ArticleProceedings of the National Academy of Sciences of the United States of America2008
GPR55 is a cannabinoid receptor that increases intracellular calcium and inhibits M current.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 353 papers, 3 of them syntheses that pooled it.
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
353 citing papers in PubMed, 3 syntheses or guidelines pooled it, 695 citations in OpenAlex.
- Classical cannabinoid receptors as target in cancer-induced bone pain: a systematic review, meta-analysis and bioinformatics validation.Scientific reports · 2024Pooled it
- Effect of recreational cannabis use on bone mineral density: a systematic review.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2024Pooled it
- Endocannabinoid System as a Promising Therapeutic Target in Inflammatory Bowel Disease - A Systematic Review.Frontiers in immunology · 2021Pooled it
- Transcriptional and epigenetic regulation of the cannabinoid receptor type-1 (CB1R) in health and disease: an overview.Pharmacological reports : PR · 2026Review
- The Potential of Cannabidiol for the Treatment of Psychosis: Endocannabinoid Regulation of Serotonergic Neurotransmission via Serotonin 5-HT1A/2A Receptors.Neurochemical research · 2026Review
- ΔJournal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2026Article
- LPC18:0 Secreted by Exogenous Neural Stem Cells Potentiates Neurogenesis and Functional Recovery via GPR55-Mediated Signalling in Spinal Cord Injury.Cell proliferation · 2026Article
- Minor cannabinoids CBD, CBG, CBN, and CBC differentially modulate sensory neuron activation.The Journal of pharmacology and experimental therapeutics · 2026Article
- Integrative network analysis reveals organizational principles of the endocannabinoid system.Journal of cannabis research · 2026Article
- Cannabidiol and other non-psychotropic cannabinoids from Cannabis sativa as therapeutics for microglial-mediated neuroinflammation and neurodegeneration.Journal of cannabis research · 2026Review
- Regulation of Cholesterol and Triglyceride Metabolism by Fatty acid Ethanolamides.Current atherosclerosis reports · 2026Review
- Astrocytic GPR55 receptors promote glycolysis.Journal of cannabis research · 2026Article
- The Pro- But Not Antinociceptive Effects of Cannabidiol Depend on Trpa1b in Larval Zebrafish.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2026Article
- Orphan GPCRs in diabetes mellitus: metabolic control, inflammation, and drug development.Frontiers in endocrinology · 2026Review
- Integrated lipidomic and transcriptomic profiling of imiquimod-induced psoriasiform dermatitis.Frontiers in cell and developmental biology · 2026Article
- Depression of synaptic outputs by reduction of CaFrontiers in molecular neuroscience · 2026Article
- Elucidating the transcriptomic response of adult-derived mHypoA-2/12 mouse hypothalamic neuron cell line to cannabidiol (CBD) exposure.Journal of applied genetics · 2025Article
- The pro-, but not anti-nociceptive effects of Cannabidiol depend on Trpa1b in larval Zebrafish.bioRxiv : the preprint server for biology · 2025Article
- Minor Cannabinoids CBD, CBG, CBN and CBC differentially modulate sensory neuron activation.bioRxiv : the preprint server for biology · 2025Article
- GPR55 senses lactate to sustain motility in prostate cancer cells.Molecular and cellular biochemistry · 2025Article
293 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 3 institutions in 1 country.
Funding
Abstract
The CB(1) cannabinoid receptor mediates many of the psychoactive effects of Delta(9)THC, the principal active component of cannabis. However, ample evidence suggests that additional non-CB(1)/CB(2) receptors may contribute to the behavioral, vascular, and immunological actions of Delta(9)THC and endogenous cannabinoids. Here, we provide further evidence that GPR55, a G protein-coupled receptor, is a cannabinoid receptor. GPR55 is highly expressed in large dorsal root ganglion neurons and, upon activation by various cannabinoids (Delta(9)THC, the anandamide analog methanandamide, and JWH015) increases intracellular calcium in these neurons. Examination of its signaling pathway in HEK293 cells transiently expressing GPR55 found the calcium increase to involve G(q), G(12), RhoA, actin, phospholipase C, and calcium release from IP(3)R-gated stores. GPR55 activation also inhibits M current. These results establish GPR55 as a cannabinoid receptor with signaling distinct from CB(1) and CB(2).
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.