| 2009 |
Jagged1 antagonizes DLL4-Notch signaling in endothelial cells expressing Fringe family glycosyltransferases; glycosylation of Notch enhances DLL4-Notch signaling whereas Jagged1 has weak signaling capacity and competes with DLL4, establishing opposing roles for the two ligands in angiogenesis. |
Genetic mouse models, in vivo angiogenesis assays, functional studies with Fringe glycosyltransferases |
Cell |
High |
19524514
|
| 2006 |
Neutralizing DLL4 with a selective antibody renders endothelial cells hyperproliferative and causes defective cell fate specification/differentiation, demonstrating that DLL4-mediated Notch signaling regulates endothelial cell proliferation and differentiation and is crucial during active vascularization. |
Anti-DLL4 neutralizing antibody treatment, in vitro and in vivo endothelial cell assays, tumor models |
Nature |
High |
17183323
|
| 2007 |
DLL4 expression is dynamically induced by VEGF in the retinal vasculature and acts as a negative feedback regulator to prevent overexuberant angiogenic sprouting; pharmacological inhibition of DLL4/Notch signaling (via soluble DLL4-Fc or blocking antibody) produces enhanced sprouting and increased endothelial proliferation. |
Intraocular administration of soluble DLL4-Fc and blocking antibody; Dll4 haploinsufficiency mouse model; postnatal retinal vascular analysis |
Proceedings of the National Academy of Sciences of the United States of America |
High |
17296940
|
| 2003 |
VEGF, but not bFGF, induces DLL4 and Notch1 gene expression in human arterial endothelial cells via VEGFR1 and VEGFR2 through a PI3K/Akt pathway, independently of MAPK and Src; constitutive Notch activation stabilizes endothelial network formation. |
Gene expression analysis, pharmacological inhibitors of PI3K/Akt, MAPK, and Src; 3D angiogenesis model; Matrigel network formation assay |
Molecular and cellular biology |
High |
12482957
|
| 2011 |
Simultaneous genetic inactivation of Dll1 and Dll4 in mouse intestinal epithelium causes complete conversion of proliferating progenitors into postmitotic goblet cells with loss of intestinal stem cells, establishing that DLL1 and DLL4 together are the physiological Notch ligands required for intestinal stem cell maintenance. |
Inducible gut-specific gene targeting (Vil-Cre-ERT2) in mice; single and double conditional knockouts; lineage analysis with Notch1 reporter |
Gastroenterology |
High |
21238454
|
| 2017 |
Genetic experiments in postnatal mice reveal that the level of active Notch signaling (not direct DLL4-mediated cell-cell communication per se) is the key determinant of vessel growth; Notch activation directs tip-derived endothelial cells into developing arteries, coupling sprouting angiogenesis with artery formation. Endothelial VEGF-A and CXCR4 expression are key processes controlling Notch-dependent vessel growth. |
Endothelial-specific genetic targeting of Dll4 in tip cells in postnatal mice; conditional knockout models; retinal vascular analysis |
Nature cell biology |
High |
28714968
|
| 2010 |
Endothelial-specific stabilization of Wnt/β-catenin signaling upregulates Dll4 transcription and strongly increases Notch signaling in the endothelium, linking Wnt and Notch signaling pathways in vascular development and arteriovenous specification. |
Endothelial-specific β-catenin gain-of-function mouse models; in vitro β-catenin activation; chromatin/transcriptional analysis of Dll4 promoter |
Developmental cell |
High |
20627076
|
| 2008 |
Foxc1 and Foxc2 transcription factors directly activate the Dll4 promoter and the Notch target Hey2 promoter via Foxc binding elements; Foxc2 physically interacts with a Notch transcriptional activation complex (Su(H)/NICD) to induce Hey2 promoter activity; VEGF-activated PI3K and ERK pathways modulate Foxc transcriptional activity in Dll4 and Hey2 induction. |
