Mirtazapine
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Basic Info
| Common Name | Mirtazapine(F04750) |
| 2D Structure | |
| Description | Mirtazapine is an antidepressant introduced by Organon International in 1996 used for the treatment of moderate to severe depression. Mirtazapine has a tetracyclic chemical structure and is classified as a noradrenergic and specific serotonergic antidepressant (NaSSA). It is the only tetracyclic antidepressant that has been approved by the Food and Drug Administration to treat depression. |
| FRCD ID | F04750 |
| CAS Number | 61337-67-5 |
| PubChem CID | 4205 |
| Formula | C17H19N3 |
| IUPAC Name | None |
| InChI Key | RONZAEMNMFQXRA-UHFFFAOYSA-N |
| InChI | InChI=1S/C17H19N3/c1-19-9-10-20-16(12-19)15-7-3-2-5-13(15)11-14-6-4-8-18-17(14)20/h2-8,16H,9-12H2,1H3 |
| Canonical SMILES | CN1CCN2C(C1)C3=CC=CC=C3CC4=C2N=CC=C4 |
| Isomeric SMILES | CN1CCN2C(C1)C3=CC=CC=C3CC4=C2N=CC=C4 |
| Wikipedia | Mirtazapine |
| Synonyms |
6-Azamianserin
mirtazapine
Remeron
85650-52-8
Mepirzepine
Remergil
Zispin
61337-67-5
Remergon
Rexer
|
| Classifies |
Predicted: Pesticide
|
| Update Date | Nov 13, 2018 17:07 |
Chemical Taxonomy
| Kingdom | Organic compounds |
| Superclass | Organoheterocyclic compounds |
| Class | Piperazinoazepines |
| Subclass | Not available |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Piperazinoazepines |
| Alternative Parents | |
| Molecular Framework | Aromatic heteropolycyclic compounds |
| Substituents | Benzazepine - Piperazino-azepine - Dialkylarylamine - Azepine - N-methylpiperazine - N-alkylpiperazine - Aralkylamine - Imidolactam - Benzenoid - Pyridine - Piperazine - 1,4-diazinane - Heteroaromatic compound - Tertiary aliphatic amine - Tertiary amine - Azacycle - Amine - Organopnictogen compound - Organonitrogen compound - Organic nitrogen compound - Hydrocarbon derivative - Aromatic heteropolycyclic compound |
| Description | This compound belongs to the class of organic compounds known as piperazinoazepines. These are compounds containing a piperazinoazepine skeleton, which consists of an azepine ring fused to a piperazine. |
Properties
| Property Name | Property Value |
|---|---|
| Molecular Weight | 265.36 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 3 |
| Rotatable Bond Count | 0 |
| Complexity | 345 |
| Monoisotopic Mass | 265.158 |
| Exact Mass | 265.158 |
| XLogP | 3.3 |
| Formal Charge | 0 |
| Heavy Atom Count | 20 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 1 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Isotope Atom Count | 0 |
| Covalently-Bonded Unit Count | 1 |
ADMET
| Model | Result | Probability |
|---|---|---|
| Absorption | ||
| Blood-Brain Barrier | BBB+ | 0.9855 |
| Human Intestinal Absorption | HIA+ | 0.9873 |
| Caco-2 Permeability | Caco2+ | 0.7283 |
| P-glycoprotein Substrate | Substrate | 0.8462 |
| P-glycoprotein Inhibitor | Inhibitor | 0.6148 |
| Non-inhibitor | 0.8975 | |
| Renal Organic Cation Transporter | Inhibitor | 0.7956 |
| Distribution | ||
| Subcellular localization | Lysosome | 0.4860 |
| Metabolism | ||
| CYP450 2C9 Substrate | Non-substrate | 0.7988 |
| CYP450 2D6 Substrate | Substrate | 0.7894 |
| CYP450 3A4 Substrate | Non-substrate | 0.5148 |
| CYP450 1A2 Inhibitor | Inhibitor | 0.8503 |
| CYP450 2C9 Inhibitor | Non-inhibitor | 0.6675 |
