| 2009 |
B7-H6 (NCR3LG1) is a tumor cell surface ligand that directly binds the activating NK cell receptor NKp30, triggering NKp30-mediated NK cell cytotoxicity and cytokine secretion. B7-H6 was not detected in normal human tissues but was expressed on human tumor cells. |
Protein identification, binding assays, NK cell activation assays |
The Journal of experimental medicine |
High |
19528259
|
| 2011 |
Crystal structure of the NKp30–B7-H6 complex was determined. NKp30 uses both front and back β-sheets of its Ig-like domain to engage B7-H6 via the side and face of the β-sandwich; B7-H6 contacts NKp30 through CDR-like loops of its V-like domain in an antibody-like interaction distinct from CTLA-4–B7 and PD-1–PD-L inhibitory complexes. |
X-ray crystallography of NKp30–B7-H6 complex |
The Journal of experimental medicine |
High |
21422170
|
| 2014 |
Tumor cell shedding of B7-H6 ectodomain is mediated by the cell surface metalloproteases ADAM10 and ADAM17. Pharmacologic inhibition or siRNA knockdown of ADAM10/ADAM17 increased membrane B7-H6 levels and enhanced NKp30-mediated NK cell activation; soluble B7-H6 was elevated in sera of melanoma patients. |
Pharmacologic inhibitors of ADAMs, siRNA-mediated gene attenuation, flow cytometry, NK cell activation assays, patient serum ELISA |
Cancer research |
High |
24780758
|
| 2013 |
B7-H6 expression is induced on the surface of CD14+CD16+ proinflammatory monocytes and neutrophils upon TLR ligand stimulation or proinflammatory cytokines (IL-1β, TNF-α). A soluble form of B7-H6 is also produced by activated monocytes and neutrophils and is associated with membrane vesicles co-sedimenting with the exosomal fraction. |
In vitro stimulation assays, flow cytometry, fractionation/centrifugation of extracellular vesicles, in vivo patient cohort analysis |
Blood |
High |
23687088
|
| 2013 |
B7-H6 mRNA and surface protein expression in tumor cells is downregulated by pan- or class I HDAC inhibitors (HDACi), and by siRNA-mediated knockdown of HDAC2 or HDAC3. This downregulation is associated with decreased B7-H6 reporter activity and reduced histone acetylation at the B7-H6 promoter, leading to impaired NKp30-dependent NK cell effector functions. |
Monoclonal antibody generation, siRNA knockdown of HDAC2/3, luciferase reporter assay, chromatin immunoprecipitation (ChIP), flow cytometry, NK functional assays |
Blood |
High |
23801635
|
| 2015 |
Chronic engagement of NKp30 by soluble B7-H6 or tumor cell surface B7-H6 induces downregulation of NKp30 expression on NK cells, impairing NK cell IFN-γ production and cytolytic function against B7-H6-expressing target cells in ovarian carcinoma patients. |
Flow cytometry of tumor-associated NK cells from peritoneal fluids, in vitro functional assays with NK cells against B7-H6+ targets |
Oncoimmunology |
Medium |
26137398
|
| 2015 |
Soluble B7-H6 in serum of high-risk neuroblastoma patients inhibits NK cell functions in vitro, and its serum concentration correlates with downregulation of NKp30 on circulating NK cells. NB cells expressing B7-H6 stimulate NK cells in an NKp30-dependent manner. |
In vitro NK cell functional assays with patient serum, flow cytometry, patient cohort analysis |
Science translational medicine |
Medium |
25877893
|
| 2015 |
Standard tumor therapeutics including chemotherapy (cisplatin, 5-FU), radiation, non-lethal heat shock, and TNF-α upregulate B7-H6 expression on tumor cells, enhancing their susceptibility to NK cell lysis. B7-H6 shRNA knockdown dampened this sensitization, establishing B7-H6 as the mediator of therapy-induced NK sensitivity. |
Drug/radiation treatment of tumor cell lines, shRNA knockdown, NK cell cytotoxicity assays, flow cytometry |
The Journal of biological chemistry |
Medium |
26472927
|
| 2016 |
The proto-oncogene c-Myc and N-Myc directly drive B7-H6 expression by binding a functional site in the B7-H6 promoter. Pharmacological inhibition or siRNA/shRNA-mediated knockdown of c-Myc or N-Myc significantly decreased B7-H6 expression in melanoma, pancreatic carcinoma, and neuroblastoma cell lines, and impaired NKp30-mediated NK cell degranulation. |
