| 1998 |
EphB3 (HEK2) interacts via its C-terminal PDZ-binding motif with the PDZ domain of the Ras-binding protein AF6; this interaction with full-length AF6 (but not the isolated PDZ domain) depends on EphB3 kinase activity. Endogenous AF6 is phosphorylated by EphB3 and EphB2 in a ligand-dependent fashion in NIH 3T3 and NG108 cells. |
Yeast two-hybrid, mutational analysis, immunoprecipitation, in-cell phosphorylation assays |
Proceedings of the National Academy of Sciences of the United States of America |
High |
9707552
|
| 1998 |
Tyrosine-614 (Y614) is the major autophosphorylation site of EphB3 (HEK2) and functions as a multi-docking site for SH2-domain-containing proteins rasGAP (via its N-terminal SH2 domain), Crk, and Fyn; a Y614F substitution abolishes binding of all three. |
In vitro binding assays, immunoprecipitation, yeast two-hybrid, site-directed mutagenesis (Y614F) |
Oncogene |
High |
9674711
|
| 1998 |
Ephrin-B3 is a high-affinity ligand for EphB3 (Kd ~1 nM) with selectivity among the transmembrane ephrin-B family; it is expressed at the dorsal and ventral midline of the neural tube (floor plate). |
Receptor-binding affinity assays, in situ hybridization |
Oncogene |
Medium |
9484836
|
| 2002 |
Human RYK associates with EphB2 and EphB3, requiring both extracellular and cytoplasmic domains of RYK; this association is not dependent on Eph receptor activation. Unlike murine Ryk, human RYK is not phosphorylated by EphB3. |
Co-immunoprecipitation, in vitro binding assays |
The Journal of biological chemistry |
Medium |
11956217
|
| 2004 |
EphB3 kinase activity is required for inhibition of integrin-mediated cell adhesion and induction of cell rounding, but directional cell migration inhibition is kinase-independent. Both wild-type and kinase-dead EphB3 reduce Rac1 and Cdc42 activity upon ephrin-B1 stimulation, with a relative increase in RhoA signaling mediating migration inhibition. |
Stable transfection of WT vs. kinase-dead EphB3, adhesion assays, migration assays, GTPase activity assays, pharmacological inhibition, integrin-activating antibodies |
The Journal of biological chemistry |
High |
15536074
|
| 2006 |
EphB3 expressed by recruited macrophages at the optic nerve injury site supports adult retinal ganglion cell (RGC) axon re-extension and sprouting after injury; loss of EphB3 greatly decreases axon plasticity without affecting intrinsic axon growth potential. Injured RGC axons express EphrinB3 and bind recombinant EphB3 protein in vivo. |
In vivo optic nerve injury in EphB3 heterozygous and null mice, mRNA expression analysis, recombinant protein injection, in vitro axon outgrowth and turning assays |
The Journal of neuroscience |
High |
16554460
|
| 2009 |
EphB3 overexpression in HT-29 colorectal cancer cells promotes mesenchymal-to-epithelial transition (MET): reorganizes cortical actin, increases E-cadherin/ZO-1/plakoglobin, decreases fibronectin and nuclear β-catenin, inactivates CrkL-Rac1, increases Ca2+-dependent cell-cell adhesion, and suppresses tumor growth in xenografts. |
Stable transfection, morphological analysis, immunofluorescence, transwell migration, soft agar assay, xenograft, GTPase assays |
Carcinogenesis |
Medium |
19483190
|
| 2010 |
EphB3 signaling suppresses neural stem/progenitor cell (NSPC) proliferation in the subventricular zone in a p53-dependent manner. EphB3 activation by ephrinB3-Fc increases p53 expression; pharmacological inhibition or siRNA knockdown of p53 attenuates ephrinB3-Fc-mediated growth suppression. In the absence of ligand, EphB3 induces cell death. |
EphB3-/- and ephrinB3-/- knockout mice, BrdU incorporation, Ki67 immunostaining, lateral ventricle ephrinB3-Fc infusion, siRNA knockdown of p53, pharmacological p53 inhibition, cultured NSPCs |
Stem cells |
High |
20496368
|
| 2011 |
In NSCLC cells, EphB3 promotes cell growth and migration in a kinase-independent manner when overexpressed; silencing EphB3 reduces DNA synthesis, activates caspase-8-mediated apoptosis, and increases focal adhesion accumulation to suppress migration. |
Stable overexpression and siRNA knockdown in NSCLC cell lines, proliferation/migration assays, xenograft models, apoptosis assays, focal adhesion staining |
Cancer research |
Medium |
21266352
|
| 2012 |
Kinase-activated EphB3 in NSCLC assembles a ternary signaling complex comprising RACK1, PP2A, and Akt, leading to reduced Akt phosphorylation and inhibition of cell migration. RACK1 mediates assembly of this complex in response to EphB3 activation. |
Co-immunoprecipitation, forced EphB3 kinase activation, in vitro migration assay, in vivo metastasis seeding, identification of RACK1 as EphB3-binding protein |
