| 1991 |
EGR3 encodes a 387 amino acid zinc-finger transcription factor with three Cys2-His2 zinc fingers that can activate transcription of a CAT reporter gene linked to the cis element CGCCCCCGC, the same target sequence recognized by EGR1 and EGR2. EGR3 is induced as an immediate-early gene by mitogenic stimulation. |
CAT reporter assay, low-stringency hybridization cloning, Northern blot |
Oncogene |
High |
1906159
|
| 1994 |
Egr3/Pilot is rapidly and transiently induced in hippocampal and cortical neurons by electroconvulsive seizure, NMDA receptor activation, and dopamine-altering drugs; it binds the same consensus DNA sequence as Egr1/zif268 and the two proteins are co-expressed in the same neurons, suggesting competitive or cooperative transcriptional regulation at shared target sites. |
Differential cDNA cloning, Northern blot, gel shift (EMSA) for DNA binding, in situ hybridization, pharmacological manipulations |
Learning & Memory |
High |
10467592
|
| 1998 |
Egr3 is essential for muscle spindle morphogenesis: Egr3-deficient mice lack muscle spindles entirely. Egr3 is expressed specifically in developing intrafusal myotubes (not in Ia afferent neurons) after innervation by sensory afferents, indicating that Egr3-mediated transcription in myotubes is required for spindle induction. |
Gene targeting (knockout mice), histology, in situ hybridization, nerve transection experiments |
Nature Genetics |
High |
9731539
|
| 1998 |
EGR3 expression in T cells (but not fibroblasts) is driven by a 27-bp promoter element that binds NF-ATp and NF-ATc, making it sensitive to cyclosporin A (CsA) inhibition of calcineurin/NF-AT signaling. In fibroblasts, different CsA-insensitive promoter regions drive EGR3 expression, and insufficient NF-ATp levels explain the lack of this element's activity there. |
Promoter deletion analysis, EMSA, transient transfection reporter assays, NF-ATp overexpression in fibroblasts |
Molecular and Cellular Biology |
High |
9819402
|
| 1998 |
Following electroconvulsive stimulation in hippocampal granule cells, Egr1 protein peaks at 0.5–1 h and decays by 4 h, whereas Egr3 protein peaks at 4 h; their DNA-binding activities follow the same sequential pattern, indicating they mediate early and late phases, respectively, of transcriptional responses at their shared consensus element. |
Western blot, gel shift assay (EMSA), electroconvulsive stimulation in vivo |
Journal of Neurochemistry |
Medium |
9489747
|
| 2001 |
Egr3 is required for intrafusal fiber differentiation and spindle maintenance after birth: in Egr3-deficient mice, myotubes are initially innervated by Ia afferents and begin spindle assembly, but fail to express slow-developmental myosin heavy chain, form thin capsules, and after birth the sensory and motor innervation withdraws and spindles disassemble. Egr3 expression in myotubes is controlled by innervation (lost after nerve transection). |
Egr3 KO analysis, immunohistochemistry, in situ hybridization, nerve transection |
Developmental Biology |
High |
11401400
|
| 2004 |
EGR3 is a direct transcriptional target of estrogen receptor alpha (ERα) in breast cancer MCF-7 cells; EGR3 in turn transcriptionally induces NAB2 and FasL. Cycloheximide and ICI 182,780 (ERα antagonist) block EGR3 induction, confirming it is a primary ERα target. |
Northern blot, cycloheximide/ICI 182,780 treatment, stable transfection with inducible EGR3, microarray, reporter assay |
Journal of Molecular Endocrinology |
Medium |
15171706
|
| 2005 |
Egr3 directly up-regulates GABRA4 promoter activity in hippocampal neurons, and Egr3 knockout mice have ~50% less GABRA4 mRNA in hippocampus. After pilocarpine-induced status epilepticus, Egr3 binds to the GABRA4 promoter (shown by ChIP) and both GABRA4 and alpha4 subunit protein are increased, establishing Egr3 as a transcriptional regulator of GABRA4 in epilepsy. |
