How do you test for 8-OHdG?
Enzyme-linked immunosorbent assay (ELISA) is widely used to detect 8-OHdG in urine or other biological samples with limit of detection (LOD) of one 8-OHdG/per 105 deoxyguanosine (dG).
What does high 8 hydroxy 2 deoxyguanosine mean?
High levels of 8-hydroxy-2-deoxyguanosine (8-OHdG), a biomarker of oxidative damage of DNA, have been found in patients with heart failure (HF). We performed a meta-analysis of the literature to investigate the association between 8-OHdG levels and HF.
What is 8 hydroxy 2′- deoxyguanosine 8-OHdG?
8-hydroxy-2′-deoxyguanosine (8-OHdG) is the most representative product of oxidative modifications of DNA, and urinary 8-OHdG is potentially the best non-invasive biomarker of oxidative damage to DNA. Herein, we developed a sensitive, specific and accurate method for quantification of 8-OHdG in human urine.
How does oxidation damage DNA?
Oxidative DNA damage provides direct routes to mutations. While guanine usually pairs with cytosine, 8-oxo-7,8-dihydroguanine (8-oxoG), the most frequent type of oxidative base damage, may cause mispairing with adenine through a conformational change. This is one route to oxidative DNA damage induced mutations.
How is 8 Oxo DG repaired?
The glycosylase/AP lyase reaction at the 8-oxodG lesion creates a single strand break that must be subsequently repaired by other downstream BER enzymes in order to complete repair (44, 51). Therefore, a high level of Fpg or OGG1 activity may promote cytotoxic DNA damage via accumulation of single strand breaks.
How is 8 Oxo DG formed?
The formation of 8-oxodG by lipid hydroperoxides seems to be due to the generation of reactive species other than superoxide radicals and hydrogen peroxide. These results indicate that some species formed during the reaction of lipid hydroperoxides with ferric ion can cause oxidative damage to DNA.
Can oxygen damage DNA?
Reactive oxygen species, endogenously or exogenously produced, are major contributors to DNA damage leading to disease.
What causes DNA oxidation?
Mechanisms of oxidative damage to DNA bases. Of the reactive oxygen species, the highly reactive hydroxyl radical (•OH) reacts with DNA by addition to double bonds of DNA bases and by abstraction of an H atom from the methyl group of thymine and each of the C-H bonds of 2′-deoxyribose (2).
What genes does Nrf2 regulate?
Those studies identified numerous NRF2 target genes that regulate glycolysis, pentose phosphate pathway (PPP), fatty acid metabolism, glutamine metabolism, and glutathione metabolism (Figure 3).
What is the function of Nrf2?
The nuclear factor erythroid 2–related factor 2 (Nrf2) is an emerging regulator of cellular resistance to oxidants. Nrf2 controls the basal and induced expression of an array of antioxidant response element–dependent genes to regulate the physiological and pathophysiological outcomes of oxidant exposure.
What are the markers of oxidative stress?
Many markers of oxidative stress have been proposed, including lipid hydro- peroxides, 4-hydroxynonenal, isoprostan, 8-hydroxyguanine, and ubiquinol-10.
What are three types of mutations in DNA?
There are three types of DNA Mutations: base substitutions, deletions and insertions. Single base substitutions are called point mutations, recall the point mutation Glu —–> Val which causes sickle-cell disease. Point mutations are the most common type of mutation and there are two types.
What oxygen does to DNA?
Oxygen radicals generated during reduction of O2 can attack DNA bases or deoxyribose residues to produce damaged bases or strand breaks (2). Alternatively, oxygen radicals can oxidize lipid or protein molecules to generate intermediates that react with DNA to form adducts (3).
How does oxygen affect DNA?
Can oxidants damage DNA?