Guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit
Test principle of guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit:
The guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA). Standards with known concentrations of substances to be tested, samples of unknown concentration are added to the microplates. Detection. The test substance and the biotin-labeled antibody are first incubated simultaneously. After washing, avidin-labeled HRP was added. After incubation and washing, the unbound enzyme conjugate is removed, then the substrates A, B, and the enzyme conjugate are added simultaneously. Produce color. The depth of the color is proportional to the concentration of the substance to be tested in the sample.
Content and preparation of guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit 
Guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit for self-contained materials
1) Distilled water.
2) Sampler: 5ul, 10ul, 50ul, 100ul, 200ul, 500ul, 1000ul.
3) Oscillator and magnetic stirrer.
Safety of guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit
1) Avoid direct contact with the stop solution and substrates A, B. Once exposed to these liquids, rinse with water as soon as possible.
2) Do not eat, drink, smoke or use cosmetics during the experiment.
3) Do not use the mouth to absorb any ingredients in the kit.
Precautions for guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit
1) Reagents should be stored according to the label instructions and returned to room temperature before use. The diluted standard should be discarded and cannot be stored.
2) The slats not used in the experiment should be immediately put back into the packaging bag and sealed to prevent deterioration.
3) Other reagents that are not used should be packaged or covered. Do not mix reagents of different batches. Use before warranty.
4) Use a disposable tip to avoid cross-contamination. Avoid pipettes with metal parts when drawing stop solution and substrate A and B.
5) Configure the wash solution using a clean plastic container. Mix all the ingredients and samples in the kit thoroughly before use.
6) When washing the enzyme plate, fully pat dry, do not put the absorbent paper directly into the enzyme standard reaction well to absorb water.
7) Substrate A should be volatilized to avoid opening the lid for a long time. Substrate B is sensitive to light and avoids prolonged exposure to light. Avoid contact with hands and be toxic. The OD value should be read immediately after the experiment is completed.
8) The order of addition of reagents should be consistent to ensure that all wells are incubated for the same time.
9) The incubation operation is carried out according to the time indicated in the instruction, the amount of liquid addition and the order.
Method for collecting, processing and preserving sample of guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit
1) Serum ---- Avoid any cell irritation during the procedure. Use tubes containing pyrogen and endotoxin. After collecting the blood, the serum and red blood cells were quickly and carefully separated by centrifugation at 1000 x g for 10 minutes.
2) Plasma-----EDTA, citrate, heparin plasma can be used for detection. The pellet was removed by centrifugation at 1000 x g for 30 minutes.
3) Cell supernatant - 1000 x g was centrifuged for 10 minutes to remove particles and polymer.
4) Tissue homogenization-----The tissue is added to the appropriate amount of physiological saline and mashed. Centrifuge at 1000 × g for 10 minutes, take the supernatant
5) Storage ------If the sample is not used immediately, it should be divided into small parts - 70 ° C to avoid repeated freezing. Do not use hemolysis or hyperlipemia as much as possible. If there are large amounts of particles in the serum, centrifuge or filter before testing. Do not heat thaw at 37 ° C or higher. It should be thawed at room temperature and ensure that the sample is fully thawed evenly.
Preparation of guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit reagent
1) Standard: The serial dilution of the standard should be prepared during the experiment and cannot be stored. Mix the standard shakes before dilution.
2) Dilution of washing buffer (50×): 50-fold dilution of distilled water.
Guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit
1) Mix all reagents thoroughly before use. Do not allow the liquid to generate a large amount of foam, so as to avoid adding a large amount of air bubbles during the loading, resulting in errors in the loading.
2) Determine the number of slats required based on the number of samples to be tested plus the number of standards. Multiple holes are recommended for each standard and blank hole. Each sample is determined according to its own quantity, and the double hole can be used as much as possible. The specimen was diluted 1:1 with the specimen dilution and 50 ul was added to the reaction well.
3) Add 50 ul of the diluted standard to the reaction well, and add 50 ul of the sample to be tested to the reaction well. Immediately add 50 ul of biotinylated antibody. Cover the membrane, mix gently by shaking, and incubate for 1 hour at 37 °C.
4) Remove the liquid from the well, fill each well with the washing solution, shake for 30 seconds, remove the washing solution, and pat dry with absorbent paper. Repeat this operation 3 times. If washing with a washer, the number of washings is increased once.
5) Add 80 ul of affinity streptavidin-HRP per well, mix gently by shaking, and incubate at 37 ° C for 30 minutes.
6) Remove the liquid from the well, fill each well with the washing solution, shake for 30 seconds, remove the washing solution, and pat dry with absorbent paper. Repeat this operation 3 times. If washing with a washer, the number of washings is increased once.
7) Add 50 ul of each of the substrates A and B to each well, mix gently by shaking, and incubate at 37 ° C for 10 minutes. Avoid lighting.
8) Remove the microplate and quickly add 50 ul of stop solution. Immediately after adding the stop solution, the results should be determined.
9) The OD value of each well was measured at a wavelength of 450 nm.
Limitation of guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit
The results above the No. 6 standard are non-linear and no accurate results can be obtained from this standard curve.
Guinea pig matrix metalloproteinase-9 (MMP-9) ELISA kit kit performance
1. Sensitivity: The minimum detection concentration is less than the No. 1 standard. The linearity of the dilution. The linear regression coefficient of the sample and the expected concentration correlation coefficient R value was 0.990.
2. Specificity: Does not react with other cytokines.
3. Repeatability: The coefficient of variation between the plate and the plate is less than 10%.
Judgment and analysis of ELISA test kit for guinea pig matrix metalloproteinase-9 (MMP-9)
1. Instrument value: read the OD value of each hole on a microplate reader with a wavelength of 450 nm.
2. The absorbance OD value is the ordinate (Y), and the corresponding test substance concentration is the abscissa (X), and the corresponding curve is made. The content of the sample to be tested can be converted from the standard curve according to the OD value. The corresponding concentration.
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