ab Progesterone Human ELISA Kit

Transcription

1 Version 4 Last updated 26 February 2018 ab Progesterone Human ELISA Kit This product is for research use only and is not intended for diagnostic use. Copyright 2017 Abcam. All rights reserved

2 Table of Contents 1. Overview 1 2. Protocol Summary 2 3. Precautions 3 4. Storage and Stability 3 5. Limitations 4 6. Materials Supplied 4 7. Materials Required, Not Supplied 5 8. Technical Hints 6 9. Reagent Preparation Sample Preparation Assay Procedure Typical Data Typical Sample Values Assay Specificity Troubleshooting Notes 19 Copyright 2017 Abcam. All rights reserved

3 1. Overview ab is intended for the quantitative determination of progesterone concentration in Human serum. Progesterone is a C21 steroid which is synthesized from both tissue and circulating cholesterol. Cholesterol is transformed to pregnenolone which is then converted via a combined dehydrogenase and isomerase to progesterone. The principle production sites are the adrenals and ovaries and the placenta during pregnancy. The majority of this steroid is metabolized in the liver to pregnanediol and conjugated as a glucuronide prior to excretion by the kidneys. Human Annexin A3 ELISA Kit 1

4 2. Protocol Summary ab is based on the principle of competitive binding between progesterone in the test specimen and progesterone-hrp conjugate for a constant amount of rabbit anti- progesterone. In the incubation, goat anti-rabbit IgG-coated wells are incubated with 25 μl progesterone standards, controls, samples, 100 μl progesterone- HRP Conjugate Reagent and 50 μl rabbit anti-progesterone reagent at room temperature (18-25 C) for 90 minutes. During the incubation, a fixed amount of HRP-labeled progesterone competes with the endogenous progesterone in the standard, sample, or quality control serum for a fixed number of binding sites of the specific progesterone antibody. Thus, the amount of progesterone peroxidase conjugate immunologically bound to the well progressively decreases as the concentration of progesterone in the specimen increases. Unbound progesterone peroxidase conjugate is then removed and the wells washed. Next, a solution of TMB Reagent is then added and incubated at room temperature for 20 minutes, resulting in the development of blue color. The color development is stopped with the addition of Stop Solution, and the absorbance is measured spectrophotometrically at 450 nm. The intensity of the color formed is proportional to the amount of enzyme present and is inversely related to the amount of unlabeled progesterone in the sample. Human Annexin A3 ELISA Kit 2

5 3. Precautions Please read these instructions carefully prior to beginning the assay. All kit components have been formulated and quality control tested to function successfully as a kit. We understand that, occasionally, experimental protocols might need to be modified to meet unique experimental circumstances. However, we cannot guarantee the performance of the product outside the conditions detailed in this protocol booklet. Reagents should be treated as possible mutagens and should be handled with care and disposed of properly. Please review the Safety Datasheet (SDS) provided with the product for information on the specific components. Observe good laboratory practices. Gloves, lab coat, and protective eyewear should always be worn. Never pipet by mouth. Do not eat, drink or smoke in the laboratory areas. All biological materials should be treated as potentially hazardous and handled as such. They should be disposed of in accordance with established safety procedures. 4. Storage and Stability Store kit at +4 C immediately upon receipt. Kit has a storage time of 1 year from receipt, providing components have not been reconstituted. Refer to list of materials supplied for storage conditions of individual components. Observe the storage conditions for individual prepared components in the Materials Supplied section. Human Annexin A3 ELISA Kit 3

