| 1992 |
NRG1 (heregulin/NDF) was purified as a 44-45 kDa glycoprotein ligand that specifically induces phosphorylation of p185erbB2/Neu receptor at picomolar concentrations, establishing NRG1 as the activating ligand for the ErbB2 receptor tyrosine kinase. |
Protein purification from conditioned medium, Scatchard binding analysis, chemical cross-linking with radiolabeled ligand, immunoprecipitation |
Science / Cell |
High |
1348215 1350381
|
| 1993 |
Glial growth factors (GGF), mitogenic proteins for Schwann cells, are alternatively spliced isoforms of NRG1 and act as ligands for p185erbB2 receptor, with alternative splicing generating membrane-attached, intracellular and secreted signaling proteins. |
cDNA cloning, alternative splicing analysis, in situ hybridization, receptor binding assays |
Nature |
High |
8096067
|
| 1993 |
NDF (NRG1) binds with high affinity (Kd ~10^-9 M) to mammary cells via a complex requiring both ErbB2/Neu and an additional cellular co-receptor; ovarian cells overexpressing Neu did not show covalent cross-linking to NDF and lacked NDF-induced PI3-kinase association, indicating cell-type-specific receptor requirements. |
Radiolabeled NDF cross-linking, monoclonal antibody blocking, direct binding analysis, PI3-kinase co-immunoprecipitation |
The EMBO journal |
High |
8096177
|
| 1994 |
Co-expression of ErbB2 and ErbB3 reconstitutes a high-affinity heregulin (NRG1) binding receptor; ErbB3 alone binds heregulin with lower affinity and shows little tyrosine phosphorylation, whereas the ErbB2/ErbB3 heterodimer generates robust tyrosine phosphorylation signaling. Chemical cross-linking confirmed direct interaction of heregulin with both ErbB2 and ErbB3 in the heterodimer. |
Receptor transfection/reconstitution, Scatchard binding analysis, 125I-heregulin cross-linking, immunoprecipitation, tyrosine phosphorylation assays |
The Journal of biological chemistry |
High |
7514177
|
| 1995 |
HRG (NRG1) beta2 stimulates tyrosine phosphorylation of ErbB2, ErbB3, and ErbB4 in breast cancer cells, induces formation of Shc-Grb2 complexes and receptor-Shc complexes, and stimulates PI3-kinase association with ErbB3, revealing multiple inputs into Ras signaling; ErbB3 associates with PI3-kinase but Grb2 associates with ErbB2 and ErbB4 but not ErbB3, indicating mechanistic differences in Ras coupling among ErbB receptors. |
Tyrosine phosphorylation assays, co-immunoprecipitation, PI3-kinase association assays, cell proliferation assays |
Cell growth & differentiation |
High |
9019162
|
| 1995 |
NRG1 beta isoforms bind ErbB-3 directly (Kd = 2.2 nM) and exert mitogenic effects on keratinocytes, whereas alpha isoforms bind the same receptor with lower affinity and produce minimal mitogenesis, demonstrating that different NRG1 isoforms elicit distinct growth regulatory effects through differential binding affinity to ErbB-3. |
Radioligand binding assays, mitogenesis assays, RT-PCR for receptor expression, keratinocyte culture |
Oncogene |
High |
7731691
|
| 1995 |
HRG (NRG1) induces HER2-HER3 heterodimerization; ATP-binding-site mutants demonstrate that HER2 transphosphorylates HER3 (but not vice versa), and HRG-induced HER3 transphosphorylation enhances SHC and PI3-kinase association and confers transforming activity to NIH 3T3 cells co-expressing HER2 and HER3. |
ATP-binding-site kinase-dead mutants, co-immunoprecipitation, NIH 3T3 transformation assay, PI3-kinase association assay |
The EMBO journal |
High |
7556068
|
| 1996 |
ErbB-2 functions as a pan-ErbB auxiliary subunit by forming heterodimers with both ErbB-1 (EGFR) and NDF receptors (ErbB-3 and ErbB-4); ErbB-2 overexpression enhances binding affinities of both EGF and NDF by decelerating ligand dissociation rates, thereby prolonging and potentiating downstream ERK and SAPK/JNK signaling cascades. Removal of ErbB-2 from the cell surface almost completely abolished NDF binding. |
