Information
AM-1241 is a selectivecannabinoid CB2 receptoragonist withKiof 3.4 nM, exhibits 82-fold selectivity over CB1 receptor.
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.
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. 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. 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. 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.
Cell Data
cell lines：
Concentrations：12 concentrations between 0.1 nM–10 μM
Incubation Time：90 minutes
Powder Purity:≥97%
