Tiotixene, or thiothixene is a typical antipsychotic agent currently sold under the brand name Navane which is predominantly utilised to treat acute and chronic schizophrenia.[2] Beyond its primary indication, it can exhibit a variety of effects common to neuroleptic drugs including anxiolytic, anti-depressive, and anti-aggressive properties.[3]
The drug was first synthesized and marketed in 1967 under the pharmaceutical company Pfizer.[2][4][5][6] While the usage of the drug has declined in recent decades, the drug continues to be manufactured and prescribed in the US and Canada.[6]
Tiotixene is a widely used drug for the treatment of various psychiatric disorders such as schizophrenia, bipolar disorder, mania, and behavioural disturbances.[7] The drug regulates behaviour and thoughts, and can also exhibit an anti-depressive effect.[3][8]
The side effect profile is similar to related antipsychotic agents, displaying weight gain, mental distress, and inability to sit still. Other possible symptoms include anticholinergic side effects such as insomnia, blurred vision, and dry mouth.[9][10] Less frequently encountered side effects are drug-induced movement disorders such as Parkinson's syndrome and tardive dyskinesia.[11][12]
The results of various dose-response studies (10–60 mg) indicate a stimulating effect at lower doses, which diminishes as higher doses are administered.[13] Overall, the efficacy of thiothixene when compared to other antipsychotic drugs was evaluated to be at least as effective regardless of the optimum dosage.[13][14][15]
Pharmacology
Pharmacokinetics
As common with tricyclic psychotherapeutic agents, tiotixene is rapidly and extensively absorbed.[16] Peak serum concentration of the drug is achieved after 1–3 hours.[17] After absorption, the compound and its metabolites are spread widely throughout the body.
The drug's metabolism proceeds rapidly and primarily in the liver.[2][16] Although N-demethyltiotixene was identified as its major metabolite, the metabolic mechanisms remain elusive.[2][18] After metabolism, most of the material is excreted through the faeces.[16]
Tiotixene shares its mechanism with related thioxanthenes which are all fundamentally used to control schizophrenia. Their mechanism of action involves the inhibition of different receptors, including 5-HT (serotonin), dopaminergic, histaminergic, and adrenergic receptors.[24] Blocking these receptors results in a reduction of synaptic levels of dopamine, serotonin, and other neurotransmitters that are involved with abnormal excitement in the brain during psychoses.[24][25] This reduction of abnormal neurotransmission activity tends to alleviate the psychotic indications associated with schizophrenia.[26]
Tiotixene acts primarily as a highly potent antagonist of the dopamineD2 and D3 receptors (subnanomolar affinity).[19] It is also an antagonist of the histamineH1, α1-adrenergic, and serotonin5-HT7 receptors (low nanomolar affinity), as well as of various other receptors to a much lesser extent (lower affinity).[19] It does not have any anticholinergic activity.[19] Antagonism of the D2 receptor is thought to be responsible for the antipsychotic effects of tiotixene.
Toxicology
Thiothixene has demonstrated toxicity in animal studies and isolated human tissue, displaying cytotoxic effects against various cell types. Observed toxic effects included growth inhibition of mouse fibroblasts, inhibition of protein synthesis by human glioma cells, and inhibition of leukocyteDNA synthesis.[27][28]
Other compounds within the thioxanthene class have demonstrated hepatotoxicity in rodent experiments, and although anecdotal reports of thiothixene-induced liver failure exist, scientific data regarding the correlation lacks.[29] The absence of observational or longitudinal human studies on thiothixene in published literature precludes drawing conclusions regarding the significance of toxic effects at therapeutic dosages.
