Calprotectin ELISA Kit

Produktnummer ABIN5564625

Produktdetails Calprotectin ELISA Kit

Target: Calprotectin (S100A8/A9)

Reaktivität: Human

Nachweismethode: Colorimetric

Methodentyp: Sandwich ELISA

Detektionsbereich: 0.078-5 ng/mL

Untere Nachweisgrenze: 0.078 ng/mL

Applikation: ELISA

Verwendungszweck: The AssayMax™ Human Calprotectin ELISA (Enzyme-Linked Immunosorbent Assay) Kit is designed for detection of calprotectin in human plasma, serum, urine, saliva, milk, CSF, and cell culture samples. This assay employs a quantitative sandwich enzyme immunoassay technique that measures human calprotectin in approximately 4 hours. A polyclonal antibody specific for human calprotectin has been pre-coated onto a 96-well microplate with removable strips. Calprotectin in standards and samples is sandwiched by the immobilized antibody and a biotinylated polyclonal antibody specific for human calprotectin, which is recognized by a streptavidin-peroxidase (SP) conjugate. All unbound material is washed away and a peroxidase enzyme substrate is added. The color development is stopped and the intensity of the color is measured.

Marke: AssayMax™

Proben: Cell Culture Cells, Cerebrospinal Fluid, Milk, Plasma, Saliva, Serum, Urine

Analytische Methode: Quantitative

Bestandteile: Human Calprotectin Microplate: A 96-well polystyrene microplate (12 strips of 8 wells) coated with a polyclonal antibody against human calprotectin. Sealing Tapes: Each kit contains 3 precut, pressure sensitive sealing tapes that can be cut to fit the format of the individual assay. Human Calprotectin Standard: Human calprotectin in a buffered protein base (5 ng, lyophilized). Biotinylated Human Calprotectin Antibody (50x): A 50-fold concentrated biotinylated polyclonal antibody against human calprotectin (120 l). MIX Diluent Concentrate (10x): A 10-fold concentrated buffered protein base (30 ml). Wash Buffer Concentrate (20x): A 20-fold concentrated buffered surfactant (30 ml, 2 bottles). SP Conjugate (100x): A 100-fold concentrate (80 l). Chromogen Substrate (1x): A stabilized peroxidase chromogen substrate tetramethylbenzidine (8 ml). Stop Solution (1x): A 0.5 N hydrochloric acid solution to stop the chromogen substrate reaction (12 ml).

Benötigtes Material: Microplate reader capable of measuring absorbance at 405 nm. Pipettes (1-20 µL, 20-200 µL, and multiple channel). Deionized or distilled reagent grade water Incubator (37 °C)

Anwendungsinformationen

Testdauer: 4 h

Plattentyp: Pre-coated

Protokoll:

• Step 1. Add 50 μL of Standard or Sample per well. Incubate 2 hours.
• Step 2. Wash, then add 50 μL of Biotinylated Antibody per well. Incubate 1 hour.
• Step 3. Wash, then add 50 μL of SP Conjugate per well. Incubate 30 minutes.
• Step 4. Wash, then add 50 μL of Chromogen Substrate per well. Incubate 20 minutes.
• Step 5. Add 50 μL of Stop Solution per well. Read at 450 nm immediately.

Aufbereitung der Reagenzien:

Freshly dilute all reagents and bring all reagents to room temperature before use. MIX Diluent Concentrate (10x): If crystals have formed in the concentrate, mix gently until the crystals have completely dissolved. Dilute the MIX Diluent Concentrate 10-fold with reagent grade water to produce a 1x solution. Store for up to 30 days at 2-8 °C. Human Calprotectin Standard: Reconstitute the Human Calprotectin Standard (5 ng) with 1 mL of MIX Diluent to generate a 5 ng/mL standard stock solution. Allow the vial to sit for 10 minutes with gentle agitation prior to making dilutions. Prepare duplicate or triplicate standard points by serially diluting from the standard stock solution (5 ng/mL) 2-fold with equal volume of MIX Diluent to produce 2.5, 1.25, 0.625, 0.313, 0.156, and 0.078 ng/mL solutions. MIX Diluent serves as the zero standard (0 ng/mL). Any remaining stock solution should be stored at -20 °C and used within 30 days. Avoid repeated freeze-thaw cycles. Standard Point Dilution [Calprotectin] (ng/mL) P1 1 part Standard (5 ng/mL) 5.0 P2 1 part P1 + 1 part MIX Diluent 2.5 P3 1 part P2 + 1 part MIX Diluent 1.25 P4 1 part P3 + 1 part MIX Diluent 0.625 P5 1 part P4 + 1 part MIX Diluent 0.313 P6 1 part P5 + 1 part MIX Diluent 0.156 P7 1 part P6 + 1 part MIX Diluent 0.078 P8 MIX Diluent 0.0 5 Biotinylated Human Calprotectin Antibody (50x): Spin down the antibody briefly and dilute the desired amount of the antibody 50-fold with MIX Diluent to produce a 1x solution. The undiluted antibody should be stored at -20 °C. Wash Buffer Concentrate (20x): If crystals have formed in the concentrate, mix gently until the crystals have completely dissolved. Dilute the Wash Buffer Concentrate 20-fold with reagent grade water to produce a 1x solution. SP Conjugate (100x): Spin down the SP Conjugate briefly and dilute the desired amount of the conjugate 100-fold with MIX Diluent to produce a 1x solution. The undiluted conjugate should be stored at -20 °C.

