Cited by 89Nicotinic Acetylcholine Receptors StudyNeurotransmitter Receptor Influence on BehaviorPeroxisome Proliferator-Activated Receptors

Peroxisome Proliferator-Activated Receptors-Alpha Modulate Dopamine Cell Activity Through Nicotinic Receptors

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Melis, Miriam, Carta, Stefano, Fattore, Liana, Tolu, Stefania, Yasar, Sevil, Goldberg, Steven R., Fratta, Walter, Maskos, Uwe +1 more·2010·Biological Psychiatry

Abstract

Background Modulation of midbrain dopamine neurons by nicotinic acetylcholine receptors (nAChRs) plays an important role in behavior, cognition, motivation, and reward. Specifically, nAChRs containing beta2 subunits (beta2-nAChRs) switch dopamine cells from a resting to an excited state. However, how beta2-nAChRs can be modulated and thereby how dopamine firing activity is affected remains elusive. Because changes in dopamine cell activity are reflected in the dynamics of microcircuits generating altered responses to stimuli and inputs, factors regulating their state are fundamental. Among these, endogenous ligands to the nuclear receptor-transcription factor peroxisome proliferator-activated receptors type-alpha (PPARalpha) have been recently found to suppress nicotine-induced responses of dopamine neurons.Methods We used both in vitro and in vivo electrophysiological techniques together with behavioral analysis to investigate on the effects of modulation of PPARalpha in Sprague-Dawley rat and C57BLJ/6 mouse dopamine neurons and their interactions with beta2-nAChRs. To this aim, we took advantage of a selective reexpression of beta2-nAChR exclusively in dopamine cells by stereotaxically injecting a lentiviral vector in the mouse ventral tegmental area.Results We found that activation of PPARalpha decreases in vitro both dopamine cell activity and ventral tegmental area net output through negative modulation of beta2-nAChRs. Additionally, PPARalpha activation in vivo reduces both the number of spontaneously active dopamine neurons and nicotine-induced increased locomotion.Conclusions Our combined findings suggest PPARalpha ligands as important negative modulators of beta2-nAChRs on dopamine neurons. Thus, PPARalpha ligands might prove beneficial in treating disorders in which dopamine dysfunction plays a prominent role, such as schizophrenia and nicotine addiction.

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Crossref · 10.1016/j.biopsych.2010.04.016

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  • PPARα signaling increases β2-nAChR phosphorylation, which subsequently decreases ventral tegmental area dopamine neuron firing.

    “Peroxisome proliferator-activated receptor α (PPARα) signaling increases β2-nAChR phosphorylation, which subsequently decreases VTA dopamine neuron firing [58].”

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Authors
Melis, M., Carta, S., Fattore, L., Tolu, S., Yasar, S., Goldberg, S. R., Fratta, W., Maskos, U., & Pistis, M.
Affiliations
  • University of Cagliari (IT)
  • National Research Council (IT)
  • National Institutes of Health (US)
  • Centre National de la Recherche Scientifique (FR)
Corresponding author
Melis, Miriam
Venue
Biological Psychiatry
Publisher
Elsevier BV
Published
2010-08
Volume
68
Issue
3
Pages
256-264
ISSN
0006-3223 (ISSN-L)
OpenAlex
W2021982247
Cited by
89
References
55
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 8 · 2022: 3 · 2021: 6 · 2020: 6 · 2019: 4 · 2018: 6 · 2017: 7 · 2016: 7 · 2015: 8 · 2014: 5 · 2013: 8 · 2012: 11
FWCI
3.00
Type
journal article
Language
en
Open access
Locations
  • Biological Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • HAL (submittedVersion)
  • UNICA IRIS Institutional Research Information System (University of Cagliari) (submittedVersion)
Funders
  • Division of Geriatric Medicine and Gerontology of Johns Hopkins University School of Medicine
  • Intramural Research Program of the National Institute on Drug Abuse
  • National Institutes of Health
  • Department of Health and Human Services
  • European Commission 7th Framework Programme Neurocypres Project
  • Agence Nationale de la Recherche Blanc
  • Agence Nationale de la Recherche Maladies Neurologiques et Psychiatriques 2009
  • Institut Pasteur
  • Centre National de la Recherche Scientifique Unit́e de Recherche Assocíee 2182
  • Institut National du Cancer BIO-SILC
  • Fondation pour la Recherche Ḿedicale
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
Keywords
PPARα, nicotinic acetylcholine receptors, beta2 nAChR, dopaminergic neurons, ventral tegmental area, nicotine, schizophrenia, nicotine dependence, negative modulation
MeSH terms
Analysis of Variance, Animals, Dopamine, Male, Mice, Inbred C57BL, Mice, Transgenic, Motor Activity, Neurons, Receptors, Nicotinic, Signal Transduction, Rats, Sprague-Dawley, Ventral Tegmental Area, Mice, Knockout, Receptor Cross-Talk, PPAR alpha, Mice, Rats

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