Chemistry
Thiothixene is a tricyclic compound consisting of a thioxanthene core with a (4-methylpiperazin-1-yl)propylidene side chain.[30] Several methods for the synthesis of thiothixene are described in literature, which all rely on varying thioxanthone derivatives upon which the (4-methylpiperazin-1-yl)propylidene side chain is constructed.[2][16][31]
Wyatt et al. described the synthesis of thiothixene via four different routes, three of which originated from the previous findings from Muren et al. One method described the synthesis of thiothixene by acetylation of 9-lithio-N,N-dimethylthioxanthene-2-sulfonamide. After acetylation, a condensation reaction, and an amine exchange the intermediate ketone was obtained. This intermediate was then converted into E- and Z-thiothixene through reduction with NaBH4, followed by dehydration using POCl3-pyridine.[2][31]
Another method described by Muren et al. was performed using N,N-dimethylsulfamoyl-Z-thioxanthen-9-one as starting material. The introduction of the piperazinylpropylidene side chain was performed by a Wittig reaction. Following this, the methylation of the piperazinylpropylidene side chain was executed using various alkylating agents, yielding E- and Z-thiothixene.[31]
The last method described by Wyatt et al, adapted from the study described by Muren and Bloom, used potassium benzenethiolate and 2-bromo-5-dimethylsulfamoylbenzoic acid as starting material. The resulting acid was treated with copper and PPA to form the thioxanthone intermediate. This ketone intermediate was then treated with the addition of the piperazinylpropylidene side chain and the loss of a water molecule to form Z- and E-Thiothixene.[2]
The fourth method originating from D.C Hobbs involved condensing thiophenol with 2-chloro-5-dimethylsulfamoylbenzoic acid in an alkaline DMF solution at 130–140 °C. After a ring closure reaction with polyphosphoric acid at 70 °C, the ketone intermediate (N,N-dimethylsulfamoyl-Z-thioxanthen-9-one) was obtained. A wittig reaction was employed to connect the intermediate with the piperazinylpropylidene side chain, leading to the formation of both Z- and E-thiothixene isomers.[16][32]
^Xin C, Lihong W, Qiuyuan L, Hongzhuo L (July 2014). "Injectable long-term control-released in situ gels of hydrochloric thiothixene for the treatment of schizophrenia: preparation, in vitro and in vivo evaluation". International Journal of Pharmaceutics. 469 (1): 23–30. doi:10.1016/j.ijpharm.2014.04.044. PMID24751344.
^Robertson MM, Trimble MR (September 1982). "Major tranquillisers used as antidepressants. A review". Journal of Affective Disorders. 4 (3): 173–193. doi:10.1016/0165-0327(82)90002-7. PMID6127357.
^Sarai K, Okada M (February 1987). "Comparison of efficacy of zotepine and thiothixene in schizophrenia in a double-blind study". Pharmacopsychiatry. 20 (1 Spec No): 38–46. doi:10.1055/s-2007-1017128. PMID2883680. S2CID20384816.
^Overall JE, Hollister LE, Shelton J, Kimbell I, Pennington V (January 1969). "Broad-spectrum screening of psychotherapeutic drugs: thiothixene as an antipsychotic and antidepressant". Clinical Pharmacology and Therapeutics. 10 (1): 36–43. doi:10.1002/cpt196910136. PMID4884295. S2CID23287102.
^Yesavage JA, Tanke ED, Sheikh JI (October 1987). "Tardive dyskinesia and steady-state serum levels of thiothixene". Archives of General Psychiatry. 44 (10): 913–915. doi:10.1001/archpsyc.1987.01800220085012. PMID2889439.
^Gallant DM, Bishop MP, Shelton W (September 1966). "A preliminary evaluation of P-4657B: a thioxanthene derivative". The American Journal of Psychiatry. 123 (3): 345–346. doi:10.1176/ajp.123.3.345. PMID5921658.
^Hobbs DC, Welch WM, Short MJ, Moody WA, Van der Velde CD (September 1974). "Pharmacokinetics of thiothixene in man". Clinical Pharmacology and Therapeutics. 16 (3): 473–478. doi:10.1002/cpt1974163part1473. PMID4415039. S2CID42200908.
^ abcdefghijklmnopqrsSilvestre JS, Prous J (June 2005). "Research on adverse drug events. I. Muscarinic M3 receptor binding affinity could predict the risk of antipsychotics to induce type 2 diabetes". Methods and Findings in Experimental and Clinical Pharmacology. 27 (5): 289–304. doi:10.1358/mf.2005.27.5.908643. PMID16082416.
^ abcBurstein ES, Ma J, Wong S, Gao Y, Pham E, Knapp AE, et al. (December 2005). "Intrinsic efficacy of antipsychotics at human D2, D3, and D4 dopamine receptors: identification of the clozapine metabolite N-desmethylclozapine as a D2/D3 partial agonist". The Journal of Pharmacology and Experimental Therapeutics. 315 (3): 1278–1287. doi:10.1124/jpet.105.092155. PMID16135699. S2CID2247093.
^ abGao S, Han L, Luo D, Xiao Z, Liu G, Zhang Y, et al. (June 2022). "Deep learning applications for the accurate identification of low-transcriptional activity drugs and their mechanism of actions". Pharmacological Research. 180: 106225. doi:10.1016/j.phrs.2022.106225. PMID35452801. S2CID248309731.
^Abernathy CO, Zimmerman HJ (November 1975). "The toxicity of thioxanthene neuroleptics to isolated rat liver cells". Proceedings of the Society for Experimental Biology and Medicine. 150 (2): 385–389. doi:10.3181/00379727-150-39041. PMID1208553. S2CID21403569.
