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Rivastigmine Tartrate

Dual AChE and BChE inhibitor CAS# 129101-54-8

Rivastigmine Tartrate

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Rivastigmine Tartrate

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Chemical Properties of Rivastigmine Tartrate

Cas No. 129101-54-8 SDF Download SDF
PubChem ID 77990 Appearance Powder
Formula C18H28N2O8 M.Wt 400.42
Type of Compound N/A Storage Desiccate at -20°C
Synonyms ENA 713
Solubility H2O : 50 mg/mL (124.87 mM; Need ultrasonic)
Chemical Name (2S,3S)-2,3-dihydroxybutanedioic acid;[3-[(1S)-1-(dimethylamino)ethyl]phenyl] N-ethyl-N-methylcarbamate
SMILES CCN(C)C(=O)OC1=CC=CC(=C1)C(C)N(C)C.C(C(C(=O)O)O)(C(=O)O)O
Standard InChIKey GWHQHAUAXRMMOT-RWALOXMOSA-N
Standard InChI InChI=1S/C14H22N2O2.C4H6O6/c1-6-16(5)14(17)18-13-9-7-8-12(10-13)11(2)15(3)4;5-1(3(7)8)2(6)4(9)10/h7-11H,6H2,1-5H3;1-2,5-6H,(H,7,8)(H,9,10)/t11-;1-,2-/m00/s1
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of Rivastigmine Tartrate

DescriptionDual cholinesterase inhibitor (ChEI); inhibits both butyrylcholinesterase (BChE) and acetylcholinesterase (AChE). Brain penetrant.

Rivastigmine Tartrate Dilution Calculator

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Preparing Stock Solutions of Rivastigmine Tartrate

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 2.4974 mL 12.4869 mL 24.9738 mL 49.9476 mL 62.4344 mL
5 mM 0.4995 mL 2.4974 mL 4.9948 mL 9.9895 mL 12.4869 mL
10 mM 0.2497 mL 1.2487 mL 2.4974 mL 4.9948 mL 6.2434 mL
50 mM 0.0499 mL 0.2497 mL 0.4995 mL 0.999 mL 1.2487 mL
100 mM 0.025 mL 0.1249 mL 0.2497 mL 0.4995 mL 0.6243 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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Background on Rivastigmine Tartrate

Rivastigmine is a parasympathomimetic or cholinergic agent for the treatment of mild to moderate dementia of the Alzheimer's type and dementia due to Parkinson's disease.

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References on Rivastigmine Tartrate

Mesoporous silica nanoparticles for efficient rivastigmine hydrogen tartrate delivery into SY5Y cells.[Pubmed:28043167]

Drug Dev Ind Pharm. 2017 Apr;43(4):628-636.

Rivastigmine hydrogen tartrate (RT) is a molecule with both hydrophilic and hydrophobic properties used for the treatment of the Alzheimer's disease. In this work, the larger pore size of mesoporous silica nanoparticles (P1-MSN) was synthesized and then, P1-MSN were functionalized by succinic anhydride (S-P1-MSN) and 3-aminopropyltriethoxysilane (APTES) (AP-CO-P1-MSN) using the grafting and co-condensation methods, respectively. A new method was used for the functionalization of P1-MSN by succinic anhydride at room temperature. Nanoparticles were characterized by special instrumental analysis and loaded by RT. Maximum entrapment efficiency and RT loading percentage into P1-MSN, AP-CO-P1-MSN and S-P1-MSN were respectively obtained as 21.26 and 25.5%, 41.5 and 49.8%, and 11.9 and 14.28% for 24 h. In the simulated gastric and body fluids, the release rate of RT-loaded AP-CO-P1-MSN (AP-CO-P1-MSN-RT) was lower than that of other RT-loaded nanoparticles. In oral pathway, the sustained release of RT was observed in AP-CO-P1-MSN-RT. Moreover, no cytotoxicity effect was observed for P1-MSN, but the cells treated by AP-CO-P1-MSN showed a reduction in SY5Y cell viability due to easy entrance of these nanoparticles and their accumulation in different parts of the cell as observed by TEM.

Development of a novel dry powder inhalation formulation for the delivery of rivastigmine hydrogen tartrate.[Pubmed:26836711]

Int J Pharm. 2016 Mar 30;501(1-2):124-38.

