title: Investigation of the relationships between plasma levels of ascorbate, vitamin E and beta-carotene and the frequency of sister-chromatid exchanges and release of reactive oxidants by blood leucocytes from cigarette smokers.
abstract: In this study the frequencies of sister-chromatid exchanges (SCEs) were correlated with measurements of the release of reactive oxidants by phagocytes, as determined by luminol-enhanced chemiluminescence (LECL), and levels of the anti-oxidants ascorbate, beta-carotene and vitamin E in blood specimens taken from 65 young asymptomatic cigarette smokers. Increased SCE frequencies correlated with LECL responses (p less than 0.0075) of activated blood phagocytes. Anti-oxidant levels did not correlate with either LECL or SCEs. These findings indicate that increased generation of reactive oxidants by circulating phagocytes from cigarette smokers are associated with cytogenetic changes.
authors.affiliation: Department of Medical Microbiology, University of Pretoria, R.S.A.
authors.forename: C E
authors.initials: CE
authors.lastname: van Rensburg
authors.forename: A
authors.initials: A
authors.lastname: Theron
authors.forename: G A
authors.initials: GA
authors.lastname: Richards
authors.forename: C A
authors.initials: CA
authors.lastname: van der Merwe
authors.forename: R
authors.initials: R
authors.lastname: Anderson
mesh_terms: D000328:Adult; D000367:Age Factors; D001205:Ascorbic Acid / Q000097:blood*; D002338:Carotenoids / Q000097:blood*; D005260:Female; D005609:Free Radicals; D006801:Humans; D007962:Leukocytes / Q000502:physiology*; D008163:Luminescent Measurements; D008214:Lymphocytes / Q000648:ultrastructure; D008297:Male; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000494:pharmacology; D010100:Oxygen / Q000378:metabolism*; D010586:Phagocytes / Q000502:physiology; D012737:Sex Factors; D012854:Sister Chromatid Exchange; D012907:Smoking / Q000097:blood*; D014810:Vitamin E / Q000097:blood*; D019207:beta Carotene
chemical_list: D005609:Free Radicals; D019207:beta Carotene; D014810:Vitamin E; D002338:Carotenoids; D009240:N-Formylmethionine Leucyl-Phenylalanine; D001205:Ascorbic Acid; D010100:Oxygen