| First Author | Mabley JG | Year | 2005 |
| Journal | FASEB J | Volume | 19 |
| Issue | 2 | Pages | 290-2 |
| PubMed ID | 15677345 | Mgi Jnum | J:105080 |
| Mgi Id | MGI:3613405 | Doi | 10.1096/fj.04-2278fje |
| Citation | Mabley JG, et al. (2005) Potential role for 8-oxoguanine DNA glycosylase in regulating inflammation. FASEB J 19(2):290-2 |
| abstractText | OGG-1 DNA glycosylase (OGG-1) is an enzyme involved in DNA repair. It excises 7,8-dihydro-8-oxoguanine, which is formed by oxidative damage of guanine. We have investigated the role of OGG-1 in inflammation using three models of inflammation: endotoxic shock, diabetes, and contact hypersensitivity. We found that OGG-1(-/-) mice are resistant to endotoxin (lipopolysaccharide, LPS)-induced organ dysfunction, neutrophil infiltration and oxidative stress, when compared with the response seen in wild-type controls (OGG(+/+)). Furthermore, the deletion of the OGG-1 gene was associated with decreased serum cytokine and chemokine levels and prolonged survival after LPS treatment. Type I diabetes was induced by multiple low-dose streptozotocin treatment. OGG-1(-/-) mice were found to have significantly lower blood glucose levels and incidence of diabetes as compared with OGG-1(+/+) mice. Biochemical analysis of the pancreas showed that OGG-1(-/-) mice had greater insulin content, indicative of a greater beta-cell mass coupled with lower levels of the chemokine MIP-1alpha and Th1 cytokines IL-12 and TNF-alpha. Levels of protective Th2 cytokines, IL-4 and IL-10 were significantly higher in the pancreata of OGG-1(-/-) mice as compared with the levels measured in wild-type mice. In the contact hypersensitivity induced by oxazolone, the OGG-1(-/-) mice showed reduced neutrophil accumulation, chemokine, and Th1 and Th2 cytokine levels in the ear tissue. The current studies unveil a role for OGG-1 in the regulation of inflammation. |
