Smoking-associated bulky DNA adducts in bronchial tissue related to CYP1A1 MspI and GSTM1 genotypes in lung patients

B. Schoket, David H. Phillips, Szilárd Kostic, István Vincze

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Abstract

Relationships between smoking status and levels of bulky DNA adducts were investigated in bronchial tissue of lung patients in relation to their GSTM1 and CYP1A1 MspI genotypes. A total of 150 Hungarian patients undergoing pulmonary surgery were included in the study, 124 with lung malignancies and 26 with non-malignant lung conditions. There were significant relationships between smoking status and bulky DNA adduct levels, as determined by 32P-post-labelling analysis, in macroscopically normal bronchial tissues. There was a highly significant difference in the adduct levels of a combined group consisting of current smokers and short-term ex-smokers (≤ 1 year abstinence) compared with life-time non-smokers and long-term ex-smokers (> 1 year abstinence) (P = 0.0001). The apparent half-life was estimated to be 1.7 years for bulky DNA adducts in the bronchial tissue from ex-smokers. There were no statistically significant correlations between (i) daily cigarette dose and DNA adduct levels in current smokers, (ii) DNA adduct level and histological type of lung cancer, or (iii) GSTM1 and CYP1A1 MspI genotypes and DNA adduct levels after adjustment for either smoking status or malignancy. By multiple logistic regression analysis, smoking and GSTM1 null genotype were found to be risk factors for squamous cell carcinoma. However, bulky DNA adduct levels in bronchial tissue did not appear to be a statistically-significant risk factor for the major histological types of lung cancer.

Original languageEnglish
Pages (from-to)841-846
Number of pages6
JournalCarcinogenesis
Volume19
Issue number5
DOIs
Publication statusPublished - May 1998

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Cytochrome P-450 CYP1A1
DNA Adducts
Smoking
Genotype
Lung
Lung Neoplasms
Tobacco Products
Half-Life
Squamous Cell Carcinoma
Neoplasms
Logistic Models
Regression Analysis

ASJC Scopus subject areas

  • Cancer Research

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Smoking-associated bulky DNA adducts in bronchial tissue related to CYP1A1 MspI and GSTM1 genotypes in lung patients. / Schoket, B.; Phillips, David H.; Kostic, Szilárd; Vincze, István.

In: Carcinogenesis, Vol. 19, No. 5, 05.1998, p. 841-846.

Research output: Contribution to journalArticle

Schoket, B. ; Phillips, David H. ; Kostic, Szilárd ; Vincze, István. / Smoking-associated bulky DNA adducts in bronchial tissue related to CYP1A1 MspI and GSTM1 genotypes in lung patients. In: Carcinogenesis. 1998 ; Vol. 19, No. 5. pp. 841-846.
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