Proteomics technique in screening of differential proteins for liver regeneration after partial hepatectomy in rats / 第二军医大学学报

ABSTRACT

Objective: To screen for the differentially expressed proteins during rat liver regeneration after partial hepatectomy (PH) by proteomics technique. Methods: Healthy male SD rats were randomly divided into 2 groups hepatectomy group and sham operated group. The hepatectomy model was produced by 70% PH (n=35) and the sham operated rats (n=5) underwent the same surgical protocol without hepatectomy. Rats were executed at 2, 12, 24, 36, 48, 72 and 168 h after partial hepatectomy (each time 5 rats) and the right lobes were harvested. The total protein was extracted and analyzed by two-dimensional gel electrophoresis and mass spectrometric analysis. The differential proteins were then analyzed by Western blotting. Results: The spots of differential protein began to rise at 2 h after PH and peaked at 36 h after PH. A total of 78 protein spots were identified and 35 significant protein spots were found by mass spectrometric analysis. The 35 protein sports fell into 5 types according to their dynamic changes 3 up-regulated and 2 down-regulated (with different regulation time periods and amplitudes); and their functions involved oxidative stress response, acute reaction, lipid and energy metabolism, intracellular signaling transduction, cell proliferation, etc., with some having unknown functions. Western blotting analysis showed that the prohibitin protein began to increase 2 h after PH and decreased to the normal levei after 48 h. Conclusion: It is indicated that many proteins and signal transduction pathways participate in the liver regeneration after partial hepatectomy.