The purpose of this study was to prepare engineered particles of rivastigmine hydrogen tartrate (RHT) and to characterize the physicochemical and aerodynamic properties, in comparison to a lactose carrier formulation (LCF). Microparticles were prepared from ethanol/water solutions containing RHT with and without the incorporation of L-leucine (Leu), using a spray dryer. Dry powder inhaler formulations prepared were characterized by scanning electron microscopy, powder X-ray diffraction, laser diffraction particle sizing, ATR-FTIR, differential scanning calorimetry, bulk and tapped density, dynamic vapour sorption and in vitro aerosol deposition behaviour using a next generation impactor. The smooth-surfaced spherical morphology of the spray dried microparticles was altered by adding Leu, resulting in particles becoming increasingly wrinkled with increasing Leu. Powders presented low densities. The glass transition temperature was sufficiently high (>90 degrees C) to suggest good stability at room temperature. As Leu content increased, spray dried powders presented lower residual solvent content, lower particle size, higher fine particle fraction (FPF<5 mum), and lower mass median aerodynamic diameter (MMAD). The LCF showed a lower FPF and higher MMAD, relative to the spray dried formulations containing more than 10% Leu. Spray dried RHT powders presented better aerodynamic properties, constituting a potential drug delivery system for oral inhalation.

Efficacy of rivastigmine tartrate, transdermal system, in Alzheimer's disease.[Pubmed:26918774]

Expert Opin Pharmacother. 2016;17(6):861-70.

INTRODUCTION: As the most common major neurocognitive disorder, Alzheimer's disease (AD) will play an increasingly important role both socially and financially as the population ages. Approved treatments for AD are symptomatic in nature and show modest improvements in cognition and global functioning among patients with AD. AREAS COVERED: This article focuses on the pharmacokinetics, pharmacodynamics, efficacy, and safety of the transdermal patch form of the cholinesterase inhibitor rivastigmine. The rivastigmine transdermal system is approved for the treatment of patients with mild, moderate, and severe AD. Three randomized trials have shown the rivastigmine patch to be efficacious and tolerable across all stages of AD. EXPERT OPINION: The rivastigmine patch offers several advantages over the capsule form, including decreased peak to trough plasma fluctuations, reduced rates of nausea and vomiting, better treatment adherence, higher probability of reaching the target dose, ease of administration, and greater satisfaction among caregivers. These factors may be especially important in patients with severe AD, in which patients are more vulnerable to adverse side effects from higher doses. While the patch is more expensive than generic therapies, patient populations that may benefit from the patch include those that are particularly sensitive to GI side effects, have chronic gastrointestinal problems, have difficulty swallowing medications, or have failed to respond with high doses of other generic options.

New acetylcholinesterase inhibitors for Alzheimer's disease.[Pubmed:22216416]

Int J Alzheimers Dis. 2012;2012:728983.

Acetylcholinesterase (AChE) remains a highly viable target for the symptomatic improvement in Alzheimer's disease (AD) because cholinergic deficit is a consistent and early finding in AD. The treatment approach of inhibiting peripheral AchE for myasthenia gravis had effectively proven that AchE inhibition was a reachable therapeutic target. Subsequently tacrine, donepezil, rivastigmine, and galantamine were developed and approved for the symptomatic treatment of AD. Since then, multiple cholinesterase inhibitors (ChEI) continue to be developed. These include newer ChEIs, naturally derived ChEIs, hybrids, and synthetic analogues. In this paper, we summarize the different types of ChEIs in development and their respective mechanisms of actions. This pharmacological approach continues to be active with many promising compounds.

Rivastigmine lowers Abeta and increases sAPPalpha levels, which parallel elevated synaptic markers and metabolic activity in degenerating primary rat neurons.[Pubmed:21799757]

PLoS One. 2011;6(7):e21954.

Overproduction of amyloid-beta (Abeta) protein in the brain has been hypothesized as the primary toxic insult that, via numerous mechanisms, produces cognitive deficits in Alzheimer's disease (AD). Cholinesterase inhibition is a primary strategy for treatment of AD, and specific compounds of this class have previously been demonstrated to influence Abeta precursor protein (APP) processing and Abeta production. However, little information is available on the effects of rivastigmine, a dual acetylcholinesterase and butyrylcholinesterase inhibitor, on APP processing. As this drug is currently used to treat AD, characterization of its various activities is important to optimize its clinical utility. We have previously shown that rivastigmine can preserve or enhance neuronal and synaptic terminal markers in degenerating primary embryonic cerebrocortical cultures. Given previous reports on the effects of APP and Abeta on synapses, regulation of APP processing represents a plausible mechanism for the synaptic effects of rivastigmine. To test this hypothesis, we treated degenerating primary cultures with rivastigmine and measured secreted APP (sAPP) and Abeta. Rivastigmine treatment increased metabolic activity in these cultured cells, and elevated APP secretion. Analysis of the two major forms of APP secreted by these cultures, attributed to neurons or glia based on molecular weight showed that rivastigmine treatment significantly increased neuronal relative to glial secreted APP. Furthermore, rivastigmine treatment increased alpha-secretase cleaved sAPPalpha and decreased Abeta secretion, suggesting a therapeutic mechanism wherein rivastigmine alters the relative activities of the secretase pathways. Assessment of sAPP levels in rodent CSF following once daily rivastigmine administration for 21 days confirmed that elevated levels of APP in cell culture translated in vivo. Taken together, rivastigmine treatment enhances neuronal sAPP and shifts APP processing toward the alpha-secretase pathway in degenerating neuronal cultures, which mirrors the trend of synaptic proteins, and metabolic activity.