Reporter gene transfection in primary hippocampal neurons, Egr3 KO mice, ChIP, in vivo seizure model |
PNAS |
High |
16091474
|
| 2005 |
Egr2 and Egr3 function as negative regulators of T cell activation and promote anergy by inducing expression of the E3 ubiquitin ligase Cbl-b. Egr3-deficient T cells have reduced Cbl-b expression and are resistant to peptide-induced tolerance in vivo. |
Microarray, overexpression in T cells, Egr3 KO mice, in vivo tolerance assay |
Nature Immunology |
High |
15834410
|
| 2006 |
Egr3 is transiently induced by pre-TCR signaling in thymocytes and promotes a distinct proliferative phase by reducing E protein-dependent RORγt expression and physically interacting with RORγt to prevent induction of RORγt target genes. After Egr3 levels subside, RORγt activity increases to promote gene rearrangement. |
Genetic epistasis (RORγt, Egr3, E protein manipulation), thymocyte proliferation assays, protein interaction studies |
Immunity |
Medium |
16782036
|
| 2007 |
Egr3 is required for normal hippocampal long-term potentiation (LTP) — both early and late phase — and for hippocampal and amygdala-dependent short-term and long-term learning and memory, independently of Egr1 (Egr1 protein levels are unchanged in Egr3 KO brain). |
Egr3 KO mice, electrophysiological LTP recordings, behavioral memory tests (fear conditioning, etc.), Western blot for Egr1 |
Molecular and Cellular Neurosciences |
High |
17350282
|
| 2008 |
Egr3 is induced by NGF signaling in sympathetic neurons and is required for their normal terminal axon extension and branching in target tissues, but not for neuron survival. Egr3-deficient mice have severe sympathetic target tissue innervation abnormalities and physiological dysautonomia. |
Egr3 KO mice, immunohistochemistry, physiological autonomic function assays, NGF treatment |
Development |
High |
18653557
|
| 2010 |
EGR1, EGR2, and EGR3 all activate NAB2 transcription through similar cis-regulatory elements in melanoma and carcinoma cells, establishing a negative feedback loop (NAB2 represses EGR-induced transcription). EGR3 depletion by siRNA reduces endogenous NAB2 levels; EGR3 also regulates EGR2 expression. |
siRNA knockdown, reporter assays, kinetic expression studies |
Journal of Cellular Biochemistry |
Medium |
20506119
|
| 2011 |
BDNF increases NMDA receptor NR1 subunit levels in cortical neurons via MAPK pathway activation of TrkB, and this NR1 transcription is controlled by binding of both CREB and Egr3 to the core NR1 promoter region. |
BDNF treatment of rat cortical neurons, reporter assays, MAPK pathway inhibition, protein expression analysis |
Journal of Neurochemistry |
Medium |
22035109
|
| 2011 |
EGR3 binds to the promoter of TREM-1 in monocytes as demonstrated by ChIP, indicating that EGR3 directly regulates TREM-1 gene expression. |
In silico binding site prediction and in vivo ChIP assay |
Brain, Behavior, and Immunity |
Medium |
21421043
|
| 2012 |
Deletion of both Egr2 and Egr3 in lymphocytes causes lethal autoimmunity with hyperactive STAT1/STAT3 and impaired antigen receptor-induced AP-1 activation. Egr2 and/or Egr3 directly induce expression of SOCS1 and SOCS3 (inhibitors of STAT1/STAT3), and block function of Batf (an AP-1 inhibitor). |
Conditional double KO mice, cytokine profiling, STAT phosphorylation assays, promoter analysis, ChIP |
Immunity |
High |
23021953
|
| 2013 |
Egr3 has a sympathetic neuron-autonomous role: isolated Egr3-deficient sympathetic neurons have neurite outgrowth defects in response to NGF, and neuron-specific Egr3 ablation recapitulates the target tissue innervation abnormalities of germline KO. Microarray identified target genes involved in axonogenesis, dendritogenesis, and axon guidance; Egr3 specifically regulates dendrite morphology and terminal axon branching. |
