BQCA

Competition binding reactions used 25 μg human M1 CHO membrane protein, BQCA or vehicle, and 0.15 nM [³H]NMS in 96-well deep-well plates. Binding reactions (30 °C for 2-3 h) are terminated by rapid filtration. Nonspecific binding is determined by adding 10 μM atropine. Filter plates are ished 4×with ice-cold 20 mM HEPES, 100 mM NaCl, and 5 mM MgCl₂, pH 7.4 using a 96-well harvester. Plates are dried and radioactivity counted with a microplate scintillation counter^[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Rats: Male Sprague-Dawley rats weighing 225-250 g, are injected i.p. with the micro-suspension (containing 10% tween 80) of BQCA at the dose of 10 mg/kg. The blood and whole brain tissue samples are collected at 0.5, 1, 2, 4 and 8 h. Blood samples are collected through cardiac puncture in EDTA vacutainer tubes. The plasma is separated by centrifugation and stored at −80°C until analysis. The animals are decapitated and the whole brain tissue are removed and immediately frozen on dry ice^[2].

Mice: Mice are dosed I.P. with BQCA in 5% beta-cyclodextrin and/or 0.3 mg/kg scopolamine in 0.9% saline 30 min before placement into a chamber for 2 min before 2 tone-footshock pairings (3 kHz, 85 dB tone for 30 s co-terminated with a 0.5 mA, 1 s shock) 2 min apart. Mice are removed to their home cage 30 s after the last pairing. Twenty-four hours later mice are placed into the same chamber and freezing is measured by Video Freeze^[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.