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Updated: May 28, 2026
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Bone Marrow Transplantation Platform to Investigate the Role of Dendritic Cells in Graft-versus-Host Disease
Published on: March 17, 2020
Mast cells condition dendritic cells to mediate allograft tolerance
Victor C de Vries1, Karina Pino-Lagos, Elizabeth C Nowak
1Department of Microbiology and Immunology, Dartmouth Medical School and Norris Cotton Cancer Center, Lebanon, NH 03756, USA.
Immunity
|November 1, 2011
Summary
Mast cells (MCs) condition dendritic cells (DCs) to promote peripheral tolerance. MCs increase the accumulation and survival of tolerogenic DCs in lymph nodes, mediated by TNFα and GM-CSF, crucial for graft tolerance.
Area of Science:
- Immunology
- Cell Biology
Background:
- Peripheral tolerance is essential for preventing autoimmune diseases and transplant rejection.
- Regulatory T cells, dendritic cells (DCs), and mast cells (MCs) are key players in maintaining peripheral tolerance.
- The precise mechanisms by which MCs influence DC function in tolerance remain incompletely understood.
Purpose of the Study:
- To define the role of mast cells in controlling dendritic cell behavior for the facilitation of peripheral tolerance.
- To investigate the impact of mast cells on the migration and function of graft-derived DCs in a skin allograft tolerance model.
Main Methods:
- Utilized a skin allograft tolerance model.
- Investigated the accumulation of graft-derived DCs in draining lymph nodes (dLNs) under tolerant and non-tolerant conditions.
- Assessed the role of tumor necrosis factor-alpha (TNFα) and granulocyte macrophage colony-stimulating factor (GM-CSF) in MC-mediated DC conditioning.
Main Results:
- Mast cells significantly increased the accumulation of graft-derived DCs in dLNs under tolerant conditions, dependent on TNFα.
- MCs produced GM-CSF, which conferred a survival advantage to graft-derived DCs.
- DCs migrating to dLNs from tolerant allografts exhibited tolerogenic properties, suppressing T cell responses.
Conclusions:
- Mast cells play a critical role in conditioning dendritic cells to promote peripheral tolerance.
- Peripherally produced TNFα and GM-CSF by mast cells functionally impact the migration and tolerogenic function of DCs.
- This study highlights a novel mechanism of immune regulation involving mast cell-dendritic cell crosstalk in maintaining allograft tolerance.
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