Related Experiment Video
Updated: Jul 16, 2026
Visualizing and Quantifying Endonuclease-Based Site-Specific DNA Damage
Published on: August 21, 2021
Dietary and genetic modulation of DNA repair in healthy human adults
1Human Nutrition Research Centre, School of Clinical Medical Sciences, Framlington Place, Newcastle University, Newcastle upon Tyne NE2 4HH, UK. john.tyson@ncl.ac.uk
Abstract:
The DNA in all cells of the human body is subject to damage continuously from exogenous agents, internal cellular processes and spontaneous decomposition. Failure to repair such damage is fundamental to the development of many diseases and to ageing. Fortunately, the vast majority of DNA damage is detected and repaired by one of five complementary DNA repair systems. However, recent studies have shown that even in healthy individuals there is a wide inter-individual variation in DNA repair capacity. Part of this variation can be accounted for by polymorphisms in the genes encoding DNA repair proteins. However, it is probable that environmental factors, including dietary exposure as well as diet-gene interactions, are also responsible for much of the difference in repair capacity between individuals. Whilst there is some evidence from human studies that generalised malnutrition or low intakes of specific nutrients may affect DNA repair, as yet there is limited understanding of the molecular mechanisms through which nutrients can modulate this key cellular process.
Insights
DNA damage is constant, but repair systems usually fix it. Individual differences in DNA repair capacity exist, influenced by genetics and possibly diet.
Area of Science:
- Molecular Biology
- Genetics
- Nutritional Science
Background:
- DNA damage is a continuous threat to human cells, arising from external and internal sources.
- Failure in DNA repair is linked to aging and various diseases.
- Five complementary DNA repair systems exist, but individual repair capacity varies significantly.
Purpose of the Study:
- To explore the factors contributing to inter-individual variations in DNA repair capacity.
- To investigate the potential role of environmental factors, particularly diet, in modulating DNA repair.
- To understand the molecular mechanisms underlying nutrient-influenced DNA repair.
Main Methods:
- Analysis of genetic polymorphisms in DNA repair proteins.
- Review of human studies on malnutrition and nutrient intake effects on DNA repair.
- Exploration of diet-gene interactions in relation to DNA repair capacity.
Main Results:
- Significant inter-individual variation in DNA repair capacity is observed even in healthy individuals.
- Genetic polymorphisms in DNA repair genes partially explain these variations.
- Environmental factors, including diet and specific nutrient intake, are likely significant contributors to repair capacity differences.
Conclusions:
- DNA repair capacity is influenced by a combination of genetic predisposition and environmental exposures.
- Diet and specific nutrients may play a crucial role in modulating DNA repair efficiency.
- Further research is needed to elucidate the molecular pathways through which nutrients impact DNA repair processes.
More Related Videos
Related Concept Videos
01:38Nucleotide 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...
01:08Nucleotide Excision Repair
01:08Nucleotide Excision Repair
02:25Overview of DNA Repair
Chemically...
02:25Overview of DNA Repair
Chemically...
02:36DNA Damage can Stall the Cell Cycle