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Iannotti FA. Cannabinoids, Endocannabinoids, and Synthetic Cannabimimetic Molecules in Neuromuscular Disorders. Int J Mol Sci 2023; 25:238. [PMID: 38203407 PMCID: PMC10779239 DOI: 10.3390/ijms25010238] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 12/19/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024] Open
Abstract
Neuromuscular disorders (NMDs) encompass a large heterogeneous group of hereditary and acquired diseases primarily affecting motor neurons, peripheral nerves, and the skeletal muscle system. The symptoms of NMDs may vary depending on the specific condition, but some of the most common ones include muscle weakness, pain, paresthesias, and hyporeflexia, as well as difficulties with swallowing and breathing. NMDs are currently untreatable. Therapeutic options include symptomatic and experimental medications aimed at delaying and alleviating symptoms, in some cases supplemented by surgical and physical interventions. To address this unmet medical need, ongoing research is being conducted on new treatments, including studies on medical cannabis, endocannabinoids, and related molecules with cannabimimetic properties. In this context, a significant amount of knowledge about the safety and effectiveness of cannabinoids in NMDs has been obtained from studies involving patients with multiple sclerosis experiencing pain and spasticity. In recent decades, numerous other preclinical and clinical studies have been conducted to determine the potential benefits of cannabinoids in NMDs. This review article aims to summarize and provide an unbiased point of view on the current knowledge about the use of cannabinoids, endocannabinoids, and synthetic analogs in NMDs, drawing from an array of compelling studies.
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Affiliation(s)
- Fabio Arturo Iannotti
- Institute of Biomolecular Chemistry (ICB), National Research Council of Italy (CNR), 80078 Pozzuoli, NA, Italy
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2
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Ge D, Odierna GL, Phillips WD. Influence of cannabinoids upon nerve-evoked skeletal muscle contraction. Neurosci Lett 2020; 725:134900. [DOI: 10.1016/j.neulet.2020.134900] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/03/2020] [Accepted: 03/06/2020] [Indexed: 02/07/2023]
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Breakdown of phospholipids and the elevated nitric oxide are involved in M3 muscarinic regulation of acetylcholine secretion in the frog motor synapse. Biochem Biophys Res Commun 2020; 524:589-594. [DOI: 10.1016/j.bbrc.2020.01.112] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 01/20/2020] [Indexed: 12/18/2022]
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Gaydukov AE, Dzhalagoniya IZ, Tarasova EO, Balezina OP. The Participation of Endocannabinoid Receptors in the Regulation of Spontaneous Synaptic Activity at Neuromuscular Junctions of Mice. BIOCHEMISTRY MOSCOW SUPPLEMENT SERIES A-MEMBRANE AND CELL BIOLOGY 2020. [DOI: 10.1134/s1990747819060059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Echeverria-Villalobos M, Todeschini AB, Stoicea N, Fiorda-Diaz J, Weaver T, Bergese SD. Perioperative care of cannabis users: A comprehensive review of pharmacological and anesthetic considerations. J Clin Anesth 2019; 57:41-49. [DOI: 10.1016/j.jclinane.2019.03.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 02/16/2019] [Accepted: 03/03/2019] [Indexed: 12/23/2022]
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6
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Onesti E, Frasca V, Ceccanti M, Tartaglia G, Gori MC, Cambieri C, Libonati L, Palma E, Inghilleri M. Short-Term Ultramicronized Palmitoylethanolamide Therapy in Patients with Myasthenia Gravis: a Pilot Study to Possible Future Implications of Treatment. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2019; 18:232-238. [DOI: 10.2174/1871527318666190131121827] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 12/14/2018] [Accepted: 01/21/2019] [Indexed: 12/19/2022]
Abstract
Background: The cannabinoid system may be involved in the humoral mechanisms at the
neuromuscular junction. Ultramicronized-palmitoylethanolamide (μm-PEA) has recently been
shown to reduce the desensitization of Acetylcholine (ACh)-evoked currents in denervated patients
modifying the stability of ACh receptor (AChR) function.
<p>
Objective: To analyze the possible beneficial effects of μm-PEA in patients with myasthenia gravis
(MG) on muscular fatigue and neurophysiological changes.
