Cited by 24Nicotinic Acetylcholine Receptors StudyMemory and Neural MechanismsNeuroscience and Neuropharmacology Research

Trace Eyeblink Conditioning is Impaired in α7 but not in β2 Nicotinic Acetylcholine Receptor Knockout Mice

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Brown, Kevin L., Comalli, David M., Biasi, Mariella De, Woodruff-Pak, Diana S.·2010·Frontiers in Behavioral Neuroscience

Abstract

Nicotinic acetylcholine receptors (nAChRs) are essentially involved in learning and memory. A neurobiologically and behaviorally well-characterized measure of learning and memory, eyeblink classical conditioning, is sensitive to disruptions in acetylcholine neurotransmission. The two most common forms of eyeblink classical conditioning - the delay and trace paradigms - differentially engage forebrain areas densely-populated with nAChRs. The present study used genetically modified mice to investigate the effects of selective nAChR subunit deletion on delay and trace eyeblink classical conditioning. α7 and β2 nAChR subunit knockout (KO) mice and their wild-type littermates were trained for 10 daily sessions in a 500-ms delay or 500-ms trace eyeblink conditioning task, matched for the interstimulus interval between conditioned stimulus and unconditioned stimulus onset. Impairments in conditioned responding were found in α7 KO mice trained in trace - but not delay - eyeblink conditioning. Relative to littermate controls, β2 KO mice were unimpaired in the trace task but displayed higher levels of conditioned responding in delay eyeblink conditioning. Elevated conditioned response levels in delay-conditioned β2 KOs corresponded to elevated levels of alpha responding in this group. These findings suggest that α7 nAChRs play a role in normal acquisition of 500 ms trace eyeblink classical conditioning in mice. The prominent distribution of α7 nAChRs in the hippocampus and other forebrain regions may account for these genotype-specific acquisition effects in this hippocampus-dependent trace paradigm.

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  • Mice lacking the α7 subunit have impaired trace eye-blink conditioning.

    “Mice lacking the α7 subunit have been shown to have impaired trace eye-blink conditioning (Brown et al. 2010).”

    From Mechanisms of Nicotine Addiction (2021) · cites this paper as Brown et al. 2010

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Research works printed but not linked: 3

  1. Lindstrom J. Schoepfer R. Conroy W. Whiting P. Das M. Saedi M. Anand R. (1991). The nicotinic acetylcholine receptor gene family: structure of nicotinic receptors from muscle and neurons and neuronal α-bungarotoxin-binding proteins. Adv. Exp. Med. Biol. 287, 255– 278 1759611
  2. Woodruff-Pak D. S. Lehr M. A. Li J.-G. Liu-Chen L.-Y. (2010). Good learners have higher levels of brain nicotinic receptor binding than poor learners. Neurobiol. Aging 31, 1032– 1043 10.1016/j.neurobiolaging.2008.09.002 18950900 PMC2858226 · DOI
  3. Woodruff-Pak D. S. Steinmetz J. E. (2000b). Eyeblink Classical Conditioning, Vol. 2, Animal Models. Boston: Kluwer Academic Publishers

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Authors
Brown, K. L., Comalli, D. M., Biasi, M. D., & Woodruff-Pak, D. S.
Affiliations
  • Temple University (US)
  • Baylor College of Medicine (US)
Venue
Frontiers in Behavioral Neuroscience
Published
2010
Volume
4
Pages
166-166
ISSN
1662-5153 (ISSN-L)
OpenAlex
W2117143428
Cited by
24
References
69
Citations by year
2022: 1 · 2021: 2 · 2020: 2 · 2017: 1 · 2015: 2 · 2014: 3 · 2013: 6 · 2012: 6
FWCI
1.69
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Behavioral Neuroscience (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • National Institute on Aging (R01AG023742, R01AG021925)
  • National Institute on Drug Abuse (R01DA017173)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
nicotinic acetylcholine receptors, alpha7 nAChR, beta2 nAChR, eyeblink classical conditioning, trace conditioning, delay conditioning, learning and memory, acetylcholine neurotransmission, hippocampus, conditioned responding

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