TNF alpha Kit ELISA

N° du produit ABIN612786

Détail du produit TNF alpha Kit ELISA

Antigène: TNF alpha (Tumor Necrosis Factor alpha (TNF alpha))

Reactivité: Humain

Méthode de détection: Colorimetric

Type de méthode: Sandwich ELISA

Seuil minimal de détection: 10 pg/mL

Application: ELISA

Fonction: The AssayMax Human TNF-alpha ELISA kit is designed for detection of TNF-alpha in human plasma, serum or cell culture supernatants

Marque: AssayMax

Type d'échantillon: Plasma, Cell Culture Supernatant

Analytical Method: Quantitative

Specificité: This assay recognizes both natural and recombinant human TNF-alpha.

Ingrédients: TNF-alpha Microplate: A 96-well polystyrene microplate (12 strips of 8 wells) coated with a murine monoclonal antibody against TNF-alpha. Sealing Tapes: Each kit contains 3 pre-cut, pressure-sensitive sealing tapes that can be cut to fit the format of the individual assay. TNF-alpha Standard: Human TNF-alpha in a buffered protein base (2 ng, lyophilized). Biotinylated TNF-alpha Antibody (100x): A 100-fold concentrated biotinylated polyclonal antibody against TNF-alpha (80µl). 1 MIx Diluent Concentrate (10x): A 10-fold concentrated buffered protein base (30 ml). Wash Buffer Concentrate (20x): A 20-fold concentrated buffered surfactant (30 ml). Streptavidin-Peroxidase Conjugate (SP Conjugate): A 100-fold concentrate (90µl). Chromogen Substrate: A ready-to-use stabilized peroxidase chromogen substrate tetramethylbenzidine (8 ml). Stop Solution: A 0.5 N hydrochloric acid to stop the chromogen substrate reaction (12 ml).

Matériel non inclus: Microplate reader capable of measuring absorbance at 450 nm. Pipettes (1-20 µL, 20-200 µL, and multiple channel). Deionized or distilled reagent grade water.

Information d'application

Volume d'échantillon: 50 μL

Durée du test: < 5 h

Plaque: Pre-coated

Protocole: This assay employs a quantitative sandwich enzyme immunoassay technique that measures TNF-alpha in less than 5 hours. A murine monoclonal antibody specific for human TNF-alpha has been pre-coated onto a microplate. TNF-alpha in standards and samples is sandwiched by the immobilized antibody and a biotinylated polyclonal antibody specific for human TNF-alpha, which is recognized by a streptavidin-peroxidase conjugate. All unbound material is then washed away and a peroxidase enzyme substrate is added. The color development is stopped and the intensity of the color is measured.

Préparation des réactifs:

Freshly dilute all reagents and bring all reagents to room temperature before use. If crystals have formed in the concentrate, mix gently until the crystals have completely dissolved. MIx Diluent Concentrate (10x): Dilute the MIx Diluent Concentrate 1:10 with reagent grade water. Store for up to 1 month at 2-8°C. Standard Curve: Reconstitute the 2 ng of human TNF-alpha Standard with 2 ml of MIx Diluent to generate a 1 ng/ml of solution. Allow the standard to sit for 10 minutes with gentle agitation prior to making dilutions. Prepare triplicate standard points by serially diluting the TNF-alpha standard solution with equal volume MIx Diluent to produce 0.5, 0.25, 0.125, 0.0625, 0.0313, and 0.0156 ng/ml. MIx Diluent serves as the zero standard (0 ng/ml). Any remaining solution should be frozen at -20°C. Standard Point Dilution [TNF-alpha] (ng/ml) P1 Standard (1 ng/ml) 1.0000 P2 1 part P1 + 1 part MIx Diluent 0.5000 P3 1 part P2 + 1 part MIx Diluent 0.2500 P4 1 part P3 + 1 part MIx Diluent 0.1250 P5 1 part P4 + 1 part MIx Diluent 0.0625 P6 1 part P5 + 1 part MIx Diluent 0.0313 P7 1 part P6 + 1 part MIx Diluent 0.0156 P8 MIx Diluent 0.0000 Biotinylated TNF-alpha Antibody (100x): Spin down the antibody briefly and dilute the desired amount of the antibody 1:100 with MIx Diluent. Any remaining solution should be frozen at -20°C. Wash Buffer Concentrate (20x): Dilute the Wash Buffer Concentrate 1:20 with reagent grade water. SP Conjugate (100x): Spin down the SP Conjugate briefly and dilute the desired amount of the conjugate 1:100 with MIx Diluent. Any remaining solution should be frozen at -20°C.

