Claustral neurons projecting to frontal cortex restrict opioid consumption

Area of Science:

• Neuroscience
• Neurobiology
• Addiction Research

Background:

• Fentanyl is a potent synthetic opioid driving the current opioid addiction crisis.
• Understanding the neural circuits controlling opioid self-administration is crucial for developing effective treatments.

Purpose of the Study:

• To investigate the role of claustral neurons projecting to the frontal cortex in regulating oral fentanyl self-administration.
• To explore the impact of manipulating these specific neural pathways on fentanyl consumption and associated behaviors.

Main Methods:

• Utilized optogenetics to stimulate and inhibit frontal-projecting claustral neurons in mice during fentanyl self-administration.
• Measured changes in fentanyl consumption, conditioned place preference, and neural representations in the frontal cortex.
• Employed transcriptional analysis to understand how fentanyl affects these neurons.

Main Results:

• Fentanyl transcriptionally activates frontal-projecting claustrum neurons.
• These neurons show suppressed Ca2+ activity during fentanyl consumption bouts.
• Optogenetic stimulation of these neurons decreased fentanyl intake, while inhibition increased it, sensitized place preference, and enhanced frontal cortex representations.

Conclusions:

• Claustral neurons projecting to the frontal cortex exert inhibitory control over fentanyl intake.
• Modulating the activity of the claustro-frontal projection may be a viable therapeutic strategy for reducing opioid addiction.