Journal of Capital Medical University ›› 2020, Vol. 41 ›› Issue (1): 131-136.doi: 10.3969/j.issn.1006-7795.2020.01.025

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Oxidative stress mediates the effect of NLRP3 inflammasome on chronic obstructive pulmonary disease

Liu Ping, Lou Ke, Weng Long, Li Hui, Tang Yuling   

  1. Department of Respiratory Medicine, Changsha First Hospital, Changsha 410035, China
  • Received:2019-08-22 Online:2020-02-21 Published:2020-02-13

Abstract: Objective The correlation among nucleotide binding oligomerization domain like receptor protein 3(NLRP3), malondialdehyde(MDA), superoxide dismutase(SOD) and forced expiratory volume in the first second% pred(FEV1% pred) was analyzed by detecting the levels of SOD, MDA and the expression level of NLRP3 mRNA in serum of COPD patients, so as to explore the influence of oxidative stress-mediated NLRP3 inflammatory body activation on COPD. Methods Selection of Changsha's Hospitals affiliated to Nanhua University in June 2017 to June 2018, 90 cases of COPD patients including 60 patients with acute chronic obstructive pulmonary disease (AECOPD).According to pulmonary function in patients with AECOPD group is divided into weight very restructuring and light-medium group, 30 cases in each group.Selected 30 COPD patients who reached the level remission after treatment symptoms and selected the other 30 cases who got healthy subjects through physical examination as a control group.Serum MDA, SOD levels and NLRP3 mRNA expression levels in AECOPD group, COPD stable period group, control group were compared. Otherwise, serum MDA, SOD levels and NLRP3 mRNA expression levels in weight-very restructuring group, light-medium group and healthy control group were compared.Pearson correlation analysis was used to analyze the correlation between serum MDA and SOD levels, NLRP3 mRNA expression in peripheral blood lymphocytes, and FEV1% pred in COPD patients.Results Serum MDA level in AECOPD group was higher than that in COPD stable period group and COPD stable period group was higher than that in healthy control group (P<0.05). Serum SOD level in AECOPD group was lower than that in COPD stable period group and COPD stable period group was lower than that in healthy control group (P<0.05).The expression level of NLRP3 mRNA in peripheral blood lymphocytes in AECOPD group was higher than that in COPD stable period group and COPD stable period group was higher than that in healthy control group (P<0.05). Serum MDA level in the weight-very restructuring group was higher than that in the light-medium group and the light-medium group was higher than that in the healthy control group (P<0.05). Serum MDA level in the weight-very restructuring group was lower than that in light-medium group and light-medium group was lower than that in the healthy control group (P<0.05). The expression level of NLRP3 mRNA in peripheral blood lymphocytes in weight-very restructuring group was significantly higher than that in the light-medium group and the light-medium group was higher than that in the healthy control group (P<0.05). The result of pearson correlation analysis showed that serum MDA level in COPD patients was positively correlated with NLRP3 mRNA expression, with a correlation coefficient r of 0.64(P<0.05). Serum SOD level was negatively correlated with NLRP3 mRNA expression in COPD patients, with a correlation coefficient r of -0.90(P<0.05). In COPD patients, FEV1%pred was negatively correlated with NLRP3 mRNA expression, and the correlation coefficient r was -0.78 (P<0.05). Conclusion Oxidative stress and NLRP3 inflammatory corpuscle are involved in the pathogenesis of COPD. The increasing of oxidative stress and NLRP3 mRNA expression were correlated with exacerbations of COPD. Oxidative stress-mediated activation of NLRP3 inflammatory corpuscle has an impact on the progression of COPD.

Key words: oxidative stress, NLRP3 inflammasome, chronic obstructive pulmonary disease(COPD)

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