体内稳定表达HER2多表位基因B16细胞系的建立

Establishment of a B16 cell line stably expressing genes encoding HER2 multi-epitope peptides in vivo

目的:建立体内稳定表达HER2多表位基因的小鼠黑色素瘤B16细胞系。方法:利用分子克隆技术构建真核表达载体pcDNA3-GFP-HER2,阳离子脂质体介导法将其稳定转染入B16细胞,G418克隆筛选及体内传代后,流式细胞术(FCM)分选出GFP-HER2表达阳性细胞群,对该群细胞进行无G418条件下的单克隆筛选并进行体内稳定性检测。结果:经限制性内切酶鉴定及序列分析,pcDNA3-GFP-HER2构建正确;最终建立的表达HER2基因B16细胞系体内传代后GFP-HER2阳性率高于90%。结论:成功建立了体内稳定表达HER2多表位基因的小鼠黑色素瘤细胞系,为其他体内稳定表达外源基因的转染细胞的建立提供了借鉴。

AIM： To establish a B16 ceil line stably expressing genes encoding HER2 multi-epitope peptides in vivo. METHODS： Eukaryotic expressing vector pcDNA3- GFP-HER2 was constructed by molecular cloning technique and transfected into B16 cells mediated by cationic liposome. After screened with G418, the transfected cells were passaged in vivo. The GFP-HERT. positive cells were isolated from tumor burdening mice by flow cytometry （FCM） sorting, and then monoclonized in the absence of G418 to obtain a B16 cell line stably expressing genes encoding HER2 multi-epitope peptides in vivo. This cell line was then identified after being passaged in vivo. RESULTS： Restriction endonulease analysis and DNA sequencing showed that the pcDNA3-GFP-HER2 was constructed and a B16 cell line stably expressing genes encoding HER2 multi-epitope peptides in vivo was obtained successfully. The GFP-HER2 positive proportion maintained higher than 90% after being passaged in vivo. CONCLUSION： A B16 cell line stably expressing genes encoding HER2 multi-epitope peptides is established successfully, which would provide a method to establish other cell lines stably expressing exogenous genes.