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Mekenyan O, Todorov M, Serafimova R, Stoeva S, Aptula A, Finking R, Jacob E. Identifying the Structural Requirements for Chromosomal Aberration by Incorporating Molecular Flexibility and Metabolic Activation of Chemicals. Chem Res Toxicol 2007; 20:1927-41. [DOI: 10.1021/tx700249q] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ovanes Mekenyan
- Laboratory of Mathematical Chemistry, Bourgas As. Zlatarov University, 8010 Bourgas, Bulgaria, Safety Environmental Assurance Centre (SEAC), Unilever Colworth, Colworth House, Sharnbrook, Bedford MK44 1LQ, U.K., and Department of Product Safety, Regulations, Toxicology and Ecology, BASF Aktiengesellschaft, D-67056 Ludwigshafen, Germany
| | - Milen Todorov
- Laboratory of Mathematical Chemistry, Bourgas As. Zlatarov University, 8010 Bourgas, Bulgaria, Safety Environmental Assurance Centre (SEAC), Unilever Colworth, Colworth House, Sharnbrook, Bedford MK44 1LQ, U.K., and Department of Product Safety, Regulations, Toxicology and Ecology, BASF Aktiengesellschaft, D-67056 Ludwigshafen, Germany
| | - Rossitsa Serafimova
- Laboratory of Mathematical Chemistry, Bourgas As. Zlatarov University, 8010 Bourgas, Bulgaria, Safety Environmental Assurance Centre (SEAC), Unilever Colworth, Colworth House, Sharnbrook, Bedford MK44 1LQ, U.K., and Department of Product Safety, Regulations, Toxicology and Ecology, BASF Aktiengesellschaft, D-67056 Ludwigshafen, Germany
| | - Stoyanka Stoeva
- Laboratory of Mathematical Chemistry, Bourgas As. Zlatarov University, 8010 Bourgas, Bulgaria, Safety Environmental Assurance Centre (SEAC), Unilever Colworth, Colworth House, Sharnbrook, Bedford MK44 1LQ, U.K., and Department of Product Safety, Regulations, Toxicology and Ecology, BASF Aktiengesellschaft, D-67056 Ludwigshafen, Germany
| | - Aynur Aptula
- Laboratory of Mathematical Chemistry, Bourgas As. Zlatarov University, 8010 Bourgas, Bulgaria, Safety Environmental Assurance Centre (SEAC), Unilever Colworth, Colworth House, Sharnbrook, Bedford MK44 1LQ, U.K., and Department of Product Safety, Regulations, Toxicology and Ecology, BASF Aktiengesellschaft, D-67056 Ludwigshafen, Germany
| | - Robert Finking
- Laboratory of Mathematical Chemistry, Bourgas As. Zlatarov University, 8010 Bourgas, Bulgaria, Safety Environmental Assurance Centre (SEAC), Unilever Colworth, Colworth House, Sharnbrook, Bedford MK44 1LQ, U.K., and Department of Product Safety, Regulations, Toxicology and Ecology, BASF Aktiengesellschaft, D-67056 Ludwigshafen, Germany
| | - Elard Jacob
- Laboratory of Mathematical Chemistry, Bourgas As. Zlatarov University, 8010 Bourgas, Bulgaria, Safety Environmental Assurance Centre (SEAC), Unilever Colworth, Colworth House, Sharnbrook, Bedford MK44 1LQ, U.K., and Department of Product Safety, Regulations, Toxicology and Ecology, BASF Aktiengesellschaft, D-67056 Ludwigshafen, Germany
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Lu KH, Lue KH, Hsia TC, Chou MC, Lin KL, Chung JG. Oral administration of paclitaxel affects the distribution and metabolism of 2-aminofluorene in various tissues of Sprague-Dawley rats. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2005; 12:577-87. [PMID: 16121518 DOI: 10.1016/j.phymed.2004.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
To evaluate the question of whether or not paclitaxel affects the distribution and metabolism of chemical carcinogens such as 2-aminofluorene (AF) on Sprague-Dawley rats were examined. The AF, acetylated AF and AF metabolites were determined and examined by using high performance liquid chromatography. After having received AF only, AF with paclitaxel at the same time and paclitaxel pretreated for 24 h then treated with AF for 24 h, urine, stool and tissues such as liver, kidneys, stomach, colon, bladder and blood were collected and assayed for AF and its metabolites. Compared to the control group, paclitaxel caused an increase of the metabolites excreted in urine and stool. The major metabolite excreted in urine and stool was 9-OH-AAF. The liver is the major metabolism center and the major residual metabolite of AF in the liver was also 9-OH-AAF.
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Affiliation(s)
- K H Lu
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan, Republic of China
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Malejka-Giganti D, Ringer DP, Vijayaraghavan P, Kiehlbauch CC, Kong J. Aryl sulfotransferase IV deficiency in rat liver carcinogenesis initiated with diethylnitrosamine and promoted with N-2-fluorenylacetamide or its C-9-oxidized metabolites. Exp Mol Pathol 1997; 64:63-77. [PMID: 9316585 DOI: 10.1006/exmp.1997.2211] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Down regulation of aryl sulfotransferase IV (AST IV) in promotion/progression of liver carcinogenesis by N-2-fluorenylacetamide (2-FAA) has been established. This study examined whether the C-9 oxidized metabolites of 2-FAA, which have recently been shown to promote diethylnitrosamine (DEN)-initiated liver carcinogenesis in male Sprague-Dawley rats, effect the above change. Hence, in DEN-initiated rats, the effects of promoting regimens of 9-OH-2-FAA or 9-oxo-2-FAA, 15 oral doses at 50 and 100 mumol/kg of body weight, were compared to those of 2-FAA at 50 mumol/kg of body weight and of the vehicle on the activity of N-hydroxy(OH)-2-FAA sulfotransferase (ST), an isozyme of AST IV and AST IV expression and distribution. Relative to the vehicle, treatment with the fluorenyl compounds led to decreased levels in hepatic N-OH-2-FAA ST activity and development of hepatic nodules and tumors which had still lower levels of the ST activity than the respective remnant livers. At approximately 8 months after treatment with the C-9-oxidized compounds at doses twice that of 2-FAA, the extents of decreases in the hepatic N-OH-2-FAA ST activity and cytosolic AST IV protein in tumors were comparable to those with 2-FAA. Immunocytochemical analysis showed close association of AST IV deficiency with neoplastic liver lesions. In comparison to N-OH-2-FAA, 9-OH-2-FAA had only low and 9-oxo-2-FAA lacked sulfate acceptor activity in the presence of male rat liver cytosol or AST IV. At 3.3-fold greater concentration than N-OH-2-FAA, 9-oxo-2-FAA inhibited (27%) the sulfate acceptor activity of N-OH-2-FAA in the presence of AST IV, which suggested interference by 9-oxo-2-FAA at the active site. Although the C-9-oxidized compounds do not appear to be substrates for N-OH-2-FAA ST, their ability to cause a decrease in N-OH-2-FAA ST activity and protein similar to that of 2-FAA supports their role in hepatocarcinogenesis. Whereas 9-OH-2-FAA had a 3.9-fold greater sulfate acceptor activity in the presence of female than male rat liver cytosol and inhibited dehydroepiandrosterone ST activity of female rat liver, N-OH-2-FAA and 9-oxo-2-FAA inhibited estrone ST activity of male rat liver, suggesting that the C-9-oxidized compounds as well as N-OH-2-FAA are substrates for STs other than AST IV.
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