目的对前期研究中所筛选出的能够与戊型肝炎病毒（hepatitis E virus，HEV）重组衣壳蛋白颗粒P239存在特异性的相互作用的蛋白进行分析验证。方法使用pull-down、MALDI-TOF-MS、免疫共沉淀技术及免疫荧光技术对与P239有潜在相互作用的蛋白进行鉴定和进一步分析。结果MALDI-TOF-MS及免疫共沉淀技术，均表明该蛋白为热休克蛋白90（HSP90）并与P239相互作用。随后，对P239进入细胞的过程中胞内HSP90蛋白量及其分布的变化做了初步研究。发现虽然HSP90在蛋白总量上并没有发生明显的变化，但其定位却伴随着P239在胞内的迁移发生了由细胞膜向细胞核核周的转移。结论HSP90可能参与了P239入胞后的转运并介导了HEV入胞后向效应细胞器的转运，为研究HEV的感染机制及对HEV的预防和控制提供了有益的线索。
By using Western blot and immunofluorescence assays,the recombinant HEV capsid protein p239 was found specifically attached to the HepG2 cell surface and entered to the cytoplasm with the increase of incubation temperature.Pre-mixture of wild-type HEV with p239 blocked the infectivity of the virus on primary cultured human hepatocytes and HepG2 cells,indicating that p239 and HEV competed the same targeting site on these cells.These data provide evidence that p239 has a similar cell surface structure with wild-type HEV.