ErbB-2 overexpression, ER-trapped antibody to block cell surface delivery, kinetic binding analysis, co-immunoprecipitation, MAP kinase/JNK activity assays |
The EMBO journal |
High |
8617201
|
| 1996 |
GGF/neuregulin (NRG1) acts as a mitogen for pro-oligodendrocytes and oligodendrocytes, promotes their survival under serum-free conditions, and at high concentrations reversibly inhibits differentiation and lineage commitment; all three ErbB receptors (ErbB2, ErbB3, ErbB4) are expressed by oligodendrocyte progenitors and are activated by GGF, with relative abundance changing during differentiation. Cortical neurons release a soluble GGF-like mitogen for pro-oligodendrocytes that is blocked by anti-GGF antibodies. |
Cell culture proliferation/survival assays, antibody blocking, Western blot for ErbB receptor phosphorylation, neuron-conditioned medium experiments |
Neuron |
High |
8780647
|
| 1996 |
GGF/neuregulin (NRG1) is expressed by migrating cortical neurons and promotes their migration along radial glial fibers; concurrently, GGF promotes maintenance and elongation of radial glial cells via ErbB2 receptor signaling. In the absence of ErbB2-mediated GGF signaling, radial glial development is abnormal. GGF regulation of radial glial development is mediated in part by brain lipid-binding protein (BLBP). |
In vivo mouse cortical development analysis, antibody inhibition, ErbB2 knockout analysis, BLBP expression studies |
Development (Cambridge, England) |
High |
9342043
|
| 1997 |
NRG1 isoform-specific functions in vivo: Type I neuregulin is required for generation of neural crest-derived neurons in cranial ganglia and for trabeculation of the heart ventricle, while Type III neuregulin plays an important role in early Schwann cell development, demonstrating that distinct NRG1 isoforms have non-redundant functions in development. |
Targeted isoform-specific gene mutations in mice, in situ hybridization, histological analysis of developmental phenotypes |
Development (Cambridge, England) |
High |
9342050
|
| 1997 |
NDF (NRG1) signaling in prostate cancer cells via ErbB3/ErbB2 heterodimers (not ErbB1) activates PI3-K, ERK/MAPK, mHOG/p38, and JNK/SAPK pathways but not PLCγ or STAT signaling; ErbB3-PI3-K association forms a striking 'activation complex' with multiple tyrosine-phosphorylated species. NDF inhibits LNCaP growth and induces epithelial-like morphological change in contrast to TGF-α. |
Immunoprecipitation, Western blot for phosphorylation, PI3-K activation assays, proliferation assays |
Oncogene |
Medium |
9400997
|
| 1997 |
Schwann cells express NDF and SMDF/n-ARIA NRG1 mRNAs, secrete neuregulin protein (~45 kDa), and show constitutive activation of ErbB3 receptor, demonstrating an autocrine neuregulin loop in Schwann cells. An anti-neuregulin antibody inhibits Schwann cell proliferation in response to neurons and also blocks proliferation induced by unrelated mitogens including bFGF, HGF, and TGF-β1, indicating that neuregulin autocrine signaling is a convergence point for multiple mitogenic signals. |
RT-PCR, ELISA for neuregulin secretion, ErbB3 activation assays, antibody blocking of proliferation |
Experimental neurology |
Medium |
9417836
|
| 1997 |
Neuregulin-2 (NRG-2) is a distinct gene product (not NRG1) whose EGF-like domain binds ErbB3 and ErbB4; however, NRG-2 stimulates different ErbB-receptor tyrosine-phosphorylation profiles than NRG1, indicating that NRG1 and NRG-2 mediate distinct biological processes despite shared receptor binding. |
Ligand binding assays, receptor phosphorylation profiling, expression analysis |
Nature |
Medium |
9168115
|
| 1998 |
NRG1 (as rhGGF2) promotes survival, inhibits apoptosis, and induces hypertrophic growth of neonatal and adult rat cardiac myocytes via ErbB2 and ErbB4 receptors expressed on these cells. NRG1 mRNA is produced by coronary microvascular endothelial cells and is upregulated by endothelin-1, establishing a paracrine endothelial-to-cardiomyocyte NRG1 signaling axis. |
