Characterization of <i>N</i><sup>1</sup>- and <i>N</i><sup>6</sup>-Adenosine Adducts and <i>N</i><sup>1</sup>-Inosine Adducts Formed by the Reaction of Butadiene Monoxide with Adenosine: Evidence for the <i>N</i><sup>1</sup>-Adenosine Adducts as Major Initial Products
作者:Rebecca R. Selzer、Adnan A. Elfarra
DOI:10.1021/tx960039a
日期:1996.1.1
at pH 7.4 at 37 degrees C (half-life of 7 and 9.5 h for the two regioisomers), were characterized by their UV spectra and their ability to undergo the Dimroth rearrangement to yield the corresponding N6-adenosine adducts, or undergo deamination to yield the corresponding N1-inosine adducts. Upon the reaction of BM with adenosine in phosphate buffer (pH 7.4) at 37 degrees C, the N1-adenosine adducts were
1,3-丁二烯是已知的人类诱变剂和可能的人类致癌物;然而,对其活性的分子机制了解甚少。先前我们已经表明,主要代谢物一氧化二丁酯(BM)与鸟苷反应形成N1-,N2-和N7-鸟苷加合物。在这项研究中,我们表征了BM与腺苷的反应。鉴定为N1-(1-羟基-3-丁烯-2-基)腺苷,N1-(2-羟基-3-丁烯-1-基)腺苷,N6-(1-羟基-3-非对映异构体对的十个加合物表征了丁烯-2-基)腺苷,N6-(2-羟基-3-丁烯-+ ++ 1基)腺苷和N1-(1-羟基-3-丁烯-2-基)肌苷。N6-腺苷和N1-肌苷加合物的特征在于其紫外光谱,1 H NMR,FAB / MS和稳定性研究。N6-腺苷和N1-肌苷加合物在磷酸盐缓冲液(pH 7.4)中在37摄氏度下稳定长达168小时。N1-腺苷加合物在37℃的pH 7.4下不稳定(两种区域异构体的半衰期分别为7和9.5小时),其特征在于它们的UV光谱和经历Dim