[Down-regulation of TIPE2 promotes the proliferation and immune activity of T lymphocytes]

Objective To utilize specific small interfering RNA (siRNA) to silence the expression of tumor necrosis factor α-induced protein 8 like-2 (TIPE2) gene of T lymphocytes and investigate the effect of TIPE2 targeting siRNA on T lymphocyte proliferation and immune function. Methods Mouse spleen T lymphocytes were sorted by magnetic beads. Western blotting was used to screen and validate an effective siRNA to silence the TIPE2 gene expression of T lymphocytes. Twenty-four hours after transfection with the siRNA into T lymphocytes, the expression of CD69 in each group was detected by flow cytometry. Seventy-two hours after transfection, the proliferation of the T lymphocytes was measured with CCK-8 assay; meanwhile, the secretion levels of interleukin 2 (IL-2) and interferon γ (IFN-γ) in each group were measured by ELISA. Results We obtained TIPE2 targeting siRNA sequences and effectively silenced the expression of TIPE2 gene. After TIPE2 gene expression was down-regulated, the expression of the CD69 on T lymphocytes increased, and the proliferation of T lymphocytes and the secretion of IL-2 and IFN-γ were enhanced. Conclusion Down-regulation of TIPE2 gene expression can promote the T lymphocyte proliferation and immune activity.