Biological actions of RA are mediated through nuclear receptors, including the retinoic acid receptors (RARs) and retinoid X receptors (RXRs). In this study, we examined the effect of all-trans-retinoic acid (atRA) as an anticancer drug-sensitiser in cancer cell lines and in its drug- resistant cancer cell lines MATERIALS AND METGODS: Cells were maintained by RPMI 1640 medium containing 10% fetal bovine serum. Cells were treated with 1 micro M atRA for 48 h, then with the desired concentration of anticancer drug for 24 h. Cell viability was measured spectrophotometrically at 540 nm using the MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide] assay. Western blot analyses were performed with the desired antibodies. RESULTS: We investigated if pre-treatment with atRA enhanced the drug-sensitivity of various cancer cell lines to either 5-fluorouracil, adriamycin, or cisplatin. 5-FU (SNU638-F2) and CDDP-resistant cell (SNU638-Cis) lines, from a Korean gastric cancer cell line (SNU638) and the ADR-resistant cells (AD600) was established from a colon cancer cell line (SW620). Treatment of each cell line, with 1 micro M atRA, prior to drug exposure resulted in enhanced cell death in these cell lines. Furthermore, the effect of atRA on growth inhibition, in each drug-resistant cell line, was more obvious than in their parent cell lines. Increased activity of Transglutaminase II (TgaseII) and cleavage of Poly (ADP-ribose) polymerase (PARP) were also observed (western blot analysis CONCLUSION: Based on our data, we suggest that atRA enhances anticancer drug-induced cell death and reverses the drug-sensitivity of the drug-resistant cancer cell lines.
