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Bronchospasmolytic activity and toxicity modelling of theophylline derivatives by a microcomputer based method
O Mekenyan1, G Stoyanova, V Kamenska
1Burgas University of Technology, Bulgaria.
Arzneimittel-Forschung
|December 1, 1993
Summary
Molecular topology, not simple metrics, dictates theophylline derivative activity and toxicity. Specific acceptor properties influence both, but their positions are key to differentiating effects.
Area of Science:
- Medicinal Chemistry
- Computational Chemistry
- Pharmacology
Background:
- Theophylline derivatives are used for their bronchospasmolytic effects.
- Understanding structure-activity relationships is crucial for drug development.
- Predicting toxicity alongside efficacy is essential for safety.
Purpose of the Study:
- To model the bronchospasmolytic activity and toxicity of theophylline derivatives.
- To identify key geometric and electronic factors influencing biological activity.
- To elucidate the role of molecular topology versus compound metrics.
Main Methods:
- Utilized the OASIS (Optimized Approach based on Structural Index Sets) microcomputer system.
- Analyzed molecular topology and electronic properties.
- Correlated structural features with observed activity and toxicity.
Main Results:
- Molecular topology was identified as the primary determinant of theophylline activity.
- A distinct and opposing influence of topology on bronchospasmolytic activity and toxicity was observed.
- Acceptor superdelocalizability indices were implicated in both activity and toxicity, with positional effects being critical.
Conclusions:
- Molecular topology is a more significant predictor of theophylline derivative activity than traditional compound metrics.
- The study highlights the differential impact of molecular structure on therapeutic effects and adverse reactions.
- Targeting specific positional acceptor properties could optimize the therapeutic index of theophylline derivatives.