Interferon gamma ELISA Kit

Catalog No. ABIN1980105

Product Details Interferon gamma ELISA Kit

Target: Interferon gamma (IFNG)

Reactivity: Pig

Detection Method: Colorimetric

Method Type: Sandwich ELISA

Detection Range: 0.5-150 ng/mL

Minimum Detection Limit: 0.5 ng/mL

Application: ELISA

Purpose: Porcine (pig) IFN-gamma ELISA Kit for cell culture supernatants, EDTA and/or Citrate treated plasma, and serum samples. Heparin is not recommended as an anticoagulant for use in this assay.

Sample Type: Plasma, Cell Culture Supernatant, Serum

Analytical Method: Quantitative

Specificity: The sandwich ELISA antibody pair detects Porcine IFN-gamma.

Sensitivity: 500 pg/mL

Characteristics:

• Strip plates and additional reagents allow for use in multiple experiments
• Quantitative protein detection
• Establishes normal range
• The best products for confirmation of antibody array data

Components:

• Pre-Coated 96-well Strip Microplate
• Wash Buffer
• Stop Solution
• Assay Diluent(s)
• Lyophilized Standard
• Biotinylated Detection Antibody
• Streptavidin-Conjugated HRP
• TMB One-Step Substrate

Material not included:

• Distilled or deionized water
• Precision pipettes to deliver 2 μL to 1 μL volumes
• Adjustable 1-25 μL pipettes for reagent preparation
• 100 μL and 1 liter graduated cylinders
• Tubes to prepare standard and sample dilutions
• Absorbent paper
• Microplate reader capable of measuring absorbance at 450nm
• Log-log graph paper or computer and software for ELISA data analysis

Application Details

Application Notes: Recommended Dilution for serum and plasma samples2 fold

Sample Volume: 100 μL

Plate: Pre-coated

Protocol:

1. Prepare all reagents, samples and standards as instructed in the manual.
2. Add 100 μL of standard or sample to each well.
3. Incubate 2.5 h at RT or O/N at 4 °C.
4. Add 100 μL of prepared biotin antibody to each well.
5. Incubate 1 h at RT.
6. Add 100 μL of prepared Streptavidin solution to each well.
7. Incubate 45 min at RT.
8. Add 100 μL of TMB One-Step Substrate Reagent to each well.
9. Incubate 30 min at RT.
10. Add 50 μL of Stop Solution to each well.
11. Read at 450 nm immediately.

Reagent Preparation:

1. Bring all reagents and samples to room temperature (18 - 25 °C) before use.
   2. Sample dilution: Assay Diluent C (Item L) should be used for dilution of serum/plasma samples. 1x Assay Diluent B (Item E) should be used for dilution of cell culture supernates. Suggested dilution for normal serum/plasma: 2 fold. Please note that levels of the target protein may vary between different specimens. Optimal dilution factors for each sample must be determined by the investigator.
   3. Assay Diluent B should be diluted 5-fold with deionized or distilled water before use.
   4. Preparation of standard: Briefly spin the vial of Item C and then add 800 µL Assay Diluent C (for serum/plasma samples) or 1x Assay Diluent B (for cell culture supernates) into Item C vial to prepare a 150 ng/mL standard. Dissolve the powder thoroughly by a gentle mix. Pipette 300 µL Assay Diluent C or 1x Assay Diluent B into each tube. Use the 150 ng/mL standard solution to produce a dilution series . Mix each tube thoroughly before the next transfer. Assay Diluent C or 1x Assay Diluent B serves as the zero standard (0 ng/mL). The 150 ng/mL standard in Assay Diluent B may be saturated, we recommend to start from 60 ng/mL for Assay Diluent B Standard curve. Standard, Item C vial + 800 200 µL 200 µL 200 µL 200 µL 200 µL 200myl 150 60 24 9.6 3.84 1.54 0.62 0 ng/mL ng/mL ng/mL ng/mL ng/mL ng/mL ng/mL ng/mL
   5. If the Wash Concentrate (20x) (Item B) contains visible crystals, warm to room temperature and mix gently until dissolved. Dilute 20 ml of Wash Buffer Concentrate into deionized or distilled water to yield 400 ml of 1x Wash Buffer.
   6. Briefly spin the Detection Antibody vial (Item F) before use. Add 100 µL of 1x Assay Diluent B into the vial to prepare a detection antibody concentrate. Pipette up and down to mix gently (the concentrate can be stored at 4 °C for 5 days). The detection antibody concentrate should be diluted 80-fold with 1x Assay Diluent B and used in step 4 of Part VI Assay Procedure.
   7. Briefly spin the HRP-Streptavidin concentrate vial (Item G) and pipette up and down to mix gently before use. HRP-Streptavidin concentrate should be diluted 360-fold with 1x Assay Diluent B. For example: Briefly spin the vial (Item G) and pipette up and down to mix gently . Add 25 µL of HRP-Streptavidin concentrate into a tube with 9 ml 1x Assay Diluent B to prepare a 360-fold diluted HRP- Streptavidin solution (don't store the diluted solution for next day use). Mix well.

