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Tiagabine hydrochloride

GABA uptake inhibitor; anticonvulsant CAS# 145821-59-6

Tiagabine hydrochloride

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Quality Control of Tiagabine hydrochloride

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Chemical structure

Tiagabine hydrochloride

3D structure

Chemical Properties of Tiagabine hydrochloride

Cas No. 145821-59-6 SDF Download SDF
PubChem ID 91274 Appearance Powder
Formula C20H26ClNO2S2 M.Wt 412.01
Type of Compound N/A Storage Desiccate at -20°C
Synonyms NO050328 hydrochloride; NO328 hydrochloride; TGB hydrochloride
Solubility DMSO : ≥ 53 mg/mL (128.64 mM)
*"≥" means soluble, but saturation unknown.
Chemical Name (3R)-1-[4,4-bis(3-methylthiophen-2-yl)but-3-enyl]piperidine-3-carboxylic acid;hydrochloride
SMILES CC1=C(SC=C1)C(=CCCN2CCCC(C2)C(=O)O)C3=C(C=CS3)C.Cl
Standard InChIKey YUKARLAABCGMCN-PKLMIRHRSA-N
Standard InChI InChI=1S/C20H25NO2S2.ClH/c1-14-7-11-24-18(14)17(19-15(2)8-12-25-19)6-4-10-21-9-3-5-16(13-21)20(22)23;/h6-8,11-12,16H,3-5,9-10,13H2,1-2H3,(H,22,23);1H/t16-;/m1./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 Tiagabine hydrochloride

DescriptionGABA uptake inhibitor (IC50 = 67 nM in vivo). Exhibits high affinity and selectivity for the GAT-1 GABA transporter. Anticonvulsant; also attenuates established dynorphin-induced allodynia in a mouse model after systemic administration.

Tiagabine hydrochloride Dilution Calculator

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Tiagabine hydrochloride Molarity Calculator

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Preparing Stock Solutions of Tiagabine hydrochloride

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 2.4271 mL 12.1356 mL 24.2713 mL 48.5425 mL 60.6781 mL
5 mM 0.4854 mL 2.4271 mL 4.8543 mL 9.7085 mL 12.1356 mL
10 mM 0.2427 mL 1.2136 mL 2.4271 mL 4.8543 mL 6.0678 mL
50 mM 0.0485 mL 0.2427 mL 0.4854 mL 0.9709 mL 1.2136 mL
100 mM 0.0243 mL 0.1214 mL 0.2427 mL 0.4854 mL 0.6068 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 Tiagabine hydrochloride

Tiagabine hydrochloride(NO328 hydrochloride) is a selective gamma-aminobutyric acid (GABA) reuptake inhibitor. Target: GABA reuptake inhibitor Tiagabine had an early onset of effect, as shown by significant reduction from baseline in mean HAM-A total score compared with placebo at week 1 (observed cases, p < .05). Tiagabine was generally well tolerated and not associated with changes in sexual functioning or depressive status. Symptoms of a discontinuation syndrome during taper were not observed. Tiagabine may be a useful treatment option for adult patients diagnosed with GAD [1]. Tiagabine was generally well tolerated; the most common adverse events were nausea, dizziness and headaches [2]. Tiagabine (0.1 microM), an antiepileptic drug that specifically inhibits the GAT-1 GABA transporter inhibited GABA uptake 50% in temporal cortex and 60-68% in white structures [3].

References:
[1]. Pollack, M.H., et al., The selective GABA reuptake inhibitor tiagabine for the treatment of generalized anxiety disorder: results of a placebo-controlled study. J Clin Psychiatry, 2005. 66(11): p. 1401-8. [2]. Sheehan, D.V., et al., An open-label study of tiagabine in panic disorder. Psychopharmacol Bull, 2007. 40(3): p. 32-40. [3]. Henjum, S. and B. Hassel, High-affinity GABA uptake and GABA-metabolizing enzymes in pig forebrain white matter: a quantitative study. Neurochem Int, 2007. 50(2): p. 365-70.

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References on Tiagabine hydrochloride

Comparison of antiepileptic drugs tiagabine, lamotrigine, and gabapentin in mouse models of acute, prolonged, and chronic nociception.[Pubmed:12183677]

J Pharmacol Exp Ther. 2002 Sep;302(3):1168-75.

