8-hydroxyadenine and Breast-Neoplasms

DNA of invasive ductal carcinomas from five women was analyzed for structural alterations in the purine nucleotides using gas chromatography-mass spectrometry with selected ion monitoring. The results were compared to those for a normal DNA control. The carcinoma DNA showed dramatically higher concentrations of the base modifications 8-hydroxy-guanine, 2,6-diamino-4-hydroxy-5-formamidopyrimidine, and 8-hydroxyadenine. For example, the concentration of total identified base modifications represented a more than 9-fold increase over the control value. Base modifications of this type, which arise from radical-induced hydroxylation and cleavage reactions of the purine ring, likely play a major role in initiation and probably contribute to the further transformation of neoplastic cells in cancer of the female breast.

Topics: Adenine; Breast Neoplasms; Carcinoma, Intraductal, Noninfiltrating; Cell Transformation, Neoplastic; Chromatography, Gas; DNA; Female; Guanine; Humans; Hydroxylation; Mass Spectrometry; Pyrimidines