Format

Send to:

Choose Destination
See comment in PubMed Commons below
Peptides. 2009 Aug;30(8):1539-47. doi: 10.1016/j.peptides.2009.05.010. Epub 2009 May 22.

Identification of a novel dual E- and N-cadherin antagonist.

Author information

  • 1Division of Urology, Department of Surgery, McGill University, Urology Research Laboratories, Royal Victoria Hospital, Room H6.15, 687 Pine Avenue West, Montreal, Quebec, Canada H3A 1A1. emmanuelle.devemy@mcgill.ca

Abstract

E- and N-cadherin are related calcium-dependent cell adhesion molecules that exert an influence over multiple biological and disease processes. Antagonists of these cadherins can therefore be envisaged as therapeutically useful drugs. We have used phage display technology to discover such antagonists. A peptide phage library was screened against a chimeric protein composed of the human E-cadherin ectodomain fused to the Fc fragment of human immunoglobulin G1 (E-cad/Fc). All of the phage clones that were isolated also bound a chimeric protein composed of the human N-cadherin ectodomain fused to the Fc fragment of human immunoglobulin G1 (N-cad/Fc). A peptide displayed by several of the isolated phage clones was synthesized (H-SWELYYPLRANL-NH2) and found to bind both E- and N-cad/Fc chimeric proteins with affinities (K(D)) of 9.4 microM and 323 nM, respectively, as judged by surface plasmon resonance spectroscopy. This peptide was also capable of blocking the aggregation of E- and N-cad/Fc chimeric protein-coated beads, as well as the aggregation of MCF-7 and MDA-MB435 human breast cancer cells (these cells express E- and N-cadherin, respectively). Finally, we showed that the peptide disrupted MCF-7 and MDA-MB435 cell monolayers. The peptide, H-SWELYYPLRANL-NH(2) thus proved to be a biologically active, dual E- and N-cadherin antagonist. Such an antagonist has application in a wide variety of biological contexts.

PMID:
19465078
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk