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SIB 1553A hydrochloride

Subunit selective nAChR agonist CAS# 191611-89-9

SIB 1553A hydrochloride

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Chemical structure

SIB 1553A hydrochloride

3D structure

Chemical Properties of SIB 1553A hydrochloride

Cas No. 191611-89-9 SDF Download SDF
PubChem ID 9881989 Appearance Powder
Formula C13H20ClNOS M.Wt 273.82
Type of Compound N/A Storage Desiccate at -20°C
Solubility Soluble to 100 mM in water
Chemical Name 4-[2-(1-methylpyrrolidin-2-yl)ethylsulfanyl]phenol;hydrochloride
SMILES CN1CCCC1CCSC2=CC=C(C=C2)O.Cl
Standard InChIKey RJSVKPQKXSMZMT-UHFFFAOYSA-N
Standard InChI InChI=1S/C13H19NOS.ClH/c1-14-9-2-3-11(14)8-10-16-13-6-4-12(15)5-7-13;/h4-7,11,15H,2-3,8-10H2,1H3;1H
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 SIB 1553A hydrochloride

DescriptionNicotinic acetylcholine receptor (nAChR) agonist. Displays selectivity for β4 subunit-containing receptors. Stimulates acetylcholine levels and other neurotransmitters relevant for cognitive processes. Improves attention deficits and memory performance in a Parkinson's disease model.

SIB 1553A hydrochloride Dilution Calculator

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Preparing Stock Solutions of SIB 1553A hydrochloride

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 3.652 mL 18.2602 mL 36.5203 mL 73.0407 mL 91.3009 mL
5 mM 0.7304 mL 3.652 mL 7.3041 mL 14.6081 mL 18.2602 mL
10 mM 0.3652 mL 1.826 mL 3.652 mL 7.3041 mL 9.1301 mL
50 mM 0.073 mL 0.3652 mL 0.7304 mL 1.4608 mL 1.826 mL
100 mM 0.0365 mL 0.1826 mL 0.3652 mL 0.7304 mL 0.913 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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References on SIB 1553A hydrochloride

In vivo pharmacological characterization of (+/-)-4-[2-(1-methyl-2-pyrrolidinyl)ethyl]thiophenol hydrochloride (SIB-1553A), a novel cholinergic ligand: microdialysis studies.[Pubmed:12965231]

Brain Res. 2003 Oct 3;986(1-2):71-81.

SIB-1553A ((+/-)-4-[2-(1-methyl-2-pyrrolidinyl)ethyl]thiophenol HCl) is a neuronal nicotinic acetylcholine receptor (nAChR) ligand which is active in rodent and primate models of cognition. In functional assays, SIB-1553A exhibits marked subtype selectivity for nAChRs as compared to nicotine. In addition SIB-1553A also exhibits affinities to histaminergic (H3) and serotonergic (5-HT1 and 5HT2) receptors and sigma binding sites. In the present investigation, we characterized SIB-1553A-induced neurotransmitter release in vivo. Following subcutaneous injection (s.c., 10 mg/kg), SIB-1553A rapidly entered the brain achieving concentration of approximately 20 microM 15 min post-injection and was eliminated from plasma with a terminal half-life of approximately 32 min. In freely moving rats, SIB-1553A (1-40 mg/kg, s.c.), markedly increased ACh release in the hippocampus and prefrontal cortex. In both regions, the magnitude of SIB-1553A-induced ACh release was greater than that seen with the prototypical nAChR agonist, nicotine (0.4 mg/kg, s.c.). Both isomers of SIB-1553A induced similar levels of increase in hippocampal ACh release. Increased hippocampal ACh release was also observed following oral administration of SIB-1553A (40 mg/kg) or after local perfusion into the hippocampus (1 mM). SIB-1553A-induced hippocampal ACh release was significantly attenuated by two nAChR antagonists, mecamylamine (MEC) and dihydro-beta-erythroidine (DHbetaE), and by the dopamine (DA) (D1) antagonist, SCH-23390, arguing that ACh release, in part, involves activation of nAChRs and a permissive DA synapse. In contrast to its robust effects on ACh release, SIB-1553A (40 mg/kg, s.c.) modestly increased striatal DA release (approximately 180% of baseline). Due to the proposed role of cholinergic pathways in learning and memory, the neurochemical profile of SIB-1553A suggests a potential for it to treat cognitive dysfunction.

