Investigation of platelet responses and clotting characteristics of in situ albumin binding surfaces

Sanjukta Guha Thakurta, Robert Miller, Anuradha Subramanian

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

The response of biomaterial surfaces when exposed to blood is in part dependent upon the nature and composition of the adsorbed layer of proteins. Surfaces passivated with albumin have been shown to reduce platelet adhesion and activation. In an attempt to develop surfaces that can selectively and specifically bind albumin, silicon-based surfaces were functionalized with linear peptides and chemical ligands that displayed an affinity for albumin. Peptide functionalized surfaces were observed to preferentially bind albumin when compared to human immunoglobulin and human fibrinogen, which possess low densities of surface adsorbed platelets. The platelet morphology was noted to be discoid on the peptide modified surface. Both the unmodified control and SCL functionalized surfaces had high densities of surface adhered platelets with spread out morphology. The peptide and SCL functionalized surfaces were noted to have no impact on PTT and PT clotting times, indicating that the extrinsic and intrinsic pathways were unperturbed by the surfaces generated.

Original languageEnglish (US)
Pages (from-to)529-547
Number of pages19
JournalJournal of Biomaterials Applications
Volume26
Issue number5
DOIs
StatePublished - Jan 1 2012

    Fingerprint

Keywords

  • PT
  • PTT
  • TT
  • albumin affinity surface
  • blood compatibility
  • blood-biomaterial interaction
  • hemolysis
  • platelet adhesion

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering

Cite this