HGM2002 Poster Abstracts: 4. Functional Genomics
POSTER NO: 226
Proteomic analysis of differential protein expression in human nasopharyngeal carcinoma cells induced by NAG7 transfection
1Chen Tan, 1Jiang Li, 1Jieru Wang, 1Qiu Xiang, 1Xiaomei Zhang, 1Li Dong, 1Shourong Shen, 2Songping Liang, 1Guiyuan Li
Nasopharyngeal carcinoma (NPC) is a commonly occurring tumor in southern China and Southeast Asia. Genetic factor has now been recognized to be associated with this cancer. A new gene, named NAG7, was cloned from the common minimal deletion region in 3p25.3-26.3. In order to investigate the function of NAG7 gene, proteomic methods were used to find and identify the differential proteins and expected to elucidate the mechanism of NAG7. The NAG7 eukaryotic expression vector was constructed and transfected into NPC cell line HNE1 by liposome. Twenty-two differential protein spots in transfected cells were found significant and reproducible using high-resolution two- dimensional electrophoresis. Nine proteins that were up-regulated and seven proteins that were down-regulated were identified by matrix assisted laser desorption/ionization time of flight mass spectrometry and database analysis. These proteins included growth arrest specific protein, DNA binding protein, caspase 6, pinch protein and ras- related protein rab-36, which are involved in cell cycling, transcription regulation, signaling pathway and apoptosis. NAG7 may exert its functions by mediateing differential expression of these proteins.
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