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15 protocols using cid16020046

1

Pharmacological Modulation of Hippocampal Function

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The following drugs were used during behavioral and/or in vivo electrophysiological experiments: the GPR55 endogenous lipid agonist PEA (0.5 or 1 μg/0.5 μL; Tocris Bioscience), selective GPR55 antagonist CID 16020046 (CID160; 1 μg/0.5 μL; Tocris Bioscience), selective CB1R antagonist Rimonabant (RIM; 0.5 μg/0.5 μL; Tocris Bioscience), selective PPARα antagonist GW 6471 (GW; 10 or 100 ng/0.5 μL; Tocris Bioscience), and selective and noncompetitive NMDA receptor antagonist MK 801 (MK801; 1 μg/0.5 μL; Tocris Bioscience). All pharmacological compounds were dissolved in dimethyl sulfoxide (DMSO) and then diluted in phosphate-buffered saline (PBS) for a final 15% DMSO in PBS solution. Intra-vHipp microinfusions were performed immediately before the start of each behavioral experiment. A total volume of 0.5 μL per side was delivered via a 28-gauge microinfusion injector over a period of 1 min following drug infusion to ensure adequate diffusion from the tip.
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2

Pharmacological Treatment of Obese Pre-Diabetic Mice

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LH-21 was purchased from Cayman (Cayman Chemical, Ann Harbor, MI), dissolved in 100% ethanol and stored in 30 mg/ml aliquots. For daily injections, fresh dilutions were prepared in vehicle (5% Tween 80 in saline; final ethanol concentration 1%). Either vehicle or LH-21 were i.p. injected daily for two weeks in the obese pre-diabetic mice that had been fed a HFD for 15 weeks. An effective dosage of 3 mg/Kgday−1 LH-21 was used to treat animals as previously described12 (link). For the pharmacological experiments in naïve healthy mice LH-21 was prepared and administered as above. CID16020046 was purchased from Tocris (Tocris Bioscience, Bristol, UK), dissolved in 100% DMSO and stored in 30 mg/ml aliquots. In the experiments, CID16020046 was dissolved in saline and i.p. injected 15 min before LH-21 injections.
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3

Endocannabinoid Modulation of ECFC Growth

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Three different ECFC donors were seeded in 6-well plates (Nalge Nunc, Rochester, NY) in EGM-2 at a density of 3,000 c/cm2 and allowed to adhere for 24 hours. Subsequently, cells were subjected to growth factor reduced medium with or without AEA and different endocannabinoid receptor agonists and antagonists as indicated. The substances anandamide, CID16020046, SB366791 and Capsaicin were obtained by Tocris Bioscience (Northpoint, Avonmouth, Bristol, UK). SKM4-45-1, AM251, SR144528 (Cayman Chemical Europe, Tallinn, Estonia). After 48 hours treatment cells were harvested and cell numbers analyzed by a Casy cell counter (Roche, Mannheim, Germany).
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4

Cannabinoids and Anticonvulsant Drugs

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CBDV, CBG and Δ9‐THCV were purchased from THC Pharm GmbH (Frankfurt, Germany). CBGA was purchased from THC Pharm GmbH and Epichem (Bentley, Australia). CBGV was purchased from Toronto Research Chemicals Inc. (Ontario, Canada). CBDVA and CBGVA were synthesized by Professor Michael Kassiou at the University of Sydney (Australia). Clobazam and valproic acid were purchased from Sigma‐Aldrich Co. (St. Louis, USA). When available, analytical standards were purchased from Novachem Pty Ltd (Heidelberg West, Australia). For in vitro experiments, drugs were prepared as stocks in DMSO. For acute administration, drugs were prepared fresh on the day of the experiment. CBDV, CBG, CBGV and Δ9‐THCV were prepared in ethanol:Tween 80:saline (1:1:18). CBGV (100 mg·kg−1) was a suspension, with CBDV (60 mg·kg−1) and CBG (30 mg·kg−1) near solubility limits. CBDVA, CBGA, CBGVA and Clobazam were prepared as solutions in vegetable oil. Drugs were administered as an intraperitoneal injection in a volume of 10 ml·kg−1. ML‐186 was purchased from Enamine (Kyiv, Ukraine). CID16020046 and lysophosphatidylinositol were purchased from Tocris Biosciences (Bristol, United Kingdom) and Sigma‐Aldrich (St. Louis, USA).
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5