<p>
Method: The duration of this open pilot study, which included an intra-individual control, was three
weeks. Each patient was assigned to a 1-week treatment period with μm-PEA 600 mg twice a day. A
neurophysiological examination based on repetitive nerve stimulation (RNS) of the masseteric and the
axillary nerves was performed, and the quantitative MG (QMG) score was calculated in 22 MG patients
every week in a three-week follow-up period. AChR antibody titer was investigated to analyze a
possible immunomodulatory effect of PEA in MG patients.
<p>
Results: PEA had a significant effect on the QMG score (p=0.03418) and on RNS of the masseteric
nerve (p=0.01763), thus indicating that PEA reduces the level of disability and decremental muscle response.
Antibody titers did not change significantly after treatment.
<p>
Conclusion: According to our observations, μm-PEA as an add-on therapy could improve muscular
response to fatigue in MG. The possible modulation of AChR currents as a means of eliciting a direct
effect from PEA on the conformation of ACh receptors should be investigated. The co-role of cytokines
also warrants an analysis. Given the rapidity and reversibility of the response, we suppose that
PEA acts directly on AChR, though further studies are needed to confirm this hypothesis.
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Affiliation(s)
- Emanuela Onesti
- Rare Neuromuscular Diseases Centre, Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Vittorio Frasca
- Rare Neuromuscular Diseases Centre, Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Marco Ceccanti
- Rare Neuromuscular Diseases Centre, Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Giorgio Tartaglia
- Rare Neuromuscular Diseases Centre, Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Maria Cristina Gori
- Rare Neuromuscular Diseases Centre, Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Chiara Cambieri
- Rare Neuromuscular Diseases Centre, Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Laura Libonati
- Rare Neuromuscular Diseases Centre, Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Eleonora Palma
- Department of Physiology and Pharmacology, Institute Pasteur- Fondazione Cenci Bolognetti, University of Rome Sapienza, Rome, Italy
| | - Maurizio Inghilleri
- Rare Neuromuscular Diseases Centre, Department of Human Neuroscience, Sapienza University, Rome, Italy
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7
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Genetic and pharmacological regulation of the endocannabinoid CB1 receptor in Duchenne muscular dystrophy. Nat Commun 2018; 9:3950. [PMID: 30262909 PMCID: PMC6160489 DOI: 10.1038/s41467-018-06267-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Accepted: 08/22/2018] [Indexed: 12/14/2022] Open
Abstract
The endocannabinoid system refers to a widespread signaling system and its alteration is implicated in a growing number of human diseases. However, the potential role of endocannabinoids in skeletal muscle disorders remains unknown. Here we report the role of the endocannabinoid CB1 receptors in Duchenne's muscular dystrophy. In murine and human models, CB1 transcripts show the highest degree of expression at disease onset, and then decline overtime. Similar changes are observed for PAX7, a key regulator of muscle stem cells. Bioinformatics and biochemical analysis reveal that PAX7 binds and upregulates the CB1 gene in dystrophic more than in healthy muscles. Rimonabant, an antagonist of CB1, promotes human satellite cell differentiation in vitro, increases the number of regenerated myofibers, and prevents locomotor impairment in dystrophic mice. In conclusion, our study uncovers a PAX7-CB1 cross talk potentially exacerbating DMD and highlights the role of CB1 receptors as target for potential therapies.
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Morsch M, Protti DA, Cheng D, Braet F, Chung RS, Reddel SW, Phillips WD. Cannabinoid-induced increase of quantal size and enhanced neuromuscular transmission. Sci Rep 2018; 8:4685. [PMID: 29549349 PMCID: PMC5856814 DOI: 10.1038/s41598-018-22888-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 03/02/2018] [Indexed: 11/23/2022] Open
Abstract
Cannabinoids exert dynamic control over many physiological processes including memory formation, cognition and pain perception. In the central nervous system endocannabinoids mediate negative feedback of quantal transmitter release following postsynaptic depolarization. The influence of cannabinoids in the peripheral nervous system is less clear and might have broad implications for the therapeutic application of cannabinoids. We report a novel cannabinoid effect upon the mouse neuromuscular synapse: acutely increasing synaptic vesicle volume and raising the quantal amplitudes. In a mouse model of myasthenia gravis the cannabinoid receptor agonist WIN 55,212 reversed fatiguing failure of neuromuscular transmission, suggesting future therapeutic potential. Our data suggest an endogenous pathway by which cannabinoids might help to regulate transmitter release at the neuromuscular junction.
