[Proteomics of the colonic mucosa in sub-healthy people with shapeless stool].

OBJECTIVE: To establish the 2-dimensional electrophoresis (2-DE) map in colonic mucosa in sub-healthy people with shapeless stool and healthy people, to identify the differential proteins by matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS), and to provide theoretical basis for the pathogenesis of intestinal mucosa in sub-healthy people with shapeless stool. METHODS: Two-DE was used to separate the total proteins from the intestinal mucosa in sub-healthy people (the sub-health group) with the shapeless stool and healthy volunteers (the control group). ImageMaster 2D Elite soft was applied to analyze the 2-DE images, and the differentially expressed protein spots between the 2 groups were identified by MALDI-TOF-MS, protein bank and information technique. RESULTS: We analyzed the average maps and obtained 517 protein spots in the sub-healthy group and 535 protein spots in the control group. Between the sub-healthy group and the control group, the mean of 366 protein spots was matched, and the matching rate was 70.79%. Ten differential protein spots were screened by MALDI-TOF-MS, and 8 were identified. Five out of the 8 spots were significantly decreased, while 3 out of the 8 were significantly increased. CONCLUSION: The proteomic expression in colonic mucosa of people with shapeless stool is significantly different from that of healthy people. Eight differential proteins such as aldehyde dehydrogenase 1A1 isoform 1, 3-hydroxy-3-methylglutaryl-coenzyme A synthase 2 (mitochondrial), γ-actin, annexin A5 possibly involve in the pathogenesis of sub-healthy people with shapeless stool.