A midbrain-cortical circuit mediated by a claustrum neuronal ensemble orchestrates drug-paired context memory...

Area of Science:

• Neuroscience
• Addiction Research
• Molecular Biology

Background:

• Drug-associated environmental cues are potent triggers for drug-seeking behavior and relapse.
• Understanding the neural circuits involved in memory retrieval of drug-associated cues is critical for developing effective addiction treatments.

Purpose of the Study:

• To identify and characterize the neural circuit involved in the retrieval of methamphetamine (METH)-associated contextual memory.
• To investigate the role of the claustrum (CL) and its connections in METH-conditioned place preference (CPP) acquisition and memory retrieval.

Main Methods:

• Utilized a METH-induced CPP model in male mice.
• Manipulated the ventral tegmental area (VTA)-CL-mPFC circuit and CL neuronal ensembles.
• Assessed the impact on METH CPP acquisition and memory retrieval.

Main Results:

• Disrupting the VTA-CL-mPFC circuit or specific CL neuronal ensembles blocked METH CPP acquisition.
• Dopamine (DA) release and dopamine 1-like receptor (D1R)-mediated CL neuron activation were essential for retrieving METH-induced reward memory.
• The CL plays a key role in linking drug-associated environmental cues to reward memory retrieval.

Conclusions:

• The VTA-CL-mPFC circuit, orchestrated by CL neurons, is vital for retrieving drug-associated environmental cue memory.
• This circuit is a potential therapeutic target for preventing relapse in substance use disorders.
• D1R signaling in the CL is critical for the consolidation and retrieval of drug reward memories.