Cre-mediated sympathetic neuron-specific KO, primary neuron culture with NGF, microarray, genetic neuronal labeling |
Journal of Neuroscience |
High |
23467373
|
| 2013 |
NRG1 signaling induces Egr3 transcription in muscle cells through a composite SRF-CREB regulatory element in the Egr3 promoter. NRG1 targets SRF by stimulating nuclear translocation of MRTF-A and MRTF-B coactivators, and phosphorylates CREB. The Erk1/2 MAP kinase is required upstream of CREB phosphorylation for NRG1-induced Egr3 transcription. |
Reporter assays with promoter deletions/mutations, MRTF nuclear translocation assays, CREB phosphorylation assays, ERK inhibition in cultured muscle cells and in vivo immunostaining at spindles |
Experimental Cell Research / Journal of Neuroscience Research |
High |
23318675 24272970
|
| 2014 |
Egr3 protein co-localizes with the meiotic spindle and cytosolic microtubule organizing centers (MTOCs) in mouse oocytes, accumulating around γ-tubulin. Nocodazole-induced microtubule depolymerization disrupts Egr3 localization. However, in vitro microtubule interaction assay showed Egr3 does NOT directly bind polymerized microtubules, suggesting an indirect association with MTOCs. |
Immunofluorescence with Egr3-specific antibodies, co-localization with γ-tubulin, nocodazole treatment, in vitro microtubule binding assay |
PloS One |
Medium |
24722338
|
| 2014 |
Egr3 promotes γδ T cell development in the thymus: Egr3 transgenic (overexpressing) mice show a marked increase in peripheral γδ T cells, and thymocytes from these mice are biased toward γδ T cell development. Egr3-induced γδ T cells promote Th17 differentiation when co-cultured with wildtype CD4+ T cells. |
Egr3 transgenic mice, flow cytometry, thymocyte differentiation assays, co-culture experiments, bleomycin lung inflammation model |
PloS One |
Medium |
24475259
|
| 2015 |
Egr3 has a skeletal muscle cell-autonomous role in intrafusal fiber differentiation: cell-specific Egr3 ablation in muscle blocks myotube development after Ia-afferent contact, producing shortened 'spindle remnants' that lack fusimotor innervation and fail to express GDNF (required for fusimotor neuron survival), but retain NT3 expression and Ia-afferent innervation. |
Conditional (muscle-specific) Egr3 KO, genetic lineage tracing, immunohistochemistry for MyHC, NT3, GDNF |
Journal of Neuroscience |
High |
25855173
|
| 2015 |
Egr3 has opposing roles in nucleus accumbens MSN subtypes in cocaine action: repeated cocaine induces Egr3 in D1-MSNs and reduces it in D2-MSNs. Overexpression of Egr3 in D1-MSNs enhances cocaine reward and locomotion, while overexpression in D2-MSNs blunts these behaviors. Cocaine alters Egr3 binding to promoters of downstream genes including Camk2α, CREB, FosB, Nr4a2, Sirt1 (increased binding in D1-MSNs) and G9a, Dnmt3a (decreased binding). |
RiboTag cell-type-specific transcriptomics, Cre-inducible AAV overexpression/knockdown, D1-Cre and D2-Cre mice, ChIP |
Journal of Neuroscience |
High |
25995477
|
| 2015 |
Egr3 is required for sleep-deprivation-induced expression of Htr2a (serotonin 2A receptor) in mouse cortex: sleep deprivation induces a 2-fold increase in Htr2a mRNA in wildtype but not Egr3-/- mice. |
Egr3 KO mice, sleep deprivation, qPCR for Htr2a mRNA |
ACS Chemical Neuroscience |
Medium |
25857407
|
| 2016 |
Egr2 and Egr3 in T cells cooperatively prevent humoral autoimmunity by supporting TGF-β3 secretion from CD4+CD25-LAG3+ regulatory T cells. Egr2 and Egr3 maintain expression of Ltbp3 (latent TGF-β binding protein 3), which is required for TGF-β3 production; Egr2/3 double KO completely ablates TGF-β3 production from these cells. |
T cell-specific Egr2/Egr3 double KO mice, adoptive transfer, TGF-β3-expressing vector treatment, Ltbp3 expression analysis |
PNAS |
High |
27911796
