POU2F1 induces the immune escape in lung cancer by up-regulating PD-L1.

作者: Tianyi Wang , Fei Li , Yinpeng Huang

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摘要: Purpose The aim was to research the POU2F1 related genes and mechanism during progress of immune escape lung cancer. Methods Lung cancer cell lines (H1993, HCC827, A549, H2228, H3122 H1975) Human normal epithelial line (BEAS-2B) were involved in this study. Overexpression or knockdown processed cells. POU2F1, PD-L1 CRK expression cells detected by WB RT-PCR. Flow cytometry immunofluorescence used detect on surface. Luciferase reporter promoter activity CRK. C57BL/6 mice models with knocked down constructed. After tumor formation, anti-PD-1 administered suppressing ability. IHC assay showed number intratumoral CD3+, CD8+, GranzB+ T Results positively correlated lines. promoted level transcription activated CRK, further PD-L1. Knockdown efficacy Anti-PD-1. In addition, growth ability decreased after down. Cytotoxic effector cytokines levels, suppressive chemokines interleukin increased, while IL17a when Conclusion activates promotes PD-L1, finally improves

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