Design and activity of multifunctional fibrils using receptor-specific small peptides

Biomaterials. 2009 Dec;30(35):6731-8. doi: 10.1016/j.biomaterials.2009.08.044. Epub 2009 Sep 18.

Abstract

We have designed multifunctional peptide fibrils using bioactive laminin-derived peptides and evaluated their potential as a biomedical material for tissue engineering. The Leu-Arg-Gly-Asp-Asn (LRGDN) peptide derived from laminin-111, which contains an RGD sequence bound to integrin alphavbeta3, was added to the N-terminus of the four amyloidogenic cell-adhesive laminin-derived peptides (A119: LSNIDYILIKAS, AG97: SAKVDAIGLEIV, B133: DISTKYFQMSLE, and B160: VILQQSAADIAR). The RGD-conjugated peptides were stained with Congo red and exhibited amyloid-like fibril formation in the electron microscopic. The RGD-conjugated peptides promoted human dermal fibroblasts spreading with well-organized actin stress fibers and focal contacts. Human dermal fibroblast attachment to the RGD-conjugated peptides was inhibited by anti-alphav integrin antibody. Further, cell attachment to B133 was inhibited by anti-alpha2 and anti-beta1 integrin antibodies, whereas attachment to RGD-B133 was inhibited by anti-alphav and anti-beta1 integrin antibodies. These results suggest that the RGD-conjugated peptides interact with integrin alphavbeta3 and that RGD-B133 interacts with both integrin alphavbeta3 and integrin beta1. The RGD-conjugated peptide fibrils promoted neurite outgrowth in a peptide-dependent manner. These results support that biologically active sequence-conjugated peptide fibrils interact in a receptor-specific manner with cells and promote multifunctional activities. These fibrils may have use as biological supports for cell-specific tissue engineering.

Publication types

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

MeSH terms

  • Actins / metabolism
  • Amino Acid Sequence
  • Amyloid / metabolism*
  • Amyloid / ultrastructure
  • Animals
  • Cell Adhesion / physiology
  • Cell Line, Tumor
  • Cells, Cultured
  • Coloring Agents / metabolism
  • Congo Red / metabolism
  • Fibroblasts / cytology
  • Humans
  • Infant, Newborn
  • Integrin alphaVbeta3 / metabolism
  • Integrin beta1 / metabolism
  • Laminin / chemistry
  • Oligopeptides / chemical synthesis*
  • Oligopeptides / chemistry
  • Oligopeptides / metabolism*
  • PC12 Cells
  • Rats
  • Skin / cytology

Substances

  • Actins
  • Amyloid
  • Coloring Agents
  • Integrin alphaVbeta3
  • Integrin beta1
  • Laminin
  • Oligopeptides
  • RGDN peptide
  • Congo Red
  • arginyl-glycyl-aspartic acid