Nanostructure Formation in Glycerolipid Films during Enzymatic Hydrolysis: A GISAXS Study

Area of Science:

• Materials Science
• Biotechnology
• Food Science

Background:

• Nanostructured lipid films from food-grade lipids are promising for various applications.
• Enzyme-responsive liquid crystalline structures can be used for drug delivery and biosensors.
• Understanding structural changes during enzymatic reactions is crucial for development.

Purpose of the Study:

• To investigate the structural changes in mesostructured lipid films upon digestion with pancreatic lipase.
• To explore the influence of lipid composition on film structure and enzyme response.
• To understand the self-assembly and orientation of lipids in thin films.

Main Methods:

• Preparation of mesostructured lipid films from glycerol monooleate (GMO) and triolein on silicon wafers.
• Enzymatic digestion using pancreatic lipase.
• Time-resolved synchrotron grazing incidence small-angle X-ray scattering (GISAXS) for structural analysis.
• Comparison with bulk lipid phases in excess water.

Main Results:

• Lipid film structure could be modulated from oil coatings to inverse hexagonal and cubic phases by varying the GMO/triolein ratio.
• Pancreatic lipase induced swelling and structural transformation within the lipid films.
• Orientation and reorientation of the internal film structure were observed during preparation and digestion.

Conclusions:

• Enzyme-responsive nanostructured lipid films exhibit dynamic structural changes upon lipase digestion.
• Findings provide insights into self-assembly mechanisms in thin films.
• This research guides the development of enzyme-responsive coatings for functional surface modification.