目的 :构建人白细胞介素 7(h IL - 7)的真核表达载体。方法 :从人脾脏组织的总 RNA中 ,用 RT- PCR方法扩增出编码成熟 h IL- 7的 c DNA,将其克隆于 p MD18- T质粒中 ,并进行序列测定。再将 h IL - 7c DNA以正义及反义插入真核、原核双重表达载体 p BK- CMV质粒 ,转化至大肠杆菌 DH5α。最后将表达的 lacz- h IL - 7重组蛋白行SDS- PAGE电泳 ,并作考马斯亮蓝染色分析 ,western blot鉴定。结果 :h IL- 7序列测定结果与预期一致。p BK-CMV- h IL- 7(正义插入 )的克隆表达重组蛋白 ,western blot证实此蛋白为 IL- 7。结论 :成功构建了 h IL- 7的真核表达载体 ,为进一步研究 h IL- 7的抗肿瘤作用创造了条件。
Objective To investigate the growth inhibition of interleukin 2 receptor (IL 2R) gene transduced peripheral blood lymphocytes (PBLs) on human ovarian cancer cells Methods Interleukin 2 (IL 2) and IL 2R genes were transfected into human ovarian cancer cell line 3AO and PBLs, respectively, using the same Fugene vector Twenty four hours later transfected and nontransfected PBLs were cocultured with transfected and nontransfected 3AO for 48 hours Cytotoxity of PBLs on 3AO was detected by the MTT assay Results The morphology of IL 2 transduced 3AO and IL 2R transduced PBLs remained unchanged 3AO cells could be transfected with the IL 2 gene and expressed IL 2 mRNA, and PBLs could be transfected with the IL 2R gene and expressed IL 2R mRNA IL 2 transduced 3AO cells enhanced their response to the cytotoxity of PBLs Furthermore, growth inhibition of PBLs to 3AO cells increased significantly when the IL 2R was transfected into PBLs and when the IL 2 gene was transfected into 3AO cells and the two were combined Conclusions IL 2R gene transduced PBLs are able to enhance their cytotoxity on IL 2 gene transduced ovarian cancer cells This method may be a new way to investigate IL 2 gene therapy for ovarian cancer
