An enzymatically controlled mucoadhesive system for enhancing flavour during food oral processing

Area of Science:

• Food Science
• Biopolymer Chemistry
• Oral Drug Delivery

Background:

• Mucoadhesive biopolymers require both adhesion and controlled release properties for effective oral applications.
• Flavor science faces challenges in retaining and releasing aroma/taste compounds within the oral cavity before ingestion.
• Pullulan's partial digestion by salivary alpha-amylase suggests potential for controlled release systems.

Purpose of the Study:

• To investigate pullulan's potential as a controlled release system for oral flavors.
• To develop and characterize a mucoadhesive pullulan analogue for enhanced flavor retention.
• To assess the impact of pullulan degradation on the bioavailability of aroma and salt compounds.

Main Methods:

• Oral processing simulations were used to study the release kinetics of flavor compounds.
• Synthesis of a cationic pullulan analogue, dimethylaminoethyl pullulan (DMAE-pullulan).
• Binding studies of DMAE-pullulan with submaxillary mucin and assessment of its susceptibility to alpha-amylase hydrolysis.

Main Results:

• Pullulan's partial digestion by salivary alpha-amylase facilitates controlled release of flavor compounds.
• Oral processing simulations showed increased bioavailability of aroma and salt with pullulan degradation.
• DMAE-pullulan demonstrated binding to mucin while remaining susceptible to alpha-amylase digestion.

Conclusions:

• Modified pullulan (DMAE-pullulan) shows promise for mucoadhesive applications in the oral cavity, improving flavor retention.
• The enzyme-triggered degradation of pullulan offers a mechanism for controlled flavor release.
• Further development of food-grade, sustainable pullulan derivatives is recommended for next-generation oral mucoadhesives.