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The anti-tumor effect of murine EL-4 tumor cells transfected with both of B7 and IL-6 gene
Author(s): 
Pages: 354-357
Year: Issue:  4
Journal: JOURNAL OF BEIJING MEDICAL UNIVERSITY(HEALTH SCIENCES)

Keyword:  转染疫苗/药理学白细胞介素6药物协同作用胸腺瘤;
Abstract: 目的:探讨IL-6和B7双基因转染的小鼠肿瘤疫苗是否具有协同的抗肿瘤效应.方法:利用含小鼠B7分子和人IL-6分子cDNA的逆转录病毒载体pLmB7SN和pLhIL-6SN分别转染包装细胞株CRIP,经G418抗性筛选后以含有B7或IL-6外源基因的病毒颗粒感染小鼠EL-4胸腺瘤细胞,观察EL-4-IL-6、EL-4-B7、EL-4-IL-6+B7细胞在同基因宿主体内的致瘤性及作为抗肿瘤疫苗的能力.结果:相对亲本肿瘤细胞EL-4而言,单基因和双基因转染的EL-4细胞在小鼠体内的生长速度均明显减慢,小鼠存活时间均有一定延长,3种转基因的EL-4细胞经X-射线灭活后免疫小鼠,虽均未能阻止随后接种的EL-4细胞的生长,但小鼠存活时间都明显延长,IL-6和B7双基因转染的EL-4肿瘤细胞在抗肿瘤活性方面与IL-6或B7单基因转染的EL-4细胞差异无显著性.结论:与单基因表达疫苗比较,双基因表达疫苗没有表现出协同的抗肿瘤效应.
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