Agomelatine

A melatonin receptor agonist of MT1 (Ki=0.1nM) and MT2 (Ki=0.12nM), and a 5-HT2C (Ki=631nM) receptor antagonist; has no effect on monoamine uptake and no affinity for adrenergic, histaminergic, cholinergic, dopaminergic and benzodiazepine receptors, nor other serotonergic receptors; a melatonergic antidepressant treatment of major depressive disorder with relatively favorable side effect profile.Depression Approved (In Vitro) :Agomelatine (S 20098) acts as a full agonist of MT1 and MT2 receptors with EC50s of 1.6±0.4, 0.10±0.04 nM for CHO hMT1, CHO-hMT2 (hΜΤ1 and hΜΤ2 receptors expressed in CHO or HEK cell membranes) .Agomelatine (S20098) also interacts with h5-HT2B receptors (6.6), whereas Agomelatine shows low affinity at native (rat) /cloned, human 5-HT2A (<5.0/5.3) and 5-HT1A (<5.0/5.2) receptors, and negligible (<5.0) affinity for other 5-HT receptors. (In Vivo) :Agomelatine (25, 50, or 75 mg/kg; i.p.) has antioxidant activity in Strychnine (75 mg/kg, i.p.) or Pilocarpine (400 mg/kg, i.p.) induced seizure models in mice. Agomelatine dose not have any antioxidant effects on parameters of oxidative stress produced by Pentylenetetrazole (PTZ) or Picrotoxin (PTX) induced seizure models when compared to controls.