Human GPNMB/Osteoactivin ELISA Kit PicoKine®, Carrier-free

Transmembrane glycoprotein NMB is a protein that in humans is encoded by the GPNMB gene. In osteoblast progenitor cells, GPNMB works as a positive regulator of osteoblast differentiation during later stages of matrix maturation and mineralization that is mediated at least in part by BMP-2 in a SMAD1 dependent manner to promote osteoblast differentiation. GPNMB can enhance the repairing process in bone fracture, demonstrated by its high expression during chondrogenesis (soft callus) and osteogenesis (hard callus) compared to the intact femurs that is why Osteoactivin (OA) could be a novel therapeutic agent used to treat generalized osteoporosis or localized osteopenia during fracture repair by stimulating bone growth and regeneration. Similarly, GPNMB expression increases during osteoclast differentiation and it is functionally implicated in this process, possibly by promoting the fusion of osteoclast progenitor cells.

<table cellpadding="3"><tr><th>Lots</th><th>Lot 1 (pg/ml)</th><th>Lot 2 (pg/ml)</th><th>Lot 3 (pg/ml)</th><th>Lot 4 (pg/ml)</th><th>Mean (pg/ml)</th><th>Standard Deviation</th><th>CV (%)</th></tr><tr><td>Sample 1</td><td>261</td><td>223</td><td>225</td><td>245</td><td>238</td><td>15.58</td><td>6.5%</td></tr><tr><td>Sample 2</td><td>2107</td><td>1918</td><td>1797</td><td>1774</td><td>1899</td><td>131.96</td><td>6.9%</td></tr><tr><td>Sample 3</td><td>5612</td><td>4864</td><td>5831</td><td>5547</td><td>5463</td><td>361.75</td><td>6.6%</td></tr></table>*number of samples for each test n=16.

Up-regulated in various cancer cells, including in glioblastoma multiforme. Expressed in many melanoma cells, as well as in tissue macrophages, including liver Kuppfer cells and lung alveolar macrophages, in podocytes and in some cells of the ciliary body of the eye (at protein level). Hardly detectable in healthy brain. .

Description|Quantity Pre-coated 96-well strip microplate|1 Standard|2 vials Biotinylated antibody (100x)|100ul Avidin-Biotin-Peroxidase Complex (100x)|100ul Sample Diluent|30ml Antibody Diluent|12ml Avidin-Biotin-Peroxidase Diluent|12ml Color Developing Reagent (TMB)|10ml Stop Solution|10ml Wash Buffer (25x)|20ml Adhesive plate sealers|4

Store at 4℃ for 6 months, at -20℃ for 12 months. Avoid multiple freeze-thaw cycles (Ships with gel ice, can store for up to 3 days in room temperature. Freeze upon receiving.)

Cell membrane; Single-pass type I membrane protein. Melanosome. Identified by mass spectrometry in melanosome fractions from stage I to stage IV. Detected at the cell surface in different types of cancers cells, including glioblastoma multiforme cells and most melanoma cell lines.