Journal: Cell Reports Medicine
Article Title: Targeting mitochondrial complex I of CD177 + neutrophils alleviates lung ischemia-reperfusion injury
doi: 10.1016/j.xcrm.2025.102140
Figure Lengend Snippet: Enriched Cd177 + neutrophils are key contributors to lung ischemia-reperfusion injury in the mouse model (A) Nucleic acid staining and watershed-based segmentation for single-cell analysis. A representative image shows nuclei segmented using the watershed algorithm for spatial distribution analysis ( n = 2). (B) Spatial expression of the pan-immune marker Cd45 in lung tissue sections reveals regions of local immune cell infiltration. (C) Spatial mapping of Cd177 expression in lung tissues after IRI. Higher-magnification images (right) show colocalization of Cd177 with the inflammatory genes Pglyrp1 and Ltf . (D) Uniform manifold approximation and projection (UMAP) visualization showing Ly6g + Cd177 + neutrophil populations (red) compared with Ly6g + Cd177 − neutrophils (blue). The bubble heatmap on the right demonstrates enrichment of inflammatory Gene Ontology terms in Ly6g + Cd177 + cells. (E) Representative immunofluorescence images from the mouse left lung for Ly6G (green), CD177 (red), and citrullinated histone H3 (Cit-H3, white) showing NET formation in CD177 + neutrophils. Scale bar: 20 μm. (F) Reactive oxygen species (ROS) production was higher in CD177 + compared to CD177 − neutrophils from human samples (left) and in Cd177 flox/flox neutrophils compared to Cd177 flox/flox ; Ly6g Cre neutrophils from mice (right), with or without PMA stimulation. ( n = 5 per group). Neut, neutrophils; UT, untreated. (G) Quantification of MPO-DNA complexes showing increased NET formation in CD177 + compared to CD177 − human neutrophils (left) and in Cd177 flox/flox compared to Cd17 7 flox/flox ; Ly6g Cre mouse neutrophils (right) under PMA stimulation. Neut, neutrophils; UT, untreated. ( n = 5 per group). (H) Representative H&E staining of lung sections from Cd177 flox/flo x and Cd177 flox/flox ; Ly6g Cre mice under sham and IRI conditions. Quantification of acute lung injury scores (right) demonstrates significant injury in Cd177 flox/flox mice and minimal injury in Cd177 flox/flox ; Ly6g Cre mice after lung IRI. Scale bar: 50 μm. ( n = 6 per group). (I) Immunofluorescence staining revealing reduced NET infiltration (Ly6G, Cit-H3, and DNA/H1) in lung tissues of Cd177 flox/flox ; Ly6g Cre mice post-lung IRI. Scale bar: 20 μm. Data are shown as mean ± SD. Statistical significance was assessed by a two-sided Wilcoxon test adjusted with the Bonferroni method in (F), (G), and (H) and Fisher’s exact test in (D). ns, not significant; ∗∗∗ p < 0.001.
Article Snippet: PerCP-Cyanine5.5 anti-mouse/human CD45 Antibody , ThermoFisher , Cat#45-0451-82; RRID: AB_1107002.
Techniques: Staining, Single-cell Analysis, Expressing, Marker, Immunofluorescence