Differential Proteomic Analysis of Gender-dependent Hepatic Tumorigenesis in Hras12V Transgenic Mice.

Molecular & Cellular Proteomics : MCP
Zhuona RongAi-Guo Wang

Abstract

Male prevalence is an outstanding characteristic of hepatocellular carcinoma (HCC), and the underlying mechanisms for this have remained largely unknown. In the present study, Hras12V transgenic mice, in which hepatocyte-specific expression of the ras oncogene induces male-biased hepatic tumorigenesis, were studied, and altered proteins were detected by two-dimensional fluorescence difference gel electrophoresis (2D-DIGE). Protein samples from hepatic tumor tissues (T) and peritumor tissues (P) of transgenic males and females and the corresponding normal liver tissues (Wt) of nontransgenic males and females were subjected to pairwise comparisons based on proteomic analysis. Among 2381 autodetected protein spots, more than 1600 were differentially expressed based on a pairwise comparison (|ratio| > = 1.5, p < = 0.05). Of these, 180 spots were randomly selected for matrix-assisted laser desorption ionization tandem time-of-flight mass spectrometry (MALDI-TOF/TOF MS) identification; finally, 89 distinct proteins were obtained. Among these 89 proteins, 7 and 50 proteins were further validated by Western blotting and literature investigation, respectively. Intriguingly, compared with Wt, the altered proteins were relatively concentr...Continue Reading

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