Code | CSB-E11707h |
Size | 96T,5×96T,10×96T |
Price | Request a Quote |
Trial Size |
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Intra-assay Precision (Precision within an assay): CV%<8% | ||||||
Three samples of known concentration were tested twenty times on one plate to assess. | ||||||
Inter-assay Precision (Precision between assays): CV%<10% | ||||||
Three samples of known concentration were tested in twenty assays to assess. | ||||||
To assess the linearity of the assay, samples were spiked with high concentrations of human IL-21 in various matrices and diluted with the Sample Diluent to produce samples with values within the dynamic range of the assay. | ||||||
Sample | Serum(n=4) | |||||
1:1 | Average % | 90 | ||||
Range % | 85-96 | |||||
1:2 | Average % | 92 | ||||
Range % | 87-99 | |||||
1:4 | Average % | 87 | ||||
Range % | 84-92 | |||||
1:8 | Average % | 94 | ||||
Range % | 87-100 |
The recovery of human IL-21 spiked to levels throughout the range of the assay in various matrices was evaluated. Samples were diluted prior to assay as directed in the Sample Preparation section. | ||||||
Sample Type | Average % Recovery | Range | ||||
Serum (n=5) | 98 | 94-102 | ||||
EDTA plasma (n=4) | 101 | 85-109 | ||||
These standard curves are provided for demonstration only. A standard curve should be generated for each set of samples assayed. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Interleukin 21 is a cytokine belonging to the type I cytokine family that plays important roles in immune system regulation and hematopoiesis. Activated CD4+ T cells produce IL-21, particularly Th17 and T follicular helper cells. IL-21 signals through the IL-21 receptor complex to influence the differentiation and function of various immune cell populations including B cells, T cells, and natural killer cells. This cytokine is necessary for germinal center formation, antibody class switching, and the development of memory B cells. It serves as an important mediator of adaptive immune responses and represents a valuable research target for understanding autoimmune diseases, immunodeficiencies, and cancer immunotherapy.
The Human Interleukin 21, IL-21 ELISA Kit (CSB-E11707h) is designed for quantitative measurement of IL-21 in human serum, plasma, and tissue homogenates using a sandwich assay principle. The kit offers a detection range of 3.12 pg/mL to 200 pg/mL with a sensitivity of 0.78 pg/mL, requiring 50-100 μL sample volume per well. Researchers can complete the assay within 1-5 hours with detection at 450 nm wavelength. This provides a reliable tool for IL-21 quantification in various biological samples.
Application Examples
Note: The following application examples are drawn from a selection of publications citing this product. For additional applications, please refer to the full list of references in the "Citations" section.
This ELISA kit has been used in research examining inflammatory cytokine profiles in various disease contexts. Studies have applied the kit to measure interleukin 21 levels in serum and plasma samples, particularly in comparative analyses between patient populations and healthy control groups. The kit supports cytokine profiling research aimed at understanding immune system responses and inflammatory processes.
• Hepatitis B research: Applied in studies examining cytokine levels in chronic hepatitis B patients compared to healthy controls, contributing to broader inflammatory marker assessments
• Multi-cytokine profiling: Used as part of comprehensive cytokine panels to evaluate immune responses and inflammatory status in clinical samples
• Inflammatory biomarker studies: Applied in research measuring plasma inflammatory cytokines to assess disease-associated immune responses
• Comparative clinical studies: Used in patient versus control group analyses to investigate differences in cytokine expression patterns
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