Isolated cardiomyocyte cultures, proliferation/apoptosis assays, receptor phosphorylation, RT-PCR for NRG1 in endothelial cells, endothelin-1 stimulation |
The Journal of biological chemistry |
High |
9553078
|
| 1999 |
MPA (progestin) induces HRG (NRG1) mRNA expression in mouse mammary tumor cells; antisense oligonucleotides to HRG inhibit MPA-induced cell growth, demonstrating HRG acts as a mediator of progestin-induced proliferation. Both HRG and MPA proliferative effects require ErbB-2 and a functional IGF-1 receptor. |
Antisense oligodeoxynucleotides, RT-PCR, tyrosine phosphorylation assays, proliferation assays |
Oncogene |
Medium |
10597237
|
| 1999 |
In human ovarian carcinoma cells, NRG1 (HRG) activates HER3 independently of HER2 in some cell lines; EGF preferentially induces EGFR-HER2 heterodimers while HRG preferentially activates HER3/HER4 depending on receptor abundance; EGF and HRG mediate cell growth through distinct receptor complexes (EGFR/HER2 vs. HER4), while HER3 alone does not mediate growth even when phosphorylated. |
Receptor co-immunoprecipitation, phosphorylation assays, proliferation assays across cell lines with different receptor expression |
Journal of cellular biochemistry |
Medium |
10733345
|
| 2002 |
NRG1 was identified as a susceptibility gene for schizophrenia by genome-wide linkage scan and haplotype-association analysis; NRG1 hypomorphic mice have fewer functional NMDA receptors, and ErbB4 receptor reduction produces behavioral phenotypes overlapping with mouse models of schizophrenia. The behavioral phenotypes of NRG1 hypomorphs are partially reversible with clozapine treatment. |
Genome-wide linkage scan, haplotype association, NRG1 hypomorph mouse behavioral analysis, NMDA receptor quantification, clozapine pharmacological rescue |
American journal of human genetics |
High |
12145742 12478479
|
| 2003 |
In differentiated human airway epithelia, NRG1 (heregulin-alpha) is segregated exclusively to the apical membrane while its receptors ErbB2-4 localize to the basolateral membrane, physically separated by tight junctions. Upon mechanical injury, heregulin-alpha activates ErbB2 in cells at the wound edge, promoting restoration of epithelial integrity. This ligand-receptor segregation mechanism regulates NRG1/ErbB signaling. |
Confocal microscopy of polarized epithelia, mechanical injury assays, receptor phosphorylation after injury, tight junction manipulation |
Nature |
High |
12646923
|
| 2005 |
αvβ3 integrin regulates NRG1 (HRG)-induced ERK1/2 MAPK activation and cell proliferation; HRG promotes αvβ3 expression through its downstream effector CYR61; blockade of αvβ3 impairs HRG-promoted ERK1/2 hyperactivation without altering AKT activation, and αvβ3 antagonists decrease S- and G2/M-phase subpopulations with increased p27Kip1 nuclear translocation. |
αvβ3 antagonists, antisense oligodeoxynucleotides, flow cytometry, ERK/AKT phosphorylation assays, p27Kip1 nuclear translocation |
Oncogene |
Medium |
15782133
|
| 2006 |
In schizophrenia postmortem prefrontal cortex, NRG1-induced activation of ErbB4 is markedly increased compared to controls despite no change in NRG1 or ErbB4 protein levels. This hyperactivation correlates with substantially increased ErbB4-PSD95 interactions (PSD95 facilitates ErbB4 activation). NRG1 stimulation suppresses NMDA receptor activation in human prefrontal cortex, and this suppression is more pronounced in schizophrenia, suggesting NRG1-ErbB4 hyperactivation contributes to NMDA receptor hypofunction. |
Postmortem tissue stimulation with NRG1, ErbB4 phosphorylation assays, PSD95-ErbB4 co-immunoprecipitation, NMDA receptor activation measurement |
Nature medicine |
