Abstract:
:Interleukin-1 (IL-1) receptor signaling is necessary for control of Mycobacterium tuberculosis (Mtb) infection, yet the role of its two ligands, IL-1α and IL-1β, and their regulation in vivo are poorly understood. Here, we showed that both IL-1α and IL-1β are critically required for host resistance and identified two multifunctional inflammatory monocyte-macrophage and DC populations that coexpressed both IL-1 species at the single-cell level in lungs of Mtb-infected mice. Moreover, we demonstrated that interferons (IFNs) played important roles in regulating IL-1 production by these cells in vivo. Type I interferons inhibited IL-1 production by both subsets whereas CD4(+) T cell-derived IFN-γ selectively suppressed monocyte-macrophages. These data provide a cellular basis for both the anti-inflammatory effects of IFNs and probacterial functions of type I IFNs during Mtb infection and reveal differential regulation of IL-1 production by distinct cell populations as an additional layer of complexity in the activity of IL-1 in vivo.
journal_name
Immunityjournal_title
Immunityauthors
Mayer-Barber KD,Andrade BB,Barber DL,Hieny S,Feng CG,Caspar P,Oland S,Gordon S,Sher Adoi
10.1016/j.immuni.2011.12.002subject
Has Abstractpub_date
2011-12-23 00:00:00pages
1023-34issue
6eissn
1074-7613issn
1097-4180pii
S1074-7613(11)00511-5journal_volume
35pub_type
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