Itameline
Muscarinic agonist
Pharmaceutical compound
Itameline (INN Tooltip International Nonproprietary Name ; developmental code name RU-47213 ) is a non-selective muscarinic acetylcholine receptor agonist which was under development for the treatment of Alzheimer's disease and memory disorders but was never marketed.[ 1] [ 2] [ 3] It has been referred to as a "nootropic " (cognitive enhancer).[ 4] [ 5]
The drug is a prodrug of RU-35963 , an arecoline derivative .[ 6] [ 7] [ 2] It is an agonist of the muscarinic acetylcholine M1 receptor as well as of other muscarinic acetylcholine receptors.[ 8] [ 6] [ 9] [ 7] [ 2] Itameline is described as being superior to arecoline in terms of potency , central selectivity , and duration of action .[ 6] [ 7] The drug shows antiamnesic effects in animals, for instance reversing scopolamine -induced memory deficits .[ 10] [ 6] [ 2] [ 3] Structurally , it is a tetrahydropyridine similarly to xanomeline and milameline .
Itameline was first described in the scientific literature by 1992.[ 3] It was under development by Hoechst Marion Roussel and reached phase 2 clinical trials by 1998 prior to the discontinuation of its development.[ 12] [ 7] [ 4]
References
^ "Delving into the Latest Updates on Itameline with Synapse" . Synapse . 28 September 2024. Retrieved 26 October 2024 .
^ a b c d M'Harzi M, Willig F, Gieules C, Palou AM, Oberlander C, Barzaghi F (April 1997). "Ameliorating effects of RU 47213, a novel oral and long-lasting cholinomimetic agent, on working memory impairments in rats". Pharmacology, Biochemistry, and Behavior . 56 (4): 663–668. doi :10.1016/s0091-3057(96)00423-6 . PMID 9130292 .
^ a b c Toja E, Bonetti C, Butti A, Hunt P, Fortin M, Barzaghi F, et al. (1992). "1-substituted-1,2,5,6-tetrahydropyridine-3-carboxaldehyde-O-alkyloximes as novel orally active and long-lasting muscarinic cholinergic agonists". European Journal of Medicinal Chemistry . 27 (5). Elsevier BV: 519–526. doi :10.1016/0223-5234(92)90186-5 . ISSN 0223-5234 .
^ a b Froestl W, Muhs A, Pfeifer A (2012). "Cognitive enhancers (nootropics). Part 1: drugs interacting with receptors". Journal of Alzheimer's Disease . 32 (4): 793–887. doi :10.3233/JAD-2012-121186 . PMID 22886028 .
^ Fischer F, Matthisson M, Herrling P (2004). "List of drugs in development for neurodegenerative diseases". Neuro-Degenerative Diseases . 1 (1): 50–70. doi :10.1159/000077879 . PMID 16908974 .
^ a b c d Camps P, Muñoz-Torrero D (February 2002). "Cholinergic drugs in pharmacotherapy of Alzheimer's disease". Mini Reviews in Medicinal Chemistry . 2 (1): 11–25. doi :10.2174/1389557023406638 . PMID 12369954 .
^ a b c d Saklani A, Kutty SK (February 2008). "Plant-derived compounds in clinical trials". Drug Discovery Today . 13 (3–4): 161–171. doi :10.1016/j.drudis.2007.10.010 . PMID 18275914 .
^ Palma JA (February 2024). "Muscarinic control of cardiovascular function in humans: a review of current clinical evidence" . Clinical Autonomic Research . 34 (1): 31–44. doi :10.1007/s10286-024-01016-5 . PMC 10994193 . PMID 38305989 .
^ Korczyn AD (October 2000). "Muscarinic M(1) agonists in the treatment of Alzheimer's disease". Expert Opinion on Investigational Drugs . 9 (10): 2259–2267. doi :10.1517/13543784.9.10.2259 . PMID 11060805 .
^ Deiana S, Platt B, Riedel G (August 2011). "The cholinergic system and spatial learning". Behavioural Brain Research . 221 (2): 389–411. doi :10.1016/j.bbr.2010.11.036 . PMID 21108971 .
^ Eglen RM, Hegde SS (1998). "Selective modulation of muscarinic receptor subtypes: therapeutic potential". Emerging Drugs . 3 (1). Informa Healthcare: 67–80. doi :10.1517/14728214.3.1.67 . ISSN 1361-9195 .
mAChRs Tooltip Muscarinic acetylcholine receptors
Agonists Antagonists
3-Quinuclidinyl benzilate
4-DAMP
Aclidinium bromide (+formoterol )
Abediterol
AF-DX 250
AF-DX 384
Ambutonium bromide
Anisodamine
Anisodine
Antihistamines (first-generation) (e.g., brompheniramine , buclizine , captodiame , chlorphenamine (chlorpheniramine) , cinnarizine , clemastine , cyproheptadine , dimenhydrinate , dimetindene , diphenhydramine , doxylamine , meclizine , mequitazine , perlapine , phenindamine , pheniramine , phenyltoloxamine , promethazine , propiomazine , triprolidine )
AQ-RA 741
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Benactyzine
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BIBN 99
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CAR-226,086
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CAR-302,196
CAR-302,282
CAR-302,368
CAR-302,537
CAR-302,668
Caramiphen
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Clidinium bromide
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CS-27349
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Darifenacin
DAU-5884
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DIBD
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Dihexyverine
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Drofenine
EA-3167
EA-3443
EA-3580
EA-3834
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Fenpiverinium
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Glycopyrronium bromide (+beclometasone/formoterol , +indacaterol , +neostigmine )
Hexahydrodifenidol
Hexahydrosiladifenidol
Hexbutinol
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HL-031,120
Homatropine
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Isopropamide
J-104,129
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Mamba toxin 3
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Muscarinic toxin 7
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PBID
PD-102,807
PD-0298029
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pFHHSiD
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Propiverine
Quinidine
3-Quinuclidinyl thiochromane-4-carboxylate
Revefenacin
Rociverine
RU-47,213
SCH-57,790
SCH-72,788
SCH-217,443
Scopolamine (hyoscine)
Scopolamine butylbromide (hyoscine butylbromide)
Silahexacyclium
Sofpironium bromide
Solifenacin
SSRIs Tooltip Selective serotonin reuptake inhibitors (e.g., femoxetine , paroxetine )
Telenzepine
Terodiline
Tetracyclic antidepressants (e.g., amoxapine , maprotiline , mianserin , mirtazapine )
Tiemonium iodide
Timepidium bromide
Tiotropium bromide
Tiquizium bromide
Tofenacin
Tolterodine
Tricyclic antidepressants (e.g., amitriptyline (+perphenazine ), amitriptylinoxide , butriptyline , cidoxepin , clomipramine , desipramine , desmethyldesipramine , dibenzepin , dosulepin (dothiepin) , doxepin , imipramine , lofepramine , nitroxazepine , northiaden (desmethyldosulepin) , nortriptyline , protriptyline , quinupramine , trimipramine )
Tridihexethyl
Trihexyphenidyl
Trimebutine
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Tropacine
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Tropicamide
Trospium chloride
Typical antipsychotics (e.g., chlorpromazine , chlorprothixene , cyamemazine (cyamepromazine) , loxapine , mesoridazine , thioridazine )
Umeclidinium bromide (+vilanterol )
WIN-2299
Xanomeline
Zamifenacin
Precursors (and prodrugs )