| 2002 |
CTGF directly binds BMP4 and TGF-β1 through its cysteine-rich (CR) domain in the extracellular space. CTGF antagonizes BMP4 activity by preventing its binding to BMP receptors, while enhancing TGF-β1 receptor binding, thereby inhibiting BMP and activating TGF-β signals. |
Direct binding assays (co-immunoprecipitation, solid-phase binding), functional receptor competition assays, domain mutagenesis |
Nature cell biology |
High |
12134160
|
| 2008 |
CTGF directly binds BMP-7 with high affinity (Kd ~14 nM), inhibiting BMP-7 signal transduction (reduced pSmad1/5 and Id1 expression) in renal cells, contributing to diabetic nephropathy pathology. |
Co-immunoprecipitation, solid-phase binding assay, surface plasmon resonance (SPR), BMP-responsive element-luciferase assay, in vivo injection of CTGF in mice |
Journal of the American Society of Nephrology : JASN |
High |
18632843
|
| 2004 |
Endogenous CCN2 directly binds fibronectin and the fibronectin receptors integrins α4β1 and α5, as well as syndecan 4. Loss of CCN2 (Ccn2-/- mouse embryonic fibroblasts) impairs spreading on fibronectin, delays α-smooth muscle actin stress fiber formation, and reduces ERK and focal adhesion kinase phosphorylation. Heparan sulfate proteoglycans (HSPGs) and MEK/ERK cascade are required for fibroblast adhesion to CCN2. |
Co-immunoprecipitation, pulldown, Ccn2-/- mouse embryonic fibroblasts, ERK/FAK phosphorylation assays, cell spreading assays |
Molecular biology of the cell |
High |
15371538
|
| 2002 |
TGF-β-induced CTGF expression in mesangial cells requires SMAD signaling (mutation of a consensus SMAD binding element in the CTGF promoter abolished TGF-β-induced expression) and also requires Ras/MEK/ERK and PKC pathways; SMAD and Ras/MEK/ERK act synergistically and independently. |
CTGF promoter-reporter assays with SMAD binding element mutation, pharmacological inhibitors of MEK/ERK and PKC, mRNA and protein expression analysis |
Kidney international |
High |
12234285
|
| 2005 |
CTGF enhances TGF-β/Smad signaling in mesangial cells by transcriptionally suppressing Smad7 via induction of the transcription factor TIEG-1. This blocks the negative feedback loop of TGF-β signaling, enhancing Smad2/3 phosphorylation and nuclear translocation and increasing PAI-1 and collagen III expression. |
Antisense oligonucleotides against TIEG-1, SBE4-Luc reporter assay, Western blot for pSmad2/3, RT-PCR for target genes |
Experimental cell research |
Medium |
15950619
|
| 2012 |
CCN2 binds fibroblast growth factor receptors FGFR2 and FGFR3 (higher affinity for FGFR2), and enhances binding of FGF2 and FGF4 to FGFR2. CCN2 and FGF2 have a collaborative effect on ERK phosphorylation and osteoblast differentiation. |
Protein array screening, co-immunoprecipitation, solid-phase binding assay, SPR, ERK phosphorylation assay, osteoblast differentiation assay |
FEBS letters |
High |
23142580
|
| 2011 |
The C-terminal (CT) module of CCN2 directly binds FGF2 (Kd = 5.5 nM, measured by SPR). When combined with FGF2, the CT module abolishes FGF2-induced chondrocyte proliferation and MMP-9 and MMP-13 production by blocking FGF receptor 1 signaling (reducing ERK1/2, p38 MAPK, and JNK phosphorylation). Full-length CCN2 (but not CT alone) binds FGFR1 (Kd = 362 nM). |
Solid-phase binding assay, co-immunoprecipitation-Western blot, SPR, cell proliferation assay, MMP production assay, Western blot for signaling kinases |
Endocrinology |
High |
21914781
|
| 2012 |
CCN2 forms homotypic dimers (CCN2-CCN2) and heterotypic dimers with CCN3 (CCN2-CCN3) with dissociation constants of 1.17 nM and 1.95 nM respectively. CCN2 enhances aggrecan and col2a1 expression in chondrocytes, while CCN3 inhibits it; combined CCN2+CCN3 abolishes CCN3's inhibitory effect. An anti-VWC domain antibody (11H3) modulates these interactions. |
Yeast two-hybrid screening, co-immunoprecipitation in vitro and in vivo, surface plasmon resonance, fluorescence colocalization (GFP/Halo fusion), mRNA expression assays |
