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Development of a rat dosimetry model for bromate.
1University of Georgia, College of Public Health, Department of Environmental Health Science, Environmental Health Science Bldg., Athens, GA 30602, USA. jwfisher@uga.edu
Toxicology
|February 28, 2006
Summary
Bromate, a carcinogen in drinking water, targets kidneys, testes, and thyroid. Its transport via the sodium iodide transporter (NIS) influences toxicity, necessitating a pharmacokinetic model to assess human health risks.
Area of Science:
- Environmental Health
- Toxicology
- Carcinogenesis
Background:
- Bromate is an animal carcinogen found in ozonated drinking water.
- It causes toxicity and cancer in kidneys, testes, and thyroid.
- Metabolism to reactive intermediates may drive bromate's toxicity.
Purpose of the Study:
- To investigate the role of the sodium iodide transporter (NIS) in bromate distribution and dosimetry.
- To propose the development of a physiologically based pharmacokinetic (PBPK) model for bromate.
- To quantify human health risks from low-level bromate exposure in drinking water.
Main Methods:
- Reviewing evidence for NIS-dependent bromate transport.
- Proposing studies to develop a PBPK model for bromate.
- Utilizing existing PBPK models for perchlorate and iodide as templates.
Main Results:
- Evidence suggests bromate and bromide are transported by NIS in target organs.
- This NIS-mediated transport influences bromate's distribution and potential toxicity.
- A PBPK model is proposed to better understand bromate dosimetry.
Conclusions:
- NIS-dependent dosimetry is crucial for interpreting bromate's dose-response effects.
- A PBPK model will enhance understanding of bromate's health risks.
- This research is vital for assessing human health risks from drinking water contamination.