Peptide aptamers against titanium-based implants identified through phage display

J Mater Sci Mater Med. 2010 Apr;21(4):1103-7. doi: 10.1007/s10856-009-3970-3. Epub 2009 Dec 20.

Abstract

Commercially pure titanium (cp-Ti) is widely used in the field of long-term clinical oral implantology owing to its ability to allow close bone-implant apposition. The optimization of its function based on artificial proteins has become a key issue in the development of improved cp-Ti implants. Here, we set out to identify peptide aptamers with preferential adsorption towards titanium-based implants through the phage display methodology. Fifteen sequences were selected in the third round of biopanning. One sequence, ATWVSPY (named TBP1), had a 40% repetition rate and exhibited the strongest binding affinity to cp-Ti disks. Ten sequences were selected in the fourth round, among which the repetition rate is 80% for TBP1 and 20% for TBP2 (GVGLPHT). The peptide aptamers against cp-Ti disks can provide an alternative method of functional coating for biomaterial surfaces.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Amino Acid Sequence
  • Aptamers, Peptide / isolation & purification*
  • Aptamers, Peptide / metabolism*
  • Aptamers, Peptide / pharmacokinetics
  • Coated Materials, Biocompatible / chemical synthesis
  • Coated Materials, Biocompatible / chemistry
  • Coated Materials, Biocompatible / metabolism
  • Drug Delivery Systems / methods
  • Materials Testing
  • Peptide Library*
  • Prostheses and Implants*
  • Protein Binding
  • Substrate Specificity
  • Surface Properties
  • Tissue Scaffolds / chemistry
  • Titanium / chemistry
  • Titanium / metabolism*

Substances

  • Aptamers, Peptide
  • Coated Materials, Biocompatible
  • Peptide Library
  • Titanium