6 5. Limitations Serum samples demonstrating gross lipemia, gross hemolysis, or turbidity should not be used with this test. The wash procedure is critical. Insufficient washing will result in poor precision and falsely elevated absorbance readings. Assay kit intended for research use only. Not for use in diagnostic procedures. Do not mix or substitute reagents or materials from other kit lots or vendors. Kits are QC tested as a set of components and performance cannot be guaranteed if utilized separately or substituted. 6. Materials Supplied Item Goat anti-rabbit IgG Coated Microplate (12 x 8 wells) Quantity Storage Condition 96 wells 4 C Progesterone Control ml 4 C Progesterone Control ml 4 C Progesterone Reference Standard 1 (0 ng/ml) 0.5 ml 4 C Progesterone Reference Standard 2 (0.5 ng/ml) 0.5 ml 4 C Progesterone Reference Standard 3 (3.0 ng/ml) 0.5 ml 4 C Progesterone Reference Standard 4 (10 ng/ml) 0.5 ml 4 C Progesterone Reference Standard 5 (25 ng/ml) 0.5 ml 4 C Progesterone Reference Standard 6 (50 ng/ml) 0.5 ml 4 C Progesterone-HRP Conjugate Concentrate (11x) 1.3 ml 4 C Progesterone-HRP Conjugate Diluent 12 ml 4 C Rabbit Anti-Progesterone Reagent (0.01%) 7 ml 4 C Stop Solution 11 ml 4 C TMB Substrate Solution 11 ml 4 C Human Annexin A3 ELISA Kit 4

7 7. Materials Required, Not Supplied These materials are not included in the kit, but will be required to successfully perform this assay: Precision pipettes: 25 μl, 50 μl, 100 μl, 200 μl, and 1.0 ml. Disposable pipette tips. Distilled or deionized water. Vortex mixer or equivalent. Absorbent paper or paper towel. Linear-linear graph paper. Microtiter plate reader with a bandwidth of 10 nm or less and an optical density range of 0-3 O.D. at 450 nm wavelength. Human Annexin A3 ELISA Kit 5

8 8. Technical Hints This kit is sold based on number of tests. A test simply refers to a single assay well. The number of wells that contain sample, control or standard will vary by product. Review the protocol completely to confirm this kit meets your requirements. Please contact our Technical Support staff with any questions. Selected components in this kit are supplied in surplus amount to account for additional dilutions, evaporation, or instrumentation settings where higher volumes are required. They should be disposed of in accordance with established safety procedures. Make sure all buffers and solutions are at room temperature before starting the experiment. Samples generating values higher than the highest standard should be further diluted in the appropriate sample dilution buffers. Avoid foaming or bubbles when mixing or reconstituting components. Avoid cross contamination of samples or reagents by changing tips between sample, standard and reagent additions. Ensure plates are properly sealed or covered during incubation steps. Make sure you have the right type of plate for your detection method of choice. Make sure the heat block/water bath and microplate reader are switched on before starting the experiment. Human Annexin A3 ELISA Kit 6

9 9. Reagent Preparation To prepare Working Progesterone-HRP Conjugate Reagent, add 0.1 ml of Progesterone-HRP Conjugate Concentrate (11x) to 1.0 ml of Progesterone-HRP Conjugate Diluent (1:10 dilution) and mix well. The amount of conjugate diluted depends on your assay size. Discard the excess after use. Equilibrate all reagents to room temperature (18-25 C) prior to use. The kit contains enough reagents for 96 wells. Prepare only as much reagent as is needed on the day of the experiment. 10. Sample Preparation 10.1 Serum: Only human serum should be used. No special pretreatment of sample is necessary. Serum samples may be stored at 2-8 C for up to 24 hours, and should be frozen at 10 C or lower for longer periods. Do not use grossly hemolyzed or grossly lipemic specimens. Δ Note: Samples containing sodium azide should not be used in the assay. 11. Assay Procedure Equilibrate all materials and prepared reagents to room temperature prior to use. We recommend that you assay all standards, controls and samples in duplicate Secure the desired number of coated wells in the holder Dispense 25 μl of standards, specimens, and controls into appropriate wells Dispense 100 μl of Working Progesterone-HRP Conjugate Reagent into each well Dispense 50 μl of rabbit anti-progesterone reagent to each well 11.5 Thoroughly mix for 30 seconds. It is very important to mix completely. Human Annexin A3 ELISA Kit 7

