Estrone-3-Glucuronide ELISA Kit

Catalog No. ABIN2815098

Product Details

Target: Estrone-3-Glucuronide

Reactivity: Various Species

Detection Method: Colorimetric

Method Type: Sandwich ELISA

Application: ELISA

Purpose: The DetectX® Estrone-3-Glucuronide (E1G) Immunoassay kit uses a specifically generated anti- body to measure E1G and its metabolites in urine and fecal samples, or in extracted serum and plasma.

Brand: DetectX®

Sample Type: Fecal, Urine, Serum, Plasma, Tissue Culture Medium

Analytical Method: Quantitative

Cross-Reactivity (Details): The following cross reactants were tested in the assay and calculated at the 50 % binding point. Steroid Cross Reactivity: Estrone-3-glucuronide (E1G) 100 %, Estradiol-17-Sulfate 0.1 %, Estrone-3-Sulfate (E1S) 66.6 %, Progesterone < 0.1 %, Estrone 238 %, Estriol < 0.1 %, 17-Estradiol 7.8 %, Cortisol < 0.1 %, Estradiol-3-Glucuronide 3.8 %, Testosterone < 0.1 %, Estradiol-3-Sulfate 3.3 %, Pregnanediol < 0.1 %

Components: Coated Clear 96 Well Plates Clear plastic microtiter plate(s) coated with goat anti-rabbit IgG. 1 Or 5 Each
Estrone-3-Glucuronide (E1G) Standard Estrone-3-Glucuronide (E1G) at 10,000 pg/mL in a special stabilizing solution. 125 μL Or 625 μL
DetectX® Estrone-3-Glucuronide (E1G) Antibody A rabbit polyclonal antibody specific for Estrone-3-Glucuronide. 3 mL Or 13 mL
DetectX® Estrone-3-Glucuronide (E1G) Conjugate An Estrone-3-Glucuronide-peroxidase conjugate in a special stabilizing solution. 3 mL Or 13 mL
Assay Buffer Concentrate A 5X concentrate that should be diluted with deionized or distilled water. 28 Or 55 mL
Wash Buffer Concentrate A 20X concentrate that should be diluted with deionized or distilled water. 30 mL Or 125 mL
TMB Substrate 11 mL Or 55 mL
Stop Solution A 1M solution of hydrochloric acid. CAUSTIC. 5 mL Or 25 mL
Plate Sealer 1 Or 5 Each

Material not included: Distilled or deionized water.
Repeater pipet with disposable tips capable of dispensing 25 μL, 50 μL and 100 μL.
A microplate shaker.
Colorimetric 96 well microplate reader capable of reading optical density at 450 nm.
Software for converting raw relative optical density readings from the plate reader and carrying out four parameter logistic curve (4PLC) fitting.
Contact your plate reader manufacturer for de- tails.

Application Details

Application Notes: This assay has been validated for dried fecal, urine and tissue culture samples.
Samples contain- ing visible particulate should be centrifuged prior to using.
Estrone-3-glucuronide can be assayed in solid sample types by using one of the extraction protocols available on our website at: http:// www.ArborAssays.com/resources/lit.asp.
Estrone-3-glucuronide (E1G) is identical across all species and we expect this kit to measure estro- ne-1-glucuronide from all sources.
The end user should evaluate recoveries of E1G in other sample matrices being tested.

Plate: Pre-coated

Protocol: This kit is not recommended for serum, plasma, or saliva samples without extraction.
The kit will quantitatively measure E1G present in diluted buffer samples and tissue culture media samples.
Please read the complete kit insert before performing this assay.
An E1G standard is provided to generate a standard curve for the assay and all samples should be read off the stan- dard curve.
Standards or diluted samples are pipetted into a clear microtiter plate coated with an antibody to capture rabbit antibodies.
An E1G-peroxidase conjugate is added to the standards and samples in the wells.
The binding reaction is initiated by the addition of a polyclonal antibody to E1G to each well.
After a 2 hour incubation the plate is washed and substrate is added.
The substrate reacts with the bound E1G-peroxidase conjugate.
After a short incubation, the reaction is stopped and the intensity of the generated color is detected in a microtiter plate reader capable of measuring 450nm wavelength.
The concentration of the E1G in the sample is calculated, after making suitable correction for the dilution of the sample, using software available with most plate readers.

