小鼠CD4~+T细胞外泌体分离及鉴定

目的探讨CD4~+T细胞是否具有分泌外泌体的能力,以及CD4~+T细胞外泌体参与炎症及肿瘤免疫过程的可能。方法应用断颈处死的方法取出小鼠的脾脏,用磁珠分选的方法从小鼠脾脏细胞中分选出CD4~+T细胞,并尝试从培养基上清液中提取CD4~+T细胞的外泌体,在透射电镜下观察,后用PCR技术分析miR-23a、miR-214的表达情况。结果在透射电镜下能够观察到提取出的CD4~+T细胞外泌体,且用PCR技术能检测到小鼠CD4~+T细胞外泌体中miR-23a、miR-214这两个炎症及肿瘤相关的miRNA的表达。结论小鼠CD4~+T细胞有分泌外泌体的能力,且为CD4~+T细胞外泌体参与炎症及肿瘤相关过程提供了可能。

Isolation and identification of exosomes of CD4+T cells in mice

Objective To explore whether CD4⁺T cells in mice can secrete exosomes and the possibility of exosomes to participate in the inflammation and immune response process. Methods Spleen samples were taken from mice, and CD4⁺T cells were isolated from the spleen tissue using magnetic bead separation method. Exosomes of CD4⁺ T cells were extracted from the supernatant and observed under transmission electron microscope. PCR assay was used to detect the expression of miR-23a and miR-214. Results Exosomes were observed under elecron microscope,and the expression of miR-23a and miR-214 were detected by PCR assay.Conclusions CD4⁺T cells in mice can secrete exosomes,which offer possibility to participate in the inflammation and immune response.