Mouse OVA IgG1 ELISA. Catalog Number M046072

Transcription

1 Mouse OVA IgG1 ELISA Catalog Number M For the quantitative determination of Ovalbumin specific IgG1 in mouse plasma, serum, tissue and cell culture supernate samples. For research use only. This product insert must be read in its entirety before using this product.

2 summary and explanation The Mouse OVA IgG1 ELISA Kit is designed to detect and quantify OVA specific IgG1 in mouse serum, plasma, cell culture supernatant and tissue samples. principle of the assay The assay employs a quantitative sandwich enzyme immunoassay technique which measures mouse ovalbumin specific IgG1 (OVA specific IgG1). A mouse monoclonal antibody specific for mouse OVA specific IgG1 has been pre-coated onto a microplate. Mouse OVA specific IgG1 in standards and samples is sandwiched by the immobilized antibody and a biotinylated polyclonal antibody specific for mouse OVA specific IgG1, which is recognized by a streptavidin-hrp conjugate. All unbound material is then washed away and a peroxidase enzyme substrate is added. The color development is stopped with acid and the intensity of the color is measured at 450 nm. kit components Microplate - The plate contains 12 x 8-well strips coated with a mouse monoclonal antibody against mouse OVA IgG1. Ready to use. Standard - Mouse OVA IgG1 (48 ng/ml). Biotinylated anti-ova IgG1 Antibody - Concentrated biotinylated polyclonal antibody specific to mouse OVA IgG1. Standard Diluent Wash Buffer Streptavidin-HRP Conjugate Chromogen Substrate A Chromogen Substrate B Stop Solution Plate Sealers - 2 adhesive strips. IN30400.R00 page 2

3 Storage Unopened kit Opened/Reconstituted Reagents Store at 2-8º C. Do not use past the kit expiration date. Standard Diluent Wash Buffer Substrate Solutions Stop Solution Biotinylated Antibody HRP Conjugate Standard Microplate Wells Store at 2-8º C for up to 30 days. Store at -20º C for up to 30 days. Avoid repeated freeze-thaw cycles. Return unused wells to the foil pouch containing the desiccant and seal. Store at 2-8º C for up to 30 days. supplies required but not provided Pipettes or pipetting equipment with disposable polypropylene tips Glass measuring cylinders Distilled or deionized water Squirt bottle or automated microplate washer Microplate reader capable of measuring at 450 nm Shaker/Vortexer 37º C incubater (optional) precautions Stop Solution consists of diluted hydrochloric acid. Wear eye, hand, face, and clothing protection when using these materials. Avoid contact with skin and eyes. In case of contact wash immediately with water. All chemicals should be considered as being potentially hazardous. We therefore recommend that this product is handled only by those persons who have been trained in laboratory techniques and that it is used in accordance with the principles of good laboratory practice. For research use only. Not for internal or external use in humans or animals. This kit contains no material of human origin. For the handling of blood (serum), we recommend that precautions should be observed. Please refer to HHS Publication no. (CDC) or corresponding local/ national guidelines on laboratory safety procedures. IN30400.R00 products@mdbiosciences.com page 3

4 Sample COLLECTION & STORAGE Plasma - Collect plasma using tubes containing EDTA or sodium citrate as an anticoagulant. Centrifuge samples at RPM for 20 minutes and assay. (EDTA or Heparin can also be used as an anticoagulant) Serum - Allow the blood sample to clot for minutes at room temperature (22-25 C). After clot formation, centrifuge samples at RPM for 20 minutes. When sediments occurred during storage, centrifugation should be performed again. Cell Culture Supernatants - Collect in sterile tubes. Centrifuge samples at RPM for 20 minutes. Collect the supernatants carefully. When examining cell extracts, use PBS (ph ) to dilute cell suspension to approximately 1 million/ml. Centrifuge at RPM for 20 minutes. Collect the supernatants carefully. Avoid repeated freeze-thaw cycles. When sediments occurred during storage, centrifugation should be performed again. Tissue - Excise sample and weigh up. Add a certain amount of PBS (ph 7.4). Freeze with liquid nitrogen immediately for later use. Thaw the sample and keep it at 2-8 C. Add PBS (ph 7.4) and then homogenize the sample thoroughly either by hand, with a homogenizer or through repeated freeze-thaw cycles. Centrifuge at RPM for 20 minutes. Collect the supernatants carefully. Aliquot and keep one for examination and freeze the others for later use. After collecting the sample, extraction should be immediately carried out in accordance with related documents. After extraction, experiment should be conducted immediately as well. Otherwise, keep the sample at -20 C. Avoid repeated freeze-thaw cycles. Samples containing NaN3 must not be tested as it inhibits the activity of Horse Radish Peroxidase (HRP). reagent preparation Bring all reagents to room temperature (22-25 C) before use. Reagents can easily be trapped in the caps of small microfuge tubes. It is recommended to briefly centrifuge these reagents before use. Wash Buffer - If crystals have formed in the concentrate, warm to room temperature (22-25 C) and mix gently until the crystals have completely dissolved. Dilute 20 ml of the Wash Buffer Concentrate into 580 ml of deionized water to prepare 600 ml of Wash Buffer. Store for up to 30 days at 2-8 C. Standards - Label 5 standard tubes as shown below. Serially dilute the original standard solution (48 ng/ml) two-fold with equal volume of standard diluent to produce 24 ng/ml, 12 ng/ml, 6 ng/ml, 3 ng/ml and 1.5 ng/ml. Any remaining standard should be frozen at -20 C and used within 30 days. 120 μl Serial Dilutions using 120 μl 48 ng/ml OVA IgG1 Standard 24 ng/ml 12 ng/ml 6 ng/ml 3 ng/ml 1.5 ng/ml IN30400.R00 page 4

