Prodrugs--from serendipity to rational design

Area of Science:

• Medicinal Chemistry
• Pharmacology
• Drug Delivery

Background:

• The prodrug concept, utilizing bioreversible derivatives, has evolved since the late 19th century.
• The term 'prodrug' was coined in the late 1950s, referring to inactive compounds converted to active drugs in vivo.
• Prodrugs are crucial for overcoming drug formulation, delivery, and toxicity limitations.

Purpose of the Study:

• To provide an in-depth review of the prodrug approach in drug development.
• To examine the historical rationale and evolution of prodrug strategies.
• To discuss potential challenges associated with prodrug activation.

Main Methods:

• Literature review of prodrug development and application.
• Analysis of prodrugs approved in the pharmaceutical market.
• Discussion of chemical and enzymatic activation pathways.

Main Results:

• Prodrugs represent approximately 20% of small molecular drugs approved between 2000-2008.
• Numerous prodrugs have successfully addressed formulation, delivery, and toxicity issues.
• Prodrugs can be simple derivatives or involve molecular modifications yielding new active compounds.

Conclusions:

• The prodrug approach offers a viable strategy for enhancing drug properties.
• Careful consideration of activation mechanisms is essential for successful prodrug design.
• Prodrug development, while challenging, significantly improves investigational and marketed drugs.