猪A组轮状病毒主要蛋白的编码基因DNA疫苗联合免疫的研究
发布时间:2018-07-02 12:13
本文选题:猪A组轮状病毒 + VP ; 参考:《中国预防兽医学报》2017年04期
【摘要】:为研究猪A组轮状病毒(PRV-A)血凝蛋白(VP4)、群抗原蛋白(VP6)和中和抗原蛋白(VP7)编码基因疫苗联合免疫的效力,本研究将表达PRV-AVP4、VP6、VP7蛋白基因的真核表达质粒pVAX1-VP4、pVAX1-VP6、pVAX1-VP7以pVAX1-VP4+pVAX1-VP7(B组)和pVAX1-VP4+p VAX1-VP6+pVAX1-VP7(A组)设计试验组,分别以100μg/只经肌肉注射途径免疫BLAL/c小鼠,间隔2周以相同剂量、途径加强免疫,共免疫3次,免疫后不同时间采血,采用ELISA检测血清抗体。结果显示,B组在免疫后14 d和42 d检测到RV抗体阳性(P/N≥2),A组在免疫后14 d、28 d、42 d均检测到RV抗体阳性(P/N≥2);脾脏免疫相关细胞测定结果表明,A组的CD4~+/CD8~+T淋巴细胞比值和CD19~+B细胞数量均高于B组,两组与对照组相比差异显著(p0.05);淋巴细胞转化试验显示A组的SI值均高于B组,并且42 d时A、B两组差异显著(p0.05)。上述结果表明,3组分联合免疫的DNA疫苗可以诱导小鼠产生较强的体液和细胞免疫应答,为PRV-A的核酸疫苗研究奠定了基础。
[Abstract]:To study the efficacy of combined immunization of porcine group A rotavirus (PRV-A) hemagglutinin (VP4), group antigen protein (VP6) and neutralizing antigen protein (VP7). In this study, the eukaryotic expression plasmid pVAX1-VP4pVAX1-VP6 pVAX1-VP7 (group B) and pVAX1-VP4pVAX1-VP7 (group A) were designed to express PRV-AVP4VP6pVAX1-VP7 (group A), and BLALP-c mice were immunized by intramuscular injection of 100 渭 g / a of pVAX1-VP4pVAX1-VP7 (group A). The blood samples were collected at different time after immunization and the serum antibodies were detected by Elisa. The results showed that RV antibody positive (P / N 鈮,
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