Human single chain Fv antibodies and a complementarity determining region-derived peptide binding to amyloid-beta 1-42

Neurobiol Dis. 2004 Oct;17(1):114-21. doi: 10.1016/j.nbd.2004.06.005.

Abstract

A library of phage-displayed human single-chain Fv (scFv) antibodies was selected against the human amyloid-beta peptide (Abeta42). Two new anti-Abeta42 phage-displayed scFvs antibodies were obtained, and the sequences of their V(H) and Vkappa genes were analyzed. A synthetic peptide based on the sequence of Ig heavy chain (V(H)) complementarity-determining region (HCDR3) of the clone with the highest recognition signal was generated and determined to bind to Abeta42 in ELISA. Furthermore, we showed for the first time that an HCDR3-based peptide had neuroprotective potential against Abeta42 neurotoxicity in rat cultured hippocampal neurons. Our results suggest that not only scFvs recognizing Abeta42 but also synthetic peptides based on the V(H) CDR3 sequences of these antibodies may be novel potential candidates for small molecule-based Alzheimer's disease (AD) therapy.

Publication types

  • Comparative Study
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amyloid beta-Peptides / pharmacology*
  • Animals
  • Antibodies / analysis
  • Antibodies / metabolism
  • Cells, Cultured
  • Complementarity Determining Regions / analysis
  • Complementarity Determining Regions / metabolism*
  • Humans
  • Immunoglobulin Variable Region / analysis
  • Immunoglobulin Variable Region / metabolism*
  • Peptide Fragments / pharmacology*
  • Protein Binding / physiology
  • Rats
  • Rats, Wistar

Substances

  • Amyloid beta-Peptides
  • Antibodies
  • Complementarity Determining Regions
  • Immunoglobulin Variable Region
  • Peptide Fragments
  • amyloid beta-protein (1-42)