PGE2 ELISA Kit
PGE2 ELISA Kit
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Product Specification
| Usage | Required experimental equipment: 1. Microplate reader (450nm) 2. High-precision pipettes and pipette tips: 0.5-10uL, 5-50uL, 20-200uL, 200-1000uL 3. 37°C incubator 4. Distilled or deionized water Sample handling and requirements: The detection range of the kit is not equivalent to the concentration range of the analyte in the sample. Before the experiment, it is recommended to estimate the analyte concentration in the sample based on relevant literature and conduct preliminary experiments to determine the actual concentration in the sample. If the analyte concentration in the sample is too high or too low, dilute or concentrate the sample appropriately. If the sample type is not listed in the instructions, it is recommended to conduct a preliminary experiment to verify the validity of the test. Serum: Collect whole blood in a serum separator tube at room temperature for 2 hours or at 2-8°C overnight, then centrifuge at 1000×g for 20 minutes. Remove the supernatant, or store at -20°C or -80°C, but avoid repeated freezing and thawing. Plasma: Collect the sample using EDTA or heparin as an anticoagulant. Within 30 minutes of collection, centrifuge at 1000×g for 15 minutes at 2-8°C. Remove the supernatant for testing, or store at -20°C or -80°C, but avoid repeated freezing and thawing. Other biological fluids: Centrifuge at 1000×g for 20 minutes. Remove the supernatant for testing. Tissue homogenate: Rinse the tissue with pre-chilled PBS (0.01M, pH 7.4) to remove residual blood (lysed red blood cells in the homogenate may affect the test results). Weigh and mince the tissue. Add the minced tissue to the appropriate volume of PBS (generally a 1:9 weight-to-volume ratio, e.g., 1g of tissue sample to 9mL of PBS. The specific volume can be adjusted according to experimental needs and recorded. It is recommended to add protease inhibitors to the PBS) in a glass homogenizer and thoroughly grind on ice or in a homogenizer. To further lyse tissue cells, the homogenate can be sonicated or repeatedly freeze-thawed. Finally, centrifuge the homogenate at 5000×g for 5-10 minutes and remove the supernatant for analysis. Cell culture supernatant: Centrifuge at 1000×g for 20 minutes. Remove the supernatant and analyze it immediately, or store it at -20°C or -80°C, but avoid repeated freeze-thaw cycles. Cell lysis buffer: Gently wash adherent cells with ice-cold PBS, then trypsinize and harvest the cells by centrifugation at 1000×g for 5 minutes. Suspension cells can be harvested directly by centrifugation. Wash the collected cells three times with pre-chilled PBS and resuspend in 150-200 μL of PBS per 1 × 10^6 cells (protease inhibitors are recommended; if the cell count is very low, the PBS volume can be reduced appropriately). Disrupt the cells by repeated freeze-thaw cycles or sonication. Centrifuge the extract at 1500 × g for 10 minutes at 2-8°C, and remove the supernatant for testing. Other biological samples: Centrifuge at 1000 × g for 20 minutes, and remove the supernatant for testing. Sample Appearance: The sample should be clear and transparent, and any suspended matter should be removed by centrifugation. Sample Storage: Samples collected for testing within one week can be stored at 4°C. If testing is not possible, aliquot the sample into single-use aliquots and freeze at -20°C (for testing within one month) or -80°C (for testing within six months). Avoid repeated freeze-thaw cycles. Hemolysis of the sample can affect the final test results, so hemolyzed samples are not suitable for this test. Pre-Assay Preparation: 1. Remove the test kit from the refrigerator 10 minutes in advance and equilibrate to room temperature. 2. Prepare the gradient working solution for the standard: Add 1 mL of universal diluent to the lyophilized standard. Let stand for 15 minutes to completely dissolve, then gently mix (concentration is 200 pg/mL). Then dilute to the following concentrations: 200 pg/mL, 100 pg/mL, 50 pg/mL, 25 pg/mL, 12.5 pg/mL, 6.25 pg/mL, 3.12 pg/mL, and 0 pg/mL. Serial Dilution Method: Add 500 μL of universal diluent to each of seven EP tubes. Pipette 500 μL of the 200 pg/mL standard working solution into the first EP tube and mix thoroughly to make a 100 pg/mL standard working solution. Repeat this procedure for subsequent tubes. The last tube serves directly as a blank well; there is no need to aspirate the liquid from the penultimate tube. See the figure below for details.  3. Preparation of Biotin-Antibody Working Solution: 15 minutes before use, centrifuge the concentrated Biotin-Antibody at 1000×g for 1 minute. Dilute 100µL of concentrated Biotin-Antibody to a 1× working concentration with universal diluent (e.g., 10µL concentrate + 990µL universal diluent). Prepare immediately before use. 4. Preparation of Enzyme Conjugate Working Solution: 15 minutes before use, centrifuge the 100x concentrated enzyme conjugate at 1000×g for 1 minute. Dilute the 100× concentrated HRP enzyme conjugate to a 1× working concentration with universal diluent (e.g., 10 μL concentrate + 990 μL universal diluent). Prepare immediately. 