Triiodothyronine (T3) ELISA Kit

Details zu Produkt Nr. ABIN1163772, Anbieter: Anmelden zum Anzeigen
Antigen
Reaktivität
General
Alternativen
Kits mit alternativen Reaktivitäten:
31
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9
9
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8
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1
1
Methodentyp
Sandwich ELISA
Detektionsbereich
0.156-10 ng/mL
Untere Nachweisgrenze
0.156 ng/mL
Applikation
ELISA
Optionen
Hersteller
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Proben Cell Culture Supernatant, Plasma, Serum, Tissue Homogenate
Analytische Methode Quantitative
Nachweismethode Colorimetric
Spezifität General Triiodothyronine
Sensitivität 0.019 ng/mL
Produktmerkmale Triiodothyronine,T3,
Bestandteile Reagent (Quantity):
  • Assay plate (1),
  • Standard (2),
  • Sample Diluent (1×20 mL),
  • Assay Diluent A (1×10 mL),
  • Assay Diluent B (1×10 mL),
  • Detection Reagent A (1×120 μL),
  • Detection Reagent B (1×120 μL),
  • Wash Buffer(25 x concentrate) (1×30 mL),
  • Substrate (1×10 mL),
  • 2 Stop Solution (1×10 mL),
  • Plate sealer for 96 wells (5),
  • Instruction (1)
Benötigtes Material Microplate reader. Pipettes and pipette tips. EP tube Deionized or distilled water.
Antigen
Andere Bezeichnung Triiodothyronine
Hintergrund Synonyms: ,T3,Triiodothyronine
Kommentare

Gene Name: T3

Probenmenge 100 μL
Plattentyp Pre-coated
Protokoll The microtiter plate provided in this kit has been pre-coated with an antibody specific to the target. Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated polyclonal antibody preparation specific for target and Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. Then a TMB (3,3'5, 5' tetramethyl-benzidine) substrate solution is added to each well. Only those wells that contain the target, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of a sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The concentration of target in the samples is then determined by comparing the O.D. of the samples to the standard curve.
Aufbereitung der Reagenzien

Bring all reagents to room temperature before use. Wash Buffer - If crystals have formed in the concentrate, warm to room temperature and mix gently until the crystals have completely dissolved. Dilute 30 mL of Wash Buffer Concentrate into deionized or distilled water to prepare 750 mL of Wash Buffer. Standard - Reconstitute the Standard with 1.0 mL of Sample Diluent. This reconstitution produces a stock solution. Allow the standard to sit for a minimum of 15 minutes with gentle agitation prior to making serial dilutions (Making serial dilution in the wells directly is not permitted). The undiluted standard serves as the high standard. The Sample Diluent serves as the zero standard (0 ng/ml).

Probennahme Serum - Use a serum separator tube (SST) and allow samples to clot for 30 minutes before centrifugation for 15 minutes at approximately 1000 × g. Remove serum and assay immediately or aliquot and store samples at -20 °C or -80 °C.
Plasma - Collect plasma using EDTA or heparin as an anticoagulant. Centrifuge samples for 15 minutes at 1000 × g at 2 °C - 8 °C within 30 minutes of collection. Store samples at -20 °C or -80 °C. Avoid repeated freeze-thaw cycles.
Tissue homogenates - The preparation of tissue homogenates will vary depending upon tissue type. For this assay, tissue was rinsed with 1X PBS to remove excess blood, homogenized in 20 mL of 1X PBS and stored overnight at ≤ -20 °C After two freeze-thaw cycles were performed to break the cell membranes, the homogenates were centrifuged for 5 minutes at 5000 x g. Remove the supernate and assay immediately or aliquot and store at ≤ -20 °C.
Cell culture supernates and Other biological fluids - Remove particulates by centrifugation and assay immediately or aliquot and store samples at -20 °C or -80 °C. Avoid repeated freeze-thaw cycles.
Note:
1. Samples to be used within 5 days may be stored at 2-8 °C , otherwise samples must stored at -20 °C (1 month) or -80 °C (2 months) to avoid loss of bioactivity and contamination.
2. Tissue or cell extraction samples prepared by chemical lysis buffer may cause unexpected ELISA results due to the impacts of certain chemicals.
3. Influenced by the factors including cell viability, cell number and also sampling time, samples from cell culture supernatant may not be detected by the kit
4. Sample hemolysis will influence the result, so hemolytic specimen can not be detected.
5. When performing the assay slowly bring samples to room temperature.
Testdurchführung