High |
16767099
|
| 2006 |
Disease-associated SNPs in the 5' upstream region of NRG1 regulate mRNA expression of specific isoforms: SNP8NRG221132 interacts with schizophrenia diagnosis to affect Type I NRG1 (34% increase in schizophrenia), and SNP8NRG243177 within the risk haplotype is associated with expression of the novel Type IV NRG1 isoform. Bioinformatic analysis reveals these SNPs alter binding sites for SRF, MYT1, and HMG Box Protein-1 transcription factors. |
Quantitative RT-PCR of postmortem hippocampus, genotype-expression correlation, bioinformatic promoter analysis |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
16618933
|
| 2007 |
Notch1 signaling in ventricular endocardium directly regulates EphrinB2 expression (a direct Notch transcriptional target), which acts upstream of NRG1 in trabeculation; NRG1 signaling mediates cardiomyocyte differentiation downstream of Notch-EphrinB2, while BMP10 independently regulates cardiomyocyte proliferation. RBPJk/Notch1 mutants show attenuated NRG1 expression and signaling. |
RBPJk and Notch1 mutant mice, NRG1 expression analysis, exogenous NRG1 rescue of differentiation defects in cultured RBPJk mutant hearts, luciferase reporter assays for EphrinB2 as Notch target |
Developmental cell |
High |
17336907
|
| 2009 |
NRG1 induces mononucleated (but not binucleated) cardiomyocytes to proliferate via ErbB4 signaling; genetic inactivation of ErbB4 reduces cardiomyocyte proliferation while increased ErbB4 expression enhances it. Injection of NRG1 in adult mice induces cardiomyocyte cell-cycle activity and promotes myocardial regeneration, improving cardiac function after myocardial infarction without contribution from undifferentiated progenitor cells. |
ErbB4 genetic knockout/overexpression, NRG1 injection in adult mice, cardiomyocyte cell cycle analysis, post-infarction cardiac function measurement, cell lineage tracing |
Cell |
High |
19632177
|
| 2009 |
NRG1/ERBB3 signaling inhibits melanocyte maturation and promotes undifferentiated, migratory, and proliferative characteristics; ERBB3 signaling was necessary and sufficient to inhibit differentiation of later-stage melanocytes in culture. NRG1-treated melanocytes showed increased proliferation, invasion, and altered morphology with decreased differentiation gene expression and increased proliferation/metastasis gene levels. |
ERBB3 knockout analysis in embryos, NRG1 treatment of cultured melanocytes, proliferation/invasion assays, gene expression profiling |
Pigment cell & melanoma research |
Medium |
19659570
|
| 2009 |
Erbin, a protein with LRR and PDZ domains that interacts specifically with ErbB2, is necessary for NRG1 signaling and myelination of the peripheral nervous system. Erbin null mice show hypomyelination and aberrant unmyelinated axon ensheathing; Erbin's PDZ domain binds and stabilizes ErbB2, which is required for NRG1 signaling. Loss of Erbin destabilizes ErbB2 protein and compromises NRG1 signaling. |
Erbin knockout and PDZ-domain-deleted knockin mice, sciatic nerve histology, ErbB2 protein stability assays, nerve conduction velocity measurement, siRNA knockdown |
Proceedings of the National Academy of Sciences of the United States of America |
High |
19458253
|
| 2010 |
LH induces expression of Type III NRG1 transcripts in granulosa cells in an ERK1/2 and C/EBPβ-dependent manner during ovulation. NRG1 binds ERBB3/ERBB2 complexes on granulosa and cumulus cells, selectively stimulates AKT/PKB phosphorylation over ERK1/2, and synergizes with amphiregulin (AREG) to enhance ERK1/2 phosphorylation, progesterone production, and oocyte developmental competence. |
Western blotting, granulosa cell culture, AKT/ERK phosphorylation assays, progesterone RIA, oocyte developmental competence assay, conditional ERK1/2 inhibition |
Molecular endocrinology |
Medium |
21047912
|
| 2011 |