5. Preparation of 1× Wash Solution: Add 10 mL of 20× Wash Solution to 190 mL of distilled water. (Concentrated wash solution removed from the refrigerator may crystallize; this is normal. Allow to stand at room temperature until the crystals have completely dissolved before preparing.) Procedure: 1. Remove the desired strips from the aluminum foil bag after equilibration at room temperature for 10 minutes. Seal the remaining strips in a ziplock bag and return them to 4°C. 2. Sample Addition: Add 50 μL of sample or standard of varying concentrations to the corresponding wells. Add 50 μL of universal diluent to the blank wells, followed by 50 μL of Biotin-Antibody Working Solution to each well. Cover with a film sealer and incubate at 37°C for 1 hour. (Recommendation: Dilute the sample to be tested at least 1-fold with universal diluent before adding it to the plate to minimize matrix effects. The sample concentration should be multiplied by the dilution factor when calculating the final sample concentration. It is recommended to run replicates for all samples and standards.) 3. Plate Wash: Discard the remaining liquid and add 300 μL of 1x Wash Solution to each well. Let stand for 1 minute, then shake off the solution and pat dry on absorbent paper. Repeat this process three times (a plate washer can also be used). 4. Enzyme Conjugate Working Solution: Add 100 μL of enzyme conjugate working solution to each well. Cover with a film sealer and incubate at 37°C for 30 minutes. 5. Washing: Discard the liquid and wash the plate five times as in step 3. 6. Adding substrate: Add 90 μL of substrate (TMB) to each well, cover with sealing film, and incubate at 37°C in the dark for 15 minutes. 7. Adding stop solution: Remove the plate and add 50 μL of stop solution directly to each well. Immediately measure the OD value of each well at 450 nm. Calculating experimental results: 1. Calculate the average OD value of the standard and sample replicates and subtract the OD value of the blank well as a correction factor. Plot a four-parameter logistic function standard curve on double-logarithmic graph paper with concentration as the horizontal axis and OD value as the vertical axis. 2. If the sample OD value is higher than the upper limit of the standard curve, dilute the sample and retest. Multiply the sample concentration by the corresponding dilution factor.  |
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| Sensitivity | 1.62 pg/mL | ||||||||||||||||||||||||||||||||
| Theory | This kit uses a competitive enzyme-linked immunosorbent assay (ELISA). Sample, standard, biotin-labeled antibody, and HRP enzyme conjugate are sequentially added to microwells pre-coated with prostaglandin E2 (PGE2) antigen. After incubation and washing, the assay is developed using the substrate TMB. TMB converts to blue under the catalysis of HRP and to yellow under the action of acid. The intensity of the color is inversely correlated with the amount of prostaglandin E2 (PGE2) in the sample. The absorbance (OD) is measured at 450 nm using a microplate reader to calculate the sample concentration. | ||||||||||||||||||||||||||||||||
| Source | All | ||||||||||||||||||||||||||||||||
| Synonym | Prostaglandin E2 ELISA Kit | ||||||||||||||||||||||||||||||||
| Detection Type | Competition Law | ||||||||||||||||||||||||||||||||
| Composition |
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| Background | Prostaglandin E2 (PGE2), also known as dinoprost, is a naturally occurring prostaglandin with oxytocic effects and is used as a medication. Dinoprost is used for induction of labor, postpartum hemorrhage, termination of pregnancy, and to maintain patency of the ductus arteriosus in newborns. In infants, it is used to treat congenital heart defects until surgery is possible. It is also used to treat gestational trophoblastic disease and can be administered vaginally or by intravenous injection. The synthesis of PGE2 in the body begins with the activation of arachidonic acid (AA) by phospholipase A2. Once activated, AA is oxidized by cyclooxygenase (COX) to form prostaglandin endoxidants. Specifically, prostaglandin G2 (PGG2) is modified by the peroxidase group of the COX enzyme to produce prostaglandin H2 (PGH2), which is then converted to PGE2. | ||||||||||||||||||||||||||||||||
| General Notes | 1. Strictly adhere to the specified incubation time and temperature to ensure accurate results. All reagents must be at room temperature (20-25°C) before use. Refrigerate reagents immediately after use. 2. Improper plate washing may result in inaccurate results. Ensure that all liquid in the wells is aspirated thoroughly before adding substrate. Do not allow the wells to dry out during incubation. 3. Remove any residual liquid and fingerprints from the bottom of the plate, as this will affect the OD value. 4. The substrate developer solution should be colorless or very light in color. Do not use substrate solution that has turned blue. 5. Avoid cross-contamination of reagents and specimens to prevent erroneous results. 6. Avoid direct exposure to strong light during storage and incubation. 7. Do not expose any reagents to bleaching solvents or the strong fumes emitted by bleaching solvents. Any bleaching agent will destroy the biological activity of the reagents in the kit. 8. Do not use expired products, and do not mix components with different product numbers and batches. 9. Recombinant proteins from sources other than the kit may not be compatible with the antibodies in this kit and will not be recognized. 10. If there is a possibility of disease transmission, all samples should be managed properly and samples and testing devices should be handled according to prescribed procedures. |
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| Storage Temp. | If the unopened kit is stored at 4°C, the shelf life is 6 months. | ||||||||||||||||||||||||||||||||
| Test Range | 3.12-200 pg/mL | ||||||||||||||||||||||||||||||||
| Applications | Serum, plasma, and other biological fluids |
