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Cortical dopamine D5 receptors regulate neuronal circuit oscillatory activity and memory in rats

Albeely, Abdalla M. ; Nolan, Caitlin J. ; Rasmussen, Duncan J. ; Bailey, Craig D. C. ; Perreault, Melissa L.

CNS neuroscience & therapeutics, 2023-09, Vol.29 (9), p.2469-2480 [Peer Reviewed Journal]

England: John Wiley & Sons, Inc

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  • Title:
    Cortical dopamine D5 receptors regulate neuronal circuit oscillatory activity and memory in rats
  • Author: Albeely, Abdalla M. ; Nolan, Caitlin J. ; Rasmussen, Duncan J. ; Bailey, Craig D. C. ; Perreault, Melissa L.
  • Subjects: Animal cognition ; Cognitive ability ; Dopamine ; Dopamine D5 receptor ; Dopamine D5 receptors ; Electrophysiological recording ; Glycogen ; Glycogen synthase kinase 3 ; Kinases ; Learning ; Memory ; neuronal oscillations ; Original ; Pattern recognition ; prefrontal cortex ; recognition memory ; spatial memory ; Surgery ; Thalamus ; Therapeutic targets
  • Is Part Of: CNS neuroscience & therapeutics, 2023-09, Vol.29 (9), p.2469-2480
  • Notes: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Description: Introduction The dopamine D5 receptor (D5R) shows high expression in cortical regions, yet the role of the receptor in learning and memory remains poorly understood. This study evaluated the impact of prefrontal cortical (PFC) D5R knockdown in rats on learning and memory and assessed the role of the D5R in the regulation of neuronal oscillatory activity and glycogen synthase kinase‐3 (GSK‐3β), processes integral to cognitive function. Materials and Methods Using an adeno‐associated viral (AAV) vector, male rats were infused with shRNA to the D5R bilaterally into the PFC. Local field potential recordings were taken from freely moving animals and spectral power and coherence were evaluated in, and between, the PFC, orbitofrontal cortex (OFC), hippocampus (HIP), and thalamus. Animals were then assessed in object recognition, object location, and object in place tasks. The activity of PFC GSK‐3β, a downstream effector of the D5R, was evaluated. Results AAV‐mediated knockdown of the D5R in the PFC induced learning and memory deficits. These changes were accompanied by elevations in PFC, OFC, and HIP theta spectral power and PFC‐OFC coherence, reduced PFC‐thalamus gamma coherence, and increased PFC GSK‐3β activity. Conclusion This work demonstrates a role for PFC D5Rs in the regulation of neuronal oscillatory activity and learning and memory. As elevated GSK‐3β activity has been implicated in numerous disorders of cognitive dysfunction, this work also highlights the potential of the D5R as a novel therapeutic target via suppression of GSK‐3β. Reducing levels of the dopamine D5 receptor (D5R) in the prefrontal cortex (PFC) of rats altered brain wave patterns and increased activity of the protein GSK‐3, two processes tightly linked to learning and memory. D5R knockdown also induced memory deficits in a number of behavioral tasks.
  • Publisher: England: John Wiley & Sons, Inc
  • Language: English
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