Cited by 362Nicotinic Acetylcholine Receptors StudySmoking Behavior and CessationNeuroscience and Neuropharmacology Research

Increased nicotinic receptors in brains from smokers: membrane binding and autoradiography studies

Perry, David C., Dávila-Garcı́a, Martha I., Stockmeier, Craig A., Kellar, Kenneth J.·1999·The Journal of Pharmacology and Experimental Therapeutics

Abstract

Chronic administration of nicotine increases the density of neuronal cholinergic nicotinic receptors in cells and in rodent brain, and similar increases have been reported in brains from human smokers. To further examine this phenomenon, we measured nicotinic receptor binding sites in brain regions from matched populations of smokers and nonsmokers. We first measured binding of [3H](+/-)epibatidine ([3H]EB) and [3H]cytisine in homogenate preparations from samples of prefrontal and temporal cerebral cortex. Binding of each radioligand was significantly higher (250-300%) in both cortical regions from brains of smokers. Frozen sections from each of the cerebral cortical regions and the hippocampus were used for autoradiographic analysis of [3H]EB binding. In cerebral cortex, binding was most dense in layer VI in the prefrontal cortex and layers IV and VI in the temporal cortex. Densitometric analysis of [3H]EB binding sites revealed marked increases of 300 to 400% of control in all cortical regions examined from smokers' brains. Binding in the hippocampal formation was heterogeneously distributed, with dense areas of binding sites seen in the parasubiculum, subiculum, and molecular layer of the dentate gyrus, and the lacunosum-moleculare layer of the CA1/2. Binding of [3H]EB was significantly higher in all six regions of the hippocampus examined from brains of smokers compared with nonsmokers. These increases ranged from 160% of control in parasubiculum to 290% in the molecular layer of the dentate gyrus. The increase in nicotinic receptors in the cerebral cortex and hippocampus of smokers may modify the central nervous system effects of nicotine and contribute to an altered response of smokers to nicotine.

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Crossref · 10.1016/s0022-3565(24)38304-1

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Authors
Perry, D. C., Dávila-Garcı́a, M. I., Stockmeier, C. A., & Kellar, K. J.
Affiliations
Georgetown University (US)
Corresponding author
Kellar, Kenneth J.
Venue
The Journal of Pharmacology and Experimental Therapeutics
Publisher
Elsevier BV
Published
1999-06
Volume
289
Issue
3
Pages
1545-1552
ISSN
0022-3565 (ISSN-L)
OpenAlex
W2139654665
Cited by
362
References
48
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2023: 3 · 2022: 4 · 2021: 5 · 2020: 8 · 2019: 9 · 2018: 13 · 2017: 9 · 2016: 17 · 2015: 24 · 2014: 19 · 2013: 10 · 2012: 20
FWCI
4.12
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Pharmacology and Experimental Therapeutics (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed
Funders
  • National Institutes of Health (5r01ns034706-03, 5r01da006486-10)
  • National Institute of Mental Health (MH-45488, R01MH045488)
  • National Institute on Drug Abuse (DA-06486)
  • National Institute of Neurological Disorders and Stroke (NS34706)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
nicotinic acetylcholine receptors, smoking, nicotine, receptor up-regulation, cerebral cortex, hippocampus, prefrontal cortex, temporal cortex, epibatidine binding, autoradiography
MeSH terms
Quinolizidine Alkaloids, Adult, Aged, Aging, Alkaloids, Autopsy, Autoradiography, Azocines, Brain, Cerebral Cortex, Female, Hippocampus, Humans, Male, Middle Aged, Neurons, Pyridines, Quinolizines, Radioligand Assay, Receptors, Nicotinic, Smoking, Temporal Lobe, Tritium, Prefrontal Cortex, Nicotinic Agonists, Bridged Bicyclo Compounds, Heterocyclic

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