Human Melanin Concentrating Hormone Receptor 2 Stable Cell Line Technical Manual No. TM0295 I II III V I. Version 06042010 Introduction ….……………………………………………………………………………. Background………..………………………………………………………………………. Representative Data….…………………………………………………………………… References ………………………………………………………………………………. Limited Use License Agreement ………………………………………………………… 1 1 2 3 4 Introduction Catalog Number: M00127 Cell Line Name: MCHR2 Description: The MCHR2 reporter cell line is created by transfection of pcDNA3.1/MCHR2 in HEK293 cell lines. The transfected cells are stably selected by 150 µg/ml G418. Single-cell clones with high MCHR2 inducibility are isolated using ring cloning and serial dilution. The clones with the largest dynamic ranges in calcium influx activity are chosen for pharmacological and stability studies. II. Applications: Functional assay for MCH receptor 2 Quantity: 2 vial (2 x 106) frozen cells Host Cell: HEK293 Cell Phenotype: Adherent/epithelial Mycoplasma: Negative Storage: Liquid nitrogen immediately upon delivery Culture Medium: DMEM, 10% FBS, 700 µg/ml G418. Background: Melanin-concentrating hormone receptor 2 (MCHR2) is one member of the neuropeptide receptor group. MCHR2 is expressed in the frontal lobe, temporal lobe, occipital lobe, precentral gyrus, pons, hippocampus, amygdala, putamen, and caudate nucleus, with relatively high levels in the cerebral cortex. Because MCHR2 is specially expressed in humans, its functional has not yet been identified. The proposed roles for MCH-R2 are mediation of the cognitive and emotional representation of food intake and involvement in the regulation of nutritional homeostasis by MCH. This manual describes establishment of a cell line and a protocol of pharmacologically validated human MCHR2 GPCR receptor (Genebank Accession Number: NM_032503) -1- III. Representative Data MCH Dose Response of HEK293/MCHR2 Cell Line Area under the ground 1000000.0 750000.0 500000.0 EC50=3.23 nm 250000.0 -8 -7 -6 -5 -4 -3 Log[MCH] mM 1. 12-24 hours before running the assay, seed cells at a density of 3×104 to 5×104 cells/well in a 96-well black plate. 2. The day of the assay, cells should be 100% confluent. Remove cell plates from the incubator. Do not remove the supernatant. Add an equal volume of Fluo3 Loading Buffer to each well (100 µL per well for 96-well plates, 25 µL per well for 384 well plates) 3. Incubate the plate at 37°C in the dark for one hour. 4. Prepare agonist addition plates in advance of assay. To a 96-well plate, add 10x working concentration of agonist compound in Calcium Assay 25 µl solution A, and add 25 µl/well to cell plate. 5. Read with FlexStation using the specified settings and save data. The assay should be completed within three to five minutes after addition, but we recommend collecting data for a minimum of six minutes during assay development. Usually 90 seconds are enough. Instrument Optical Parameters IV. Excitation wavelength (nm) 485 Emission wavelength (nm) 525 Emission cut-off (nm) 515 References -2- 1. 2. 3. 4. Songzhu An et al. Identification and characterization of a melanin concentrating hormone receptor. PNAS, 2001, 98:7576-81. Jeffrey Hill et al. Molecular Cloning and Functional Characterization of MCH2, a Novel Human MCH Receptor. JBC, 2001, 276:20125-129. Wang S. Identification and pharmacological characterization of a novel human melanin-concentrating hormone receptor, MCH-R2. J Biol Chem, 17:17 (2001). Rodriguez M. Cloning and molecular characterization of the novel human melanin concentrating hormone receptor mch2. Mol Pharmacol, 2001, 60(4):632-9. 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