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Updated: Mar 16, 2026

Visualizing and Quantifying Endonuclease-Based Site-Specific DNA Damage
Published on: August 21, 2021
DNA Damage Response and Immune Defense: Links and Mechanisms
Rania Nakad1, Björn Schumacher1
1Institute for Genome Stability in Ageing and Disease, Medical Faculty, University of CologneCologne, Germany; Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases, Center for Molecular Medicine Cologne and Systems Biology of Ageing Cologne, University of CologneCologne, Germany.
Abstract:
DNA damage plays a causal role in numerous human pathologies including cancer, premature aging, and chronic inflammatory conditions. In response to genotoxic insults, the DNA damage response (DDR) orchestrates DNA damage checkpoint activation and facilitates the removal of DNA lesions. The DDR can also arouse the immune system by for example inducing the expression of antimicrobial peptides as well as ligands for receptors found on immune cells. The activation of immune signaling is triggered by different components of the DDR including DNA damage sensors, transducer kinases, and effectors. In this review, we describe recent advances on the understanding of the role of DDR in activating immune signaling. We highlight evidence gained into (i) which molecular and cellular pathways of DDR activate immune signaling, (ii) how DNA damage drives chronic inflammation, and (iii) how chronic inflammation causes DNA damage and pathology in humans.
Insights
DNA damage response (DDR) activates immune signaling, contributing to inflammation and diseases like cancer. Understanding DDR
Area of Science:
- Molecular Biology
- Immunology
- Cellular Biology
- Pathology
Background:
- DNA damage is a key factor in human diseases such as cancer, aging, and inflammation.
- The DNA damage response (DDR) is a cellular mechanism that repairs DNA lesions and maintains genomic stability.
- DDR pathways can also influence immune system activation.
Purpose of the Study:
- To review recent advances in understanding how the DNA damage response (DDR) activates immune signaling.
- To explore the molecular and cellular pathways linking DDR to immune activation.
- To examine the interplay between DNA damage, chronic inflammation, and human pathology.
Main Methods:
- Literature review of recent scientific advances.
- Analysis of molecular and cellular pathways involved in DDR and immune signaling.
- Synthesis of evidence on the bidirectional relationship between DNA damage and inflammation.
Main Results:
- Specific DDR components, including sensors, kinases, and effectors, trigger immune signaling.
- DNA damage can initiate and exacerbate chronic inflammatory conditions.
- Chronic inflammation can, in turn, lead to further DNA damage and disease development.
Conclusions:
- The DNA damage response plays a significant role in modulating immune responses.
- The intricate relationship between DNA damage and inflammation contributes to various human pathologies.
- Further research into DDR-mediated immune activation is crucial for understanding and treating diseases.
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