Cited by 275Nicotinic Acetylcholine Receptors StudyReceptor Mechanisms and SignalingNeuroscience and Neuropharmacology Research

Nicotine acts as a pharmacological chaperone to up-regulate human α4β2 acetylcholine receptors

Kuryatov, A., Luo, J., Cooper, J., Lindstrom, J.·2005·Molecular Pharmacology

Abstract

Human neuronal nicotinic acetylcholine receptor (AChR) alpha4 subunits and an alpha4 mutant (S247Falpha4) found in autosomal-dominant nocturnal frontal lobe epilepsy (ADNFLE) were expressed along with beta2 in permanently transfected tsA201 human embryonic kidney cell lines. Their sensitivity to activation, desensitization, and up-regulation by cholinergic ligands was investigated. Up-regulation after 3 to 24 h resulted primarily from an increase in assembly of AChRs from large pools of unassembled subunits, but up-regulation also resulted from a 5-fold increase in the lifetime of AChRs in the surface membrane. Up-regulation does not require current flow through surface membrane AChRs, because up-regulation occurs in the presence of the channel blocker mecamylamine and with the alpha4 mutant, which prevents nearly all AChR function. Both membrane-permeable ligands like nicotine and much less permeable quaternary amine cholinergic ligands can act as pharmacological chaperones within the endoplasmatic reticulum to promote the assembly of AChRs. Agonists are more potent pharmacological chaperones than antagonists, presumably because activated or desensitized conformations assemble more efficiently. Assembly intermediates are disrupted by solubilization in Triton X-100, but chemical cross-linking stabilizes a putative assembly intermediate approximately the size of an alpha4beta2alpha4beta2 tetramer.

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Crossref · 10.1124/mol.105.012419

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  • Current evidence indicates that nicotine, and presumably varenicline, raise nicotinic receptor density by promoting subunit assembly into mature receptors in the endoplasmic reticulum.

    “where current evidence indicates that nicotine and presumably varenicline act to increase nAChR density by stimulating assembly of subunits into mature receptors (Sallette et al., 2004(Sallette et al., , 2005;;Kuryatov et al., 2005;Lomazzo et al., 2011;Srinivasan et al., 2011).”
  • Nicotine enhances the assembly of functional nAChRs containing the α4 and β2 subunits.

    “Data from such favorable systems show that nicotine enhances the assembly of functional nAChRs containing the α4 and β2 subunits and also causes the preferential assembly of receptors with (α4)2(β2)3 stoichiometry (Buisson and Bertrand, 2001; Nelson et al., 2003; Kuryatov et al., 2005; Sallette et al., 2005; Vallejo et al., 2005; Son et al., 2009).”
  • Nicotine causes the preferential assembly of receptors with (α4)2(β2)3 stoichiometry.

    “Data from such favorable systems show that nicotine enhances the assembly of functional nAChRs containing the α4 and β2 subunits and also causes the preferential assembly of receptors with (α4)2(β2)3 stoichiometry (Buisson and Bertrand, 2001; Nelson et al., 2003; Kuryatov et al., 2005; Sallette et al., 2005; Vallejo et al., 2005; Son et al., 2009).”
  • Previous results based on glycosylation and molecular weight measures show that up-regulation is initiated in the ER.

    “These data correspond with previous results based on glycosylation and molecular weight measures, showing that up-regulation is initiated in the ER (Nelson et al., 2003; Kuryatov et al., 2005; Sallette et al., 2005).”
  • Chronic administration of either nicotine or nAChR antagonists results in nAChR up-regulation.

    “Moreover, it is well established that chronic administration of either nicotine or nAChR antagonists both result in nAChR up-regulation (Hulihan-Giblin et al., 1990a,b;Kuryatov et al., 2005;Picciotto et al., 2008;Buccafusco et al., 2009).”

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Authors
Kuryatov, A., Luo, J., Cooper, J., & Lindstrom, J.
Affiliations
University of Pennsylvania (US)
ORCID
Luo, J.
Venue
Molecular Pharmacology
Publisher
Elsevier BV
Published
2005-12
Volume
68
Issue
6
Pages
1839-1851
ISSN
0026-895X (ISSN-L)
OpenAlex
W2285361820
Cited by
275
References
46
Citations by year
2025: 5 · 2024: 4 · 2023: 6 · 2022: 7 · 2021: 3 · 2020: 10 · 2019: 9 · 2018: 8 · 2017: 12 · 2016: 19 · 2015: 24 · 2014: 17 · 2013: 17 · 2012: 22
FWCI
6.48
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Pharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Neurological Disorders and Stroke (NS11323, R01NS011323)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
nicotine, pharmacological chaperones, nicotinic acetylcholine receptors, alpha4beta2 receptor, receptor up-regulation, receptor assembly, autosomal dominant nocturnal frontal lobe epilepsy, receptor desensitization, mecamylamine, cholinergic ligands, endoplasmic reticulum, Triton X-100 solubilization, crosslinking
MeSH terms
Cell Line, Cross-Linking Reagents, Humans, Mutation, Nicotine, Receptors, Nicotinic, Transfection, Up-Regulation, Epilepsy, Frontal Lobe, Octoxynol, Molecular Chaperones, Dimerization, Protein Subunits

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