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Detection of Endotoxin in Nano-formulations Using Limulus Amoebocyte Lysate (LAL) Assays
Published on: January 30, 2019
Endotoxin contamination of engineered nanomaterials
R Keith Esch1, Li Han, Karin K Foarde
1Research Triangle Institute International, 3040 Cornwallis Road, Research Triangle Park, NC 27709, USA.
Nanotoxicology
|August 28, 2010
Summary
Endotoxin contamination in engineered nanomaterials (ENM) can confound toxicity studies. Our research characterized endotoxin levels in carbon-based ENM, finding it may be randomly introduced during manufacture.
Area of Science:
- Nanomaterial safety
- Toxicology
- Biochemistry
Background:
- Endotoxins are known to cause adverse health effects.
- Endotoxin contamination can act as a confounding factor in toxicity assessments of engineered nanomaterials (ENM).
- Accurate quantification of endotoxin associated with ENM is challenging due to their unique properties.
Purpose of the Study:
- To characterize endotoxin contamination in a selection of carbon-based ENM.
- To investigate the challenges in measuring endotoxin associated with ENM.
- To explore the potential impact of endotoxin on ENM toxicity.
Main Methods:
- Development and implementation of methods for ENM analysis.
- Quantification of endotoxin content in various carbon-based ENM.
- Assessment of the relationship between ENM characteristics and endotoxin levels.
Main Results:
- Varying levels of endotoxin contamination were detected across the examined ENM.
- Endotoxin levels did not correlate with ENM type or surface area in this study.
- Findings suggest endotoxin may be introduced randomly during the manufacturing process.
Conclusions:
- Contaminating endotoxin may contribute to the observed toxicity of ENM.
- Further research is needed to fully understand the ENM-endotoxin interaction.
- Standardized methods for endotoxin quantification in ENM are crucial for accurate toxicity assessment.
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