Rhabdoviral N-Fusion Proteins as Carrier for Foreign Antigens

    公开(公告)号:US20080311147A1

    公开(公告)日:2008-12-18

    申请号:US11568006

    申请日:2005-04-19

    IPC分类号: A61K39/00 C12N15/00 A61P31/00

    摘要: Rabies virus (RV) nucleoprotein (N) tightly encapsidates the genomic and antigenomic RNA thereby forming the ribonucleoprotein (RNP) complex. Antigens presented in a rigid and repetitive organization are sufficient to activate B cells to proliferate. In addition to the repetitive organization, it has been shown that RV N protein induces potent T-helper responses resulting in long-lasting and strong humoral immune responses against RV. The possibility to directly manipulate the genome of RV allows us to examine whether the immunogenicity of foreign antigens can be enhanced via incorporation into the RNP structure. A recombinant RV expressing an RV N-green fluorescent protein (GFP) fusion protein. The chimeric N-GFP fusion protein was efficiently expressed and incorporated into RV RNP and virions. Moreover, the recombinant RNP induces a strong humoral immune response against GFP in mice. In contrast, mice inoculated with GFP alone or a combination of wild-type RV RNPs and GFP did not trigger any GFP-specific humoral responses using the same immunization schedule. These results indicate the usefulness of RV-based vectors as killed vaccines against other infectious diseases.

    摘要翻译: 狂犬病病毒(RV)核蛋白(N)紧密地包裹基因组和反基因组RNA,从而形成核糖核蛋白(RNP)复合物。 呈现在刚性和重复组织中的抗原足以激活B细胞增殖。 除了重复组织之外,已经显示RVN蛋白诱导有效的T辅助反应,导致针对RV的持久和强烈的体液免疫应答。 直接操纵RV基因组的可能性使得我们能够检查外源抗原的免疫原性是否可以通过纳入RNP结构来增强。 表达RVN-绿色荧光蛋白(GFP)融合蛋白的重组RV。 嵌合的N-GFP融合蛋白被有效表达并并入RV RNP和病毒粒子中。 此外,重组RNP在小鼠中诱导针对GFP的强烈的体液免疫应答。 相比之下,用GFP单独接种的小鼠或野生型RV RNP和GFP的组合的小鼠不使用相同的免疫程序触发任何GFP特异性体液应答。 这些结果表明基于RV的载体作为针对其他感染性疾病的灭活疫苗的有用性。