Nature communications |
High |
22314363
|
| 2012 |
EphB2 and EphB3 forward signaling (not reverse signaling) are required for palatal mesenchyme proliferation and palate development; foetuses with cytoplasmic-truncated EphB2 (capable of reverse but not forward signaling) plus EphB3-null develop cleft palate due to reduced palatal shelf proliferation. |
Genetic epistasis using kinase-dead/truncated EphB2 knockin and EphB3-/- compound mutant mice, palatal shelf culture, BrdU proliferation assays |
Mechanisms of development |
High |
19032981
|
| 2014 |
SNAIL1 silences EPHB3 by competitively displacing the stem cell factor ASCL2 from an E-box motif in the EPHB3 promoter/enhancer, then recruiting corepressor complexes containing HDACs and the histone demethylase LSD1, collapsing active chromatin. SNAIL2, but not ZEB1, also represses EPHB3 reporter constructs. |
Reporter assays, ChIP for ASCL2/p300/TCF7L2/LSD1/HDACs, endogenous locus analysis, xenotransplant models with/without sustained EPHB3 expression |
Molecular oncology |
High |
25277775
|
| 2014 |
A transcriptional enhancer at the EPHB3 locus integrates input from ASCL2, Wnt/β-catenin, MAP kinase, and Notch signaling; low Notch activity causes enhancer decommissioning and EPHB3 silencing in colorectal carcinoma. Restoring Notch activity re-establishes enhancer function and EPHB3 expression. |
Enhancer reporter assays, ChIP, Notch pathway manipulation, gene expression analysis in cell lines and tumors |
Proceedings of the National Academy of Sciences of the United States of America |
High |
24707046
|
| 2014 |
EphB3 functions as a dependence receptor in neurons: in the absence of ephrinB3 ligand, EphB3 is cleaved by caspases and induces cell death; ephrinB3 stimulation blocks this cleavage and prevents apoptosis. Infusion of clustered ephrinB3-Fc reduces cortical infarct and cell death after controlled cortical impact injury via EphB3-dependent mechanism. |
EphB3-/- and ephrinB3-/- mice, controlled cortical impact injury, TUNEL staining, ephrinB3-Fc infusion, caspase cleavage assays |
Cell death & disease |
High |
24810043
|
| 2015 |
EphB3 mediates oligodendrocyte cell death in the injured spinal cord through a dependence receptor mechanism; ephrinB3 ligand administration promotes oligodendrocyte survival both in vivo and in vitro under pro-apoptotic conditions. Genetic ablation of EphB3 increases myelin basic protein expression and improves locomotor function after SCI. |
EphB3-/- mice, contusive spinal cord injury, oligodendrocyte survival assays, ephrinB3 ligand administration, locomotor behavioral assessment |
Cell death & disease |
High |
26469970
|
| 2016 |
TCF7L1 represses EPHB3 expression in colorectal cancer cells; loss of TCF7L1 activates EPHB3 as a CTNNB1/TCF target gene. Knockdown of EPHB3 partially restores growth and normal cell cycle progression in TCF7L1-null CRC cells. |
TCF7L1 knockdown/knockout in CRC cells, gene expression analysis, EPHB3 siRNA epistasis, xenograft tumor models, colony formation assays |
Scientific reports |
Medium |
27333864
|
| 2016 |
EphB3 stimulates migration and metastasis in papillary thyroid cancer in a kinase-dependent manner through activation of Vav2, a Rho GEF, leading to increased Rac1 activity and decreased RhoA activity. EphB3 knockdown suppresses Vav2 and reverses this GTPase balance. |
siRNA knockdown, EphB3 overexpression, ephrin-B1/B2-Fc stimulation, EphB3-Fc blocking, Rho GTPase activity assays, in vivo metastasis model |
The Journal of biological chemistry |
Medium |
27986811
|
| 2016 |
The Mule E3 ubiquitin ligase targets EphB3 for proteasomal and lysosomal degradation in the intestinal stem cell niche, controlling EphB3 protein levels and thus crypt-villus cell positioning. |
In vivo mouse genetics (Mule conditional KO), western blotting, proteasome/lysosome inhibitor treatment |
Cell stem cell |
Medium |
27184401
|
| 2016 |
EphB3 receptors in the juxtamembrane region undergo autophosphorylation in trans (not in cis), demonstrated using isoform-specific covalent inhibitors; a unique cysteine in the EphB3 hinge region (absent in other human kinases) allows covalent inhibitor targeting. Co-crystal structures confirmed covalent linkage between EphB3 and quinazoline inhibitors. |
Specific irreversible inhibitor synthesis, kinase assays, co-crystal structures, 'clickable' inhibitor for proteome-wide target engagement |
Journal of the American Chemical Society |
High |
27478969
|
| 2016 |
