Monocytes and Macrophages in Cancer: Unsuspected Roles

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Abstract

The behavior of cancer is undoubtedly affected by stroma. Macrophages belong to this microenvironment and their presence correlates with reduced survival in most cancers. After a tumor-induced "immunoediting", these monocytes/macrophages, originally the first line of defense against tumor cells, undergo a phenotypic switch and become tumor-supportive and immunosuppressive.The influence of these tumor-associated macrophages (TAMs) on cancer is present in all traits of carcinogenesis. These cells participate in tumor initiation and growth, migration, vascularization, invasion and metastasis. Although metastasis is extremely clinically relevant, this step is always reliant on the angiogenic ability of tumors. Therefore, the formation of new blood vessels in tumors assumes particular importance as a limiting step for disease progression.Herein, the once unsuspected roles of macrophages in cancer will be discussed and their importance as a promising strategy to treat this group of diseases will be reminded.

Original languageEnglish
Pages (from-to)161-185
Number of pages25
JournalAdvances in Experimental Medicine and Biology
Volume1219
DOIs
Publication statusPublished - 2020

Keywords

  • Immunoediting
  • Metastasis
  • Tumor stroma
  • Tumor vascularization
  • Tumor-associated macrophages (TAM)

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