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Subthalamic low-frequency oscillations predict vulnerability to cocaine addiction.

Mickael Degoulet1,2, Alix Tiran-Cappello1,2, Etienne Combrisson1,2

  • 1Institut de Neurosciences de la Timone, UMR7289 CNRS, 13005 Marseille, France.

Proceedings of the National Academy of Sciences of the United States of America
|March 31, 2021
PubMed
Summary

Identifying early brain activity changes in rats can predict future compulsive cocaine seeking. Specific subthalamic nucleus deep brain stimulation (DBS) shows promise for treating addiction by reducing pathological drug use.

Keywords:
addictioncompulsive seekingdeep brain stimulationelectrical biomarkersubthalamic nucleus

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Area of Science:

  • Neuroscience
  • Addiction Research
  • Computational Psychiatry

Background:

  • Identifying individuals vulnerable to addiction is crucial for prevention.
  • Compulsive drug seeking is a hallmark of addiction, often studied in animal models.
  • Subthalamic nucleus (STN) oscillatory activity is implicated in compulsive behaviors.

Purpose of the Study:

  • To identify early predictors of compulsive cocaine seeking in a rat model.
  • To investigate the role of STN oscillatory activity in the development of compulsive drug use.
  • To evaluate the therapeutic potential of STN deep brain stimulation (DBS) for addiction.

Main Methods:

  • Utilized a rat model of cocaine seeking with foot-shock aversion to identify vulnerable individuals.
  • Monitored STN oscillatory activity (alpha/theta and low-beta bands) during cocaine intake escalation.
  • Induced pathological STN activity in non-compulsive rats.
  • Administered frequency-dependent STN DBS (30 Hz vs. 130 Hz) to compulsive rats.

Main Results:

  • Abnormal alpha/theta and low-beta band oscillations in the STN during cocaine escalation predicted subsequent compulsive-like seeking behavior.
  • Mimicking pathological STN activity induced compulsive behavior in non-compulsive rats.
  • 30 Hz STN DBS, but not 130 Hz, significantly reduced pathological cocaine seeking in compulsive rats.

Conclusions:

  • Early STN oscillatory activity serves as a predictive biomarker for compulsive cocaine seeking.
  • Frequency-specific STN DBS is a potential therapeutic strategy for addiction treatment.
  • This research offers insights into the neural mechanisms underlying addiction vulnerability and compulsive behavior.