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| Name | Cabergoline | ||||||||||||||||||||||||||||||||||||
| Accession Number | DB00248 (APRD00836) | ||||||||||||||||||||||||||||||||||||
| Type | small molecule | ||||||||||||||||||||||||||||||||||||
| Groups | approved | ||||||||||||||||||||||||||||||||||||
| Description | Cabergoline, an ergot derivative, is a long-acting dopamine agonist and prolactin inhibitor. It is used to treat hyperprolactinemic disorders and Parkinsonian Syndrome. Cabergoline possesses potent agonist activity on dopamine D2 receptors. |
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| Structure |
Download: MOL | SDF | SMILES | InChI Display: 2D Structure | 3D Structure |
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| Brand name mixtures | Not Available | ||||||||||||||||||||||||||||||||||||
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| CAS number | 81409-90-7 | ||||||||||||||||||||||||||||||||||||
| Weight |
Average: 451.6043 Monoisotopic: 451.294725453 |
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| Chemical Formula | C26H37N5O2 | ||||||||||||||||||||||||||||||||||||
| InChI Key | InChIKey=KORNTPPJEAJQIU-KJXAQDMKSA-N | ||||||||||||||||||||||||||||||||||||
| InChI |
InChI=1S/C26H37N5O2/c1-5-11-30-17-19(25(32)31(26(33)27-6-2)13-8-12-29(3)4)14-21-20-9-7-10-22-24(20)18(16-28-22)15-23(21)30/h5,7,9-10,16,19,21,23,28H,1,6,8,11-15,17H2,2-4H3,(H,27,33)/t19-,21-,23-/m1/s1
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| IUPAC Name |
1-[3-(dimethylamino)propyl]-3-ethyl-1-{[(2R,4R,7R)-6-(prop-2-en-1-yl)-6,11-diazatetracyclo[7.6.1.0^{2,7}.0^{12,16}]hexadeca-1(15),9,12(16),13-tetraen-4-yl]carbonyl}urea
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| SMILES |
[H][C@@]12CC3=CNC4=C3C(=CC=C4)[C@@]1([H])C[C@H](CN2CC=C)C(=O)N(CCCN(C)C)C(=O)NCC
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| Mass Spec | Not Available | ||||||||||||||||||||||||||||||||||||
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| Kingdom | Organic | ||||||||||||||||||||||||||||||||||||
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| Pharmacology | |||||||||||||||||||||||||||||||||||||
| Indication | For the treatment of hyperprolactinemic disorders, either idiopathic or due to prolactinoma (prolactin-secreting adenomas). May also be used to manage symptoms of Parkinsonian Syndrome as monotherapy during initial symptomatic management or as an adjunct to levodopa therapy during advanced stages of disease. | ||||||||||||||||||||||||||||||||||||
| Pharmacodynamics | Cabergoline stimulates centrally-located dopaminergic receptors resulting in a number of pharmacologic effects. Five dopamine receptor types from two dopaminergic subfamilies have been identified. The dopaminergic D1 receptor subfamily consists of D1 and D5 subreceptors, which are associated with dyskinesias. The dopaminergic D2 receptor subfamily consists of D2, D3 and D4 subreceptors, which are associated with improvement of symptoms of movement disorders. Thus, agonist activity specific for D2 subfamily receptors, primarily D2 and D3 receptor subtypes, are the primary targets of dopaminergic antiparkinsonian agents. It is thought that postsynaptic D2 stimulation is primarily responsible for the antiparkinsonian effect of dopamine agonists, while presynaptic D2 stimulation confers neuroprotective effects. This semisynthetic ergot derivative exhibits potent agonist activity on dopamine D2- and D3-receptors. It also exhibits: agonist activity (in order of decreasing binding affinities) on 5-hydroxytryptamine (5-HT)2B, 5-HT2A, 5-HT1D, dopamine D4, 5-HT1A, dopamine D1, 5-HT1B and 5-HT2C receptors and antagonist activity on α2B, α2A, and α2C receptors. Parkinsonian Syndrome manifests when approximately 80% of dopaminergic activity in the nigrostriatal pathway of the brain is lost. As this striatum is involved in modulating the intensity of coordinated muscle activity (e.g. movement, balance, walking), loss of activity may result in dystonia (acute muscle contraction), Parkinsonism (including symptoms of bradykinesia, tremor, rigidity, and flattened affect), akathesia (inner restlessness), tardive dyskinesia (involuntary muscle movements usually associated with long-term loss of dopaminergic activity), and neuroleptic malignant syndrome, which manifests when complete blockage of nigrostriatal dopamine occurs. High dopaminergic activity in the mesolimbic pathway of the brain causes hallucinations and delusions; these side effects of dopamine agonists are manifestations seen in patients with schizophrenia who have overractivity in this area of the brain. The hallucinogenic side effects of dopamine agonists may also be due to 5-HT2A agonism. The tuberoinfundibular pathway of the brain originates in the hypothalamus and terminates in the pituitary gland. In this pathway, dopamine inhibits lactotrophs in anterior pituitary from secreting prolactin. Increased dopaminergic activity in the tuberoinfundibular pathway inhibits prolactin secretion. | ||||||||||||||||||||||||||||||||||||
