Human B7-H6 Antibody

Catalog # Availability Size / Price Qty
MAB71444-100
MAB71444-SP
NKp30 Binding to B7-H6 Blocked by Human B7-H6 Antibody
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Human B7-H6 Antibody Summary

Species Reactivity
Human
Specificity
Detects human B7-H6 in direct ELISAs.
Source
Monoclonal Mouse IgG2B Clone # 1018457
Purification
Protein A or G purified from hybridoma culture supernatant
Immunogen
Human embryonic kidney cell HEK293-derived human B7-H6
Asp25-Ser262
Accession # Q68D85
Formulation
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Endotoxin Level
<0.10 EU per 1 μg of the antibody by the LAL method.
Label
Unconjugated

Applications

Recommended Concentration
Sample
Blockade of Receptor-ligand Interaction
In a functional ELISA, 20-120 ng/mL of Mouse Anti-Human B7-H6 Monoclonal Antibody (Catalog # MAB71444) will block 50% of the binding of 20 ng/mL of Recombinant Human NKp30 Fc Chimera Protein (Catalog # 1849-NK) to immobilized Recombinant Human B7-H6 His-tag Protein (Catalog # 9309-B7) coated at 1 μg/mL (100 µL/well). At 1 μg/mL, this antibody will block >80% of the binding.
 

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Blockade of Receptor-ligand Interaction View Larger

NKp30 Binding to B7-H6 Blocked by Human B7-H6 Antibody In a functional ELISA, 20-120 ng/mL of Mouse Anti-Human B7-H6 Monoclonal Antibody (Catalog # MAB71444) will block 50% of the binding of 20 ng/mL of Recombinant Human NKp30 Fc Chimera Protein (1849-NK) to immobilized Recombinant Human B7-H6 His-tag Protein (9309-B7) coated at 1 μg/mL (100 µL/well). At 1 μg/mL, this antibody will block >80% of the binding.

Flow Cytometry Detection of Human B7-H6 by Flow Cytometry View Larger

Detection of Human B7-H6 by Flow Cytometry B7H6 expression in human PC cell lines and generation of B7H6 KO PC cell lines. (A) Surface expression of B7H6 on human pancreatic cancer cell lines (PANC-1, CFPAC-1, Capan-1, PL45) was assessed with a Fortessa X20 flow cytometer. (B) Immunoblotting detected B7H6 protein expression in human pancreatic cancer cell lines, with K562 as a positive control. GAPDH was used as a loading control. (C) sB7H6 secreted by pancreatic cancer cells into supernatants at 24 and 48 hours was analyzed by ELISA. Medium collected from K562 or RPMI-1640 served as a positive or negative control, respectively. Data from at least 3 independent experiments are shown as mean ± SEM. (D) Immunoblotting detected the protein expression of B7H6 after what was knocked out by CRISPR/Cas9 from PANC-1 and Capan-1 cells. beta -actin was the internal control (E) Quantification of B7H6 protein expression on PANC-1 and Capan-1 cells normalized to beta -actin. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/35311080), licensed under a CC-BY license. Not internally tested by R&D Systems.

Immunohistochemistry Detection of Human B7-H6 by Immunohistochemistry View Larger

Detection of Human B7-H6 by Immunohistochemistry B7H6 expression in human pancreatic cancer tissues. (A) IHC staining of B7H6 in tumor (right) and adjacent tissues (left) of a pancreatic cancer patient’s specimens (magnification: Middle, 10×; right and left, 100×). (B) B7H6 expression in benign human organs shown by IHC staining of B7H6 (magnification: 100×). (C) Kaplan-Meier survival analysis of overall survival between PC patients who carried B7H6-positive or -negative tumors. P=0.017. (D) Kaplan-Meier analysis of overall survival between patients with high levels of B7H6 (H score ≥ 47) and those with low levels (H-score < 47). P<0.001. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/35311080), licensed under a CC-BY license. Not internally tested by R&D Systems.

Immunohistochemistry Detection of Human B7-H6 by Immunohistochemistry View Larger

Detection of Human B7-H6 by Immunohistochemistry B7H6 expression in human pancreatic cancer tissues. (A) IHC staining of B7H6 in tumor (right) and adjacent tissues (left) of a pancreatic cancer patient’s specimens (magnification: Middle, 10×; right and left, 100×). (B) B7H6 expression in benign human organs shown by IHC staining of B7H6 (magnification: 100×). (C) Kaplan-Meier survival analysis of overall survival between PC patients who carried B7H6-positive or -negative tumors. P=0.017. (D) Kaplan-Meier analysis of overall survival between patients with high levels of B7H6 (H score ≥ 47) and those with low levels (H-score < 47). P<0.001. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/35311080), licensed under a CC-BY license. Not internally tested by R&D Systems.

