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1 result(s) for "董磊 刘娟 马红雨 全首祯 吕建晓 李莹 朱美财"
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重组蛋白PSCA-HSP70的免疫活性及抗肿瘤效应观察
目的探讨重组前列腺干细胞抗原(PSCA)-热休克蛋白70(HSP70)融合蛋白对前列腺肿瘤模型小鼠的免疫激活作用及抗肿瘤活性。方法健康雄性C57BL/6小鼠25只,随机均分为PSCA组、HSP组、PSCA+HSP组、PSCAHSP组及PBS组(n=5)。小鼠皮下注射1×10^6个前列腺肿瘤细胞(RM-PSCA/Luc细胞),3d后分别采用相应重组蛋白进行免疫(100μg/只),2周后采用相同剂量加强免疫1次,观察肿瘤生长及小鼠存活状况。加强免疫后10d处死动物,采用ELISPOT法和流式细胞术检测PSCA特异性T细胞反应,ELISA法检测PSCA特异性抗体水平。结果 ELISPOT法检测显示,PSCA-HSP组分泌IFN-γ的CD8+T细胞数明显高于其他各组(P〈0.05);流式细胞术检测结果显示,PSCA-HSP组CD8+/IFN-γ+T细胞数明显高于其他各组(P〈0.05);ELISA检测显示,PSCA、PSCA+HSP、PSCA-HSP均可诱导产生PSCA特异的体液免疫反应,且3组间抗体水平差异无统计学意义(P〉0.05)。PSCA-HSP组肿瘤体积明显小于其余各组,小鼠存活时间明显长于其余各组(P〈0.05)。结论 HSP70是一种效应显著的分子伴侣,重组PSCA-HSP70融合蛋白在前列腺癌的治疗中具有重要的潜在应用价值。