LncARSR promotes the development of RCC through transmit by exosomes to macrophages. A- B. Through animal fluorescence quantitative analysis, we found that the MFI of nude mouse tumors in exosome pretreatment group was significantly higher than the MFI value in no pretreatment group, lncARSR-knockdown pretreatment group, and the control after 3 weeks pretreatment (***P<0.001). C-D. We detected the expression of F4/80, CD206 and Ki67 in tumor specimens of nude mice by immunohistochemistry. The expression levels of F4/80, CD206 and Ki67 of tumor tissue were higher in exosome pretreatment group than those in lncARSR-knockdown pretreatment group, no pretreatment group and the control (**P<0.01, ***P<0.001).