Facilitative mechanisms of lead as a carcinogen |
| |
Authors: | Silbergeld Ellen K |
| |
Affiliation: | Department of Environmental Health Sciences, Johns Hopkins University, Bloomberg School of Public Health, 615 N Wolfe Street, Baltimore, MD 21205, USA. esilberg@jhsph.edu |
| |
Abstract: | The carcinogenicity of lead compounds has received renewed attention because of continuing environmental and occupational sources of exposure in many countries. The epidemiological evidence for an association between lead exposures and human cancer risk has been strengthened by recent studies, and new data on mechanisms of action provide biological plausibility for assessing lead as a human carcinogen. Both epidemiological and mechanistic data are consistent with a facilitative role for lead in carcinogenesis, that is, lead by itself may not be both necessary and sufficient for the induction of cancer, but at a cellular and molecular level lead may permit or enhance carcinogenic events involved in DNA damage, DNA repair, and regulation of tumor suppressor and promoter genes. Some of these events may also be relevant to understanding mechanisms of lead-induced reproductive toxicity. |
| |
Keywords: | Lead Cancer DNA repair Zinc finger loop proteins p53 Oxidative damage |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|