Promoter reporter assays, co-immunoprecipitation, siRNA knockdown, VEGF stimulation with PI3K/ERK inhibitors in endothelial cells |
PloS one |
High |
18545664
|
| 2013 |
Arterial Dll4 expression is regulated combinatorially by Notch signaling (via RBPJ/NICD direct binding) and SoxF transcription factors (Sox7, Sox18) through two arterial-specific enhancers; combinatorial loss of both SoxF and RBPJ binding ablates all Dll4 enhancer activity and results in loss of arterial markers and dorsal aorta. |
Arterial-specific enhancer characterization in mouse and zebrafish; transgenic reporter assays; combined Sox7/Sox18/Rbpj knockdown; endogenous dll4 expression analysis |
Proceedings of the National Academy of Sciences of the United States of America |
High |
23818617
|
| 2006 |
Hypoxia induces DLL4 expression through HIF-1α, which leads to activation of Notch target genes Hey1 and Hey2; in endothelial progenitor cells, hypoxia-mediated upregulation of DLL4 and Hey2 represses COUP-TFII (a venous identity regulator), promoting arterial cell fate; Hey factors create a negative feedback on HIF-1α-induced gene expression. |
Promoter analysis, HIF-1α overexpression/knockdown, endothelial progenitor cell culture under hypoxia, reporter assays |
Experimental cell research |
Medium |
17045587
|
| 2012 |
The microRNA-30 family directly targets the DLL4 3'UTR to repress DLL4 expression; miR-30b overexpression in endothelial cells increases vessel number/length in sprouting assays; microinjection of miR-30 mimics in zebrafish suppresses dll4 and causes excessive intersegmental vessel sprouting; target protector against the miR-30 site in dll4 3'UTR upregulates dll4. |
miRNA target site mutagenesis/target protector, overexpression in endothelial cells, zebrafish microinjection, sprouting angiogenesis assay |
Blood |
High |
23086751
|
| 2015 |
DLL4 expression in intestinal lacteals requires VEGFR3 and VEGFR2 activation; genetic inactivation of Dll4 specifically in lymphatic endothelial cells leads to lacteal regression and impaired dietary fat uptake, establishing DLL4 as a regulator of adult lymphatic vessel maintenance and intestinal fat absorption. |
Lymphatic endothelial cell-specific Dll4 conditional knockout mice; VEGFR inhibition; dietary fat uptake assays; histological analysis |
The Journal of clinical investigation |
High |
26529256
|
| 2015 |
DLL4 is expressed on bone marrow osteocalcin-positive (Ocn+) mesenchymal cells; selective depletion of DLL4 from these cells recapitulates thymopoietic abnormality (reduced thymus-seeding progenitors and T cell generation), establishing that bone marrow DLL4 drives thymus-seeding progenitor generation. |
In vivo deletion of DLL4 from Ocn+ cells; conditional cell-specific knockouts; progenitor frequency analysis; thymic function assays |
The Journal of experimental medicine |
High |
25918341
|
| 2011 |
Notch1-Dll4 signaling regulates postnatal lymphatic development; antibody blockade of Notch1 and Dll4 results in defective lymphatic sprouting associated with downregulation of EphrinB2 (which mediates VEGFR3/VEGFC signaling), dilation of collecting lymphatics with reduced mural cell coverage, and impaired wound-associated lymphangiogenesis. |
Function-blocking antibodies against Notch1 and Dll4 in mice; EphrinB2 expression analysis; wound healing lymphangiogenesis model |
Blood |
High |
21700774
|
| 2009 |
DLL4 expression in endothelial cells of the tumor microenvironment activates Notch3 signaling in co-cultured T-ALL tumor cells, promoting their escape from dormancy; neutralization of DLL4 greatly reduces EC-mediated Notch3 activation in T-ALL cells and blocks tumorigenesis. |