The FEBS journal |
High |
22812570
|
| 2016 |
CCN2 induces cellular senescence in fibroblasts through integrin α6β1-mediated accumulation of reactive oxygen species, leading to activation of p53 and induction of p16INK4a. Senescent cells express an anti-fibrotic SASP including upregulation of MMPs and downregulation of collagen. Application of purified CCN2 protein to cutaneous wounds induces senescent cells and reduces collagen content. |
In vitro CCN2 treatment of fibroblasts, integrin blocking antibodies, ROS measurement, p53/p16 activation assays, Ccn2 knockdown in vivo, purified CCN2 protein wound application |
Journal of cell communication and signaling |
Medium |
27752926
|
| 2010 |
The C-terminal (CT) domain of CCN2 is required for its pro-hypertrophic activity in cardiomyocytes. Deletion of the CT domain transforms CCN2 into a CCN5-like dominant negative molecule; fusion of the CT domain to CCN5 converts it to a pro-hypertrophic molecule. CCN2 overexpression in transgenic mice increases cardiac fibrosis and TGF-β-SMAD signaling in response to pressure overload. |
Domain deletion/fusion constructs in isolated cardiomyocytes, CCN2 transgenic mice with pressure overload, TGF-β-SMAD signaling assays |
Journal of molecular and cellular cardiology |
Medium |
20030435
|
| 2018 |
In cardiac fibrosis, CCN2 acts in an autocrine fashion: fibroblast-derived CCN2 (not cardiomyocyte-derived CCN2) mediates angiotensin II-induced cardiac fibrotic remodeling. Cell-type specific conditional deletion of CCN2 in activated fibroblasts inhibited fibrosis, while deletion from cardiomyocytes had no effect. |
Cell-type specific conditional CCN2 knockout mice (Cre-lox), angiotensin II-induced fibrosis model, in vitro fibroblast activation assays |
Journal of molecular and cellular cardiology |
High |
30040954
|
| 2018 |
In skeletal muscle, myofiber-derived CCN2 (not fibroblast-derived CCN2) mediates deleterious ECM remodeling and collagen organization in dystrophic (Sgcd-/- ) muscle. Myofiber-specific CTGF deletion protected against the dystrophic phenotype, while fibroblast-specific deletion did not. Muscle-specific CTGF overexpression altered collagen content and organization after injury without driving fibrosis. |
Conditional cell-type-specific Ctgf knockout mice (myofiber vs. fibroblast), muscle-specific Ctgf transgenic mice, dystrophic mouse model (Sgcd-/-), muscle regeneration and collagen organization assays |
FASEB journal |
High |
30216109
|
| 2008 |
TGF-β1-induced CCN2/CTGF expression in human gingival fibroblasts is mediated by Rac1 and Cdc42 (not RhoA). Dominant-negative Cdc42 or Rac1 dramatically reduced CCN2 protein levels. A geranylgeranyltransferase inhibitor blocked CCN2 induction independently of JNK1. Combination of lovastatin (inhibiting Rho-GTPase geranylgeranylation) and forskolin reduced CCN2 mRNA and protein by >90%. |
Dominant-negative Rho-GTPase overexpression, geranylgeranyltransferase inhibitor, JNK1 phosphorylation assays, mRNA and protein expression analysis |
The Journal of biological chemistry |
Medium |
18287089
|
| 2013 |
Reducing CTGF availability in mdx mice (hemizygous Ctgf deletion or anti-CTGF neutralizing antibody FG-3019) reduced muscular dystrophy severity, improved muscle strength, reduced fibrosis and apoptotic damage, without affecting TGF-β, pERK1/2 or p38 signaling. Reduced CTGF also improved engraftment of dystrophin-positive satellite cells. |
Ctgf+/- mdx genetic model, anti-CTGF monoclonal antibody (FG-3019) treatment, exercise endurance tests, isolated muscle strength assays, histology for fibrosis/apoptosis, satellite cell transplantation |
Human molecular genetics |
High |
23904456
|
| 2014 |
CTGF negatively regulates BMP-2-induced osteoblast differentiation and Smad1/5/8 phosphorylation. CTGF knockout osteoblasts show enhanced BMP-2-induced differentiation with increased pSmad1/5/8 and BMP receptor Ib expression; conversely, adenoviral CTGF overexpression decreases osteoblast maturation and pSmad1/5/8 in BMP-2-stimulated cultures. |