^Noori Tahneh A, Bagheri Novir S, Balali E (November 2017). "Density functional theory study of structural and electronic properties of trans and cis structures of thiothixene as a nano-drug". Journal of Molecular Modeling. 23 (12): 356. doi:10.1007/s00894-017-3522-6. PMID29177682. S2CID27183246.
Kota Bersejarah GyeongjuSitus Warisan Dunia UNESCOKriteriaKultural: ii, iiiNomor identifikasi976Pengukuhan2000 (Ke-24) Kota Bersejarah GyeongjuHangul경주 역사유적 지구 Hanja慶州歷史遺蹟地區 Alih AksaraGyeongju Yeoksayujeok jiguMcCune–ReischauerKyǒngju Yǒksayujǒk jigu Kota Bersejarah Gyeongju adalah daftar Situs Warisan Dunia milik Korea Selatan yang dimasukkan oleh UNESCO pada tahun 2000. Wilayah yang dilindungi mencakup daerah-daerah yang memiliki peninggalan-pening...
BudimanDidirikan1992; 32 tahun lalu (1992)PendiriH. Saleh BudimanKantor pusatJl. Ir. H. Juanda no. 31, Indihiang, Tasikmalaya, Jawa BaratWilayah layananJawaJenis layananBus AntarkotaBus PariwisataShuttleTaksiKargoKelasKelas SatuKelas PrimerEksekutifBisnisGarasiTasikmalaya, Bandung, Banjarsari, Karangpucung dan PangandaranArmadaMercedes-BenzRute terpendekBandung-TasikmalayaRute terpanjangSukabumi-YogyakartaJenis bahan bakarSolarOperatorPT HS Budiman 45CEODede SudrajatSitus webSitus resmi ...
Lazio beralih ke halaman ini. Untuk tim sepak bola kota ini, lihat S.S. Lazio. Untuk daerah kuno wilayah ini dalam bahasa Latin, lihat Latium. Lazio LatiumRegion BenderaLambang kebesaranNegaraItaliaIbukotaRomaPemerintahan • PresidentFrancesco Rocca (Independent (center-right))Luas • Total17.242 km2 (6,657 sq mi)Populasi (31 December 2021)[1] • Total5.714.882 • Kepadatan0,00.033/km2 (0,00.086/sq mi)DemonimInggris:...
Mars life detection experiments Schematic of the Viking Lander Biological Experiment System In 1976 two identical Viking program landers each carried four types of biological experiments to the surface of Mars. The first successful Mars landers, Viking 1 and Viking 2, then carried out experiments to look for biosignatures of microbial life on Mars. The landers each used a robotic arm to pick up and place soil samples into sealed test containers on the craft. The two landers carried out the sa...
American politician Marie WaldronMinority Leader of the California AssemblyIn officeNovember 8, 2018 – February 8, 2022Preceded byBrian DahleSucceeded byJames GallagherMember of the California State Assemblyfrom the 75th districtIncumbentAssumed office December 3, 2012Preceded byNathan Fletcher Personal detailsBornMarie P. McGowan[1] (1960-03-28) March 28, 1960 (age 64)[2][3]New York City, New York, U.S.Political partyRepublicanSpouse1Children1Educa...
Headland in Pembrokeshire, Wales St David's Head Penmaen DewiheadlandLocation in WalesCoordinates: 51°54′10″N 5°18′45″W / 51.902778°N 5.3125°W / 51.902778; -5.3125LocationPembrokeshire, Wales Coetan Arthur burial chamber Carn Llidi from St David's Head St David's Head (Welsh: Penmaen Dewi) is a headland in the Pembrokeshire Coast National Park, southwest Wales, which marks the divide between the Irish Sea and the Celtic Sea. It is noted for its wildflowers ...
This article contains content that is written like an advertisement. Please help improve it by removing promotional content and inappropriate external links, and by adding encyclopedic content written from a neutral point of view. (May 2024) (Learn how and when to remove this message) Used car e-commerce company based in Arizona, United States Not to be confused with Carvanha. Carvana Co.One of the 39 car vending machines across the countryCompany typePublicTraded asNYSE: CVNA (Class A)R...
Примеры текста: без кернинга (вверху), с кернингом (внизу) Ке́рнинг (англ. kerning) при наборе текста — избирательное изменение интервала между буквами в зависимости от их формы. Технология автоматического кернинга, появившаяся в полиграфии после внедрения фотонабора ...
