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表达靶向癌胚抗原的嵌合受体的慢病毒载体构建及初步应用

, PP. 1096-1101

Keywords: 嵌合抗原受体,肿瘤免疫治疗,CEA,慢病毒

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Abstract:

目的构建表达靶向癌胚抗原(carcinoembryonicantigen,CEA)的嵌合抗原受体(chimericantigenreceptor,CAR)的慢病毒载体LV-EF1α-CEA-2A-GFP-WPRE,研究该载体感染T淋巴细胞后嵌合抗原受体的表达以及对CEA阳性肿瘤细胞系的杀伤作用。方法利用常规分子克隆技术从含靶向CEA的单链化抗体的载体上得到抗CEA抗体的编码序列,通过测序鉴定,采用酶切将基因片段插入慢病毒载体中。慢病毒载体感染T淋巴细胞后,通过非变性非还原Westernblot、流式细胞术检测CEA-CAR在T淋巴细胞中的表达,体外杀伤实验检测对CEA阳性肿瘤细胞系的杀伤效果。结果测序结果显示CEA-CAR的序列正确,酶切结果显示慢病毒载体LV-EF1α-CEA-2A-GFP-WPRE构建正确;感染T淋巴细胞后CEA-CAR阳性表达率为62.8%;可有效杀伤CEA阳性肿瘤细胞系(P<0.01)。结论成功构建了表达靶向CEA的嵌合抗原受体LV-EF1α-CEA-2A-GFP-WPRE的慢病毒载体,该嵌合抗原受体可在T细胞中正确表达,并有效杀伤CEA阳性肿瘤细胞。

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