Sulfonated Azocalix[4]arene: A Universal and Effective Taste-Masking Agent.

Area of Science:

• Pharmaceutical Science
• Supramolecular Chemistry
• Materials Science

Background:

• Many active pharmaceutical ingredients (APIs) possess a bitter taste, negatively impacting patient compliance and therapeutic outcomes.
• Effective taste-masking strategies are essential for developing palatable oral drug formulations.
• The development of universal masking agents capable of addressing diverse bitter drug molecules remains a significant challenge in pharmaceutical research.

Purpose of the Study:

• To introduce and evaluate sulfonated azocalix[4]arene (SAC4A) as a universal supramolecular taste-masking agent for bitter drugs.
• To investigate the binding affinity and taste-masking efficacy of SAC4A across a range of bitter pharmaceutical compounds.
• To assess the biocompatibility of SAC4A for potential oral drug delivery applications.

Main Methods:

• Synthesis and characterization of sulfonated azocalix[4]arene (SAC4A).
• Binding studies to assess the affinity of SAC4A for 16 different bitter drug molecules, including alkaloids, flavonoids, and terpenoids.
• Evaluation of the taste-masking effectiveness of SAC4A in masking the bitterness of these drugs.
• Biocompatibility assessments of SAC4A.

Main Results:

• SAC4A demonstrated a deep cavity structure, facilitating strong hydrophobic interactions and a large binding area for bitter drug molecules.
• High binding affinities were observed between SAC4A and 16 diverse bitter drug compounds.
• The bitter taste of the tested drugs was effectively masked when complexed with SAC4A.
• SAC4A exhibited favorable biocompatibility, indicating its suitability for pharmaceutical applications.

Conclusions:

• Sulfonated azocalix[4]arene (SAC4A) functions as a highly effective and universal supramolecular taste-masking agent.
• The unique structural features of SAC4A enable strong binding and efficient masking of bitterness across various drug classes.
• SAC4A presents a promising solution for improving the palatability of bitter oral medications, thereby enhancing patient compliance and treatment efficacy.