Probennahme: Plasma: Collect plasma using one-tenth volume of 0.1 M sodium citrate as an anticoagulant. Centrifuge samples at 3000 x g for 10 minutes and collect plasma. A 2000-fold sample dilution is suggested into MIX Diluent, however, user should determine optimal dilution factor depending on application needs. The undiluted samples can be stored at -20 °C or below for up to 3 months. Avoid repeated freeze-thaw cycles (EDTA or Heparin can also be used as an anticoagulant). Serum: Samples should be collected into a serum separator tube. After clot formation, centrifuge samples at 3000 x g for 10 minutes and remove serum. A 2000-fold sample dilution is suggested into MIX Diluent, however, user should determine optimal dilution factor depending on application needs. The undiluted samples can be stored at -20 °C or below for up to 3 months. Avoid repeated freeze-thaw cycles. Urine: Collect urine using sample pot. Centrifuge samples at 800 x g for 10 minutes. A 200-fold sample dilution is suggested into MIX Diluent, however, user should determine optimal dilution factor depending on application needs. The undiluted samples can be stored at -20 °C or below for up to 3 months. Avoid repeated freeze-thaw cycles. Saliva: Collect saliva using sample tube. Centrifuge samples at 800 x g for 10 minutes. A 10000-fold sample dilution is suggested into MIX Diluent, however, user should determine optimal dilution factor depending on application needs. The undiluted samples can be stored at -20 °C or below for up to 3 months. Avoid repeated freeze-thaw cycles. Milk: Collect milk using sample tube. Centrifuge samples at 800 x g for 10 minutes. An 80000-fold sample dilution is suggested into MIX Diluent, however, user should determine optimal dilution factor depending on application needs. The undiluted samples can be stored at -20 °C or below for up to 3 months. Avoid repeated freeze-thaw cycles. CSF: Collect cerebrospinal fluid (CSF) using sample pot. Centrifuge samples at 3000 x g for 10 minutes. A 200-fold sample dilution is suggested into MIX Diluent, however, user should determine optimal dilution factor depending on application needs. The undiluted samples can be stored at -80 °C for up to 3 months. Avoid repeated freeze-thaw cycles. Cell Culture Supernatants: Centrifuge cell culture media at 3000 x g for 10 minutes at 4 °C to remove debris and collect supernatants. Samples can be stored at -20 °C or below. Avoid repeated freeze-thaw cycles.

Testdurchführung:

