| 1993 |
The EMS1 gene encodes an 80/85-kDa protein (cortactin) that is homologous (85%) to a chicken v-src substrate. In epithelial cells, the protein localizes mainly in the cytoplasm, but in carcinoma cells overexpressing EMS1 due to gene amplification, it accumulates in podosome-like adherens junctions at cell-substratum contact sites (but not intercellular adherens junctions), suggesting a role in regulating interactions between components of adherens-type junctions. |
Amino acid sequence comparison, immunocytochemistry |
Molecular and cellular biology |
Medium |
8474448
|
| 1998 |
Cortactin (EMS1) contains an F-actin binding tandem repeat domain, a proline-rich SH3-binding region, and a C-terminal SH3 domain, supporting its function in signal transmission between cell-matrix contact sites and the cytoskeleton. Both human p80 and p85 isoforms are encoded by the EMS1 cDNA. |
Gene transfer experiments, sequence analysis, Western blot, antiserum characterization |
Cell adhesion and communication |
Medium |
9823470
|
| 1998 |
Overexpression of cortactin (EMS1) in NIH3T3 fibroblasts increases cell motility and invasion in modified Boyden chamber assays without affecting proliferation or anchorage dependence, establishing a direct role of cortactin overexpression in cell migration and invasion. |
Stable overexpression in NIH3T3 cells, Boyden chamber migration and invasion assays |
Oncogene |
Medium |
9681820
|
| 1999 |
EGF treatment or cell detachment induces an 80–85 kDa mobility shift of EMS1 (cortactin) correlated with increased serine/threonine phosphorylation, and this shift is blocked by the MEK inhibitor PD98059 and mimicked by constitutively active MEK. ERKs are candidate kinases for this phosphorylation, occurring in the helical-proline-rich region, which is required for the phosphorylation event. |
In vitro kinase assays, MEK inhibitor treatment (PD98059), constitutively active MEK expression, deletion mutagenesis, metabolic phospholabeling |
Cancer research |
High |
10537323
|
| 1996 |
EMS1 (cortactin) is tyrosine phosphorylated in breast cancer cell lines, and the degree of tyrosine phosphorylation correlates with src-family kinase activity, identifying src-family kinases as candidate tyrosine kinases for cortactin phosphorylation. |
Western blotting, tyrosine phosphorylation analysis, src-family kinase activity assays |
International journal of cancer |
Medium |
8945620
|
| 2006 |
siRNA-mediated silencing of CTTN in ESCC cells reduces cell migration, invasiveness, and anoikis resistance, and the protective role of CTTN in anoikis resistance is correlated with activation of the PI3K/Akt pathway. In vivo, inhibition of CTTN decreases tumor growth and lung metastasis. |
siRNA knockdown, cell migration assay, anoikis resistance assay, PI3K/Akt pathway analysis, in vivo xenograft |
Cancer research |
High |
17178864
|
| 2008 |
Cortactin (CTTN) and N-WASP (WASL), two regulators of actin network assembly known to be components of podosomes, are concentrated at tubulobulbar complexes in the rat testis seminiferous epithelium, which are podosome-like structures proposed to internalize junctions during sperm release. |
Immunofluorescence microscopy, immunoelectron microscopy of fixed rat testis |
Biology of reproduction |
Medium |
18799755
|
| 2009 |
STAT3 directly binds to the CTTN promoter as shown by chromatin immunoprecipitation assay, upregulating CTTN mRNA expression. Calreticulin (CRT) regulates anoikis resistance and cell motility through a CRT-STAT3-CTTN-PI3K-Akt signaling axis in ESCC cells. |
siRNA knockdown, ChIP assay, JAK inhibitor treatment, CTTN rescue experiments, cell migration/invasion assays |
Oncogene |
High |
19684620
|
| 2019 |
RNF128, an E3 ubiquitin ligase, ubiquitinates and degrades CTTN (cortactin); its downregulation leads to CTTN accumulation and activation of Wnt/β-catenin signaling, promoting EMT and stemness in melanoma cells. |
siRNA knockdown, ubiquitination assays, Wnt pathway analysis, functional cell assays |
Journal of hematology & oncology |
Medium |
30832692
|
| 2020 |
UCHL1 (a deubiquitinase) interacts with CTTN and promotes its degradation via K48-linked ubiquitination, and restoration of CTTN rescues UCHL1-mediated suppression of NPC cell migration and invasion, identifying UCHL1 as a writer/eraser for CTTN ubiquitination. |
Co-IP, ubiquitination assay (K48-linked), CTTN rescue experiments, migration/invasion assays |
Cells |
Medium |
32120844
|
| 2022 |
The CTTN coding SNP Ser484Asn (rs56162978) delays endothelial cell (EC) barrier recovery following thrombin-induced permeability, reduces Tyr486 cortactin phosphorylation, inhibits binding to nmMLCK (a cytoskeletal regulator), and attenuates lamellipodia dynamics. Cttn+/- mice show increased lung vascular permeability after ARDS challenge, reversed by WT CTTN but not S484N CTTN transgene delivery. |
EC transgene expression, thrombin permeability assay, phosphorylation analysis, Co-IP (nmMLCK binding), biophysical measurements, mouse lung vascular permeability model, liposomal gene delivery |
Translational research |
High |
35181549
|
| 2022 |