|
| 2016 |
Egr3 promotes myoblast proliferation and survival: shRNA inhibition of Egr3 in C2C12 cells impairs proliferation rate, reduces NF-κB transcriptional activity, increases apoptotic markers (annexin V+, caspase-3/7, PARP), and the proliferation deficit is partially rescued by pan-caspase inhibitor Z-VAD-FMK. |
shRNA knockdown in C2C12 cells, NF-κB reporter assay, apoptosis assays (annexin V, caspase activity), caspase inhibitor rescue |
Journal of Cellular Physiology |
Medium |
27576048
|
| 2017 |
KSRP decreases EGR3 mRNA stability in an ARE-independent manner via miR-23a: KSRP facilitates miR-23a biogenesis, miR-23a directly binds EGR3 3'UTR reducing EGR3 expression, and EGR3 acts downstream of KSRP to promote NSCLC cell mobility and metastasis. |
KSRP overexpression/knockdown in NSCLC cells, microarray, miRNA screening, 3'UTR reporter assay, in vivo metastasis model |
Biochimica et Biophysica Acta - Gene Regulatory Mechanisms |
Medium |
28847731
|
| 2018 |
Egr3 is required for ECS-induced hippocampal expression of Bdnf: ECS induces high-level Bdnf expression in WT hippocampus (including exons IV and VI), but this induction is absent in Egr3-/- mice. The Bdnf promoter contains eight putative EGR3 binding sites, suggesting direct regulation. |
Egr3 KO mice, ECS, expression microarray, qRT-PCR, in situ hybridization, Bdnf promoter bioinformatics |
Frontiers in Behavioral Neuroscience |
Medium |
29867393
|
| 2018 |
EGR3 is a transcriptional regulator of late epidermal differentiation: EGR3 is highly expressed in the stratum granulosum, activates enhancers and drives expression of genes in the epidermal differentiation complex (including filaggrin, loricrin, involucrin targets), and 20 EGR3-specific late differentiation targets were identified. EGR3 expression is lost in parakeratotic lesional skin. |
Immunohistochemistry, RNA-seq, ChIP-seq for enhancer analysis, enhancer RNA detection, weighted gene co-expression network analysis |
Journal of Investigative Dermatology |
High |
30342896
|
| 2019 |
EGR3 sex-specifically regulates cocaine relapse: EGR3 protein is reduced only in female rodents after 20 days of forced abstinence from cocaine self-administration. Egr3 overexpression in NAc D2-MSNs during forced abstinence facilitates extinction and blunts drug-induced reinstatement in female mice but has the opposite effect in male mice. |
Intravenous cocaine self-administration, Western blot for EGR3 protein, virally mediated Egr3 overexpression via A2A-Cre, operant behavioral testing |
Biological Psychiatry |
Medium |
31858986
|
| 2020 |
EGR3 transcriptionally activates ZFP36, GADD45B, and SOCS3 by directly binding to their promoter regions, and suppresses EMT and cell migration/invasion in prostate cancer cells; EGR3 overexpression suppresses bone metastasis in mouse models. |
ChIP assay, luciferase reporter assay, EGR3 overexpression/knockdown in prostate cancer cells, mouse bone metastasis model |
Oncogene |
High |
32796959
|
| 2020 |
EGR3 directly binds the RELN (Reelin) promoter and activates RELN expression; EGR3 overexpression reduces neurite outgrowth in SH-SY5Y cells, an effect partially reversed by RELN knockdown, placing RELN downstream of EGR3 in neurite outgrowth regulation. |
ChIP, luciferase reporter assay, EGR3 overexpression/RELN knockdown in SH-SY5Y cells, neurite outgrowth quantification, microarray + IPA |
Journal of Neurochemistry |
Medium |
33113163
|
| 2020 |
miR-27a-5p inhibits cardiac fibrosis by suppressing EGR3 expression: miR-27a-5p targets EGR3 3'UTR (validated by reporter assay), and EGR3 suppression reduces TGF-β signaling and pro-fibrotic protein secretion in cardiac fibroblasts. In vivo, miR-27a-5p attenuates TAC-induced cardiac fibrosis. |
In silico Venn analysis, luciferase reporter assay, TAC mouse model, miR-27a KO and antisense inhibition, cardiac fibroblast culture |
