| First Author | Zhang QS | Year | 2008 |
| Journal | Cancer Res | Volume | 68 |
| Issue | 5 | Pages | 1601-8 |
| PubMed ID | 18316625 | Mgi Jnum | J:132758 |
| Mgi Id | MGI:3776926 | Doi | 10.1158/0008-5472.CAN-07-5186 |
| Citation | Zhang QS, et al. (2008) Tempol protects against oxidative damage and delays epithelial tumor onset in Fanconi anemia mice. Cancer Res 68(5):1601-8 |
| abstractText | Fanconi anemia (FA) is a genetic disorder characterized by congenital abnormalities, bone marrow failure, and marked cancer susceptibility. FA patients have an elevated risk of developing hematologic malignancies and solid tumors. Using Fancd2(-/-) knockout mice as a model of FA, we examined the potential of tempol, a nitroxide antioxidant and a superoxide dismutase mimetic, as a tumor-delaying agent for solid tumors. Dietary tempol increased the mean tumor-free survival time of Fancd2(-/-) Trp53(+/-) mice by 27% (P < 0.01), from 308 to 390 days, without changing the overall tumor spectrum. More strikingly, tempol delayed the onset of epithelial tumors and increased the mean epithelial tumor-free survival time by 38% (P < 0.0001), from 312 to 432 days, in Fancd2(-/-) Trp53(+/-) mice. These results show that tempol can significantly delay tumor formation in Fancd2(-/-) Trp53(+/-) mice. Furthermore, tempol treatment did not adversely affect the repopulating ability of FA hematopoietic stem cells. The reduction in oxidative DNA damage in tempol-treated FA fibroblasts and mice suggests that its tumor-delaying function may be attributed to its antioxidant activity. |
