Patent-Based Technological Overview of Propolis-Cyclodextrin Inclusion Complexes with Pharmaceutical Potential

Abstract

Background/objectives: Propolis, known for its medicinal properties, faces challenges in pharmaceutical applications due to its low aqueous solubility, attributed to its resinous and hydrophobic nature. This limits oral administration, reducing its bioavailability and pharmacological activities. To overcome these barriers, cyclodextrins (CDs), cyclic oligosaccharides, are widely studied as carrier systems that enhance the solubility and bioavailability of propolis and other nonpolar compounds. This study aimed to review patents that developed innovative therapeutic approaches to improve the physicochemical and biological properties of propolis through complexation with CDs. Methods: Active and application patents registered over the last 17 years were searched across multiple databases, resulting in the selection of eight inventions for detailed analysis. Results: These patents highlight therapeutic applications of propolis-CD systems for conditions such as diabetes and skin and gastrointestinal cancers, as well as antimicrobial, immunostimulant, and antioxidant effects. Additionally, novel extraction processes free of organic solvents, including nanometric-scale powder extracts, are described. Conclusions: Findings from scientific articles support the patent data, demonstrating that CD complexation significantly enhances the solubility and therapeutic efficacy of propolis. Thus, these patents present an innovative and promising strategy for developing propolis-based pharmaceutical products.

Keywords: cyclodextrins; drug delivery systems; polysaccharides; propolis.

Figure 1

Flowchart of patent searching, filtering, and selection.

Figure 2

Global distribution of filed patents.