Reagent Preparation:

Allow the kit reagents to come to room temperature for 30 minutes.
We recommend that all standards and samples be run in duplicate to allow the end user to accurately determine estrone- 3-glucuronide concentrations.
Ensure that all samples have reached room temperature and have been diluted as appropriate prior to running them in the kit.
Assay Buffer Dilute Assay Buffer Concentrate 1:5 by adding one part of the concentrate to four parts of deion- ized water.
Once diluted this is stable at 4 °C for 3 months.
Wash Buffer Dilute Wash Buffer Concentrate 1:20 by adding one part of the concentrate to nineteen parts of deionized water.
Once diluted this is stable at room temperature for 3 months.
Standard Preparation Label seven test tubes as #1 through #7.
Pipet 450 μL of Assay Buffer into tube #1 and 200 μL into tubes #2 to #7.
The Estrone-3-Glucuronide stock solution contains an organic solvent.
Pre- rinse the pipet tip several times to ensure accurate delivery.
Carefully add 50 μL of the estrone- 3-glucuronide stock solution to tube #1 and vortex completely.
Take 200 μL of the estrone-3- glucuronide solution in tube #1 and add it to tube #2 and vortex completely.
Repeat the serial dilutions for tubes #3 through #7.
The concentration of estrone-3-glucuronide in tubes 1 through 7 will be 1,000, 500, 250, 125, 62.5, 31.25 and 15.625 pg/mL.
Use all Standards within 2 hours of preparation.

Sample Preparation:

Serum and Plasma Samples. We would recommend the following protocol for serum and plasma. 1. Add diethyl ether to serum or plasma samples at a 5:1 (v/v) ether:sample ratio. 2. Mix solutions by vortexing for 2 minutes. Allow ether layer to separate for 5 minutes. 3. Freeze samples in a dry ice/ethanol bath and pipet off the ether solution from the top of the sample into a clean tube. Repeat steps 1-3 for maximum extraction efficiency, combining top layer of ether solutions. 4. Dry pooled ether samples down in a speedvac for 2-3 hrs. If samples need to be stored they should be kept at -20 °C. 5. Redissolve samples at room temperature in the Assay Buffer. A minimum of 125 μL of the Assay Buffer is recommended for reconstitution to allow for duplicate sample measurement. Dried Fecal Samples We have a detailed Extraction Protocol available on our website at: http://www.ArborAssays.com/ resources/lit.asp. The ethanol concentration in the final Assay Buffer dilution added to the well should be <1 % . Urine Samples Urine samples should be diluted at least 1:8 times with the provided Assay Buffer. For comparison to creatinine as a urine volume marker please see our NIST-calibrated 2 plate and 10 plate Urinary Creatinine Detection kits, K002-H1 and K002-H5.

Assay Procedure:

1. Use the plate layout sheet on the back page to aid in proper sample and standard identification. Determine the number of wells to be used and return unused wells to the foil pouch with desiccant. Seal the ziploc plate bag and store at 4ºC.
   2. Pipet 50 μL of samples or standards into wells in the plate.
   3. Pipet 75 μL of Assay Buffer into the non-specific binding (NSB) wells.
   4. Pipet 50 μL of Assay Buffer into wells to act as maximum binding wells (Bo or 0 pg/mL).
   5. Add 25 μL of the DetectX® Estrone-3-Glucuronide Conjugate to each well using a repeater pipet.
   6. Add 25 μL of the DetectX® Estrone-3-Glucuronide Antibody to each well, except the NSB wells, using a repeater pipet.
   7. Gently tap the sides of the plate to ensure adequate mixing of the reagents. Cover the plate with the plate sealer and shake at room temperature for 2 hours. If the plate is not shaken signals bound will be approximately 35 % lower.
   8. Aspirate the plate and wash each well 4 times with 300 μL wash buffer. Tap the plate dry on clean absorbent towels.
   9. Add 100 μL of the TMB Substrate to each well, using a repeater pipet. 10. Incubate the plate at room temperature for 30 minutes without shaking. 11. Add 50 μL of the Stop Solution to each well, using a repeater pipet. 12. Read the optical density generated from each well in a plate reader capable of reading at 450 nm. 13. Use the plate reader's built-in 4PLC software capabilities to calculate estrone-1- glucuronide concentration for each sample.