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Affiliation(s)
- Marco Morsch
- Department of Biomedical Sciences, Faculty of Medicine & Health Sciences, Macquarie University, Sydney, NSW, 2109, Australia. .,Discipline of Physiology and Bosch Institute, The University of Sydney, Sydney, NSW, 2006, Australia.
| | - Dario A Protti
- Discipline of Physiology and Bosch Institute, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Delfine Cheng
- School of Medical Sciences (Discipline of Anatomy and Histology), The Bosch Institute, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Filip Braet
- School of Medical Sciences (Discipline of Anatomy and Histology), The Bosch Institute, The University of Sydney, Sydney, NSW, 2006, Australia.,Australian Centre for Microscopy & Microanalysis (ACMM), The University of Sydney, Sydney, NSW, 2006, Australia
| | - Roger S Chung
- Department of Biomedical Sciences, Faculty of Medicine & Health Sciences, Macquarie University, Sydney, NSW, 2109, Australia
| | - Stephen W Reddel
- Departments of Molecular Medicine & Neurology, Concord Clinical School, The University of Sydney, Sydney, NSW, 2006, Australia
| | - William D Phillips
- Discipline of Physiology and Bosch Institute, The University of Sydney, Sydney, NSW, 2006, Australia.
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Trujillo X, Ortiz-Mesina M, Uribe T, Castro E, Montoya-Pérez R, Urzúa Z, Feria-Velasco A, Huerta M. Capsaicin and N-Arachidonoyl-dopamine (NADA) Decrease Tension by Activating Both Cannabinoid and Vanilloid Receptors in Fast Skeletal Muscle Fibers of the Frog. J Membr Biol 2014; 248:31-8. [DOI: 10.1007/s00232-014-9727-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 09/05/2014] [Indexed: 11/30/2022]
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Trujillo X, Sánchez-Pastor E, Andrade F, Huerta M. Presence and colocalization of type-1 cannabinoid receptors with acetylcholine receptors in the motor end-plate of twitch skeletal muscle fibers in the frog. J Membr Biol 2014; 247:1199-205. [PMID: 25161032 DOI: 10.1007/s00232-014-9721-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 08/12/2014] [Indexed: 10/24/2022]
Abstract
Using polyclonal and monoclonal antibodies to visualize under a confocal microscope type-1 cannabinoid receptors (CB1) and acetylcholine (ACh) receptors, respectively, or α-bungarotoxin conjugated to Alexa-Fluor 555 for Ach receptors, we found that they colocalize on twitch muscle fibers in the frog (Rana pipiens). We show that both the CB1 and ACh receptors are present on the fast skeletal muscle motor end-plate. The CB1 receptor is present along the entire membrane of the muscle fiber, whereas the ACh receptor is expressed primarily at the motor end-plate. Analysis of the colocalization produced a cross-correlation coefficient of 0.519 ± 0.021 (n = 9) for both receptors at the muscle motor end-plate. This study suggests a close proximity between these two types of receptor proteins and that they could interact. CB1 could function at some stage of excitation-contraction coupling in these muscle fibers. However, further investigation is needed in order to clarify these issues.
