Topologically controlled hyaluronan-based gel coatings of hydrophobic grid-like scaffolds to modulate drug delivery

Colloids Surf B Biointerfaces. 2016 Apr 1:140:412-420. doi: 10.1016/j.colsurfb.2016.01.004. Epub 2016 Jan 6.

Abstract

Scaffolds based on poly(ethyl acrylate) having interwoven channels were coated with a hyaluronan (HA) hydrogel to be used in tissue engineering applications. Controlled typologies of coatings evolving from isolated aggregates to continuous layers, which eventually clog the channels, were obtained by using hyaluronan solutions of different concentrations. The efficiency of the HA loading was determined using gravimetric and thermogravimetric methods, and the hydrogel loss during the subsequent crosslinking process was quantified, seeming to depend on the mass fraction of hyaluronan initially incorporated to the pores. The effect of the topologically different coatings on the scaffolds, in terms of mechanical properties and swelling at equilibrium under different conditions was evaluated and correlated with the hyaluronan mass fraction. The potential of these hydrogel coatings as vehicle for controlled drug release from the scaffolds was validated using a protein model.

Keywords: Controlled release; Hyaluronan; Hydrogel coating; Poly(ethyl acrylate); Scaffold.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrylic Resins / chemistry
  • Animals
  • Cattle
  • Coated Materials, Biocompatible / administration & dosage
  • Coated Materials, Biocompatible / chemistry*
  • Coated Materials, Biocompatible / pharmacokinetics
  • Delayed-Action Preparations / administration & dosage
  • Delayed-Action Preparations / chemistry*
  • Delayed-Action Preparations / pharmacokinetics
  • Drug Delivery Systems / methods
  • Drug Liberation
  • Hyaluronic Acid / chemistry*
  • Hydrogel, Polyethylene Glycol Dimethacrylate*
  • Hydrophobic and Hydrophilic Interactions
  • Serum Albumin, Bovine / administration & dosage
  • Serum Albumin, Bovine / chemistry
  • Serum Albumin, Bovine / pharmacokinetics
  • Thermogravimetry
  • Tissue Engineering / methods
  • Tissue Scaffolds / chemistry*

Substances

  • Acrylic Resins
  • Coated Materials, Biocompatible
  • Delayed-Action Preparations
  • poly(ethylacrylate)
  • Hydrogel, Polyethylene Glycol Dimethacrylate
  • Serum Albumin, Bovine
  • Hyaluronic Acid