Human ICOS ELISA Kit is a Sandwich (quantitative) ELISA kit for the measurement of Human ICOS in Human in Plasma, Cell culture supernatant, Serum samples.
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Key facts
- Detection method
- Colorimetric
- Sample types
- Plasma, Cell culture supernatant, Serum
- Assay type
- Sandwich (quantitative)
- Reactive species
- Human
- Range
- 1.229 - 300 ng/mL
- Sensitivity
- = 1.2 ng/mL
Reactivity data
| Application | Reactivity | Dilution info | Notes |
|---|---|---|---|
Application sELISA | Reactivity Reacts | Dilution info - | Notes - |
Target data
Function
Stimulatory receptor expressed in activated or antigen-experienced T-cells that plays an important role in the immune response (PubMed:9930702). Upon binding to its ligand ICOSL expressed on antigen presenting cells (APCs), delivers costimulatory signals that enhances all basic T-cell responses to a foreign antigen, namely proliferation, secretion of lymphokines including IL10, up-regulation of molecules that mediate cell-cell interaction, and effective help for antibody secretion by B-cells (PubMed:33033255). Acts also as a costimulatory receptor critical for the differentiation of T follicular regulatory cells upon immune challenges such as viral infection (PubMed:27135603). Mechanistically, potentiates TCR-induced calcium flux by augmenting PLCG1 activation and actin remodeling (By similarity). In addition, activates PI3K signaling pathways independently of calcium flux (PubMed:30523347). Essential both for efficient interaction between T and B-cells and for normal antibody responses to T-cell dependent antigens. Prevents the apoptosis of pre-activated T-cells. Plays a critical role in CD40-mediated class switching of immunoglobin isotypes (By similarity).
Alternative names
CD278, AILIM, ICOS, Inducible T-cell costimulator, Activation-inducible lymphocyte immunomediatory molecule
What's included?
Recommended products
Human ICOS ELISA Kit is a Sandwich (quantitative) ELISA kit for the measurement of Human ICOS in Human in Plasma, Cell culture supernatant, Serum samples.
Key facts
- Detection method
- Colorimetric
- Sample types
- Plasma, Cell culture supernatant, Serum
- Assay type
- Sandwich (quantitative)
- Reactive species
- Human
- Range
- 1.229 - 300 ng/mL
- Assay Platform
- Microplate
- Sensitivity
- = 1.2 ng/mL
Precision
Intra assay
| Sample | n | mean | SD | C.V. |
|---|---|---|---|---|
Sample Overall | n 0 | mean - | SD - | C.V. < 10 |
Inter assay
| Sample | n | mean | SD | C.V. |
|---|---|---|---|---|
Sample Overall | n 0 | mean - | SD - | C.V. < 12 |
Recovery
Sample specific recovery
| Sample type | Average % | Range |
|---|---|---|
Sample type Serum | Average % = 84.1 | Range 76 - 94 % |
Sample type Plasma | Average % = 81.74 | Range 77 - 86 % |
Sample type Cell culture media | Average % = 102 | Range 97 - 106 % |
Storage
- Shipped at conditions
- Blue Ice
- Appropriate short-term storage conditions
- -20°C
- Appropriate long-term storage conditions
- -20°C
- Storage information
- -20°C
Notes
Human ICOS ELISA Kit is designed for the quantitative determination of ICOS in cell culture supernatants, plasma and serum samples.
This assay employs an antibody specific for human ICOS coated on a 96-well plate. Standards and samples are pipetted into the wells and ICOS present in a sample is bound to the wells by the immobilized antibody. The wells are washed and biotinylated anti-human ICOS antibody is added. After washing away unbound biotinylated antibody, HRP-conjugated streptavidin is pipetted to the wells. The wells are again washed, a TMB substrate solution is added to the wells and color develops in proportion to the amount of ICOS bound. The Stop Solution changes the color from blue to yellow, and the intensity of the color is measured at 450 nm.
Supplementary info
- This supplementary information is collated from multiple sources and compiled automatically.
- Activity summary
Inducible T-cell costimulator (ICOS) also known as AILIM or CD278 is a member of the CD28 superfamily of proteins. ICOS is a surface receptor protein approximately 60 kDa in mass. This protein is expressed mainly on activated T cells. It does not appear on naive or resting T cells. ICOS plays an important mechanical role in the immune response as its engagement enhances the production of cytokines and supports cell-cell interactions through its binding to the ICOS ligand.
- Biological function summary
ICOS plays a critical role in the regulation of immune responses. It acts as a costimulatory signal for T cells supporting their proliferation and differentiation. ICOS helps form part of a complex involving interactions with the ICOS ligand present on antigen-presenting cells. This interaction affects the function and fate of various T cell subsets including T follicular helper cells which are important for antibody production.
- Pathways
ICOS is part of the immune signaling pathway. It associates closely with the CD28 signaling pathway enhancing T-cell activation and survival. ICOS interacts with proteins such as the ICOS ligand (ICOSL) on antigen-presenting cells which helps mediate its effects. These pathways are essential in immune system homeostasis and adaptive immune responses where dysfunction can lead to immune-related diseases.
- Associated diseases and disorders
ICOS has implications in conditions such as autoimmune diseases and cancer. Abnormal expression or function of ICOS relates to the development of autoimmune conditions like systemic lupus erythematosus (SLE) where the overactive immune response damages the body's tissues. Additionally ICOS might support tumor progression in certain types of cancers by promoting immune escape. It interacts with regulatory proteins like CTLA-4 and PD-1 in these diseases which are notably involved in immune checkpoint pathways.
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1 product image
Sandwich ELISA - Human ICOS ELISA Kit (ab267638)
This standard curve is for demonstration only. A standard curve must be run with each assay.
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Product protocols
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