生物可降解微球作为乙型肝炎基因免疫佐剂的研究  

BIODEGRADABLE POLY (D,L-LACTIDE-CO-GLYCOLIC ACID) MICROSPHERES USED AS ADJUVANT IN DNA IMMUNIZATION OF HEPATITIS B VIRUS S GENE

作　　者：龚非[1] 姜述德[1] 李卫东[1] 陈俊英[1] 

机构地区：[1]中国医学科学院医学生物学研究所,昆明650118

出　　处：《微生物学通报》2001年第2期68-72,共5页Microbiology China

摘　　要：探讨生物可降解微球对基因免疫的增强作用。采用有机溶剂蒸发法制备聚乳酸聚乙醇酸共聚 物（ＰＬＧＡ）微球，构建含有乙型肝炎病毒表面抗原Ｓ基因的ｐＲＣ－ＣＭＶ真核表达载体，用微球与基因 载体共孵育法制备其混合物。肌肉注射免疫Ｂａｌｂ／ｃ小鼠。结果表明：微球注射组的血清抗体滴度达到 ｌ：１６００，其效果与乙型肝炎病毒表面抗原加铝佐剂注射组相近，而裸ＤＮＡ注射组没有反应。说明了 生物可降解微球可显著的提高基因免疫的免疫反应。Study the immunological adjuvant function of biodegradable microspheres for DNA immunization. Empty poly (D, L-lactide-co-glycolic acid) microspheres were prepared using the water- inoil-in-water (w-o-w) technique; A plasmid DNA pRc-CMV encoding hepatitis B virus S antigen was constructed; The mixture of the microspheres and the plasmid DNA was prepared by incubation method. The mixture was administered to Balb/c mice by intramuscular injection. Result: The high antibody titer(1:1600) of intramuscular injection of the mixture of microspheres and the plasmid DNA was obtained, similar to that of intramuscular injection of the mixture of AL(OH)3 and hepatitis B virus S antigen; while intramuscular injection the plasmid DNA elicited no serum antibody respones. Conclusion: biodegradable microspheres may be used as an good adjuvant for DNA immunization.

关 键 词：聚乳酸聚乙醇酸共聚物 DNA免疫 乙型肝炎病毒表面抗原 免疫佐剂 

分 类 号：R512.62[医药卫生—内科学]