Assay Procedure:

1. Bring all reagents and samples to room temperature (18 - 25 °C) before use. It is recommended that all standards and samples be run at least in duplicate.
   2. Add 100 µL of each standard (see Reagent Preparation step 2) and sample into appropriate wells. Cover well and incubate for 2.5 hours at room temperature or over night at 4 °C with gentle shaking.
   3. Discard the solution and wash 4 times with 1x Wash Solution. Wash by filling each well with Wash Buffer (300 myl) using a multi-channel Pipette 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.
   4. Add 100 µL of 1x prepared biotinylated antibody (Reagent Preparation step 6) to each well. Incubate for 1 hour at room temperature with gentle shaking.
   5. Discard the solution. Repeat the wash as in step
   6. Add 100 µL of prepared Streptavidin solution (see Reagent Preparation step 7) to each well. Incubate for 45 minutes at room temperature with gentle shaking.
   7. Discard the solution. Repeat the wash as in step
   8. Add 100 µL of TMB One-Step Substrate Reagent (Item H) to each well. Incubate for 30 minutes at room temperature in the dark with gentle shaking.
   9. Add 50 µL of Stop Solution (Item I) to each well. Read at 450 nm immediately.

Calculation of Results:

Calculate the mean absorbance for each set of duplicate standards, controls and samples, and subtract the average zero standard optical density. Plot the standard curve on log-log graph paper or using Sigma plot software, with standard concentration on the x-axis and absorbance on the y-axis. Draw the best-fit straight line through the standard points.
Typical Data: These standard curves are for demonstration only. A standard curve must be run with each assay. Assay Diluent B Porcine IFN-gamma concentration (ng/mL) 0.1 1 10 100 O D =4 50 n m 0.01 0.1 1 10 Assay Diluent C Porcine IFN-gamma concentration (ng/mL) 0.1 1 10 100 O D =4 50 n m 0.01 0.1 1 10
Sensitivity: The minimum detectable dose of IFN-gamma is typically less than 0.5 ng/mL.
Recovery: Recovery was determined by spiking various levels of porcine IFN-gamma into porcine serum, plasma and cell culture media. Mean recoveries are as follows: Sample Type Average % Recovery Range ( %) Serum 106.7 95-114 Plasma 88.19 79-97 Cell culture media 86.23 77-94
Linearity: Sample Type Serum Plasma Cell Culture Media 1:2 Average % of Expected 131.2 128.5 126.6 Range ( %) 122-140 118-137 119-134 1:4 Average % of Expected 127.2 74.93 96.05 Range ( %) 118-136 67-82 72-120
Reproducibility: Intra-Assay: CV<10 % Inter-Assay: CV<12 %

Assay Precision: Intra-Assay: CV< 10 % Inter-Assay: CV< 12 %

Restrictions: For Research Use only

Handling

Handling Advice: Avoid repeated freeze-thaw cycles.

Storage: -20 °C

Storage Comment: The entire kit may be stored at -20°C for up to 1 year from the date of shipment. Avoid repeated freeze-thaw cycles. The kit may be stored at 4°C for up to 6 months. For extended storage, it is recommended to store at -80°C.

Expiry Date: 6 months

References for Interferon gamma ELISA Kit (ABIN1980105)

Emaminia, Lapar, Zhao, Steidle, Harris, Laubach, Linden, Kron, Lau: "Adenosine A₂A agonist improves lung function during ex vivo lung perfusion." in: The Annals of thoracic surgery, Vol. 92, Issue 5, pp. 1840-6, (2011) (PubMed).

Target Details for Interferon gamma

Target: Interferon gamma (IFNG)

Alternative Name: IFN-gamma (IFNG Products)

Synonyms: IFG ELISA Kit, IFI ELISA Kit, IFN-g ELISA Kit, Ifg ELISA Kit, IFNG2 ELISA Kit, IFN-gamma ELISA Kit, IFN-G ELISA Kit, IFNG ELISA Kit, IFNgamma ELISA Kit, TCRalpha ELISA Kit, INF-G ELISA Kit, ifng ELISA Kit, interferon gamma ELISA Kit, interferon, gamma 1-2 ELISA Kit, IFNG ELISA Kit, Ifng ELISA Kit, ifng1-2 ELISA Kit

Background: Interferon gamma (IFN-gamma)

Gene ID: 396991

UniProt: P17803

Pathways: Interferon-gamma Pathway, 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, ER-Nucleus Signaling, Regulation of Carbohydrate Metabolic Process, Protein targeting to Nucleus, Autophagy