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Anti upa antibody

Manufactured by Abcam
Sourced in United States

Anti-uPA antibody is a laboratory reagent used to detect and quantify the urokinase plasminogen activator (uPA) protein. uPA is an enzyme involved in the breakdown of the extracellular matrix, and its expression is often associated with cancer progression and metastasis. The anti-uPA antibody can be used in various analytical techniques, such as Western blotting, immunohistochemistry, and ELISA, to measure the levels of uPA in biological samples.

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6 protocols using anti upa antibody

1

Quantifying uPA Levels in Murine Pancreatic β Cells

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Murine pancreatic β cells, NIT-1 cells (American Type Cell Culture, Manassas, VA), were seeded in culture platelet and treated with normal (7 mM) or high (25 mM) glucose culture medium for 24 or 48 h, respectively. Culture media from each well were collected, and uPA levels were measured by Mouse uPA Total Antigen Assay ELISA kit (Molecular Innovations, Novi, MI). Thereafter, equal amounts of protein (30 μg) from each well, after harvesting cells, were separated by gel. The gel was electroblotted onto a nitrocellulose membrane, and then incubated with 1:1000 dilutions of anti-uPA antibody (Abcam, Cambridge, MA), at 4 °C overnight. After incubation in horseradish peroxidase-conjugated anti-rabbit antibody, the membrane-bound antibody detected was incubated with Western blot detection system and captured on X-ray film.
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2

Detailed Antibody Labeling and Purification Protocol

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ATN-291 was manufactured by SDIX [12 (link)]. Fluorescein isothiocyanate (FITC)- and Cy3-labeled secondary antibodies used in flow cytometry or histology were purchased from Jackson Immunoresearch Laboratories, Inc. (West Grove, CA). Anti-uPA antibody, anti-uPAR antibody and anti-β-actin antibody (conjugated with horseradish peroxidase [HRP]) used in Western blotting were both purchased from Abcam (Cambridge, MA, USA). Secondary HRP antibodies were purchased from Jackson ImmunoResearch (St. Louis, MO, USA). p-SCN-Bn-Df (i.e. p-isothiocyanatobenzyl-desferrioxamine B) was acquired from Macrocyclics, Inc. (Cat #: B-705, Dallas, TX). Chelex 100 resin (50 – 100 mesh) was purchased from Sigma-Aldrich (St. Louis, MO). Buffers used in this study were prepared from Millipore-grade water and pre-treated with Chelex 100 resin to ensure that the aqueous solution was free of heavy metals. Size exclusion PD-10 columns were purchased from GE Healthcare (Piscataway, NJ). All other chemicals were purchased from Thermo Fisher Scientific (Fair Lawn, NJ).
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3

Western Blot Analysis of uPA

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Cells were lysed in 200 μl cell lysis buffer (Cell Signaling Technology; Danvers, MA) supplemented with a protease inhibitor cocktail (Roche Diagnostics, Basel, Switzerland); protein concentrations were determined with the BCA protein assay (Thermo-Fisher, Waltham, MA). After electrophoresis on 4–12% SDS-PAGE gels, proteins were transferred to a PVDF membrane and blocked for 1 h in Tris-buffered saline with 5% nonfat milk at room temperature, similarly to what was previously described (Guizzetti et al., 2007 (link)). The PVDF membranes were incubated with an anti-uPA antibody (Abcam, Cambridge, UK; dilution 1:1000) for 2 h at room temperature followed by an anti-rabbit HRP-conjugated secondary antibody (BD Biosciences, San Jose, CA; dilution 1:5000) for 1 h at room temperature. After detection of uPA immunoreactivity, the membranes were stripped and re-probed with a β-actin antibody (Sigma, St. Louis, MO; 1:10,000 dilution) for 30 min followed by an anti-mouse HRP-conjugated secondary antibody (BD Biosciences, San Jose, CA; dilution 1:3000) for 30 min at room temperature. Densitometric analyses of uPA and β-actin immunoreactivity bands were carried out using the software ImageJ.
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4

NIT-1 Cell Responsiveness to uPA and Antibody

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NIT-1 cells were incubated with normal (7 mM) or high glucose (25 mM), respectively. The first group of NIT-1 cells was treated with 0.01 IU/mL or 1 IU/mL of uPA (Yao Chih Hsiang Inc., Taiwan) in culture medium. The second group of NIT-1 cells was treated with 0.6 nM or 60 nM of anti-uPA antibody (Abcam, Cambridge, MA, USA) in culture medium. The third group of NIT-1 cells was treated with uPA and uPA antibody at the same time. Insulin secretion rate and cell proliferation of β cells were measured (method as described above).
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5

Immunoprecipitation of Urokinase-Type Plasminogen Activator

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IP was conducted with protein G agarose beads (Thermo Fisher Scientific, Waltham, MA, USA) according to the manufacturer’s instructions. Cells after transfection were lysed and incubated in IP lysis buffer (Beyotime) for 10 min at room temperature. The extracts were incubated with anti-uPA-antibody (2 μg/ml, Abcam, Cambridge, UK) at 4 °C overnight, and the immunoprecipitants were purified by protein G agarose beads with gentle rocking. The beads were washed for three times with extraction buffer and resuspended in 20 μl SDS-loading buffer. The whole cell lysates and immunoprecipitants were incubated at 70 °C for 10 min followed with western blot analysis.
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6

Western Blot Analysis of uPA

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Cells were lysed in 200 μl cell lysis buffer (Cell Signaling Technology; Danvers, MA) supplemented with a protease inhibitor cocktail (Roche Diagnostics, Basel, Switzerland); protein concentrations were determined with the BCA protein assay (Thermo-Fisher, Waltham, MA). After electrophoresis on 4–12% SDS-PAGE gels, proteins were transferred to a PVDF membrane and blocked for 1 h in Tris-buffered saline with 5% nonfat milk at room temperature, similarly to what was previously described (Guizzetti et al., 2007 (link)). The PVDF membranes were incubated with an anti-uPA antibody (Abcam, Cambridge, UK; dilution 1:1000) for 2 h at room temperature followed by an anti-rabbit HRP-conjugated secondary antibody (BD Biosciences, San Jose, CA; dilution 1:5000) for 1 h at room temperature. After detection of uPA immunoreactivity, the membranes were stripped and re-probed with a β-actin antibody (Sigma, St. Louis, MO; 1:10,000 dilution) for 30 min followed by an anti-mouse HRP-conjugated secondary antibody (BD Biosciences, San Jose, CA; dilution 1:3000) for 30 min at room temperature. Densitometric analyses of uPA and β-actin immunoreactivity bands were carried out using the software ImageJ.
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