Modulation Effects of Toxoplasma gondii Histone H2A1 on Murine Macrophages and Encapsulation with Polymer as a Vaccine Candidate

文献类型： 外文期刊

第一作者： Yu, Zhengqing

作者： Yu, Zhengqing;Zhou, Tianyuan;Luo, Yanxin;Dong, Lu;Li, Chunjing;Yan, Ruofeng;Xu, Lixin;Song, Xiaokai;Li, Xiangrui;Liu, Junlong;Luo, Jianxun

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关键词： Toxoplasma gondii; murine macrophage; nanoparticles; PLGA; chitosan; immune response

期刊名称：VACCINES （ 影响因子：4.422； 五年影响因子：5.513 ）

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年卷期： 2020 年 8 卷 4 期

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收录情况： SCI

摘要： Toxoplasma gondii (T. gondii) is the most common zoonotic protozoa and has infected about one-third of the population worldwide. Recombinant epitopes encapsulated in nanospheres have advantages over traditional T. gondii vaccines. For an efficient delivery system, poly (DL-lactide-co-glycolide) (PLGA) and chitosan are the most frequently used biodegradable polymeric nanospheres with strong safety profiles. In the present study, we first expressed and purified histone H2A1 of T. gondii using the prokaryotic expression system. The effects of recombinant TgH2A1 on the functions of murine macrophages were then studied. Purified recombinant TgH2A1 was then encapsulated in nanospheres with PLGA and chitosan. After subcutaneous vaccination in mice, the immune response was evaluated by double antibody sandwich ELISA kits. The results from this study showed that PLGA and chitosan loaded with rTgH2A1 could trigger a stronger Th1 oriented immune response and prolong the survival time of mice effectively. In conclusion, PLGA and chitosan nanospheres loaded with histone H2A1 are an effective method for the development of vaccines against T. gondii. Further studies should focus on evaluating the regulatory mechanism of TgH2A1, vaccine potency, and cellular response in chronic T. gondii infections.

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