Journal: JCI Insight
Article Title: Glycoprotein NMB mediates bidirectional GSC-TAM interactions to promote tumor progression
doi: 10.1172/jci.insight.187684
Figure Lengend Snippet: ( A ) Strategy for identification of the overlapped genes that were upregulated in both GBM-associated microglia and bone marrow–derived macrophage (BMDMs) compared with normal monocytes. The analysis was based on RNA-Seq data ( GSE86573 ) from GBM-associated microglia/BMDMs isolated from the GL261 tumor model and RCAS tumor model and normal microglia and monocytes. ( B ) The expression pattern of genes in CD45 – GBM cells and tumor-associated immune cells (e.g., BMDMs, microglia, neutrophils, CD4 + T cells, and CD8 + T cells) isolated from human GBM tumors based on the Brain TIME dataset . ( C ) Coimmunofluorescence staining for GPNMB (red) and F4/80 (macrophage marker, green) or CX3CR1 (microglia marker, green) in CT2A tumors implanted in C57BL/6 mice. Scale bar: 50 μm. ( D – G ) Flow cytometry analysis of GPNMB expression in CD11b + CD45 hi CD68 + macrophages ( D and E ) isolated from bone marrow and CD11b + CD45 lo CX3CR1 + microglia ( F and G ) isolated from brain tissues of tumor-free C57BL/6 mice and CT2A and QPP7 tumor-bearing C57BL/6 mice. n = 3–6 independent samples. One-way ANOVA test. ( H – K ) Flow cytometry analysis of GPNMB expression in CD11b + CD45 hi CD11c + DCs, CD11b + CD45 lo CX3CR1 + microglia (Total MG), CD11b + CD45 lo CX3CR1 + CD206 + microglia (CD206 + MG), CD11b + CD45 lo CX3CR1 + CD206 – microglia (CD206 – MG), CD11b + CD45 hi CD68 + macrophages (Total MΦ), CD11b + CD45 hi CD68 + CD206 + macrophages (CD206 + MΦ), CD11b + CD45 hi CD68 + CD206 – macrophages (CD206 – MΦ), CD11b + CD68 + Ly6G lo Ly6C hi monocytic immature myeloid cells (M-IMCs), and CD11b + CD68 + Ly6G hi Ly6C lo polymorphonuclear immature myeloid cells (PMN-IMCs) isolated from QPP7 tumors ( H and I ) and CT2A tumors ( J and K ) implanted in C57BL/6 mice. n = 3 independent samples. One-way ANOVA test. ( L ) Immunoblots for GPNMB in lysates of Raw264.7 macrophages and SIM-A9 microglia treated with the conditioned media (CM) of QPP7 GSCs for 24 hours. ( M ) Immunoblots for GPNMB in lysates of THP-1 macrophage and HMC3 microglia treated with the CM of GSC272 cells for 24 hours. ** P < 0.01, *** P < 0.001.
Article Snippet: After washing, cells were continuously cultured for 3–5 days with GPNMB recombinant protein treatment (R&D Systems, 2550-AC) or macrophage/microglia-derived CM in the dark and used for flow cytometry analysis.
Techniques: Derivative Assay, RNA Sequencing, Isolation, Expressing, Staining, Marker, Flow Cytometry, Western Blot