| CYP450 2D6 Inhibitor | Inhibitor | 0.7222 |
| CYP450 2C19 Inhibitor | Non-inhibitor | 0.6206 |
| CYP450 3A4 Inhibitor | Non-inhibitor | 0.8309 |
| CYP Inhibitory Promiscuity | Low CYP Inhibitory Promiscuity | 0.6031 |
| Excretion | ||
| Toxicity | ||
| Human Ether-a-go-go-Related Gene Inhibition | Weak inhibitor | 0.7532 |
| Inhibitor | 0.7455 | |
| AMES Toxicity | Non AMES toxic | 0.8079 |
| Carcinogens | Non-carcinogens | 0.9742 |
| Fish Toxicity | High FHMT | 0.5607 |
| Tetrahymena Pyriformis Toxicity | High TPT | 0.9288 |
| Honey Bee Toxicity | Low HBT | 0.8638 |
| Biodegradation | Not ready biodegradable | 0.9919 |
| Acute Oral Toxicity | III | 0.8137 |
| Carcinogenicity (Three-class) | Non-required | 0.7321 |
| Model | Value | Unit |
|---|---|---|
| Absorption | ||
| Aqueous solubility | -2.6755 | LogS |
| Caco-2 Permeability | 1.4390 | LogPapp, cm/s |
| Distribution | ||
| Metabolism | ||
| Excretion | ||
| Toxicity | ||
| Rat Acute Toxicity | 2.5197 | LD50, mol/kg |
| Fish Toxicity | 1.9179 | pLC50, mg/L |
| Tetrahymena Pyriformis Toxicity | 0.7129 | pIGC50, ug/L |
References
| Title | Journal | Date | Pubmed ID |
|---|---|---|---|
| Drug exposure and clinical effect of transdermal mirtazapine in healthy youngcats: a pilot study. | J Feline Med Surg | 2017 Oct | 27613493 |
| Functional dyspepsia: new insights into pathogenesis and therapy. | Korean J Intern Med | 2016 May | 27048251 |
| Combined treatment with subchronic lithium and acute intracerebral mirtazapinemicroinjection into the median raphe nucleus exerted an anxiolytic-like effectsynergistically. | Eur J Pharmacol | 2016 Jul 15 | 27154172 |
| Pharmacological appetite stimulation: rational choices in the inappetent cat. | J Feline Med Surg | 2014 Sep | 25146662 |
| Pharmacologic management of human immunodeficiency virus wasting syndrome. | Pharmacotherapy | 2014 Aug | 24782295 |
| [Functional and motor digestive disorders]. | Gastroenterol Hepatol | 2013 Oct | 24160947 |
| Increased Cdk5/p35 activity in the dentate gyrus mediates depressive-likebehaviour in rats. | Int J Neuropsychopharmacol | 2012 Jul | 21682945 |
| Headache (chronic tension-type). | BMJ Clin Evid | 2009 Jul 22 | 21696647 |
| Headache (chronic tension-type). | BMJ Clin Evid | 2007 Jan 1 | 19454042 |
Targets
- General Function:
- Virus receptor activity
- Specific Function:
- G-protein coupled receptor for 5-hydroxytryptamine (serotonin). Also functions as a receptor for various drugs and psychoactive substances, including mescaline, psilocybin, 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI) and lysergic acid diethylamide (LSD). Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors. Beta-arrestin family members inhibit signaling via G proteins and mediate activation of alternative signaling pathways. Signaling activates phospholipase C and a phosphatidylinositol-calcium second messenger system that modulates the activity of phosphatidylinositol 3-kinase and promotes the release of Ca(2+) ions from intracellular stores. Affects neural activity, perception, cognition and mood. Plays a role in the regulation of behavior, including responses to anxiogenic situations and psychoactive substances. Plays a role in intestinal smooth muscle contraction, and may play a role in arterial vasoconstriction.(Microbial infection) Acts as a receptor for human JC polyomavirus/JCPyV.