Western Blot Detection of Human B7-H6 by Western Blot View Larger

Detection of Human B7-H6 by Western Blot B7H6 expression in human PC cell lines and generation of B7H6 KO PC cell lines. (A) Surface expression of B7H6 on human pancreatic cancer cell lines (PANC-1, CFPAC-1, Capan-1, PL45) was assessed with a Fortessa X20 flow cytometer. (B) Immunoblotting detected B7H6 protein expression in human pancreatic cancer cell lines, with K562 as a positive control. GAPDH was used as a loading control. (C) sB7H6 secreted by pancreatic cancer cells into supernatants at 24 and 48 hours was analyzed by ELISA. Medium collected from K562 or RPMI-1640 served as a positive or negative control, respectively. Data from at least 3 independent experiments are shown as mean ± SEM. (D) Immunoblotting detected the protein expression of B7H6 after what was knocked out by CRISPR/Cas9 from PANC-1 and Capan-1 cells. beta -actin was the internal control (E) Quantification of B7H6 protein expression on PANC-1 and Capan-1 cells normalized to beta -actin. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/35311080), licensed under a CC-BY license. Not internally tested by R&D Systems.

Western Blot Detection of Human B7-H6 by Western Blot View Larger

Detection of Human B7-H6 by Western Blot B7H6 expression in human PC cell lines and generation of B7H6 KO PC cell lines. (A) Surface expression of B7H6 on human pancreatic cancer cell lines (PANC-1, CFPAC-1, Capan-1, PL45) was assessed with a Fortessa X20 flow cytometer. (B) Immunoblotting detected B7H6 protein expression in human pancreatic cancer cell lines, with K562 as a positive control. GAPDH was used as a loading control. (C) sB7H6 secreted by pancreatic cancer cells into supernatants at 24 and 48 hours was analyzed by ELISA. Medium collected from K562 or RPMI-1640 served as a positive or negative control, respectively. Data from at least 3 independent experiments are shown as mean ± SEM. (D) Immunoblotting detected the protein expression of B7H6 after what was knocked out by CRISPR/Cas9 from PANC-1 and Capan-1 cells. beta -actin was the internal control (E) Quantification of B7H6 protein expression on PANC-1 and Capan-1 cells normalized to beta -actin. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/35311080), licensed under a CC-BY license. Not internally tested by R&D Systems.

Reconstitution Calculator

Reconstitution Calculator

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Preparation and Storage

Reconstitution
Reconstitute at 0.5 mg/mL in sterile PBS.
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Shipping
Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: B7-H6

B7-H6 is a glycosylated member of the B7 family of immune co-stimulatory proteins (1  2). Mature human B7-H6 consists of a 238 amino acid (aa) extracellular domain (ECD) that contains one Ig-like V domain and one Ig-like C1 domain, a 21 aa transmembrane segment, and a 171 aa cytoplasmic domain that contains one ITIM, one SH2, and one SH3 motif (3). Both of the Ig-like domains carry N-linked glycosylation (4). Within the ECD, human B7-H6 shares 99%, 94%, and 87% aa sequence identity with chimpanzee, orangutan, and gibbon B7-H6, respectively, and 53%-56% with bovine, canine, and equine B7-H6. Orthologs in mouse and rat have not been identified. The Ig-like V domain mediates 1:1 stoichiometric binding of B7-H6 to NKp30 expressed on NK cells (4, 5). It does not show binding to NKp44, NKp46, or NKG2D (3, 6). Ligation of NKp30 by B7-H6 induces NK cell activation and target cell cytolysis (3). B7-H6 is expressed on a wide range of hematopoietic, carcinoma, and melanoma tumor cells, which is consistent with the detection of NKp30 binding sites on many tumors (3, 7). The expression of NKp30 ligands on tumor cells correlates with tumor cell sensitivity to NKp30‑dependent cell lysis (7).

References
  1. Zou, W. and L. Chen (2008) Nat. Rev. Immunol. 8:467.
  2. Bour-Jordan, H. et al. (2011) Immunol. Rev. 241:180.
  3. Brandt, C.S. et al. (2009) J. Exp. Med. 206:1495.
  4. Li, Y. et al. (2011) J. Exp. Med. 208:703.
  5. Joyce, M.G. et al. (2011) Proc. Natl. Acad. Sci. 108:6223.
  6. Arnon, T.I. et al. (2006) Semin. Cancer Biol. 16:348.
  7. Byrd, A. et al. (2007) PLoS ONE 2:e1339.
Long Name
B7 Homolog 6
Entrez Gene IDs
374383 (Human); 102121659 (Cynomolgus Monkey)
Alternate Names
B7 homolog 6; B7H6; B7-H6; DKFZp686I21167; DKFZp686O24166; NCR3LG1

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