Investigating CBD's Modulation of Cocaine Effects

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Cocaine hydrochloride (provided by NIDA Pharmacy) was dissolved in 0.9% saline. Cannabidiol (provided by NIDA Research Resources Drug Supply Program) was dissolved in 5% cremophor. AM251 (CB1R antagonist; 3 mg/kg), AM630 (CB2R antagonist; 3 mg/kg), CID16020046 (GPR55 antagonist; 3 and 5 mg/kg), capsazepine (TRPV1 antagonist, 3 and 5 mg/kg) were purchased from Tocris and dissolved in 5% cremophor. Naloxone (MOR antagonist; 3 mg/kg) and WAY100135 (5-HT1A antagonist; 3 mg/kg) were dissolved in 0.9% saline. All compounds were administered intraperitoneally (i.p.) in the volume of 1 ml/kg. The doses of CBD and antagonists and the intraperitoneal route of administration are based on previous reports (Bi et al., 2019 (link); Hay et al., 2018 (link); Ren et al., 2009 (link); Spiller et al., 2019 (link)), our pilot studies, and the pharmacokinetics of CBD, assessed after i.p. administration.
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6

Endothelial Cell Functional Assay with LPI

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ECFCs from three different cord blood donors, HUVECs and peripheral blood ECFC were seeded in 24-well plates (Nalge Nunc, Rochester, NY, USA) in EGM-2 at a density of 3000 cells/cm2 and allowed to adhere for 24 h. Subsequently, cells were subjected to growth factor-reduced medium [EBM-2 (Lonza) containing 2% FBS and 1% penicillin/streptomycin/L-glutamine/heparin (Life Technologies) without the addition of EGM-2 growth factor supplements] with or without different concentrations of LPI (Sigma) and/or endocannabinoid receptor antagonists: CID16020046 (Tocris Bioscience, Northpoint, Avonmouth, Bristol, UK) and AM251, SR144528 (both Cayman Chemical Europe, Tallinn, Estonia). A 30 min treatment with 10 μM U0126 (Cell Signaling, Cambridge, UK) was also tested. After 48 h, treated cells were harvested and the cell number was counted by a Casy cell counter (Roche, Mannheim, Germany). Nine independent experiments per group were performed in triplicate.
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7

Synthesis and Administration of CBGA Methyl Ester

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CBGA methyl ester was synthesized by Acme Bioscience, Inc (Palo Alto, USA), with > 98% purity. Olivetolic acid was purchased from Toronto Research Chemicals Inc. (North York, CAN), with >97% purity. Compounds were prepared fresh on the day of the experiment as solutions in ethanol:Tween80:saline (1:1:18) and administered as an intraperitoneal (i.p.) injection in a volume of 10 mL/kg. CID16020046 and NNC 55-0396 were purchased from Tocris Biosciences (Bristol, GBR) and Cayman Chemical (Ann Arbor, USA), respectively. Lysophosphatidylinositol (LPI) was purchased from Sigma-Aldrich (St. Louis, USA).
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8

Cannabinoid Receptor Ligand Preparation

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CBG and CBDV were kindly gifted by STI pharmaceuticals. Both compounds were dissolved in 100% ethanol to 10 mM and were stored at −20°C. AM251, AM630, GW6471, GW9962, O1918, CID16020046, SB366791 (Tocris, United Kingdom) were dissolved in dimethyl sulfoxide as stock solutions of 10 mM. (S)-WAY100135 was dissolved in deionized water. Antagonists were stored at −20°C and dilutions were made fresh as required.
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9

Pharmacological Modulation of GPR55 and GPR119

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2-[[2-(4-Bromophenyl)-6-methyl-4-pyrimidinyl]amino]ethanol (AS1269574), 5-Methyl-4-[(1R,6R)-3-methyl-6-(1-methylethenyl)-2-cyclohexen-1-yl]-1,3-benzenediol (O1602), 4-[4,6-Dihydro-4-(3-hydroxyphenyl)-3-(4-methylphenyl)-6-oxopyrrolo[3,4-c]pyrazol-5(1H)-yl]benzoic acid (CID16020046) and G-protein antagonist peptide were purchased from Tocris Bioscience (Bristol, UK). All drugs were freshly suspended before each experiment in normal saline solution containing 10% of Tween 20. Drugs were selected based on their commercial availability as well as for their selectivity for GPR55 and GPR119 receptors. AS1269574 is a selective GPR119 agonist with a pEC50 = 5.6 [43 (link)], O1602 is a GPR55 agonist with a pEC50 = 7.9–8.9 [44 (link)], CID16020046 is a selective GPR55 antagonist with a pA2 = 7.3 [22 (link)] and G-protein antagonist peptide is a blocker of the activation of G proteins by receptors [33 (link)]. The drug doses were chosen from pilot experiments under our conditions.
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10

Investigating Immune Cell Signaling Pathways

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O-1602 and CID16020046 were purchased from Tocris Bioscience (Ellisville, MO, USA). R-phycoerythrin (PE)-conjugated mouse anti-human Mac-1 (clone ICRF44; BD) antibody (Cat No. 555388) and PE-conjugated mouse IgG isotype control (clone MOPC-21) antibody (Cat No. 555749) were obtained from BD Biosciences (San Diego, CA, USA). Various signal pathway inhibitors were purchased from EMD Serono (Rockland, MA, USA) and Sigma-Aldrich (St. Louis, MO, USA).
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