摘要
目的利用RNA干扰技术沉默小鼠脾脏T淋巴细胞肿瘤坏死因子α诱导蛋白8样分子2(TIPE2)基因表达,观察TIPE2基因沉默对T淋巴细胞增殖及免疫活性的影响。方法磁珠分选T739小鼠脾脏T细胞,采用Western blot法筛选能有效沉默T淋巴细胞TIPE2基因的小干扰RNA(siRNA)序列。采用TIPE2特异性siRNA、阴性对照siRNA转染T细胞,在转染24 h后,流式细胞术检测T细胞表面CD69水平;转染72 h后,CCK-8法检测转染T淋巴细胞增殖情况,同时,ELISA检测转染T细胞上清液中白细胞介素2(IL-2)和γ干扰素(IFN-γ)分泌水平。结果成功筛选出特异性沉默TIPE2水平的siRNA序列,下调TIPE2基因表达后,T细胞CD69水平增加;T淋巴细胞增殖能力显著增强,IL-2和IFN-γ水平增加。结论下调TIPE2基因水平,促进T淋巴细胞增殖和免疫活性。
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 y （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.
出处
《细胞与分子免疫学杂志》
CAS
CSCD
北大核心
2016年第7期886-890,895,共6页
Chinese Journal of Cellular and Molecular Immunology
基金
重庆医科大学附属永川医院院内课题(YJQN201417)
