ChemiSCREEN™ Human Recombinant mGlu2 Metabotropic Glutamate Receptor Calcium-Optimized Ready-to-Assay Cells
Description:
ChemiSCREEN™ Human Recombinant mGlu2 Metabotropic Glutamate Receptor Calcium-Optimized Ready-to-Assay Cells
Product Overview:
Full-length human GRM2 cDNA encoding mGlu2
Background Information:
Millipore's Ready-To-Assay Calcium-Optimized Cells are GPCR-expressing cells designed for simple, rapid calcium assays with no requirement for culturing cells. The user simply thaws the cells with maximal viability, dispenses into assay plates, and assays for calcium response the next day.
The Ready-To-Assay cells are derived from ChemiScreen calcium-optimized stable cell lines, which express the GPCR target of interest at high levels on the cell surface, in a host cell line containing high levels of the promiscuous Gα15 protein to couple the receptor to the calcium signaling pathway. The Ready-To-Assay cells are prepared by chemical treatment at a concentration optimized for effective growth arrest while maintaining high viability (>80%) after thawing and overnight plating. Pharmacological functionality of the Ready-To-Assay cells is identical to that of the originating GPCR cell line.
Glutamate is a main excitatory neurotransmitter in the central nervous system, and it plays a role in learning, memory and neurotoxicity. The biological actions of glutamate are mediated by ionotropic and metabotropic glutamate receptors, which are ion channels and GPCRs respectively. Metabotropic glutamate receptors (mGluRs) are members of the class 3 G-protein coupled receptor family, which are characterized by a large extracellular domain. They are further classified into group I, II, and III mGluRs on the basis of their sequence identity, pharmacology, and signal transduction mechanism. Group I (mGlu1 and mGlu5) couple to the phospholipase C pathway through Gαq, whereas group II (mGlu2 and mGlu3) and group III (mGlu4, mGlu6, mGlu7, and mGlu8) negatively couple to the adenylyl cyclase pathway though Gαi (Conn and Pin, 1997). Agonists of the Group II metabotropic glutamate receptors, mGlu2 and mGlu3, display efficacy in animal models of anxiety and psychosis. A key role for mGlu2 in mediating these effects is indicated by the observation that selective allosteric potentiator of mGlu2 also retains antipsychotic-like activities in mice (Galici et al., 2005). In addition, mGlu2/3 agonists display analgesic activity in animal models (Jones et al., 2005).
The Ready-To-Assay cells are derived from ChemiScreen calcium-optimized stable cell lines, which express the GPCR target of interest at high levels on the cell surface, in a host cell line containing high levels of the promiscuous Gα15 protein to couple the receptor to the calcium signaling pathway. The Ready-To-Assay cells are prepared by chemical treatment at a concentration optimized for effective growth arrest while maintaining high viability (>80%) after thawing and overnight plating. Pharmacological functionality of the Ready-To-Assay cells is identical to that of the originating GPCR cell line.
Glutamate is a main excitatory neurotransmitter in the central nervous system, and it plays a role in learning, memory and neurotoxicity. The biological actions of glutamate are mediated by ionotropic and metabotropic glutamate receptors, which are ion channels and GPCRs respectively. Metabotropic glutamate receptors (mGluRs) are members of the class 3 G-protein coupled receptor family, which are characterized by a large extracellular domain. They are further classified into group I, II, and III mGluRs on the basis of their sequence identity, pharmacology, and signal transduction mechanism. Group I (mGlu1 and mGlu5) couple to the phospholipase C pathway through Gαq, whereas group II (mGlu2 and mGlu3) and group III (mGlu4, mGlu6, mGlu7, and mGlu8) negatively couple to the adenylyl cyclase pathway though Gαi (Conn and Pin, 1997). Agonists of the Group II metabotropic glutamate receptors, mGlu2 and mGlu3, display efficacy in animal models of anxiety and psychosis. A key role for mGlu2 in mediating these effects is indicated by the observation that selective allosteric potentiator of mGlu2 also retains antipsychotic-like activities in mice (Galici et al., 2005). In addition, mGlu2/3 agonists display analgesic activity in animal models (Jones et al., 2005).
Application Notes:
Calcium flux assay
Species Reactivity:
Human
Usage Statement:
Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
Alternate Names:
mGluR2
Host Cells:
Chem-1, an adherent cell line expressing the promiscuous G protein, Gα15.
Materials Required but Not Delivered:
PLATING MEDIA: DMEM containing 4.5 g/L glucose and 4 mM L-glutamine/10% heat inactivated dialyzed fetal bovine serum/7.5 mg/L Glycine/11.5 mg/L Proline/10.5 mg/L Serine/8.9 mg/L Alanine/13.3 mg/L Aspartic Acid/10 mM HEPES/100U/ml each penicillin and streptomycin
Gene Symbol:
- GRM2
- mGlu2
- GPRC1B
- MGLUR2
- mGluR2
- GLUR2
Analytes Available:
mGlu2
Presentation:
Cells are frozen at 1 x 107 cells/mL in DMEM/20% fetal bovine serum/100 U/ml penicillin and streptomycin/10% DMSO.
Quality Assurance:
| EC50 for L-Glutamate (nM) | Maximum Signal (RFU) | Z' | |
| Ready-To-Assay Cells | 108 | 2225 | 0.54 |
| Continuous Passage Cells | 123 | 2289 | 0.86 |
Detection Methods:
Radioactive
Kit or Assay Type:
Cell Based Assays
Protein or Enzyme Type:
GPCRs
Species:
Human
Storage Conditions:
Place cells in liquid nitrogen immediately upon receipt. Maintain frozen in liquid nitrogen for up to 5 years.
1) Thaw cells rapidly by removing from liquid nitrogen and immediately immersing in a 37°C water bath. Immediately after ice has thawed, sterilize the exterior of the vial with 70% ethanol.
2) Transfer contents of the vial to a sterile 15 mL conical tube. Add 10 mL prewarmed plating media to the cells and mix gently to resuspend cells. Centrifuge at 200 x g. Remove all but 0.5 mL media.
3) Resuspend cells to 0.5 x 106 cells/mL in plating media. Dispense the cell suspension into a 96-well assay plate at 200 µL per well to obtain a density of approximately 1 x 105 cells/well.
4) Place the assay plate in a humidified 37°C incubator with 5% CO2.
5) The cells may be assayed 16-24 hours after plating. Replace media with fresh media one hour before testing the cells. It is recommended to wash the cells with assay buffer at least once prior to addition of loading dye.
1) Thaw cells rapidly by removing from liquid nitrogen and immediately immersing in a 37°C water bath. Immediately after ice has thawed, sterilize the exterior of the vial with 70% ethanol.
2) Transfer contents of the vial to a sterile 15 mL conical tube. Add 10 mL prewarmed plating media to the cells and mix gently to resuspend cells. Centrifuge at 200 x g. Remove all but 0.5 mL media.
3) Resuspend cells to 0.5 x 106 cells/mL in plating media. Dispense the cell suspension into a 96-well assay plate at 200 µL per well to obtain a density of approximately 1 x 105 cells/well.
4) Place the assay plate in a humidified 37°C incubator with 5% CO2.
5) The cells may be assayed 16-24 hours after plating. Replace media with fresh media one hour before testing the cells. It is recommended to wash the cells with assay buffer at least once prior to addition of loading dye.