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CREB regulates memory allocation in the insular cortex.

Yoshitake Sano1, Justin L Shobe1, Miou Zhou1

  • 1Departments of Neurobiology, Psychiatry and Biobehavioral Sciences, Psychology, Integrative Center for Learning and Memory and Brain Research Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA.

Current Biology : CB
|December 3, 2014
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Summary
This summary is machine-generated.

Cyclic-AMP-response-element-binding protein (CREB) levels dictate which insular cortex neurons store conditioned taste aversion memories. This finding reveals a specific mechanism for memory allocation beyond the amygdala.

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Area of Science:

  • Neuroscience
  • Cellular Biology
  • Molecular Biology

Background:

  • Memory storage mechanisms are well-studied, but memory allocation remains unclear.
  • Previous research linked higher cyclic-AMP-response-element-binding protein (CREB) levels to fear memory allocation in the amygdala.
  • The insular cortex is crucial for conditioned taste aversion (CTA) memory, interacting with the amygdala during formation.

Purpose of the Study:

  • To investigate if specific mechanisms regulate memory allocation in the insular cortex.
  • To determine the role of CREB in insular cortical memory allocation for CTA.
  • To explore if CREB's role in memory allocation extends beyond the amygdala.

Main Methods:

  • Utilized viral vector transfections in the insular cortex.
  • Employed arc fluorescence in situ hybridization (FISH) to assess neuronal activity.
  • Applied the designer receptors exclusively activated by designer drugs (DREADD) system to manipulate neuronal activity.

Main Results:

  • Demonstrated that CREB levels are a key determinant of insular cortical neuron recruitment for CTA memory.
  • Showed that CREB influences which specific neurons within the insular cortex encode the conditioned taste memory.
  • Provided evidence for a conserved mechanism of memory allocation involving CREB across different brain regions.

Conclusions:

  • CREB levels play a critical role in regulating memory allocation within the insular cortex.
  • This study identifies a specific molecular mechanism governing the selection of neurons for memory storage in CTA.
  • Findings suggest that CREB-mediated memory allocation is a general principle applicable to different memory types and brain structures.