scopolamine

Scopolamine is a high-affinity (nanomolar level) muscarinic receptor antagonist that can reversibly inhibit 5-HT₃ receptor responses (IC₅₀ = 2.09 μM). It is commonly used to induce animal models of Alzheimer's disease or memory impairment.

Scopolamine hydrobromide is a tropane alkaloid derived from the Solanaceae family. It is a high-affinity (nanomolar level) muscarinic receptor antagonist and can also reversibly inhibit 5-HT₃ receptor responses (IC₅₀ = 2.09 μM). It is commonly used to induce animal models of Alzheimer's disease or memory impairment.

Methscopolamine (Hyoscine methyl bromide) (Pamine), as a natural plant alkaloid, is a muscarinic acetylcholine receptor blocker.

Scopolamine butylbromide ((-)-Scopolamine butylbromide) is a competitive antagonist of mAChR (IC50: 55.3 ± 4.3 nM).

Scopolamine nitrate is a biochemical reagent that can be used as a biomaterial for life science related research and as a sulfonylation reagent for organic synthesis and drug discovery.

Aniracetam (Ro 13-5057)(Ro 13-5057), a nootropic and neuroprotective drug, selectively modulates the AMPA receptor and nAChR.

Norscopolamine (Standard) is a reference standard for research and analysis in studies involving Norscopolamine. Norscopolamine is a natural product

Norscopolamine is a natural product

Apohyoscine (Standard) is a reference standard for research and analysis in studies involving Apohyoscine. Apohyoscine is a natural product of Datura, Solanaceae. The catalog number is TN3434 and the CAS number is 535-26-2. Apohyoscine can be used as a reference standard.

Anisodamine (6-beta-Hydroxyhyoscyamine) is an antagonist of muscarinic and nicotinic cholinoceptor with similar affinities at the muscarinic receptor as scopolamine and atropine. Anisodamine improve the microcirculation in states of shock and can be used in studies about organophosphate poisoning.

SAK3 is a novel modulator of nAChR activity that enhances T-type voltage-gated Ca2+ channel (T-VGCC) activity, and has potentiating effects on both Cav3.1 and Cav3.3 T-type Ca2+ channel currents.SAK3 is neuroprotective against scopolamine-induced cholinergic dysfunction in human neuroblastoma SH-SY5Y cells.SAK3 is used for the study of memory deficits and Alzheimer's disease. SAK3 can be used to study memory deficits and Alzheimer's disease.

RU 47213 can be used to inhibit scopolamine-induced working memory impairment in rats.

Tropine is a secondary metabolite of the Solanaceae family of plants and is an anticholinergic reagent. It is a common intermediate used in the synthesis of various biologically active alkaloids (e.g. hyoscyamine, scopolamine).

Unifiram is a nootropic agent.1It increases acetylcholine (ACh) release in the rat cerebral cortexin vivoand induces a long-lasting increase in the amplitude of field excitatory postsynaptic potentials (fEPSPs) in the rat hippocampal CA1 region (EC50= 27 nM). It does not bind to serotonin (5-HT), dopamine, muscarinic, nicotinic, adrenergic, glutamate, histamine, opioid, or GABA receptors at 1 μM. Unifiram (0.1 mg/kg) improves memory in non-memory-impaired rats in a social learning test.2It also prevents memory deficits induced by the anticholinergic agent scopolamine, nicotinic receptor antagonist mecamylamine, GABABreceptor agonist baclofen, or α2-adrenergic receptor agonist clonidine in the passive avoidance test in mice when administered at a dose of 0.01 mg/kg and prevents memory deficits induced by the AMPA/kainate glutamate receptor antagonist NBQX at 0.1 mg/kg.1 1.Romanelli, M.N., Galeotti, N., Ghelardini, C., et al.Pharmacological characterization of DM232 (unifiram) and DM235 (sunifiram), new potent cognition enhancersCNS Drug Rev.12(1)39-52(2006) 2.Ghelardini, C., Galeotti, N., Gualtieri, F., et al.The novel nootropic compound DM232 (unifiram) ameliorates memory impairment in mice and ratsDrug Develop. Res.56(1)23-32(2002)

Enerisant (TS-091) is an orally active, selective and potent histamine H3 receptor antagonist that modulates histamine H3 receptors in mice in a dose-dependent manner.Enerisant promotes pro-cognitive effects and reverses scopolamine-induced cognitive deficits.

TZ3O is an anticholinergic compound with neuroprotective activity.TZ3O ameliorates memory impairment and cognitive decay in Scopolamine-induced Alzheimer's type model in rats, and can be used in the study of Alzheimer's disease.