NRG1 isoform expression in the brain is regulated by neuronal activity; activity causes significant increases in Type I and Type IV NRG1. Type IV NRG1 upregulation by neuronal activity requires a CRE cis-element in the 5' UTR that binds CREB transcription factor. Each NRG1 isoform (Types I-VI) shows a distinct developmental expression pattern and is regulated by distinct mechanisms. |
RT-PCR for isoform quantification, CREB binding site mutation, luciferase reporter assays, neuronal activity manipulation (KCl depolarization) |
The Journal of neuroscience |
Medium |
21653853
|
| 2013 |
RET and NRG1 genetically interact in Hirschsprung disease; in mouse neural crest cells, NRG1 inhibits GDNF-induced neuronal differentiation and GDNF negatively regulates NRG1 signaling by downregulating ErbB2 receptor expression, indicating that the balance between NRG1/ErbB and RET/GDNF signaling is critical for enteric nervous system neurogenesis/gliogenesis. |
Mouse neural crest cell culture, NRG1 and GDNF treatment, neuronal differentiation assays, receptor expression analysis by Western blot, conditional logistic regression for genetic interactions |
Human genetics |
Medium |
23400839
|
| 2014 |
p63 transcription factor directly activates NRG1 gene transcription in mammary basal cells during pregnancy; basal cell NRG1 signals paracrinally to luminal cells via ERBB4, leading to STAT5A activation and luminal progenitor cell maturation for lactation. Genetic deletion of p63 exclusively in basal cells causes lactation failure due to failure of luminal cell proliferation and differentiation. |
Conditional p63 knockout in adult mammary basal cells, ChIP for p63 binding to Nrg1 promoter, ERBB4/STAT5A phosphorylation assays, mammary gland histology and functional lactation assay |
Developmental cell |
High |
24412575
|
| 2014 |
TrkB interacts with ErbB4 (the NRG1 receptor) and this interaction is increased following NRG1 treatment; NRG1 induces GABAR-mediated TrkB activation and BDNF release via ErbB4, which in turn phosphorylates NMDA receptor subunit NR2B. TrkB kinase inhibition or TrkB siRNA suppresses NRG1-induced NR2B activation, and TrkB-ErbB4 interaction is reduced in prefrontal cortex of schizophrenia subjects. |
Co-immunoprecipitation, proximity ligation assay, TrkB inhibitor K252a, TrkB siRNA, TrkB knockout neurons, BDNF neutralizing antibody, TrkB domain mutants |
Cell communication and signaling |
Medium |
25052836
|
| 2014 |
mTORC2 is a necessary component of HRG (NRG1)/ErbB2-induced cellular transformation; HRG activates PI3-kinase and mTORC1, and mTORC2 regulates the AKT/TSC2/mTORC1 axis by controlling AKT phosphorylation at both T308 (PDK1-dependent) and S473 (mTORC2-dependent) sites. Elimination of Rictor (mTORC2 component) abolishes both mTORC1 activation and HRG-mediated anchorage-independent growth. |
mTOR inhibitors (rapamycin and INK-128), Rictor siRNA/knockout, AKT phosphorylation assays at multiple sites, anchorage-independent growth assays |
Molecular cancer research |
Medium |
24615340
|
| 2015 |
DISC1 inhibits NRG1-induced ErbB4 activation in mature cortical interneurons; this inhibition is mediated by competitive inhibition of ErbB4 binding to PSD95 by DISC1. Cell-type-specific gene modulation shows that interneuronal DISC1 affects NRG1-ErbB4-mediated phenotypes in fast-spiking interneuron-pyramidal neuron circuits. |
Cell-type-specific viral gene modulation in vitro and in vivo, mutant DISC1 mouse model, ErbB4 phosphorylation assays, PSD95-ErbB4 co-immunoprecipitation, electrophysiology |
Nature communications |
High |
26656849
|
| 2015 |
NRG1 and HGF provide resistance to MEK inhibitor (trametinib) treatment in metastatic uveal melanoma; mechanistically, trametinib enhances NRG1 responsiveness, and NRG1 sustains AKT signaling through ERBB3 to bypass MEK inhibition. Inhibition of ERBB3 or AKT overcomes NRG1-provided resistance; stromal fibroblasts producing NRG1 confer resistance via paracrine signaling. |
