Differentiation of inflammatory dendritic cells is mediated by NF-κB1-dependent GM-CSF production in CD4 T cells

Ian K. Campbell, Annemarie van Nieuwenhuijze, Elodie Segura, Kristy O'Donnell, Elise Coghill, Mirja Hommel, Steve Gerondakis, José A. Villadangos, Ian Peter Wicks

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Rel/NF-κB transcription factors regulate inflammatory and immune responses. Despite possible subunit redundancy, NF-κB1-deficient (Nfkb1-/-) mice were profoundly protected from sterile CD4 T cell-dependent acute inflammatory arthritis and peritonitis. We evaluated CD4 T cell function in Nfkb1-/- mice and found increased apoptosis and selectively reduced GM-CSF production. Apoptosis was blocked by expression of a Bcl-2 transgene without restoring a disease response. In contrast with wildtype cells, transfer of Nfkb1-/- or GM-CSF-deficient CD4 T cells into RAG-1-deficient (Rag1-/-) mice failed to support arthritis induction. Injection of GM-CSF into Nfkb1-/- mice fully restored the disease response, suggesting that T cells are an important source of GM-CSF during acute inflammation. In Ag-induced peritonitis, NF-κB1-dependent GM-CSF production in CD4 T cells was required for disease and for generation of inflammatory monocyte-derived dendritic cells (MoDC), but not conventional dendritic cells. MoDC were identified in inflamed synovium and draining lymph nodes during arthritis. These MoDC produced high levels of MCP-1, a potent chemoattractant for monocytes. This study revealed two important findings: NF-κB1 serves a critical role in the production of GM-CSF by activated CD4 T cells during inflammatory responses, and GM-CSF derived from these cells drives the generation of MoDC during inflammatory disease.

Original languageEnglish
Pages (from-to)5468-5477
Number of pages10
JournalJournal of Immunology
Issue number9
Publication statusPublished - 1 May 2011
Externally publishedYes

Cite this

Campbell, I. K., van Nieuwenhuijze, A., Segura, E., O'Donnell, K., Coghill, E., Hommel, M., Gerondakis, S., Villadangos, J. A., & Wicks, I. P. (2011). Differentiation of inflammatory dendritic cells is mediated by NF-κB1-dependent GM-CSF production in CD4 T cells. Journal of Immunology, 186(9), 5468-5477. https://doi.org/10.4049/jimmunol.1002923