| Mechanism of action | The dopamine D2 receptor is a 7-transmembrane G-protein coupled receptor associated with Gi proteins. In lactotrophs, stimulation of dopamine D2 causes inhibition of adenylyl cyclase, which decreases intracellular cAMP concentrations and blocks IP3-dependent release of Ca2+ from intracellular stores. Decreases in intracellular calcium levels may also be brought about via inhibition of calcium influx through voltage-gated calcium channels, rather than via inhibition of adenylyl cyclase. Additionally, receptor activation blocks phosphorylation of p42/p44 MAPK and decreases MAPK/ERK kinase phosphorylation. Inhibition of MAPK appears to be mediated by c-Raf and B-Raf-dependent inhibition of MAPK/ERK kinase. Dopamine-stimulated growth hormone release from the pituitary gland is mediated by a decrease in intracellular calcium influx through voltage-gated calcium channels rather than via adenylyl cyclase inhibition. Stimulation of dopamine D2 receptors in the nigrostriatal pathway leads to improvements in coordinated muscle activity in those with movement disorders. Cabergoline is a long-acting dopamine receptor agonist with a high affinity for D2 receptors. Receptor-binding studies indicate that cabergoline has low affinity for dopamine D1, α1,- and α2- adrenergic, and 5-HT1- and 5-HT2-serotonin receptors. | ||||||||||||||||||||||||||||||||||||
| Absorption | First-pass effect is seen, however the absolute bioavailability is unknown. | ||||||||||||||||||||||||||||||||||||
| Volume of distribution | Not Available | ||||||||||||||||||||||||||||||||||||
| Protein binding | Moderately bound (40% to 42%) to human plasma proteins in a concentration-independent manner. | ||||||||||||||||||||||||||||||||||||
| Metabolism |
Hepatic. Cabergoline is extensively metabolized, predominately via hydrolysis of the acylurea bond of the urea moiety. Cytochrome P-450 mediated metabolism appears to be minimal. The main metabolite identified in urine is 6-allyl-8b-carboxy-ergoline (4-6% of dose). Three other metabolites were identified urine (less than 3% of dose). |
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| Route of elimination | After oral dosing of radioactive cabergoline to five healthy volunteers, approximately 22% and 60% of the dose was excreted within 20 days in the urine and feces, respectively. Less than 4% of the dose was excreted unchanged in the urine. | ||||||||||||||||||||||||||||||||||||
| Half life | The elimination half-life is estimated from urinary data of 12 healthy subjects to range between 63 to 69 hours. | ||||||||||||||||||||||||||||||||||||
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| Toxicity | Overdosage might be expected to produce nasal congestion, syncope, or hallucinations. | ||||||||||||||||||||||||||||||||||||
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| Pathways | Not Available | ||||||||||||||||||||||||||||||||||||
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| Properties | |||||||||||||||||||||||||||||||||||||
| State | solid | ||||||||||||||||||||||||||||||||||||
| Melting point | 102 - 104 oC | ||||||||||||||||||||||||||||||||||||
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| Synthesis Reference | Not Available | ||||||||||||||||||||||||||||||||||||
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| PDB Entries | Not Available | ||||||||||||||||||||||||||||||||||||
| FDA label | Not Available | ||||||||||||||||||||||||||||||||||||
| MSDS | Not Available | ||||||||||||||||||||||||||||||||||||
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| Drug Interactions | Not Available | ||||||||||||||||||||||||||||||||||||
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| Targets |
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Pharmacological action: yes
Actions: agonist This is one of the five types (D1 to D5) of receptors for dopamine. The activity of this receptor is mediated by G proteins which inhibit adenylyl cyclase Organism class: humanUniProt ID: P14416 ![]() Gene: DRD2 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
2. 5-hydroxytryptamine 2B receptor Pharmacological action: unknownActions: agonist 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 mediates its action by association with G proteins that activate a phosphatidylinositol-calcium second messenger system Organism class: humanUniProt ID: P41595 ![]() Gene: HTR2B ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
Pharmacological action: unknown
Actions: agonist This is one of the five types (D1 to D5) of receptors for dopamine. The activity of this receptor is mediated by G proteins which inhibit adenylyl cyclase Organism class: humanUniProt ID: P35462 ![]() Gene: DRD3 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
