ArticleBioinformatics and biology insights2026
Computational Characterization of Nabilone-Induced Disruption of the CB2-HER2 Receptor Complex in HER2+ Breast Cancer.
Article in Bioinformatics and biology insights, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Human epidermal growth factor receptor 2-positive (HER2+) breast cancer, accounting for 15% to 20% of cases, is often resistant to treatment. Delta-9-tetrahydrocannabinol (THC) disrupts HER2-cannabinoid receptor (2CB2) receptor complexes and inhibits HER2 activation. This study evaluates whether Nabilone, a synthetic cannabinoid, can similarly disrupt HER2-CB2 interactions. A CB2-HER2 complex model was generated via protein-protein docking. Three 1-µs molecular dynamics simulations (CB2-HER2, CB2-HER2-THC, CB2-HER2-Nabilone) were performed using the Schrodinger Desmond with membrane embedding and solvent. Structural stability (root mean square deviation [RMSD] and root mean square fluctuation [RMSF]), binding free energy (molecular mechanics/generalized born surface area [MM/GBSA]), and intracellular/extracellular distances between receptors were analyzed. Intermolecular interactions were assessed using the MAPIYA server. Nabilone induced comparable structural instability to THC, with increased RMSD and RMSF. The MM/GBSA analysis showed Nabilone increased the binding free energy between CB2 and HER2, indicating stronger disruption. Intracellular and extracellular distances between CB2 and HER2 increased, especially intracellularly, with Nabilone. Intermolecular interaction analysis revealed that Nabilone decreased the number of contacts, particularly hydrophobic interactions, between CB2 and HER2. Our in silico model predicts that Nabilone may disrupt the HER2-CB2 complex, suggesting a hypothesis that it could serve as a potential therapeutic agent. These computational findings warrant urgent experimental validation.
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