|Detection of Human Serpin E1/PAI‑1 by Western Blot. Western blot shows lysates of HUVEC human umbilical vein endothelial cells. PVDF membrane was probed with 1 µg/mL of Mouse Anti-Human Serpin E1/PAI‑1 Monoclonal Antibody (Catalog # MAB1786) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF018). A specific band was detected for Serpin E1/PAI‑1 at approximately 48 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.|
Neutralization of Serpin E1/|
PAI‑1 Activity by Human Serpin E1/PAI‑1 Antibody.
Recombinant Human u‑Plasminogen Activator (uPA)/Urokinase (0.1 µg/mL, Catalog # 1310-SE) activity is measured in the presence of Recombinant Human Serpin E1/PAI-1 (0.25 µg/mL, Catalog # 1786-PI) that has been preincubated with increasing concentrations of Mouse Anti-Human Serpin E1/PAI‑1 Monoclonal Antibody (Catalog # MAB1786). The ND50 is typically 0.3 µg/mL.
|Detection of Human Serpin E1/PAI‑1 by Simple WesternTM. Simple Western lane view shows lysates of HUVEC human umbilical vein endothelial cells, loaded at 0.2 mg/mL. A specific band was detected for Serpin E1/PAI‑1 at approximately 54 kDa (as indicated) using 2.5 µg/mL of Mouse Anti-Human Serpin E1/PAI‑1 Monoclonal Antibody (Catalog # MAB1786). This experiment was conducted under reducing conditions and using the 12-230 kDa separation system.|
As a member of the Serpin superfamily of serine protease inhibitors, Serpin E1/PAI-1 is the principal inhibitor of urokinase-type plasminogen activator (uPA) and tissue-type plasminogen activator (tPA) (1, 2). As important regulators of extracellular matrix remodeling, uPA and PAI-1 play a major role in many processes such as angiogenesis, tumor invasion and obesity (2‑4). For example, uPA and PAI-1 are the only tumor prognostic factors validated at the highest level of evidence with regard to their clinical utility in breast cancer (5). The human PAI-1 is initially synthesized as 402 amino acid precursor with a N-terminal signal peptide (6, 7). PAI-1 may exist in one of two possible conformations, designated as active or latent (8).
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