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Al and Si: their speciation, distribution, and toxicity
G F van Landeghem1, M E de Broe, P C D'Haese
1Department of Nephrology, University of Antwerp, Belgium.
Clinical Biochemistry
|August 29, 1998
Summary
Aluminum (AI) and silicon (Si) can accumulate in dialysis patients. This review explores AI and Si speciation, protein binding, and their roles in dialysis-related diseases, proposing a model for AI tissue distribution.
Area of Science:
- Trace element analysis in biological systems
- Biochemistry of dialysis-related diseases
- Toxicology of aluminum and silicon
Background:
- Dialysis patients accumulate aluminum (AI) and silicon (Si).
- AI toxicity is known, but Si's role in dialysis diseases is unclear.
- Understanding trace element speciation is crucial for toxicity/essentiality mechanisms.
Purpose of the Study:
- Review speciation techniques for AI and Si in biological fluids.
- Investigate factors influencing AI and Si speciation, distribution, and toxicity.
- Propose a model for AI tissue distribution and toxicity.
Main Methods:
- Discussion of speciation techniques for AI and Si.
- Analysis of analytical pitfalls: contamination, non-specific binding, equipment interactions.
- Linking experimental speciation data with in vivo tissue distribution and toxicity data.
Main Results:
- Identified common pitfalls in AI and Si speciation studies.
- Highlighted factors affecting AI and Si speciation and tissue distribution.
- Proposed a model for AI tissue distribution and toxicity.
Conclusions:
- A model for AI tissue distribution and toxicity mediated by citrate or transferrin binding is proposed.
- Further research is needed to clarify Si's role in dialysis-related diseases.
- Accurate speciation analysis is critical for understanding AI and Si toxicity.