摘要
目的探讨含一种密码子优化HPV16E6E7突变融合基因的树突状细胞(DC)疫苗的抗相关肿瘤免疫效果。方法对经密码子优化的HPV16E6E7融合基因的关键位点进行突变,获得在E6L57G、C113R及E7C24G、E26G、C58G位点突变的HPV160mfE6E7基因,并检测了该基因的去致瘤性;利用含HPV16omfE6E7重组非复制型腺病毒感染树突状细胞构建DC疫苗(DC—HPV16omfE6E7),并利用动物模型对该疫苗进行了抗相关肿瘤免疫研究。结果HPV16omfE6E7基因对NIH3T3细胞无转化作用,含该抗原基因的DC—HPV16omfE6E7疫苗有效激发特异性CTL反应,与对照组相比,疫苗免疫的小鼠成瘤时间推迟,并且成瘤率明显下降,成活率显著增加。结论DC—HPV16omfE6E7疫苗可望用于抗肿瘤免疫治疗。
Objective To study the anti-tumor immune effect of the dendritic cells (DC) containing a codon optimized HPV16 E6E7 mutation fusion gene ( HPV16 omfE6E7). Methods HPV16 omfE6E7 was generated by site-directed mutagenesis at L57G, C113R for the E6 protein and C24G, E26G, C58G for the E7 protein ofHPVl6 of E6E7 fusion gene (HPV16 ofE6E7) , and a DC vaccine (DC-HPV16 omfE6E7E6E7) was constructed by infection of recombinant adenovirus expressing HPV16 omfE6E7E6E7 gene to prime dendritic cells. Results The HPV16 omfE6E7 gene constructed in this work showed a lost in the transformation capability to NIH 3T3 cells. DC vaccine containing HPV16 omfE6E7E6E7 antigen can stimulate specific CTL response, a significant decrease in the rate of tumor formation, and an intensively increase in the survival rate in the immunized mice. Conclusion The result indicated that the DC-HPV16 omfE6E7 vaccine constructed in this study has potential application to immunotherapy of HPV positive cancer.
出处
《中华实验和临床病毒学杂志》
CAS
CSCD
2015年第4期338-341,共4页
Chinese Journal of Experimental and Clinical Virology
基金
国家“863”项目(2012AA02A404)
关键词
乳头状瘤病毒
人
突变
基因
树突细胞
疫苗
抗原
病毒
肿瘤
Papillomavirus,human
Mutation
Genes
Dendritic cells
Vaccines
Antigens, viral, tunor