Luciferase reporter assays, chromatin immunoprecipitation (ChIP), siRNA/shRNA knockdown, pharmacologic Myc inhibition, NK cell degranulation assays |
Oncoimmunology |
High |
27622013
|
| 2016 |
Crystal structure of anti-B7-H6 antibody 17B1.3 in complex with B7-H6 ectodomain (2.5 Å) revealed that 17B1.3 binds a site on B7-H6 completely distinct from the NKp30-binding site. Structure-based mutations designed to disrupt potential B7-H6 dimerization through this site did not diminish NKp30-mediated cell activation, indicating that the antibody inhibits NK cell activation by sterically interfering with cell-cell contact rather than blocking the NKp30–B7-H6 interaction. |
X-ray crystallography (2.5 Å), site-directed mutagenesis, NK cell activation assays |
Journal of molecular biology |
High |
27663271
|
| 2017 |
Human cytomegalovirus (HCMV) upregulates B7-H6 expression upon infection, but the viral genes US18 and US20 counteract this by targeting B7-H6 for endosomal degradation, thereby reducing B7-H6 surface expression to evade NK cell recognition via NKp30. |
HCMV infection of cells, viral gene expression/deletion, flow cytometry, endosomal degradation pathway analysis |
Scientific reports |
Medium |
28819195
|
| 2019 |
B7-H6 is expressed on the surface of HIV-2-infected CD4+ T cells, and chronic engagement of NKp30 by this surface B7-H6 induces downregulation of NKp30 on NK cells, impairing cytolytic function while maintaining IFN-γ overproduction, constituting a novel HIV-2 immune escape mechanism. |
Flow cytometry of NK cell phenotype and ligand expression in patient cohorts, functional NK cell assays against B7-H6+ target cells |
AIDS |
Medium |
30325780
|
| 2020 |
B7-H6 promotes NHL cell proliferation, migration, and invasion via the Ras/MEK/ERK signaling pathway. B7-H6 knockdown reduced phosphorylation of Ras/MEK/ERK components, and the MEK inhibitor AZD8330 partially reversed proliferation and completely reversed migration/invasion induced by B7-H6 overexpression. |
siRNA/shRNA knockdown, quantitative phosphoproteomics, Western blot, B7-H6 overexpression, MEK inhibitor treatment, in vivo xenograft model, CCK-8 and Transwell assays |
OncoTargets and therapy |
Medium |
32606790
|
| 2021 |
Soluble B7-H6 inhibits NK cell-mediated target cell killing and is associated with diminished cell surface expression of NKG2D and NCRs (NKp30, NKp40, NKp46). B7-H6 is only marginally released in association with extracellular vesicles (EVs), and EVs from B7-H6-expressing cells do not stimulate NK cell-mediated killing. |
Recombinant protein production in HEK293 cells, NK cell killing assays, flow cytometry, nano flow cytometry (NanoFCM) of EVs, ultracentrifugation fractionation |
International journal of molecular sciences |
Medium |
33671836
|
| 2021 |
BRD4 acts as an epigenetic activator of B7-H6 transcription in AML cells. Histone acetylation mediated by CBP30/P300 facilitates BRD4 binding to the B7-H6 promoter, which recruits P-TEFb elongation factor to phosphorylate RNA polymerase II and activate B7-H6 transcription. BRD4 also co-binds with JMJD6 at a distal enhancer of the B7-H6 gene. Metformin modifies acetylation at the B7-H6 promoter, impairing BRD4 binding. |
BRD4 inhibition, ChIP, reporter assays, siRNA knockdown, metformin treatment, Western blot, flow cytometry, apoptosis assays |
Oncoimmunology |
High |
33796404
|
| 2021 |
All-trans retinoic acid (atRA) induces leukemia cell resistance to NK cell cytotoxicity by downregulating B7-H6 expression via reduction of c-Myc, which in turn inhibits B7-H6 transcription. DNA methylation and HDAC inhibitors could not restore B7-H6 mRNA, indicating epigenetic modifications are not responsible; the effect was specifically dependent on c-Myc signaling. |
CRISPR/Cas9 B7-H6 knockout, siRNA c-Myc knockdown, real-time PCR, flow cytometry, Western blotting, NK cell cytotoxicity assays |
Cancer communications |
Medium |
34236140
|
| 2023 |
B7-H6 contains 6 functional N-linked glycosylation sites. N43 and N208 glycosylation are conserved in jawed vertebrates and are essential for NK cell activation by B7-H6. Mechanistically, N208 glycosylation contributes to membrane stability and prevents B7-H6 shedding, while N43 glycosylation is required for B7-H6/NKp30 binding affinity. |