10 11.6 Incubate at room temperature (18-25 C) for 90 minutes Rinse and flick the microtiter wells 5 times with distilled or deionized water. (Please do not use tap water.) 11.8 Dispense 100 μl of TMB Reagent into each well. Gently mix for 10 seconds Incubate at room temperature (18-25 C) for 20 minutes Stop the reaction by adding 100 μl of Stop Solution to each well Gently mix for 30 seconds. It is important to make sure that all the blue color changes to yellow color completely Read absorbance at 450nm with a microtiter plate reader within 15 minutes Data Analysis Calculate the mean absorbance value (A 450 ) for each set of reference standards, controls and samples Construct a standard curve by plotting the mean absorbance obtained for each reference standard against its concentration in ng/ml on a linear-linear graph paper, with absorbance values on the vertical or Y axis, and concentrations on the horizontal or X axis Use the mean absorbance values for each specimen to determine the corresponding concentration of Progesterone in ng/ml from the standard curve Any values obtained for diluted samples must be further converted by applying the appropriate dilution factor in the calculations. Human Annexin A3 ELISA Kit 8

11 12. Typical Data Typical standard curve data provided for demonstration purposes only. A new standard curve must be generated for each assay performed. Figure 1. Example of progesterone standard curve. The standard curve was prepared as described in Section 10. Raw data values are shown in the table. Background-subtracted data values (mean +/- SD) are graphed. Human Annexin A3 ELISA Kit 9

12 13. Typical Sample Values SENSITIVITY The minimum detectable concentration of Progesterone using ab108654, as measured by 2 SD from the mean of a zero standard, is estimated to be ng/ml. PRECISION Intra-Assay: Within-run precision was determined by replicate determinations of four different serum samples in one assay. Withinassay variability is shown below: Serum Sample # Reps Mean Progesterone (ng/ml) S.D C.V. (%) Inter-Assay: Between-run precision was determined by replicate measurements of four different serum samples over a series of individually calibrated assays. Between-assay variability is shown below: Human Annexin A3 ELISA Kit 10

13 Serum Sample # Reps Mean Progesterone (ng/ml) S.D C.V. (%) EXPECTED VALUES Each laboratory should establish its own normal range based on the patient population. The Progesterone Human ELISA Kit was performed on randomly selected outpatient clinical laboratory samples. Males: adult ng/ml Prepubertal (children) Females: follicular phase luteal phase post menopausal Pregnancy: 1st trimester 2nd trimester 3rd trimester ng/ml ng/ml ng/ml ng/ml ng/ml ng/ml ng/ml Human Annexin A3 ELISA Kit 11

14 RECOVERY Various serum samples of known Progesterone levels were combined and assayed in duplicate. The mean recovery was 111.3%. PAIR NO. EXPECTED [Progesterone] OBSERVED [Progesterone] % RECOVERY (ng/ml) (ng/ml) Human Annexin A3 ELISA Kit 12

15 LINEARITY OF DILUTION Four patient samples were serially diluted to determine linearity. The mean linearity was 105.9%. # Dilution Expected Conc. (ng/ml) Observed Conc. (ng/ml) % Expected 1 Undiluted : : : : : : : Mean = 113.8% 2 Undiluted : : : : : : : Human Annexin A3 ELISA Kit 13

16 Mean = 97.9% 3 Undiluted : : : : : : Mean = 95.1% 4 Undiluted : : : : : : : Mean = 116.9% Human Annexin A3 ELISA Kit 14

