Peroxisome proliferator-activated receptor γ reduces the growth rate of pancreatic cancer cells through the reduction of cyclin D1

被引:58
作者
Toyota, M [1 ]
Miyazaki, Y [1 ]
Kitamura, S [1 ]
Nagasawa, Y [1 ]
Kiyohara, T [1 ]
Shinomura, Y [1 ]
Matsuzawa, Y [1 ]
机构
[1] Osaka Univ, Grad Sch Med, Dept Internal Med & Mol Sci, Suita, Osaka 5650871, Japan
关键词
troglitazone; pancreatic cancer; cyclin D1;
D O I
10.1016/S0024-3205(01)01524-7
中图分类号
R-3 [医学研究方法]; R3 [基础医学];
学科分类号
1001 ;
摘要
Peroxisome proliferator-activated receptor gamma (PPARgamma) forms a heterodimeric DNA-binding complex with the retinoid X receptor (RXR) and regulates the transcription of its target genes. Activation of PPARgamma has been shown to induce G1 arrest and to inhibit cell growth of human pancreatic carcinoma cell lines. The purpose of the present study was to examine the effect of ligand activation of PPARgamma and RXR on cell growth and on the expression of G1 cyclins in a pancreatic cancer cell Line PANC-1, which expresses PPARgamma at high levels. Troglitazone, a specific ligand for PPARgamma, was found to cause a reduction in the growth rate and induced G1 cell cycle arrest and this effect was additive with that of 9-cis retinoic acid (9-cis RA), a ligand for RXR. Of the G1 cyclins tested, troglitazone specifically reduced the expression of cyclin D1 mRNA and the corresponding protein and this effect was also additive with 9-cis RA. These results suggest that the activation of PPARgamma together with RXR may be useful for the suppression of pancreatic cancer cell growth through the reduction in cyclin D1 levels. (C) 2002 Elsevier Science Inc. All rights reserved.
引用
收藏
页码:1565 / 1575
页数:11
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