CTGF knockout mouse osteoblast cultures, adenoviral CTGF overexpression, BMP-2 stimulation, Smad1/5/8 phosphorylation assays, osteoblast differentiation/mineralization assays |
Journal of cellular physiology |
Medium |
24127409
|
| 2013 |
CCN2/CTGF is required for matrix organization and protection of growth plate chondrocytes from ER stress. Ccn2-/- chondrocytes exhibit enlarged endoplasmic reticula; CCN2 mediates chondrocyte survival through integrin α5 and promotes NFκB expression and autophagy pathway components. CCN2 overexpression in transgenic mice reduces chondrocyte stress. |
Ccn2-/- mouse growth plates, CCN2-overexpressing transgenic mice, immunofluorescence for ER stress markers, integrin α5 blocking, NFκB expression assays, autophagy pathway analysis |
Journal of cell communication and signaling |
Medium |
23666466
|
| 2020 |
CTGF is expressed by endothelial cells in the developing retinal vasculature. Endothelial cell-specific or global CTGF deletion impairs vascular cell growth, morphogenesis, and blood barrier function. CTGF regulates YAP expression, and re-expression of YAP partially rescues angiogenesis and barriergenesis in CTGF mutant retinas, establishing a CTGF-YAP regulatory loop. |
Endothelial cell-specific and global Ctgf knockout mice, retinal vascular morphogenesis assays, YAP re-expression rescue experiments, blood-retinal barrier assays |
iScience |
High |
32502964
|
| 2020 |
The CT domain of CTGF/CCN2 directly binds to the third beta-propeller domain of LRP4. CTGF enhances LRP4-MuSK binding and LRP4 plasma membrane localization, facilitates agrin-induced MuSK phosphorylation, and promotes AChR clustering in myotubes. Ctgf-/- embryos have small AChR clusters, abnormal synaptic vesicle dispersion, reduced active zones, fewer mitochondria in presynaptic terminals, and impaired NMJ signal transmission. |
Direct binding assay (CT domain to LRP4), co-immunoprecipitation, Ctgf-/- mouse embryo analysis, AChR clustering assay in myotubes, ultrastructural analysis, NMJ electrophysiology |
EMBO reports |
High |
32558157
|
| 2006 |
SGK1 is required for mineralocorticoid (DOCA)-induced CTGF expression and cardiac fibrosis. DOCA enhanced CTGF expression and promoter activity in sgk1+/+ but not sgk1-/- lung fibroblasts, an effect involving spironolactone-sensitive mineralocorticoid receptors and NF-κB activation. sgk1-/- mice did not develop cardiac fibrosis under DOCA/high-salt treatment. |
SGK1 knockout mice, DOCA/high-salt treatment model, CTGF promoter-reporter assay, Western blot, pharmacological inhibition with spironolactone and NF-κB inhibitors |
Journal of molecular medicine |
Medium |
16604333
|
| 2014 |
CCN2 promotes resistance to cisplatin-induced apoptosis in osteosarcoma cells through upregulation of Bcl-xL and survivin, and by activating FAK, MEK, and ERK survival signaling pathways. CCN2 knockdown by shRNA increased the therapeutic effect of cisplatin in vitro and in a mouse xenograft model. |
CCN2 overexpression/shRNA knockdown in osteosarcoma cells, Bcl-xL/survivin knockdown experiments, FAK/MEK/ERK phosphorylation assays, mouse xenograft model |
PloS one |
Medium |
24637722
|
| 2017 |
CTGF promotes angiopoietin 2 (Angpt2) expression and angiogenesis in osteosarcoma via the PLC/PKCδ signaling pathway. CTGF negatively regulates endogenous miR-543 via PLC/PKCδ, and miR-543 targets Angpt2 mRNA, establishing a CTGF→PLC/PKCδ→miR-543→Angpt2 axis mediating tumor angiogenesis. |
CTGF overexpression in osteosarcoma cells, PLC/PKCδ inhibitors, miR-543 overexpression/knockdown, in vitro and in vivo angiogenesis assays, luciferase reporter for miR-543/Angpt2 interaction |
Cancer letters |
Medium |
28108312
|
| 2014 |
Loss of CCN2 in melanoma cells or fibroblasts impedes melanoma invasion. Fibroblast-derived CCN2 promotes melanoma metastasis to lungs in vivo. CCN2-deficient melanoma cells show reduced periostin expression; addition of recombinant periostin rescues the invasion defect, placing CCN2 upstream of periostin in the invasion pathway. |
