ST2 blockade reduces sST2-producing T cells while maintaining protective mST2-expressing T cells during graft-versus-host disease
- PMID: 26446957
- PMCID: PMC4699312
- DOI: 10.1126/scitranslmed.aab0166
ST2 blockade reduces sST2-producing T cells while maintaining protective mST2-expressing T cells during graft-versus-host disease
Abstract
Graft-versus-host disease (GVHD) remains a devastating complication after allogeneic hematopoietic cell transplantation (HCT). We previously identified high plasma soluble suppression of tumorigenicity 2 (sST2) as a biomarker of the development of GVHD and death. sST2 sequesters interleukin-33 (IL-33), limiting its availability to T cells expressing membrane-bound ST2 (mST2) [T helper 2 (TH2) cells and ST2(+)FoxP3(+) regulatory T cells]. We report that blockade of sST2 in the peritransplant period with a neutralizing monoclonal antibody (anti-ST2 mAb) reduced GVHD severity and mortality. We identified intestinal stromal cells and T cells as major sources of sST2 during GVHD. ST2 blockade decreased systemic interferon-γ, IL-17, and IL-23 but increased IL-10 and IL-33 plasma levels. ST2 blockade also reduced sST2 production by IL-17-producing T cells while maintaining protective mST2-expressing T cells, increasing the frequency of intestinal myeloid-derived suppressor cells, and decreasing the frequency of intestinal CD103 dendritic cells. Finally, ST2 blockade preserved graft-versus-leukemia activity in a model of green fluorescent protein (GFP)-positive MLL-AF9 acute myeloid leukemia. Our findings suggest that ST2 is a therapeutic target for severe GVHD and that the ST2/IL-33 pathway could be investigated in other T cell-mediated immune disorders with loss of tolerance.
Copyright © 2015, American Association for the Advancement of Science.
Conflict of interest statement
Dr. Paczesny has a patent on “Methods of detection of graft-versus-host disease” licensed to Viracor-IBT Laboratories. Otherwise, the authors have no other relevant conflicts of interest to declare.
Figures
Comment in
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The emerging role of sST2 blocking in the therapy of graft-versus-host disease.Ann Transl Med. 2016 Oct;4(Suppl 1):S42. doi: 10.21037/atm.2016.10.22. Ann Transl Med. 2016. PMID: 27868010 Free PMC article. No abstract available.
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Prospects to translate the biology of IL-33 and ST2 during organ transplantation into therapeutics to treat graft-versus-host disease.Ann Transl Med. 2016 Dec;4(24):500. doi: 10.21037/atm.2016.11.74. Ann Transl Med. 2016. PMID: 28149862 Free PMC article. No abstract available.
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