Related Experiment Video
Updated: Jan 17, 2026
03:43
Oromucosal as an Alternative Method for Administration of Cannabis Products in Rodents
Published on: August 22, 2025
377
Cannabinoid CB1 Receptor Activation Mitigates N‑Methyl‑d‑aspartate Receptor-Mediated Neurotoxicity
Gemma Navarro1,2,3, Iu Raïch1,2,3, Joan Biel Rebassa1,2,3
1Centro de Investigación Biomédica en Red Enfermedades Neurodegenerativas (CiberNed), National Institute of Health Carlos III, 28031 Madrid, Spain.
ACS Pharmacology & Translational Science
|September 19, 2025
Summary
This study reveals a direct interaction between cannabinoid CB1 receptors and NMDA receptors, crucial for Alzheimer's disease pathology. Modulating this interaction offers neuroprotection against excitotoxicity and Aβ-induced damage.
Area of Science:
- Neuroscience
- Molecular Biology
- Pharmacology
Background:
- Alzheimer's disease (AD) involves synaptic dysfunction and excitotoxicity.
- Cannabinoid CB1 receptors (CB1Rs) and NMDA receptors (NMDARs) are implicated in AD.
- Limited therapeutic strategies exist for AD.
Purpose of the Study:
- To investigate the functional and physical interplay between CB1Rs and NMDARs.
- To explore the role of CB1R-NMDAR interactions in AD pathology.
- To assess the therapeutic potential of modulating CB1R-NMDAR interactions.
Main Methods:
- Bioluminescence resonance energy transfer (BRET) and imaging assays in HEK-293T cells.
- Functional assays measuring cAMP inhibition, calcium influx, and MAPK signaling.
- Analysis of receptor expression in neurons, microglia, and AD model mice.
Main Results:
- Direct physical interaction demonstrated between CB1R and NMDAR subunit N1, forming receptor complexes.
- Bidirectional negative crosstalk observed: NMDA attenuates CB1R activity, and CB1R activation reduces NMDAR signaling.
- CB1R-NMDAR complexes are upregulated in AD models and by Aβ, but functional modulation varies.
- CB1R activation confers neuroprotection, rescuing neurite loss induced by NMDA and Aβ.
Conclusions:
- CB1R-NMDAR interactions dynamically modulate excitotoxic and inflammatory signaling.
- These interactions present therapeutic prospects for Alzheimer's disease.
- Targeting cannabinoid-glutamatergic interactions may offer novel treatment strategies.
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