Murine IL-2 ELISpot Kit



ELISA Kit Technical ManualMSDS

Murine IL-2 ELISpot Kit

Assay Genie ELISpot is a highly specific immunoassay for the analysis of IL-2 production and secretion from T-cells at a single cell level in conditions closely comparable to the in-vivo environment with minimal cell manipulation. This technique is designed to determine the frequency of IL-2 producing cells under a given stimulation and the comparison of such frequency against a specific treatment or pathological state. Utilising sandwich immuno-enzyme technology, Assay Genie ELISpot assays can detect both secreted IL-2 (qualitative analysis) and single cells that produce IL-2 (quantitative analysis). Cell secreted IL-2 is captured by coated antibodies avoiding diffusion in supernatant, protease degradation or binding on soluble membrane receptors. After cell removal, the captured IL-2 is revealed by tracer antibodies and appropriate conjugates.

Murine IL-2 ELISpot Kit - Kit Principle

A capture antibody highly specific for IL-2 is coated to the wells of a PVDF bottomed 96 well microtitre plate either during kit manufacture or in the laboratory. The plate is then blocked to minimise any non-antibody dependent unspecific binding and washed. Cell suspension and stimulant are added and the plate incubated allowing the specific antibodies to bind any IL-2 produced. Cells are then removed by washing prior to the addition of Biotinylated detection antibodies which bind to the previously captured IL-2. Enzyme conjugated streptavidin is then added binding to the detection antibodies. Following incubation and washing, substrate is then applied to the wells resulting in coloured spots which can be quantified using appropriate analysis software or manually using a microscope.

ELISpot Protocol
Figure: Schematic representation of the principle of ELISpot. 1) Treat with ethanol, coat with capture antibody. 2) Incubate cells in the presence of stimuli, cytokines, are released, which bind to capture antibodies. 3) Wash plate. Incubate with biotinylated detection antibody. 4) Wash plate. Incubate with streptavidin-alkaline phosphatase conjugated. 5)Incubate with BCIP/NBT. Precipitated product forms, results in blue/purple spots.


1.For PVDF membrane activation, add 25 µl of 35% ethanol to every well.
2.Incubate plate at room temperature (RT) for 30 seconds.
3.Empty the wells by flicking the plate over a sink & gently tapping on absorbent paper. Thoroughly wash the plate 3x with 100 µl of PBS 1X per well.
4.Add 100 µl of diluted capture antibody to every well.
5.Cover the plate and incubate at 4°C overnight.
6.Empty the wells as previous and wash the plate once with 100 µl of PBS 1X per well.
7.Add 100 µl of blocking buffer to every well.
8.Cover the plate and incubate at RT for 2 hours.
9.Empty the wells as previous and thoroughly wash once with 100 µl of PBS 1X per well.
10.Add 100 µl of sample, positive and negative controls cell suspension to appropriate wells providing the required concentration of cells and stimulant.
11.Cover the plate and incubate at 37°C in a CO2 incubator for an appropriate length of time (15-20 hours). Note: do not agitate or move the plate during this incubation.
12.Empty the wells and remove excess solution then add 100 µl of Wash Buffer to every well.
13.Incubate the plate at 4°C for 10 min.
14.Empty the wells as previous and wash the plate 3x with 100 µl of Wash Buffer.
15.Add 100 µl of diluted detection antibody to every well.
16.Cover the plate and incubate at RT for 1 hour 30 min.
17.Empty the wells as previous and wash the plate 3x with 100 µl of Wash Buffer.
18.Add 100 µl of diluted Streptavidin-conjugate to every well.
19.Cover the plate and incubate at RT following the supplier's instructions.
20.Empty the wells and wash the plate 3x with 100 µl of Wash Buffer.
21.Peel of the plate bottom and wash both sides of the membrane 3x under running distilled water, once washing complete remove any excess solution by repeated tapping on absorbent paper.
22.Add 100 µl of ready-to-use substrate buffer to every well.
23.Following the supplier's instructions, incubate the plate for 5-15 min monitoring spot formation visually throughout the incubation period to assess sufficient colour development.
24.Empty the wells and rinse both sides of the membrane 3x under running distilled water. Completely remove any excess solution by gentle repeated tapping on absorbent paper Read Spots: allow the wells to dry and then read results. The frequency of the resulting coloured spots.

Murine IL-2 ELISpot Kit - Information

Product type: ELISpot Kit
Target species: Murine
Specificity: Recognizes natural murine IL-2
Incubation: 3h after cell stimulation
Kit content: Assay Genie Pre-coated ELISpot kits include precoated PVDF plates, Detection antibody, Alkaline phosphatase conjugate, BSA, BCIP/NBT ready-to-use substrate buffer.
Synonyms: N/A
Uniprot: P04351

IL-2 - Protein Information

UniProt Protein Function:IL2: Produced by T-cells in response to antigenic or mitogenic stimulation, this protein is required for T-cell proliferation and other activities crucial to regulation of the immune response. Can stimulate B-cells, monocytes, lymphokine- activated killer cells, natural killer cells, and glioma cells. A chromosomal aberration involving IL2 is found in a form of T-cell acute lymphoblastic leukemia (T-ALL). Translocation t(4;16)(q26;p13) with involves TNFRSF17. Belongs to the IL-2 family.
UniProt Protein Details:

Protein type:Secreted, signal peptide; Secreted; Oncoprotein; Cytokine

Cellular Component: cytosol; extracellular region; extracellular space

Molecular Function:carbohydrate binding; cytokine activity; glycosphingolipid binding; growth factor activity; interleukin-2 receptor binding; kappa-type opioid receptor binding

Biological Process: adaptive immune response; elevation of cytosolic calcium ion concentration; G-protein coupled receptor protein signaling pathway; immune response; immune system process; negative regulation of B cell apoptosis; negative regulation of heart contraction; negative regulation of inflammatory response; negative regulation of lymphocyte proliferation; negative regulation of protein amino acid phosphorylation; positive regulation of activated T cell proliferation; positive regulation of B cell proliferation; positive regulation of immunoglobulin secretion; positive regulation of interferon-gamma production; positive regulation of interleukin-17 production; positive regulation of isotype switching to IgG isotypes; positive regulation of protein amino acid phosphorylation; positive regulation of regulatory T cell differentiation; positive regulation of T cell differentiation; positive regulation of T cell proliferation; positive regulation of transcription from RNA polymerase II promoter; positive regulation of tyrosine phosphorylation of Stat5 protein; protein kinase C activation; regulation of T cell homeostatic proliferation; response to ethanol

UniProt Code:P04351
NCBI GenInfo Identifier:124326
NCBI Gene ID:16183
NCBI Accession:P04351.1
UniProt Secondary Accession:P04351,P97945, Q791T3,
UniProt Related Accession:P04351
Molecular Weight:19,400 Da
NCBI Full Name:Interleukin-2
NCBI Synonym Full Names:interleukin 2
NCBI Official Symbol:Il2Â Â
NCBI Official Synonym Symbols:Il-2Â Â
NCBI Protein Information:interleukin-2
UniProt Protein Name:Interleukin-2
UniProt Synonym Protein Names:T-cell growth factor; TCGF
Protein Family:Interleukin
UniProt Gene Name:Il2Â Â
UniProt Entry Name:IL2_MOUSE
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