Unknown

Dataset Information

0

Parasite stage-specific recognition of endogenous Toxoplasma gondii-derived CD8+ T cell epitopes.


ABSTRACT: BALB/c mice control infection with the obligate intracellular parasite Toxoplasma gondii and develop a latent chronic infection in the brain, as do immunocompetent humans. Interferon-gamma-producing CD8+ T cells provide essential protection against T. gondii infection, but the epitopes recognized have so far remained elusive.We employed caged major histocompatibility complex molecules to generate approximately 250 H-2L(d) tetramers and to distinguish T. gondii-specific CD8+ T cells in BALB/c mice.We identified 2 T. gondii-specific H-2L(d)-restricted T cell epitopes, one from dense granule protein GRA4 and the other from rhoptry protein ROP7. H-2L(d)/GRA4 reactive T cells from multiple organ sources predominated 2 weeks after infection, while the reactivity of the H-2L(d)/ROP7 T cells peaked 6-8 weeks after infection. BALB/c animals infected with T. gondii mutants defective in establishing a chronic infection showed altered levels of antigen-specific T cells, depending on the T. gondii mutant used.Our results shed light on the identity and the parasite stage-specificity of 2 CD8+ T cell epitopes recognized in the acute and chronic phase of infection with T. gondii.

SUBMITTER: Frickel EM 

PROVIDER: S-EPMC4771975 | biostudies-literature | 2008 Dec

REPOSITORIES: biostudies-literature

altmetric image

Publications

Parasite stage-specific recognition of endogenous Toxoplasma gondii-derived CD8+ T cell epitopes.

Frickel Eva-Maria EM   Sahoo Nivedita N   Hopp Johnathan J   Gubbels Marc-Jan MJ   Craver Mary Patricia J MP   Knoll Laura J LJ   Ploegh Hidde L HL   Grotenbreg Gijsbert M GM  

The Journal of infectious diseases 20081201 11


<h4>Background</h4>BALB/c mice control infection with the obligate intracellular parasite Toxoplasma gondii and develop a latent chronic infection in the brain, as do immunocompetent humans. Interferon-gamma-producing CD8+ T cells provide essential protection against T. gondii infection, but the epitopes recognized have so far remained elusive.<h4>Methods</h4>We employed caged major histocompatibility complex molecules to generate approximately 250 H-2L(d) tetramers and to distinguish T. gondii-  ...[more]

Similar Datasets

| S-EPMC3351351 | biostudies-literature
| S-EPMC5874296 | biostudies-literature
| S-EPMC2957522 | biostudies-literature
| S-EPMC1903550 | biostudies-literature
| S-EPMC7734631 | biostudies-literature
| S-EPMC1140536 | biostudies-literature
| S-EPMC9490983 | biostudies-literature
2005-08-13 | GSE3119 | GEO
2005-08-13 | E-GEOD-3119 | biostudies-arrayexpress
| S-EPMC549326 | biostudies-literature