Agomelatine hydrochloride

A melatonin receptor agonist and 5-HT2B and 5-HT2C antagonist

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5mg

￥500.00

400.00

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10mg

￥775.00

620.00

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50mg

￥2475.00

1980.00

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100mg

￥3725.00

2980.00

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200mg

￥0.00

0.00

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500mg

￥0.00

0.00

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Background

Agomelatine is an agonist of melatonin (MT) receptors and a derivative of melatonin .¹ It binds to MT₁ and MT₂ receptors (K_is = 0.14 and 0.41 nM, respectively) and has an EC₅₀ value of 0.1 nM in a [³⁵S]GTPγS binding assay using CHO cells expressing MT₂ receptors. Agomelatine is also an antagonist of the serotonin (5-HT) receptor subtypes 5-HT_2B and 5-HT_2C (K_is = 0.26 and 0.71 nM, respectively, for the human receptors).² Agomelatine (40 mg/kg) inhibits the penile erection response induced by the 5-HT₂ agonist Ro 60-0175 in rats. It also increases extracellular levels of noradrenaline and dopamine in the frontal cortex of freely moving rats when administered at doses ranging from 20 to 80 mg/kg. Agomelatine (10 mg/kg) reduces immobility time in the forced swim test and increases the amount of time spent in the open arms of the elevated plus maze in mice, indicating antidepressant-like and anxiolytic-like activity, in a transgenic neuroendocrine model of depression.³ It also increases the rate of readjustment to circadian activity cycles following an induced phase shift.

1.Poissonnier-Durieux, S., Ettaoussi, M., Pérès, B., et al.Synthesis of 3-phenylnaphthalenic derivatives as new selective MT2 melatoninergic ligandsBioorg. Med. Chem.16(18)8339-8348(2008) 2.Millan, M.J., Gobert, A., Lejeune, F., et al.The novel melatonin agonist agomelatine (S20098) is an antagonist at 5-hydroxytryptamine2C receptors, blockade of which enhances the activity of frontocortical dopaminergic and adrenergic pathwaysJ. Pharmacol. Exp. Ther.306(3)954-964(2003) 3.Barden, N., Shink, E., Labbé, M., et al.Antidepressant action of agomelatine (S 20098) in a transgenic mouse modelProg. Neuropsychopharmacol. Biol. Psychiatry29(6)908-916(2005)