Journal: Signal Transduction and Targeted Therapy
Article Title: Genetically programmable cell membrane-camouflaged nanoparticles for targeted combination therapy of colorectal cancer
doi: 10.1038/s41392-024-01859-4
Figure Lengend Snippet: Both in vitro and in vivo, MPB-3BP@CM NPs-induced macrophage polarization and macrophage phagocytosis. The flow cytometric analysis was performed to quantify both M1-like macrophages (CD86+) ( a ) and M2-like macrophages (CD206+) ( b ) were quantified in RAW264.7 gating on F4/80 + CD11b+ cells (I: PBS, II: CM NPs, III: MPB NPs + laser, IV: 3BP, V: MPB-3BP@CM NPs, VI: MPB-3BP@CM NPs + laser). ELISA measurement of the secretion of IL-6 ( c ), IL-12 ( d ), IL-10 ( e ), and TGF-β ( f ) in different treatment groups. g Quantification analysis reveals that MPB-3BP@CM NPs-mediated CD47 blockade enhances phagocytosis of HCT116-EGPF cancer cells by BMDMs in vitro. h Quantification analysis of the phagocytosis of HCT116-EGPF cancer cells by BMDMs after CD47 blockade with varying concentrations of MPB-3BP@CM NPs in vitro. i Schematic illustration showing the timelines of treatment. Quantification analysis of M1-like macrophages (CD86+) ( j ) and M2-like macrophages (CD206+) ( k ) in tumor gating on F4/80 + CD11b+ cells (i: saline, ii: MPB NPs + laser, iii: 3BP, iv: CM NPs, v- MPB-3BP@CT NPs + laser, vi: MPB-3BP@CM NPs, vii: MPB-3BP@CM NPs + laser). Secretion levels of IL-6 ( l ), IL-12 ( m ), IL-10 ( n ), and TGF- β ( o ) in tumor tissues of mice after different treatments. p Representative image and quantitative analysis of immunofluorescence staining of the tumor sections showing infiltrated CD86 + F4/80+ macrophage cells. Scale bar = 50 μm. q Representative flow cytometry plots of CFSE + F4/80 + CD11b+ cells in tumor gating on F4/80 + CD11b+ cells, the phagocytosis efficiency is represented by the percentage of CFSE + F4/80 + CD11b+ cells in total F4/80 + CD11b+ cells. All data were presented as mean ± SD ( n ≥ 3)
Article Snippet: Following 48 h of incubation, RAW264.7 macrophages from the upper chamber were acquired and stained with fluorescence-conjugated anti-mouse CD11b (eBioscience, FITC), CD206 (eBioscience, PE-cyanine 7), CD86 (eBioscience, APC), F4/80 (eBioscience, PE) antibodies.
Techniques: In Vitro, In Vivo, Enzyme-linked Immunosorbent Assay, Saline, Immunofluorescence, Staining, Flow Cytometry