EC-tumor cell co-culture, angiogenic factor stimulation, DLL4 neutralization, Notch3 silencing by RNAi, in vivo tumorigenicity assays |
Cancer research |
Medium |
19208840
|
| 2011 |
Adhesion of endothelial cells to laminin-111 via α2β1 and α6β1 integrins triggers DLL4 expression and subsequent Notch pathway activation; VEGF stimulates laminin γ1 deposition which leads to integrin signaling and DLL4 induction; loss of α2 or α6 integrins mimics Dll4 silencing and induces excessive network branching. |
siRNA knockdown of integrins and DLL4, laminin adhesion assays, 3D sprouting angiogenesis assay, signaling pathway analysis |
Circulation research |
Medium |
21474814
|
| 2009 |
DLL4 is inducible on dendritic cells by TLR activation (not by early inflammatory cytokines IL-1/IL-18); DLL4 on DCs promotes IL-17-producing T cell generation via upregulation of Rorc expression; both Rorc and Il17 gene promoters are direct transcriptional Notch targets. |
In vitro DC-T cell co-culture with TLR ligands; Notch inhibition; Rorc and Il17 promoter analysis; cytokine measurements |
Journal of immunology |
Medium |
19494260
|
| 2012 |
KSHV vGPCR upregulates DLL4 through an ERK-dependent mechanism in lymphatic endothelial cells; DLL4-stimulated Notch4 signaling suppresses cell cycle genes in neighboring lymphatic endothelial cells, inducing cellular quiescence. |
KSHV gene expression studies, ERK inhibition, NF-κB inhibition, gene expression profiling, functional Notch signaling assay |
PLoS pathogens |
Medium |
19816565
|
| 2012 |
LRF (leukemia/lymphoma related factor) acts as an erythroid-specific repressor of Dll4 expression; Lrf deletion in erythroblasts upregulates Dll4, sensitizing HSCs to T-cell instructive Notch signals in the bone marrow, leading to premature lymphoid differentiation and loss of HSC maintenance. |
In vivo mouse models with erythroblast-specific Lrf deletion; functional HSC assays; Dll4 expression analysis in erythroblasts |
Blood |
High |
23134786
|
| 2012 |
Dll4-Notch signaling between DN1 T cell progenitors and thymic DCs regulates thymic DC development and regulatory T cell homeostasis; pharmacological Dll4 blockade converts DN1 progenitors to immature DCs, which then expand Treg cells via a DC-dependent, MHC-II-dependent mechanism independent of Flt3. |
Anti-Dll4 antibody blockade; genetic inactivation models; thymectomy experiments; flow cytometry; DC-T cell co-culture |
The Journal of experimental medicine |
High |
22547652
|
| 2015 |
Cerebral cavernous malformation protein CCM1 controls DLL4-Notch3 signaling between endothelial cells and pericytes; CCM1 silencing in endothelial cells decreases DLL4 levels, reducing Notch3 activity in co-cultured pericytes; DLL4 stimulates Notch3 on brain pericytes, inducing expression of PDGFRB2, N-Cadherin, HBEGF, TGFB1, NG2, and S1P, enhancing pericyte adhesion and antiangiogenic function. |
siRNA knockdown of CCM1 in endothelial cells; EC-pericyte co-culture; Notch3 reporter assays; transgenic Ccm1/Ccm2 endothelial knockout mouse models |
Stroke |
Medium |
25791711
|
| 2016 |
Dll4 fluctuations in individual endothelial cells drive sprout branching through heterogeneous phase patterns; pathologically high VEGF or DLL4 overexpression leads to Notch-dependent synchronization of Dll4 fluctuations within endothelial clusters, switching vessels from branching to expansion mode. |
Live imaging of Dll4 expression in mouse retina in vivo and embryonic stem cell-derived sprouting assays; DLL4 overexpression; Notch inhibition |
eLife |
High |
27074663
|
| 2018 |
The multiple PDZ domain protein MPDZ physically interacts with the intracellular C-terminus of DLL4 (and DLL1) and enables their interaction with the adherens junction protein Nectin-2; MPDZ inactivation leads to impaired DLL4-induced Notch signaling activity and increased blood vessel sprouting. |
