Hemoglobin and DNA adduct formation in Fischer-344 rats exposed to 2,4- and 2,6-toluene diamine
| العنوان: | Hemoglobin and DNA adduct formation in Fischer-344 rats exposed to 2,4- and 2,6-toluene diamine |
|---|---|
| المؤلفون: | Patrick M. Wilson, John R. Froines, David K. La |
| المصدر: | Archives of Toxicology. 70:591-598 |
| بيانات النشر: | Springer Science and Business Media LLC, 1996. |
| سنة النشر: | 1996 |
| مصطلحات موضوعية: | Male, chemistry.chemical_classification, Sulfotransferase, Erythrocyte clearance, Stereochemistry, Health, Toxicology and Mutagenesis, General Medicine, Phenylenediamines, Toxicology, Medicinal chemistry, Rats, Inbred F344, Rats, Adduct, DNA Adducts, Hemoglobins, Enzyme, Sulfation, chemistry, DNA adduct, Carcinogens, Microsome, Animals, Hemoglobin |
| الوصف: | Using gas chromatography/mass spectrometry for detection of hemoglobin adducts, and 32P-postlabelling for DNA adducts, we examined macromolecular binding in Fischer-344 rats administered 2,4- or 2,6-toluene diamine (TDA). The dose-response and correlative relationship between the two macromolecules were investigated over a range of doses (0–250 mg/kg). The time course of adduct formation and removal was also examined. Both TDA isomers induced formation of hemoglobin adducts, but only the 2,4-isomer induced DNA binding. Maximum hemoglobin and DNA adduct levels were detected 24 h following administration. Both hemoglobin and DNA binding increased in a dose-dependent manner. Hemoglobin adduct clearance demonstrated a nonlinear decay, with adduct loss occurring faster than normal erythrocyte clearance. The effects of metabolic inhibitors on adduct formation were examined using piperonyl butoxide and pentachlorophenol to inhibit p450 isozymes and sulfotransferase, respectively. Microsomal enzymatic activation was critical to hemoglobin adduct formation with inhibition by piperonyl butoxide reducing adduct yields by over 90%. Sulfation did not appear to play a significant role in TDA-induced hemoglobin adduct formation. |
| تدمد: | 1432-0738 0340-5761 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15c105b8362fe1e33e992c0eca3497a5Test https://doi.org/10.1007/s002040050317Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....15c105b8362fe1e33e992c0eca3497a5 |
| قاعدة البيانات: | OpenAIRE |
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