17 14. Assay Specificity This kit recognizes Human Progesterone. The following materials have been checked for cross reactivity. The percentage indicates cross reactivity at 50% displacement compared to Progesterone. Data on the cross-reactivity for several endogenous and pharmaceutical steroids are summarized in the following table: Cross reactivity (%) = Observed Progesterone Concentration x 100 Steroid Concentration Steroid Cross-Reactivity (%) Progesterone 100 Androsterone Corticosterone 0.74 Cortisone 0.11 Cholesterol < 0.08 Estradiol < 0.01 Estrone 0.08 Estriol < Prednisolone Testosterone 0.1 Please contact our Technical Support team for more information. Human Annexin A3 ELISA Kit 15

18 15. Troubleshooting Problem Reason Solution Low Precision Poor standard curve Use of expired components Improper wash step Splashing of reagents while loading wells Inconsistent volumes loaded into wells Insufficient mixing of reagent dilutions Improperly sealed microplate Improper standard dilution Standard improperly reconstituted (if applicable) Standard degraded Curve doesn't fit Check the expiration date listed before use. Do not interchange components from different lots Check that the correct wash buffer is being used. Check that all wells are empty after aspiration. Check that the microplate washer is dispensing properly. If washing by pipette, check for proper pipetting technique Pipette properly in a controlled and careful manner Pipette properly in a controlled and careful manner. Check pipette calibration. Check pipette for proper performance Thoroughly agitate the lyophilized components after reconstitution. Thoroughly mix dilutions Check the microplate pouch for proper sealing. Check that the microplate pouch has no punctures. Check that three desiccants are inside the microplate pouch prior to sealing Confirm dilutions made correctly Briefly spin vial before opening; thoroughly resuspend powder (if applicable) Store sample as recommended Try plotting using different scale Human Annexin A3 ELISA Kit 16

19 Low signal Large CV High background scale Incubation time too short Target present below detection limits of assay Precipitate can form in wells upon substrate addition when concentration of target is too high Using incompatible sample type (e.g. serum vs. cell extract) Sample prepared incorrectly Bubbles in wells All wells not washed equally/thoroughly Incomplete reagent mixing Inconsistent pipetting Inconsistent sample preparation or storage Wells are insufficiently washed Contaminated wash buffer Waiting too long to read plate after adding STOP solution Try overnight incubation at 4 C Decrease dilution factor; concentrate samples Increase dilution factor of sample Detection may be reduced or absent in untested sample types Ensure proper sample preparation/dilution Ensure no bubbles present prior to reading plate Check that all ports of plate washer are unobstructed/wash wells as recommended Ensure all reagents/master mixes are mixed thoroughly Use calibrated pipettes and ensure accurate pipetting Ensure consistent sample preparation and optimal sample storage conditions (eg. minimize freeze/thaws cycles) Wash wells as per protocol recommendations Make fresh wash buffer Read plate immediately after adding STOP solution Human Annexin A3 ELISA Kit 17

20 Low sensitivity Improper storage of ELISA kit Using incompatible sample type (e.g. Serum vs. cell extract) Store all reagents as recommended. Δ Note all reagents may not have identical storage requirements. Detection may be reduced or absent in untested sample types For further technical questions please do not hesitate to contact us by or phone (select contact us on for the phone number for your region). Human Annexin A3 ELISA Kit 18

21 16. Notes Human Annexin A3 ELISA Kit 19

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24 Technical Support Copyright 2017 Abcam, All Rights Reserved. The Abcam logo is a registered trademark. All information / detail is correct at time of going to print. Austria wissenschaftlicherdienst@abcam.com France supportscientifique@abcam.com Germany wissenschaftlicherdienst@abcam.com Spain soportecientifico@abcam.com Switzerland technical@abcam.com Deutsch: Français: UK, EU and ROW technical@abcam.com +44(0) Canada ca.technical@abcam.com US and Latin America us.technical@abcam.com Asia Pacific hk.technical@abcam.com (852) China cn.technical@abcam.com Japan technical@abcam.co.jp +81-(0) Singapore sg.technical@abcam.com Australia au.technical@abcam.com +61-(0) New Zealand nz.technical@abcam.com +64-(0) Copyright 2017 Abcam. All rights reserved