PNGase F digestion, tunicamycin blockade, single-site mutagenesis, SDS-PAGE, flow cytometry, NK cell activation assays, phylogenetic and structural analysis |
Frontiers in immunology |
High |
38035117
|
| 2025 |
SNRPA promotes HCC cell proliferation and lenvatinib resistance via B7-H6 by facilitating B7-H6 pre-mRNA maturation: SNRPA binds B7-H6 pre-mRNA directly and contributes to its intron 2 splicing. B7-H6 in turn activates STAT3/AKT signaling, promoting G1-S cell cycle transition and inhibiting apoptosis. |
Nanopore full-length cDNA sequencing, RNA-binding protein immunoprecipitation (RIP-seq), exon-exon/exon-intron junction PCR, siRNA/overexpression gain/loss-of-function, Western blot, flow cytometry, in vivo xenograft model |
Bioscience trends |
Medium |
40240166
|
| 2025 |
G-CSF derived from gastric cancer tumor microenvironment induces B7-H6 expression on tumor-infiltrating neutrophils via NF-κB signaling pathway activation. Blockade of B7-H6 on neutrophils promotes their apoptosis and shortens their lifespan. |
Flow cytometry, in vitro neutrophil stimulation with recombinant G-CSF and tumor supernatants, NF-κB pathway inhibition, apoptosis assays |
Neoplasia |
Medium |
40054066
|
| 2024 |
CRISPR knockout of B7-H6 in CD4+ T cells reduced NK cell responses to HIV-1-infected cells in some donors, establishing that B7-H6 on HIV-infected cells contributes to NKp30-mediated NK recognition of HIV-infected cells. |
CRISPR editing of CD4+ T cells to knockout B7-H6, NK cell activation/response assays, ligand expression profiling by flow cytometry |
bioRxiv (preprint)preprint |
Medium |
bio_10.1101_2024.06.24.600449
|
| 2015 |
NKp30-B7-H6 interaction in HBV-related acute-on-chronic liver failure (ACLF) triggers NK cell upregulation of IL-32, which in turn induces apoptosis of hepatocytes (Huh7 cells) in a dose-dependent manner. In vitro NK-92 cells killed high-B7-H6-expressing Huh7 and B7-H6-transfected LO2 hepatocytes in an NKp30/B7-H6-dependent manner. |
Co-culture assays, CCK8 cytotoxicity assay, anti-NKp30 antibody stimulation, Annexin V/PI apoptosis assay, flow cytometry, immunochemistry in patient samples |
PloS one |
Medium |
26241657
|
| 2020 |
B7-H6 is preferentially expressed in glioma stem-like cells (GSLCs) compared to parental glioma cell lines. Knockdown of B7-H6 by siRNA in GSLCs inhibited cell proliferation with decreased c-Myc expression and inactivation of PI3K/Akt and ERK/MAPK signaling pathways. RNMT (RNA guanine-7 methyltransferase) was identified as a downstream target co-expressed with B7-H6 and c-Myc; RNMT expression was inhibited upon B7-H6 knockdown. CRISPR-Cas9 knockout of B7-H6 in 293T cells also suppressed proliferation. |
siRNA knockdown, CRISPR-Cas9 knockout, Western blot, TCGA co-expression analysis, flow cytometry, proliferation assays |
Journal of immunology research |
Medium |
32322592
|
| 2018 |
B7-H6 knockdown in glioma cell lines (HepG2 and SMMC-7721) decreased expression of C-myc, C-fos, and Cyclin-D1, and was accompanied by reduced cell proliferation, migration, invasion, and G1 cell cycle arrest, indicating B7-H6 regulates these oncogenic factors intracellularly. |
RNA interference (siRNA), CCK-8 proliferation assay, migration/invasion assays, Western blot, flow cytometry cell cycle analysis |
Cancer cell international |
Low |
30186042
|
| 2018 |
Lipopolysaccharide (LPS) induces B7-H6 expression in glioma cell lines. B7-H6 knockdown increased E-cadherin and Bax expression while decreasing vimentin, N-cadherin, MMP-2, MMP-9, and survivin, suggesting B7-H6 promotes EMT and invasion-related signaling. |
LPS stimulation, siRNA knockdown, Western blot, cell viability/migration/invasion assays |
International immunopharmacology |
Low |
29679856
|
| 2023 |
B7-H6 promotes migration and invasion of medulloblastoma (Daoy) cells by activating c-MYC, which in turn enhances F-actin cytoskeleton rearrangement and upregulates MMP-2 and MMP-9 expression. |
siRNA knockdown, plasmid overexpression, Transwell migration/invasion assays, Western blot, immunofluorescence staining of F-actin |
Medical oncology |
Low |
36692844
|