4. 5-hydroxytryptamine 2A receptor Pharmacological action: unknownActions: agonist 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 mediates its action by association with G proteins that activate a phosphatidylinositol-calcium second messenger system. This receptor is involved in tracheal smooth muscle contraction, bronchoconstriction, and control of aldosterone production Organism class: humanUniProt ID: P28223 ![]() Gene: HTR2A ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
5. Alpha-2B adrenergic receptor Pharmacological action: unknownActions: antagonist 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 Organism class: humanUniProt ID: P18089 ![]() Gene: ADRA2B ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
6. 5-hydroxytryptamine 1D receptor Pharmacological action: unknownActions: agonist 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 inhibit adenylate cyclase activity Organism class: humanUniProt ID: P28221 ![]() Gene: HTR1D ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
Pharmacological action: unknown
Actions: agonist This is one of the five types (D1 to D5) of receptors for dopamine. The activity of this receptor is mediated by G proteins which inhibit adenylyl cyclase Organism class: humanUniProt ID: P21917 ![]() Gene: DRD4 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
8. Alpha-2A adrenergic receptor Pharmacological action: unknownActions: antagonist 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 Organism class: humanUniProt ID: P08913 ![]() Gene: ADRA2A ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
9. 5-hydroxytryptamine 1A receptor Pharmacological action: unknownActions: agonist 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 inhibit adenylate cyclase activity Organism class: humanUniProt ID: P08908 ![]() Gene: HTR1A ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
10. Alpha-2C adrenergic receptor Pharmacological action: unknownActions: antagonist Alpha-2 adrenergic receptors mediate the catecholamine- induced inhibition of adenylate cyclase through the action of G proteins Organism class: humanUniProt ID: P18825 ![]() Gene: ADRA2C ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
Pharmacological action: unknown
Actions: agonist This is one of the five types (D1 to D5) of receptors for dopamine. The activity of this receptor is mediated by G proteins which activate adenylyl cyclase Organism class: humanUniProt ID: P21918 ![]() Gene: DRD5 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
Pharmacological action: unknown
Actions: agonist This is one of the five types (D1 to D5) of receptors for dopamine. The activity of this receptor is mediated by G proteins which activate adenylyl cyclase Organism class: humanUniProt ID: P21728 ![]() Gene: DRD1 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
13. 5-hydroxytryptamine 1B receptor Pharmacological action: unknownActions: agonist 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 inhibit adenylate cyclase activity Organism class: humanUniProt ID: P28222 ![]() Gene: HTR1B ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References: 14. 5-hydroxytryptamine 2C receptor Pharmacological action: unknownActions: agonist 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 mediates its action by association with G proteins that activate a phosphatidylinositol-calcium second messenger system Organism class: humanUniProt ID: P28335 ![]() Gene: HTR2C ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
15. 5-hydroxytryptamine 7 receptor Pharmacological action: unknownActions: antagonist 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 Organism class: humanUniProt ID: P34969 ![]() Gene: HTR7 ![]() Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
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| Enzymes |
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Actions: substrate, inhibitor
Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It performs a variety of oxidation reactions (e.g. caffeine 8-oxidation, omeprazole sulphoxidation, midazolam 1'-hydroxylation and midazolam 4- hydroxylation) of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. The enzyme also hydroxylates etoposide UniProt ID: P08684![]() Gene: CYP3A4 Protein Sequence: FASTA Gene Sequence: FASTA SNPs: SNPJam Report ![]() References:
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This project is supported by Genome Alberta & Genome Canada, a not-for-profit organization that is leading Canada's national genomics strategy with $600 million in funding from the federal government. This project is also supported in part by GenomeQuest, Inc., an enterprise genomic information company serving the life science community.