Prélèvement de l'échantillon: Plasma: Collect plasma using one-tenth volume of 0.1 M sodium citrate as an anticoagulant. Centrifuge samples at 2000 x g for 10 minutes and assay. Dilute samples 1:2 with MIx Diluent. Store the remaining samples at -20°C or below. Avoid repeated freeze-thaw cycles. (EDTA or Heparin can also be used as anticoagulant.) Serum: Samples should be collected into a serum separator tube. After clot formation, centrifuge samples at 2000 x g for 10 minutes. Dilute samples 1:2 into MIx Diluent and assay. The undiluted samples can be stored at -20°C or below for up to 3 months. Avoid repeated freeze-thaw cycles. Cell Culture Supernatants: Centrifuge cell culture media at 2000 x g for 10 minutes to remove debris. Collect supernatants and assay. The samples can be stored at -20°C or below. Avoid repeated freeze-thaw cycles.

Procédure de l'essai:

Prepare all reagents, working standards and samples as instructed. Bring all reagents to room temperature before use. The assay is performed at room temperature (20 - 30 °C). Remove excess microplate strips from the plate frame and return them immediately to the foil pouch with desiccant inside. Reseal the pouch securely to minimize exposure to water vapor and store in a vacuum desiccator. Add 50 µL of Standard or sample per well. Cover wells and incubate for two hours. Start the timer after the last sample addition. Wash five times with 200 µL of Wash Buffer. Invert the plate and decant the contents, and hit it 4-5 times on absorbent paper towel to complete remove liquid at each step. Add 50 µL of Biotinylated TNF-alpha Antibody to each well and incubate for two hours. Wash five times with 200 µL of Wash Buffer as above. Add 50 µL of Streptavidin-Peroxidase Conjugate per well and incubate for 30 minutes. Turn on the microplate reader and set up the program in advance. Wash five times with 200 µL of Wash Buffer as above. Add 50 µL of Chromogen Substrate per well and incubate for approximately 12 minutes or till the optimal blue color density develops. Gently tap the plate to ensure thorough mixing and break the bubbles in the well with pipette tip. Add 50 µL of Stop Solution to each well. The color will change from blue to yellow. Read the absorbance on a microplate reader at a wavelength of 450 nm immediately. Please note that some unstable black particles may be generated at high concentration points after stopping the reaction for about 10 minutes, which will reduce the readings. 3

Calcul des résultats:

Calculate the mean value of the duplicate or triplicate readings for each standard and sample. To generate a Standard Curve, plot the graph using the standard concentrations on the x-axis and the corresponding mean 450 nm absorbance on the y-axis. The best-fit line can be determined by regression analysis using log-log or four-parameter logistic curve-fit. Determine the unknown sample concentration from the Standard Curve and multiply the value by the dilution factor. Standard Curve The curve is provided for illustration only. A standard curve should be generated each time the assay is performed.

Précision du teste: Intra-assay and inter-assay coefficients of variation were 5.5% and 7.0% respectively.

Restrictions: For Research Use only

Stockage

Conseil sur la manipulation: The kit should not be used beyond the expiration date.

Stock: 4 °C/-20 °C

Stockage commentaire: Store kit at 2-8°C or -20°C up to the expiration date. Opened MIx Diluent may be stored for up to 1 month at 2-8°C. Store reconstituted reagents at -20°C or below. Opened unused strip wells may return to the foil pouch with the desiccant pack, reseal along with zip-seal. May be stored for up to 1 month in a vacuum desiccator.

