Cited by 261Olfactory and Sensory Function StudiesMemory and Neural MechanismsNeurogenesis and neuroplasticity mechanisms

Norepinephrine and learning-induced plasticity in infant rat olfactory system

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Sullivan, RM, Wilson, DA, Leon, M·1989·The Journal of Neuroscience

Abstract

Postnatal olfactory learning produces both a conditioned behavioral response and a modified olfactory bulb neural response to the learned odor. The present report describes the role of norepinephrine (NE) on both of these learned responses in neonatal rat pups. Pups received olfactory classical conditioning training from postnatal days (PN) 1-18. Training consisted of 18 trials with an intertrial interval of 24 hr. For the experimental group, a trial consisted of a pairing of unconditioned stimulus (UCS, stroking/tactile stimulation) and the conditioned stimulus (CS, odor). Control groups received either only the CS (Odor only) or only the UCS (Stroke only). Within each training condition, pups were injected with either the NE beta-receptor agonist isoproterenol (1, 20, or 4 mg/kg), the NE beta-receptor antagonist propranolol (10, 20, 40 mg/kg), or saline 30 min prior to training. On day 20, pups received one of the following tests: (1) behavioral conditioned responding, (2) injection with 14C-2-deoxyglucose (2-DG) and exposed to the CS odor, or (3) tested for olfactory bulb mitral/tufted cell single-unit responses to the CS odor. The results indicated that training with either: (1) Odor-Stroke-Saline, (2) Odor-Stroke-Isoproterenol-Propranolol, or (3) Odor only-Isoproterenol (2 mg/kg) was sufficient to produce a learned behavioral odor preference, enhanced uptake of 14C-2-DG in the odor-specific foci within the bulb, and a modified output signal from the bulb as measured by single-cell recordings of mitral/tufted cells. Moreover, propranolol injected prior to Odor-Stroke training blocked the acquisition of both the learned behavior and olfactory bulb responses. Thus, NE is sufficient and may be necessary for the acquisition of both learned olfactory behavior and olfactory bulb responses.

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Crossref · 10.1523/jneurosci.09-11-03998.1989

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  1. Hofer, M. A. (1987) Shaping forces within early social relationships. In Perinatal Development, N. A. Krasnegor, E. M. Blass, M. A. Hofer, and W. P. Smotherman, eds., pp. 25 l-274, Academic, New York.

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Authors
Sullivan, R., Wilson, D., & Leon, M.
Affiliations
University of California, Irvine (US)
Venue
The Journal of Neuroscience
Published
1989-11-01
Volume
9
Issue
11
Pages
3998-4006
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1768602584
Cited by
261
References
81
Citations by year
2026: 4 · 2025: 3 · 2024: 1 · 2023: 2 · 2022: 1 · 2021: 2 · 2020: 4 · 2019: 4 · 2018: 7 · 2017: 6 · 2016: 5 · 2015: 3 · 2014: 9 · 2013: 7 · 2012: 8
FWCI
6.41
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
Funders
  • National Science Foundation (8606786)
  • National Institute of Mental Health
  • National Institute of Neurological Disorders and Stroke (NS26100, NS21484)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (P01HD024236, HD0681, P01 HD024236-080005)
Topics
  • Life Sciences › Neuroscience › Sensory Systems › Olfactory and Sensory Function Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
norepinephrine, olfactory learning, postnatal development, olfactory bulb, mitral/tufted cells, propranolol, isoproterenol, beta-adrenergic receptors, odor preference, 2-deoxyglucose uptake, single-unit responses, neonatal rats
MeSH terms
Animals, Conditioning, Classical, Dose-Response Relationship, Drug, Female, Handling, Psychological, Isoproterenol, Learning, Male, Neuronal Plasticity, Norepinephrine, Odorants, Olfactory Bulb, Propranolol, Rats, Inbred Strains, Rats

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