| Assay Method Information | |
| | Radioligand Binding Assay |
| Description: | Radioligand binding assays were conducted using freshly thawed membranes expressing human mu-receptors (Perkin Elmer, Shelton, Conn.). Radioligand dose-displacement binding assays for human mu-opioid receptors used 0.2 nM[3H]-diprenorphine (NEN, Boston, Mass.), with 5-20 mg membrane protein/well in a final volume of 500 uL binding buffer (10 mM MgCl2, 1 mM EDTA, 5% DMSO, 50 mM HEPES, pH 7.4). Reactions were carried out in the absence or presence of increasing concentrations of unlabeled naloxone. All reactions were conducted in 96-deep well polypropylene plates for 1-2 hrs at about 25 C. Binding reactions were terminated by rapid filtration onto 96-well Unifilter GF/C filter plates (Packard, Meriden, Conn.) presoaked in 0.5% polyethylenimine using a 96-well tissue harvester (Brandel, Gaithersburg, Md.) followed by performing three filtration washes with 500 uL of ice-cold binding buffer. Filter plates were subsequently dried at 50 C. for 2-3 hrs. |
| Affinity data for this assay | |
|---|---|
| If you find an error in this entry please send us an E-mail | |