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Pathway Description
Clomipramine Mechanism of Action Action Pathway
Homo sapiens
Drug Action Pathway
Clomipramine is a tricyclic antidepressant classified as a serotonin-norepinephrine reuptake inhibitor (SNRI). It blocks both sodium dependent serotonin and sodium dependent norepinephrine transporters from removing serotonin and norepinephrine respectively from the synaptic cleft. This allows an accumulation of the neurotransmitters to stimulate their receptors repeatedly increasing the signal of the receptors. In depressed individuals serotonin and norepinephrine stimulation is low so an increase in serotonin and norepinephrine in the synapses can increase the stimulation of these receptors. The receptors that are being stimulated are 5-HT 2A, 2B, and 2C serotonin receptors and alpha 1 and beta 1 adrenergic receptors while clomipramine also desensitizes alpha 2 adrenergic receptors. Stimulation of the 2A, 2B and 3C receptor can increase cognitive abilities like learning, appetite, memory, mood and sleep. Sensitization of alpha A1 and beta B1 adrenergic receptors also improve cognitive function, fatigue, sleep and the immune system. It can also block histamine H1 receptors and muscarinic receptors which are the causes of the side effects like blurry vision, dry mouth and constipation experienced by those who take clomipramine. Clomipramine can be taken orally as a tablet or capsule to treat depression, OCD, schizophrenia and Tourettes.
References
Clomipramine Mechanism of Action Pathway References
Maletic V, Eramo A, Gwin K, Offord S. J, Duffy R. A. The Role of Norepinephrine and Its a-Adrenergic Receptors in the Pathophysiology and Treatment of Major Depressive Disorder and Schizophrenia: A Systematic Review. Psychiatry 8: 42, 2017.
Celada P, Puig M. V, Amargos-Bosch M, Adell A, Artigas F. The therapeutic role of 5-HT1A and 5-HT2A receptors in depression. J Psychiatry Neurosci 29(4): 252-265, 1004.
Landen M, Thase M. E. A model to explain the therapeutic effects of serotonin reuptake inhibitors: the role of 5-HT2 receptors. Psychopharmacol Bull. 39(1): 147-166, 2006.
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