Cutting edge: Control of Mycobacterium tuberculosis infection by a subset of lung parenchyma-homing CD4 T cells

Shunsuke Sakai, Keith D. Kauffman, Jason M. Schenkel, Cortez C. McBerry, Katrin D. Mayer-Barber, David Masopust, Daniel L. Barber

Research output: Contribution to journalArticlepeer-review

153 Scopus citations

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 CXCR3hi and localize to lung parenchyma or are CX3CR1hiKLRG1hi 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. The Journal of Immunology, 2014, 192: 2965-2969.

Original languageEnglish (US)
Pages (from-to)2965-2969
Number of pages5
JournalJournal of Immunology
Volume192
Issue number7
DOIs
StatePublished - Apr 1 2014

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