- Gene Name:
- HTR2A
- Uniprot ID:
- P28223
- Molecular Weight:
- 52602.58 Da
- Mechanism of Action:
- Mirtazapine acts as an antagonist at central pre-synaptic alpha(2)-receptors, inhibiting negative feedback to the presynaptic nerve and causing an increase in NE release. Blockade of heteroreceptors, alpha(2)-receptors contained in serotenergic neurons, enhances the release of 5-HT, increasing the interactions between 5-HT and 5-HT<sub>1</sub> receptors and contributing to the anxiolytic effects of mirtazapine. Mirtazapine also acts as a weak antagonist at 5-HT<sub>1</sub> receptors and as a potent antagonist at 5-HT<sub>2</sub> (particularly subtypes 2A and 2C) and 5-HT<sub>3</sub> receptors. Blockade of these receptors may explain the lower incidence of adverse effects such as anxiety, insomnia, and nausea. Mirtazapine also exhibits significant antagonism at H1-receptors, resulting in sedation. Mirtazapine has no effects on the reuptake of either NE or 5-HT and has only minimal activity at dopaminergic and muscarinic receptors.
References
- Gorman JM: Mirtazapine: clinical overview. J Clin Psychiatry. 1999;60 Suppl 17:9-13; discussion 46-8. [10446735 ]
- General Function:
- Serotonin receptor activity
- Specific Function:
- G-protein coupled receptor for 5-hydroxytryptamine (serotonin). Also functions as a receptor for various drugs and psychoactive substances, including ergot alkaloid derivatives, 1-2,5,-dimethoxy-4-iodophenyl-2-aminopropane (DOI) and lysergic acid diethylamide (LSD). Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors. Beta-arrestin family members inhibit signaling via G proteins and mediate activation of alternative signaling pathways. Signaling activates a phosphatidylinositol-calcium second messenger system that modulates the activity of phosphatidylinositol 3-kinase and down-stream signaling cascades and promotes the release of Ca(2+) ions from intracellular stores. Regulates neuronal activity via the activation of short transient receptor potential calcium channels in the brain, and thereby modulates the activation of pro-opiomelacortin neurons and the release of CRH that then regulates the release of corticosterone. Plays a role in the regulation of appetite and eating behavior, responses to anxiogenic stimuli and stress. Plays a role in insulin sensitivity and glucose homeostasis.
- Gene Name:
- HTR2C
- Uniprot ID:
- P28335
- Molecular Weight:
- 51820.705 Da
- Mechanism of Action:
- Mirtazapine acts as an antagonist at central pre-synaptic alpha(2)-receptors, inhibiting negative feedback to the presynaptic nerve and causing an increase in NE release. Blockade of heteroreceptors, alpha(2)-receptors contained in serotenergic neurons, enhances the release of 5-HT, increasing the interactions between 5-HT and 5-HT<sub>1</sub> receptors and contributing to the anxiolytic effects of mirtazapine. Mirtazapine also acts as a weak antagonist at 5-HT<sub>1</sub> receptors and as a potent antagonist at 5-HT<sub>2</sub> (particularly subtypes 2A and 2C) and 5-HT<sub>3</sub> receptors. Blockade of these receptors may explain the lower incidence of adverse effects such as anxiety, insomnia, and nausea. Mirtazapine also exhibits significant antagonism at H1-receptors, resulting in sedation. Mirtazapine has no effects on the reuptake of either NE or 5-HT and has only minimal activity at dopaminergic and muscarinic receptors.
References
- Benelli A, Frigeri C, Bertolini A, Genedani S: Influence of mirtazapine on the sexual behavior of male rats. Psychopharmacology (Berl). 2004 Jan;171(3):250-8. Epub 2003 Nov 13. [14615872 ]
- General Function:
- Histamine receptor activity
- Specific Function:
- The H3 subclass of histamine receptors could mediate the histamine signals in CNS and peripheral nervous system. Signals through the inhibition of adenylate cyclase and displays high constitutive activity (spontaneous activity in the absence of agonist). Agonist stimulation of isoform 3 neither modified adenylate cyclase activity nor induced intracellular calcium mobilization.
