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Control of Mycobacterium tuberculosis infection by a subset of lung parenchyma homing CD4 T cells
- Publication Year :
- 2014
-
Abstract
- Th1 cells are critical for containment of Mycobacterium tuberculosis infection, but little else is known about the properties of protective CD4 T cell responses. In this study, we show that the pulmonary Th1 response against M. tuberculosis is composed of two populations that are either CXCR3(hi) and localize to lung parenchyma or are CX3CR1(hi)KLRG1(hi) and are retained within lung blood vasculature. M. tuberculosis-specific parenchymal CD4 T cells migrate rapidly back into the lung parenchyma upon adoptive transfer, whereas the intravascular effectors produce the highest levels of IFN-γ in vivo. Importantly, parenchymal T cells displayed greater control of infection compared with the intravascular counterparts upon transfer into susceptible T cell-deficient hosts. Thus, we identified a subset of naturally generated M. tuberculosis-specific CD4 T cells with enhanced protective capacity and showed that control of M. tuberculosis correlates with the ability of CD4 T cells to efficiently enter the lung parenchyma rather than produce high levels of IFN-γ.
- Subjects :
- CD4-Positive T-Lymphocytes
Mice, Knockout
Receptors, CXCR3
CX3C Chemokine Receptor 1
Mycobacterium tuberculosis
Th1 Cells
Flow Cytometry
Adoptive Transfer
Article
Mice, Inbred C57BL
Interferon-gamma
Mice
Mice, Congenic
Microscopy, Fluorescence
Cell Movement
Host-Pathogen Interactions
Animals
Blood Vessels
Leukocyte Common Antigens
Tuberculosis
Lectins, C-Type
Receptors, Chemokine
Receptors, Immunologic
Lung
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.pmid..........899f346479e7152d1604a59a41fef0a1