Co-immunoprecipitation of MPDZ with DLL4 and Nectin-2; MPDZ gene inactivation in endothelial cells; Notch signaling reporter assays; embryonic mouse hindbrain vascular analysis |
eLife |
High |
29620522
|
| 2019 |
LPA4 and LPA6 receptors activate YAP/TAZ through Gα12/Gα13-Rho-ROCK signaling in endothelial cells; YAP/TAZ knockdown increases β-catenin- and NICD-mediated DLL4 expression; the LPA4/LPA6-Gα12/Gα13-YAP/TAZ axis thereby represses endothelial DLL4 expression to promote sprouting angiogenesis. |
Endothelial-specific Lpa4;Lpa6 double KO mice; siRNA knockdown of signaling components; fibrin gel sprouting assay; Notch inhibitor rescue |
The Journal of clinical investigation |
High |
31335323
|
| 2019 |
High glucose activates a DLL4-Notch1 positive feedback loop in keratinocytes; Notch1 inactivation specifically in keratinocytes cancels the repressive effects of this loop on wound healing in diabetes, demonstrating that keratinocyte-specific Dll4-Notch1 signaling impairs diabetic wound healing. |
Loss-of-function genetic approaches (keratinocyte-specific Notch1 knockout); diabetic mouse wound healing models; pharmacological Notch inhibition |
Proceedings of the National Academy of Sciences of the United States of America |
High |
30886104
|
| 2019 |
Indoxyl sulfate induces DLL4 protein upregulation in macrophages (partly through inhibition of the ubiquitin-proteasome pathway via the deubiquitinating enzyme USP5); DLL4 then activates Notch signaling to drive proinflammatory macrophage polarization; the uptake pathway is mediated by OATP2B1 transporter; macrophage-specific DLL4 knockout inhibits atherosclerosis in Ldlr-/- mice. |
Global proteomics; siRNA knockdown via macrophage-targeted lipid nanoparticles; macrophage-specific DLL4 KO; atherosclerosis mouse model; Dll4 antibody treatment |
Circulation |
High |
30586693
|
| 2020 |
Dll4 acts as a negative regulator of intra-aortic hematopoietic cluster (IAHC) formation by impairing the recruitment of surrounding hemogenic cells into existing clusters; blocking Dll4 promotes entry of new hemogenic Gfi1+ cells into IAHCs and increases HSC numbers. |
Live imaging of organotypic slice cultures; clonal analysis; mathematical modeling; Dll4 blocking experiments |
The EMBO journal |
High |
32149421
|
| 2022 |
In skeletal muscle atrophy (disuse or diabetes), microvascular endothelium upregulates and releases DLL4, which activates muscular Notch2 without direct cell-cell contact; inhibition of the Dll4-Notch2 axis prevents muscle atrophy and promotes overloading-induced hypertrophy in mice. |
Mouse models of disuse and diabetic atrophy; Dll4-Notch2 axis inhibition; endothelial Dll4 overexpression; muscle mass/signaling analysis |
Nature metabolism |
High |
35228746
|
| 2015 |
DLL4 is expressed on a sub-population of bipotent hematoendothelial progenitors (HEPs) in hESCs; DLL4-high HEPs are enriched in endothelial potential while DLL4-low/-negative HEPs are committed to hematopoietic lineage; DLL4 stimulation enhances hematopoietic differentiation of HEPs and increases clonogenic hematopoietic progenitor output. |
hESC differentiation; clonal analysis; transcriptome profiling; confocal imaging of embryoid bodies; DLL4 stimulation assays |
Leukemia |
Medium |
25778099
|
| 2015 |
DLL4 only is an efficient cis-inhibitor of Notch signaling whereas DLL1 has minimal cis-inhibitory activity; this differential cis-inhibition property contributes to functional divergence of DLL1 and DLL4 in tissue-specific contexts, explaining why transgenic DLL4 cannot replace DLL1 during somitogenesis. |