Rivanicline hemioxalate, also known as RJR-2403 hemioxalate or (E)-Metanicotine hemioxalate, is a chemical compound acting as a neuronal nicotinic receptor agonist with pronounced selectivity for the α4β2 receptor subtype, showing over 1,000-fold greater selectivity for this subtype (Ki=26 nM) compared to α7 receptors (Ki=3.6 μM). Its in vitro studies demonstrate no significant activation of nAChRs in PC12 cells, muscle type nAChRs, or muscarinic receptors at concentrations up to 1 mM. Furthermore, Rivanicline displayed less than one-tenth the potency of nicotine in inducing ileum contraction, with substantially lower efficacy, and failed to antagonize nicotine-induced stimulation of muscle or ganglionic nAChR functions, with an IC50 value greater than 1 mM. Chronic exposure to Rivanicline at 10 microM led to up-regulation of high-affinity nAChRs in M10 cells, mimicking effects observed with nicotine. In vivo studies revealed that Rivanicline significantly reversed scopolamine-induced amnesia and improved working and reference memory in a rat model, while being 15 to 30 times less potent than nicotine in affecting body temperature, respiration, and other physiological responses. Metanicitone's potency was approximately five times lower than nicotine in tail-flick tests following subcutaneous administration, yet slightly more potent upon central administration.

H3R antagonist 4 (compound 11l) serves as a dual inhibitor of cholinesterases and histamine H3 receptors (H3R), demonstrating IC50 values of 7.04 μM (eeAChE), 9.73 μM (hAChE)(reversible), and 1.09 nM (H3R). It effectively inhibits both self and Cu2+-induced Aβ1-42 aggregation at 95.48% and 88.63%, respectively, and degrades Aβ1-42 protofibrils with 80.16% and 89.30% efficiency under similar conditions. Additionally, H3R antagonist 4 possesses the chelating capability for biometals Cu2+, Zn2+, Al3+, and Fe2+. It significantly reduces tau protein hyperphosphorylation induced by Aβ1-42, inhibits RSL-3 induced apoptosis and ferroptosis in PC12 cells, and shows optimal blood-brain barrier permeability and intestinal absorption characteristics in hCMEC/D3 and hPepT1-MDCK cells, respectively. Moreover, the compound improves learning and memory impairments in an Alzheimer's mouse model induced with scopolamine.

D5R Agonist 1 (Compound 5j) is a selective, orally active partial agonist of the D5 receptor that can penetrate the blood-brain barrier (EC50: 269.7 nM). It has been demonstrated to enhance cognitive abilities in a scopolamine-induced amnesia model.

CL-13 is an inhibitor of butyrylcholinesterase (BChE), exhibiting an IC50 of 1.15 μM and a selectivity index (SI) of 9.2 for acetylcholinesterase. It demonstrates antioxidative activity in SH-SY5Y cells with a DPPHEC50 of 47.01 μM and has the capacity to chelate metals involved in Aβ aggregation and/or oxidative stress, showing no neurotoxicity at concentrations up to 50 μM. CL-13 can also reverse scopolamine-induced cognitive impairments without affecting motor abilities in mice.

AChE/BChE-IN-23 (Compound 6e) is a dual inhibitor of acetylcholinesterase and butyrylcholinesterase, exhibiting IC50 values of 0.91 μM for AChE, 1.19 μM for eqBChE, and 1.01 μM for hBChE. This compound also demonstrates antioxidant properties and inhibits the aggregation of Aβ1-42 and Tau proteins. Moreover, AChE/BChE-IN-23 prevents the activation of microglial cells by inhibiting the release of reactive oxygen species and mitochondrial damage. Additionally, it reduces the levels of the NLRP3 inflammasome in human microglial cells and reverses memory impairment in mice induced by scopolamine.

AChE/BChE-IN-25 (Compound 6e) is an orally active inhibitor of hAChE and eqBChE, with IC50 values of 7.9 nM and 0.79 nM, respectively. This compound exhibits antioxidant activity, effective in scavenging free radicals with an IC50 of 22.91 μM. AChE/BChE-IN-25 demonstrates neuroprotective effects by reducing mitochondrial and cellular oxidative stress in a Drosophila Alzheimer's model and improves spatial and cognitive memory impairments induced by Scopolamine in mouse models.

hAChE-IN-10 (Compound ET11) is an inhibitor of human acetylcholinesterase (AChE) with an IC50 of 6.34 nM. This compound is capable of scavenging free radicals and exhibits antioxidant activity. Additionally, hAChE-IN-10 demonstrates metal-chelating properties, inhibiting Cu2+-induced Aβ1-42 aggregation, reducing amyloid plaque formation, and offering neuroprotective effects. It also ameliorates cognitive impairment in mice induced by Scopolamine.

Ro4368554 is a selective 5-HT6 antagonist capable of crossing the blood-brain barrier. It can reverse memory deficits caused by scopolamine and tryptophan depletion. Ro4368554 is applicable for research related to memory impairments.