Millipore′s Ready-to-Assay GPCR frozen cells are designed for simple, rapid calcium assays with no requirement for intensive cell culturing. Millipore has optimized the freezing conditions to provide cells with high viability and functionality post-thaw. The user simply thaws the cells and resuspends them in media, dispenses cell suspension into assay plates and, following over night recovery, assays for calcium response.

The muscarinic acetylcholine receptor family consists of five GPCRs that mediate some of the neurotransmission functions of acetylcholine in the CNS and the periphery. The M5 receptor, along with the M1 and M3 receptors, signal through Gq/11 and subsequent release of Ca++ from the ER (Caulfield and Birdsall, 1998). Although M5 is expressed in the CNS at relatively low levels, it appears to be the only muscarinic acetylcholine receptor expressed in midbrain dopaminergic neurons, and it has been shown to mediate dopamine release from these neurons. The M5 receptor is also expressed in blood vessels in the brain and the periphery, and studies with M5 knockout mice demonstrate that M5 mediates the vasodilatory action of acetylcholine on cerebral microvessels. Further studies with M5 knockout mice also indicate a role for M5 in the rewarding effects of cocaine and morphine (Wess, 2004). Millipore′s cloned human M5-expressing cell line is made in the Chem-1 host, which supports high levels of recombinant M5 expression on the cell surface for functional detection via the calcium signaling pathway. Thus, the cell line is an ideal tool for screening for agonists, antagonists and modulators at M5.

Pack contains 2 vials of mycoplasma-free cells, 1 ml per vial. Fifty (50) mL of Media Component.

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