Calculation of Results:

Average the duplicate OD readings for each standard and sample.
Create a standard curve by reducing the data using the 4PLC fitting routine on the plate reader, after subtracting the mean OD's for the NSB.
The sample concentrations obtained, calculated from the %B/B0 curve, should be multiplied by the dilution factor to obtain neat sample values.
Or use the online tool from http://www.myassays.com/arbor-assays-estrone-3-glucuronide-(e1g)- eia-kit.assay to calculate the data. *The MyAssays logo is a registered trademark of MyAssays Ltd. typical data Sample Mean OD Net OD % B/B0 E1G Conc. (pg/mL) NSB 0.042 0 - - Standard 1 0.167 0.125 7.8 1,000 Standard 2 0.265 0.223 13.9 500 Standard 3 0.425 0.383 23.9 250 Standard 4 0.686 0.644 40.2 125 Standard 5 1.006 0.964 60.1 62.5 Standard 6 1.298 1.256 78.4 31.25 Standard 7 1.491 1.449 90.4 15.625 B0 1.645 1.603 100.0 0 Sample 1 0.416 0.374 23.3 258.5 Sample 2 1.184 1.142 71.2 41.8 Always run your own standard curve for calculation of results.
Do not use this data.
Conversion Factor: 100 pg/mL of E1G is equivalent to 224 pM.

Assay Precision: Three urine samples were diluted with Assay Buffer and run in replicates of 20 in an assay.
Inter Assay Precision:
Three urine samples were diluted with Assay Buffer and run in duplicates in ten assays run over multiple days by four operators.

Restrictions: For Research Use only

Handling

Preservative: Sodium azide

Precaution of Use: As with all such products, this kit should only be used by qualified personnel who have had labo- ratory safety instruction.
The complete insert should be read and understood before attempting to use the product.
The antibody coated plate needs to be stored desiccated.
The silica gel pack included in the foil ziploc bag will keep the plate dry.
The silica gel pack will turn from blue to pink if the ziploc has not been closed properly.
This kit utilizes a peroxidase-based readout system.
Buffers, including other manufacturers' Wash Buffers, containing sodium azide will inhibit color production from the enzyme.
Make sure all buffers used for samples are azide free.
Ensure that any plate washing system is rinsed well with deionized water prior to using the supplied Wash Buffer as prepared on Page 8.
The Stop Solution is acid.
The solution should not come in contact with skin or eyes.
Take appro- priate precautions when handling this reagent.

Storage: 4 °C,RT

Storage Comment: All components of this kit should be stored at 4°C until the expiration date of the kit.

References

Sattler, Bishop, Woodie, Polasek: "Characterizing estrus by trans-abdominal ultrasounds, fecal estrone-3-glucuronide, and vaginal cytology in the Steller sea lion (Eumetopias jubatus)." in: Theriogenology, Vol. 120, pp. 25-32, (2018) (PubMed).

Burgess, Hunt, Kraus, Rolland: "Get the most out of blow hormones: validation of sampling materials, field storage and extraction techniques for whale respiratory vapour samples." in: Conservation physiology, Vol. 4, Issue 1, pp. cow024, (2016) (PubMed).

Target Details

Target: Estrone-3-Glucuronide

Alternative Name: Estrone-3-Glucuronide (E1G)

Background: Estrone-3-glucuronide, C24H30O8, (1,3,5(10)-estratrien-3-ol-17-one glucosiduronate, E1G) is the principle secreted form of circulating estradiol in mammals. Ovulation is the critical event of each menstrual cycle that occurs during the reproductive life of healthy females and the ovum can only be fertilized during the short period of time in which it is viable. Spermatozoa also have a limited biological life-span and the ease with which they can ascend the female genital tract is largely dependent upon the quality of mucus secreted by the cervix, which is under hormonal control. The three phases of the menstrual cycle are: (i) an initial phase when there is only a low risk that would enable viable spermatazoa to survive and reach the ovum, (ii) a phase when the chance of fertilization is at a maximum, the fertile period, and (iii) a time of absolute infertility when the ovum is no Ionger viable1-4. Clinical studies have indicated the utility of measuring estrone-3-glucuronide (E1G) and pregnanediol-3a-glucuronide (PDG) in samples of urine to monitor ovarian function in females. OH Estrone-3-Glucuronide, E1G HO O H HO OH There is substantial evidence supports an association of endogenous reproductive hormone ex- posure with increased risk of reproductive cancers5-7. Greater estrogen exposure, assessed via in- direct indicators such as number of years spent having menstrual cycles6 or direct indicators such as hormone measures7, is associated with increased risk for cancers of the breast and ovary8,9