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Membrane lipid changes in organic solvent tolerant neural cells
Archives of Toxicology. Supplement. = Archiv Fur Toxikologie. Supplement
|January 1, 1986
Summary
Chronic exposure to organic solvents like trichloroethylene (TCE) and perchloroethylene (PCE) alters neural membrane fatty acids in ethanolaminephosphoglyceride (EPG). These changes may help membranes adapt to solvent-induced volume increases.
Area of Science:
- Neuroscience
- Toxicology
- Biochemistry
Background:
- Organic solvents are known for acute anesthetic effects but chronic neural impacts are poorly understood.
- Chlorinated solvents like TCE and PCE are common environmental contaminants.
Purpose of the Study:
- To investigate chronic effects of TCE and PCE on neural membrane lipid composition.
- To identify specific changes in fatty acid profiles after solvent exposure.
Main Methods:
- Animals were exposed to TCE and PCE in inhalation chambers.
- Lipid class composition and fatty acid profiles of neural membranes were analyzed.
- Control groups were maintained under identical conditions.
Main Results:
- Minor changes in overall lipid class composition were observed.
- A trend towards decreased cholesterol to phospholipid ratio was noted.
- Significant alterations in ethanolaminephosphoglyceride (EPG) fatty acid proportions occurred, with increased linoleic acid and decreased linolenic acid derivatives.
Conclusions:
- Chronic exposure to TCE and PCE modifies neural membrane fatty acid composition, particularly in EPG.
- These alterations may represent a compensatory mechanism for increased membrane hydrophobicity.
- Solvent-induced interference with desaturase enzymes is a potential cause for altered fatty acid profiles.