SB-649868 (Synonyms: GSK 649868) |
| Katalog-Nr.GC19323 |
SB-649868 ist ein potenter und selektiver oral aktiver Orexin (OX) 1- und OX2-Rezeptorantagonist (pKi = 9,4 bzw. 9,5 am OX1- bzw. OX2-Rezeptor).
Products are for research use only. Not for human use. We do not sell to patients.
Cas No.: 380899-24-1
Sample solution is provided at 25 µL, 10mM.
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SB-649868 is a potent and selective orally active orexin (OX) 1 and OX2 receptor antagonist (pKi =9.4 and 9.5 at the OX1 and OX2 receptor, respectively).
SB-649868 is identified as one the most in vitro potent dual OX1 and OX2 receptor antagonist known at that time (pKi=9.4 and 9.5 at the OX1 and OX2 receptor, respectively) [1]. SB-649868 antagonizes orexin-A-induced inositol 1 phosphate (IP1) accumulation with the following pKB value (OX1=9.67; OX2=9.64). SB-649868 displaces the [3H]ACT-078573 receptor binding with the following pKi values: OX1=9.27; OX2=8.91. Increasing concentrations of SB-649868 (0.3 nM-30 nM) induces a rightward shift of the orexin-A CRCs with a depression of the agonist efficacy suggesting a clear non-surmountable behavior. The calculated apparent pKb values are 9.67±0.03 and 9.64±0.07 for OX1 and OX2[2].
Pharmacokinetic studies in the male CD rat, performed at 1 mg/kg, iv and 3 mg/kg, po, demonstrate an excellent pharmacokinetic profile for a hypnotic agent featuring moderate clearance in plasma (Clp=24 mL/min/kg), short half-life of (<0.6 h) and a low volume of distribution (Vss=1.1 l/kg), coupled with excellent oral bioavailability (F=85%) and good exposure in plasma (Cmax=333 ng/mL). A brain to blood ratio (B/B) of 0.1:1 is observed 1 h after iv administration, a value in line with the expected partition between the two compartments based on the lower tissue binding observed in vitro in brain tissues (fraction unbound/brain=5.28%) with respect to plasma proteins (fraction unbound/plasma=1.34%). SB-649868, administered orally 3 h before OX-A injection at doses of 1, 3 and 10 mg/kg, causes a dose-dependent reduction of OX-A induced grooming as measured by total time spent grooming and number of grooming bouts (p <0.01 at 3 and 10 mg/kg po) [1]. From dissociation kinetic studies using [3H]ACT-078573, the calculated long half-life, (t1/2) supports the non-surmountability profile of SB-649868 (t1/2=35.91 min) at OX1 orexin receptor. The long or moderately long t1/2values for SB-649868 at OX2 orexin receptor (t1/2=8.09 min)[2].
References:
[1]. Di Fabio R, et al. Discovery process and pharmacological characterization of a novel dual orexin 1 and orexin 2receptor antagonist useful for treatment of sleep disorders. Bioorg Med Chem Lett. 2011 Sep 15;21(18):5562-7.
[2]. Faedo S, et al. Functional and binding kinetic studies make a distinction between OX1 and OX2 orexin receptorantagonists. Eur J Pharmacol. 2012 Oct 5;692(1-3):1-9.
Cell experiment: | Chinese Hamster Ovary (CHO) cells stably transfected with human OX1 orexin receptor are cultured in Dulbecco's modified Eagle's medium F12 Ham, supplemented with 10% fetal bovine serum (FBS), 2 mg/mL glutamine, 600 μg/ml geneticin at 37 °C in an atmosphere of 95% air and 5% CO2. CHO cells stably transfected with human OX2 orexin receptor are cultured in alpha-MEM supplemented with 10% FBS, 100 units/mL penicillin G, 100 units/mL streptomycin and 400 μg/mL geneticin, at 37 °C in an atmosphere of 95% air and 5% CO2. Accumulation of IP1 is measured using IP-One HTRF terbium cryptate-based assay. OX1-CHO cells are seeded into white 384-well plate at the cell density of 1×104 cells per well and cultured for 24 h in the presence of 5 mM sodium butyrate while OX2-CHO cells are seeded at the cell density of 4×104 cells per well and cultured for 24 h in culture medium. After washings Hank's Balanced Salt Solution (HBSS) at room temperature containing 20 mM HEPES pH 7.4, 50 mM, LiCl and 0.1% Bovine Serum Albumin (BSA) cells are pre-incubated for 45 min with antagonist and then treated with agonist for 60 min at 37 °C. Detection reagents, IP1-d2 tracer and anti-IP1-cryptate are diluted in lysis buffer and added to the cells. Following 60 min incubation at room temperature, time-resolved fluorescence at 615 nm and 665 nm are measured with Envision Multilabel flash lamp reader with 100 flashes and 400 μs integration time[2]. |
References: [1]. Di Fabio R, et al. Discovery process and pharmacological characterization of a novel dual orexin 1 and orexin 2receptor antagonist useful for treatment of sleep disorders. Bioorg Med Chem Lett. 2011 Sep 15;21(18):5562-7. | |
| Cas No. | 380899-24-1 | SDF | |
| Überlieferungen | GSK 649868 | ||
| Canonical SMILES | O=C(C1=C(C2=CC=C(F)C=C2)SC(C)=N1)N3CCCC[C@H]3CNC(C4=C(C=CO5)C5=CC=C4)=O | ||
| Formula | C26H24FN3O3S | M.Wt | 477.55 |
| Löslichkeit | DMF: 15mg/mL,DMF:PBS (pH 7.2) (1:20): 0.04mg/mL,DMSO: 10mg/mL,Ethanol: 0.3mg/mL | Storage | Store at -20°C |
| General tips | Please select the appropriate solvent to prepare the stock solution according to the
solubility of the product in different solvents; once the solution is prepared, please store it in
separate packages to avoid product failure caused by repeated freezing and thawing.Storage method
and period of the stock solution: When stored at -80°C, please use it within 6 months; when stored
at -20°C, please use it within 1 month. To increase solubility, heat the tube to 37°C and then oscillate in an ultrasonic bath for some time. |
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| Shipping Condition | Evaluation sample solution: shipped with blue ice. All other sizes available: with RT, or with Blue Ice upon request. | ||
| Prepare stock solution | |||
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1 mg | 5 mg | 10 mg |
| 1 mM | 2.094 mL | 10.4701 mL | 20.9402 mL |
| 5 mM | 0.4188 mL | 2.094 mL | 4.188 mL |
| 10 mM | 0.2094 mL | 1.047 mL | 2.094 mL |
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- Purity: >98.00%
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