Human B7-H3 ELISA Kit - Quantikine

Catalog # Availability Size / Price Qty
DB7H30
PDB7H30
SB7H30
Control Products Available
Human B7-H3 ELISA Standard Curve
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Product Details
Procedure
Citations (4)
FAQs
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Human B7-H3 Quantikine ELISA Kit Summary

Assay Type
Solid Phase Sandwich ELISA
Format
96-well strip plate
Assay Length
4.5 hours
Sample Type & Volume Required Per Well
Cell Culture Supernates (50 uL), Serum (50 uL), EDTA Plasma (50 uL), Heparin Plasma (50 uL), Urine (50 uL)
Sensitivity
0.274 ng/mL
Assay Range
0.8 - 50 ng/mL (Cell Culture Supernates, Serum, EDTA Plasma, Heparin Plasma, Urine)
Specificity
Natural and recombinant human B7-H3
Cross-reactivity
< 0.5% cross-reactivity observed with available related molecules.Cross-species reactivity not tested.
Interference
No significant interference observed with available related molecules.

Product Summary

The Quantikine Human B7-H3 Immunoassay is a 4.5 hour solid-phase ELISA designed to measure human B7-H3 in cell culture supernates, serum, plasma, and urine. It contains NS0-expressed recombinant human B7-H3 and has been shown to accurately quantitate the recombinant factor. Results obtained using natural human B7-H3 showed linear curves that were parallel to the standard curves obtained using the Quantikine kit standards. These results indicate that this kit can be used to determine relative mass values for naturally occurring human B7-H3.

Recovery

The recovery of B7-H3 spiked to levels throughout the range of the assay in various matrices was evaluated.

Sample Type Average % Recovery Range %
Cell Culture Media (n=4) 105 99-112
EDTA Plasma (n=4) 104 91-115
Heparin Plasma (n=4) 102 93-114
Serum (n=4) 103 94-117

Linearity

To assess the linearity of the assay, samples containing and/or spiked with high concentrations of B7-H3 were serially diluted with Calibrator Diluent to produce samples with values within the dynamic range of the assay.
Human B7-H3 ELISA Linearity

Scientific Data

Human B7-H3 ELISA Standard Curve

Product Datasheets

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Preparation and Storage

Shipping
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: B7-H3

B7-H3 is an immunoglobulin superfamily protein that is expressed by osteoblasts, fibroblasts, ciliated respiratory epithelial cells, anterior pituitary progenitor cells, first trimester extravillous trophoblasts, and multiple tumor cells. It is induced on activated dendritic cells (DC), skeletal muscle myocytes, and monocytes. B7-H3 can both stimulate and inhibit immune cell activation. As a co-stimulator, B7-H3 augments macrophage activation and promotes proliferation and cytokine secretion by CD4+ and CD8+ T cells. As a co-inhibitor, tumor cell B7-H3 blocks the cytolytic activity of NK cells, limits cytokine production by activated T cells, and imparts an immunosuppressive phenotype to dendritic cells. B7-H3 can interact with TREML2/TLT-2 to enhance T cell activation including the CD8+ T cell-mediated lysis of tumor cells.

Long Name:
B7 Homolog 3
Entrez Gene IDs:
80381 (Human); 102657 (Mouse); 315716 (Rat); 102131295 (Cynomolgus Monkey)
Alternate Names:
B7H3; B7-H3; B7H34Ig-B7-H3; B7-H3B7 homolog 3; CD276 antigen; CD276 molecule; CD276; Costimulatory molecule
&#9888; WARNING: This product can expose you to chemicals including N,N-Dimethylforamide, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.

Assay Procedure

Refer to the product for complete assay procedure.

Bring all reagents and samples to room temperature before use. It is recommended that all samples, standards, and controls be assayed in duplicate.
  1.   Prepare all reagents, standard dilutions, and samples as directed in the product insert.
  2.   Remove excess microplate strips from the plate frame, return them to the foil pouch containing the desiccant pack, and reseal.

  3. 100 µL Assay Diluent
  4.   Add 100 µL of Assay Diluent to each well.

  5. 50 µL Standard, Control, or Sample
  6.   Add 50 µL of Standard, control, or sample to each well. Cover with a plate sealer, and incubate at room temperature for 2 hours on a horizontal orbital microplate shaker.
  7.   Aspirate each well and wash, repeating the process 3 times for a total of 4 washes.

  8. 200 µL Conjugate
  9.   Add 200 µL of Conjugate to each well. Cover with a new plate sealer, and incubate at room temperature for 2 hours on the shaker.
  10.   Aspirate and wash 4 times.

  11. 200 µL Substrate Solution
  12.   Add 200 µL Substrate Solution to each well. Incubate at room temperature for 30 minutes on the benchtop. PROTECT FROM LIGHT.

  13. 50 µL Stop Solution
  14.   Add 50 µL of Stop Solution to each well. Read at 450 nm within 30 minutes. Set wavelength correction to 540 nm or 570 nm.

Citations for Human B7-H3 Quantikine ELISA Kit

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

4 Citations: Showing 1 - 4
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  1. Camel nanobody-based B7-H3 CAR-T cells show high efficacy against large solid tumours
    Authors: Li, D;Wang, R;Liang, T;Ren, H;Park, C;Tai, CH;Ni, W;Zhou, J;Mackay, S;Edmondson, E;Khan, J;Croix, BS;Ho, M;
    Nature communications
    Species: Mouse, Human
    Sample Types: Cell Culture Supernates, Plasma
  2. B7-H3: A Useful Emerging Diagnostic Marker for Colon Cancer
    Authors: O Bostanci, P Sayin, R Kiziltan, S Algul, MA Aydin, O Kemik
    BioMed Research International, 2022-12-27;2022(0):1523338.
    Species: Human
    Sample Types: Serum
  3. Value of bile soluble B7H3 for the diagnosis of malignant biliary strictures: Results of a retrospective study
    Authors: Y Liu, C Cheng, L Bai, F Yao, S Shi, Y Zhang
    Surg Oncol, 2019-01-29;28(0):195-200.
    Species: Human
    Sample Types: Bile
  4. Soluble B7-H3 promotes the invasion and metastasis of pancreatic carcinoma cells through the TLR4/NF-?B pathway
    Authors: Chao Xie
    Sci Rep, 2016-06-08;6(0):27528.
    Species: Human
    Sample Types: Cell Culture Supernates

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