GSK189254A
Based on 2 publication(s) in Google Scholar
GSK189254A (GSK189254 free base) is a novel, potent and selective histamine H3 receptor antagonist with pKi values of 9.59-9.90 and 8.51-9.17 for human and rat H3, respectively.
Nur für Forschungszwecke. Wir verkaufen nicht an Patienten.
- Reinheit: 98.59%
- CAS. Nr.: 720690-73-3
- Formel: C21H25N3O2
- Molecular Weight:351.44
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Speicherung:Powder -20°C, 3 years , 4°C, 2 years ; In solvent -80°C, 2 years , -20°C, 1 year
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Publications Citing Use of MedChemExpress (MCE) GSK189254A
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Biologische Aktivität
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H3 receptor |
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Cell Line
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Type | Value | Description | References |
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| CHO-K1 | IC50 |
0.55 nM
Compound: 27, GSK-189254
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Antagonist activity at human cloned histamine H3 receptor expressed in CHO-K1 cells assessed as inhibition of R-alpha-methylhistamine-induced [35S]GTPgammaS binding
Antagonist activity at human cloned histamine H3 receptor expressed in CHO-K1 cells assessed as inhibition of R-alpha-methylhistamine-induced [35S]GTPgammaS binding
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[PMID: 18841880] |
GSK189254 has high affinity for both recombinant H3 receptors expressed in HEK-293-MSR-II cells and native H3 receptors expressed in the cerebral cortex of several species. GSK189254 generally exhibits higher affinity for human and pig H3 receptors compared with rat,mouse, and dog H3 receptors. [3H]GSK189254 binds in rat and human brain areas, including cortex and hippocampus. GSK189254 may have therapeutic potential for the symptomatic treatment of dementia in Alzheimer’s disease and other cognitive disorders [1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS. Nr. 720690-73-3
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Appearance Solid
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Molecular Weight 351.44
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Formel C21H25N3O2
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Color White to off-white
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SMILES
O=C(NC)C(C=N1)=CC=C1OC2=CC(CC3)=C(C=C2)CCN3C4CCC4
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Synonyms
GSK189254 free base
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Versand
Room temperature in continental US; may vary elsewhere.
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Speicherung
Powder -20°C 3 years 4°C 2 years In solvent -80°C 2 years -20°C 1 year
Publications (2)
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Journal Impact Factor
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Most Recent
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Int J Mol Sci
The Histamine H4 Receptor Participates in the Neuropathic Pain-Relieving Activity of the Histamine H3 Receptor Antagonist GSK189254. [Abstract]2022 Nov 18;23(22):14314. PMID: 36430790 -
J Inflamm Res
Neural-Inflammation Mechanism of Spinal Palmitic Acid Promoting Atopic Dermatitis in Mice. [Abstract]2025 Jun 17:18:7907-7919. PMID: 40546406
Lösungsmittel & Löslichkeit
DMSO : 25 mg/mL (71.14 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.
Konzentration (Stammlösung) × Volumen (Stammlösung) = Konzentration (Ziellösung) × Volumen (Ziellösung)
Select the appropriate dissolution method based on your experimental animal and administration route.
- For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
- To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for In Vivo experiments, it is recommended to prepare freshly and use it on the same day.
- The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.5 mg/mL (7.11 mM); Clear solution
This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: ≥ 2.5 mg/mL (7.11 mM); Clear solution
This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
Please enter the basic information of animal experiments:
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
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%DMSO +
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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%+
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+%Tween-80 + +
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%Saline +
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Working solution concentration: 0.22 mg/mL
Method for preparing stock solution: mg drug dissolved in μL DMSO. Stock solution concentration: mg/mL.
1. Take μL DMSO stock solution;
2. Add μL .
μL , mix evenly;
3. Then add μL Tween 80, mix evenly;
4. Then add μL
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Protokoll
Rats: Pharmacokinetic studies with GSK189254 are conducted in conscious male Sprague-Dawley rats. Animals receives an intravenous infusion of GSK189254 (n=3) administered at a nominal dose level of 1 mg of free base/kg for 1 h via the femoral vein cannula (10 mL/h/kg). GSK189254 is dissolved in 0.9% (w/v) saline at a target concentration of 0.1 mg free base/mL and filtered with a 0.22-mm Millex-GV filter before administration. After a ish out of at least 2 days, the same rats received a single oral administration of GSK189254 by gastric gavage to achieve a target dose of 2 mg of free base/kg. GSK189254 is formulated in 1% (w/v) aqueous methylcellulose at a target concentration of 0.4 mg free base/mL[1].
Mice: The vehicle consists of 0.05 mL NaCl at 0.9% containing methylcellulose at 1%. GSK189254 is dissolved in vehicle solution. The effects of acute and repeat administration of GSK189254 on the sleep-wake cycle in wild-type (Ox+/+) and orexin knockout (Ox−/−) mice is investigated. GSK189254 (3 and 10 mg/kg, p.o.) is administered on the sleep-wake cycle in Ox+/+ and Ox−/− mice, dosed at 10 h. The oral administration dose of GSK189254 is 10 mg/kg[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Reinheit & Dokumentation
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Data Sheet (274 KB)
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SDS (394 KB)
- English - EN (394 KB)
- Français - FR (394 KB)
- Deutsch - DE (394 KB)
- Norwegian - NO (394 KB)
- Español - ES (394 KB)
- Swedish - SV (394 KB)
- Italian - IT (394 KB)
- Korean - KR (394 KB)
- Portuguese - PT (394 KB)
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Handling Instructions (2659 KB)
Verweise
[1]. Medhurst AD, et al. GSK189254, a novel H3 receptor antagonist that binds to histamine H3 receptors in Alzheimer's disease brain and improves cognitive performance in preclinical models. J Pharmacol Exp Ther. 2007 Jun;321(3):1032-45. [Content Brief]
[2]. Guo RX, et al. Differential effects of acute and repeat dosing with the H3 antagonist GSK189254 on the sleep-wake cycle and narcoleptic episodes in Ox-/- mice.Br J Pharmacol. 2009 May;157(1):104-17. [Content Brief]
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
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| DMSO | 1 mM | 2.8454 mL | 14.2272 mL | 28.4544 mL | 71.1359 mL |
| 5 mM | 0.5691 mL | 2.8454 mL | 5.6909 mL | 14.2272 mL | |
| 10 mM | 0.2845 mL | 1.4227 mL | 2.8454 mL | 7.1136 mL | |
| 15 mM | 0.1897 mL | 0.9485 mL | 1.8970 mL | 4.7424 mL | |
| 20 mM | 0.1423 mL | 0.7114 mL | 1.4227 mL | 3.5568 mL | |
| 25 mM | 0.1138 mL | 0.5691 mL | 1.1382 mL | 2.8454 mL | |
| 30 mM | 0.0948 mL | 0.4742 mL | 0.9485 mL | 2.3712 mL | |
| 40 mM | 0.0711 mL | 0.3557 mL | 0.7114 mL | 1.7784 mL | |
| 50 mM | 0.0569 mL | 0.2845 mL | 0.5691 mL | 1.4227 mL | |
| 60 mM | 0.0474 mL | 0.2371 mL | 0.4742 mL | 1.1856 mL |
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