Reaction of epichlorohydrin with adenosine, 2'-deoxyadenosine and calf thymus DNA: identification of adducts.

Abstract:

:Epichlorohydrin (a probable human carcinogen) was allowed to react with adenosine and the adducts were characterized by NMR and UV spectroscopy, and mass spectrometry. The adduct initially formed was 1-(3-chloro-2-hydroxypropyl)-adenosine, which subsequently ring closures to 1,N(6)-(2-hydroxypropyl)-adenosine at neutral and basic conditions. At acid conditions, the N-1 adduct undergoes a slow deamination to yield 1-(3-chloro-2-hydroxypropyl)-inosine. Minor adducts identified were 7-(3-chloro-2-hydroxypropyl)-adenosine and 3-(3-chloro-2-hydroxypropyl)-adenosine which are easily deglycosylated, and an adduct where the epichlorohydrin residue was attached to the sugar moiety of adenosine. A diadduct, 1,N(6)-(2-hydroxypropyl)-N(6)-(3-chloro-2-hydroxypropyl)-adenosine was also identified. The reaction of epichlorohydrin with calf thymus DNA gave 1,N(6)-(2-hydroxypropyl)-deoxyadenosine and 3-(3-chloro-2-hydroxypropyl)-adenine (major adduct).

journal_name

Bioorg Chem

journal_title

Bioorganic chemistry

authors

Sund P,Kronberg L

doi

10.1016/j.bioorg.2006.01.005

subject

Has Abstract

pub_date

2006-06-01 00:00:00

pages

115-30

issue

3

eissn

0045-2068

issn

1090-2120

pii

S0045-2068(06)00014-9

journal_volume

34

pub_type

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