Références pour TNF alpha Kit ELISA (ABIN612786)

Erturk, Tastekin, Serilmez, Bilgin, Bozbey, Vatansever: "Clinical significance of serum interleukin-29, interleukin-32, and tumor necrosis factor alpha levels in patients with gastric cancer." dans: Tumour biology, (2015) (PubMed).

Ragab, Safan, Obeid, Sherief: "Lipoprotein-associated phospholipase A2 (Lp-PLA2) and tumor necrosis factor-alpha (TNF-α) and their relation to premature atherosclerosis in β-thalassemia children." dans: Hematology (Amsterdam, Netherlands), Vol. 20, Issue 4, pp. 228-38, (2015) (PubMed).

Bircan, Inal, Ozcelik, Koc, Demirag, Moray, Kemik: "LigaSure® versus Clamp Tie Technique for Thyroid Surgery; Decreased Operative Time versus Increased Inflammatory Effect: a prospective randomized study." dans: European review for medical and pharmacological sciences, Vol. 18, Issue 14, pp. 1997-2005, (2014) (PubMed).

Niyazoglu, Baykara, Koc, Aydoğdu, Onaran, Dellal, Tasan, Sultuybek: "Association of PARP-1, NF-κB, NF-κBIA and IL-6, IL-1β and TNF-α with Graves Disease and Graves Ophthalmopathy." dans: Gene, Vol. 547, Issue 2, pp. 226-32, (2014) (PubMed).

Détail du antigène

Antigène: TNF alpha (Tumor Necrosis Factor alpha (TNF alpha))

Autre désignation: Tumor Necrosis Factor alpha (TNF-alpha) (TNF alpha Produits)

Synonymes: DIF Kit ELISA, TNF-alpha Kit ELISA, TNFA Kit ELISA, TNFSF2 Kit ELISA, RATTNF Kit ELISA, Tnfa Kit ELISA, tnf Kit ELISA, TNF-a Kit ELISA, TNFalpha Kit ELISA, Tnfsf1a Kit ELISA, TNFa Kit ELISA, cTNF Kit ELISA, Tnf-alpha Kit ELISA, tnfa-like Kit ELISA, TNF-ALPHA Kit ELISA, dif Kit ELISA, tnfa Kit ELISA, xtnf Kit ELISA, tnfsf2 Kit ELISA, tnf-alpha Kit ELISA, Cachectin Kit ELISA, tumor necrosis factor Kit ELISA, tumor necrosis factor b (TNF superfamily, member 2) Kit ELISA, tumor necrosis factor alpha Kit ELISA, tumor necrosis factor a (TNF superfamily, member 2) Kit ELISA, TNF Kit ELISA, Tnf Kit ELISA, tnf Kit ELISA, tnfb Kit ELISA, tnf-alpha Kit ELISA, LOC103694380 Kit ELISA, tnfa Kit ELISA

Sujet: Tumor necrosis factor alpha (TNF-alpha) is a potent cytokine with a myriad of innate immune anti-tumor properties. TNF-alpha has a critical role in the bone and cartilage damage associated with rheumatoid arthritis (RA)[1]. TNF-alpha may be involved in the pathogenesis and/or progression of gestational diabetes mellitus (GDM) [2]. TNF-alpha is expressed in myocardium during compensated pressure-overload hypertrophy and contributes to postischemic myocardial dysfunction [3]. The serum levels of TNF-alpha were also significantly elevated in active WG (Wegener's granulomatosis) [4], in the late stages of HIV-associated disease [5], and in the spinal cord of arthritic patients [6].

Pathways: Signalisation NF-kappaB, Apoptose, Caspase Cascade in Apoptosis, Signalisation TLR, Cellular Response to Molecule of Bacterial Origin, Regulation of Leukocyte Mediated Immunity, Positive Regulation of Immune Effector Process, Production of Molecular Mediator of Immune Response, Positive Regulation of Endopeptidase Activity, Hepatitis C, Protein targeting to Nucleus, Inflammasome