Journal: Respiratory Research
Article Title: Recombinant SARS-Cov-2 spike protein S1 subunit upregulates P2 × 7-NLRP3 leading to macrophage pyroptosis promoting acute lung injury
doi: 10.1186/s12931-026-03513-9
Figure Lengend Snippet: Effect of MCC950 intervention on lung histopathology, pulmonary edema, tight junction protein expression, NLRP3 inflammasome-associated protein, GSDMD-NT and inflammatory factors in lung tissue, and IL-1β and IL-18 in BALF of the K18-hACE2 mice. A HE staining of mouse lung tissues (magnification × 200; scale bar, 50 μm; magnification × 400; scale bar, 20 μm); ( B ) pathological damage score of mouse lung tissues; ( C ) lung coefficients of mouse lung tissues; ( D ) total protein concentration of mouse BALF. All data are expressed as mean ± standard deviation. n = 6. * p < 0.05 vs. control group. # p < 0.05 vs. S1SP group. E Western blot for the expression of tight junction proteins in mouse lung tissues; ( F ) Comparison of gray scale values of ZO-1 in each group; ( G ) Comparison of gray scale values of Occludin in each group; ( H ) Comparison of gray scale values of Claudin5 in each group. Data are presented as mean ± SD. * p < 0.05 vs. control group. # p < 0.05 vs. S1SP group; ( I ) Western blot detection of the expression of NLRP3 inflammasome-associated protein, GSDMD-NT , and the inflammatory factors IL-1β and IL-18 in the lung tissues of mice; ( J - P ) Quantification of relative protein expression of NLRP3 inflammasome-associated protein, GSDMD-NT , and the inflammatory factors IL-1β and IL-18 in the various groups; ( Q ) Immunofluorescent imaging to detect the expression level of expression levels of ASC in lung tissues of mice in each group (magnification × 400; scale bar = 20 μm); ( R ) Protein levels of IL-1β in lung tissues of mice in each group were analyzed by Immunofluorescence imaging. (magnification × 400; scale bar = 20 μm). Data are presented as mean ± SD. * p < 0.05 vs. control group. # p < 0.05 vs. S1SP group. Effect of MCC950 intervention on IL-1β and IL-18 in BALF of mice in each group; ( S ) Elisa assay for inflammatory factor IL-1β in BALF of mice in each group; ( T ) Elisa assay for inflammatory factor IL-18 in BALF of mice in each group. Data are presented as mean ± SD. * p < 0.05 vs. control group. # p < 0.05 vs. S1SP group
Article Snippet: Mouse IL-1β ELISA kit (Boster, Catalog # EK0394) and mouse IL-18 ELISA kit (Beyotime, Catalog # PI553) were used to measure IL-1β and IL-18 in the mouse BALF.
Techniques: Histopathology, Expressing, Staining, Protein Concentration, Standard Deviation, Control, Western Blot, Comparison, Imaging, Immunofluorescence, Enzyme-linked Immunosorbent Assay