title: Formation of diazoate intermediate upon nitrous acid and nitric oxide treatment of 2'-deoxyadenosine.
abstract: When 2'-deoxyadenosine was treated with HNO(2) or NO, a small amount of a previously unidentified product was formed. The product was also formed by the reaction of 2'-deoxyadenosine with isoamyl nitrite in tetrahydrofuran as a major product. The product was identified as a diazoate derivative of 2'-deoxyadenosine, a reaction intermediate. At the initial stage of the HNO(2) or NO reaction, the concentration of the diazoate was greater than or comparable to 2'-deoxyinosine, a deamination product of 2'-deoxyadenosine. The diazoate was fairly stable and decomposed with a half-life of 66h at pH 7.4 and 37 degrees C. These results suggest that the diazoate can be formed in cellular nucleosides or DNA with biologically relevant dose of HNO(2) and NO.
authors.affiliation: School of Pharmacy, Shujitsu University, 1-6-1 Nishigawara, Okayama 703-8516, Japan. tsuzuki@shujitsu.ac.jp
authors.forename: Toshinori
authors.initials: T
authors.lastname: Suzuki
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Iwakura
authors.forename: Yasuhide
authors.initials: Y
authors.lastname: Takashima
authors.forename: Naoki
authors.initials: N
authors.lastname: Kasajima
authors.forename: Michiyo
authors.initials: M
authors.lastname: Inukai
mesh_terms: D000588:Amines / Q000737:chemistry; D002621:Chemistry / Q000379:methods; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D002851:Chromatography, High Pressure Liquid; D003839:Deoxyadenosines / Q000737:chemistry*; D015195:Drug Design; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D009569:Nitric Oxide / Q000737:chemistry*; D009608:Nitrous Acid / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods; D013696:Temperature; D013997:Time Factors
chemical_list: D000588:Amines; D003839:Deoxyadenosines; D009569:Nitric Oxide; C058118:2'-deoxyadenosine; D009608:Nitrous Acid