Evaluation of Protective Immune Responses Induced by Recombinant TrxLp and ENO2 Proteins against Toxoplasma gondii Infection in BALB/c Mice

文献类型： 外文期刊

第一作者： Wang, Meng

作者： Wang, Meng;Yang, Xiao-Yu;Zhang, Nian-Zhang;Zhang, De-Lin;Zhu, Xing-Quan

作者机构：

期刊名称：BIOMED RESEARCH INTERNATIONAL （ 影响因子：3.411； 五年影响因子：3.62 ）

ISSN： 2314-6133

年卷期： 2016 年

页码：

收录情况： SCI

摘要： Toxoplasma gondii is an obligate intracellular parasitic protozoan that can infect almost all species of warm-blooded animals. As any chemical-based drugs could not act against the tissue cyst stage of T. gondii, vaccination may be one of the ideal control strategies. In the present study, two new vaccine candidates, named TgENO2 and TgTrxLp, were purified from Escherichia coli with pET-30a(+) expression system and then were injected into BALB/c mice to evaluate the protective efficacy against acute and chronic toxoplasmosis. The results showed that both the recombinant proteins, either alone or in combination, could elicit strong humoral and cellular immune responses with a higher level of IgG antibodies, IFN-gamma, IL-2, CD4(+), and CD8(+) T cells as compared to those in mice from control groups. After acute challenge with tachyzoites of the GJS strain, mice immunized with rTgTrxLp (8 +/- 2.77 d), rTgENO2 (7.4 +/- 1.81 d), and rTgTrxLp + rTgENO2 (8.38 +/- 4.57 d) proteins showed significantly longer survival time than those that received Freund's adjuvant (6.78 +/- 2.08 d) and PBS (6.38 +/- 4.65 d) (chi(2) = 9.687, df = 4, P = 0.046). The protective immunity of rTgTrxLp, rTgENO2, and rTgTrxLp + rTgENO2 proteins against chronic T. gondii infection showed 69.77%, 58.14%, and 20.93% brain cyst reduction as compared to mice that received PBS. The present study suggested that both TgENO2 and TgTrxLp were potential candidates for the development of multicomponent vaccines against toxoplasmosis.

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