Cited by 161Nicotinic Acetylcholine Receptors StudyNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Impaired performance of alpha7 nicotinic receptor knockout mice in the five-choice serial reaction time task

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Hoyle, E., Genn, R. F., Fernandes, C., Stolerman, I. P.·2006·Psychopharmacology

Abstract

RATIONALE: Nicotinic receptors have been implicated in attentional performance. Nicotine can improve attention in animals and humans, but knowledge about relevant receptor subtypes is very limited. OBJECTIVES: The aim was to examine the role of alpha7 receptors in attentional performance of mice and in effects of nicotine. MATERIALS AND METHODS: Mice with targeted deletion of the gene coding for the alpha7 subunit of nicotinic receptors and wild-type controls were trained on a five-choice serial reaction time task with food reinforcers presented under varying parametric conditions. Nicotine was administered in a range of doses (0.001-1.0 mg/kg sc), including those reported to enhance attentional performance. RESULTS: Initially the alpha7(-/-) (knockout) mice responded less accurately and made more anticipatory responses. After task parameters were altered so that the time allowed for responding was reduced and anticipatory (impulsive) responses were punished by a time-out, the pattern of performance deficits changed; there were increased omission errors in alpha7(-/-) mice but normal levels of accuracy and anticipatory responding. Nicotine did not improve any measure of performance, either with the original training parameters or after retraining; the largest dose used (1.0 mg/kg) produced a general impairment of responding in alpha7(-/-) and wild-type mice. CONCLUSIONS: alpha7 nicotinic receptor knockout mice are impaired in performance of the 5-CSRTT, suggesting a possible role for alpha7 receptors in attentional processing. However, identification of a protocol for assessing attention-enhancing effects of nicotine in mice may require further modifications of test procedures or the use of different strains of animal.

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Authors
Hoyle, E., Genn, R. F., Fernandes, C., & Stolerman, I. P.
Affiliations
King's College London (GB)
Corresponding author
Stolerman, I. P.
Venue
Psychopharmacology
Published
2006-09-20
Volume
189
Issue
2
Pages
211-223
ISSN
  • 0033-3158 (ISSN-L)
  • 1432-2072
OpenAlex
W2029743369
Cited by
161
References
39
Citations by year
2026: 5 · 2025: 2 · 2024: 4 · 2023: 3 · 2022: 4 · 2021: 3 · 2020: 6 · 2019: 4 · 2018: 3 · 2017: 10 · 2016: 14 · 2015: 17 · 2014: 11 · 2013: 7 · 2012: 20
FWCI
3.12
Type
journal article
Language
en
Open access
Locations
  • Psychopharmacology (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (submittedVersion)
Funders
Medical Research Council
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
alpha7 nicotinic acetylcholine receptor, knockout mice, attention, 5-choice serial reaction time task, nicotine, omission errors, impulsivity, attentional performance
MeSH terms
Animals, Attention, Conditioning, Operant, Dose-Response Relationship, Drug, Ganglionic Stimulants, Genotype, Male, Mice, Inbred C57BL, Nicotine, Psychomotor Performance, Reaction Time, Receptors, Nicotinic, Reinforcement, Psychology, Serial Learning, Mice, Knockout, Mice, alpha7 Nicotinic Acetylcholine Receptor

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