SIB-1553A, (+/-)-4-[[2-(1-methyl-2-pyrrolidinyl)ethyl]thio]phenol hydrochloride, a subtype-selective ligand for nicotinic acetylcholine receptors with putative cognitive-enhancing properties: effects on working and reference memory performances in aged rodents and nonhuman primates.[Pubmed:11561092]

J Pharmacol Exp Ther. 2001 Oct;299(1):297-306.

Preclinical and clinical data have suggested the potential use of nicotinic acetylcholine receptor (nAChR) ligands for treating cognitive dysfunction associated with neurodegenerative diseases, such as Alzheimer's disease. SIB-1553A, (+/-)-4-[[2-(1-methyl-2-pyrrolidinyl)ethyl]thio]phenol hydrochloride, a novel nAChR ligand with predominant agonist subtype selectivity for beta4 subunit-containing human neuronal nAChRs, was tested in a variety of cognitive paradigms in aged rodents and nonhuman primates after acute and repeated administration. Subcutaneous administration of SIB-1553A improved delayed nonmatching to place performance in aged mice. In aged rhesus monkeys, intramuscular and oral administration of SIB-1553A improved choice accuracy in a delayed matching to sample task. SIB-1553A improved performances in these spatial and nonspatial working memory tasks but was less effective at improving performances in spatial reference memory tasks (i.e., aged rodents exposed to a discrimination task in a T-maze or trained to locate a hidden platform in a water maze). These data suggest that SIB-1553A has a predominant effect on attention/working memory processes. SIB-1553A also induced the release of acetylcholine in the hippocampus of aged rats and was equally effective whether administered acutely or repeatedly (6 weeks of daily subcutaneous administration). Thus, rats repeatedly treated with SIB-1553A exhibit neither tolerance nor sensitization to the effects of the compound. The SIB-1553A-induced cognitive improvement may be in part related to an increase in cholinergic function. The present study provides additional support for the use of subtype-selective nAChR ligands as a potential therapy for the symptomatic treatment of specific cognitive deficits (such as attention/working memory deficits) associated with aging and neurological diseases.

Effects of (+/-)-4-[[2-(1-methyl-2-pyrrolidinyl)ethyl]thio]phenol hydrochloride (SIB-1553A), a selective ligand for nicotinic acetylcholine receptors, in tests of visual attention and distractibility in rats and monkeys.[Pubmed:11907185]

J Pharmacol Exp Ther. 2002 Apr;301(1):284-92.

Nicotine, a nonselective ligand for nicotinic acetylcholine receptors (nAChRs), has been shown to improve attention and reduce distractibility in humans. Although the numerous side effects induced by nicotine prevent its use as a therapeutic agent, it is hypothesized that subtype-selective nAChR ligands may offer a potential therapeutic benefit to humans with attention deficits. In this study, we evaluated the attention-enhancing properties of (+/-)-4-[[2-(1-methyl-2-pyrrolidinyl)ethyl]thio]phenol hydrochloride (SIB-1553A), a ligand selective for neuronal nAChRs with predominant activity at the human beta 4 subtype. SIB-1553A was evaluated in a test of attention (i.e., five-choice serial reaction time task or SRTT) and distractibility (i.e., delayed matching to sample task with distractor or DMTS-D) in adult rats and monkeys, respectively. SIB-1553A did not improve SRTT performance in normal rats, but reversed deficits induced by the N-methyl-D-aspartate (NMDA) antagonist dizocilpine. In the DMTS-D, SIB-1553A improved accuracy across several doses at the short delay intervals, which were affected most by distracting stimuli in adult monkeys. Subsequent testing with optimal doses for each monkey was also associated with significant improvements in DMTS-D accuracy at short delays, indicating the reproducibility of the drug effect. In both species, SIB-1553A had no significant effects on latencies for sample or choice selection and was not associated with adverse effects at efficacious doses. Although it remains to be further demonstrated, SIB-1553A may act through combined nicotinic and non-nicotinic mechanisms. Collectively, the present data suggest that in specific conditions SIB-1553A may improve certain aspects of attentional function in young adult rats and nonhuman primates without adverse side effects.

