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Chinese Journal of Antituberculosis ›› 2022, Vol. 44 ›› Issue (5): 442-449.doi: 10.19982/j.issn.1000-6621.20210659

• Original Articles • Previous Articles     Next Articles

Plasma proteomics analysis of diabetic patients complicated with pulmonary tuberculosis by iTRAQ technology

WU Ming-qi1, YAN Shi-chun2, LIU Yu-qin3, GUO Xin3, WANG Mei-jie1, TIAN Jing1, HOU Shao-ying1()   

  1. 1Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin 150081, China
    2Division of Chronic Disease Control and Community Health, Heilongjiang Provincial Center for Disease Control and Prevention, Harbin 150030, China
    3Infectious Disease Hospital of Heilongjiang Province, Harbin 150500, China
  • Received:2021-11-18 Online:2022-05-10 Published:2022-05-04
  • Contact: HOU Shao-ying E-mail:hsy3982@163.com
  • Supported by:
    National Natural Science Foundation of China(81872615);Heilongjiang Provincial Natural Science Foundation of China(QC2018092)

Abstract:

Objective: To analyze the difference in plasma protein mass spectrum between diabetic (DM) patients and diabetic patients complicated with pulmonary tuberculosis (DM-PTB), screen potential protein biomarkers of DM-PTB, and to provide basis for further pathogenesis exploration. Methods: A retrospective study was conducted in 16 DM and 16 DM-PTB patients from Infectious Disease Hospital of Heilongjiang Province between January 1, 2017and January 1, 2018. The plasma protein mass spectra between the two groups were analyzed by isobaric tags for relative and absolute quantitation (iTRAQ) proteomics technology. The differential proteins were screened according to the following criteria: fold of protein expression change in DM-PTB compared to DM>1.2 or <0.83, and P<0.05. The differential proteins were analyzed by bioinformatics, such as Gene Ontology (GO) analysis, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis, and so on. Results: A total of 275 differentially expressed proteins were selected out, among which 111 were up-regulated and 164 were down-regulated in DM-PTB. GO analysis showed that the biological process with the largest number of differentially expressed proteins was cellular process (92.00%, 253/275), located in organelle (87.27%, 240/275) and the molecular function was binding (90.55%, 249/275). KEGG pathway analysis showed that the differentially expressed proteins were enriched into 26 pathways (false discovery rate <0.05) and focal adhesion was the pathway with the largest number of enrichment (22 proteins). Moreover, changes were also found in PI3K-Akt signaling pathway, cholesterol metabolism, platelet activation, phagosome, complement and coagulation pathways, et al., which related to glucose and lipid metabolism and immunity. Conclusion: In this study, differentially expressed proteins of DM-PTB patients were screened by iTRAQ quantitative proteomics, and they were involved in signaling pathways related to cellular activity, glucose and lipid metabolism, and immune regulation, suggesting that the changes of pathways mentioned above may be closely related to the pathogenesis of DM-PTB.

Key words: Diabetes mellitus, Tuberculosis,pulmonary, Isotope labeling, Proteomics, Plasma

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