Cited by 120Nicotinic Acetylcholine Receptors StudyNeuroscience and Neuropharmacology ResearchReceptor Mechanisms and Signaling

Sazetidine-A Is a Potent and Selective Agonist at Native and Recombinant α4β2 Nicotinic Acetylcholine Receptors

Zwart, Ruud, Carbone, Anna L., Moroni, Mirko, Bermudez, Isabel, Mogg, Adrian J., Folly, Elizabeth A., Broad, Lisa M., Williams, Andrew C. +4 more·2008·Molecular Pharmacology

Abstract

Sazetidine-A has been recently proposed to be a "silent desensitizer" of alpha4beta2 nicotinic acetylcholine receptors (nAChRs), implying that it desensitizes alpha4beta2 nAChRs without first activating them. This unusual pharmacological property of sazetidine-A makes it, potentially, an excellent research tool to distinguish between the role of activation and desensitization of alpha4beta2 nAChRs in mediating the central nervous system effects of nicotine itself, as well as those of new nicotinic drugs. We were surprised to find that sazetidine-A potently and efficaciously stimulated nAChR-mediated dopamine release from rat striatal slices, which is mediated by alpha4beta2(*) and alpha6beta2(*) subtypes of nAChR. The agonist effects on native striatal nAChRs prompted us to re-examine the effects of sazetidine-A on recombinant alpha4beta2 nAChRs in more detail. We expressed the two alternative stoichiometries of alpha4beta2 nAChR in Xenopus laevis oocytes and investigated the agonist properties of sazetidine-A on both alpha4(2)beta2(3) and alpha4(3)beta2(2) nAChRs. We found that sazetidine-A potently activated both stoichiometries of alpha4beta2 nAChR: it was a full agonist on alpha4(2)beta2(3) nAChRs, whereas it had an efficacy of only 6% on alpha4(3)beta2(2) nAChRs. In contrast to what has been published before, we therefore conclude that sazetidine-A is an agonist of native and recombinant alpha4beta2 nAChRs but shows differential efficacy on alpha4beta2 nAChRs subtypes.

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Crossref · 10.1124/mol.108.045104

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  • Sazetidine-A quickly and thoroughly desensitizes the receptor after brief partial agonism.

    “Sazetidine-A is a recently developed nicotinic compound with high affinity and selectivity for a4b2 nAChRs, but not a3b4 or a7 nAChRs (Xiao et al, 2006), that quickly and thoroughly desensitizes the receptor after brief partial agonism (Xiao et al, 2006; Zwart et al, 2008).”
  • Low concentrations of sazetidine-A profoundly desensitize α4β2 nAChRs for prolonged periods.

    “In vitro studies show that low concentrations of sazetidine-A profoundly desensitize a4b2 nAChRs for prolonged periods (Xiao et al, 2006; Zwart et al, 2008).”
  • Sazetidine-A binds with very low affinity to all other nicotinic receptor subtypes.

    “A newly developed nicotinic partial agonist, sazetidine-A, potently and selectively desensitizes ␣4␤2 nicotinic acetylcholine receptors (Xiao et al., 2006), but it has very low affinities for all other nAChR subtypes (Xiao et al., 2006;Zwart et al., 2008).”
  • Saz-A is a partial agonist at α4β2 nAChRs that may show differential efficacy depending on receptor stoichiometry.

    “Sazetidine-A [saz-A; 6-(5-(((S)-azetidin-2-yl)methoxy)pyridin-3-yl)hex-5-yn-l-ol] is a partial agonist at ␣4␤2 nAChRs that may show differential efficacy at this receptor subtype depending on the stoichiometry (Zwart et al., 2008).”

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Authors
Zwart, R., Carbone, A. L., Moroni, M., Bermudez, I., Mogg, A. J., Folly, E. A., Broad, L. M., Williams, A. C., Zhang, D., Ding, C., Heinz, B. A., & Sher, E.
Affiliations
Eli Lilly (United Kingdom) (GB)
Venue
Molecular Pharmacology
Publisher
Elsevier BV
Published
2008-06
Volume
73
Issue
6
Pages
1838-1843
ISSN
0026-895X (ISSN-L)
OpenAlex
W1982378333
Cited by
111
References
37
Citations by year
2026: 3 · 2025: 2 · 2024: 1 · 2023: 2 · 2022: 6 · 2021: 5 · 2020: 7 · 2019: 3 · 2018: 5 · 2017: 2 · 2016: 12 · 2015: 10 · 2014: 15 · 2013: 11 · 2012: 7
FWCI
2.74
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Pharmacology (publishedVersion)
  • PubMed (publishedVersion)
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 › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
Keywords
α4β2 nicotinic acetylcholine receptor, nicotinic agonists, receptor stoichiometry, striatal dopamine release
MeSH terms
Animals, Azetidines, Cell Line, Dose-Response Relationship, Drug, Female, Humans, Male, Pyridines, Receptors, Nicotinic, Recombinant Proteins, Xenopus laevis, Nicotinic Agonists, Rats

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