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Related Experiment Videos

Protection against Abeta-induced memory loss by tripeptide D-Arg-L-Glu-L-Arg.

Radmila Mileusnic1, Christine Lancashire, Jonathan Clark

  • 1Department of Biological Sciences, the Open University, Milton Keynes, UK. r.mileusnic@open.ac.uk

Behavioural Pharmacology
|April 12, 2007
PubMed
Summary
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A novel acetylated tripeptide, RER, derived from amyloid precursor protein, shows promise in protecting against Alzheimer's-related memory loss. This peptide readily crosses the blood-brain barrier and may offer a therapeutic avenue for early-stage Alzheimer's disease.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Pharmacology

Background:

  • Alzheimer's disease (AD) is characterized by memory deficits linked to amyloid precursor protein (APP) processing.
  • Previous research indicated the tripeptide RER (NH2-D-Arg-L-Glu-L-Arg-COOH) can rescue memory in animal models.

Purpose of the Study:

  • To investigate the efficacy of the diastereomeric (D/L) acetylated tripeptide RER in preventing Abeta-induced memory loss.
  • To assess the potential of RER as a therapeutic agent for early-stage Alzheimer's disease.

Main Methods:

  • Utilized young chicks for a passive avoidance memory task.
  • Administered acetylated tripeptide RER peripherally up to 12 hours before training.
  • Evaluated memory protection and retention enhancement.

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Main Results:

  • The acetylated RER tripeptide demonstrated protection against Abeta-induced memory loss.
  • Enhanced memory retention was observed for a weak version of the task.
  • The tripeptide effectively crossed the blood-brain barrier and bound to brain receptor sites without adverse behavioral effects.

Conclusions:

  • The RER tripeptide, particularly its D/L acetylated form, shows therapeutic potential for Alzheimer's disease.
  • Peptides containing D-amino acids, like RER, are important for cognitive function.
  • RER-related peptides could form the basis of novel treatments for early-stage Alzheimer's.