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Affiliation(s)
- Xóchitl Trujillo
- Dr. Enrico Stefani building, Centro Universitario de Investigaciones Biomedicas, Universidad de Colima, Av. 25 de julio No. 965, Col., 28040, Villa San Sebastián, Colima, Mexico
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11
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Sánchez-Pastor E, Andrade F, Sánchez-Pastor JM, Elizalde A, Huerta M, Virgen-Ortiz A, Trujillo X, Rodríguez-Hernández A. Cannabinoid receptor type 1 activation by arachidonylcyclopropylamide in rat aortic rings causes vasorelaxation involving calcium-activated potassium channel subunit alpha-1 and calcium channel, voltage-dependent, L type, alpha 1C subunit. Eur J Pharmacol 2014; 729:100-6. [PMID: 24561046 DOI: 10.1016/j.ejphar.2014.02.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 02/13/2014] [Accepted: 02/14/2014] [Indexed: 01/12/2023]
Abstract
Cannabinoids are key regulators of vascular tone, some of the mechanisms involved include the activation of cannabinoid receptor types 1 and 2 (CB); the transient receptor potential cation channel, subfamily V, member 1 (TRPV1); and non-(CB(1))/non-CB2 receptors. Here, we used the potent, selective CB(1) agonist arachidonylcyclopropylamide (ACPA) to elucidate the mechanism underlying vascular tone regulation. Immunohistochemistry and confocal microscopy revealed that CB(1) was expressed in smooth muscle and endothelial cells in rat aorta. We performed isometric tension recordings in aortic rings that had been pre-contracted with phenylephrine. In these conditions, ACPA caused vasorelaxation in an endothelium-independent manner. To confirm that the effect of ACPA was mediated by CB(1) receptor, we repeated the experiment after blocking these receptors with a selective antagonist, AM281. In these conditions, ACPA did not cause vasorelaxation. We explored the role of K(+) channels in the effect of ACPA by applying high-K(+) solution to induce contraction in aortic rings. In these conditions, the ACPA-induced vasorelaxation was about half that observed with phenylephrine-induced contraction. Thus, K(+) channels were involved in the ACPA effect. Furthermore, the vasorelaxation effect was similarly reduced when we specifically blocked calcium-activated potassium channel subunit alpha-1 (KCa1.1) (MaxiK; BKCa) prior to adding ACPA. Finally, ACPA-induced vasorelaxation was also diminished when we specifically blocked the calcium channel, voltage-dependent, L type, alpha 1C subunit (Ca(v)1.2). These results showed that ACPA activation of CB(1) in smooth muscle caused vasorelaxation of aortic rings through a mechanism involving the activation of K(Ca)1.1 and the inhibition of Ca(v)1.2.
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Affiliation(s)
- E Sánchez-Pastor
- Centro Universitario de Investigaciones Biomédicas, Universidad de Colima, Av. 25 de Julio No. 965, Apdo. Postal No. 11, CP 28040 Colima, Colima, Mexico
| | - F Andrade
- Instituto Tecnológico de Colima, Avenida Tecnológico No. 1, CP 28976 Villa de Álvarez, Colima, Mexico
| | - J M Sánchez-Pastor
- Instituto Tecnológico de Colima, Avenida Tecnológico No. 1, CP 28976 Villa de Álvarez, Colima, Mexico
| | - A Elizalde
- Centro Universitario de Investigaciones Biomédicas, Universidad de Colima, Av. 25 de Julio No. 965, Apdo. Postal No. 11, CP 28040 Colima, Colima, Mexico
| | - M Huerta
- Centro Universitario de Investigaciones Biomédicas, Universidad de Colima, Av. 25 de Julio No. 965, Apdo. Postal No. 11, CP 28040 Colima, Colima, Mexico.
| | - A Virgen-Ortiz
- Departamento de Ciencias Químico Biológicas, División de Ciencias e Ingenierías, Unidad Regional Sur, Campus Navojoa, Universidad de Sonora, Lázaro Cárdenas No. 100, Colonia Francisco Villa, CP 85800 Navojoa, Sonora, Mexico
| | - X Trujillo
- Centro Universitario de Investigaciones Biomédicas, Universidad de Colima, Av. 25 de Julio No. 965, Apdo. Postal No. 11, CP 28040 Colima, Colima, Mexico
| | - A Rodríguez-Hernández
- Facultad de Medicina, Universidad de Colima, Av. Universidad 333, Las Víboras, 28040 Colima, Colima, Mexico
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12
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Etherington SJ, Johnstone VPA, Everett AW. Modulation of synaptic vesicle exocytosis in muscle-dependent long-term depression at the amphibian neuromuscular junction. PLoS One 2014; 9:e87174. [PMID: 24489862 PMCID: PMC3904971 DOI: 10.1371/journal.pone.0087174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 12/20/2013] [Indexed: 11/24/2022] Open
Abstract
We have labeled recycling synaptic vesicles at the somatic Bufo marinus neuromuscular junction with the styryl dye FM2-10 and provide direct evidence for refractoriness of exocytosis associated with a muscle activity-dependent form of long-term depression (LTD) at this synapse. FM2-10 dye unloading experiments demonstrated that the rate of vesicle exocytosis from the release ready pool (RRP) of vesicles was more than halved in the LTD (induced by 20 min of low frequency stimulation). Recovery from LTD, observed as a partial recovery of nerve-evoked muscle twitch amplitude, was accompanied by partial recovery of the refractoriness of RRP exocytosis. Unexpectedly, paired pulse plasticity, another routinely used indicator of presynaptic forms of synaptic plasticity, was unchanged in the LTD. We conclude that the LTD induces refractoriness of the neuromuscular vesicle release machinery downstream of presynaptic calcium entry.
