Localized delivery of dexamethasone from electrospun fibers reduces the foreign body response

Biomacromolecules. 2012 Oct 8;13(10):3031-8. doi: 10.1021/bm300520u. Epub 2012 Sep 11.

Abstract

Synthetic scaffolds are crucial to applications in regenerative medicine; however, the foreign body response can impede regeneration and may lead to failure of the implant. Herein we report the development of a tissue engineering scaffold that allows attachment and proliferation of regenerating cells while reducing the foreign body response by localized delivery of an anti-inflammatory agent. Electrospun fibers composed of poly(l-lactic) acid (PLLA) and poly(ε-caprolactone) (PCL) were prepared with and without the steroid anti-inflammatory drug, dexamethasone. Analysis of subcutaneous implants demonstrated that the PLLA fibers encapsulating dexamethasone evoked a less severe inflammatory response than the other fibers examined. They also displayed a controlled release of dexamethasone over a period of time conducive to tissue regeneration and allowed human mesenchymal stem cells to adhere to and proliferate on them in vitro. These observations demonstrate their potential as a building block for tissue engineering scaffolds.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Anti-Inflammatory Agents / administration & dosage*
  • Anti-Inflammatory Agents / pharmacology*
  • Anti-Inflammatory Agents / therapeutic use
  • Biocompatible Materials / chemical synthesis
  • Biocompatible Materials / chemistry*
  • Cell Adhesion
  • Cell Proliferation
  • Cell Survival
  • Dexamethasone / administration & dosage*
  • Dexamethasone / pharmacology*
  • Dexamethasone / therapeutic use
  • Foreign-Body Reaction / drug therapy
  • Foreign-Body Reaction / prevention & control*
  • Humans
  • Lactic Acid / chemistry
  • Mesenchymal Stem Cells / cytology*
  • Mesenchymal Stem Cells / drug effects
  • Particle Size
  • Polyesters / chemistry
  • Polymers / chemistry
  • Surface Properties
  • Temperature
  • Tissue Engineering / methods

Substances

  • Anti-Inflammatory Agents
  • Biocompatible Materials
  • Polyesters
  • Polymers
  • polycaprolactone
  • Lactic Acid
  • poly(lactide)
  • Dexamethasone