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Oncogene. 2002 Mar 28;21(14):2171-80.

Activation of peroxisome proliferator-activated receptor-gamma stimulates the growth arrest and DNA-damage inducible 153 gene in non-small cell lung carcinoma cells.

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  • 1First Department of Internal Medicine, Gunma University School of Medicine, Maebashi 371-8511, Japan.

Erratum in

  • Oncogene 2002 Nov 21;21(53):8220. Yamada, Masanabu [corrected to Yamada, Masanobu]; Mori, Matsumoto [corrected to Mori, Masatomo].

Abstract

Activation of peroxisome proliferator-activated receptor (PPAR)-gamma by the thiazolidinedione (TZD) class of antidiabetic drugs elicits growth inhibition in a variety of malignant tumors. We clarified the effects of TZDs on growth of human non-small cell lung carcinoma (NSCLC) cells that express endogenous PPAR-gamma. Troglitazone and pioglitazone caused inhibition of cellular growth and induced apoptosis of NSCLC cells in a time- and dose-dependent manner. Subtraction cloning analysis identified that troglitazone stimulated expression of the growth arrest and DNA-damage inducible (GADD)153 gene, and the increased expression of GADD153 mRNA was also confirmed by an array analysis of the 160 apoptosis-related genes. Western blot analysis revealed that troglitazone also increased GADD153 protein levels in a time-dependent manner. Troglitazone did not stimulate GADD153 mRNA levels in undifferentiated 3T3-L1 cells lacking PPAR-gamma expression, whereas its induction was clearly observed in differentiated adipocytes expressing PPAR-gamma. Activity of the GADD153 promoter occurred in a NSCLC cell line in transient transcription assays and was significantly stimulated by troglitazone, although binding of PPAR/retinoid X receptor heterodimer was not detected in the promoter region in gel retardation assays. Inhibition of GADD153 gene expression by an antisense phosphorothionate oligonucleotide attenuated the troglitazone-induced growth inhibition. These findings collectively indicated that activation of PPAR-gamma by TZDs could cause growth inhibition and apoptosis of NSCLC cells and that GADD153 might be a candidate factor implicated in these processes.

PMID:
11948400
[PubMed - indexed for MEDLINE]
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