5 assay protocol Read the entire protocol before beginning the assay. It is recommended that all standards and samples be assayed in duplicate. Reagents can easily be trapped in the caps of small microfuge tubes. It is recommended to briefly centrifuge these reagents before use. Note: Reagents and samples may require specific handling temperatures and need preparation prior to the assay. See the Reagent and Sample Preparation sections before proceeding. Note: Bring all reagents and samples to room temperature (22-25 C) before use Prepare all reagents and samples as described in the previous sections. Remove any excess microplate strips from the plate frame and return them to the foil pouch containing the desiccant pack. Pipette 40 µl of Standard or sample in duplicate into the wells using a clean pipette tip for each standard or sample. Add 10 µl of Biotinylated Antibody into each well. Add 50 µl of HRP Conjugate to each well. Gently tap the side of the plate to ensure thorough mixing. Cover with the plate sealer provided and incubate for 2 hours at room temperature (22-25 C) or for 1 hour at 37 C. Aspirate and wash the wells 5 times with 200 µl per well of Wash Buffer. Take care that all wells are filled and emptied at each wash. Blot the plate on paper towels to remove residual fluid from the plate. Add 50 µl each of Substrate A and Substrate B to each well and incubate for 10 minutes at room temperature(22-25 C) or until optimal color density develops. Gently tap the side of the plate to ensure thorough mixing. Note: Substrate B is sensitive to light and therefore should not be exposed to light for too long. Stop the reaction by adding 50 µl of Stop Solution to each well. Read the plate at 450 nm. If wavelength correction is available, subtract readings at 570 nm from those at 450 nm to correct optical imperfections. If it is not available, read plate at 450 nm only. Note: some unstable black particles may be generated at high concentration points after stopping the reaction at 10 minutes, which may reduce the absorbance readings. IN30400.R00 products@mdbiosciences.com page 5

6 Summary Prepare reagents and samples as previously described. ] ] ] ] ] ] Pipette 40 µl Standard or sample in duplicate into the wells. Add 10 µl of Biotinylated Antibody to each well. Add 50 µl HRP Conjugate to each well. Incubate for 2 hrs. at RT. Aspirate and wash 5 times. Add 50 µl each of Substrate A and Substrate B to each well. Incubate 10 min. at RT. Add 50 µl of Stop Solution to each well. Read at 450 nm. IN30400.R00 page 6

7 calculation of results 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 on the y-axis. The best-fit line can be determined by regression analysis of the linear portion of the curve. Determine the unknown sample concentration from the Standard Curve and multiply the dilution factor. The curve is provided for illustration only. A standard curve should be generated each time the assay is performed. PERFORMANCE CHARACTERISTICS Assay Range 0.1 ng/ml - 40 ng/ml Sensitivity Sensitivity is defined as the minimal detectable dose determined by adding two standard deviations of the mean optical density value for replicates of the zero standard and calculating the corresponding concentration. The sensitivity of the Mouse OVA IgG1 ELISA is typically ~ ng/ml. Reproducibility Intra-assay Precision (Precision within an assay) - The intra-assay precision was measured by assaying control samples multiple times on one plate. The intra-assay precision coefficient of variation (CV) is <10%. Inter-assay Precision (Precision between assays) - The inter-assay precision was assessed by repeated measurements of control samples in successive assays with multiple users. The inter-assay precision coefficient of variation (CV) is <12%. IN30400.R00 products@mdbiosciences.com page 7

8 TROUBLESHOOTING Problem Low Absorbance High Absorbance/high zero standard value Flat curve/poor reproduciblity Recommendation Check reagents for proper storage. Control expiration date. Check preparation of reagents. Control incubation times and temperature. Check reader wavelength. Check preparation of reagents. Control incubation times and temperature. Equilibrate ELISA reagents to room temperature. Ensure that every well of the ELISA plate is completely filled and emptied at every wash step. Check that plates are blotted on tissue paper after washing. Check reagents for proper storage. Control expiration date. Check preparation of working standards. Check incubation times and temperatures. Use separate reservoirs for pipetting different solutions with multichanned pipettes. Always use new pipette tips. Check pipette calibration. Ensure efficient washing procedure. IN30400.R00 page 8

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12 North America MD Bioproducts Divison of MD Biosciences, Inc University Ave. W. Ste. 100 St. Paul, MN USMDBIO Tel: Fax: International/Headquarters MD Bioproducts Division of MD Biosciences GmbH Gewerbestrasse Egg b Zurich Switzerland Tel: Fax: products@mdbiosciences.com