Words similar to oh-dg
Example sentences for: oh-dg
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However, the nuclear localization of 8-OH-dG [ 32 ] and the increased Ogg1 reported here are consistent with a model in which mitochondrial Ogg1 is up-regulated but nuclear Ogg1 is not, leading to an increase in nuclear but not mitochondrial 8-OH-dG adducts [ 32 ] . Further studies will be required to resolve this issue, but β-cells in type 2 diabetes may well suffer from both nuclear and mitochondrial DNA damage, leading to decreased β-cell function and eventual loss of β-cell mass.
Such an apoptotic defect could account for the increasing intensity of Ogg1 staining, following accumulated levels of 8-OH-dG adducts with longer duration of diabetes.
Ogg1 knockout mice possess increased levels of 8-OH-dG in their genome, particularly in the mitochondrial genome, but do not seem to exhibit an increased frequency of malignancies [ 44 45 46 ] . It was postulated that the consequences of 8-OH-dG adducts and Ogg1 deficiency affects mainly cells with high oxygen metabolism and slow proliferation, such as liver cells [ 45 ] . While β-cells were not examined in that study, they certainly exhibit both high oxidative metabolism and a low rate of proliferation, consistent with them being a target for the effects of 8-OH-dG adducts.
Unfortunately, we were unable to obtain specific staining with antibodies to 8-OH-dG.
This enzyme is the major repair enzyme involved in the defense against accumulation of the 8-OH-dG adducts discussed above.