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Cancer Epidemiology, Biomarkers & Prevention
Cancer Epidemiology, Biomarkers & Prevention
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Intraindividual and interindividual differences in metabolites of the tobacco-specific lung carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in smokers' urine.

S G Carmella, S A Akerkar, J P Richie Jr and S S Hecht
S G Carmella
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S A Akerkar
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J P Richie Jr
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S S Hecht
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DOI:  Published September 1995
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Abstract

This study describes quantitation in smokers' urine of two metabolites of the tobacco-specific lung carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK). The metabolites are 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL), which is also a lung carcinogen, and its O-glucuronide (NNAL-Gluc), a presumed detoxification product of NNK. Using updated methodology, levels of NNAL, NNAL-Gluc, and cotinine were determined in the urine of 61 smokers. The NNAL-Gluc: NNAL ratio, a potential marker for NNK detoxification potential, varied 16-fold in this group. Two phenotypes of this ratio were apparent; one ranging from 0 to 6 and found in 85% of the smokers and a second ranging from 6 to 11. The short-term and long-term consistency of the ratio was investigated. Studies carried out over a 4-5 day period indicated that the NNAL-Gluc: NNAL ratio was reasonably stable. Subjects who donated urine samples on two occasions separated by 4-16 months were classified in the same group (ratio range, 0-6 or 6-11) each time. Different urine collection protocols appeared to have little influence on the NNAL-Gluc: ratio. Thus, intraindividual differences in the NNAL-Gluc:NNAL ratio were generally small, whereas interindividual differences were large. Amounts of NNAL, NNAL-Gluc, and cotinine excreted by smokers were constant in 24-h samples obtained over a 3-day period of constant cigarette intake and controlled diet. Levels of NNAL, NNAL-Gluc, and NNAL plus NNAL-Gluc correlated with cotinine in a study of 61 smokers without controlled diet or smoking (r = 0.58; P < 0.0001).(ABSTRACT TRUNCATED AT 250 WORDS)

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September 1995
Volume 4, Issue 6
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Intraindividual and interindividual differences in metabolites of the tobacco-specific lung carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in smokers' urine.
S G Carmella, S A Akerkar, J P Richie Jr and S S Hecht
Cancer Epidemiol Biomarkers Prev September 1 1995 (4) (6) 635-642;

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Intraindividual and interindividual differences in metabolites of the tobacco-specific lung carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in smokers' urine.
S G Carmella, S A Akerkar, J P Richie Jr and S S Hecht
Cancer Epidemiol Biomarkers Prev September 1 1995 (4) (6) 635-642;
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