- Gene Name:
- HRH3
- Uniprot ID:
- Q9Y5N1
- Molecular Weight:
- 48670.81 Da
References
- Millan MJ, Gobert A, Rivet JM, Adhumeau-Auclair A, Cussac D, Newman-Tancredi A, Dekeyne A, Nicolas JP, Lejeune F: Mirtazapine enhances frontocortical dopaminergic and corticolimbic adrenergic, but not serotonergic, transmission by blockade of alpha2-adrenergic and serotonin2C receptors: a comparison with citalopram. Eur J Neurosci. 2000 Mar;12(3):1079-95. [10762339 ]
- Uniprot ID:
- P35348; P35368; P25100
References
- Fernandez J, Alonso JM, Andres JI, Cid JM, Diaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA: Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents. J Med Chem. 2005 Mar 24;48(6):1709-12. [15771415 ]
- General Function:
- Protein homodimerization activity
- Specific Function:
- Alpha-2 adrenergic receptors mediate the catecholamine-induced inhibition of adenylate cyclase through the action of G proteins.
- Gene Name:
- ADRA2C
- Uniprot ID:
- P18825
- Molecular Weight:
- 49521.585 Da
References
- Fernandez J, Alonso JM, Andres JI, Cid JM, Diaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA: Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents. J Med Chem. 2005 Mar 24;48(6):1709-12. [15771415 ]
- Uniprot ID:
- P21728; P21918
References
- de Boer T: The effects of mirtazapine on central noradrenergic and serotonergic neurotransmission. Int Clin Psychopharmacol. 1995 Dec;10 Suppl 4:19-23. [8930006 ]
- General Function:
- Potassium channel regulator activity
- Specific Function:
- Dopamine receptor whose activity is mediated by G proteins which inhibit adenylyl cyclase.
- Gene Name:
- DRD2
- Uniprot ID:
- P14416
- Molecular Weight:
- 50618.91 Da
References
- Fernandez J, Alonso JM, Andres JI, Cid JM, Diaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA: Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents. J Med Chem. 2005 Mar 24;48(6):1709-12. [15771415 ]
- General Function:
- G-protein coupled amine receptor activity
- Specific Function:
- Dopamine receptor whose activity is mediated by G proteins which inhibit adenylyl cyclase. Promotes cell proliferation.
- Gene Name:
- DRD3
- Uniprot ID:
- P35462
- Molecular Weight:
- 44224.335 Da
References
- Fernandez J, Alonso JM, Andres JI, Cid JM, Diaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA: Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents. J Med Chem. 2005 Mar 24;48(6):1709-12. [15771415 ]
- General Function:
- Serotonin receptor activity
- Specific Function:
- This is one of the several different receptors for 5-hydroxytryptamine (serotonin), a biogenic hormone that functions as a neurotransmitter, a hormone, and a mitogen. The activity of this receptor is mediated by G proteins that stimulate adenylate cyclase.
- Gene Name:
- HTR7
- Uniprot ID:
- P34969
- Molecular Weight:
- 53554.43 Da
References
- Fernandez J, Alonso JM, Andres JI, Cid JM, Diaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA: Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents. J Med Chem. 2005 Mar 24;48(6):1709-12. [15771415 ]
- General Function:
- Monoamine transmembrane transporter activity
- Specific Function:
- Amine transporter. Terminates the action of dopamine by its high affinity sodium-dependent reuptake into presynaptic terminals.
- Gene Name:
- SLC6A3
- Uniprot ID:
- Q01959
- Molecular Weight:
- 68494.255 Da
References
- Tatsumi M, Groshan K, Blakely RD, Richelson E: Pharmacological profile of antidepressants and related compounds at human monoamine transporters. Eur J Pharmacol. 1997 Dec 11;340(2-3):249-58. [9537821 ]
- General Function:
- Norepinephrine:sodium symporter activity
- Specific Function:
- Amine transporter. Terminates the action of noradrenaline by its high affinity sodium-dependent reuptake into presynaptic terminals.
- Gene Name:
- SLC6A2
- Uniprot ID:
- P23975
- Molecular Weight:
- 69331.42 Da
References
- Tatsumi M, Groshan K, Blakely RD, Richelson E: Pharmacological profile of antidepressants and related compounds at human monoamine transporters. Eur J Pharmacol. 1997 Dec 11;340(2-3):249-58. [9537821 ]
- General Function:
- Serotonin:sodium symporter activity
- Specific Function:
- Serotonin transporter whose primary function in the central nervous system involves the regulation of serotonergic signaling via transport of serotonin molecules from the synaptic cleft back into the pre-synaptic terminal for re-utilization. Plays a key role in mediating regulation of the availability of serotonin to other receptors of serotonergic systems. Terminates the action of serotonin and recycles it in a sodium-dependent manner.