Some antiepileptic drugs have been shown to be clinically effective in the treatment of neuropathic pain. This study determined whether the new antiepileptic drug tiagabine, a GABA uptake inhibitor, is efficacious in mice in a broad range of nociceptive tests (hot-plate, formalin, and dynorphin-induced chronic allodynia) and compared tiagabine's potency with two other antiepileptic drugs, gabapentin and lamotrigine. Intraperitoneally administered tiagabine, but not lamotrigine, gabapentin, or i.t. tiagabine, produced dose-dependent antinoception in the hot-plate test. A 5-min pretreatment with tiagabine (2-29 nmol i.t.) dose-dependently inhibited both the acute and late phase formalin behaviors; pretreatment with lamotrigine (4-265 nmol i.t.) inhibited only the late phase. In the formalin assay the GABA(A) antagonist bicuculline reversed the acute phase antinociception, whereas the GABA(B) antagonist saclofen reversed both the acute and late phase tiagabine-induced antinociception. Tiagabine administered i.p. but not i.t. dose-dependently reduced dynorphin-induced chronic allodynia for 120 min. Gabapentin and lamotrigine produced antinociception administered either i.t. or i.p. in a dose-dependent manner. Thus, we have shown that gabapentin and lamotrigine produced antinociception in two mouse models of pain, whereas tiagabine produced antinociception in all three mouse models of pain.

Design, synthesis and evaluation of substituted triarylnipecotic acid derivatives as GABA uptake inhibitors: identification of a ligand with moderate affinity and selectivity for the cloned human GABA transporter GAT-3.[Pubmed:8057281]

J Med Chem. 1994 Jul 22;37(15):2334-42.

gamma-Aminobutyric acid (GABA) is the major inhibitory neurotransmitter in the mammalian central nervous system. Molecular biology has revealed the presence of four high-affinity GABA transporters in the brain, GAT-1, GAT-2, GAT-3, and BGT-1, the latter transporting both GABA and the osmolyte Betaine. We have shown that known GABA uptake inhibitors such as SK&F 89976-A, CI-966, and Tiagabine exhibit high affinity and selectivity for GAT-1. In the present paper we describe the design and synthesis of a novel series of triarylnipecotic acid derivatives for evaluation as GABA uptake inhibitors. The design lead for this series of compounds was the nonselective GABA uptake inhibitor EGYT-3886, [(-)-2-phenyl-2-[(dimethylamino)ethoxy]-(1R)- 1,7,7-trimethylbicyclo[2.2.1]heptane]. From this series of compounds (S)-1-[2-[tris(4-methoxyphenyl)methoxy]ethyl]-3-piperidinecarboxylic+ ++ (S)-1-[2-[tris(4-methoxyphenyl)methoxy]ethyl]-3-piperidinecarboxylic+ ++ acid, 4(S) was identified as a novel ligand with selectivity for GAT-3. 4(S) displayed an IC50 of 5 microM at GAT-3, 21 microM at GAT-2, > 200 microM at GAT-1, and 140 microM at BGT-1. This compound will be an important tool for evaluating the role of GAT-3 in neural function.

The synthesis of novel GABA uptake inhibitors. 1. Elucidation of the structure-activity studies leading to the choice of (R)-1-[4,4-bis(3-methyl-2-thienyl)-3-butenyl]-3-piperidinecarboxylic acid (tiagabine) as an anticonvulsant drug candidate.[Pubmed:8510100]

J Med Chem. 1993 Jun 11;36(12):1716-25.

A series of different synthetic approaches to novel GABA uptake inhibitors are described, leading to examples which are derivatives of nipecotic acid and guvacine, substituted at nitrogen by 4,4-diaryl-3-butenyl or 2-(diphenylmethoxy)ethyl moieties. The in vitro value for inhibition of [3H]-GABA uptake in rat synaptosomes was determined for each compound. It was found that the most potent examples are those having a substituent in an "ortho" position in one or both aromatic/heteroaromatic groups. The majority of the compounds described are structurally related to tiagabine, (R)-1-[4,4-bis(3-methyl-2-thienyl)-3-butenyl]-3- piperidinecarboxylic acid hydrochloride (NNC 05-0328) and some of the reasoning behind the selection of this compound as a drug candidate is summarized.

Description

Tiagabine hydrochloride is a potent and selective GABA reuptake inhibitor, used as an anticonvulsant agent, with IC50s of 67, 446 and 182 nM for [3H]GABA uptake in Synaptosomes, Neurons and Glia, respectively.

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