The kinetics of inhibition of human acetylcholinesterase and butyrylcholinesterase by two series of novel carbamates.[Pubmed:17347320]

Mol Pharmacol. 2007 Jun;71(6):1610-7.

Controlled inhibition of brain acetyl- and butyrylcholinesterases (AChE and BChE, respectively) and of monoamine oxidase-B (MAO-B) may slow neurodegeneration in Alzheimer's and Parkinson's diseases. It was postulated that certain carbamate esters would inhibit AChE and BChE with the concomitant release in the brain of the OH-derivatives of rasagiline or selegiline that can serve as inhibitors of MAO-B and as antioxidants. We conducted a detailed in vitro kinetic study on two series of novel N-methyl, N-alkyl carbamates and compared them with rivastigmine, a known anti-Alzheimer drug. The rates of carbamylation (k(i)) and decarbamylation (k(r)) of recombinant human AChE were mainly determined by the size of the N-alkyl substituent and to a lesser extent by the nature of the leaving group. k(i) was highest when the alkyl was methyl, hexyl, cyclohexyl, or an aromatic substituent and lowest when it was ethyl. This suggested that k(i) depends on a delicate balance between the length of the residue and its degree of freedom of rotation. By contrast, presumably because of its wider gorge, inhibition of human BChE was less influenced by the size of the alkyl group and more dependent on the structure of the leaving group. The data show how the degree of enzyme inhibition can be manipulated by structural changes in the N-methyl, N-alkyl carbamates and the corresponding leaving group to achieve therapeutic levels of brain AChE, BChE, and MAO-B inhibition.

Inhibition of human acetyl- and butyrylcholinesterase by novel carbamates of (-)- and (+)-tetrahydrofurobenzofuran and methanobenzodioxepine.[Pubmed:16570913]

J Med Chem. 2006 Apr 6;49(7):2174-85.

A new enantiomeric synthesis utilizing classical resolution provided two novel series of optically active inhibitors of cholinesterase: (-)- and (+)-O-carbamoyl phenols of tetrahydrofurobenzofuran and methanobenzodioxepine. An additional two series of (-)- and (+)-O-carbamoyl phenols of pyrroloindole and furoindole were obtained by known procedures, and their anticholinesterase actions were similarly quantified against freshly prepared human acetyl- (AChE) and butyrylcholinesterase (BChE). Both enantiomeric forms of each series demonstrated potent cholinesterase inhibitory activity (with IC(50) values as low as 10 nM for AChE and 3 nM for BChE), with the exception of the (+)-O-carbamoyl phenols of pyrroloindole, which lacked activity (IC(50) values >1 microM). Based on the biological data of these four series, a structure-activity relationship (SAR) analysis was provided by molecular volume calculations. In addition, a probable transition-state model was established according to the known X-ray structure of a transition-state complex of Torpedo californica AChE-m-(N,N,N-trimethylammonio)-2,2,2-trifluoroacetophenone (TcAChE-TMTFA). This model proved valuable in explaining the enantioselectivity and enzyme subtype selectivity of each series. These carbamates are more potent than, or similarly potent to, anticholinesterases in current clinical use, providing not only inhibitors of potential clinical relevance but also pharmacological tools to define drug-enzyme binding interactions within an enzyme crucial in the maintenance of cognition and numerous systemic physiological functions in health, aging, and disease.

Description

Rivastigmine tartrate, an cholinesterase inhibitor(IC50= 5.5 uM), inhibits both butyrylcholinesterase and acetylcholinesterase IC50 value: 5.5 uM Target: AChE Rivastigmine is a parasympathomimetic or cholinergic agent for the treatment of mild to moderate dementia of the Alzheimer's type and dementia due to Parkinson's disease.

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