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Other names | SEP-363856; SEP363856; SEP-856; SEP856 |
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Formula | C9H13NOS |
Molar mass | 183.27 g·mol−1 |
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Ulotaront (INN ; [1] developmental codes SEP-363856, SEP-856) is an investigational antipsychotic that is undergoing clinical trials for the treatment of schizophrenia and Parkinson's disease psychosis. [2] [3] The medication was discovered in collaboration between PsychoGenics Inc. and Sunovion Pharmaceuticals [2] (which was subsequently merged into Sumitomo Pharma [4] ) using PsychoGenics' behavior and AI-based phenotypic drug discovery platform, SmartCube. [5]
Ulotaront is in phase III clinical trial for schizophrenia, phase II/III for generalised anxiety disorder and major depressive disorder and discontinued for narcolepsy and psychotic disorders. [6]
Research has shown that ulotaront results in a greater reduction from baseline in the PANSS total score than placebo. [7] Treatment with ulotaront, as compared with placebo, was also associated with an improvement in sleep quality. [7] Ulotaront was awarded a Breakthrough Therapy designation due to its increased efficacy and greatly reduced side effects compared to current treatments. [8]
The adverse effect profile of ulotaront differs from that of other antipsychotics because its mechanism of action does not involve antagonism of dopamine receptors in the brain, which is responsible for the drug-induced movement disorders (like akathisia) that may occur with those agents. [9] Some adverse events reported in preliminary clinical trials are somnolence, agitation, nausea, diarrhea, and dyspepsia. [9]
The mechanism of action of ulotaront in the treatment of schizophrenia is unclear. However, it is thought to be an agonist at the trace amine-associated receptor 1 (TAAR1) and serotonin 5-HT1A receptors. [2] [10] This mechanism of action is unique among available antipsychotics, which generally antagonize dopamine receptors (especially dopamine D2 receptor). [11] [12]
Ulotaront is a full agonist of the human TAAR1 with an EC50 of 140 nM and an Emax of 101.3%. [12] It is also a partial agonist of the serotonin 5-HT1A receptor (EC50 = 2,300 nM; Emax = 74.7%) and of the serotonin 5-HT1D receptor (EC50 = 262 nM; Emax = 57.1%). [12] Conversely, its activities at various other targets, such as various other serotonin receptors as well as adrenergic and dopamine receptors, are much less potent. [12]
Ulotaront decreases basal locomotor activity in rodents and this effect was absent in TAAR1 knockout mice. [13] It prevented the hyperlocomotion induced by the NMDA receptor antagonist phencyclidine (PCP). [13] [14] [12] Conversely, ulotaront did not affect dextroamphetamine-induced hyperlocomotion. [13] [14] Similarly, it did not reverse apomorphine-induced climbing behavior. [13]
The precise pharmacokinetic profile of ulotaront has not been reported, though the developer has suggested that the pharmacokinetic data supports once daily dosing. [10]
As of 2018, Sunovion, the maker of another antipsychotic called lurasidone (Latuda), is conducting clinical trials on ulotaront in partnership with the preclinical research company PsychoGenics. [3] [15] [16] The U.S. Food and Drug Administration has granted ulotaront the breakthrough therapy designation. [10] [17] In addition to schizophrenia, ulotaront is also being studied for the treatment of psychosis associated with Parkinson's disease. [17]
The Brief Negative Symptom Scale (BNSS) has been used to assess the effect of Ulotaront on the negative symptoms of schizophrenia. [18]
In July 2023, the pharmaceutical company behind the drug announced that the drug had failed to outperform placebo in the treatment of acutely psychotic patients with schizophrenia, as measured by the PANSS. [19]
The atypical antipsychotics (AAP), also known as second generation antipsychotics (SGAs) and serotonin–dopamine antagonists (SDAs), are a group of antipsychotic drugs largely introduced after the 1970s and used to treat psychiatric conditions. Some atypical antipsychotics have received regulatory approval for schizophrenia, bipolar disorder, irritability in autism, and as an adjunct in major depressive disorder.
Aripiprazole, sold under the brand names Abilify and Aristada, among others, is an atypical antipsychotic primarily used in the treatment of schizophrenia, bipolar disorder, and irritability associated with autism spectrum disorder; other uses include as an add-on treatment for major depressive disorder and tic disorders. Aripiprazole is taken by mouth or via injection into a muscle. A Cochrane review found low-quality evidence of effectiveness in treating schizophrenia.
Dopaminergic means "related to dopamine", a common neurotransmitter. Dopaminergic substances or actions increase dopamine-related activity in the brain.
Amisulpride, sold under the brand names Solian and Barhemsys, is a medication used in the treatment of schizophrenia, acute psychotic episodes, depression, and nausea and vomiting. It is specifically used at lower doses intravenously to prevent and treat postoperative nausea and vomiting; at low doses by mouth to treat depression; and at higher doses by mouth to treat psychosis.
