甲乙型肝炎联合疫苗小鼠的免疫原性

目的观察甲乙型肝炎联合疫苗的免疫原性.方法制备甲乙型肝炎联合疫苗,不同配比的甲乙型肝炎联合疫苗于第0、4、24周3次接种小鼠,连续测定甲型和乙型肝炎抗体水平;1次免疫后测定小鼠脾脏单个核细胞增殖情况及CD4 和CD8 细胞数量变化情况.结果3次免疫后,各组甲、乙型肝炎抗体阳转率均达到100%,且联合疫苗组早于单价对照组阳转;所诱导的甲、乙型肝炎抗体水平在数值上超过了单价对照,但无显著差异.1次接种后,联合疫苗能有效诱导机体的细胞免疫应答,小鼠脾脏单个核细胞增殖,CD4 和CD8 细胞数量增加.结论所制备的联合疫苗具有良好的免疫原性.

Immunogenecity of combined hepatitis A and B vaccine

Objective To observe the immunogenicity of combined hepatitis A and B vaccine(HAB). Methods The combined HAB vaccine was prepared and different concentrations of HAB were administered on mice in week 0, 4 and 24, and then we tested the antibodies to both hepatitis A virus and B virus. After the first injection, we tested the hepatitis A antigen-induced and hepatitis B surface antigen-induced stimulation indices in spleen monocyte as well as changes of CD4 and CD8 cell numbers. Results The serum antibody positive rates were 100% in all three groups, and the antibody induced by HAB vaccine were earlier than by monovalent vaccine. The hepatitis A antibody and hepatitis B surface antibody titers after the combined vaccine inoculation were not significantly higher than those after the monovalent vaccine inoculation. On the other hand, after the first injection of the combined vaccine, the hepatitis A antigen-induced and hepatitis B surface antigen-induced stimulation indices in spleen monocyte were detected. The numbers of CD4 and CD8 cells increased. Conclusions HAB vaccine has reliable immunogenicity.