Examination of the inflammatory response following implantation of titanium plates coated with phospholipids in rats

J Mater Sci Mater Med. 2011 Apr;22(4):1015-26. doi: 10.1007/s10856-011-4287-6. Epub 2011 Apr 1.

Abstract

Implantation of biomaterials like titanium (Ti) causes inflammatory reactions possibly affecting implant functionality. Surface modifications could improve biocompatibility and functionality of implants. Biomembrane-derived phospholipids might be useful as implant coating due to their biomimetic properties. In vitro studies demonstrated beneficial effects for 2-oleoyl-1-palmitoyl-sn-glycero-3-phosphoethanolamin (POPE) as coating regarding interactions with cells and bacteria. Therefore, this in vivo study aimed at examining local inflammatory reactions after implantation of POPE-coated Ti plates. Ti implants with POPE attached non-covalently or covalent via octadecylphosphonic acid (OPA), with OPA alone and uncoated controls were simultaneously implanted intramuscularly in rats for 7, 14 and 56 days. The peri-implant tissue was quantitatively analyzed by immunohistochemistry for total macrophages, tissue macrophages, T cells, antigen-presenting cells and proliferating cells. Overall, both POPE-coated series were comparable to the controls. Furthermore, no differences were found between POPE coating on a covalently linked OPA monolayer and POPE coating dried from solution. Together with earlier in vitro results, this demonstrates the potential of phospholipids for implant surface modification.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Biocompatible Materials / chemistry
  • Biomimetics
  • Cell Proliferation
  • Humans
  • Immunohistochemistry / methods
  • Inflammation
  • Macrophages / cytology
  • Materials Testing
  • Organophosphonates / chemistry
  • Phosphatidylethanolamines / chemistry
  • Phospholipids / chemistry*
  • Rats
  • Regenerative Medicine / methods
  • Time Factors
  • Titanium / chemistry*

Substances

  • Biocompatible Materials
  • Organophosphonates
  • Phosphatidylethanolamines
  • Phospholipids
  • 1-palmitoyl-2-oleoylphosphatidylethanolamine
  • Titanium