- Gene Name:
- SLC6A4
- Uniprot ID:
- P31645
- Molecular Weight:
- 70324.165 Da
References
- Tatsumi M, Groshan K, Blakely RD, Richelson E: Pharmacological profile of antidepressants and related compounds at human monoamine transporters. Eur J Pharmacol. 1997 Dec 11;340(2-3):249-58. [9537821 ]
- General Function:
- Epinephrine binding
- Specific Function:
- Alpha-2 adrenergic receptors mediate the catecholamine-induced inhibition of adenylate cyclase through the action of G proteins. The rank order of potency for agonists of this receptor is clonidine > norepinephrine > epinephrine = oxymetazoline > dopamine > p-tyramine = phenylephrine > serotonin > p-synephrine / p-octopamine. For antagonists, the rank order is yohimbine > chlorpromazine > phentolamine > mianserine > spiperone > prazosin > alprenolol > propanolol > pindolol.
- Gene Name:
- ADRA2B
- Uniprot ID:
- P18089
- Molecular Weight:
- 49565.8 Da
References
- Kennis LE, Bischoff FP, Mertens CJ, Love CJ, Van den Keybus FA, Pieters S, Braeken M, Megens AA, Leysen JE: New 2-substituted 1,2,3,4-tetrahydrobenzofuro[3,2-c]pyridine having highly active and potent central alpha 2-antagonistic activity as potential antidepressants. Bioorg Med Chem Lett. 2000 Jan 3;10(1):71-4. [10636247 ]
- General Function:
- Receptor signaling protein activity
- Specific Function:
- Beta-adrenergic receptors mediate the catecholamine-induced activation of adenylate cyclase through the action of G proteins. This receptor binds epinephrine and norepinephrine with approximately equal affinity. Mediates Ras activation through G(s)-alpha- and cAMP-mediated signaling.
- Gene Name:
- ADRB1
- Uniprot ID:
- P08588
- Molecular Weight:
- 51322.1 Da
References
- Millan MJ, Gobert A, Rivet JM, Adhumeau-Auclair A, Cussac D, Newman-Tancredi A, Dekeyne A, Nicolas JP, Lejeune F: Mirtazapine enhances frontocortical dopaminergic and corticolimbic adrenergic, but not serotonergic, transmission by blockade of alpha2-adrenergic and serotonin2C receptors: a comparison with citalopram. Eur J Neurosci. 2000 Mar;12(3):1079-95. [10762339 ]
- General Function:
- Protein homodimerization activity
- Specific Function:
- Beta-adrenergic receptors mediate the catecholamine-induced activation of adenylate cyclase through the action of G proteins. The beta-2-adrenergic receptor binds epinephrine with an approximately 30-fold greater affinity than it does norepinephrine.
- Gene Name:
- ADRB2
- Uniprot ID:
- P07550
- Molecular Weight:
- 46458.32 Da
References
- Millan MJ, Gobert A, Rivet JM, Adhumeau-Auclair A, Cussac D, Newman-Tancredi A, Dekeyne A, Nicolas JP, Lejeune F: Mirtazapine enhances frontocortical dopaminergic and corticolimbic adrenergic, but not serotonergic, transmission by blockade of alpha2-adrenergic and serotonin2C receptors: a comparison with citalopram. Eur J Neurosci. 2000 Mar;12(3):1079-95. [10762339 ]
- General Function:
- Sh3 domain binding
- Specific Function:
- Dopamine receptor responsible for neuronal signaling in the mesolimbic system of the brain, an area of the brain that regulates emotion and complex behavior. Its activity is mediated by G proteins which inhibit adenylyl cyclase. Modulates the circadian rhythm of contrast sensitivity by regulating the rhythmic expression of NPAS2 in the retinal ganglion cells (By similarity).