Prepare all reagents, standard solutions, and samples as instructed. Bring all reagents to room temperature before use. The assay is performed at room temperature (20-25 °C). Remove excess microplate strips from the plate frame and return them immediately to the foil pouch with desiccants inside. Reseal the pouch securely to minimize exposure to water vapor and store in a vacuum desiccator. Add 50 l of Human Calprotectin Standard or sample to each well. Gently tap plate to thoroughly coat the wells. Break any bubbles that may have formed. Cover wells with a sealing tape and incubate for 2 hours. Start the timer after the last addition. Wash five times with 200 l of Wash Buffer manually. Invert the plate each time and decant the contents, hit 4-5 times on absorbent material to completely remove the liquid. If using a machine, wash six times with 300 l of Wash Buffer and then invert the plate, decanting the contents, hit 4-5 times on absorbent material to completely remove the liquid. Add 50 l of Biotinylated Human Calprotectin Antibody to each well. Gently tap plate to thoroughly coat the wells. Break any bubbles that may have formed. Cover wells with a sealing tape and incubate for 1 hour. Wash the microplate as described above. Add 50 l of SP Conjugate to each well. Gently tap plate to thoroughly coat the wells. Break any bubbles that may have formed. Cover wells with a sealing tape and incubate for 30 minutes. Turn on the microplate reader and set up the program in advance. Wash the microplate as described above. Add 50 l of Chromogen Substrate to each well. Gently tap plate to thoroughly coat the wells. Break any bubbles that may have formed. Incubate for 20 minutes or until the optimal blue color density develops. 6 Add 50 l of Stop Solution to each well. The color will change from blue to yellow. Gently tap plate to ensure thorough mixing. Break any bubbles that may have formed. Read the absorbance on a microplate reader at a wavelength of 450 nm immediately. If wavelength correction is available, subtract readings at 570 nm from those at 450 nm to correct optical imperfections. Otherwise, read the plate at 450 nm only. Please note that some unstable black particles may be generated at high concentration points after stopping the reaction for about 10 minutes, which will reduce the readings.

Ergebnisberechnung:

• Calculate the mean value of the duplicate or triplicate readings for each standard and sample.
• To generate a standard curve, plot the graph using the standard concentrations on the x-axis and the corresponding mean 450 nm absorbance (OD) on the y-axis. The best-fit line can be determined by regression analysis using log-log or four-parameter logistic curve-fit.
• Determine the unknown sample concentration from the standard curve and multiply the value by the dilution factor.

Beschränkungen: Nur für Forschungszwecke einsetzbar

Handhabung

Handhabung: This product is for Research Use Only and is not intended for use in diagnostic procedures. Prepare all reagents (diluent buffer, wash buffer, standard, biotinylated antibody, and SP conjugate) as instructed, prior to running the assay. Prepare all samples prior to running the assay. The dilution factors for the samples are suggested in this insert. However, the user should determine the optimal dilution factor. Spin down the SP conjugate vial and the biotinylated antibody vial before opening and using contents. 2 The Stop Solution is an acidic solution. The kit should not be used beyond the expiration date.

Lagerung: 4 °C,-20 °C

Informationen zur Lagerung: Upon arrival, immediately store components of the kit at recommended temperatures up to the expiration date. Store SP Conjugate and Biotinylated Antibody at -20°C. Store Microplate, Diluent Concentrate (10x), Wash Buffer, Stop Solution, and Chromogen Substrate at 2-8°C. Unused microplate wells may be returned to the foil pouch with the desiccant packs and resealed. May be stored for up to 30 days in a vacuum desiccator. Diluent (1x) may be stored for up to 30 days at 2-8°C. Store Standard at 2-8°C before reconstituting with Diluent and at -20°C after reconstituting with Diluent.

Details zu Calprotectin

Target: Calprotectin (S100A8/A9)

Andere Bezeichnung: Calprotectin (S100A8/A9 Produkte)

Synonyme: 60B8AG ELISA Kit, CAGB ELISA Kit, CFAG ELISA Kit, CGLB ELISA Kit, L1AG ELISA Kit, LIAG ELISA Kit, MAC387 ELISA Kit, MIF ELISA Kit, MRP14 ELISA Kit, NIF ELISA Kit, P14 ELISA Kit, Mrp14 ELISA Kit, MRP-14 ELISA Kit, p14 ELISA Kit, 60B8Ag ELISA Kit, AW546964 ELISA Kit, BEE22 ELISA Kit, Cagb ELISA Kit, GAGB ELISA Kit, L1Ag ELISA Kit, S100 calcium binding protein A9 ELISA Kit, S100 calcium binding protein A9 (calgranulin B) ELISA Kit, S100A9 ELISA Kit, S100a9 ELISA Kit

Hintergrund: Calprotectin, a heterodimeric complex of S100-A8/A9, is a member of the S100 family of EF-hand calcium-binding proteins with more than 20 members. Calprotectin consists of two 14 kDa amino acid chains (MRP14, S100-A9) and one 8 kDa amino acid chain (MRP8, S100-A8). It is localized in the cytoplasm and nucleus of a wide range of cells and involved in the regulation of cell cycle progression and differentiation. Calprotectin is a danger associated molecular pattern molecule, which is released by activated phagocytes and has been shown as a critical proinflammatory mediator in chronic and acute inflammatory processes (1-2).

Gen-ID: 6279

UniProt: P05109

Pathways: S100 Proteine