Microstructured Polymeric Fabrics Modulating the Paracrine Activity of Adipose-Derived Stem Cells

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Stem cell deposition aids tissue repair and angiogenesis but faces challenges with cell engraftment and survival.
• Novel biodegradable scaffolds are needed to improve stem cell integration and therapeutic outcomes.

Purpose of the Study:

• To investigate poly(lactic-co-glycolic acid) (PLGA) microstructured fabrics as scaffolds for human adipose-derived stem cell (hADSC) tissue integration.
• To compare hADSC behavior and secretome on PLGA scaffolds versus conventional substrates.

Main Methods:

• Fabrication of PLGA microstructured fabrics with varying filament sizes and pitch distances using soft lithography.
• Seeding of hADSCs onto PLGA fabrics and conventional substrates (e.g., collagen).
• Characterization of cell viability, actin cytoskeleton organization, spatial arrangement, and secretome analysis.

Main Results:

• hADSCs on PLGA fabrics formed spheroidal structures, maintained viability, and exhibited nonlinear actin organization.
• PLGA scaffolds enhanced secretion of factors for angiogenesis, extracellular matrix remodeling, and stem cell homing compared to conventional substrates.
• The 5 μm PLGA fabric specifically promoted factors involved in all three key processes, indicating microstructure-dependent paracrine activity.

Conclusions:

• Microstructured PLGA fabrics are promising biodegradable scaffolds for hADSC tissue integration.
• These scaffolds support cell organization and enhance the secretion of therapeutic factors, offering potential for stem cell implantation and angiogenesis induction.
• PLGA fabrics represent a viable alternative to traditional collagen substrates in regenerative medicine applications.