Immunosuppression associated with chronic inflammation in the tumor microenvironment

Carcinogenesis. 2015 Oct;36(10):1085-93. doi: 10.1093/carcin/bgv123. Epub 2015 Sep 8.


Chronic inflammation contributes to cancer development via multiple mechanisms. One potential mechanism is that chronic inflammation can generate an immunosuppressive microenvironment that allows advantages for tumor formation and progression. The immunosuppressive environment in certain chronic inflammatory diseases and solid cancers is characterized by accumulation of proinflammatory mediators, infiltration of immune suppressor cells and activation of immune checkpoint pathways in effector T cells. In this review, we highlight recent advances in our understanding of how immunosuppression contributes to cancer and how proinflammatory mediators induce the immunosuppressive microenvironment via induction of immunosuppressive cells and activation of immune checkpoint pathways.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Chronic Disease
  • Humans
  • Immune Tolerance
  • Immunosuppression Therapy
  • Inflammation / immunology*
  • Inflammation / pathology
  • Melanoma / immunology*
  • Melanoma / pathology
  • T-Lymphocytes / immunology*
  • T-Lymphocytes / pathology
  • Tumor Microenvironment / immunology*