Conditional overexpression from Hprt locus; knock-in of Dll4 into Dll1 locus (Dll1Dll4ki); in vitro cis/trans Notch activation assays |
PLoS genetics |
High |
26114479
|
| 2018 |
TLR4 signaling in lung endothelial cells activates ERK phosphorylation, which causes ERK-dependent phosphorylation of FOXC2 and its transcriptional activation of the DLL4 gene; FOXC2-siRNA or ERK inhibition attenuates LPS-induced DLL4 expression and aberrant angiogenic sprouting both in vitro and in vivo. |
LPS stimulation of endothelial cells; pharmacological ERK inhibition; FOXC2 siRNA; ERK-2 dominant negative; FOXC2 ChIP at DLL4 promoter; neonatal mouse retinal angiogenesis model |
The Journal of physiology |
Medium |
29380370
|
| 2020 |
RHOQ is induced by DLL4/Notch signaling and is essential for NICD nuclear translocation; in the absence of RHOQ, Notch1 is targeted for degradation in the autophagy pathway and NICD is sequestered from the nucleus and degraded in lysosomes, establishing a feed-forward mechanism. |
RHOQ siRNA knockdown; RHOQ overexpression; Notch signaling reporter assays; in vitro sprouting assay; zebrafish in vivo vascular analysis; subcellular localization studies |
Angiogenesis |
Medium |
32506201
|
| 2014 |
Fibulin-3 activates ADAM10/17 in endothelial cells by inhibiting TIMP3, resulting in increased Notch cleavage and increased DLL4 expression independently of VEGF signaling; DLL4 knockdown reduces fibulin-3-dependent proangiogenic effects in vitro. |
ADAM10/17 inhibition; DLL4 siRNA knockdown; TIMP3 inhibition; endothelial cell motility and tubule formation assays; glioma xenograft models |
Cancer research |
Medium |
25139440
|
| 2019 |
DLL4 in coronary arterial development functions within a Dll4-Jag1-EphrinB2 signaling cascade; Dll4 inactivation stimulates excessive capillary growth from sinus venosus, while forced Dll4 expression or Mfng overexpression blocks coronary plexus remodeling and arterial differentiation; EphrinB2 is a critical downstream effector of Dll4 in arterial morphogenesis. |
Endocardial-specific Jag1 and Dll4 conditional knockout mice; forced Dll4/Mfng expression; angiogenic rescue in ventricular explants and primary human ECs |
eLife |
High |
31789590
|
| 2021 |
In zebrafish valvulogenesis, blood flow-induced shear stress activates Notch signaling in endocardial cells via Dll4-mediated lateral inhibition, singling out Dll4-positive endocardial cells that ingress into the cardiac jelly in response to Wnt9a (produced through Erk5-Klf2-Wnt9a cascade); these parallel mechanosensitive pathways produce binary luminal/abluminal cell fate decisions. |
Zebrafish genetic models; live imaging; Notch/Wnt9a pathway manipulation; endocardial cell fate analysis |
Cell reports |
Medium |
34610316
|
| 2021 |
Pre-existing embryonic coronary plexus at the inner myocardium undergoes DLL4-NOTCH1 signaling-dependent angiogenic expansion to vascularize the expanding neonatal myocardium and to revascularize the regenerating neonatal heart. |
Lineage-tracing experiments; gain- and loss-of-function of Dll4-Notch1 in mice; live vascular imaging |
Nature cell biology |
High |
34497373
|
| 2019 |
Soluble DLL4 activates Notch signaling in endothelial cells, increasing VE-cadherin at intercellular junctions and reducing vascular permeability through a cAMP/PKA-dependent pathway; PKA inhibition reverses DLL4-mediated barrier enhancement both in vitro and in vivo. |
Recombinant sDll4 treatment of EC monolayers; FITC-albumin permeability assay; γ-secretase inhibitor; PKA inhibition (H89); in vivo rat mesenteric microvessel hydraulic conductivity |
American journal of physiology. Heart and circulatory physiology |
Medium |
30681366
|
| 2019 |
TMZ treatment promotes nuclear translocation of MMP14 followed by extracellular release of DLL4; secreted DLL4 stimulates cleavage of Notch3, its nuclear translocation, and induction of GBM stemness and sphere formation. |