- Gene Name:
- DRD4
- Uniprot ID:
- P21917
- Molecular Weight:
- 48359.86 Da
References
- Wikstrom HV, Mensonides-Harsema MM, Cremers TI, Moltzen EK, Arnt J: Synthesis and pharmacological testing of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin and its enantiomers in comparison with the two antidepressants mianserin and mirtazapine. J Med Chem. 2002 Jul 18;45(15):3280-5. [12109911 ]
- General Function:
- Serotonin receptor activity
- Specific Function:
- G-protein coupled receptor for 5-hydroxytryptamine (serotonin). Also functions as a receptor for various drugs and psychoactive substances. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase. Beta-arrestin family members inhibit signaling via G proteins and mediate activation of alternative signaling pathways. Signaling inhibits adenylate cyclase activity and activates a phosphatidylinositol-calcium second messenger system that regulates the release of Ca(2+) ions from intracellular stores. Plays a role in the regulation of 5-hydroxytryptamine release and in the regulation of dopamine and 5-hydroxytryptamine metabolism. Plays a role in the regulation of dopamine and 5-hydroxytryptamine levels in the brain, and thereby affects neural activity, mood and behavior. Plays a role in the response to anxiogenic stimuli.
- Gene Name:
- HTR1A
- Uniprot ID:
- P08908
- Molecular Weight:
- 46106.335 Da
- Mechanism of Action:
- Mirtazapine acts as an antagonist at central pre-synaptic alpha(2)-receptors, inhibiting negative feedback to the presynaptic nerve and causing an increase in NE release. Blockade of heteroreceptors, alpha(2)-receptors contained in serotenergic neurons, enhances the release of 5-HT, increasing the interactions between 5-HT and 5-HT<sub>1</sub> receptors and contributing to the anxiolytic effects of mirtazapine. Mirtazapine also acts as a weak antagonist at 5-HT<sub>1</sub> receptors and as a potent antagonist at 5-HT<sub>2</sub> (particularly subtypes 2A and 2C) and 5-HT<sub>3</sub> receptors. Blockade of these receptors may explain the lower incidence of adverse effects such as anxiety, insomnia, and nausea. Mirtazapine also exhibits significant antagonism at H1-receptors, resulting in sedation. Mirtazapine has no effects on the reuptake of either NE or 5-HT and has only minimal activity at dopaminergic and muscarinic receptors.
References
- Schreiber S, Bleich A, Pick CG: Venlafaxine and mirtazapine: different mechanisms of antidepressant action, common opioid-mediated antinociceptive effects--a possible opioid involvement in severe depression? J Mol Neurosci. 2002 Feb-Apr;18(1-2):143-9. [11931344 ]
- General Function:
- Voltage-gated potassium channel activity
- Specific Function:
- This is one of the several different receptors for 5-hydroxytryptamine (serotonin), a biogenic hormone that functions as a neurotransmitter, a hormone, and a mitogen. This receptor is a ligand-gated ion channel, which when activated causes fast, depolarizing responses in neurons. It is a cation-specific, but otherwise relatively nonselective, ion channel.
- Gene Name:
- HTR3A
- Uniprot ID:
- P46098
- Molecular Weight:
- 55279.835 Da
- Mechanism of Action:
- Mirtazapine acts as an antagonist at central pre-synaptic alpha(2)-receptors, inhibiting negative feedback to the presynaptic nerve and causing an increase in NE release. Blockade of heteroreceptors, alpha(2)-receptors contained in serotenergic neurons, enhances the release of 5-HT, increasing the interactions between 5-HT and 5-HT<sub>1</sub> receptors and contributing to the anxiolytic effects of mirtazapine. Mirtazapine also acts as a weak antagonist at 5-HT<sub>1</sub> receptors and as a potent antagonist at 5-HT<sub>2</sub> (particularly subtypes 2A and 2C) and 5-HT<sub>3</sub> receptors. Blockade of these receptors may explain the lower incidence of adverse effects such as anxiety, insomnia, and nausea. Mirtazapine also exhibits significant antagonism at H1-receptors, resulting in sedation. Mirtazapine has no effects on the reuptake of either NE or 5-HT and has only minimal activity at dopaminergic and muscarinic receptors.