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Affiliation(s)
- Sarah J. Etherington
- School of Biomedical, Biomolecular and Chemical Sciences, The University of Western Australia, Perth, Western Australia, Australia
- School of Veterinary and Life Sciences, Murdoch University, Perth, Western Australia, Australia
- * E-mail:
| | - Victoria P. A. Johnstone
- School of Biomedical, Biomolecular and Chemical Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Alan W. Everett
- School of Biomedical, Biomolecular and Chemical Sciences, The University of Western Australia, Perth, Western Australia, Australia
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Effects of Cannabinoids on Tension Induced by Acetylcholine and Choline in Slow Skeletal Muscle Fibers of the Frog. J Membr Biol 2013; 247:57-62. [DOI: 10.1007/s00232-013-9610-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 10/14/2013] [Indexed: 10/26/2022]
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Lindgren CA, Newman ZL, Morford JJ, Ryan SB, Battani KA, Su Z. Cyclooxygenase-2, prostaglandin E2 glycerol ester and nitric oxide are involved in muscarine-induced presynaptic enhancement at the vertebrate neuromuscular junction. J Physiol 2013; 591:4749-64. [PMID: 23818695 DOI: 10.1113/jphysiol.2013.256727] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Previous work has demonstrated that activation of muscarinic acetylcholine receptors at the lizard neuromuscular junction (NMJ) induces a biphasic modulation of evoked neurotransmitter release: an initial depression followed by a delayed enhancement. The depression is mediated by the release of the endocannabinoid 2-arachidonylglycerol (2-AG) from the muscle and its binding to cannabinoid type 1 receptors on the motor nerve terminal. The work presented here suggests that the delayed enhancement of neurotransmitter release is mediated by cyclooxygenase-2 (COX-2) as it converts 2-AG to the glycerol ester of prostaglandin E2 (PGE2-G). Using immunofluorescence, COX-2 was detected in the perisynaptic Schwann cells (PSCs) surrounding the NMJ. Pretreatment with either of the selective COX-2 inhibitors, nimesulide or DuP 697, prevents the delayed increase in endplate potential (EPP) amplitude normally produced by muscarine. In keeping with its putative role as a mediator of the delayed muscarinic effect, PGE2-G enhances evoked neurotransmitter release. Specifically, PGE2-G increases the amplitude of EPPs without altering that of spontaneous miniature EPPs. As shown previously for the muscarinic effect, the enhancement of evoked neurotransmitter release by PGE2-G depends on nitric oxide (NO) as the response is abolished by application of either N(G)-nitro-l-arginine methyl ester (l-NAME), an inhibitor of NO synthesis, or carboxy-PTIO, a chelator of NO. Intriguingly, the enhancement is not prevented by AH6809, a prostaglandin receptor antagonist, but is blocked by capsazepine, a TRPV1 and TRPM8 receptor antagonist. Taken together, these results suggest that the conversion of 2-AG to PGE2-G by COX-2 underlies the muscarine-induced enhancement of neurotransmitter release at the vertebrate NMJ.
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Affiliation(s)
- Clark A Lindgren
- C. A. Lindgren: Grinnell College, Department of Biology, 1116 8th Ave., Grinnell College, Grinnell, IA 50112, USA.
