Genetics of DNA Repair
DNA repair mechanisms maintain genome integrity by correcting damage from oxidative stress, radiation, replication errors, and environmental mutagens. Genetic variants in DNA repair genes influence cancer susceptibility, ageing, and cellular resilience under chronic illness conditions.
This page is for educational and informational purposes only. Not a diagnostic tool. Always consult a qualified healthcare provider.
What is DNA Repair?
DNA is constantly damaged by endogenous (oxidative, replication errors) and exogenous (radiation, toxins) sources. Multiple repair pathways address different damage types: base excision repair (BER), nucleotide excision repair (NER), mismatch repair (MMR), and double-strand break repair (HR, NHEJ). Impaired DNA repair accelerates genomic instability, cellular senescence, and cancer risk. In the context of chronic illness, elevated oxidative stress in Long COVID and ME/CFS patients may increase DNA damage burden, and genetic variants reducing repair capacity may amplify cellular dysfunction.
Biological pathways commonly discussed in relation to DNA Repair
Research into DNA Repair and Genome Integrity has highlighted several biological pathways that may be relevant. Genetic variants within these pathways may influence individual susceptibility, symptom severity, or the trajectory of the condition.
Base Excision Repair
BER corrects small base lesions including those caused by oxidative stress. OGG1, MUTYH, and APEX1 variants affect BER efficiency. OGG1 Ser326Cys (rs1052133) reduces 8-oxoguanine repair and has been studied in cancer susceptibility.
Double Strand Break Repair
Homologous recombination (BRCA1, BRCA2, RAD51) and non-homologous end joining (Ku70, DNA-PKcs) repair double-strand breaks. ATM variants influence the DNA damage response checkpoint.
Nucleotide Excision Repair
NER removes bulky DNA adducts from UV radiation and chemical mutagens. XPC, ERCC1/2, and XPA variants affect NER capacity and photosensitivity.
Telomere Maintenance
Telomere shortening limits cell division capacity. TERT, TERC, and shelterin complex variants affect telomere length, cellular senescence, and ageing-related disease risk.
Key genes studied in relation to DNA Repair
The following genes have been studied in relation to DNA Repair and Genome Integrity. These genes span the biological pathways most commonly discussed in this area of research.
Genetic variants commonly discussed
The following genetic variants (SNPs) are found in genes that have been studied in relation to DNA Repair. Each variant represents a position in the genome where individuals may carry different alleles.
15 variants total across genes studied in relation to DNA Repair.
How personal DNA data may provide educational insights
Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may relate to areas such as DNA Repair.
This is not a diagnostic service. Genetic variants do not determine whether you have DNA Repair, nor do they predict your clinical outcomes. The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. All results should be discussed with a qualified healthcare provider.
Related conditions and pathways
DNA Repair shares biological pathways and genetic associations with the following related conditions and areas of research.
Frequently asked questions
How does DNA repair relate to chronic illness?
Elevated oxidative stress in Long COVID and ME/CFS may increase DNA damage burden. Genetic variants reducing DNA repair capacity — particularly base excision repair of oxidative lesions — may amplify cellular dysfunction and contribute to accelerated cellular ageing in chronic illness.
What is the OGG1 gene and why is it relevant?
OGG1 encodes 8-oxoguanine DNA glycosylase, which removes oxidatively damaged guanine bases. The Ser326Cys variant (rs1052133) reduces enzyme activity, impairing repair of oxidative DNA damage. It has been studied in relation to cancer susceptibility and oxidative stress sensitivity.
How do telomeres relate to chronic illness and ageing?
Telomeres shorten with each cell division, eventually triggering cellular senescence. Chronic inflammation and oxidative stress accelerate telomere shortening. Variants in TERT and TERC affecting telomerase activity may influence the rate of cellular ageing, with implications for age-related disease susceptibility.
Which DNA repair genes are most studied?
Key genes include BRCA1, BRCA2, ATM, CHEK2, OGG1, MUTYH, ERCC1, ERCC2, MLH1, MSH2, TERT, and TP53. These cover all major DNA repair pathways and genome integrity checkpoints.
Explore DNA insights
If you already have DNA data from 23andMe, AncestryDNA, or MyHeritage, upload your raw file to ChronicDNA and receive a personalised educational report covering genes studied in relation to DNA Repair and connected biological pathways.
Get Your Personalised DNA ReportInformational and educational only · Not a diagnostic tool · GDPR compliant
7 genes · 15 variants analysed in relation to DNA Repair