Growth factor screening, NRG1 stimulation with MEK inhibitor, AKT/ERBB3 phosphorylation assays, ERBB3 inhibition, conditioned medium experiments, xenograft models |
Cancer research |
Medium |
25952648
|
| 2016 |
CD74-NRG1 fusion gene expression promotes phosphorylation of ErbB2/3, activates PI3K/AKT/NF-κB signaling, and enhances expression of secreted IGF2 in an NF-κB-dependent manner; IGF2 activates IGF1R to create an autocrine/paracrine circuit that promotes cancer stem cell properties and tumor initiation. Inhibition of ErbB2, PI3K, NF-κB, or IGF2 suppresses tumor sphere formation. |
ErbB2/3 phosphorylation assays, NF-κB reporter, IGF2 ELISA, IGF1R phosphorylation, limiting dilution xenograft assay, pharmacological inhibition of pathway components |
Cancer research |
Medium |
26837769
|
| 2016 |
A RET-ER81-NRG1 signaling pathway in mechanosensory neurons is required for Pacinian corpuscle formation; Ret maintains Er81 expression, Er81 (but not myelination-related NRG1 isoforms) controls specific Nrg1 isoform expression needed for axon-nonmyelinating Schwann cell communication. Ablating Nrg1 in mechanosensory neurons eliminates Pacinian corpuscles, and distinct NRG1 isoforms are used to interact with myelinating vs. non-myelinating Schwann cells. |
Er81 conditional knockout, Nrg1 conditional knockout in sensory neurons, histological analysis of Pacinian corpuscles, isoform-specific RT-PCR |
The Journal of neuroscience |
Medium |
27707970
|
| 2017 |
Spironolactone inhibits ErbB4 receptor phosphorylation and acts as an antagonist of NRG1-ErbB4 signaling; transgenic mice overexpressing Nrg1 type III display cortical ErbB4 hyperphosphorylation, and spironolactone treatment reverses this hyperphosphorylation. Spironolactone treatment ameliorates schizophrenia-relevant behavioral endophenotypes (sensorimotor gating, hyperactivity, working memory) in Nrg1 type III transgenic mice and increases spontaneous inhibitory postsynaptic currents in cortical slices. |
Cell-based split-TEV assay screening, ErbB4 phosphorylation biochemical assays, NRG1 type III transgenic mice, behavioral tests, cortical slice electrophysiology |
EMBO molecular medicine |
Medium |
28743784
|
| 2018 |
NRG1-Fc (a fusion protein of NRG1 EGF-like domain with IgG1 Fc domain) triggers potent AKT activation in the liver, lowers blood glucose, improves insulin sensitivity, and suppresses food intake in obese mice. NRG1-Fc acts as a secretagogue for FGF21 (largely dispensable for its metabolic effects) and directly targets hypothalamic POMC neurons to promote membrane depolarization and increase firing rate, establishing dual hepatic and central mechanisms. |
NRG1-Fc injection in obese mice, AKT phosphorylation in liver, electrophysiology of POMC neurons, FGF21 knockout mice, glucose tolerance tests |
JCI insight |
Medium |
29515030
|
| 2018 |
SLC3A2-NRG1 fusion protein contains the SLC3A2 transmembrane domain and NRG1 EGF-like domain; it binds ERBB3 and ERBB4, promotes ERBB2-ERBB3 heterocomplex formation, and activates PI3K-AKT and MAPK signaling to drive colony formation and tumor growth. Dual inhibition of both ERBB2 and ERBB3 (but not either alone) is required to effectively block downstream signaling from this fusion. |
Ligand-receptor binding assays, ERBB2/3 co-immunoprecipitation, siRNA knockdown of ERBB2/ERBB3, pharmacological inhibition (pertuzumab, lumretuzumab, afatinib), xenograft models |
Molecular cancer therapeutics |
High |
29959202
|
| 2019 |
NRG1 fusions (including CD74-NRG1, ATP1B1-NRG1, SDC4-NRG1) encode chimeric ligands that activate ERBB receptor tyrosine kinase family signaling by presenting the NRG1 EGF-like domain on the cell surface, leading to HER3-HER2 heterodimerization and downstream PI3K-AKT and MAPK pathway activation, driving oncogenic growth in solid tumors. |
