O6-Alkylguanine-DNA alkyltransferase activity in schistosomiasis-associated human bladder cancer
| Autor: | R J Barnard, T Aboul-Azm, Donald P. Cooper, Alaa F. Badawi, Mostafa H. Mostafa, Geoffrey P. Margison, Peter J O'Connor |
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| Rok vydání: | 1994 |
| Předmět: |
Male
Cancer Research Pathology medicine.medical_specialty Urinary Bladder Schistosomiasis Biology medicine.disease_cause O(6)-Methylguanine-DNA Methyltransferase Schistosomiasis haematobia chemistry.chemical_compound medicine Carcinoma Humans Deoxyguanosine Bladder cancer Urinary bladder Epithelioma Cancer DNA Neoplasm Methyltransferases medicine.disease Neoplasm Proteins medicine.anatomical_structure Urinary Bladder Neoplasms Oncology chemistry Cancer research Female Carcinogenesis |
| Zdroj: | European Journal of Cancer. 30:1314-1319 |
| ISSN: | 0959-8049 |
| DOI: | 10.1016/0959-8049(94)90180-5 |
| Popis: | O6-Alkylguanine-DNA-alkyltransferase (ATase) activity was measured in extracts of 55 bladder tissue samples (46 tumour and nine uninvolved mucosal tissue) from Egyptian patients with schistosome-associated bladder carcinoma. Activity varied from 2.0 to 16.2 fmole ATase/microgram DNA (mean +/- S.D.; 5.6 +/- 4.0) or from 28 to 351 fmole ATase/mg (117 +/- 71). ATase levels in schistosome-associated bladder cancer tissues (5.6 +/- 4.0 fmole ATase/microgram DNA) tended to be lower than those observed in normal human bladder mucosal tissue (8.5 +/- 4.4 fmole ATase/microgram DNA). In a previous study (Badawi et al., Carcinogenesis, 1992, 13, 877-881) DNA-alkylation damage (O6-methyldeoxyguanosine) was found in 44/46 of these schistosome-associated bladder cancer samples at levels ranging from 0.012 to 0.485 mumole O6-MedG/mole deoxyguanosine. We now report an inverse correlation between the levels of methylation damage and ATase activity (r = -0.67; P0.001). These observations encourage further investigations of the possible role of environmental alkylating agents in the aetiology of early bladder cancer associated with schistosomiasis. |
| Databáze: | OpenAIRE |
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