Related Experiment Video
Updated: Aug 24, 2026

Visualizing and Quantifying Endonuclease-Based Site-Specific DNA Damage
Published on: August 21, 2021
The role of endogenous and exogenous DNA damage and mutagenesis
Errol C Friedberg1, Lisa D McDaniel, Roger A Schultz
1Laboratory of Molecular Pathology, Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9072, USA. errol.friedberg@utsouthwestern.edu
Abstract:
The field of DNA damage responsiveness in general, and the consequences of endogenous and exogenous base damage in DNA, in particular, has made new and exciting contributions to our increasing understanding of the initiation and progression of neoplasia in humans. This article presents some of the highlights in this area of investigation, with a particular emphasis on DNA repair, the tolerance of DNA damage and its contribution to mutagenesis, and DNA damage checkpoint regulation.
Insights
DNA damage responsiveness, including DNA repair and tolerance, significantly impacts human neoplasia initiation and progression. Understanding these processes is crucial for cancer research and treatment strategies.
Area of Science:
- Molecular Biology
- Genetics
- Cancer Research
Background:
- DNA damage is a critical factor in the development of human cancers.
- Endogenous and exogenous DNA base damage contribute to disease initiation and progression.
- Understanding DNA damage response pathways is essential for comprehending neoplasia.
Purpose of the Study:
- To highlight key advancements in DNA damage responsiveness research.
- To emphasize the roles of DNA repair, damage tolerance, and mutagenesis in cancer.
- To discuss the significance of DNA damage checkpoint regulation.
Main Methods:
- Review of current scientific literature on DNA damage and repair.
- Analysis of the interplay between DNA damage tolerance and mutagenesis.
- Examination of DNA damage checkpoint control mechanisms.
Main Results:
- Significant progress has been made in understanding how cells respond to DNA damage.
- DNA repair mechanisms are vital for preventing mutations that lead to cancer.
- DNA damage tolerance can contribute to mutagenesis, promoting cancer development.
Conclusions:
- Advances in DNA damage responsiveness offer new insights into human neoplasia.
- Targeting DNA repair and checkpoint pathways holds therapeutic potential for cancer.
- Further research into DNA damage tolerance is needed to fully understand its role in mutagenesis.
Related Concept Videos
Spontaneous and Induced Mutations
Nucleotide Excision Repair
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Nucleotide Excision Repair
Nucleotide Excision Repair
Overview of DNA Repair
Chemically...
Overview of DNA Repair
Chemically...
