Tazomeline is a selective M1 muscarinic receptor agonist. Tazomeline inhibits twitch height in rabbit vas deferens(IC50= 0.001 nM). Tazomeline can be used for research of neuropsychiatric disorders[1].
Oxotremorine sesquifumarate is a mAChR agonist that mainly activates M2 receptors. Oxotremorine sesquifumarate can be used for neurological research[1][2].
Methacholine (Acetyl-β-methylcholine) bromide is a potent muscarinic-3 (M3) agonist. Methacholine bromide acts directly on acetylcholine receptors on smooth muscle causing bronchoconstriction and airway narrowing. Methacholine bromide shows a high sensitivity to identify bronchial hyperresponsiveness (BHR). Methacholine bromide can be used to measure airway hyperresponsiveness (AHR) as a diagnostic aid in the assessment of individuals with asthma-like symptoms and normal resting expiratory flow rates[1][2][3][4].
Anisotropine methobromide is an orally active anticholinergic muscarinic antagonist. Anisotropine methobromide can inhibit gastric acid secretion and is used as an adjunct to peptic ulcers[1].
Cyclobuxine D is a steroidal alkaloid extracted from Buxus microphylla. Cyclobuxine D has a significant bradycardic effect in the rat heart and an inhibitory action on acetylcholine and Ba++−induced contraction of the longitudinal muscle isolated from the rabbit jejunum[1][2].
β2AR/M3-receptor agonist-1 (example 9) is a potent β2AR and M3 receptor agonist. β2AR/M3-receptor agonist-1 shows M3 receptor affinity with a pIC50 value of 9.3. β2AR/M3-receptor agonist-1 has the potential for the research of respiratory tract disorders[1].
Ambutonium bromide is an acetylcholine antagonist.
Arecaidine but-2-ynyl ester tosylate is a potent muscarinic agonist that shows 4.6-fold that is selectivity for mAChR M2 in the atrium versus those in the ileum.
Afacifenacin (SMP-986) is a potent and orally active muscarinic receptor antagonist. Afacifenacin inhibits the bladder afferent pathway through the sodium-channel blockade, increasing volume, and reducing the frequency of urination and incontinence. Afacifenacin has the potential for the research of overactive bladder (OAB)[1][2].
α-Conotoxin M I is a potent and selective inhibitor of mAChR and α1β1γδ nAChR, but has no effect on nicotine-stimulated dopamine release. α-Conotoxins are small, disulfide-rich peptides that competitively inhibit muscle and neuronal nicotinic AChRs[1][2].
Arborine, isolated from Glycosmis arborea, inhibits the peripheral action of acetylcholine and induces a fall in blood pressure[1][1].
Pilocarpine nitrate is a selective M3-type muscarinic acetylcholine receptor (M3 muscarinic receptor) agonist.
Methapyrilene is a histamine antagonist, a pyridine chemical with anticholinergic activity. Methapyrilene can cause target organ-specific epigenetic alterations, such as a decrease in DNA methylation levels. Methapyrilene induces hepatocellular carcinoma in rats[1][2].
Telenzepine is an antimuscarinic agent with Kis of 0.94 nM (M1 mAChR) and 17.8 nM (M2 mAChR) binding to muscarinic receptors. Telenzepine effectively blocks synaptic transmission promoted by muscarinic or M1 receptor agonists. Thus, Telenzepine can reduce the amplitude of extracellular slow excitatory postsynaptic potentials (EC50=38 nM) and slow inhibitory postsynaptic potentials (EC50=253 nM)[1].
RHC 80267 (U-57908) is a potent and selective inhibitor of diacylglycerol lipase (DAGL) (with IC50 of 4 μM in canine platelets). RHC-80267 inhibits cholinesterase activity with an IC50 of 4 μM, thereby enhancing the relaxation evoked by acetylcholine. RHC 80267 also inhibits COX and the hydrolysis of phosphatidylcholine (PC)[1][2][3][4].
Rac-VU 6008667 is a selective negative allosteric modulator of muscarinic acetylcholine receptor subtype 5 (M5 NAM) with IC50s of 1.2 μM and 1.6 μM for human M5 and rat M5, respectively. Rac-VU 6008667 has high CNS penetration[1].
TAK-071 is a novel muscarinic acetylcholine receptor 1 (M1R) positive allosteric modulator. EC50 of TAK-071 M1R agonist activities is 520 nM[1].