Journal of Cellular and Molecular Medicine |
Medium |
33215816
|
| 2021 |
EGR3 is necessary for allergic inflammation: NF-κB p65 directly regulates EGR3 expression (binding to EGR3 promoter), and EGR3 in turn directly binds the HDAC6 promoter to increase HDAC6 expression, forming an EGR3-HDAC6-IL-27 signaling axis that mediates mast cell-dependent allergic responses and passive anaphylaxis. miR-182-5p is a direct negative regulator of EGR3 (validated by luciferase assay). |
RNA-seq, ChIP for NF-κB p65 on EGR3 promoter, ChIP for EGR3 on HDAC6 promoter, luciferase assay for miR-182-5p/EGR3 interaction, passive cutaneous and systemic anaphylaxis models |
Frontiers in Immunology |
High |
34234781
|
| 2021 |
Cocaine exposure enhances Egr3 binding to promoters of nuclear genes involved in mitochondrial dynamics (PGC1α, Drp1) in D1-MSNs; blunting Egr3 in D1-MSNs blocks cocaine-mediated enhancement of PGC1α and Drp1 expression and attenuates cocaine-induced enhancement of small-sized mitochondria. |
ChIP in NAc tissue, virally mediated Egr3 knockdown in D1-MSNs, mRNA quantification, mitochondrial morphology analysis (electron microscopy) |
Molecular Brain |
Medium |
34187517
|
| 2022 |
EGR3 directly regulates Htr2a (5-HT2AR) expression: ChIP in mouse frontal cortex demonstrated EGR3 protein binding to the Htr2a promoter in vivo, and EGR3 drives Htr2a reporter expression via two EGR3 binding sites. Sleep deprivation-induced upregulation of 5-HT2AR requires Egr3, as it does not occur in Egr3-/- mice. |
Egr3 KO mice, sleep deprivation, ChIP in vivo, luciferase reporter assay with EGR3 binding site mutations, qPCR and protein quantification |
Molecular Psychiatry |
High |
35001075
|
| 2022 |
Egr3 is required for activity-dependent expression of DNA damage response genes (Gadd45b, Gadd45g) and AP-1 family genes (Fos, Fosb), as well as Mef2c and Calb2, in the hippocampus following ECS. These genes are differentially expressed between WT and Egr3-/- mice after seizure. |
Expression microarray on hippocampi of WT vs Egr3-/- mice after ECS, bioinformatics/Enrichr pathway analysis |
Translational Psychiatry |
Medium |
35941129
|
| 2023 |
EGR3 directly binds to the MCL1 promoter to activate its transcription, and this EGR3-MCL1 axis confers tamoxifen resistance in ERα-positive breast cancer cells by suppressing apoptosis. Estrone upregulates EGR3 expression in tamoxifen-resistant cells. |
ChIP, dual luciferase assay, EGR3 overexpression/knockdown, apoptosis assays (CCK8, colony formation, flow cytometry), Western blot |
Journal of Cancer Research and Clinical Oncology |
Medium |
37999751
|
| 2024 |
EGR3 functions as a conserved mechanosensitive transcription factor required for cardiac valve morphogenesis: egr3 null zebrafish completely lack valve leaflets, leading to blood regurgitation. EGR3 acts cell-autonomously in endothelial cells, and one downstream effector is the nuclear receptor Nr4a2b. Mechanical forces upregulate egr3/EGR3 expression in zebrafish heart, porcine valvular endothelial cells, and during human aortic valve remodeling. |
egr3 null zebrafish (CRISPR), tissue-specific loss- and gain-of-function tools, live imaging of valve morphogenesis, in vitro mechanostimulation of porcine valvular endothelial cells |
Science Advances |
High |
38748804
|
| 2024 |
EGR3 negatively regulates adipogenesis: EGR3 is downregulated by cortisol in adipose tissue of obese subjects and high-fat-diet mice. EGR3 suppresses adipogenesis and lipogenesis in hADSCs and 3T3-L1 cells via transcriptional regulation of HDAC6 (a downstream target gene and negative regulator of adipogenesis). |
EGR3 overexpression/knockdown in hADSCs and 3T3-L1 cells, cortisol treatment, ChIP/reporter analysis of HDAC6 as EGR3 target |
Cell Death Discovery |
Medium |
38467615
|