Related Experiment Video
Updated: Jun 19, 2026
08:31
Characterizing DNA Repair Processes at Transient and Long-lasting Double-strand DNA Breaks by Immunofluorescence Microscopy
Published on: June 8, 2018
DNA repair: easy to visualize, difficult to elucidate.
1Department of Cancer Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR 7104, INSERM U 596, Centre Universitaire de Strasbourg, 67404 Illkirch CEDEX, France.
Trends in Cell Biology
|October 13, 2009
Summary
Understanding DNA repair is crucial for genome integrity. New methods reveal spatial and temporal regulation of DNA repair complexes and how double-strand breaks lead to translocations.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Faithful DNA damage repair is vital for maintaining genome stability.
- Biochemical and genetic studies have advanced DNA repair knowledge.
- Recent imaging techniques offer new insights into DNA repair dynamics.
Purpose of the Study:
- To review common tools for inducing and visualizing DNA repair.
- To discuss the advantages and disadvantages of these methods.
- To highlight the spatial and temporal regulation of DNA repair complex assembly.
Main Methods:
- Local induction of DNA damage.
- Advanced cell biological imaging techniques.
- Visualization of DNA double-strand breaks dynamics in living cells.
Main Results:
- DNA repair complex assembly is spatially and temporally regulated at damage sites.
- Visualization of double-strand breaks dynamics provides insights into chromosomal translocation formation.
- Commonly used tools for DNA repair research have specific advantages and disadvantages.
Conclusions:
- New imaging and damage induction methods enhance understanding of DNA repair.
- Studying DNA repair dynamics is key to understanding genome integrity and disease.
- Methodological choices impact the study of DNA repair processes.
Related Concept Videos
01:08Nucleotide Excision Repair
Overview
01:38Nucleotide Excision Repair
DNA Distortion and Damage
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...
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...
01:08Nucleotide Excision Repair
Overview
02:25Overview of DNA Repair
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
Chemically...
02:25Overview of DNA Repair
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
Chemically...
02:31Homologous Recombination
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...