Effects of an exogenous β-amyloid peptide on retention for spatial learning

Michael Mcdonald, Eric E. Dahl, J. Bruce Overmier, Patrick Mantyh, James Cleary

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Three experiments assessed the effects of β-amyloid 1-40 (βA4) on spatial learning in Sprague-Dawley rats. In Experiment 1, rats were trained on a signaled footshock avoidance in a Y-maze. Rats received a single injection of βA4 or vehicle in both sides of the hippocampus immediately after the fifth trial. The βA4 group took significantly longer than the vehicle group to learn to avoid the shock when trained to criterion 1 week later, suggesting a detrimental effect of βA4 on memory consolidation. Experiment 2 used a food reinforcer rather than shock relief under procedures similar to Experiment 1. Again, the βA4 group took longer to learn the maze to criterion. This shows that the effect in Experiment 1 was not specific to shock-maintained learning. In Experiment 3, rats were trained to retrieve a food pellet from each arm of an eight-arm radial maze. After training to criterion, β4 or vehicle was administered intrahippocampally 30 min before the daily session for 26 sessions. There were no acute or chronic effects of βA4 injection on radial maze performance, and no aggregation of βA4 or significant necrosis was observed upon postmortem histological analysis. These experiments suggest that single injections of βA4 impair memory consolidation, but repeated injections of βA4 over an extended period do not affect well-learned behavior.

Original languageEnglish (US)
Pages (from-to)60-67
Number of pages8
JournalBehavioral and Neural Biology
Volume62
Issue number1
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

Fingerprint

Amyloid
Peptides
Shock
Injections
Spatial Learning
Retention (Psychology)
Food
Sprague Dawley Rats
Hippocampus
Necrosis
Learning

All Science Journal Classification (ASJC) codes

  • Physiology

Cite this

Effects of an exogenous β-amyloid peptide on retention for spatial learning. / Mcdonald, Michael; Dahl, Eric E.; Overmier, J. Bruce; Mantyh, Patrick; Cleary, James.

In: Behavioral and Neural Biology, Vol. 62, No. 1, 01.01.1994, p. 60-67.

Research output: Contribution to journalArticle

Mcdonald, Michael ; Dahl, Eric E. ; Overmier, J. Bruce ; Mantyh, Patrick ; Cleary, James. / Effects of an exogenous β-amyloid peptide on retention for spatial learning. In: Behavioral and Neural Biology. 1994 ; Vol. 62, No. 1. pp. 60-67.
@article{2218cf600db74967b666d2626f9039ef,
title = "Effects of an exogenous β-amyloid peptide on retention for spatial learning",
abstract = "Three experiments assessed the effects of β-amyloid 1-40 (βA4) on spatial learning in Sprague-Dawley rats. In Experiment 1, rats were trained on a signaled footshock avoidance in a Y-maze. Rats received a single injection of βA4 or vehicle in both sides of the hippocampus immediately after the fifth trial. The βA4 group took significantly longer than the vehicle group to learn to avoid the shock when trained to criterion 1 week later, suggesting a detrimental effect of βA4 on memory consolidation. Experiment 2 used a food reinforcer rather than shock relief under procedures similar to Experiment 1. Again, the βA4 group took longer to learn the maze to criterion. This shows that the effect in Experiment 1 was not specific to shock-maintained learning. In Experiment 3, rats were trained to retrieve a food pellet from each arm of an eight-arm radial maze. After training to criterion, β4 or vehicle was administered intrahippocampally 30 min before the daily session for 26 sessions. There were no acute or chronic effects of βA4 injection on radial maze performance, and no aggregation of βA4 or significant necrosis was observed upon postmortem histological analysis. These experiments suggest that single injections of βA4 impair memory consolidation, but repeated injections of βA4 over an extended period do not affect well-learned behavior.",
author = "Michael Mcdonald and Dahl, {Eric E.} and Overmier, {J. Bruce} and Patrick Mantyh and James Cleary",
year = "1994",
month = "1",
day = "1",
doi = "10.1016/S0163-1047(05)80059-7",
language = "English (US)",
volume = "62",
pages = "60--67",
journal = "Neurobiology of Learning and Memory",
issn = "1074-7427",
publisher = "Academic Press Inc.",
number = "1",

}

TY - JOUR

T1 - Effects of an exogenous β-amyloid peptide on retention for spatial learning

AU - Mcdonald, Michael

AU - Dahl, Eric E.

AU - Overmier, J. Bruce

AU - Mantyh, Patrick

AU - Cleary, James

PY - 1994/1/1

Y1 - 1994/1/1

N2 - Three experiments assessed the effects of β-amyloid 1-40 (βA4) on spatial learning in Sprague-Dawley rats. In Experiment 1, rats were trained on a signaled footshock avoidance in a Y-maze. Rats received a single injection of βA4 or vehicle in both sides of the hippocampus immediately after the fifth trial. The βA4 group took significantly longer than the vehicle group to learn to avoid the shock when trained to criterion 1 week later, suggesting a detrimental effect of βA4 on memory consolidation. Experiment 2 used a food reinforcer rather than shock relief under procedures similar to Experiment 1. Again, the βA4 group took longer to learn the maze to criterion. This shows that the effect in Experiment 1 was not specific to shock-maintained learning. In Experiment 3, rats were trained to retrieve a food pellet from each arm of an eight-arm radial maze. After training to criterion, β4 or vehicle was administered intrahippocampally 30 min before the daily session for 26 sessions. There were no acute or chronic effects of βA4 injection on radial maze performance, and no aggregation of βA4 or significant necrosis was observed upon postmortem histological analysis. These experiments suggest that single injections of βA4 impair memory consolidation, but repeated injections of βA4 over an extended period do not affect well-learned behavior.

AB - Three experiments assessed the effects of β-amyloid 1-40 (βA4) on spatial learning in Sprague-Dawley rats. In Experiment 1, rats were trained on a signaled footshock avoidance in a Y-maze. Rats received a single injection of βA4 or vehicle in both sides of the hippocampus immediately after the fifth trial. The βA4 group took significantly longer than the vehicle group to learn to avoid the shock when trained to criterion 1 week later, suggesting a detrimental effect of βA4 on memory consolidation. Experiment 2 used a food reinforcer rather than shock relief under procedures similar to Experiment 1. Again, the βA4 group took longer to learn the maze to criterion. This shows that the effect in Experiment 1 was not specific to shock-maintained learning. In Experiment 3, rats were trained to retrieve a food pellet from each arm of an eight-arm radial maze. After training to criterion, β4 or vehicle was administered intrahippocampally 30 min before the daily session for 26 sessions. There were no acute or chronic effects of βA4 injection on radial maze performance, and no aggregation of βA4 or significant necrosis was observed upon postmortem histological analysis. These experiments suggest that single injections of βA4 impair memory consolidation, but repeated injections of βA4 over an extended period do not affect well-learned behavior.

UR - http://www.scopus.com/inward/record.url?scp=0028178742&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028178742&partnerID=8YFLogxK

U2 - 10.1016/S0163-1047(05)80059-7

DO - 10.1016/S0163-1047(05)80059-7

M3 - Article

VL - 62

SP - 60

EP - 67

JO - Neurobiology of Learning and Memory

JF - Neurobiology of Learning and Memory

SN - 1074-7427

IS - 1

ER -