Cevimeline hydrochloride hemihydrate, a novel muscarinic receptor agonist, is a candidate therapeutic drug for xerostomia in Sjogren's syndrome. IC50 value:Target: mAChRThe general pharmacol. properties of this drug on the gastrointestinal, urinary, and reproductive systems and other tissues were investigated in mice, rats, guinea pigs, rabbits, and dogs. The in vitro metab. of SNI-2011 was also evaluated with rat and dog liver microsomes. After oral administration, plasma concns. of SNI-2011 reached to Cmax within 1 h in both species, suggesting that SNI-2011 was quickly absorbed, and then decreased with a t1/2 of 0.4-1.1 h. The bioavailability was 50% and 30% in rats and dogs, resp. Major metabolites in plasma were both S- and N-oxidized metabolites in rats and only N-oxidized metabolite in dogs, indicating that a large species difference was obsd. in the metab. of SNI-2011. Sex difference was also obsd. in the pharmacokinetics of SNI-2011 in rats, but not in dogs. In the in vitro study, chem. inhibition and pH-dependent studies revealed that the sulfoxidn. and N-oxidn. of SNI-2011 were mediated by cytochrome P 450 (CYP) and flavin-contg. monooxygenase (FMO), resp., in both species. In addn., CYP2D and CYP3A were mainly responsible for the sulfoxidn. in rat liver microsomes.
Perlapine is a potent muscarinic DREADD (Designer Receptors Exclusively Activated by Designer Drugs) agonist Perlapine exhibits >10000-fold selectivity for hM3Dq over hM3 receptors[1].
Benzetimide hydrochloride is a muscarinic acetylcholine receptor antagonist. Target: mAChR
Flavoxate-d4 hydrochloride (Rec-7-0040-d4) is the deuterium labeled Flavoxate hydrochloride. Flavoxate Hydrochloride is a muscarinic AChR antagonist used in various urinary syndromes and as an antispasmodic[1][2].
Biperiden (KL 373) lactate is an orally active non-selective muscarinic receptor antagonist that competitively binds to M1 muscarinic receptors. Biperiden (KL 373) lactate inhibits acetylcholine and enhances dopamine signaling in the central nervous system. Biperiden (KL 373) lactate has the potential for the research of Parkinson's disease and other related psychiatric disorders[1][2].
Fesoterodine L-mandelate is an orally active, nonsubtype selective, competitive muscarinic receptor (mAChR) antagonist with pKi values of 8.0, 7.7, 7.4, 7.3, 7.5 for M1, M2, M3, M4, M5 receptors, respectively. Fesoterodine L-mandelate is used for the overactive bladder (OAB)[1][2].
Anisodamine hydrobromide (6-Hydroxyhyoscyamine hydrobromide), a belladonna alkaloid, is a non-subtype-selective muscarinic, and also a nicotinic cholinoceptor antagonist. Anisodamine hydrobromide employs in traditional Chinese medicine for many ailments, mainly to improve the microcirculation in states of shock, and also in organophosphate poisoning[1].
SA504 is an anticholinergic agent.
PF-06827443 (PF06827443) is a potent, orally bioavailable, and CNS-penetrant M1-selective positive allosteric modulator (PAM) with EC50 of 47 nM, shows no activity against M2-M5 at 10 uM; induces cholinergic adverse events and convulsion at therapeutic indices similar to previous compounds with more agonist activity.
Trans-Cevimeline (AF102A) (hydrochloride), as a trans-isomer of AF102B, is a M1 selective cholinergic agonist. Trans-Cevimeline (AF102A) (hydrochloride) can be used for the research of Alzheimer's disease[1].
Imidafenacin(KRP-197; ONO-8025) is a potent and selective inhibitor of M3 receptors with Kb of 0.317 nM; less potent for M2 receptors(IC50=4.13 nM).IC50 value: 0.3 nM(M3) [1]in vitro: KRP-197 showed equipotent anti-M2 and anti-M3 activity and decreased subtype-selectivity [1]. in vivo: Intraduodenal administration of KRP-197 (0.04±0.30 mg/kg) inhibited bladder contraction dose-dependently, and the ED30 value was 0.11 mg/kg. The inhibitory action of KRP-197 on the bladder contraction was 19 times as potent as that of oxybutynin. KRP-197 showed preventive action againstthe decrease in bladder capacity induced by carbachol(ED50 0.074 mg/kg, intragastric administration), andthe potency of the inhibitory action was 15-fold greaterthan that of oxybutynin [1]. The learning-inhibitory doses of intravenous oxybutynin hydrochloride and tolterodine tartrate were 0.3 and 3 mg/kg in sham-operated rats and 0.1 and 1 mg/kg in nbM-lesioned rats, respectively. Thus, the learning impairments by those antimuscarinics were more sensitive in nbM-lesioned rats than in sham-operated rats. On the other hand, intravenous administration of imidafenacin had no influence on learning in either case of the rats. In normal rats, however, intracerebroventricular administration of imidafenacin impaired learning to the same degree as that of oxybutynin hydrochloride [2].
Umeclidinium bromide is a novel mAChR antagonist. The affinity (Ki) of Umeclidinium bromide for the cloned human M1-M5 mAChRs ranges from 0.05 to 0.16 nM.
(±)-Darifenacin-d4 is deuterium labeled (±)-Darifenacin. (±)-Darifenacin is the racemate of Darifenacin. Darifenacin is a selective M3 muscarinic receptor antagonist[1].