Electrospun elastin-like polypeptide enriched polyurethanes and their interactions with vascular smooth muscle cells

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Elastin is crucial for vascular tissue biomechanics and signaling.
• Native elastin's insolubility limits its use in vascular scaffolds.
• Recombinant elastin-like polypeptide-4 (ELP4) offers a soluble alternative mimicking native elastin.

Purpose of the Study:

• To fabricate and evaluate ELP4 surface-modified scaffolds for vascular tissue engineering.
• To assess the impact of ELP4 modification on smooth muscle cell (SMC) behavior.
• To investigate the mechanism of SMC interaction with ELP4 modified surfaces.

Main Methods:

• Electrospinning to create fibrous scaffolds.
• Surface modification of scaffolds with ELP4.
• Culturing smooth muscle cells on modified and control scaffolds.
• Assessing cell adhesion, proliferation, morphology, and phenotype markers.

Main Results:

• ELP4 surface modification enhanced SMC adhesion and cell number maintenance.
• SMCs on ELP4 scaffolds exhibited contractile phenotype markers (spindle morphology, actin organization, MYH11 expression).
• Elastin-laminin receptor interaction with VGVAPG sequence mediated initial SMC contact.

Conclusions:

• ELP4 surface modification is a viable strategy for vascular tissue engineering scaffolds.
• ELP4 promotes SMC adhesion, proliferation, and maintenance of contractile phenotype.
• The findings highlight ELP4's potential for developing functional vascular grafts.