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Main description:
"What is a nongenotoxic carcinogen?" This question recurred through out the Ernst Schering Research Foundation Workshop on nongeno toxic carcinogenesis, underlining the complexity of the topic. The clarity of the view that all carcinogens act by mutating DNA, origin ally advocated by Bruce Ames nearly 20 years ago, has been clouded by the increasing numbers of compounds which are not genotoxic but which nevertheless can cause cancer. There is an urgent need to in crease our understanding of these compounds so that their risks can be evaluated realistically and decisions made from a position of knowl edge and strength, rather than in fear of the unknown. A nongenotoxic carcinogen can be defined as a compound which causes cancer, but which does not cause damage to DNA as its primary biological activity. This negative definition covers a range of carci nogens acting through a variety of mechanisms. Such chemicals often produce tumours only in a single organ species, and there are a few common locations which are affected most often. For example, in male rats, certain carcinogens bind to az globulin to form a complex which 11 accumulates in the kidney tubular cells, which is followed by necrosis and compensatory cell proliferation leading the neoplasia. Other com mon mechanisms include hormonal imbalance resulting in thyroid tu mours or peroxisome proliferation resulting in liver cancer. These and other examples are studied in some detail in the papers of this book.
Contents:
1 Nongenotoxic Chemical Carcinogens: Evidence for Multiple Mechanisms.- 2 Oxidative Damage and Carcinogenesis.- 3 DNA Damage by Free Radicals. Mechanism, Meaning and Measurement.- 4 ?2u-Globulin Mediated Male Rat Kidney Carcinogenesis.- 5 Nongenotoxic Mechanisms in Thyroid Carcinogenesis.- 6 Nongenotoxic Carcinogenesis in the Liver.- 7 Compensatory Cell Proliferation, Mitogen-Induced Liver Growth and Hepatocarcinogenesis in the Rat.- 8 The Role of Genotoxic and Nongenotoxic Agents in Multistage Carcinogenesis of Mouse Skin.- 9 Liver Tumor Promotion and Breast Cancer Chemoprevention: Common Mechanisms.- 10 Peroxisome Proliferation and Hepatocarcinogenesis.- 11 Peroxisome Proliferators Mimic an Endogenous Inducer and Inactivate a Transcriptional Repressor in Bacillus megaterium.- 12 The Interaction of Genes and Hormones in Murine Hepatocarcinogenesis.- 13 Evaluating Carcinogenic Risks.
PRODUCT DETAILS
Publisher: Springer (Springer-Verlag Berlin and Heidelberg GmbH & Co. K)
Publication date: November, 2012
Pages: 240
Weight: 339g
Availability: Available
Subcategories: Biochemistry, Oncology, Pharmacology
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