British broadcaster and politician (born 1967) The Right HonourableEd BallsOfficial portrait, 2021Secretary of State for Children, Schools and FamiliesIn office28 June 2007 – 11 May 2010Prime MinisterGordon BrownPreceded byAlan JohnsonSucceeded byMichael GoveEconomic Secretary to the TreasuryIn office6 May 2006 – 28 June 2007Prime MinisterTony BlairPreceded byIvan LewisSucceeded byKitty UssherMember of Parliamentfor Morley and OutwoodNormanton (2005–2010)In office5 May...
الموسيقى الكارناتيكيةمعلومات عامةالبلد قالب:بيانات بلد كرناتكا النشأة والظهور القرن 11 أصول الأسلوب موسيقى كلاسيكية هندية تعديل - تعديل مصدري - تعديل ويكي بيانات موسيقى الهندسيدة تعزف على آلة تانبورا سنة ١٧٣٥ (راجستان) النوع التقليدي موسيقى كلاسيكية هندية كارناتيك هندوست...
عامر حسني لطفي معلومات شخصية الميلاد سنة 1956 حمص تاريخ الوفاة 21 مارس 2018 (61–62 سنة) مواطنة سوريا الحياة العملية المهنة سياسي الحزب حزب البعث العربي الاشتراكي اللغات العربية تعديل مصدري - تعديل عامر حسني لطفي (مواليد 1956 في حمص)، وزير الاقتصاد والتج...
Optical phenomenon resulting from burning sulfur Blue lava as seen at night on Kawah Ijen, in Indonesia Blue lava, also known as Api Biru,[1] and simply referred to as blue fire or sulfur fire, is a phenomenon that occurs when sulfur burns. It is an electric-blue flame that has the illusory appearance of lava. Despite the name, the phenomenon is actually a sulfuric fire that resembles the appearance of lava, rather than actual lava from a volcanic eruption. The most well-documented of...
This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources.Find sources: UCL Prize Lecture in Life and Medical Sciences – news · newspapers · books · scholar · JSTOR (July 2013) The UCL Prize Lecture in Life and Medical Sciences (previously UCL Prize Lecture in Clinical Science) is a prize awarded annually by University C...
French manufacturer and retailer of ice cream BerthillonLogoIndustrymanufacture of ice creams and sorbets Founded7 May 1985 FounderBerthillonHeadquartersÎle Saint-Louis, Paris, France Berthillon is a French manufacturer and retailer of luxury ice cream and sorbet, with its primary store on the Île Saint-Louis, in Paris, France. The company is owned and operated by the Chauvin family, descendants of the eponymous Monsieur Berthillon, who from 1954 operated a café and hotel called ...
Comune in Piedmont, ItalySan Maurizio d'OpaglioComuneComune di San Maurizio d'OpaglioSan Maurizio d'OpaglioLocation of San Maurizio d'Opaglio San Maurizio d'OpaglioLocation of San Maurizio d'Opaglio in ItalyShow map of ItalySan Maurizio d'OpaglioSan Maurizio d'Opaglio (Piedmont)Show map of PiedmontCoordinates: 45°46′N 8°23′E / 45.767°N 8.383°E / 45.767; 8.383CountryItalyRegionPiedmontProvinceNovara (NO)FrazioniSazza, Pascolo, Lagna, Alpiolo, Opagliolo, Bacchior...
Voce principale: FA Community Shield. FA Charity Shield 1991Supercoppa d'Inghilterra 1991 Competizione FA Community Shield Sport Calcio Edizione 69ª Organizzatore The FA Date 10 agosto 1991 Luogo Inghilterra Risultati Vincitore Arsenal eTottenham(8º e 7º titolo) Statistiche Incontri disputati 1 Gol segnati 0 (0 per incontro) Pubblico 65 483 (65 483 per incontro) Cronologia della competizione 1990 1992 Manuale Lo FA Charity Shield 1991, noto in italiano anche come Supe...
American politician George Washington HoukMember of the U.S. House of Representativesfrom Ohio's 3rd districtIn officeMarch 4, 1891 – February 9, 1894Preceded byElihu S. WilliamsSucceeded byPaul J. SorgMember of the Ohio House of Representativesfrom the Montgomery County districtIn officeJanuary 5, 1852 – January 1, 1854Serving with Daniel BeckelPreceded byThomas DoddsJohn E. ThomsSucceeded byWilliam GoudyMarcus T. Parrott Personal details...
Governmental subdivision in France Map of the prefectures in France with their INSEE number In France, a prefecture (French: préfecture, pronounced [pʁefɛktyʁ] ⓘ) may be:[1][2] the chef-lieu de département, the commune in which the administration of a department is located; the chef-lieu de région, the commune in which the administration of a region is located; the jurisdiction of a prefecture; the official residence or headquarters of a prefect. Although the a...