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Smoking and schizophrenia: abnormal nicotinic receptor expression
Abstract
Biological and genetic evidence suggests a role for the neuronal nicotinic receptors in the neuropathophysiology of schizophrenia. Nicotine normalizes an auditory evoked potential deficit seen in subjects who suffer from the disease. Nicotinic receptors with both high and low affinity for nicotine are decreased in postmortem brain of schizophrenics compared to control subjects. The chromosomal locus of the human alpha-7 gene (15q14) is linked to the gating deficit with a lod of 5.3, and antagonists of the alpha-7 receptor (alpha-bungarotoxin and methyllycaconitine) induce a loss of gating in rodents. We have cloned the human alpha-7 gene and found it to be partially duplicated proximal to the full-length gene. The duplication is expressed in both the brain and in peripheral blood cells of normal subjects, but is missing in some schizophrenic subjects. The results of these studies suggest the presence of abnormal expression and function of the neuronal nicotinic receptor gene family in schizophrenia.
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“Genetic and functional studies have implicated α7 nAChRs in prepulse inhibition, a physiological marker associated with schizophrenia (Leonard et al. 2000;Freedman et al. 2003).”
From Mechanisms of Nicotine Addiction (2021) · cites this paper as Leonard et al. 2000
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Metadata
- Authors
- Leonard, S., Breese, C., Adams, C., Benhammou, K., Gault, J., Stevens, K., Lee, M., Adler, L., Olincy, A., Ross, R., & Freedman, R.
- Affiliations
- Veterans Health Administration (US)
- Auburn University (US)
- Corresponding author
- Leonard, Sherry
- Venue
- European Journal of Pharmacology
- Publisher
- Elsevier BV
- Published
- 2000-03
- Volume
- 393
- Issue
- 1-3
- Pages
- 237-242
- ISSN
- 0014-2999 (ISSN-L)
- OpenAlex
- W2058494585
- Cited by
- 177
- References
- 70
- Citations by year
- 2025: 3 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 4 · 2019: 2 · 2018: 3 · 2017: 3 · 2016: 7 · 2015: 7 · 2014: 10 · 2013: 8 · 2012: 12
- FWCI
- 3.98
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- European Journal of Pharmacology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
- Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Smoking Behavior and Cessation
- Keywords
- schizophrenia, smoking, neuronal nicotinic acetylcholine receptors, gene expression, gene duplication, receptor gating, postmortem brain, alpha-bungarotoxin, methyllycaconitine, genetic linkage
- MeSH terms
- Animals, Brain, Chromosome Mapping, Chromosomes, Human, Pair 15, Cloning, Molecular, Disease Models, Animal, Humans, Leukocytes, Mononuclear, Nicotine, Receptors, Nicotinic, Schizophrenia, Smoking, Gene Expression, Mice, alpha7 Nicotinic Acetylcholine Receptor
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