Rational Development of Nucleoside Diphosphate Prodrugs: DiPPro-Compounds

Area of Science:

• Medicinal Chemistry
• Drug Delivery
• Virology

Background:

• Nucleoside diphosphates (NDPs) are crucial for cellular processes but difficult to deliver directly.
• Prodrug strategies aim to improve the bioavailability and cellular uptake of therapeutic agents.
• Previous attempts at NDP prodrugs faced challenges in stability and effective delivery.

Purpose of the Study:

• To design and evaluate bio-reversible prodrugs for nucleoside diphosphates (NDPs).
• To assess the hydrolytic stability and antiviral activity of novel NDP prodrugs.
• To develop a successful strategy for delivering active NDPs intracellularly.

Main Methods:

• Synthesis and characterization of β-(bis(acyloxybenzyl) nucleoside diphosphates) (DiPPro) prodrugs.
• Hydrolysis studies in various media: PBS buffer, human plasma, cell culture medium (RPMI-1640), and cell extracts (CEM).
• Evaluation of prodrug stability and release kinetics of parent nucleoside diphosphates.

Main Results:

• The DiPPro approach demonstrated successful delivery of target nucleoside diphosphates.
• Prodrug stability varied based on acyl moieties and nucleoside analogues.
• Prodrugs exhibited high chemical and plasma stability but low half-life in CEM cell extracts, efficiently releasing active NDPs (e.g., AZT, d4T, BVDU).
• Two other prodrug types (cycloSal-NDP) were ineffective.

Conclusions:

• A new series of non-symmetric nucleoside diphosphate prodrugs was developed.
• These prodrugs selectively deliver nucleoside diphosphates within cell extracts.
• The DiPPro strategy represents a significant advancement in NDP prodrug design for potential therapeutic applications.