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exosome derived S100A4 promotes NSCLC progression in vivo. A–C. Tumor size, weight, and volume of mice injected with A549 cells treated with si-ctrl or si-S100A4 and H1299 cells transfected with oe-ctrl or oe-S100A4. D–F. HE, Ki-67, and TUNEL staining in tumor tissues. G. Immunohistochemistry assay for detecting S100A4 and PD-L1 expressions. *P < 0.05 vs PBS, #P < 0.05 vs A549 Ex or si-ctrl Ev.
