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Infection of C57BL/6J mice with the parasite Toxoplasma gondii triggers a powerful Th1 immune response that is detrimental to the host. During acute infection, a reduction in CD4+Foxp3+ regulatory T cells (Treg) has been reported. We studied the role of Treg during T. gondii infection by adoptive transfer of cells purified from transgenic Foxp3EGFP mice to infected wild type animals. We found a less...
The human pathogen Mycobacterium tuberculosis binds to a variety of host cell proteins, including those of the fibrinolytic system. These observations prompted us to study the expression of components of this system in an animal model of progressive pulmonary tuberculosis. Lung homogenates from BALB/c mice infected with M. tuberculosis H37Rv were analyzed to determine the expression and enzymatic...
A third of the world population is latently infected with Mycobacterium tuberculosis and many cases of active tuberculosis arise from latent bacilli reactivation. Thus, it is important to design new vaccines to prevent reactivation. Using an experimental model of chronic tuberculosis in B6D2F1 mice, we observed constant expression of Rv1759c antigen, a member of the PE_PGRS gene family, on the cell...
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