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IgE Activates Monocytes from Cancer Patients to Acquire a Pro-Inflammatory Phenotype

  • St. John's Institute of Dermatology
  • School of Basic & Medical Biosciences
  • Informatics Department
  • Department of Informatics, Faculty of Natural and Mathematical Sciences, King's College London, London, United Kingdom.
  • School of Cancer & Pharmaceutical Sciences, King's College London, 9th Floor, Tower Wing, Guy's Hospital, London SE1 9RT, UK.
  • School of Cancer & Pharmaceutical Sciences
  • King's College London
  • Fondazione IRCCS Istituto Nazionale dei Tumori (INT)
  • Breast Cancer Now

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)
259 Downloads (Pure)

Abstract

IgE contributes to host-protective functions in parasitic and bacterial infections, often by monocyte and macrophage recruitment. We previously reported that monocytes contribute to tumour antigen-specific IgE-mediated tumour growth restriction in rodent models. Here, we investigate the impact of IgE stimulation on monocyte response, cellular signalling, secretory and tumour killing functions. IgE cross-linking on human monocytes with polyclonal antibodies to mimic formation of immune complexes induced upregulation of co-stimulatory (CD40, CD80, CD86), and reduced expression of regulatory (CD163, CD206, MerTK) monocyte markers. Cross-linking and tumour antigen-specific IgE antibody-dependent cellular cytotoxicity (ADCC) of cancer cells by cancer patient-derived monocytes triggered release of pro-inflammatory mediators (TNFα, MCP-1, IL-10, CXCL-10, IL-1β, IL-6, IL-23). High intratumoural gene expression of these mediators was associated with favourable five-year overall survival in ovarian cancer. IgE cross-linking of trimeric FcεRI on monocytes stimulated the phosphorylation of intracellular protein kinases widely reported to be downstream of mast cell and basophil tetrameric FcεRI signalling. These included recently-identified FcεRI pathway kinases Fgr, STAT5, Yes and Lck, which we now associate with monocytes. Overall, anti-tumour IgE can potentiate pro-inflammatory signals, and prime tumour cell killing by human monocytes. These findings will inform the development of IgE monoclonal antibody therapies for cancer.

Original languageEnglish
Article number3376
Pages (from-to)1-19
Number of pages19
JournalCancers
Volume12
Issue number11
DOIs
Publication statusPublished - 15 Nov 2020

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Keywords

  • AllergoOncology
  • Cancer
  • Cancer immunotherapy
  • Cross-linking
  • Cytotoxicity
  • FcεRI
  • IgE
  • Monocytes

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