RNA sequencing for fusion detection, ERBB2/3 phosphorylation assays in fusion-positive cell lines, xenograft tumor models, bispecific antibody (zenocutuzumab) blocking of HER3-NRG1 interaction |
Cancer discovery |
High |
35135829
|
| 2020 |
NRG1 ubiquitination is increased in stress-susceptible mice; the E3 ubiquitin ligase Nedd4l directly targets NRG1 for ubiquitin-mediated degradation in the medial prefrontal cortex (mPFC). Overexpression of Nedd4l decreases NRG1 protein levels and causes vulnerability to stress-induced depression-like behaviors, while downregulation of Nedd4l in mPFC rescues stress vulnerability. NRG1 overexpression attenuates depression-like behaviors in CSDS model. |
Ubiquitination assays, Nedd4l overexpression/knockdown via viral vectors, NRG1 protein quantification, CSDS behavioral model, RNA sequencing |
Translational psychiatry |
Medium |
32703967
|
| 2020 |
NRG1/ERBB4 autocrine signaling in cardiac endothelial cells (ECs) plays a role in modulating hypertrophic and fibrotic responses during early cardiac remodeling; EC-specific ERBB4 knockout attenuates myocardial hypertrophy and fibrosis 8 weeks after transverse aortic constriction and reduces fibrosis after angiotensin II treatment, though these differences normalize over time. RNA sequencing shows NRG1 controls expression of hypertrophic and fibrotic pathway genes in ECs. |
EC-specific Erbb4 conditional knockout, transverse aortic constriction model, angiotensin II treatment, cardiac histology, RNA sequencing of cultured ECs |
American journal of physiology. Heart and circulatory physiology |
Medium |
32618511
|
| 2021 |
Biallelic variants in ERBB3 and ERBB2 (NRG1 receptors) cause a developmental disorder with HSCR, CIPO, peripheral neuropathy, and arthrogryposis; gut histology reveals aganglionosis and smooth muscle abnormalities. Mouse single-cell RNA sequencing and conditional ErbB3-deficient mouse show a primary role for ERBB3 in enteric progenitors. Functional analyses reveal the identified variants cause decreased expression or altered phosphorylation of the mutant receptors. |
Trio-exome sequencing, ErbB3 conditional mouse knockout, single-cell RNA sequencing, RT-qPCR and immunoblot of patient-derived fibroblasts and transfected cells |
The Journal of clinical investigation |
High |
33497358
|
| 2021 |
VAMP2-NRG1 and SLC3A2-NRG1 fusion proteins are membrane-bound and display the NRG1 EGF-like domain extracellularly; KRAS mutation increases ADAM17 metalloprotease activity, which cleaves/sheds NRG1 from the SLC3A2-NRG1 fusion protein via KRAS-MEK-ERK signaling, enhancing ERBB2-ERBB3 phosphorylation and downstream PI3K/AKT/mTOR signaling even under oncogenic KRAS. MEK1/2 and ADAM17 inhibitors synergistically induce apoptosis. |
ADAM17 activity assays, MEK inhibitors, NRG1 shedding measurement, ERBB2/3 phosphorylation, xenograft and lung orthotopic tumor models |
Oncogene |
Medium |
34743207
|
| 2021 |
Stromal cancer-associated fibroblasts (CAFs) express NRG1 and signal paracrinally to luminal breast cancer cells to phosphorylate HER3 (ERBB3) and activate AKT and ERK1/2; simultaneously, NRG1 drives a HER3-independent pro-fibrotic and migratory phenotype in CAFs themselves. HAS2 (Hyaluronan Synthase 2) is identified as a targetable molecule strongly correlated with NRG1 in CAFs. |
CAF-conditioned medium, NRG1 neutralizing antibodies, siRNA knockdown, HER3 phosphorylation assays, CAF migration/invasion assays, transcriptomic profiling |
Oncogene |
Medium |
33692466
|
| 2021 |
NRG1/ErbB signaling controls dialogue between foxd3-positive neural crest-derived cells (NCdC) and macrophages during zebrafish fin regeneration; NCdC regulate macrophage recruitment and polarization through the NRG1/ErbB pathway, which is required for blastema formation. Chemical inhibition and transcriptomic analysis establish NRG1/ErbB pathway as the molecular link between NCdC and macrophage behavior during regeneration. |
