Journal of Clinical and Cellular Immunology
Open Access
ISSN: 2155-9899
ISSN: 2155-9899
Roxana Rojas
Tanzania
Research Article
Mycobacterium tuberculosis Induces Expansion of Foxp3 Positive CD4 T-cells with a Regulatory Profile in Tuberculin Non-sensitized Healthy Subjects: Implications for Effective Immunization against TB
Author(s): Christina S Hirsch, Roxana Rojas, Mianda Wu and Zahra Toossi
Christina S Hirsch, Roxana Rojas, Mianda Wu and Zahra Toossi
Objective: Infection by MTB or exposure to MTB constituents is associated with intense microbial stimulation of the immune system, through both antigenic and TLR components, and induction of a milieu that is rich in proinflammatory/ anti-inflammatory cytokines. Here, we addressed the basis of induced regulatory T-cell (iT-reg) expansion in response to MTB stimulation, in the absence of prior T cell antigen responsiveness.
Methods: PBMC from HIV-1 un-infected TST negative and TST positive control subjects were stimulated by virulent MTB H37Rv lysate (L), a French press preparation of MTB that includes all bacterial components. Phenotype of MTB H37RvL induced iT-reg was assessed using immunostaining and flow cytometry. Functional capacity of iT-reg was assessed using 3H-Thymidine incorporation and IFNγ production of non-adherent .. View More»
DOI:
10.4172/2155-9899.1000428