Proteomic analysis of Helicobacter pylori in human gastritis and gastric cancer / 中南大学学报(医学版)

OBJECTIVE@#To establish 2-dimensional electrophoresis (2-DE) maps of Helicobac-ter pylori in human gastritis, and gastric cancer, to identify the differentially expressed proteins,and to discuss the role of bacterial factor in pathogenesis.@*METHODS@#The total proteins of Helicobacter pylori in human gastritis and gastric cancer were separated by immobilized pH gradient-based 2-DE. The differentially expressed proteins were screened by PDQuest analysis software and identified by peptide mass fingerprint based on matrix-assisted laser desorption/ionization time of flight mass spectrometry, and searched on database.@*RESULTS@#A well-resolved and reproducible 2-DE pattern of Helicobacter pylori was obtained from patients with human gastritis and gastric cancer. Fourteen differentially expressed proteins were identified, including proteins related to anti-oxidation,molecular chape-rones and detoxification, enzymes related to metabolism,proteins related to cytoarchitecture,and proteins related to signal conduction.@*CONCLUSION@#A well-resolved and reproducible 2-DE pattern of Helicobacter pylori in human gastritis and gastric cancer is established and differentially expressed proteins from these 2 diseases are identified. The differentiation of protein expression may play an important role in the pathogenesis of gastric cancer.

Establishment of 2-dimensional electrophoresis maps of peripheral blood mononuclear cells / 中南大学学报(医学版)

OBJECTIVE@#To establish the 2-dimensional electrophoresis(2-DE) profiles of peripheral blood mononuclear cells(PBMC) in patients with hepatocellular carcinoma(HCC) and health adults.@*METHODS@#The total proteins from PBMC in patients with HCC and healthy adult were separated by immobilized pH gradient-based 2-DE. The differential expression proteins were analyzed by PDQuest analysis software.@*RESULTS@#The well-resolved, reproducible 2-DE patterns of PBMC in patients with HCC and healthy adults were obtained. For HCC, the average spots of 2-DE maps were 1 206 +/- 48, and the average matching rate was 90.8%. For normal adults, the average spots were 1 123 +/- 37, and the average matching rate was 92.6%.@*CONCLUSION@#The well-resolved, reproducible 2-DE patterns of PBMC in patients with HCC and healthy adults are established. These proteomic analysis methods are useful to screen the potential biomarkers in the early diagnosis, treatment and prognosis monitor in patients with malignant tumor.