With this approach, the amount of damaged mtDNA copies/cell, total mtDNA copies/cell, and baseline mtDNA damage (ratio of damaged mtDNA/total mtDNA) were quantified simultaneously.
Because both protein oxidation and mtDNA damage can be mediated by several different reactive species, the results presented in Figure 2A and E are not inconsistent with this concept.
Nevertheless, evidence is emerging that mtDNA damage has direct effects on the malignant phenotype and that these effects are mediated by reactive oxygen species (ROS; Petros et al, 2005; Ishikawa et al, 2008).
Folate deficiency may contribute to neurodegeneration via mtDNA damage.
This study establishes, for the first time, that mtDNA degradation can be a direct and immediate consequence of persistent mtDNA damage and that increased ROS production is not an invariant consequence of mtDNA damage.
The presence of these cytokines coincides with the presence of mtDNA damage.
However, a paucity of information still exists regarding the physiological effects of persistent mtDNA damage.
However, despite the subsequent presence of mtDNA damage in the photoreceptors, apoptosis is not a characteristic of early EAU.
Considerable progress has been made recently toward understanding the processes of mitochondrial DNA (mtDNA) damage and repair.
We showed that DNA polymerase γ, which is responsible for mtDNA synthesis, is inhibited by ara-C and that sublethal ara-C exposure of DRG neurons leads to reduction in mtDNA content, ROS generation, oxidative mtDNA damage formation, compromised mitochondrial respiration and diminution of NADPH and GSH stores, as well as, activation of the DNA damage response.
