A monoclonal antibody against acetylcholinesterase inhibits the formation of amyloid fibrils induced by the enzyme

Ariel E. Reyes, Daniel R. Perez, Alejandra Alvarez, Jorge Garrido, Mary K. Gentry, Bhupendra P. Doctor, Nibaldo C. Inestrosa

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)

Abstract

A monoclonal antibody (mAb) 25B1 directed against fetal bovine serum acetylcholinesterase (FBS AChE) was used to examine the ability of the cholinergic enzyme to promote the assembly of amyloid-β peptides (Aβ) into Alzheimers fibrils. This mAb binds to the peripheral anionic site of the enzyme and allosterically inhibits catalytic activity of FBS AChE. Several techniques, including thioflavine-T fluorescence, turbidity, and negative-staining at the electron microscopy level, were used to assess amyloid formation. Inhibition of amyloid formation was dependent on the molar ratio AChE:mAb 25B1, and at least 50% of the inhibition of the AChE promoting effect occurs at a molar ratio similar to that required for inhibition of the esterase activity. Our results suggest that mAb 25B1 inhibits the promotion of the amyloid fibril formation triggered by AChE by affecting the lag period of the Aβ aggregation process.

Original languageEnglish
Pages (from-to)652-655
Number of pages4
JournalBiochemical and Biophysical Research Communications
Volume232
Issue number3
DOIs
Publication statusPublished - 27 Mar 1997

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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