重组诺如病毒GⅠ.1和GⅡ.4型类病毒颗粒免疫效果初步评价

Chinese journal of microbiology and immunology(2016)

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Abstract
目的:初步评价基于汉逊酵母表达系统的重组诺如病毒( norovirus,NoV) GⅠ.1和GⅡ.4型VP1蛋白类病毒颗粒( virus-like particles,VLPs)的免疫效果。方法将纯化后VLPs经SDS-PAGE和Western blot分析及鉴定,透射电镜观察颗粒形态,动态光散射仪分析颗粒粒径大小及分布情况。将GⅠ.1和GⅡ.4型VLPs按照不同的免疫方案免疫BALB/c小鼠,组织血清抗原( histo-blood group antigen,HBGA)-VLPs阻断试验检测50%阻断滴度(50% of blocking titer,BT50)。结果纯化后重组GⅠ.1和GⅡ.4型VP1蛋白纯度大于90%,Western blot分析可见特异性条带。 VLPs直径为30~50 nm,界限清晰,颗粒直径与天然病毒颗粒接近,颗粒大小分布均一。免疫小鼠血清中佐剂组BT50明显高于无佐剂组。结论应用含铝佐剂的GⅠ.1和GⅡ.4型VP1 VLPs 免疫小鼠,诱生了较好的HBGA阻断抗体,可作为诺如病毒疫苗的组分抗原。
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Key words
Norovirus (NoV),Virus-like particles (VLPs),Histo-blood group antigen (HBGA)
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