Allow all reagents to reach room temperature (Please do not dissolve the reagents at 37 °C directly.). All the reagents should be mixed thoroughly by gently swirling before pipetting. Avoid foaming. Keep appropriate numbers of strips for 1 experiment and remove extra strips from microtiter plate. Removed strips should be resealed and stored at 4 °C until the kits expiry date. Prepare all reagents, working standards and samples as directed in the previous sections. Please predict the concentration before assaying. If values for these are not within the range of the standard curve, users must determine the optimal sample dilutions for their particular experiments.
1. Add 100 μL of Standard, Blank, or Sample per well. Cover with the Plate sealer. Incubate for 2 hours at 37 °C .
2. Remove the liquid of each well, don ’ t wash.
3. Add 100 μL of Detection Reagent A working solution to each well. Cover with the Plate sealer. Incubate for 1 hour at 37 °C . Detection Reagent A working solution may appear cloudy. Warm to room temperature and mix gently until solution appears uniform.
4. Aspirate each well and wash, repeating the process three times for a total of three washes. Wash by filling each well with Wash Buffer (approximately 400 μL) using a squirt bottle, multi-channel pipette, manifold dispenser or autowasher. Complete removal of liquid at each step is essential to good performance. After the last wash, remove any remaining Wash Buffer by aspirating or decanting. Invert the plate and blot it against clean paper towels.
5. Add 100 μL of Detection Reagent B working solution to each well. Cover with a new Plate sealer. Incubate for 1 hours at 37 °C .
6. Repeat the aspiration/wash as in step 4.
7. Add 90 μL of Substrate Solution to each well. Cover with a new Plate sealer. Incubate within 30 minutes at 37 °C . Protect from light.
8. Add 50 μL of Stop Solution to each well. If color change does not appear uniform, gently tap the plate to ensure thorough mixing.
9. Determine the optical density of each well at once, using a microplate reader set to 450 nm.
Important Note:
1. Absorbance is a function of the incubation time. Therefore, prior to starting the assay it is recommended that all reagents should be freshly prepared prior to use and all required strip-wells are secured in the microtiter frame. This will ensure equal elapsed time for each pipetting step, without interruption.
2. Please carefully reconstitute Standards or working Detection Reagent A and B according to the instruction, and avoid foaming and mix gently until the crystals have completely dissolved. The reconstituted Standards can be used only once. This assay requires pipetting of small volumes. To minimize imprecision caused by pipetting, ensure that pipettors are calibrated. It is recommended to suck more than 10 μ l for once pipetting.
3. To ensure accurate results, proper adhesion of plate sealers during incubation steps is necessary. Do not allow wells to sit uncovered for extended periods between incubation steps. Once reagents have been added to the well strips, DO NOT let the 5 strips DRY at any time during the assay.
4. For each step in the procedure, total dispensing time for addition of reagents to the assay plate should not exceed 10 minutes.
5. To avoid cross-contamination, change pipette tips between additions of each standard level, between sample additions, and between reagent additions. Also, use separate reservoirs for each reagent.
6. The wash procedure is critical. Insufficient washing will result in poor precision and falsely elevated absorbance readings.
7. Duplication of all standards and specimens, although not required, is recommended.
8. Substrate Solution is easily contaminated. Please protect it from light.

Ergebnisberechnung

Average the duplicate readings for each standard, control, and sample and subtract the average zero standard optical density. Create a standard curve by reducing the data using computer software capable of generating a four parameter logistic (4-PL) curve-fit. As an alternative, construct a standard curve by plotting the mean absorbance for each standard on the x-axis against the concentration on the y-axis and draw a best fit curve through the points on the graph. The data may be linearized by plotting the log of the SAA concentrations versus the log of the O.D. and the best fit line can be determined by regression analysis. It is recommended to use some related software to do this calculation, such as curve expert 13.0. This procedure will produce an adequate but less precise fit of the data. If samples have been diluted, the concentration read from the standard curve must be multiplied by the dilution factor.

Beschränkungen Nur für Forschungszwecke einsetzbar
Lagerung 4 °C/-20 °C
Informationen zur Lagerung The Assay Plate, Standard, Detection Reagent A and Detection Reagent B should be stored at -20°C upon being received. After receiving the kit , Substrate should be always stored at 4°C.
Produkt verwendet in: Wang, Chen, Zhou, Li, Wang, Huang, Wang, Lin, Zhou: "Bioconcentration and metabolism of BDE-209 in the presence of titanium dioxide nanoparticles and impact on the thyroid endocrine system and neuronal development in zebrafish larvae." in: Nanotoxicology, Vol. 8 Suppl 1, pp. 196-207, 2014 (PubMed).

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Liu, Li, Ha, Qi, Duan, Yang: "The PI3K/Akt and ERK pathways elevate thyroid hormone receptor ?1 and TRH receptor to decrease thyroid hormones after exposure to PCB153 and p,p'-DDE." in: Chemosphere, Vol. 118, pp. 229-38, 2014 (PubMed).

Yu, Zhao, Feng, Wen, Li, Zhang, Peng, Huo, Zhou: "Chronic exposure to pentachlorophenol alters thyroid hormones and thyroid hormone pathway mRNAs in zebrafish." in: Environmental toxicology and chemistry / SETAC, Vol. 33, Issue 1, pp. 170-6, 2013 (PubMed).

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Dierolf, Scheitza, Bonifas, Blömeke: "Cyanamide-mediated Inhibition of N-acetyltransferase 1." in: Toxicology, Vol. 302, Issue 1, pp. 1-10, 2012 (PubMed).

Miklosz, Chabowski, Zendzian-Piotrowska, Gorski: "Effects of hyperthyroidism on lipid content and composition in oxidative and glycolytic muscles in rats." in: Journal of physiology and pharmacology : an official journal of the Polish Physiological Society, Vol. 63, Issue 4, pp. 403-10, 2012 (PubMed).

Yan, Zhou, Yang, Li, Hu, Wang, Chen, Li: "Waterborne exposure to microcystin-LR alters thyroid hormone levels and gene transcription in the hypothalamic-pituitary-thyroid axis in zebrafish larvae." in: Chemosphere, Vol. 87, Issue 11, pp. 1301-7, 2012 (PubMed).

Yu, Lam, Guo, Wu, Lam, Zhou: "Parental transfer of polybrominated diphenyl ethers (PBDEs) and thyroid endocrine disruption in zebrafish." in: Environmental science & technology, Vol. 45, Issue 24, pp. 10652-9, 2011 (PubMed).

Trantham-Davidson, Neely, Lavin, Seamans: "Mechanisms underlying differential D1 versus D2 dopamine receptor regulation of inhibition in prefrontal cortex." in: The Journal of neuroscience : the official journal of the Society for Neuroscience, Vol. 24, Issue 47, pp. 10652-9, 2004 (PubMed).

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