Fibroblast-specific Ccn2 knockout mice (syngeneic melanoma model), CCN2 knockdown in B16(F10) cells, in vitro collagen invasion assay, in vivo spontaneous metastasis assay, recombinant periostin rescue experiment |
The Journal of investigative dermatology |
Medium |
26168233
|
| 2022 |
CCN2/CTGF promotes liver fibrosis through crosstalk with the Slit2/Robo signaling pathway. CTGF and its truncated mutant (first three domains) interact with the 7th-9th EGF repeats and CT motif of Slit2 in HSC and fibrotic liver. CTGF upregulates Slit2, promotes HSC activation, and CCN2/Slit2 synergistically activate PI3K/AKT in primary HSC. Soluble Robo1-Fc chimera inhibits these activities. Conditional CCN2 KO reduced Slit2, α-SMA, and Collagen type I. |
Tamoxifen-inducible conditional Ccn2 KO mice, hepatocyte-specific Ccn2 KO rats (Cre-lox), co-immunoprecipitation of CTGF with Slit2 in cultured HSC and fibrotic liver, PI3K/AKT activation assays, Robo1-Fc inhibition experiments |
Journal of cell communication and signaling |
Medium |
36469291
|
| 2021 |
Dysregulation of PI3K and Hippo signaling (PTEN and SAV1 loss) induces chronic pancreatitis via CTGF upregulation. CEBPA knockdown in pancreatic acinar cells reduced PTEN and SAV1 and increased CTGF, inducing acinar-to-ductal metaplasia and activating macrophages and stellate cells—effects mitigated by CTGF inhibition. CP in double KO mice was ameliorated by Ctgf gene deletion or antibody-mediated CTGF neutralization. |
Pancreas-specific Pten/Sav1 double KO mice, Ctgf gene deletion, anti-CTGF antibody neutralization, CEBPA knockdown in pancreatic acinar cells, co-culture activation assays |
The Journal of clinical investigation |
High |
34032634
|
| 2021 |
CTGF facilitates gap junction intercellular communication (GJIC) in chondrocytes by upregulating connexin 43 (Cx43) expression through activation of PI3K/Akt signaling (promoting Akt phosphorylation and translocation). siRNA-mediated CTGF knockdown reduced Cx43, and PI3K/Akt inhibition impaired CTGF-enhanced GJIC. |
CTGF treatment of chondrocytes, siRNA knockdown of CTGF, PI3K/Akt inhibition, Western blot for Cx43 and pAkt, scrape loading/dye transfer assay for GJIC |
Cell proliferation |
Medium |
33522639
|
| 2014 |
CCN2 knockdown in osteosarcoma cells blocked Smad1, ERK1/2, and MMP2 activation. CTGF knockdown by siRNA inhibited osteosarcoma cell migration in vitro and lung metastasis in vivo. CTGF and Smad1 were confirmed as direct targets of miR-26b by luciferase reporter assay (binding to 3'-UTR of CTGF mRNA). |
siRNA knockdown of CTGF, luciferase reporter assay with CTGF 3'-UTR, phospho-Smad1/ERK1/2/MMP2 assays, migration assay, in vivo lung metastasis model |
Tumour biology |
Medium |
25761878
|
| 2018 |
In bovine blastocysts, TEAD4 regulates CCN2 expression in trophectoderm (TE). CCN2 knockdown reduces CDX2, GATA2, and TEAD4 expression and decreases TE-to-ICM cell ratio, demonstrating a reciprocal TEAD4-CCN2 regulatory loop essential for TE development. |
siRNA-mediated TEAD4 and CCN2 knockdown in bovine blastocysts, immunofluorescence, mRNA expression analysis, cell number counting |
Reproduction (Cambridge, England) |
Medium |
29661794
|
| 2016 |
miR-133b directly targets the 3'-UTR of CTGF mRNA (confirmed by dual-luciferase assay), suppressing CTGF expression. miR-133b overexpression reduces ovarian cancer cell migration and invasion; co-transfection with CTGF overexpression plasmid rescues the mesenchymal phenotype (EMT markers) and invasive capacity. |
Dual-luciferase reporter assay with CTGF 3'-UTR, miR-133b transfection, CTGF rescue overexpression, Western blot for EMT markers, Transwell invasion assay |
European review for medical and pharmacological sciences |
Medium |
29271992
|
| 2016 |
