期刊
CELLULAR & MOLECULAR BIOLOGY LETTERS
卷 24, 期 1, 页码 -出版社
BMC
DOI: 10.1186/s11658-019-0190-9
关键词
Diffuse large B-cell lymphoma; miR-214; PD-L1; Proliferation; Invasion; T cells
Objective: We explored the role and mechanism of miR-214 involvement in the progression of diffuse large B-cell lymphoma (DLBCL). Methods: The expression levels of miR-214 and PD-L1 in human DLBCL cell lines and in tissue samples from patients with DLBCL were determined using quantitative RT-PCR. The dual-luciferase reporter assay was employed to determine the correlation between the expressions of miR-214 and PD-L1. Cell viability, invasiveness and apoptosis were respectively examined in cells of the DLBCL line OCI-Ly3 using CCK-8, transwell and flow cytometry assays. The expression level of PD-L1 was determined via immunoblotting. Inflammatory cytokine secretion was determined via enzyme-linked immune sorbent assay (ELISA). Results: miR-214 was downregulated and PD-L1 was upregulated in DLBCL tissues and cell lines in comparison to normal adjacent tissues or normal B-cell. This indicates a negative correlation in the expression levels. Overexpression of miR-214 inhibited cell viability and invasion and induced apoptosis of OCI-Ly3 cells. Moreover, miR-214 was shown to target PD-L1 mRNA by binding to its 3'-untranslated region (UTR). Knockdown of PD-L1 attenuated the malignant phenotype of OCI-Ly3 cells. Overexpression of miR-214 inhibited tumor growth by targeting PD-L1 in vivo. Conclusion: By targeting PD-L1, miR-214 regulates the progression of DLBCL in vitro and in vivo.
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