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IL-12协同B7-1转基因细胞增强C57BL/6小鼠的抗肿瘤免疫

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摘要 目的应用逆转录病毒构建了IL-12,B7-1和GM-CSF表达载体,以研究基因修饰的肿瘤细胞的癌疫苗作用。方法将三种表达载体分别转染EL-4胸腺瘤细胞并研究了该基因导入细胞的抗肿瘤免疫效果。结果当接种了EL-4/IL-12细胞后,在C57BL/6同系鼠中其基因导入细胞的肿瘤原性比较EL-4/Wt和EL-4/Neo组明显减少(P<0.01)。在EL-4/IL-12被排斥后,体内试验中实验动物诱发了抗EL-4/Wt的系统性、保护性免疫,^51Cr释放测定中,获得一个较强的抗EL-4/Wt和一个较弱的抗同系Lewis肿瘤细胞的CTL活性,体内淋巴细胞消除分析的结果提示减少的肿瘤原性主要依赖于CD4^+、CD8^+和NK细胞。用EL-4/IL-12细胞进行疫苗治疗比较用EL-4/Neo细胞能有效地延缓已建立的EL-4/Wt肿瘤细胞的生长(P<0.005),EL-4/IL-12和EL-4/B7-1联合比用单一的转基因细胞增强了治疗效果(P<0.005)。结论应用IL-12进行血液肿瘤的治疗是有效的,IL-12和B7-1联合使用在未来人类癌症的治疗中亦可有一定的应用前景。
出处 《世界今日医学杂志》 2000年第3期193-197,共5页 World JOurnal of Medicine Today
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