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Interactions in Metal Toxicology
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Miljömedicin.
Vise andre og tillknytning
2007 (engelsk)Inngår i: Handbook on the Toxicology of Metals, 3rd Edition / [ed] Gunnar F. Nordberg, Bruce A. Fowler, Monica Nordberg and Lars T. Friberg, San Diego: Elsevier, 2007, 3, s. 117-145Kapittel i bok, del av antologi (Annet vitenskapelig)
Abstract [en]

Human exposures to metals and metalloids such as arsenic frequently occur as mixtures, and hence it is important to consider interactions among these elements in terms of both mechanisms of action and for risk assessment purposes. Interactions among these elements may produce additive, synergistic/potentiative, or antagonistic effects that may be manifested as direct cellular toxicity (necrosis or apoptosis) or carcinogenicity. Dose-response relationships may further be influenced by constitutive factors such as age, sex, and the expression of specific proteins. The roles of molecular factors regulated by specific genes (so called gene-environment interactions) for the expression of metal toxicity are known only to a limited extent for most metals. However, for chronic beryllium disease causing fibrosis of the lung, it has been shown that beryllium sensitization, a prerequisite for developing the disease, depends on an antigen-specific immune response occurring predominantly among persons with a specific HLA-DBP1 genotype. Some gene-environment interactions in terms of genetic polymorphisms have been demonstrated such as those involving ALAD and arsenic methyl transferases, but the importance of these observations for development of human diseases has not been fully explored. Mechanisms of importance for interactions and the development of toxicity are the expression of metal-binding proteins (metallothioneins or lead-binding proteins). In many cases, direct primary data on interactions among toxic or essential elements are lacking, and so innovative derivative methods such as the binary weight of evidence (BINWOE) method have been used to predict potential interactions among groups of metals and metalloids. At present, there is much to be learned about interactions among both toxic and essential elements, but this is clearly a critical area of research.

sted, utgiver, år, opplag, sider
San Diego: Elsevier, 2007, 3. s. 117-145
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URN: urn:nbn:se:umu:diva-76458DOI: 10.1016/B978-012369413-3/50062-8ISI: 000311285300009ISBN: 978-0-12-369413-3 (tryckt)OAI: oai:DiVA.org:umu-76458DiVA, id: diva2:636771
Tilgjengelig fra: 2013-07-12 Laget: 2013-07-09 Sist oppdatert: 2018-06-08bibliografisk kontrollert

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