Targeting tumour-reprogrammed myeloid cells: the new battleground in cancer immunotherapy

Author:

De Sanctis Francesco,Adamo Annalisa,Canè Stefania,Ugel StefanoORCID

Abstract

AbstractTumour microenvironment is a complex ecosystem in which myeloid cells are the most abundant immune elements. This cell compartment is composed by different cell types, including neutrophils, macrophages, dendritic cells, and monocytes but also unexpected cell populations with immunosuppressive and pro-tumour roles. Indeed, the release of tumour-derived factors influences physiological haematopoiesis producing unconventional cells with immunosuppressive and tolerogenic functions such as myeloid-derived suppressor cells. These pro-tumour myeloid cell populations not only support immune escape directly but also assist tumour invasion trough non-immunological activities. It is therefore not surprising that these cell subsets considerably impact in tumour progression and cancer therapy resistance, including immunotherapy, and are being investigated as potential targets for developing a new era of cancer therapy. In this review, we discuss emerging strategies able to modulate the functional activity of these tumour-supporting myeloid cells subverting their accumulation, recruitment, survival, and functions. These innovative approaches will help develop innovative, or improve existing, cancer treatments.

Funder

Ministero dell’Istruzione, dell’Università e della Ricerca

Associazione Italiana per la Ricerca sul Cancro

Fondazione Cassa di Risparmio di Verona Vicenza Belluno e Ancona

Università degli Studi di Verona

Publisher

Springer Science and Business Media LLC

Subject

Immunology,Immunology and Allergy

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