Trace amine-associated receptors (TAARs), sometimes referred to as trace amine receptors, are a class of G protein-coupled receptors that were discovered in 2001. TAAR1, the first of six functional human TAARs, has gained considerable interest in academic and proprietary pharmaceutical research due to its role as the endogenous receptor for the trace amines phenethylamine, tyramine, and tryptamine – metabolic derivatives of the amino acids phenylalanine, tyrosine and tryptophan, respectively – ephedrine, as well as the synthetic psychostimulants, amphetamine, methamphetamine and methylenedioxymethamphetamine. In 2004, it was shown that mammalian TAAR1 is also a receptor for thyronamines, decarboxylated and deiodinated relatives of thyroid hormones. TAAR2–TAAR9 function as olfactory receptors for volatile amine odorants in vertebrates.
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Iloperidone, sold under the brand name Fanapt among others, is an atypical antipsychotic for the treatment of schizophrenia and bipolar I disorder.
Dopamine receptor D2, also known as D2R, is a protein that, in humans, is encoded by the DRD2 gene. After work from Paul Greengard's lab had suggested that dopamine receptors were the site of action of antipsychotic drugs, several groups, including those of Solomon H. Snyder and Philip Seeman used a radiolabeled antipsychotic drug to identify what is now known as the dopamine D2 receptor. The dopamine D2 receptor is the main receptor for most antipsychotic drugs. The structure of DRD2 in complex with the atypical antipsychotic risperidone has been determined.
Trace amine-associated receptor 1 (TAAR1) is a trace amine-associated receptor (TAAR) protein that in humans is encoded by the TAAR1 gene.
Perospirone (Lullan) is an atypical antipsychotic of the azapirone family. It was introduced in Japan by Dainippon Sumitomo Pharma in 2001 for the treatment of schizophrenia and acute cases of bipolar mania.
Pimavanserin, sold under the brand name Nuplazid, is an atypical antipsychotic which is approved for the treatment of Parkinson's disease psychosis. It is taken by mouth.
Dasotraline is a serotonin-norepinephrine-dopamine reuptake inhibitor (SNDRI) that was under development by Sunovion for the treatment of attention-deficit hyperactivity disorder (ADHD) and binge eating disorder (BED). Structurally, dasotraline is a stereoisomer of desmethylsertraline (DMS), which is an active metabolite of the marketed selective serotonin reuptake inhibitor (SSRI) antidepressant sertraline (Zoloft).
Pomaglumetad (LY-404,039) is an amino acid analog drug that acts as a highly selective agonist for the metabotropic glutamate receptor group II subtypes mGluR2 and mGluR3. Pharmacological research has focused on its potential antipsychotic and anxiolytic effects. Pomaglumetad is intended as a treatment for schizophrenia and other psychotic and anxiety disorders by modulating glutamatergic activity and reducing presynaptic release of glutamate at synapses in limbic and forebrain areas relevant to these disorders. Human studies investigating therapeutic use of pomaglumetad have focused on the prodrug LY-2140023, a methionine amide of pomaglumetad (also called pomaglumetad methionil) since pomaglumetad exhibits low oral absorption and bioavailability in humans.
Tiospirone (BMY-13,859), also sometimes called tiaspirone or tiosperone, is an atypical antipsychotic of the azapirone class. It was investigated as a treatment for schizophrenia in the late 1980s and was found to have an effectiveness equivalent to those of typical antipsychotics in clinical trials but without causing extrapyramidal side effects. However, development was halted and it was not marketed. Perospirone, another azapirone derivative with antipsychotic properties, was synthesized and assayed several years after tiospirone. It was found to be both more potent and more selective in comparison and was commercialized instead.
Roxindole (EMD-49,980) is a dopaminergic and serotonergic drug which was originally developed by Merck KGaA for the treatment of schizophrenia. In clinical trials its antipsychotic efficacy was only modest but it was unexpectedly found to produce potent and rapid antidepressant and anxiolytic effects. As a result, roxindole was further researched for the treatment of depression instead. It has also been investigated as a therapy for Parkinson's disease and prolactinoma.
Cariprazine, sold under the brand name Vraylar among others, is an atypical antipsychotic developed by Gedeon Richter, which is used in the treatment of schizophrenia and bipolar disorder. It is also prescribed as an add-on treatment for bipolar depression and major depressive disorder. Cariprazine acts primarily as a D3 and D2 receptor partial agonist, with a preference for the D3 receptor. It is a partial agonist at the serotonin 5-HT1A receptor and acts as an antagonist at 5-HT2B and 5-HT2A receptors. It is taken by mouth. The most prevalent side effects include nausea, mild sedation, fatigue, and dizziness. At higher dosages, there is an increased risk for restlessness, insomnia, and tremors.
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Proposed INN: List 124 – COVID-19 (special edition)