| 1999 |
MT4-MMP (MMP17) is a GPI-anchored proteinase — the first GPI-anchored member of the MMP family. [3H]ethanolamine labeling incorporated into the GPI unit in a sequence-dependent manner, and phosphatidylinositol-specific phospholipase C treatment released MT4-MMP from the cell surface of transfected cells. MT4-MMP is also shed from the cell surface by an endogenous metalloproteinase. |
Metabolic labeling with [3H]ethanolamine, PI-PLC treatment of transfected cells, cell surface release assay |
The Journal of biological chemistry |
High |
10567400
|
| 2000 |
Mouse MT4-MMP catalytic domain has TNF-alpha convertase activity: it efficiently cleaves a peptide spanning the pro-TNFα cleavage site, cleaves a GST-pro-TNFα fusion protein in vitro, and sheds pro-TNFα when co-transfected in COS-7 cells. However, it does not activate pro-MMP2 and shows very limited activity against ECM components except fibrinogen and fibrin. Catalytic activity is inhibited by TIMP-1, -2, and -3. |
E. coli expression/refolding of recombinant catalytic domain, synthetic peptide cleavage assay, GST-fusion protein cleavage, co-transfection shedding assay in COS-7 cells, TIMP inhibition assay |
The Journal of biological chemistry |
High |
10799478
|
| 1999 |
The originally reported human MT4-MMP cDNA (Puente et al. 1996) lacked the full ORF and failed to express protein. A new major transcript with an extended open reading frame was identified by 5' RACE and encodes 67 and 71 kDa translation products — the functional MT4-MMP protein. |
5' RACE, cDNA cloning, protein expression in transfected cells (Western blot) |
FEBS letters |
Medium |
10471807
|
| 2000 |
MT4-MMP expressed in COS-7 cells localizes to the cell surface but does not activate pro-MMP2, distinguishing it functionally from MT1-, MT2-, and MT3-MMP. |
COS-7 cell transfection, cell-surface expression assay, pro-MMP2 activation assay |
The Journal of biological chemistry |
Medium |
10799478
|
| 2006 |
The hemopexin domain of MT4-MMP, when substituted into MT1-MMP chimeras, blocks propeptide processing, prevents trafficking to the plasma membrane (retained in ER), and abolishes pro-MMP2 activation and gelatin degradation. The MT4-MMP hemopexin domain therefore carries an intrinsic inhibitory signal for enzyme maturation and trafficking. |
MT1-MT4-MMP chimera construction, cell-surface biotinylation, indirect immunofluorescence, pro-MMP2 activation assay, gelatin degradation assay |
The Biochemical journal |
High |
16686598
|
| 2007 |
In vivo, MT4-MMP is expressed primarily in cerebrum, lung, spleen, intestine and uterus; specifically in neurons (cerebrum), smooth muscle cells (intestine, uterus), and macrophages (lung alveolar/intraperitoneal space). LPS-induced TNF-α release from MT4-MMP-null macrophages was not different from wild-type, and MT4-MMP mRNA was repressed by LPS stimulation — arguing against a dominant role as a TNFα sheddase in macrophages in vivo. |
MT4-MMP KO mouse with LacZ reporter, β-galactosidase staining, RT-PCR, TNF-α release assay from macrophages |
Genes to cells : devoted to molecular & cellular mechanisms |
Medium |
17825051
|
| 2005 |
MT4-MMP is required for IL-1-induced aggrecanolysis in bovine cartilage explants. Blocking GPI-anchor synthesis with mannosamine (inhibiting MT4-MMP membrane anchoring) blocked IL-1-mediated aggrecan cleavage, MT4-MMP induction, and ADAMTS4 processing (p68→p53 conversion and release). This supports MT4-MMP-mediated processing of resident ADAMTS4 as the mechanism of aggrecanolysis. |
Bovine cartilage explant treatment with IL-1, Western blot for aggrecan fragments, MT4-MMP, and ADAMTS4, mannosamine GPI-anchor inhibition, esculetin MMP inhibition |
Osteoarthritis and cartilage |
Medium |
15780640
|
| 2012 |
The proteolytic activity of MT4-MMP is required for its pro-angiogenic and pro-metastatic effects in breast cancer. Glutamic acid 249→Alanine active-site mutation abolished the MT4-MMP-induced angiogenic switch, tumor growth acceleration, and lung colonization. Tumor-derived (not host-derived) MT4-MMP drives angiogenesis; MT4-MMP-deficient host mice were unaffected. |
Site-directed mutagenesis (E249A), subcutaneous tumor implantation in RAG1-deficient mice, MT4-MMP-null mouse host experiments, tumor growth and lung colonization assays |
International journal of cancer |
High |
22262494
|
| 2014 |
MT4-MMP directly associates with EGFR at the cell surface and enhances EGFR phosphorylation in response to TGFα and EGF, driving cancer cell proliferation through CDK4 activation and retinoblastoma protein inactivation. These effects on proliferation and EGFR activation do not require MT4-MMP metalloprotease activity. |
