Crossref journal-article
Society for Neuroscience
The Journal of Neuroscience (393)
Abstract

Endocannabinoids form a novel class of retrograde messengers that modulate short- and long-term synaptic plasticity. Depolarization-induced suppression of excitation (DSE) and inhibition (DSI) are the best characterized transient forms of endocannabinoid-mediated synaptic modulation. Stimulation protocols consisting of long-lasting voltage steps to the postsynaptic cell are routinely used to evoke DSE-DSI. Little is known, however, about more physiological conditions under which these molecules are releasedin vitro. Moreover, the occurrencein vivoof such forms of endocannabinoid-mediated modulation is still controversial. Here we show that physiologically relevant patterns of synaptic activity induce a transient suppression of excitatory transmission onto dopamine neuronsin vitro. Accordingly,in vivoendocannabinoids depress the increase in firing and bursting activity evoked in dopamine neurons by prefrontal cortex stimulation. This phenomenon is selectively mediated by the endocannabinoid 2-arachidonoyl-glycerol (2-AG), which activates presynaptic cannabinoid type 1 receptors. 2-AG synthesis involves activation of metabotropic glutamate receptors and Ca2+mobilization from intracellular stores. These findings indicate that dopamine neurons release 2-AG to shape afferent activity and ultimately their own firing pattern. This novel endocannabinoid-mediated self-regulatory role of dopamine neurons may bear relevance in the pathogenesis of neuropsychiatric disorders such as schizophrenia and addiction.

Bibliography

Melis, M., Perra, S., Muntoni, A. L., Pillolla, G., Lutz, B., Marsicano, G., Di Marzo, V., Gessa, G. L., & Pistis, M. (2004). Prefrontal Cortex Stimulation Induces 2-Arachidonoyl-Glycerol-Mediated Suppression of Excitation in Dopamine Neurons. The Journal of Neuroscience, 24(47), 10707–10715.

Authors 9
  1. Miriam Melis (first)
  2. Simona Perra (additional)
  3. Anna Lisa Muntoni (additional)
  4. Giuliano Pillolla (additional)
  5. Beat Lutz (additional)
  6. Giovanni Marsicano (additional)
  7. Vincenzo Di Marzo (additional)
  8. Gian Luigi Gessa (additional)
  9. Marco Pistis (additional)
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Dates
Type When
Created 20 years, 9 months ago (Nov. 24, 2004, 6:03 p.m.)
Deposited 2 years, 4 months ago (April 13, 2023, 12:27 p.m.)
Indexed 1 week, 2 days ago (Aug. 27, 2025, 12:31 p.m.)
Issued 20 years, 9 months ago (Nov. 24, 2004)
Published 20 years, 9 months ago (Nov. 24, 2004)
Published Online 20 years, 9 months ago (Nov. 24, 2004)
Published Print 20 years, 9 months ago (Nov. 24, 2004)
Funders 0

None

@article{Melis_2004, title={Prefrontal Cortex Stimulation Induces 2-Arachidonoyl-Glycerol-Mediated Suppression of Excitation in Dopamine Neurons}, volume={24}, ISSN={1529-2401}, url={http://dx.doi.org/10.1523/jneurosci.3502-04.2004}, DOI={10.1523/jneurosci.3502-04.2004}, number={47}, journal={The Journal of Neuroscience}, publisher={Society for Neuroscience}, author={Melis, Miriam and Perra, Simona and Muntoni, Anna Lisa and Pillolla, Giuliano and Lutz, Beat and Marsicano, Giovanni and Di Marzo, Vincenzo and Gessa, Gian Luigi and Pistis, Marco}, year={2004}, month=nov, pages={10707–10715} }