product name SB 271046 HCl
Description: SB271046 is a potent, selective and orally active 5-HT6 receptor antagonist with pKi of 8.9, exhibits 200-fold greater selectivity over other 5-HT receptor subtypes. SB-271046 substituted [125I]-SB-258585 and [3H]-LSD from human 5-HT6 receptors which recombinantly expressed in HeLa cells in vitro (pKi 8.92 and 9.09 respectively). By 5-HT alone or after increasing concentrations of SB-271046 (10, 30, 100 and 300 nM) stimulates adenylyl cyclase activity in HeLa cells stably expressing human 5-HT6 receptors.
References: Br J Pharmacol. 2000 Aug;130(7):1606-12; J Med Chem. 1999 Jan 28;42(2):202-5.
488.45
Formula
C20H22ClN3O3S2·HCl
CAS No.
209481-24-3
Storage
-20℃ for 3 years in powder form
-80℃ for 2 years in solvent
Solubility (In vitro)
DMSO: 40 mg/mL (81.9 mM)
Water: <1 mg/mL
Ethanol: <1 mg/mL
Solubility (In vivo)
1% methylcellulose: ~30 mg/mL
Synonyms
other peoduct :
| In Vitro |
In vitro activity: SB-271046 also potently displaces [125I]-SB-258585 from rat and pig striatal and human caudate putamen membranes with pKis of 9.02, 8.55 and 8.81, respectively. SB-271046 competitively antagonizes 5-HT-induced stimulation of adenylyl cyclase activity with a pA2 of 8.71. SB-271046 is found to be a competitive antagonist with a pA2 of 8.7 in the functional adenylyl cyclase assay which is in good agreement with its binding affinity. SB-271046 demonstrates no significant inhibitory activity at the major human P450 enzymes. Kinase Assay: Cell Assay: |
|---|---|
| In Vivo | SB-271046 produces an increase in seizure threshold over a wide-dose range in the rat maximal electroshock seizure threshold (MEST) test, with a minimum effective dose of 0.1 mg/kg p.o. and maximum effect at 4 hours post-dose. The level of anticonvulsant activity achieves correlated well with the blood concentrations of SB-271046 (EC50 of 0.16 μM) and brain concentrations of 0.01 μM–0.04 μM at Cmax. SB-271046 is moderately brain penetrant (10%), subject to low blood clearance (7.7 mL/min/kg) with a good half-life in rats (4.8 hours), and has excellent oral bioavailability (>80%). SB-271046 produces 3-fold and 2-fold increases in extracellular glutamate levels in both frontal cortex and dorsal hippocampus of rats, respectively, which may be used for the treatment of cognitive and memory dysfunction. SB-271046 (20 mg/kg, orally gavage) 30 min prior to training Wistar rats, is found to reverse significantly the amnesia produced by administering scopolamine (0.8 mg/kg, i.p.) in the 6 hours post-training period. SB-271046 progressively and significantly decreases platform swim angle and escape latencies over the five sequential trials on four consecutive daily sessions compared to vehicle-treated controls in aged rats. SB-271046 also improves task recall as measured by significant increases in the searching of the target quadrant on post-training days 1 and 3. SB-271046 (10 mg/kg, s.c.) produces a significant, tetrodotoxin-dependent, increase in extracellular levels of both glutamate and aspartate within the frontal cortex of rats, reaching maximum values of 375.4% and 215.3% of preinjection values, respectively. |
| Animal model | Male Sprague Dawley rats |
| Formulation & Dosage | Dissolved in 1% methyl cellulose in water; 30 mg/kg; Oral gavage |
| References | Br J Pharmacol. 2000 Aug;130(7):1606-12; J Med Chem. 1999 Jan 28;42(2):202-5. |