In vitro pharmacological characterization of (+/-)-4-[2-(1-methyl-2-pyrrolidinyl)ethyl]thio]phenol hydrochloride (SIB-1553A), a nicotinic acetylcholine receptor ligand.[Pubmed:12885429]

Brain Res. 2003 Aug 15;981(1-2):85-98.

SIB-1553A ((+/-)-4-[2-(1-methyl-2-pyrrolidinyl)ethyl]thio]phenol HCl) is a neuronal nicotinic acetylcholine receptor (nAChR) ligand which displaced the binding of [3H]nicotine (NIC) to the rat brain nAChRs with an IC(50) value of 110 nM with no appreciable affinity to the alpha7 nAhRs. SIB-1553A showed modest affinity for histaminergic (H3) and serotonergic (5-HT1 and 5-HT2) receptors, and sigma binding sites. In calcium flux assays, SIB-1553A (0.1-5 microM), in contrast to nicotine, showed a greater selectivity for beta4-subunit containing recombinant hnAChRs (alpha2beta4, alpha3beta4 and alpha4beta4) vs. beta2-subunit containing nAChRs (alpha4beta2 and alpha3beta2) both in terms of efficacy and potency. While NIC (10-30 microM) and epibatidine (0.01-0.1 microM) fully activated human muscle-type AChRs expressed by RD cell line, SIB-1553A was virtually ineffective for up to >100 microM and elicited less than 10% of the response due to suberyldicholine. SIB-1553A (< or =30 microM) evoked [3H]DA release from striatum, olfactory tubercles and prefrontal cortex (PFC), and [3H]NE release from hippocampus and PFC, and this evoked release was sensitive to mecamylamine (MEC). SIB-1553A-evoked neurotransmitter release exhibited region- and transmitter-specific antagonism by dehydro-beta-erythroidine (DHbetaE). SIB-1553A was less efficacious than NIC at evoking [3H]NE from the rat hippocampus and antagonized NIC response upon co-application implying partial agonist properties. SIB-1553A did not evoke basal [3H]ACh release from the rat striatum or hippocampus, but attenuated NMDA-evoked [3H]ACh release from the rat striatum. SIB-1553A did not inhibit rat brain cholinesterase for up to 1 mM. Multiple receptor affinities and release of several neurotransmitters may underlie the cognitive-enhancing effects of SIB-1553A documented in rodent and primate models.

The subtype-selective nicotinic acetylcholine receptor agonist SIB-1553A improves both attention and memory components of a spatial working memory task in chronic low dose 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-treated monkeys.[Pubmed:12721323]

J Pharmacol Exp Ther. 2003 Jul;306(1):401-6.

Monkeys that receive chronic low dose (CLD) 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) administration develop deficits in spatial delayed-response task performance. The present study examined the extent to which SIB-1553A [(+/-)-4-[[2-(1-methyl-2-pyrrolidinyl)ethyl]thio]phenol hydrochloride], a novel neuronal nicotinic acetylcholine receptor (nAChR) agonist with selectivity for beta4 subunit-containing nAChRs, could counteract this cognitive deficit produced by CLD MPTP exposure. Prior to MPTP treatment, monkeys displayed a delay-dependent decrement in performance on a variable delayed response task. CLD MPTP treatment caused a shift to a delay-independent pattern of responding on this task, such that short-delay trials were performed as poorly as long-delay trials. At lower doses (e.g., 0.025 mg/kg), SIB-1553A significantly improved performance on short-delay trials but only at 24 h after drug administration. At higher doses (e.g., 0.50 mg/kg), SIB-1553A significantly improved performance on both short- and long-delay trials at both 20 min and 24 h after drug administration. When tested 24 h after drug administration, monkeys performed long-delay trials with greater accuracy than they did under normal (pre-MPTP) conditions. These results suggest that at lower doses, SIB-1553A may be more effective in improving attentional deficits associated with CLD MPTP exposure, whereas at higher doses, SIB-1553A may effectively improve both attentional and memory performance.

Description

SIB-1553A is an orally bioavailable nicotinic acetylcholine receptors (nAChRs) agonist, with selectivity for β4 subunit-containing nAChRs. SIB-1553A is also a selective neuronal nAChR ligand. SIB-1553A is a cognitive enhancer, and has therapeutic potential for the symptomatic treatment of Alzheimer’s disease and other cognitive disorders.

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