CBLC (an E3 ubiquitin ligase) interacts with CTTN in the cytoplasm and promotes CTTN degradation through the ubiquitin-proteasome pathway, inhibiting breast cancer cell proliferation, migration, and invasion. The inhibitory effect of CBLC is partially reversed by CTTN overexpression. |
Co-IP, immunofluorescence co-localization, proteasome inhibitor assay, CTTN rescue experiments |
Journal of receptor and signal transduction research |
Medium |
36043996
|
| 2024 |
YWHAG (14-3-3γ) interacts with CTTN and mediates its tumor-promoting functions by activating Wnt/β-catenin signaling in colorectal cancer cells, promoting proliferation, migration, and invasion. |
Co-IP, RNA-seq, Wnt pathway analysis, functional cell assays |
Medical oncology |
Low |
38538804
|
| 2024 |
CTTN is required for matrix stiffness-induced cell migration, invasion, and invadopodia formation in NPC cells. The splicing factor PTBP2, activated by high stiffness, promotes expression of the WT-CTTN isoform over splice variants (SV1, SV2), and WT-CTTN is the functional form driving these malignant behaviors. |
siRNA knockdown, overexpression of WT/splice variant CTTN, matrix stiffness manipulation, invasion/migration assays, invadopodia formation assays |
Cancer science |
Medium |
38273817
|
| 2025 |
RBMS1 promotes splicing of CTTN to generate a CTTN-Δe11 isoform, which activates the PI3K/AKT signaling pathway, leading to cytoskeleton and sarcomere damage in cardiomyocytes and contributing to cardiac hypertrophy. |
RNA-binding protein overexpression/knockdown, splicing isoform analysis, PI3K/AKT pathway measurement, cardiomyocyte functional assays, pharmacological inhibition |
EMBO molecular medicine |
Medium |
41214391
|
| 2025 |
In HNSCC cells, CTTN knockdown reduces FAK expression and impairs cytoskeletal formation, diminishing anti-apoptotic (anoikis-resistance) capacity. CTTN silencing significantly suppressed growth in patient-derived organoids (PDOs). |
CTTN knockdown, PI staining, immunofluorescence, Western blot, patient-derived organoid assays |
Scientific reports |
Medium |
41168318
|
| 2025 |
Cortactin localizes to Rab7-positive late endosomes and participates in late endosomal tethering and homeostasis. Depletion of cortactin causes accumulation of enlarged Rab7/mTOR-positive late endosomal aggregates, leading to mTOR activation and p53 phosphorylation (S15 and S33), driving G0/G1 arrest and cellular senescence (OIS) in circulating tumor cells. A positive feedback loop between p53 and mitochondrial ROS maintains stable senescence. |
Live-cell imaging, patient-derived CTC lines, CDX animal models, cortactin depletion, endosomal marker co-localization, mTOR/p53 pathway analysis, senescence assays (β-gal, Ki-67, Lamin B1, SASP, mtROS) |
bioRxivpreprint |
Medium |
bio_10.1101_2025.03.26.645381
|
| 2011 |
Cortactin expression is required for optimal endocytosis in colon cancer cells; siRNA silencing of CTTN reduces transferrin uptake, and domain deletion mutants of cortactin fail to support endocytosis, indicating an intact cortactin molecule is necessary for clathrin-coated vesicle transport. |
siRNA knockdown, DNA transfection with domain deletion mutants, transferrin endocytosis assay, immunohistochemistry, Western blot |
Zhonghua yi xue za zhi |
Medium |
21418910
|
| 2025 |
LAD1 specifically binds to LINC01305 and co-regulates the phosphorylation levels of CTTN and N-WASP, mediating cytoskeletal reorganization and promoting ESCC cell metastasis, with LINC01305/LAD1 activating PI3K/AKT signaling. |
Co-IP, phosphorylation analysis, cell migration/invasion assays, PI3K/AKT pathway analysis |
Molecular carcinogenesis |
Low |
39835575
|
| 2019 |
HBx (Hepatitis B virus X protein) interacts with CTTN (cortactin), as validated by co-immunoprecipitation and confocal microscopy, and regulates CTTN expression. The HBx-CTTN interaction enhances cell proliferation and migration by upregulating CREB1 and its downstream targets cyclin D1 and MMP-9. |
Co-immunoprecipitation, confocal microscopy, cell proliferation/migration assays, CREB1/downstream target analysis |
Cell death & disease |
Medium |
31138777
|
| 2024 |
LPS, TNF-α, and pathological cyclic stretch (18%CS) increase CTTN promoter activity in a time-dependent manner, mediated at least partly through NF-κB response elements. HIF pathway activation and NRF2 modulation also regulate CTTN promoter activity. A promoter SNP (rs34612166, -212T/C) markedly enhances LPS- and CS-induced CTTN promoter activation. |
CTTN promoter-luciferase reporter assays, site-directed mutagenesis of promoter SNPs, chemical inhibitors of HIF/NRF2/NF-κB, in vivo LPS mouse model with IHC |
Bioscience reports |
Medium |
39162263
|
| 2025 |
Nuclear miR-124-3p promotes Cttn transcription (not post-transcriptional silencing) by targeting the Cttn promoter via an importin/Ago1/2-dependent mechanism, and Cttn is required for neurite outgrowth and growth cone formation after spinal cord injury. |
RNA immunoprecipitation, RNA pull-down, ChIP assay, siRNA knockdown, cDNA overexpression, neurite outgrowth assays in PC12 cells, in vivo rat SCI model |
Molecular neurobiology |
Medium |
40044957
|