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Decrease by psychotropic drugs and local anaesthetics of membrane fluidity measured by fluorescence anisotropy in
The Journal of Pharmacy and Pharmacology
|December 1, 1992
Summary
Psychotropic drugs and local anesthetics were studied for their effects on bacterial cell membranes. These compounds were found to decrease membrane fluidity in Escherichia coli, impacting cell function.
Area of Science:
- Microbiology
- Biochemistry
- Pharmacology
Background:
- Cell membrane fluidity is crucial for bacterial function.
- Psychotropic drugs and local anesthetics can interact with biological membranes.
Purpose of the Study:
- To investigate the impact of psychotropic drugs and local anesthetics on the fluidity of Escherichia coli cell membranes.
- To determine if these compounds alter membrane structure and function.
Main Methods:
- Utilized 1,6-diphenyl-1,3,5-hexatriene (DPH) fluorescence anisotropy to measure membrane fluidity.
- Exposed Escherichia coli cell membranes to various psychotropic drugs and local anesthetics.
- Assessed changes in fluorescence anisotropy at different temperatures.
Main Results:
- Chlorpromazine significantly increased DPH fluorescence anisotropy, indicating decreased membrane fluidity, especially above 24°C.
- Dibucaine, lignocaine, imipramine, tetracaine, and procaine also increased fluorescence anisotropy.
- All tested psychotropic drugs and local anesthetics reduced Escherichia coli cell membrane fluidity.
Conclusions:
- Psychotropic drugs and local anesthetics disrupt the fluidity of bacterial cell membranes.
- This alteration in membrane fluidity may affect the efficacy and side effects of these drugs.
- Further research is needed to understand the clinical implications of these findings.