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Fungal metabolism of 4-substituted amphetamines
B C Foster1, L M Nantais, D L Wilson
1Bureau of Drug Research, Sir Frederick Banting Research Centre, Ottawa, Ontario, Canada.
Abstract:
1. rac.-4-Ethoxyamphetamine was incubated with 14 different yeast and fungal microorganisms. 4-Hydroxyamphetamine was the major metabolite; traces of N-acetyl-4-ethoxyamphetamine were also detected. 2. The major fungal (Cunninghamella) metabolite of 4-propoxyamphetamine and 4-benzyloxyamphetamine was 4-hydroxyamphetamine. The major metabolites of 4-methoxyamphetamine were N-acetyl-4-methoxyamphetamine and 4-hydroxyamphetamine. 3. Acetoin derivatives were formed when alkoxyamphetamine substrates were incubated in the presence of various fungi and yeasts. 4. The findings indicate that Cunninghamella echinulata may be a useful microbial model for drug disposition and interaction studies.
Insights
This study explored how fungi metabolize alkoxyamphetamines. Cunninghamella echinulata efficiently transformed these compounds, producing 4-hydroxyamphetamine and acetoin derivatives, suggesting its utility in drug metabolism research.
Area of Science:
- Microbiology
- Pharmacology
- Drug Metabolism
Background:
- Alkoxyamphetamines are a class of psychoactive compounds.
- Understanding their metabolic pathways is crucial for drug disposition and interaction studies.
- Microbial models offer a scalable approach to studying xenobiotic metabolism.
Purpose of the Study:
- To investigate the metabolic fate of various alkoxyamphetamines using different yeast and fungal microorganisms.
- To identify the major metabolites produced by microbial biotransformation.
- To evaluate the potential of specific fungi, like Cunninghamella echinulata, as models for drug metabolism studies.
Main Methods:
- Incubation of rac.-4-ethoxyamphetamine, 4-propoxyamphetamine, 4-benzyloxyamphetamine, and 4-methoxyamphetamine with 14 different yeast and fungal strains.
- Identification of major metabolites using analytical techniques.
- Assessment of acetoin derivative formation.
Main Results:
- 4-Hydroxyamphetamine was the primary metabolite of rac.-4-ethoxyamphetamine, with N-acetyl-4-ethoxyamphetamine detected in trace amounts.
- 4-Hydroxyamphetamine was also the major fungal metabolite for 4-propoxyamphetamine and 4-benzyloxyamphetamine.
- N-Acetyl-4-methoxyamphetamine and 4-hydroxyamphetamine were major metabolites of 4-methoxyamphetamine.
- Acetoin derivatives were formed from alkoxyamphetamine substrates incubated with fungi and yeasts.
Conclusions:
- Cunninghamella echinulata demonstrated significant metabolic capabilities for alkoxyamphetamines.
- The identified metabolites (4-hydroxyamphetamine, N-acetylated derivatives, acetoin derivatives) provide insights into microbial biotransformation pathways.
- Cunninghamella echinulata shows promise as a microbial model for drug disposition and interaction studies.