Figure 1: Treatment of HUVE cells with VEGF stimulates phosphorylation of VEGFR-2 at Tyr1175, detected by PathScan® Phospho-VEGFR-2 (Tyr1175) Sandwich ELISA kit, #7335, but does not affect the level of total VEGFR-2 protein detected by PathScan® Total VEGFR-2 Sandwich ELISA kit, #7340. OD450 readings are shown in the top figure, while the corresponding Western blot using Phospho-VEGFR-2 (Tyr1175) Rabbit mAb #2478 (right panel) or VEGFR-2 Rabbit mAb (7340-55B11) (left panel), is shown in the bottom figure.
Figure 2: Linear relationship between protein concentration of lysates from VEGF-treated HUVE cells and kit assay optical density readings. HUVE cells (85% confluence) were treated with VEGF (50 ng/ml), and lysed after growth at 37°C for 2 min.
|7340C||1 Kit (96 assays)||$ 513|
|Product Includes||Volume||Solution Color|
|VEGFR-2 Mouse mAb Coated Microwells||96 tests|
|VEGF Receptor 2 Rabbit Detection mAb||1 ea||Green (Lyophilized)|
|Anti-rabbit IgG, HRP-linked Antibody (ELISA Formulated)||1 ea||Red (Lyophilized)|
|Detection Antibody Diluent||11 ml||Green|
|HRP Diluent||11 ml||Red|
|TMB Substrate 7004||11 ml|
|STOP Solution 7002||11 ml|
|Sealing Tape||2 ea|
|ELISA Wash Buffer (20X) 9801||25 ml|
|ELISA Sample Diluent||25 ml||Blue|
|Cell Lysis Buffer (10X) 9803||15 ml|
CST's PathScan® Total VEGFR-2 Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of total VEGFR-2 protein. A VEGFR-2 Mouse mAb (7335-1D6*) has been coated onto the microwells. After incubation with cell lysates, Both nonphospho- and phospho-VEGFR-2 proteins are captured by the coated antibody. Following extensive washing, a VEGFR-2 Rabbit mAb (7340-55B11*) is added to detect the captured VEGFR-2 protein. HRP-linked anti-rabbit antibody (#7074*) is then used to recognize the bound detection antibody. HRP substrate, TMB, is added to develop color. The magnitude of optical density for this developed color is proportional to the quantity of total VEGFR-2 protein.
* Antibodies in this kit are custom formulations specific to the kit.
NOTE: Prepare solutions with purified water.
*NOTE: Some PathScan® ELISA Kits may include HRP-Linked Streptavidin in place of HRP-Linked Antibody.
NOTE: Initial color of positive reaction is blue, which changes to yellow upon addition of STOP Solution.
posted November 2013
Protocol Id: 204
CST's PathScan® Total VEGFR-2 Sandwich ELISA Kit detects endogenous levels of total VEGFR-2 protein. Using PathScan® Phospho-VEGFR-2 (Tyr1175) Sandwich ELISA Kit #7335, a significant induction of phospho-VEGFR-2 in HUVE* cells treated with VEGF can be detected. However, the level of total VEGFR-2 (phospho and non-phospho), detected by this Sandwich ELISA Kit #7340, remains unchanged (Figure 1). This kit detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species.
*Human Umbilical Vein Endothelial Cells
Vascular endothelial growth factor receptor 2 (VEGFR2, KDR, Flk-1) is a major receptor for VEGF-induced signaling in endothelial cells. Upon ligand binding, VEGFR2 undergoes autophosphorylation and becomes activated (1). Major autophosphorylation sites of VEGFR2 are located in the kinase insert domain (Tyr951/996) and in the tyrosine kinase catalytic domain (Tyr1054/1059) (2). Activation of the receptor leads to rapid recruitment of adaptor proteins, including Shc, GRB2, PI3 kinase, NCK, and the protein tyrosine phosphatases SHP-1 and SHP-2 (3). Phosphorylation at Tyr1212 provides a docking site for GRB2 binding and phospho-Tyr1175 binds the p85 subunit of PI3 kinase and PLCγ, as well as Shb (1,4,5). Signaling from VEGFR2 is necessary for the execution of VEGF-stimulated proliferation, chemotaxis and sprouting, as well as survival of cultured endothelial cells in vitro and angiogenesis in vivo (6-8).
Explore pathways + proteins related to this product.
Except as otherwise expressly agreed in a writing signed by a legally authorized representative of CST, the following terms apply to Products provided by CST, its affiliates or its distributors. Any Customer's terms and conditions that are in addition to, or different from, those contained herein, unless separately accepted in writing by a legally authorized representative of CST, are rejected and are of no force or effect.
Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST's products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST's Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.