PLGA Microspheres Incorporated Gelatin Scaffold: Microspheres Modulate Scaffold Properties

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Polymer Chemistry

Background:

• Freeze-drying is a common method for creating polymer scaffolds.
• Poly(lactide-co-glycolide) (PLGA) microspheres are often incorporated into these scaffolds.
• The impact of PLGA microsphere incorporation on scaffold properties and biological interactions is not well understood.

Purpose of the Study:

• To investigate the effect of PLGA microsphere incorporation on the physical properties of freeze-dried gelatin scaffolds.
• To evaluate the influence of PLGA microspheres on the cytocompatibility of gelatin scaffolds.
• To determine the optimal loading concentration of PLGA microspheres for scaffold fabrication.

Main Methods:

• Fabrication of gelatin scaffolds with varying PLGA microsphere concentrations (0.1%, 1%, 10% w/w).
• Characterization of scaffold microarchitecture, swelling, porosity, and mechanical properties.
• Assessment of scaffold biodegradation, cell adhesion, and cell proliferation (cytocompatibility).

Main Results:

• Increased PLGA microsphere loading reduced pore size and uniformity.
• PLGA microsphere incorporation up to 1% w/w significantly enhanced scaffold porosity, swelling, and mechanical strength.
• PLGA microspheres did not significantly affect cell adhesion but influenced cell proliferation kinetics.

Conclusions:

• PLGA microsphere incorporation can modulate the physical and mechanical properties of gelatin scaffolds.
• The concentration of PLGA microspheres is critical for achieving desired scaffold characteristics.
• PLGA microspheres show potential for use in tissue engineering scaffolds, with careful consideration of loading levels for optimal biological performance.