Proteomic analysis of differential protein expression in human nasopharyngeal carcinoma cells induced by NAG7 transfection.
Nasopharyngeal carcinoma (NPC) is a commonly occurring tumor in southern China and south east Asia. A 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 with 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 pathways and apoptosis. NAG7 may exert its functions by mediating differential expression of these proteins.
Tan
Chen
C
Cancer Research Institute, School of Xiangya Medicine, Central South University, Changsha, Hunan, China.
Li
Jiang
J
Wang
Jieru
J
Xiang
Qiu
Q
Zhang
Xiaomei
X
Dong
Li
L
Shen
Shourong
S
Liang
Songping
S
Li
Guiyuan
G
D000818:Animals; D002277:Carcinoma / Q000235:genetics*; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007091:Image Processing, Computer-Assisted; D051379:Mice; D009303:Nasopharyngeal Neoplasms / Q000235:genetics*; D009363:Neoplasm Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D020543:Proteome / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D014407:Tumor Cells, Cultured
D009363:Neoplasm Proteins; D020543:Proteome