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Nurullin LF, Tsentsevitsky AN, Malomouzh AI, Nikolsky EE. Revealing of T-type low-voltage activated calcium channels (CaV3) in frog neuromuscular junctions. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2013; 449:73-5. [PMID: 23652430 DOI: 10.1134/s0012496613020038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Indexed: 11/23/2022]
Affiliation(s)
- L F Nurullin
- Kazan Institute of Biochemistry and Biophysics, Russian Academy of Sciences, Kazan, 420111 Tatarstan, Russia
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16
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Opposing effects of cannabinoids and vanilloids on evoked quantal release at the frog neuromuscular junction. Neurosci Lett 2010; 473:97-101. [DOI: 10.1016/j.neulet.2010.02.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2009] [Revised: 01/26/2010] [Accepted: 02/11/2010] [Indexed: 11/17/2022]
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17
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Effects of cannabinoids on caffeine contractures in slow and fast skeletal muscle fibers of the frog. J Membr Biol 2009; 229:91-9. [PMID: 19506935 PMCID: PMC2697372 DOI: 10.1007/s00232-009-9174-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2008] [Accepted: 05/08/2009] [Indexed: 01/27/2023]
Abstract
The effect of cannabinoids on caffeine contractures was investigated in slow and fast skeletal muscle fibers using isometric tension recording. In slow muscle fibers, WIN 55,212-2 (10 and 5 μM) caused a decrease in tension. These doses reduced maximum tension to 67.43 ± 8.07% (P = 0.02, n = 5) and 79.4 ± 14.11% (P = 0.007, n = 5) compared to control, respectively. Tension-time integral was reduced to 58.37 ± 7.17% and 75.10 ± 3.60% (P = 0.002, n = 5), respectively. Using the CB1 cannabinoid receptor agonist ACPA (1 μM) reduced the maximum tension of caffeine contractures by 68.70 ± 11.63% (P = 0.01, n = 5); tension-time integral was reduced by 66.82 ± 6.89% (P = 0.02, n = 5) compared to controls. When the CB1 receptor antagonist AM281 was coapplied with ACPA, it reversed the effect of ACPA on caffeine-evoked tension. In slow and fast muscle fibers incubated with the pertussis toxin, ACPA had no effect on tension evoked by caffeine. In fast muscle fibers, ACPA (1 μM) also decreased tension; the maximum tension was reduced by 56.48 ± 3.4% (P = 0.001, n = 4), and tension-time integral was reduced by 57.81 ± 2.6% (P = 0.006, n = 4). This ACPA effect was not statistically significant with respect to the reduction in tension in slow muscle fibers. Moreover, we detected the presence of mRNA for the cannabinoid CB1 receptor on fast and slow skeletal muscle fibers, which was significantly higher in fast compared to slow muscle fiber expression. In conclusion, our results suggest that in the slow and fast muscle fibers of the frog cannabinoids diminish caffeine-evoked tension through a receptor-mediated mechanism.
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Expression of the endocannabinoid system in fibroblasts and myofascial tissues. J Bodyw Mov Ther 2008; 12:169-82. [PMID: 19083670 DOI: 10.1016/j.jbmt.2008.01.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2007] [Revised: 12/29/2007] [Accepted: 01/08/2008] [Indexed: 12/17/2022]
Abstract
The endocannabinoid (eCB) system, like the better-known endorphin system, consists of cell membrane receptors, endogenous ligands and ligand-metabolizing enzymes. Two cannabinoid receptors are known: CB(1) is principally located in the nervous system, whereas CB(2) is primarily associated with the immune system. Two eCB ligands, anandamide (AEA) and 2-arachidonoylglycerol (2-AG), are mimicked by cannabis plant compounds. The first purpose of this paper was to review the eCB system in detail, highlighting aspects of interest to bodyworkers, especially eCB modulation of pain and inflammation. Evidence suggests the eCB system may help resolve myofascial trigger points and relieve symptoms of fibromyalgia. However, expression of the eCB system in myofascial tissues has not been established. The second purpose of this paper was to investigate the eCB system in fibroblasts and other fascia-related cells. The investigation used a bioinformatics approach, obtaining microarray data via the GEO database (www.ncbi.nlm.nih.gov/geo/). GEO data mining revealed that fibroblasts, myofibroblasts, chondrocytes and synoviocytes expressed CB(1), CB(2) and eCB ligand-metabolizing enzymes. Fibroblast CB(1) levels nearly equalled levels expressed by adipocytes. CB(1) levels upregulated after exposure to inflammatory cytokines and equiaxial stretching of fibroblasts. The eCB system affects fibroblast remodeling through lipid rafts associated with focal adhesions and dampens cartilage destruction by decreasing fibroblast-secreted metalloproteinase enzymes. In conclusion, the eCB system helps shape biodynamic embryological development, diminishes nociception and pain, reduces inflammation in myofascial tissues and plays a role in fascial reorganization. Practitioners wield several tools that upregulate eCB activity, including myofascial manipulation, diet and lifestyle modifications, and pharmaceutical approaches.
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