Citation: | SHAO Zhongxin, LI Shiying. Effect of propofol regulating macrophage polarization on airway inflammatory response and Toll-like receptor 4-NOD-like receptor protein 3 pathway in mice with bronchial asthma[J]. Journal of Clinical Medicine in Practice, 2025, 29(6): 13-19. DOI: 10.7619/jcmp.20245587 |
To investigate the effect of propofol (Pro) regulating macrophage polarization on airway inflammatory response and Toll-like receptor 4-NOD-like receptor protein 3 (TLR4-NLRP3) pathway in mice with bronchial asthma (BA).
Forty BA model mice were randomly divided into BA group, low-dose Pro (Pro-L) group, high-dose Pro (Pro-H) group, and Pro-H+lipopolysaccharide (LPS) group, with 10 mice in each group. Additionally, 10 normal mice were included as control group. Lung function indicators[peak expiratory flow (PEF) and ventilation volume (VE)], eosinophil (EOS), lymphocyte (LYM) and neutrophil (NEU) counts in bronchoalveolar lavage fluid, and interleukin (IL)-4, IL-10, IL-5 and IL-13 levels were measured in each group; flow cytometry was used to detect M1 and M2 macrophage levels and the proportions of T helper (Th) 1 and Th2 cells in peripheral blood; the enzyme-linked immunosorbent assay (ELISA) was used to detect serum interferon-γ (IFN-γ) and immunoglobulin E (IgE) levels; the hematoxylin-eosin (HE) staining was used to observe the pathological morphology of lung tissues; the Western blot was used to detect the protein expression of cleaved caspase-3, TLR4, NLRP3 and Caspase-1 in lung tissues.
Compared with the control group, mice in the BA group showed significant lung tissue damage, decreased PEF, VE, IL-10 and M1 macrophage levels, Th1 cell proportion, and IFN-γ level, and significant increased EOS, LYM, NEU counts, IL-4, IL-5, IL-13 and M2 macrophage levels, Th2 cell proportion, IgE, cleaved caspase-3, TLR4, NLRP3, and Caspase-1 protein expression levels (P < 0.05). Compared with the BA group, mice in the Pro-L and Pro-H groups showed significant lung tissue damage, increased PEF, VE, IL-10 and M1 macrophage levels, Th1 cell proportion, and IFN-γ level, and significant decreased EOS, LYM, NEU counts, IL-4, IL-5, IL-13 and M2 macrophage levels, Th2 cell proportion, IgE, cleaved caspase-3, TLR4, NLRP3, and Caspase-1 protein expression levels (P < 0.05). LPS significantly attenuated the improvement effect of Pro in BA mice (P < 0.05).
Pro may regulate macrophage polarization and immune response in BA mice by inhibiting the TLR4-NLRP3 signaling pathway, reducing the degree of inflammatory response, and improving lung tissue morphology and lung function.
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