Ciga
rette smoking has been associated with va
rious cance
rs including bladde
r and panc
reas.4-Aminobiphenyl has been isolated as a constituent of ciga
rette smoke and has been establishedas a ca
rcinogen in va
rious animal models and humans. In
rodents and humans, 4-aminobiphenyl is N-hyd
roxylated and fo
rms adducts to DNA, the p
redominant one being
N-(deoxyguanosin-8-yl)-4-aminobiphenyl (dG-C8-ABP). In this study, we
repo
rt a mic
ro-elect
rosp
raymass spect
romet
ric (
![](/images/entities/mg<font color=)
r.gif">ESI-MS) isotope dilution method fo
r the detection and quantification ofdG-C8-ABP in human panc
reatic tissue. A
reve
rse phase capilla
ry column (320
![](/images/entities/mg<font color=)
r.gif">m ID) wasconnected to a t
riple quad
rupole mass spect
romete
r via a comme
rcially available mic
ro-ESIsou
rce. The system was ope
rated in the selected
reaction monito
ring mode t
ransmitting the[M + H]
+ ![](/images/entities/<font color=)
ra
rr.gif"> [M + H - 116]
+ t
ransitions fo
r both the analyte and the isotopically labeled inte
rnalstanda
rd. Twelve human panc
reas samples we
re analyzed, whe
re six we
re cu
rrent smoke
rs(th
ree male and th
ree female) and six we
re conside
red nonsmoke
rs (th
ree female and th
reemale). Of the samples analyzed, six showed dG-C8-ABP levels above the limit of quantificationfo
r the method, five we
re conside
red to have levels that we
re undetectable, and one wasdisca
rded due to inconsistent inte
rnal standa
rd signal. The age of the human subjects
rangedf
rom 17 to 63, and, in samples whe
re adduct was p
resent, levels
ranged anywhe
re f
rom 1 to60/10
8 nucleotides. Although no co
rrelation between smoking p
refe
rence, age, o
r gende
r wasp
roven with this pa
rticula
r sample pool, this
repo
rt demonst
rates that capilla
ry LC-
![](/images/entities/mg<font color=)
r.gif">ESI-MScan p
rovide a sensitive and definitive method fo
r DNA adduct analysis in human tissue.