Proteomic Analysis of Chronic Restraint Stress-Induced Gan (肝)-Stagnancy Syndrome in Rats

Objective: To analyze the proteomic characteristics of Gan (肝))--ssttaaggnnaannccyy syndrome ((GGSSSS)) by seeking the differential protein in blood and tissues of GSS model rats.Methods: GSS model rats were established by chronic restraint stress,keeping rats in restrain chamber for 6 h every day for 21 successive days.Their blood and liver samples were collected at the end of experiment for differential protein detection with methods of isoelectrofocusing and polyacrylamide SDS-PAGE,silver staining,and scanning.The gel images were analyzed with Imagemaster 2D Elite software,and the excavated differential protein spots were identified with matrix assistant laser resolving TOF mass spectrometry,Western blot,ELISA,and RT-PCR,respectively.Results: A method for isolating the protein in blood serum and tissues by two-dimensional gel electrophoresis was established and optimized.Six serum proteins and three liver proteins that differentially expressed were identified.The down-regulated differential proteins in serum of GSS model rats were serum albumin precursor,beta 1 globin,antibody against muscle acetylcholine receptor,Ig lambda-2 C region,and transthyretin (TTR),and those in liver tissue were aryl sulfotransferase,enoyl-CoA hydratase,and TTR.TTR down-regulation was found in both serum and liver.Preliminary biological information analysis showed that these differential proteins involved in immune,neuroendocrine,nutrition,and substance metabolism.Conclusion: Proteomic analysis of differential proteins showed that TTR,aryl sulfotransferase,and enoyl-CoA hydratase expressions are downregulated in the GSS model rats,suggesting that the susceptibility of cancer could be enhanced by chronic stress.