Refining the threshold of toxicological concern (TTC) for risk prioritization of trace chemicals in food
| Autor: | Thomas D. Trautman, Susan P. Felter, Marie E. Latulippe, Joseph Scimeca, Richard W. Lane, G. Craig Llewellyn, Stephen S. Olin |
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| Rok vydání: | 2008 |
| Předmět: |
Prioritization
Computer science Food Contamination Toxicology Risk Assessment Food Supply Xenobiotics Structure-Activity Relationship Food supply Humans No-Observed-Adverse-Effect Level Food security Dose-Response Relationship Drug business.industry Potential risk General Medicine Legislation Food Food safety Food Analysis Risk analysis (engineering) Human exposure business Risk assessment Food Science Mutagens |
| Zdroj: | Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association. 47(9) |
| ISSN: | 1873-6351 |
| Popis: | Due to ever-improving analytical capabilities, very low levels of unexpected chemicals can now be detected in foods. Although these may be toxicologically insignificant, such incidents often garner significant attention. The threshold of toxicological concern (TTC) methodology provides a scientifically defensible, transparent approach for putting low-level exposures in the context of potential risk, as a tool to facilitate prioritization of responses, including potential mitigation. The TTC method supports the establishment of tiered, health-protective exposure limits for chemicals lacking a full toxicity database, based on evaluation of the known toxicity of chemicals which share similar structural characteristics. The approach supports the view that prudent actions towards public health protection are based on evaluation of safety as opposed to detection chemistry. This paper builds on the existing TTC literature and recommends refinements that address two key areas. The first describes the inclusion of genotoxicity data as a way to refine the TTC limit for chemicals that have structural alerts for genotoxicity. The second area addresses duration of exposure. Whereas the existing TTC exposure limits assume a lifetime of exposure, human exposure to unintended chemicals in food is often only for a limited time. Recommendations are made to refine the approach for less-than-lifetime exposures. |
| Databáze: | OpenAIRE |
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