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Human IL3RA / CD123 ELISA Pair Set

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Materials provided
Capture Ab:0.35 mg/mL of mouse anti-IL3RA monoclonal antibody. Dilute to a working concentration of 2 μg/mL in CBS before coating.
Detection Ab:0.5 mg/mL rabbit anti-IL3RA monoclonal antibody conjugated to horseradish-peroxidase (HRP). Dilute to working concentration of 1 μg/mL in detection antibody dilution buffer before use.
Standard:Each vial contains 65 ng of recombinant IL3RA. Reconstitute with 1 mL detection antibody dilution buffer. After reconstitution, store at -20℃ to -80℃ in a manual defrost freezer. A seven-point standard curve usi ng 2-fold serial dilutions in sample dilution buffer, and a high standard of 2 ng/mL is recommended.
Sensitivity
The minimum detectable dose of Human IL3RA / CD123 was determined to be approximately 31.25 pg/ml. This is defined as at least three times standard deviations above the mean optical density of 10 replicates of the zero standard.
Principle of the product
The human IL3RA / CD123 ELISA Pair Set is for the quantitative determinationof human IL3RA / CD123.
This ELISA Pair Set contains the basic components required for the development of sandwich ELISAs.
The Sino Biological ELISA Pair Set is a solid phase sandwich ELISA (Enzyme-Linked Immunosorbent Assay). It utilizes a monoclonal antibody specific for IL3RA / CD123 coated on a 96-well plate. Standards and samples are added to the wells,and any IL3RA / CD123 present binds to the immobilized antibody. The wells arewashed and a horseradish peroxidase conjugated rabbit anti-IL3RA / CD123 monoclonal antibody is then added, producing an antibody-antigen-antibody "sandwich". The wells are again washed and TMB substrate solution is loaded, which produces color in proportion to the amount of IL3RA / CD123 present in the sample. To end the enzyme reaction, the stop solution is added and absorbances of themicrowell are read at 450 nm.
Storage
Capture Antibody: Aliquot and store at -20℃ to -80℃ for up to 6 months from date of receipt. Avoid repeated freeze-thaw cycles.
Detection Antibody: Protect it from prolonged exposure to light. Aliquot and store at -20℃ to -80℃ and for up to 6 months from date of receipt. Avoid repeated freeze-thaw cycles.
Standard: Store lyophilized Standard at -20℃ to -80℃ for up to 6 months from date of receipt. Aliquot and store the reconstituted Standard at -80℃ for up to 1 month. Avoid repeated freeze-thaw cycles.
Background

Interleukin-3 receptor subunit alpha, also known as IL-3 receptor subunit alpha, IL-3R-alpha, CD123, and IL3RA, is a single-pass type I membrane protein which belongs to the type I cytokine receptor family and Type 5 subfamily. The specific alpha subunit of the interleukin-3 receptor (IL-3Ralpha, CD123) is strongly expressed in various leukemic blasts and leukemic stem cells and seems to be an excellent target for the therapy of leukemias. The WSXWS motif of IL3RA appears to be necessary for proper protein folding and thereby efficient intracellular transport and cell-surface receptor binding. The box one motif of IL3RA is required for JAK interaction and / or activation. IL3RA represents a unique marker for primitive leukemic stem cells. Targeting of IL3RA may be a promising strategy for the preferential ablation of AML cells. Aberrant IL3RA expression is a good marker for monitoring of minimal residual disease. IL3RA is strongly expressed in various leukemic blasts and leukemic stem cells and seems to be an excellent target for the therapy of leukemias. Recent studies have shown that interleukin-3 receptor alpha (CD123) is highly expressed on leukemia stem cells of patients with acute myeloid leukemia, and is correlated with tumor load and poor prognosis. CD123 was highly expressed in the bone marrow of the patients with myelodysplastic syndrome (MDS), significantly correlated with the proportion of bone marrow blasts, and thus might be the marker of MDS malignant clone. IL3RA is also a useful new marker for distinguishing B-cell disorders with circulating villous lymphocytes as its expression is characteristic of typical hairy cell leukemia (HCL) with high sensitivity and specificity.

References
  • Del Giudice I, et al. (2004) The diagnostic value of CD123 in B-cell disorders with hairy or villous lymphocytes. Haematologica. 89(3): 303-8.
  • Du X, et al. (2007) New immunotoxins targeting CD123, a stem cell antigen on acute myeloid leukemia cells. J Immunother. 30(6): 607-13.
  • Yue LZ, et al. (2010) Expression of CD123 and CD114 on the bone marrow cells of patients with myelodysplastic syndrome. Chin Med J (Engl). 123(15): 2034-2037.
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    Catalog:SEK10518-5
    List Price: $350.00  (Save $0.00)
    Price:$350.00      [How to order]
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    • Human IL3RA / CD123 ELISA standard curve
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