EphB3 signaling in the hippocampus after traumatic brain injury promotes synaptic loss and reduces d-serine levels; EphB3-/- mice show preserved long-term potentiation, improved hippocampal-dependent learning, and attenuated synapse loss and d-serine reduction compared to wild-type injured mice. |
EphB3-/- mice, controlled cortical impact injury, LTP electrophysiology, synaptic protein quantification, d-serine measurement, behavioral learning assays |
Neurobiology of disease |
Medium |
27317833
|
| 2018 |
EphB3 functions as a pro-apoptotic dependence receptor in cortical endothelial cells after TBI; in the absence of EphB3, endothelial cell survival is increased, blood-brain barrier permeability is reduced, and astrocyte-EC membrane interactions are enhanced after controlled cortical impact. |
EphB3-/- mice, CCI injury, BBB permeability assays, endothelial cell survival quantification, immunofluorescence of astrocyte-EC contacts |
Cell death & disease |
Medium |
29311672
|
| 2018 |
EphB3 suppresses glioma invasion, migration, and proliferation by downregulating the EGFR-PI3K/AKT signaling pathway; EphB3 knockdown upregulates EGFR, p-PI3K, and p-AKT, while overexpression downregulates these proteins. |
siRNA knockdown and overexpression in U87MG and U251 glioma cell lines, western blotting, invasion/migration/proliferation assays |
Brain research |
Medium |
38341169
|
| 2019 |
In cetuximab-resistant colorectal cancer, EGFR and EphB3 physically interact (co-immunoprecipitation), and this binding increases upon resistance acquisition, leading to STAT3 activation; inhibition of EphB3 decreases STAT3 activity. |
Co-immunoprecipitation, western blotting for STAT3 phosphorylation, RTK array, siRNA knockdown, cetuximab-resistant cell line model |
Theranostics |
Medium |
31149041
|
| 2020 |
EphB3 interacts with initiator caspases (caspase-8 or caspase-9) and the adaptor protein Dral/FHL-2 to mediate its cleavage and activate dependence receptor cell death in oligodendrocytes after brain injury; blocking this pathway with ephrinB3-Fc improves oligodendrocyte survival, myelin sparing, axonal conductance, and behavioral recovery in mice and conserved mechanism found in human TBI patients. |
Co-immunoprecipitation, caspase cleavage assays, EphB3-/- mice, CCI injury, ephrinB3-Fc administration, behavioral/electrophysiological readouts, human TBI tissue analysis |
Brain communications |
High |
33305261
|
| 2022 |
YTHDF2 binds to m6A sites in the 3'UTR of EPHB3 mRNA to decrease its stability and reduce EPHB3 protein levels, thereby activating the PI3K/Akt and NF-κB signaling pathways and promoting temozolomide resistance in glioblastoma. |
RNA immunoprecipitation, FISH, dual-luciferase reporter, siRNA knockdown of YTHDF2, RNA sequencing, rescue experiments with PI3K/Akt and NF-κB inhibitors |
Clinical & translational immunology |
Medium |
35582627
|
| 2024 |
EphB3 acts as a negative regulator of osteogenic differentiation in mesenchymal stromal/stem cells; absence of EphB3 signaling reduces expression of BMP pathway inhibitors, increases Bmp7 expression, increases osteoprogenitor and preosteoblast proportions, and reduces osteoclast numbers, preventing bone loss in ovariectomy and glucocorticoid-induced osteoporosis mouse models. |
EphB3-/- and EphB2-/- mice, in vitro MSC differentiation assays, qRT-PCR, histological staining, ovariectomy and dexamethasone bone loss models, bone volume/density measurement |
Journal of bone and mineral research |
Medium |
38739682
|
| 2025 |
Astrocytic EphB3 receptors regulate synaptic d-serine availability at CA3-CA1 hippocampal synapses: stimulation of EphB3 with exogenous ephrinB3 increases d-serine and NMDAR activity, while inhibition of endogenous EphB3 impairs NMDAR-dependent LTP. Astrocyte-specific knockdown of EphB3 causes hippocampal plasticity deficits and novel object recognition memory impairment that can be rescued by exogenous d-serine. |
Acute hippocampal slice electrophysiology, exogenous ephrinB3 application, EphB3 inhibition, astrocyte-specific EphB3 knockdown, d-serine measurement, LTP recording, behavioral memory testing |
Progress in neurobiology |
High |
40081519
|
| 2025 |
MHV68 gH/gL glycoprotein complex directly interacts with EphB3 (and EphA4), enabling viral entry; ectopic expression of EphB3 enables MHV68 infection of otherwise non-permissive human B cells, demonstrating EphB3 functions as an entry receptor for this gammaherpesvirus. |
Direct binding assays, ectopic EphB3 expression in non-permissive B cells, soluble decoy receptor competition, mutagenesis informed by structural predictions, neutralizing antibody adsorption |
bioRxivpreprint |
Medium |
bio_10.1101_2025.06.05.657996
|