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Basolateral Amygdala Drives a GPCR-Mediated Striatal Memory Necessary for Predictive Learning to Influence Choice
Ashleigh K Morse1, Beatrice K Leung1, Emily Heath1
1Decision Neuroscience Laboratory, School of Psychology, University of NSW, Sydney, NSW 2052, Australia.
Neuron
|April 3, 2020
Summary
The basolateral amygdala (BLA) drives delta-opioid receptor (DOPR) accumulation in the nucleus accumbens shell, establishing a memory crucial for later decision-making. This GPCR-based memory, mediated by substance P, guides action selection following predictive learning.
Area of Science:
- Neuroscience
- Behavioral Science
- Molecular Biology
Background:
- Predictive learning significantly impacts instrumental action choices.
- The mechanisms underlying stable memory formation for delayed choices remain unclear.
Purpose of the Study:
- To elucidate how the basolateral amygdala (BLA) encodes predictive learning for future choices.
- To identify the molecular basis of memory formation for delayed action selection.
Main Methods:
- Investigated the role of the basolateral amygdala (BLA) in predictive learning and memory.
- Examined the accumulation of delta-opioid receptors (DOPRs) on cholinergic interneurons in the nucleus accumbens shell (NAc-S).
- Assessed the influence of substance P release from the BLA on DOPR accumulation and subsequent choice behavior.
Main Results:
- The BLA drives delta-opioid receptor (DOPR) accumulation in the nucleus accumbens shell (NAc-S).
- This DOPR accumulation is essential for predictive learning to influence later choices, but not for learning itself.
- Substance P release from the BLA mediates BLA-driven DOPR accumulation in the NAc-S.
Conclusions:
- A novel G-protein coupled receptor (GPCR)-based memory is established by predictive learning.
- This memory, involving DOPR accumulation in the NAc-S, is critical for guiding action selection and execution.
- The BLA-NAc-S pathway, via substance P and DOPRs, provides a mechanism for integrating predictive learning into future behavioral choices.
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