alexa GM-CSF induces bone marrow precursors of NOD mice to skew into tolerogenic dendritic cells that protect against diabetes.
Immunology

Immunology

Immunome Research

Author(s): Gaudreau S, Guindi C, Mnard M, Benabdallah A, Dupuis G

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We have reported that GM-CSF treatment of NOD mice suppressed diabetes by increasing the number of tolerogenic dendritic cells (tDCs) and Tregs in the periphery. Here, we have investigated whether GM-CSF acted on NOD bone marrow DCs precursors to skew their differentiation to tDCs. DCs were generated from the bone marrow of GM-CSF-treated (GM.BMDCs) and PBS-treated (PBS.BMDCs) NOD mice and were assessed for their ability to acquire tolerogenic properties. Upon LPS stimulation, GM.BMDCs became fully mature, expressed high levels of PD-L1 and produced more IL-10 and less IL-12p70 and IFN-gamma than PBS.BMDCs. In addition, LPS-stimulated GM.BMDCs possessed a reduced capacity to activate diabetogenic CD8(+) T cells in a PD-1/PD-L1-dependent manner. A single injection of LPS-stimulated GM.BMDCs in NOD mice resulted in long-term protection from diabetes, in contrast to LPS-stimulated PBS.BMDCs. Our results showed that GM-CSF-treatment acted on bone marrow precursors to skew their differentiation into tDCs that protected NOD mice against diabetes.

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This article was published in Cell Immunol. and referenced in Immunome Research

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