In vitro biocompatibility of different polyester membranes

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Polymer Chemistry

Background:

• Synthetic biodegradable polymers offer advantages over natural materials for tissue engineering due to better biocompatibility and availability.
• Aliphatic polyesters are widely used in biomedical applications, including tissue regeneration.

Purpose of the Study:

• To evaluate the biocompatibility and surface morphology of selected synthetic biodegradable polymers for tissue engineering applications.
• To assess the potential of poly(L-lactic) acid (PLLA), poly(DL-lactic) acid (PDLA), poly-epsilon-caprolactone (PCL), and poly(L-lactic)-co-caprolactone (PLCL) membranes for supporting human fibroblast proliferation.

Main Methods:

• Membranes of PLLA, PDLA, PCL, and PLCL were fabricated using solvent casting.
• Membrane surface morphology was characterized using atomic force microscopy.
• In vitro biocompatibility was assessed by seeding human fibroblasts (CRL 2703) and evaluating proliferation over 28 days using the Alamar blue test.

Main Results:

• Membrane roughness varied from 4 nm (PDLA) to 120 nm, with PCL exhibiting a distinct macroscopic structure due to hydrophobicity.
• Human fibroblasts successfully proliferated on all tested polymer membranes for 28 days.
• The results indicate no in vitro toxicity associated with the materials or the solvent casting processing method.

Conclusions:

• The evaluated synthetic biodegradable polymers (PLLA, PDLA, PCL, PLCL) demonstrate good biocompatibility for tissue engineering applications.
• The solvent casting method is suitable for fabricating membranes that support cell growth.
• Future work will focus on developing 3D scaffolds and surface treatments to enhance cell adhesion for advanced tissue engineering applications.