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Li, Jixu; Galon, Eloiza May; Guo, Huanping; Liu, Mingming; Li, Yongchang; Ji, Shengwei; Zafar, Iqra; Gao, Yang; Zheng, Weiqing; Adjou Moumouni, Paul Franck; Rizk, Mohamed Abdo; Tumwebaze, Maria Agnes; Benedicto, Byamukama; Ringo, Aaron Edmond; Masatani, Tatsunori; Xuan, Xuenan
Frontiers in microbiology, 03/2021, Letnik: 12Journal Article
Toxoplasmosis is a zoonotic parasitic disease caused by the obligate intracellular protozoa , which threatens a range of warm-blooded mammals including humans. To date, it remains a challenge to find safe and effective drug treatment or vaccine against toxoplasmosis. In this study, our results found that the development of a mutant strain based on gene disruption of dense granule protein 9 (gra9) in type II PLK strain decreased parasite replication , severely attenuated virulence in mice, and significantly reduced the formation of cysts in animals. Hence, we developed an immunization scheme to evaluate the protective immunity of the attenuated strain of Δ in type II PLK parasite as a live attenuated vaccine against toxoplasmosis in the mouse model. Δ vaccination-induced full immune responses characterized by significantly high levels of pro-inflammatory cytokine interferon gamma (IFN-γ) and interleukin-12 (IL-12), maintained the high -specific immunoglobulin G (IgG) level, and mixed high IgG1/IgG2a levels. Their levels provided the complete protective immunity which is a combination of cellular and humoral immunity in mouse models against further infections of lethal doses of type I RH, type II PLK wild-type tachyzoites, or type II PLK cysts. Results showed that Δ vaccination proved its immunogenicity and potency conferring 100% protection against acute and chronic challenges. Together, Δ vaccination provided safe and efficient immune protection against challenging parasites, suggesting that :Δ is a potentially promising live attenuated vaccine candidate.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Vir: Osebne bibliografije
in: SICRIS
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