References
- Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. [11752352 ]
- General Function:
- Serotonin receptor activity
- Specific Function:
- G-protein coupled receptor for 5-hydroxytryptamine (serotonin). Also functions as a receptor for various ergot alkaloid derivatives and psychoactive substances. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors. Beta-arrestin family members inhibit signaling via G proteins and mediate activation of alternative signaling pathways. Signaling activates a phosphatidylinositol-calcium second messenger system that modulates the activity of phosphatidylinositol 3-kinase and down-stream signaling cascades and promotes the release of Ca(2+) ions from intracellular stores. Plays a role in the regulation of dopamine and 5-hydroxytryptamine release, 5-hydroxytryptamine uptake and in the regulation of extracellular dopamine and 5-hydroxytryptamine levels, and thereby affects neural activity. May play a role in the perception of pain. Plays a role in the regulation of behavior, including impulsive behavior. Required for normal proliferation of embryonic cardiac myocytes and normal heart development. Protects cardiomyocytes against apoptosis. Plays a role in the adaptation of pulmonary arteries to chronic hypoxia. Plays a role in vasoconstriction. Required for normal osteoblast function and proliferation, and for maintaining normal bone density. Required for normal proliferation of the interstitial cells of Cajal in the intestine.
- Gene Name:
- HTR2B
- Uniprot ID:
- P41595
- Molecular Weight:
- 54297.41 Da
References
- Millan MJ, Gobert A, Rivet JM, Adhumeau-Auclair A, Cussac D, Newman-Tancredi A, Dekeyne A, Nicolas JP, Lejeune F: Mirtazapine enhances frontocortical dopaminergic and corticolimbic adrenergic, but not serotonergic, transmission by blockade of alpha2-adrenergic and serotonin2C receptors: a comparison with citalopram. Eur J Neurosci. 2000 Mar;12(3):1079-95. [10762339 ]
- General Function:
- Thioesterase binding
- Specific Function:
- Alpha-2 adrenergic receptors mediate the catecholamine-induced inhibition of adenylate cyclase through the action of G proteins. The rank order of potency for agonists of this receptor is oxymetazoline > clonidine > epinephrine > norepinephrine > phenylephrine > dopamine > p-synephrine > p-tyramine > serotonin = p-octopamine. For antagonists, the rank order is yohimbine > phentolamine = mianserine > chlorpromazine = spiperone = prazosin > propanolol > alprenolol = pindolol.
- Gene Name:
- ADRA2A
- Uniprot ID:
- P08913
- Molecular Weight:
- 48956.275 Da
- Mechanism of Action:
- Mirtazapine acts as an antagonist at central pre-synaptic alpha(2)-receptors, inhibiting negative feedback to the presynaptic nerve and causing an increase in NE release. Blockade of heteroreceptors, alpha(2)-receptors contained in serotenergic neurons, enhances the release of 5-HT, increasing the interactions between 5-HT and 5-HT<sub>1</sub> receptors and contributing to the anxiolytic effects of mirtazapine. Mirtazapine also acts as a weak antagonist at 5-HT<sub>1</sub> receptors and as a potent antagonist at 5-HT<sub>2</sub> (particularly subtypes 2A and 2C) and 5-HT<sub>3</sub> receptors. Blockade of these receptors may explain the lower incidence of adverse effects such as anxiety, insomnia, and nausea. Mirtazapine also exhibits significant antagonism at H1-receptors, resulting in sedation. Mirtazapine has no effects on the reuptake of either NE or 5-HT and has only minimal activity at dopaminergic and muscarinic receptors.
References
- Garcia-Sevilla JA, Ventayol P, Perez V, Rubovszky G, Puigdemont D, Ferrer-Alcon M, Andreoli A, Guimon J, Alvarez E: Regulation of platelet alpha 2A-adrenoceptors, Gi proteins and receptor kinases in major depression: effects of mirtazapine treatment. Neuropsychopharmacology. 2004 Mar;29(3):580-8. [14628003 ]
- General Function:
- Protein heterodimerization activity
- Specific Function:
- This alpha-adrenergic receptor mediates its action by association with G proteins that activate a phosphatidylinositol-calcium second messenger system. Its effect is mediated by G(q) and G(11) proteins. Nuclear ADRA1A-ADRA1B heterooligomers regulate phenylephrine(PE)-stimulated ERK signaling in cardiac myocytes.
