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The expression of xenobiotic-metabolizing enzymes in human prostate and in prostate epithelial cells (PECs) derived from primary cultures

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Date
2006-06-01
ICR Author
Phillips, David Hunter
Cole, Kathleen
Author
Al-Buheissi, SZ
Cole, KJ
Hewer, A
Kumar, V
Bryan, RL
Hudson, DL
Patel, HR
Nathan, S
Miller, RA
Phillips, DH
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Type
Journal Article
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Abstract
BACKGROUND. Dietary heterocyclic amines (HCAs) are carcinogenic in rodent prostate requiring activation by enzymes such as cytochrome P450 (CYP) and N-acetyltransferase (NAT). METHODS. We investigated by Western blotting and immunohistochemistry the expression of CYP1A1, CYP1A2, and NAT1 in human prostate and in prostate epithelial cells (PECs) derived from primary cultures and tested their ability to activate the dietary carcinogen 2amino-3-methylimidazo[4,5-f]quinoline (IQ) and its N-hydroxy metabolite (N-OH-IQ) to DNA-damaging moieties. RESULTS. Western blotting identified CYP1A1, CYP1A2, and NAT1. Immunohistochemistry localized NAT1 to the cytoplasm of PECs. Inter-individual variation was observed in the expression levels of CYP1A1, 1A2, and NAT1 (11, 75, and 35-fold, respectively). PECs expressed CYP1A1 and NAT1 but not CYP1A2. When incubated with IQ or N-01-14Q, PECs formed DNA adducts indicating their ability to metabolically activate these compounds. CONCLUSIONS. Prostate cells possess the capacity to activate dietary carcinogens. PECs may provide a useful model system to study their role in prostate carcinogenesis.
URI
https://repository.icr.ac.uk/handle/internal/2528
DOI
https://doi.org/10.1002/pros.20400
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Research team
Human Biomonitoring & Carcinogen Activation
Language
eng
License start date
2006-06-01
Citation
PROSTATE, 2006, 66 pp. 876 - 885
Publisher
WILEY-BLACKWELL

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