Co-immunoprecipitation, EGFR phosphorylation assays, cell proliferation assays, CDK4/Rb pathway analysis, catalytic mutant comparison |
Cancer research |
Medium |
25320013
|
| 2015 |
MMP17/MT4-MMP cleaves osteopontin, and this cleavage regulates vascular smooth muscle cell maturation via c-Jun N-terminal kinase (JNK) signaling during aorta wall development. Loss of Mmp17 in mice results in dysfunctional VSMCs and altered ECM, leading to increased susceptibility to angiotensin-II-induced thoracic aortic aneurysm. Re-expression of catalytically active Mmp17 or the N-terminal osteopontin fragment rescued part of the vessel-wall phenotype. |
Mmp17 knockout mouse model, angiotensin-II-induced aneurysm model, lentiviral re-expression of active Mmp17 or osteopontin fragment, JNK signaling analysis, human patient mutation (R373H) blocking expression |
Circulation research |
High |
25963716
|
| 2016 |
MT4-MMP forms homophilic complexes (oligomers and dimers) at the cell surface. It is internalized via the clathrin-independent carriers/GPI-enriched early endosomal compartments (CLIC/GEEC) pathway into early endosomes, where it is either autodegraded or recycled to the cell surface. Internalization was reduced by CDC42 or RhoA siRNA silencing but not by caveolin-1 or clathrin pathway inhibitors. |
Co-immunoprecipitation of FLAG- and Myc-tagged MT4-MMP, reducing/non-reducing immunoblotting, antibody feeding assay with confocal microscopy, cell surface biotinylation/Western blot, siRNA knockdown of CDC42/RhoA/caveolin-1 |
The FEBS journal |
Medium |
26663028
|
| 2017 |
MT4-MMP in melanoma cells is processed by furin cleavage in the Golgi apparatus. The 69 kDa form is the intracellular precursor and the 58 kDa form is the mature protein present at the cell membrane. Asn318 was identified as the single N-glycosylation site of MT4-MMP. |
Iodixanol gradient organelle fractionation, glycosidase treatment, site-directed mutagenesis of N-glycosylation sites, Western blotting |
Cellular physiology and biochemistry |
Medium |
28531887
|
| 2018 |
MT4-MMP deficiency in mice increases adhesion of patrolling monocytes to inflamed endothelia, elevates Mafb+AIM+ macrophage accumulation at early atherosclerotic lesions, and accelerates atherosclerosis. MT4-MMP-null Mafb+AIM+ macrophages show higher AIM and CD36 expression, increased resistance to apoptosis, and avid acLDL binding. CCR5 inhibition blocks the enhanced recruitment of MT4-MMP-null patrolling monocytes and alleviates atherosclerosis acceleration. |
MT4-MMP KO mouse crossed to atherosclerosis model, intravital microscopy, flow cytometry, peritoneal macrophage functional assays (apoptosis, acLDL binding), CCR5 inhibitor treatment |
Nature communications |
High |
29500407
|
| 2019 |
MT4-MMP promotes invadopodia formation and amoeboid-like cell movement in head and neck cancer cells. Mechanistically, MT4-MMP binds Tks5 and PDGFRα, leading to Src activation (invadopodia), and stimulates Rho and Cdc42 GTPases (amoeboid movement). MT4-MMP expression increased gelatin degradation in 3D assays. |
MT4-MMP overexpression in FaDu cells, 3D collagen/gelatin invasion assays, co-immunoprecipitation of MT4-MMP with Tks5 and PDGFRα, Src/Rho/Cdc42 activity assays |
Biochemical and biophysical research communications |
Medium |
31813546
|
| 2021 |
MMP17, exclusively expressed by smooth muscle cells in the intestine, is required for intestinal epithelial repair after inflammation- or irradiation-induced injury. MMP17 affects intestinal epithelial reprogramming indirectly by cleaving the matricellular protein PERIOSTIN, and smooth muscle-derived MMP17 promotes BMP antagonist supply essential for intestinal stem cell maintenance and YAP activity. |
Mmp17 KO mouse, intestinal injury models (inflammation, irradiation), intestinal organoid assays, PERIOSTIN cleavage assay, YAP activity analysis, single-cell/cell-type-specific expression analysis |
Nature communications |
High |
34795242
|
| 2023 |
MMP17 expressed in smooth muscle cells and lamina propria macrophages of the intestine extrinsically regulates goblet cell maturation. Mmp17 KO mice show elevated goblet-cell-associated genes (CLCA1, RELM-β) and increased resistance to low-dose Trichuris muris helminth infection. The mechanism does not appear to involve NOTCH pathway changes or altered cytokine levels. |
Mmp17 KO mouse, helminth (T. muris) infection model, Citrobacter rodentium infection model, gene/protein expression analysis of goblet cell markers |
Frontiers in immunology |
Medium |
37869014
|