miR-19a, miR-19b, and miR-26b directly bind the 3'-UTR of CTGF mRNA (verified by luciferase assay) and suppress CTGF expression. ET-1 and thrombin reduce these miRNA levels via MAPK activation, leading to CTGF upregulation and fibroblast differentiation (α-SMA, vimentin expression). Intratracheal delivery of these miRNAs reduced pulmonary fibrosis in bleomycin-treated mice. |
Luciferase reporter assay with CTGF 3'-UTR, miRNA overexpression, MAPK inhibitors, in vivo bleomycin pulmonary fibrosis model with miRNA delivery |
Journal of cellular physiology |
Medium |
26873752
|
| 2014 |
CCN2 knockdown in nasopharyngeal carcinoma cells activates FAK/PI3K/AKT signaling and downstream EMT and MMP pathways, promoting cell proliferation, migration, invasion, and G1/S cell cycle transition, suggesting that CTGF normally suppresses these pathways in NPC. |
CTGF knockdown by siRNA in NPC cells, FAK/PI3K/AKT phosphorylation assays, cell cycle analysis, migration/invasion assays, colony formation assay |
PloS one |
Medium |
23755163
|
| 2011 |
Mechanical tension (cyclical strain) induces CCN2 expression in gingival fibroblasts through rapid activation of latent TGFβ (in a FAK/src- and blebbistatin-sensitive manner) and induction of endothelin-1 (ET-1). Pharmacological inhibition of ALK5, endothelin A/B receptors, and FAK/src significantly reduced strain-induced CCN2 expression. |
Flexercell cyclical strain system, pharmacological inhibitors (ALK5/TGFβRI inhibitor, endothelin receptor antagonist, FAK/src inhibitor, blebbistatin), mRNA and protein expression assays |
PloS one |
Medium |
21611193
|
| 2014 |
YY1 (Yin Yang 1) transcriptionally regulates both Bmp7 (positively) and Ctgf (negatively) in cardiomyocytes. Combined upregulation of Bmp7 and Ctgf silencing synergistically suppressed dilated cardiomyopathy and cardiac fibrosis by inhibiting TGF-β/Smad signaling and reducing CD3+ T cell infiltration in DCM hearts. |
YY1 overexpression, Ctgf silencing (shRNA), Bmp7 knockdown, Bmp7/Ctgf reporter assays in cardiomyocytes, Lmna DCM mouse model, TGF-β/Smad signaling assays, histology |
Circulation research |
Medium |
31495264
|
| 2014 |
CCN2 promotes osteosarcoma cell invasion via periostin. CCN2-deficient cells showed reduced periostin expression and impaired collagen invasion in vitro; recombinant periostin rescued the invasion defect, establishing CCN2→periostin as a pro-invasive axis. |
CCN2 knockdown in B16(F10) and osteosarcoma cells, in vitro collagen invasion assay, recombinant periostin rescue, immunohistochemistry |
The Journal of investigative dermatology |
Medium |
26168233
|
| 2017 |
CTGF expression in V600EBRAF melanoma cells depends on ERK1/2 activity (not NF-κB activity), as demonstrated by simultaneous inhibition of NF-κB activity and induction of ERK1/2 phosphorylation experiments; vemurafenib and trametinib (ERK1/2 pathway inhibitors) significantly reduced CTGF expression. |
Pharmacological inhibition of NF-κB and ERK1/2, vemurafenib/trametinib treatment, qRT-PCR and Western blot for CTGF |
Laboratory investigation |
Low |
28067893
|
| 2001 |
CTGF mRNA expression in osteocytes and osteoblasts in alveolar bone is rapidly upregulated (within 12 hours) in response to experimental tooth movement (mechanical stimulation), both near the periodontal ligament and deep in bone matrix on both tension and compression sides, indicating a role for CTGF in osteocyte mechanotransduction. |
In situ hybridization for CTGF mRNA in alveolar bone during experimental tooth movement in rats |
Journal of dental research |
Low |
11332533
|
| 2014 |
Compressive force loading increases CCN2 gene expression and protein production in osteocytes, inducing apoptosis through ERK1/2 activation. Exogenous CCN2 protein caused ERK1/2 activation and apoptosis; a neutralizing CCN2 antibody blocked loading-induced ERK1/2 activation and apoptosis. |
Compressive force loading of osteocytes in vitro, exogenous CCN2 protein treatment, anti-CCN2 neutralizing antibody, ERK1/2 phosphorylation assays, apoptosis assays |
Journal of bone and mineral research |
Medium |
24155087
|