Olive Oil Improves While Trans Fatty Acids Further Aggravate the Hypomethylation of LINE-1 Retrotransposon DNA in an Environmental Carcinogen Model.
Laszlo SzaboRichard MolnarAndras TomeszArpad DeutschRichard DaragoTimea VarjasZsombor RitterJozsef L SzentpeteriKitti AndreideszDomokos MatheImre HegedüsAttila SikFerenc BudanIstvan KissPublished in: Nutrients (2022)
DNA methylation is an epigenetic mechanism that is crucial for mammalian development and genomic stability. Aberrant DNA methylation changes have been detected not only in malignant tumor tissues; the decrease of global DNA methylation levels is also characteristic for aging. The consumption of extra virgin olive oil (EVOO) as part of a balanced diet shows preventive effects against age-related diseases and cancer. On the other hand, consuming trans fatty acids (TFA) increases the risk of cardiovascular diseases as well as cancer. The aim of the study was to investigate the LINE-1 retrotransposon (L1-RTP) DNA methylation pattern in liver, kidney, and spleen of mice as a marker of genetic instability. For that, mice were fed with EVOO or TFA and were pretreated with environmental carcinogen 7,12-dimethylbenz[a]anthracene (DMBA)-a harmful substance known to cause L1-RTP DNA hypomethylation. Our results show that DMBA and its combination with TFA caused significant L1-RTP DNA hypomethylation compared to the control group via inhibition of DNA methyltransferase (DNMT) enzymes. EVOO had the opposite effect by significantly decreasing DMBA and DMBA + TFA-induced hypomethylation, thereby counteracting their effects.
Keyphrases
- dna methylation
- fatty acid
- genome wide
- circulating tumor
- gene expression
- cell free
- single molecule
- copy number
- papillary thyroid
- cardiovascular disease
- squamous cell
- high fat diet induced
- nucleic acid
- physical activity
- type diabetes
- childhood cancer
- human health
- drug induced
- lymph node metastasis
- diabetic rats
- wild type