Ahmad G, Torben W, Zhang W, Wyatt M, Siddiqui A A
Department of Microbiology and Immunology, Texas Tech University Health Sciences Center, Lubbock, 79430, USA.
Parasite Immunol. 2009 Mar;31(3):156-61. doi: 10.1111/j.1365-3024.2008.01091.x.
No effective vaccine exists for the human parasitic disease, schistosomiasis. We have targeted a functionally important antigen, Sm-p80 as a vaccine candidate because of its consistent immunogenicity, protective potential and important role in the immune evasion process. In this study we report that a Sm-p80-based DNA vaccine formulation confers 59% reduction in worm burden in mice. Animals immunized with Sm-p80-pcDNA3 exhibited a decrease in egg production by 84%. Sm-p80 DNA elicited strong immune responses that include IgG2A and IgG2B antibody isotypes in vaccinated animals. Splenocytes proliferated in response to Sm-p80 produced appreciably more Th1 response enhancing cytokines (IL-2, IFN-gamma) than Th2 response enhancing cytokines (IL-4, IL-10). These data reinforce the potential of Sm-p80 as an excellent vaccine candidate for schistosomiasis.
目前尚无针对人类寄生虫病血吸虫病的有效疫苗。我们已将一种功能重要的抗原Sm-p80作为疫苗候选物,因为它具有一致的免疫原性、保护潜力以及在免疫逃避过程中的重要作用。在本研究中,我们报告基于Sm-p80的DNA疫苗制剂可使小鼠体内的虫负荷降低59%。用Sm-p80-pcDNA3免疫的动物产卵量减少了84%。Sm-p80 DNA在接种动物中引发了强烈的免疫反应,包括IgG2A和IgG2B抗体亚型。脾细胞对Sm-p80产生增殖反应,产生的增强Th1反应的细胞因子(IL-2、IFN-γ)明显多于增强Th2反应的细胞因子(IL-4、IL-10)。这些数据强化了Sm-p80作为血吸虫病优秀疫苗候选物的潜力。