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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
Capability of Human Blood Cells to Form the DNA-adduct, C8-(N2-aminofluorenyl) Deoxyguanosine, from 2-aminofluorene.
Carcinogenesis 11, 1441-1444 (1990)
Human blood cells, separated by Ficoll-Hypaque centrifugation, were tested for their ability to catalyze the formation of DNA adducts of 2-aminofluorene (AF), using the 32P-postlabeling procedure for adduct analysis. Incubation of neutrophils with AF, hydrogen peroxide and exogenous DNA yielded a single DNA adduct identified as C8-(N2-aminofluorenyl)-deoxyguanosine-3'-5'-diphosphate (AFdG) by cochromatography with a standard sample. AFdG levels in intact cells, lysed cells and in the granule fraction prepared from cell lysates were 102, 894 and 240 AFdG adducts/10(9) nucleotides/30 min respectively. AFdG levels corresponded to the activity of neutrophil peroxidase in these preparations. The monocyte/lymphocyte fraction yielded a low amount of 30 and 40 AFdG/10(9) nucleotides/30 min in the presence of hydrogen peroxide and of NADPH respectively. Erythrocytes did not generate a detectable level of AFdG, neither as intact cells nor as cell lysates. Whole blood samples likewise did not generate AFdG. Our findings reveal that, among blood cells, only neutrophils are capable of forming a biologically significant DNA adduct of aminofluorene in reasonable amounts and suggest that myeloperoxidase was the catalyzing enzyme.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
ISSN (print) / ISBN
0143-3334
e-ISSN
1460-2180
Zeitschrift
Carcinogenesis
Quellenangaben
Band: 11,
Heft: 8,
Seiten: 1441-1444
Verlag
Oxford University Press
Begutachtungsstatus
Peer reviewed
Institut(e)
Institut für Toxikologie