AM1241

Catalog No.S1544 Batch:S154402

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Technical Data

Formula

C22H22IN3O3

Molecular Weight 503.33 CAS No. 444912-48-5
Solubility (25°C)* In vitro DMSO 100 mg/mL (198.67 mM)
Water Insoluble
Ethanol Insoluble
In vivo (Add solvents to the product individually and in order)
Clear solution
5%DMSO 40%PEG300 5%Tween80 50%ddH2O
5.0mg/ml Taking the 1 mL working solution as an example, add 50 μL of 100 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results. 
Clear solution
5% DMSO 95% Corn oil
0.8mg/ml Taking the 1 mL working solution as an example, add 50 μL of 16 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results. 
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description AM-1241 is a selective cannabinoid CB2 receptor agonist with Ki of 3.4 nM, exhibits 82-fold selectivity over CB1 receptor.
Targets
CB2 [1] CB1 [1]
3.4 nM(Ki) 280 nM(Ki)
In vitro AM-1241 is a protean agonist of CB2 based on the different effect observed in various assays (calcium influx, extracellular signal-regulated kinase (ERK) phosphorylatin and cAMP measurement)) and on the switch from neutral antagonism to agonism in the cAMP assay when forskolin concentration is lowered. In [3H]CP 55,940 competition binding assays, AM-1241 displays high affinity at the human CB2 receptor with a Ki value of about 7 nM, whereas its affinity at the human CB1 receptor is more than 80-fold weaker, using membrane preparations from stable HEK and CHO cell lines expressing the recombinant human CB2 and CB1 receptors, respectively. [2]
In vivo AM-1241 dose-dependently reverses tactile and thermal hypersensitivity produced by ligation of the L5 and L6 spinal nerves in rats. AM-1241 is also active in blocking spinal nerve ligation-induced tactile and thermal hypersensitivity in mice lacking CB1 receptors (CB1-/- mice), confirming that AM-1241 reverses sensory hypersensitivity independent of actions at CB1 receptors.[1] AM-1241 (100, 330 μg/kg i.p.) suppresses the development of carrageenan-evoked thermal and mechanical hyperalgesia and allodynia. And this suppression is blocked by CB2 antagonist SR144528 but not by CB1 antagonist SR141716A. [3] AM1241 produces dose-dependent antinociception to a thermal stimulus applied to the hindpaw, when administered into the hindpaw on the side of testing (ipsilateral i. paw), while much less active into the contralateral to the side. A50 (analgesic dose yielding a 50% effect) of AM1241 is 847 μg/kg with the maximum possible effect (100% MPE) being achieved at 3.3 mg/kg. AM1241 also produces dose-dependent antinociception when administered intraperitoneally (i.p.), with an A50 of 103μg/kg. The antinociceptive actions of AM1241 are blocked by the CB2 receptor-selective antagonist AM630, but not by the CB1 receptor-selective antagonist AM251. AM1241 dosn't produce the CNS cannabinoid effects of hypothermia, catalepsy, inhibition of activity or impaired ambulation, while this tetrad of effects is produced by the mixed CB1/CB2 receptor agonist WIN55,212-2.[4] Daily injections of AM-1241 through a i.p. route, initiated at symptom onset, increases the survival interval after amyotrophic lateral sclerosis (ALS) onset by 56% in a transgenic mouse model of ALS. [5]

Protocol (from reference)

Kinase Assay:[1]
  • Binding Assays

    Binding to cannabinoid receptors is tested by using competition-equilibrium binding vs. [3H]CP55,940. AM-1241 is diluted into 25 mM Tris base (pH 7.4)/5 mM MgCl2/1 mM EDTA/0.1% essentially fatty acid-free BSA and transferred to Regisil-treated 96-well plates. [3H]CP55,940 (DuPont_NEN; specific activity 100–180 Ci/ mmol; 1 Ci =37 GBq) is added to a concentration of 0.8 nM. Membranes prepared from rat brain (containing CB1 receptors) or mouse spleen (containing CB2 receptors) are added (≈50 μg of membrane protein per well), plates are incubated at 30 °C for 1 hour, and the contents are filtered over Packard Unifilter GF/B 96-well filters by using a Packard Filtermate 196 cell harvester. Filters are washed with ice-cold 50 mM Tris base/5 mM MgCl2/0.5% BSA and dried. Bound radioactivity is quantitated and corrected for nonspecific binding, and results are normalized between 0% and 100% [3H]CP-55,940 specifically bound. IC50 is determined by nonlinear regression analysis using GraphPad PRISM and transformed to a Ki value. All data are collected in duplicate. IC50 and Ki values are determined from three independent experiments.

