John, Kaarthik and Ragavan, Narasimhan and Pratt, M. Margaret and Singh, Paras B. and Al-Buheissi, Salah and Matanhelia, Shyam S. and Phillips, David H. and Poirier, Miriam C. and Martin, Frank L. (2009) Quantification of phase I/II metabolizing enzyme gene expression and polycyclic aromatic hydrocarbon-DNA adduct levels in human prostate. The Prostate, 69 (5). pp. 505-519. ISSN 0270-4137
Full text not available from this repository.Abstract
BACKGROUND Studies of migrant populations suggest that dietary and/or environmental factors play a crucial role in the etiology of prostatic adenocarcinoma (CaP). The human prostate consists of the peripheral zone (PZ), transition zone (TZ), and central zone (CZ); CaP occurs most often in the PZ. METHODS To investigate the notion that an underlying differential expression of phase I/II genes, and/or the presence of polycyclic aromatic hydrocarbon (PAH)-DNA adducts might explain the elevated PZ susceptibility, we examined prostate tissues (matched tissue sets consisting of PZ and TZ) from men undergoing radical retropubic prostatectomy for CaP (n = 26) or cystoprostatectomy (n = 1). Quantitative gene expression analysis was employed for cytochrome P450 (CYP) isoforms CYP1A1, CYP1B1, and CYP1A2, as well as N-acetyltransferase 1 and 2 (NAT1 and NAT2) and catechol-O-methyl transferase (COMT). RESULTS CYP1B1, NAT1, and COMT were expressed in all tissue sets; levels of CYP1B1 and NAT1 were consistently higher in the PZ compared to TZ. Immunohistochemistry confirmed the presence of CYP1B1 (nuclear-associated and primarily in basal epithelial cells) and NAT1. Normal tissue from 23 of these aforementioned 27 matched tissue sets was analyzed for PAH-DNA adduct levels using antiserum elicited against DNA modified with r,7t8-dihydroxy-t-9,10-oxy-7,8,9,10-tetrahydro-benzo[a]pyrene (BPDE). PAH-DNA adduct levels were highest in glandular epithelial cells, but a comparison of PZ and TZ showed no significant differences. CONCLUSION Although expression of activating and/or detoxifying enzymes may be higher in the PZ, PAH-DNA adduct levels appear to be similar in both zones. Therefore, factors other than PAH-DNA adducts may be responsible for promotion of tumor formation in the human prostate.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | The Prostate |
| Uncontrolled Keywords: | automated cellular imaging system • immunohistochemistry • peripheral zone • radical retropubic prostatectomy • RT-PCR • transition zone |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Departments: | Faculty of Science and Technology > Lancaster Environment Centre |
| ID Code: | 31358 |
| Deposited By: | Mr Richard Ingham |
| Deposited On: | 13 Jan 2010 11:36 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 16:56 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/31358 |
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