Prenatal Cannabinoid Exposure Caused Memory Deficits in Adolescent Rats by Disrupting a Key Neural Adhesion Molecule
Prenatal exposure to a synthetic cannabinoid caused hippocampal memory deficits in adolescent rats by reducing PSA-NCAM (a neural adhesion molecule), which shifted glutamate receptor signaling and impaired synaptic plasticity.
Quick Facts
What This Study Found
Prenatal WIN55,212-2 caused hippocampal-dependent memory deficits in adolescent offspring associated with decreased long-term potentiation, enhanced long-term depression, and imbalanced GluN2A/GluN2B signaling. Reduced NCAM and PSA-NCAM expression was identified as the mechanism. Administration of exogenous PSA rescued the LTP deficits, confirming PSA-mediated signaling as the key pathway.
Key Numbers
Decreased LTP and enhanced LTD at Schaffer collateral-CA1 synapses. Imbalanced GluN2A/GluN2B signaling. Reduced NCAM and PSA-NCAM. Exogenous PSA rescued LTP deficits.
How They Did This
Prenatal WIN55,212-2 administered to pregnant rats. Adolescent offspring assessed with behavioral tests, electrophysiology (LTP/LTD at hippocampal synapses), and immunochemistry for adhesion molecules and glutamate receptor subunits. Rescue experiment with exogenous PSA.
Why This Research Matters
This study identifies a specific and potentially rescuable mechanism for prenatal cannabis-related memory deficits. PSA-NCAM is critical for normal brain plasticity, and finding that its reduction drives the memory impairment opens a door to potential interventions.
The Bigger Picture
PSA-NCAM is involved in many aspects of brain development and plasticity beyond memory. Its disruption by prenatal cannabinoids could explain a broader range of neurodevelopmental effects. The rescue experiment suggests therapeutic possibilities, though translating this to humans is a long path.
What This Study Doesn't Tell Us
Synthetic cannabinoid at controlled dose, not comparable to human cannabis use. Rat brain development timeline differs from humans. Rescue was shown for LTP but broader behavioral recovery not tested. Single timepoint assessment.
Questions This Raises
- ?Could PSA-NCAM levels serve as a biomarker for prenatal cannabis exposure effects?
- ?Would postnatal interventions targeting PSA-NCAM restore cognitive function?
Trust & Context
- Key Stat:
- Exogenous PSA rescued memory-related synaptic deficits from prenatal cannabinoid exposure
- Evidence Grade:
- Mechanistic animal study with a rescue experiment, providing strong pathway evidence but limited to rats.
- Study Age:
- Published 2023.
- Original Title:
- Prenatal Cannabinoid Exposure Elicits Memory Deficits Associated with Reduced PSA-NCAM Expression, Altered Glutamatergic Signaling, and Adaptations in Hippocampal Synaptic Plasticity.
- Published In:
- Cells, 12(21) (2023)
- Authors:
- Pinky, Priyanka D(3), Bloemer, Jenna(3), Smith, Warren D(2), Du, Yifeng, Heslin, Ryan T, Setti, Sharay E, Pfitzer, Jeremiah C, Chowdhury, Kawsar, Hong, Hao, Bhattacharya, Subhrajit, Dhanasekaran, Muralikrishnan, Dityatev, Alexander, Reed, Miranda N, Suppiramaniam, Vishnu
- Database ID:
- RTHC-04851
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
How does prenatal cannabis affect memory?
This rat study found prenatal cannabinoid exposure reduces a key neural adhesion molecule (PSA-NCAM), which disrupts glutamate signaling and impairs the brain's ability to form memories.
Can prenatal cannabis memory effects be reversed?
In this study, administering PSA rescued the synaptic plasticity deficits, suggesting the mechanism is potentially targetable. Human applications are far from proven.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-04851APA
Pinky, Priyanka D; Bloemer, Jenna; Smith, Warren D; Du, Yifeng; Heslin, Ryan T; Setti, Sharay E; Pfitzer, Jeremiah C; Chowdhury, Kawsar; Hong, Hao; Bhattacharya, Subhrajit; Dhanasekaran, Muralikrishnan; Dityatev, Alexander; Reed, Miranda N; Suppiramaniam, Vishnu. (2023). Prenatal Cannabinoid Exposure Elicits Memory Deficits Associated with Reduced PSA-NCAM Expression, Altered Glutamatergic Signaling, and Adaptations in Hippocampal Synaptic Plasticity.. Cells, 12(21). https://doi.org/10.3390/cells12212525
MLA
Pinky, Priyanka D, et al. "Prenatal Cannabinoid Exposure Elicits Memory Deficits Associated with Reduced PSA-NCAM Expression, Altered Glutamatergic Signaling, and Adaptations in Hippocampal Synaptic Plasticity.." Cells, 2023. https://doi.org/10.3390/cells12212525
RethinkTHC
RethinkTHC Research Database. "Prenatal Cannabinoid Exposure Elicits Memory Deficits Associ..." RTHC-04851. Retrieved from https://rethinkthc.com/research/pinky-2023-prenatal-cannabinoid-exposure-elicits
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.