Intestinal Monocyte-Derived Macrophages Control Commensal-Specific Th17 Responses

Casandra Panea, Adam M. Farkas, Yoshiyuki Goto, Shahla Abdollahi-Roodsaz, Carolyn Lee, Balázs Koscsó, Kavitha Gowda, Tobias M. Hohl, Milena Bogunovic, Ivaylo I. Ivanov

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61 Scopus citations

Abstract

Generation of different CD4 T cell responses to commensal and pathogenic bacteria is crucial for maintaining a healthy gut environment, but the associated cellular mechanisms are poorly understood. Dendritic cells (DCs) and macrophages (Mfs) integrate microbial signals and direct adaptive immunity. Although the role of DCs in initiating T cell responses is well appreciated, how Mfs contribute to the generation of CD4 T cell responses to intestinal microbes is unclear. Th17 cells are critical for mucosal immune protection and at steady state are induced by commensal bacteria, such as segmented filamentous bacteria (SFB). Here, we examined the roles of mucosal DCs and Mfs in Th17 induction by SFB in vivo. We show that Mfs, and not conventional CD103+ DCs, are essential for the generation of SFB-specific Th17 responses. Thus, Mfs drive mucosal T cell responses to certain commensal bacteria.

Original languageEnglish (US)
Article number1940
Pages (from-to)1314-1324
Number of pages11
JournalCell Reports
Volume12
Issue number8
DOIs
StatePublished - Aug 25 2015

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)

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    Panea, C., Farkas, A. M., Goto, Y., Abdollahi-Roodsaz, S., Lee, C., Koscsó, B., Gowda, K., Hohl, T. M., Bogunovic, M., & Ivanov, I. I. (2015). Intestinal Monocyte-Derived Macrophages Control Commensal-Specific Th17 Responses. Cell Reports, 12(8), 1314-1324. [1940]. https://doi.org/10.1016/j.celrep.2015.07.040