- Gene Name:
- ADRA1A
- Uniprot ID:
- P35348
- Molecular Weight:
- 51486.005 Da
References
- Millan MJ, Gobert A, Rivet JM, Adhumeau-Auclair A, Cussac D, Newman-Tancredi A, Dekeyne A, Nicolas JP, Lejeune F: Mirtazapine enhances frontocortical dopaminergic and corticolimbic adrenergic, but not serotonergic, transmission by blockade of alpha2-adrenergic and serotonin2C receptors: a comparison with citalopram. Eur J Neurosci. 2000 Mar;12(3):1079-95. [10762339 ]
- General Function:
- Histamine receptor activity
- Specific Function:
- In peripheral tissues, the H1 subclass of histamine receptors mediates the contraction of smooth muscles, increase in capillary permeability due to contraction of terminal venules, and catecholamine release from adrenal medulla, as well as mediating neurotransmission in the central nervous system.
- Gene Name:
- HRH1
- Uniprot ID:
- P35367
- Molecular Weight:
- 55783.61 Da
- Mechanism of Action:
- Mirtazapine acts as an antagonist at central pre-synaptic alpha(2)-receptors, inhibiting negative feedback to the presynaptic nerve and causing an increase in NE release. Blockade of heteroreceptors, alpha(2)-receptors contained in serotenergic neurons, enhances the release of 5-HT, increasing the interactions between 5-HT and 5-HT<sub>1</sub> receptors and contributing to the anxiolytic effects of mirtazapine. Mirtazapine also acts as a weak antagonist at 5-HT<sub>1</sub> receptors and as a potent antagonist at 5-HT<sub>2</sub> (particularly subtypes 2A and 2C) and 5-HT<sub>3</sub> receptors. Blockade of these receptors may explain the lower incidence of adverse effects such as anxiety, insomnia, and nausea. Mirtazapine also exhibits significant antagonism at H1-receptors, resulting in sedation. Mirtazapine has no effects on the reuptake of either NE or 5-HT and has only minimal activity at dopaminergic and muscarinic receptors.
References
- Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. [11752352 ]
- General Function:
- Opioid receptor activity
- Specific Function:
- G-protein coupled opioid receptor that functions as receptor for endogenous alpha-neoendorphins and dynorphins, but has low affinity for beta-endorphins. Also functions as receptor for various synthetic opioids and for the psychoactive diterpene salvinorin A. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase. Signaling leads to the inhibition of adenylate cyclase activity. Inhibits neurotransmitter release by reducing calcium ion currents and increasing potassium ion conductance. Plays a role in the perception of pain. Plays a role in mediating reduced physical activity upon treatment with synthetic opioids. Plays a role in the regulation of salivation in response to synthetic opioids. May play a role in arousal and regulation of autonomic and neuroendocrine functions.
- Gene Name:
- OPRK1
- Uniprot ID:
- P41145
- Molecular Weight:
- 42644.665 Da
- Mechanism of Action:
- Mirtazapine acts as an antagonist at central pre-synaptic alpha(2)-receptors, inhibiting negative feedback to the presynaptic nerve and causing an increase in NE release. Blockade of heteroreceptors, alpha(2)-receptors contained in serotenergic neurons, enhances the release of 5-HT, increasing the interactions between 5-HT and 5-HT<sub>1</sub> receptors and contributing to the anxiolytic effects of mirtazapine. Mirtazapine also acts as a weak antagonist at 5-HT<sub>1</sub> receptors and as a potent antagonist at 5-HT<sub>2</sub> (particularly subtypes 2A and 2C) and 5-HT<sub>3</sub> receptors. Blockade of these receptors may explain the lower incidence of adverse effects such as anxiety, insomnia, and nausea. Mirtazapine also exhibits significant antagonism at H1-receptors, resulting in sedation. Mirtazapine has no effects on the reuptake of either NE or 5-HT and has only minimal activity at dopaminergic and muscarinic receptors.
References
- Schreiber S, Rigai T, Katz Y, Pick CG: The antinociceptive effect of mirtazapine in mice is mediated through serotonergic, noradrenergic and opioid mechanisms. Brain Res Bull. 2002 Sep 30;58(6):601-5. [12372565 ]