Triple transgenic zebrafish live imaging, genetic NCdC depletion, NRG1/ErbB chemical inhibition, single-cell RNA sequencing, transcriptomic analysis |
Nature communications |
Medium |
34732706
|
| 2021 |
NFKB2 directly binds the promoter region of NRG1 and inhibits NRG1 transcription; in IL-1β-stimulated nucleus pulposus cells, NFKB2 is upregulated leading to NRG1 downregulation. NRG1 activates ErbB2/3 to sustain PI3K-AKT signaling protecting against degenerative changes; NFKB2 silencing attenuates degeneration via NRG1, and this effect is reversed by NRG1 silencing. |
ChIP for NFKB2 binding to NRG1 promoter, luciferase reporter assays, siRNA knockdown, ErbB2/3 and AKT phosphorylation assays, cell viability and apoptosis assays |
Mechanisms of ageing and development |
Medium |
34023356
|
| 2023 |
Nrg1 regulates cardiomyocyte-oriented cell division and trabeculae formation through endocardial Nrg1-to-myocardial ErbB2 signaling and phospho-ERK activation; early loss of Nrg1 reduces cardiomyocyte Pard3 and Crumbs2 polarity proteins, alters cytoskeletal actin gene expression, and shifts cardiomyocyte division orientation. Nrg1 is required for an EMT-like process in cardiomyocytes including migration, adhesion, and G2/M cell cycle progression. Ectopic Nrg1 overexpression causes S-phase arrest and prolonged trabeculation. Yap1 nuclear-cytoplasmic distribution is influenced by Nrg1 via pERK. |
Cardiac-specific Nrg1 knockout and overexpression, confocal imaging, transcriptomics, pERK and Pard3/Crumbs2 protein analysis, cell division orientation measurement, Yap1 nuclear-cytoplasmic localization imaging |
Circulation research |
High |
37846569
|
| 2023 |
In pancreatic ductal adenocarcinoma, cancer-associated fibroblasts (CAFs) secrete NRG1 which activates ERBB2 and ERBB3 on cancer cells as a KRAS*-independent survival mechanism. Genetic extinction or pharmacological inhibition of KRAS* upregulates ERBB2 and ERBB3 expression in cancer cells, prompting utilization of CAF-derived NRG1. Genetic depletion or pharmacological inhibition of ERBB2/3 or NRG1 abolishes KRAS bypass and synergizes with KRASG12D inhibitors. |
KRAS* conditional extinction, NRG1 genetic depletion in CAFs, ERBB2/3 pharmacological inhibition, KRASG12D inhibitor combination in mouse and human PDAC models |
Genes & development |
High |
37775182
|
| 2023 |
NRG1 fusions activate downstream signaling not only through HER2-HER3 heterodimers but also through HER4 independently of other HER family members, and through EGFR-HER3 signaling. Inhibition of HER4 and EGFR in addition to HER2/HER3 is necessary to effectively inhibit NRG1 fusion-driven tumor cell growth; pan-HER inhibition is more effective than selective targeting of HER2-HER3 or HER3 alone. |
Ba/F3 engineered cell lines with defined HER family member combinations, ERBB phosphorylation assays, cetuximab/trastuzumab/pertuzumab combination studies, in vitro and in vivo tumor growth assays with pan-HER TKIs |
Journal of thoracic oncology |
Medium |
37678511
|
| 2024 |
Adipocyte precursors secrete NRG1 which activates ERBB3 (HER3) signaling on urothelial and lung cancer cells in a paracrine manner, conferring resistance to FGFR inhibition (erdafitinib). NRG1 expression is significantly higher in adipocyte precursors than terminally differentiated adipocytes. NRG1 knockdown in adipocyte precursors abrogates resistance; pharmacological inhibition of the NRG1/HER3 axis with pertuzumab reverses erdafitinib resistance in vivo. |
Co-culture of adipocyte precursors and cancer cells, NRG1 knockdown in adipocyte precursors, ERBB3 phosphorylation assays, pertuzumab treatment, xenograft survival experiments, scRNA-seq |
Cancer research |
Medium |
38175774
|