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Resistance to Chronic Toxoplasma gondii Infection Induced by a DNA Vaccine Expressing GRA16.
- Source :
-
BioMed Research International . 8/10/2017, Vol. 2017, p1-6. 6p. - Publication Year :
- 2017
-
Abstract
- Toxoplasma gondii can infect all warm-blooded animals including human beings. T. gondii dense granule protein 16 (TgGRA16) as a crucial virulence factor could modulate the host gene expression. Here, a DNA vaccine expressing TgGRA16 was constructed to explore the protective efficacy against T. gondii infection in Kunming mice. The immune responses induced by pVAX-GRA16 were also evaluated. Mice immunized with pVAX-GRA16 could elicit higher levels of specific IgG antibody and strong cellular response compared to those in controls. The DNA vaccination significantly increased the levels of cytokines (IFN-γ, IL-2, IL-4, and IL-10) and the percentages of CD4+ and CD8+ T cells in mice. After lethal challenge, mice immunized with pVAX-GRA16 (8.4±0.78 days) did not show a significant longer survival time than that in controls (7.1±0.30 days) (p>0.05). However, in chronic toxoplasmosis model (administration of 10 brain cysts of PRU strain orally), numbers of tissue cysts in mice immunized with pVAX-GRA16 were significantly reduced compared to those in controls (p<0.05) and the rate of reduction could reach 43.89%. The results indicated that the TgGRA16 would be a promising vaccine candidate for further development of effective epitope-based vaccines against chronic T. gondii infection in mice. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 23146133
- Volume :
- 2017
- Database :
- Academic Search Index
- Journal :
- BioMed Research International
- Publication Type :
- Academic Journal
- Accession number :
- 124563427
- Full Text :
- https://doi.org/10.1155/2017/1295038