Identification of differentially expressed proteins in tumour necrosis factor-alpha-resistant and -sensitive rat hepatoma cells.

Yasuhiro Kuramitsu, Xiulian Zhang, Yufeng Wang, Kazuyuki Nakamura

Department of Biochemistry and Functional Proteomics, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan. climates@yamaguchi-u.ac.jp

Anticancer research 2011 Jun

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Our earlier studies reported that ONO-4007, a synthetic lipid A analogue with low endotoxic activity, had shown much effect on tumour necrosis factor (TNF)-alpha-sensitive rat hepatoma cells, even though it had no effect on TNF-alpha-resistant cells. To find biomarkers which relate to the sensitivity of cancer cells to TNF-alpha, proteomic differential display analysis for TNF-alpha-resistant cKDH-8/11 and -sensitive KDH-8/YK rat hepatoma cell lines was carried out using two-dimensional gel electrophoresis and liquid chromatography-tandem mass spectrometry. Two-DE analysis showed 32 spots, whose expression was different between cKDH-8/11 cells and KDH-8/YK cells. Of these, 12 were up-regulated and 20 were down-regulated in cKDH-8/11 cells compared to KDH-8/YK cells. The up-regulated proteins include transitional endoplasmic reticulum ATPase, 78 kDa glucose-regulated protein (GRP78), heat-shock cognate 71 kDa protein (HSC71) and protein disulfide-isomerase A6. The down-regulated proteins included alpha-enolase, aldose reductase, glutathione reductase, annexin A1, glutamate dehydrogenase 1 and dihydrolipoyl dehydrogenase. These findings suggest that these differentially regulated proteins could be factors responsible for the resistance of cKDH-8/11 cells to TNF-alpha-induced cell death.

Citation

Yasuhiro Kuramitsu, Xiulian Zhang, Yufeng Wang, Kazuyuki Nakamura. Identification of differentially expressed proteins in tumour necrosis factor-alpha-resistant and -sensitive rat hepatoma cells. Anticancer research. 2011 Jun;31(6):2059-63