Genotoxic stress signalling as a driver of macrophage diversity

Authors:

Ana Kasapi1,2 and Antigoni Triantafyllopoulou1,2

Affiliations:

1 Department of Rheumatology and Clinical Immunology and Institute of Microbiology, Charité University Medical Center, D-10117 Berlin, Germany.

2 German Rheumatism Research Center, a Leibniz Institute, D-10117 Berlin, Germany.

Keywords: 

DNA damage, ATR, ATM, innate immunity, macrophage programs, chronic inflammation.

Abbreviatons:

AGS – Aicardi-Goutieres Syndrome;

ATM – Ataxia telangiectasia mutated;

ATR – Ataxia telangiectasia and Rad3-related;

BMDM – bone marrow-derived macrophage;

cGAS – cyclic GMP-AMP synthase;

DDR – DNA Damage Response;

DNA-PK – DNA-dependent protein kinase;

DNA-PKcs – DNA-PK catalyitc subunit;

dNTP – deoxynucleoside triphosphate;

ds – double strand;

HR – homologous recombination;

IFN – interferon;

IL – interleukin;

IRF – IFN regulatory factor;

LPS – lipopolysaccharide;

MCMV – murine cytomegalovirus;

MCSF – macrophage colony stimulating factor;

MRN – Mre11-Rad50-NBS1;

NHEJ – non-homologous end joining;

NK – natural killer;

NO – nitric oxide;

RAG – recombination-activated gene;

ROS – reactive oxygen species;

ss – single strand;

SCID – severe combined immunodeficiency;

STING – stimulator of interferon genes;

TLR – toll-like receptor.

Corresponding Author(s):

Prof. Antigoni Triantafyllopoulou, Department of Rheumatology and Clinical Immunology, Charite – Campus Mitte, Intern: DRFZ, Virchowweg 12; Chariteplatz 1, 10117 Berlin; antigoni.triantafyllopoulou@charite.de

Conflict of interest statement:

The authors certify that they have no affiliations with or involvement in any organization or entity with any financial or non-financial interest in the subject matter or materials discussed in this manuscript.

Please cite this article as:

Ana Kasapi and Antigoni Triantafyllopoulou (2022). Genotoxic stress signalling as a driver of macrophage diversity. Cell Stress 6(3): 30-44. doi: 10.15698/cst2022.03.265

© 2022 Kasapi and Triantafyllopoulou. This is an open-access article released under the terms of the Creative Commons Attribution (CC BY) license, which allows the unrestricted use, distribution, and re-production in any medium, provided the original author and source are acknowledged.

Abstract:

Tissue macrophages arise from yolk sac, fetal liver and hematopoietic progenitors and adopt diverse transcriptional programs and phenotypes, instructed by their microenvironment. In chronic inflammation, such as in chronic infections, autoimmunity, or cancer, tissue microenvironments change dramatically thus imprinting new programs on tissue macrophages. While stress is a known driver of carcinogenesis in epithelial cells, emerging evidence suggests that macrophage responses to genotoxic stress are embedded in their ‘physiologic’ immune and tissue healing programs and in most cases do not lead to myeloid malignancies. The role of genotoxic stress as an instructor of macrophage-mediated immune defense and tissue remodeling is only beginning to be understood. Here, we review the evidence showing that genotoxic stress, which macrophages and their precursors face upon encountering inflammatory and/or growth signals, instructs their transcriptional programs, by activating non-canonical, cell-type specific DNA Damage Response (DDR)-driven signaling pathways. We propose that immune-cell specific, DDR-instructed programs are crucial for tissue homeostasis as well as for the maintenance and resolution of inflammatory responses in infection, cancer, autoinflammatory and autoimmune microenvironments.