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Cocaine-induced endocannabinoid signaling mediated by sigma-1 receptors and extracellular vesicle secretion

  1. Yoki Nakamura
  2. Dilyan I Dryanovski
  3. Yuriko Kimura
  4. Shelley N Jackson
  5. Amina S Woods
  6. Yuko Yasui
  7. Shang-Yi Tsai
  8. Sachin Patel
  9. Daniel P Covey
  10. Tsung-Ping Su
  11. Carl Lupica  Is a corresponding author
  1. National Institute on Drug Abuse, National Institutes of Health, United States
  2. Vanderbilt University Medical Center, United States
  3. University of Maryland School of Medicine, United States
Research Article
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Cite this article as: eLife 2019;8:e47209 doi: 10.7554/eLife.47209

Abstract

Cocaine is an addictive drug that acts in brain reward areas. Recent evidence suggests that cocaine stimulates synthesis of the endocannabinoid 2-arachidonoylglycerol (2-AG) in midbrain, increasing dopamine neuron activity via disinhibition. Although a mechanism for cocaine-stimulated 2-AG synthesis is known, our understanding of 2-AG release is limited. In NG108 cells and mouse midbrain tissue we find that 2-AG is localized in non-synaptic extracellular vesicles (EVs) that are secreted in the presence of cocaine via interaction with the chaperone protein sigma-1 receptor (Sig-1R). The release of EVs occurs when cocaine causes dissociation of the Sig-1R from ADP-ribosylation factor (ARF6), a G-protein regulating EV trafficking, leading to activation of myosin light chain kinase (MLCK). Blockade of Sig-1R function, or inhibition of ARF6 or MLCK also prevented cocaine-induced EV release and cocaine-stimulated 2-AG-modulation of inhibitory synapses in DA neurons. Our results implicate the Sig-1R-ARF6 complex in control of EV release and demonstrate that cocaine-mediated 2-AG release can occur via EVs.

Article and author information

Author details

  1. Yoki Nakamura

    Cellular Pathobiology Section, National Institute on Drug Abuse, National Institutes of Health, Baltimore, United States
    Competing interests
    The authors declare that no competing interests exist.
  2. Dilyan I Dryanovski

    Electrophysiology Research Section, National Institute on Drug Abuse, National Institutes of Health, Baltimore, United States
    Competing interests
    The authors declare that no competing interests exist.
  3. Yuriko Kimura

    Cellular Pathobiology Section, National Institute on Drug Abuse, National Institutes of Health, Baltimore, United States
    Competing interests
    The authors declare that no competing interests exist.
  4. Shelley N Jackson

    Structural Biology Unit, National Institute on Drug Abuse, National Institutes of Health, Baltimore, United States
    Competing interests
    The authors declare that no competing interests exist.
  5. Amina S Woods

    Structural Biology Unit, National Institute on Drug Abuse, National Institutes of Health, Baltimore, United States
    Competing interests
    The authors declare that no competing interests exist.
  6. Yuko Yasui

    Cellular Pathobiology Section, National Institute on Drug Abuse, National Institutes of Health, Baltimore, United States
    Competing interests
    The authors declare that no competing interests exist.
  7. Shang-Yi Tsai

    Cellular Pathobiology Section, National Institute on Drug Abuse, National Institutes of Health, Baltimore, United States
    Competing interests
    The authors declare that no competing interests exist.
  8. Sachin Patel

    Department of Psychiatry and Behavioral Sciences, Vanderbilt University Medical Center, Nashville, United States
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0001-8052-520X
  9. Daniel P Covey

    Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, United States
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0001-9596-108X
  10. Tsung-Ping Su

    Cellular Pathobiology Section, National Institute on Drug Abuse, National Institutes of Health, Baltimore, United States
    Competing interests
    The authors declare that no competing interests exist.
  11. Carl Lupica

    Electrophysiology Research Section, National Institute on Drug Abuse, National Institutes of Health, Baltimore, United States
    For correspondence
    clupica@mail.nih.gov
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-5375-3263

Funding

National Institute on Drug Abuse (1ZIADA000487-14)

  • Carl Lupica

National Institute on Drug Abuse (1ZIADA000206-33)

  • Tsung-Ping Su

The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.

Ethics

Animal experimentation: Ethics Statement: All animal procedures were conducted in accordance with the principles as indicated by the NIH Guide for the Care and Use of Laboratory Animals. These animal protocols were also reviewed and approved by the NIDA intramural research program Animal Care and Use Committee, which is fully accredited by the Assessment and Accreditation of Laboratory Animal Care (AAALAC) International (approved protocols: 17-CNRB-15, 16-CNRB-128, 16-INB-1, 16-INB-3, 17-INB-5).

Reviewing Editor

  1. Gary L Westbrook, Oregon Health and Science University, United States

Publication history

  1. Received: March 28, 2019
  2. Accepted: October 3, 2019
  3. Accepted Manuscript published: October 9, 2019 (version 1)

Copyright

This is an open-access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.

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