MMP14 expression and localization analysis after TMZ treatment in PDX GBM models; Kiloplex ELISA-based protein array; DLL4 functional and mechanistic studies; sphering capacity assays |
International journal of cancer |
Medium |
31443114
|
| 2023 |
Epsin1 modulates the sorting of DLL4 into tubular epithelial cell-derived exosomes under high-glucose conditions; exosomal DLL4 is captured by macrophages and promotes M1 macrophage activation via Notch1 (N1ICD) activation; Epsin1 knockdown in TECs reduces exosomal DLL4 and inhibits macrophage Notch1 activation. |
Mass spectrometry of urine exosomes; siRNA knockdown of Epsin1; TEC-macrophage co-culture with exosomes; in vivo mouse diabetic nephropathy model |
Molecular therapy |
Medium |
37016580
|
| 2022 |
DLL4 binds human and murine Notch receptors; affinity-matured DLL4 variant (DeltaMAX) has 500- to 1,000-fold increased receptor-binding affinity; DeltaMAX acts as agonist in plate/bead-bound format and as antagonist (soluble decoy) in reporter and neuronal differentiation assays, demonstrating dose/format-dependent agonist/antagonist activity. |
In vitro binding affinity assays; Notch reporter assays; neuronal differentiation assays; T cell stimulation assays; directed evolution/affinity maturation |
Nature chemical biology |
High |
36050494
|
| 2024 |
Palmitic acid induces macrophage DLL4 expression, which triggers senescence in vascular smooth muscle cells (reducing collagen synthesis/deposition); macrophage-specific DLL4 knockout in atherosclerotic mice reduces plaque burden and improves plaque stability. |
Human cohort correlation; macrophage-specific DLL4 conditional KO in atherosclerotic mouse models; vascular smooth muscle cell senescence assays |
Nature communications |
High |
38346959
|
| 2015 |
Heterozygous loss-of-function mutations (nonsense and missense, including cysteine-altering variants) in DLL4 cause autosomal-dominant Adams-Oliver syndrome, establishing DLL4 as an essential Notch ligand for vascular development in humans. |
Targeted resequencing of DLL4 in 89 AOS families; whole-exome/genome sequencing; candidate gene approach based on known DLL4 function |
American journal of human genetics |
Medium |
26299364
|
| 2018 |
DLL4 signaling via Notch1 impairs M2 macrophage differentiation and induces caspase3/7-dependent apoptosis selectively during M2 (but not M1) macrophage polarization; DLL4 upregulates pro-apoptotic effectors Bax, Bak, Bid, and Bim; fully differentiated M2 macrophages become resistant to DLL4 action. |
Human monocyte differentiation in vitro with immobilized recombinant DLL4; flow cytometry; qPCR; western blot for apoptotic pathway components; Notch inhibitors |
Cell communication and signaling |
Medium |
29321062
|
| 2016 |
Endothelial DLL4 induces macrophage polarization into a proinflammatory M1 fate and elicits IL-6 production; both DLL4 and IL-6 are Notch-dependent and required for macrophage polarization; DLL4 upregulates M1-type markers and downregulates M2-type markers via Notch signaling in cardiac transplant rejection. |
EC/monocyte co-culture; endomyocardial biopsy analysis; flow cytometry; Notch signaling analysis |
Biochemical pharmacology |
Medium |
26826491
|
| 2020 |
Slug (SNAI2) suppresses Dll4-Notch signaling in endothelial cells to promote VEGFR2 expression; EC-specific Slug re-expression or loss of Dll4 rescues retinal angiogenesis in SlugKO mice; endothelial Slug is activated by SDF1α via CXCR4-ERK5 signaling. |
Slug endothelial-specific KO mice; Dll4 loss-of-function rescue; γ-secretase inhibition rescue; VEGF signaling inhibition; Notch target gene analysis |
Nature communications |
High |
33106502
|