Cell Assay:[2]
  • Cell lines

    HEK cells and CHO cell lines stably express human CB2 receptor and CB1 receptor.

  • Concentrations

    12 concentrations between 0.1 nM–10 μM

  • Incubation Time

    90 minutes

  • Method

    Membrane samples are prepared from HEK cells stably expressing the human CB2 receptors previously generated (Mukherjee et al., 2004), or the CHO cell line that stably expresses the human CB1 receptor. Radioligand binding assays are performed as following. Briefly, the cells are harvested and homogenized using a Polytron for 2 × 10 s bursts in a buffer containing 50 mM Tris-HCl, pH 7.4, 1 mM MgCl2, and 1mM EDTA in the presence of protease inhibitors followed by centrifugation at 45 000 g for 20 minutes. The membrane pellets are washed and frozen at -80 °C in aliquots until use. Saturation binding reactions are performed at 30 °C for 90 minutes using [3H]CP 55,940 (0.01–8 nM) in an assay buffer containing 50 mM Tris-HCl, pH 7.4, 2.5 mM EDTA, 5mM MgCl2, and 0.05% fatty acid free bovine serum albumin (BSA) and the reactions are terminated by rapid vacuum filtration through UniFilter-96 GF/C filter plates and four washes with cold assay buffer. Competition experiments are conducted using 0.5 nM [3H]CP 55,940 in the presence of test compounds (0.1 nM–10 μM). Nonspecific binding is defined by 10 mM unlabeled CP 55,940. KD values from saturation binding assays and Ki values from competition binding assays are determined with one site binding or one site competition curve fitting using the Prism software.

Animal Study:[1]
  • Animal Models

    250-350 g male Sprague-Dawley rats

  • Dosages

    0, 100, 300, 1000, 3000 μg/kg

  • Administration

    Administered via i.p.

Customer Product Validation

Data from [Sci China Life Sci, 2014, 57(2), 201-8]

Data from [Data independently produced by , , Cell Physiol Biochem, 2016, 39(4):1521-36]

Selleck's AM1241 has been cited by 16 publications

CB2R activation ameliorates late adolescent chronic alcohol exposure-induced anxiety-like behaviors during withdrawal by preventing morphological changes and suppressing NLRP3 inflammasome activation in prefrontal cortex microglia in mice [ Brain Behav Immun, 2023, 110:60-79] PubMed: 36754245
EVs-mediated delivery of CB2 receptor agonist for Alzheimer's disease therapy [ Asian J Pharm Sci, 2023, 18(4):100835] PubMed: 37645682
EVs-mediated delivery of CB2 receptor agonist for Alzheimer's disease therapy [ Asian J Pharm Sci, 2023, 18(4):100835] PubMed: 37645682
Activation of cannabinoid receptor 2 attenuates Angiotensin II-induced atrial fibrillation via a potential NOX/CaMKII mechanism [ Front Cardiovasc Med, 2022, 9:968014] PubMed: 36312282
Fast-Acting and Receptor-Mediated Regulation of Neuronal Signaling Pathways by Copaiba Essential Oil. [ Int J Mol Sci, 2020, 21(7)] PubMed: 32218156
The fatty-acid amide hydrolase inhibitor URB597 inhibits MICA/B shedding [ Sci Rep, 2020, 10(1):15556] PubMed: 32968163
Pharmacological activation of CB2 receptor protects against ethanol-induced myocardial injury related to RIP1/RIP3/MLKL-mediated necroptosis [ Mol Cell Biochem, 2020, 10.1007/s11010-020-03828-1] PubMed: 32681290
Crocetin Alleviates Inflammation in MPTP-Induced Parkinson's Disease Models through Improving Mitochondrial Functions [ Parkinsons Dis, 2020, 2020:9864370] PubMed: 33101635
Activation of cannabinoid type 2 receptor protects skeletal muscle from ischemia-reperfusion injury partly via Nrf2 signaling. [ Life Sci, 2019, 230:55-67] PubMed: 31128135
Pretreatment with AM1241 Enhances the Analgesic Effect of Intrathecally Administrated Mesenchymal Stem Cells. [ Stem Cells Int, 2019, 2019:7025473] PubMed: 31611918

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

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