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Researchers developed novel pectin-polyhydroxybutyrate (pec-PHB) nanofibers. These biocompatible materials show promise as scaffolds for retinal tissue engineering, supporting cell growth and proliferation.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Tissue Engineering

Background:

  • Natural polysaccharides like pectin offer unique properties for biomaterial development.
  • Polyhydroxybutyrate (PHB) is a biodegradable polyester with potential in biomedical applications.
  • Developing novel copolymers can enhance the properties of existing biomaterials.

Purpose of the Study:

  • To synthesize and characterize a novel pectin-polyhydroxybutyrate (pec-PHB) copolymer.
  • To fabricate and evaluate PHB/pec-PHB blend nanofibers for potential use as retinal tissue engineering scaffolds.
  • To assess the physical, mechanical, and biological properties of the developed nanofibers.

Main Methods:

  • Grafting of pectin with polyhydroxybutyrate (PHB) via ring-opening polymerization of β-butyrolactone.
  • Blending of pec-PHB with PHB in various proportions.
  • Electrospinning of PHB/pec-PHB blends to produce nanofibers.
  • Characterization of nanofiber morphology, diameter, water contact angle, and mechanical properties (elongation at break).
  • In vitro cytotoxicity and biocompatibility assessment using human retinal pigmented epithelium (ARPE-19) cells.

Main Results:

  • Uniform, bead-free nanofibers of PHB/pec-PHB blends were successfully produced, indicating miscibility.
  • Incorporation of pec-PHB reduced nanofiber diameter and water contact angle.
  • Elongation at break significantly increased (39-335%) in pec-PHB containing nanofibers compared to pristine PHB.
  • pec-PHB nanofibers demonstrated non-cytotoxicity and biocompatibility.
  • ARPE-19 cells showed good proliferation on PHB and pec-PHB nanofibers, with higher cell densities on pec-PHB rich scaffolds.

Conclusions:

  • Pectin-grafted PHB (pec-PHB) is a novel, biocompatible material.
  • PHB/pec-PHB blend nanofibers possess favorable physical and mechanical properties for tissue engineering.
  • These nanofibers support the proliferation of retinal pigment epithelium cells.
  • pec-PHB nanofibers show significant potential as scaffolds for retinal tissue engineering applications.