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Synthesis and stability study of a modified phenylpropionic acid linker-based esterase-sensitive prodrug
Xiaoping Song1, Teruna J Siahaan
1Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, KS 66047, USA.
Bioorganic & Medicinal Chemistry Letters
|November 7, 2002
Summary
This study synthesized an esterase-sensitive prodrug. The prodrug converts to the active drug via esterase enzymes, a process inhibited by paraoxon.
Area of Science:
- Medicinal Chemistry
- Biochemistry
- Drug Delivery
Background:
- Prodrugs enhance drug efficacy and reduce toxicity.
- Esterase-mediated activation is a common prodrug strategy.
- Developing novel prodrugs with controlled activation is crucial.
Purpose of the Study:
- To synthesize and characterize a novel esterase-sensitive amide prodrug (1) with a modified phenylpropionic acid linker.
- To investigate the enzymatic conversion of prodrug 1 to its active drug form.
- To evaluate the role of esterase inhibition on prodrug activation.
Main Methods:
- Synthesis of esterase-sensitive amide prodrug 1.
- Enzymatic conversion assays using isolated porcine esterase and human plasma.
- Inhibition studies using paraoxon, an esterase inhibitor.
- Identification of reaction intermediates and final products (lactone 2 and the drug).
Main Results:
- Prodrug 1 was successfully synthesized.
- Prodrug 1 was converted to the active drug in the presence of porcine esterase and human plasma.
- Paraoxon effectively inhibited the prodrug-to-drug conversion.
- The conversion pathway involved a phenol intermediate (9), leading to lactone 2 and the drug.
Conclusions:
- The synthesized prodrug 1 demonstrates esterase-dependent activation.
- This prodrug strategy holds potential for controlled drug release.
- Further studies are warranted to explore its therapeutic applications.