Linearity
After serial dilution of the high-concentration combined proteins of IL-2, IL-4, IL-5, IL-6, IL-10, TNF-α, and IFN-γ using plasma, serum, and cell culture supernatant matrices respectively, the linear slopes between the actual detected values and the theoretical values are as shown in the table.
Human Th1/Th2 Cytokine Kit（Flow Cytometry Multiplex Bead Assay）
Human Th1/Th2 Cytokine Kit（Flow Cytometry Multiplex Bead Assay）
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Product Details
Product Details
Product Specification
| Antigen | IL-2、IL-4、IL-5、IL-6、IL-10、TNF-α、IFN-γ |
| Reactivity | Human |
| Stability & Storage | 12 months from date of receipt / reconstitution, 2 to 8℃ as supplied. |
Kit
| Precision | Intra-assay: <5%； Inter-assay: <10% |
| Sample type | Cell culture supernatant, Serum, Plasma |
| Assay type | Sandwich (quantitative) |
| Sensitivity | <2.0pg/ml |
| Range | 0.5pg/ml - 6000pg/ml |
| Recovery | 70% - 130% |
| Assay time | 70 minutes |
| Species reactivity | Human |
Background
The Cytometric Bead Array (CBA) technology enables the capture of soluble analytes or analyte panels using beads with known sizes and fluorescence intensities, thereby allowing the detection of analytes via flow cytometry. Each capture bead in the CBA kit is conjugated with a specific antibody. The detection reagent provided with the kit is Streptavidin-Phycoerythrin, and the intensity of the fluorescent signal generated by this reagent is proportional to the amount of bound analyte. When the capture beads and detection reagent are incubated together with the test sample containing target analytes, sandwich complexes are formed. Detection of these complexes by flow cytometry allows for the identification of particles exhibiting the fluorescence characteristics of both the beads and the detection reagent.
Picture
Picture
CBA
Standard curve
Example of IL-2,IL-4,IL-5,IL-6,IL-10,TNF-α,IFN-γstandard curve in Assay Diluent .
Intra-assay precision
Ten replicates of each of three different levels of IL-2, IL-4, IL-5, IL-6,IL-10, TNF-α, and IFN-γwere tested.
Inter-assay precision
Ten repeated tests were conducted on three different levels of IL-2, IL-4, IL-5, IL-6, IL-10, TNF-α and IFN-γ using different batches of reagents.
Recovery
Within the detection range, the combined cytokine proteins were added to different matrices at high concentrations.
The matrices used in these experiments were diluted 2-fold with the assay buffer before the addition of the cytokine proteins.
The results were compared with those of samples that had the same concentration of cytokines added in the assay buffer.
Distribution Diagram
In the figure, the R1 gate represents the selected target capture microsphere group, which is used to define this group for subsequent detection and analysis of fluorescence signals.
Distribution Diagram
The figure shows the distribution of microsphere clusters corresponding to different cytokines; it enables the simultaneous differentiation of multiple cytokines, providing a basis for the group definition for the subsequent quantitative analysis of each cytokine.
Distribution Diagram
The histogram reflects the number of particles in each microsphere group.
Specificity
The antibodies used in the kit have been screened for their specific reactivity with particular cytokines. After analyzing samples containing only a single recombinant cytokine protein, it was found that when using this detection method, there was no cross-reaction or background detection of cytokines in other capture magnetic bead groups.
Theoretical limit of detection
Repeat the detection of the blank sample 20 times using the same batch of reagents, and calculate the theoretical limit of detection.
