Cited by 43Neuroscience and Neuropharmacology ResearchLipid Membrane Structure and BehaviorNeurotransmitter Receptor Influence on Behavior

Impact of Lipid Raft Integrity on 5-HT3 Receptor Function and its Modulation by Antidepressants

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Nothdurfter, Caroline, Tanasic, Sascha, Di Benedetto, Barbara, Rammes, Gerhard, Wagner, Eva-Maria, Kirmeier, Thomas, Ganal, Vanessa, Kessler, Julia S +3 more·2010·Neuropsychopharmacology

Abstract

Because of the biochemical colocalization of the 5-HT(3) receptor and antidepressants within raft-like domains and their antagonistic effects at this ligand-gated ion channel, we investigated the impact of lipid raft integrity for 5-HT(3) receptor function and its modulation by antidepressants. Treatment with methyl-beta-cyclodextrine (MbetaCD) markedly reduced membrane cholesterol levels and caused a more diffuse membrane distribution of the lipid raft marker protein flotillin-1 indicating lipid raft impairment. Both amplitude and charge of serotonin evoked cation currents were diminished following cholesterol depletion by either MbetaCD or simvastatin (Sim), whereas the functional antagonistic properties of the antidepressants desipramine (DMI) and fluoxetine (Fluox) at the 5-HT(3) receptor were retained. Although both the 5-HT(3) receptor and flotillin-1 were predominantly found in raft-like domains in western blots following sucrose density gradient centrifugation, immunocytochemistry revealed only a coincidental degree of colocalization of these two proteins. These findings and the persistence of the antagonistic effects of DMI and Fluox against 5-HT(3) receptors after lipid raft impairment indicate that their modulatory effects are likely mediated through non-raft 5-HT(3) receptors, which are not sufficiently detected by means of sucrose density gradient centrifugation. In conclusion, lipid raft integrity appears to be important for 5-HT(3) receptor function in general, whereas it is not a prerequisite for the antagonistic properties of antidepressants such as DMI and Fluox at this ligand-gated ion channel.

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Crossref · 10.1038/npp.2010.20

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Authors
Nothdurfter, C., Tanasic, S., Di Benedetto, B., Rammes, G., Wagner, E.-M., Kirmeier, T., Ganal, V., Kessler, J. S., Rein, T., Holsboer, F., & Rupprecht, R.
Affiliations
  • Ludwig-Maximilians-Universität München (DE)
  • Max Planck Institute of Psychiatry (DE)
Corresponding author
Rupprecht, Rainer
Venue
Neuropsychopharmacology
Published
2010-03-03
Volume
35
Issue
7
Pages
1510-1519
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W1993312736
Cited by
43
References
45
Citations by year
2026: 3 · 2025: 1 · 2024: 3 · 2023: 1 · 2022: 4 · 2021: 7 · 2020: 4 · 2019: 1 · 2018: 4 · 2017: 1 · 2016: 1 · 2014: 5 · 2013: 1 · 2012: 1
FWCI
1.04
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • mediaTUM – the media and publications repository of the Technical University Munich (Technical University Munich) (submittedVersion)
  • Trinity's Access to Research Output (TARA) (Trinity College Dublin) (submittedVersion)
Funders
Max-Planck-Gesellschaft
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Lipid Membrane Structure and Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
5-HT3 receptor, lipid rafts, membrane cholesterol, antidepressants, desipramine, fluoxetine, flotillin-1, simvastatin, ligand-gated ion channels, receptor antagonism, protein colocalization
MeSH terms
Animals, Anticholesteremic Agents, Antidepressive Agents, Biophysics, Cholesterol, Desipramine, Dose-Response Relationship, Drug, Drug Interactions, Electric Stimulation, Fluoxetine, Humans, Imidazoles, Membrane Potentials, Neuroblastoma, Serotonin, Sulfhydryl Compounds, Time Factors, Transfection, Patch-Clamp Techniques, Simvastatin, Membrane Microdomains, Receptors, Serotonin, 5-HT3, beta-Cyclodextrins, Mice

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