Relationship between DNA damage and total antioxidant capacity in patients with glioblastoma multiforme

Tüzgen S. , Hanımoğlu H. , Tanrıverdi T. , Kaçıra T. , Sanus G. Z. , Atukeren P. , ...Daha Fazla

CLINICAL ONCOLOGY, cilt.19, ss.177-181, 2007 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 19 Konu: 3
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.clon.2006.11.012
  • Dergi Adı: CLINICAL ONCOLOGY
  • Sayfa Sayıları: ss.177-181

Özet

Aims: To assess oxidative DNA damage and total antioxidant capacity (TAC) in glioblastoma multiforme (GBM) and to compare the results with normal brain tissues. Materials and methods: Oxidative DNA damage and TAC were evaluated in GBM tissues extracted from 26 patients and in normal brain tissues of 15 subjects who underwent autopsy within the first 4 h of death. Oxidative DNA damage was assessed by measuring 8-hydroxy-2-deoxyguanosine (8-OH-dG) using the 8-OH-dG enzyme immunoassay kit, a quantitative assay for 8-OH-dG, and TAC was analysed using the ImAnOx colorimetric test system for the determination of antioxidative capacity. The results were compared between two groups and any correlation between 8-OH-dG and TAC was sought. Results: The median level of TAC in GBM (121.5 nmol/g wet tissue) was remarkably lower than that in normal brain tissue (298 nmol/g wet tissue). The difference was statistically significant (P = 0.00001). In contrast, oxidative DNA damage was significantly higher in patients with GBM (74.9 ng/g wet tissue) than in controls (34.71 ng/g wet tissue). Again, the difference was statistically significant (P = 0.00001). We also found a negative correlation between oxidative DNA damage and TAC (P < 0.001). Conclusions: These findings indicate that the degree of oxidative DNA damage is increased and TAC is decreased in GBM. Oxidative DNA damage is correlated with the levels of TAC.