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Gemcitabine reduces MDSCs, tregs and TGFβ-1 while restoring the teff/treg ratio in patients with pancreatic cancer

Eriksson, Emma et al.

Journal of translational medicine. Volume 14:Issue 1 (2016); pp 1-12 -- BioMed Central

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  • Title:
    Gemcitabine reduces MDSCs, tregs and TGFβ-1 while restoring the teff/treg ratio in patients with pancreatic cancer
  • Author: Eriksson, Emma;
    Wenthe, Jessica;
    Irenaeus, Sandra;
    Loskog, Angelica;
    Ullenhag, Gustav
  • Found In: Journal of translational medicine. Volume 14:Issue 1 (2016); pp 1-12
  • Journal Title: Journal of translational medicine
  • Subjects: Human experimentation in medicine--Periodicals; Medicine, Experimental--Periodicals; Therapeutics--Periodicals; Gemcitabine--Pancreatic cancer--Tregs--MDSCs--TGFβ; Dewey: 615.50724
  • Rights: legaldeposit
  • Publication Details: BioMed Central
  • Abstract: AbstractBackgroundCancer immunotherapy can be potentiated by conditioning regimens such as cyclophosphamide, which reduces the level of regulatory T cells (tregs). However, myeloid suppressive cells are still remaining. Accordingly to previous reports, gemcitabine improves immune status of cancer patients. In this study, the role of gemcitabine was further explored to map its immunological target cells and molecules in patients with pancreatic cancer.MethodsPatient blood was investigated by flow cytometry and cytokine arrays at different time points during gemcitabine treatment.ResultsThe patients had elevated myeloid-derived suppressor cells (MDSCs), and Tregs at diagnosis. Myeloid cells were in general decreased by gemcitabine. The granulocytic MDSCs were significantly reduced while monocytic MDSCs were not affected. In vitro, monocytes responding to IL-6 by STAT3 phosphorylation were prevented to respond in gemcitabine medium. However, gemcitabine could not prevent STAT3 phosphorylation in IL-6-treated tumor cell lines. TGFβ-1 was significantly reduced after only one treatment and continued to decrease. At the same time, the effector T cell:Treg ratio was increased and the effector T cells had full proliferative capacity during the gemcitabine cycle. However, after a resting period, the level of suppressor cells and TGFβ-1 had been restored showing the importance of continuous conditioning.ConclusionsGemcitabine regulates the immune system in patients with pancreatic cancer including MDSCs, Tregs and molecules such as TGFβ-1 but does not hamper the ability of effector lymphocytes to expand to stimuli. Hence, it may be of high interest to use gemcitabine as a conditioning strategy together with immunotherapy.
  • Identifier: System Number: LDEAvdc_100080874659.0x000001; Journal ISSN: 1479-5876; 10.1186/s12967-016-1037-z
  • Publication Date: 2016
  • Physical Description: Electronic
  • Shelfmark(s): ELD Digital store

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