Characteristics and clinical significance of CD163+/CD206+M2 mono-macrophage in the bladder cancer microenvironment

Characteristics and clinical significance of CD163+/CD206+M2 mono-macrophage in the bladder cancer microenvironment

The tumor microenvironment may recruit monocytes, with a protumoral macrophage phenotype (M2) that plays an important role in solid tumor progression and metastasis. Therefore, it is necessary to understand the characteristics of these cells for cancer prevention and treatment. Bladder cancer tissue samples and paracarcinoma tissues samples were collected, and the expression of CD163+ cells in tumor tissues was observed. Then, we observed the expression of infiltrating CD45+CD14+CD163+ cell subset and analyzed the molecular expressions related to immunity and angiogenesis. C57/BL6 mice were inoculated subcutaneously, and dynamic changes of CD11b+F4/80+CD206+ mononuclear macrophages expression for tumor-bearing mice were detected. The results showed that the proportion of CD45+CD14+CD163+ mono-macrophage subset infiltrated by tumor tissue was significantly higher than that in paracarcinoma tissues. In bladder cancer tissue, the expression rate of CD40 in CD45+CD14+CD163- mono-macrophage subset was significantly lower than that in CD45+CD14+CD163+ mono-macrophage subset. Similar results were found in the paracarcinoma tissues. We found that, as the proportion of CD11b+F4/80+CD206+ mono-macrophages increased gradually, the difference was statistically significant. CD163+/CD206+ mono-macrophages in bladder cancer microenvironment are abnormally elevated, and these cells are closely related to tumor progression. CD40 may be an important molecule that exerts biological function in this subset.

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