Expression of Matrix Metalloproteinases and Tissue Inhibitors of Metalloproteinases in Human Pancreatic Adenocarcinomas: Clinicopathologic and Prognostic Significance of Matrilysin Expression

2001 ◽  
Vol 19 (4) ◽  
pp. 1118-1127 ◽  
Author(s):  
Hiroyuki Yamamoto ◽  
Fumio Itoh ◽  
Shouhei Iku ◽  
Yasushi Adachi ◽  
Hiroshi Fukushima ◽  
...  
Keyword(s):  
Overall Survival ◽  
Matrix Metalloproteinases ◽  
Pancreatic Carcinoma ◽  
Prognostic Significance ◽  
Carcinoma Cells ◽  
Tissue Inhibitors Of Metalloproteinases ◽  
Invasive Front ◽  
Clinicopathologic Characteristics ◽  
Tissue Inhibitors

PURPOSE: A disruption in the balance between the matrix metalloproteinases (MMPs) and their natural inhibitors, tissue inhibitors of metalloproteinases (TIMPs), has been implicated in the progression of many types of cancer. The aim of this study was to determine whether a specific MMP or TIMP has clinicopathologic and prognostic significance in pancreatic carcinoma. PATIENTS AND METHODS: Using immunohistochemistry, we analyzed 70 pancreatic ductal adenocarcinoma tissues for expression of MMP-1, MMP-2, MMP-3, MMP-7 (matrilysin), MMP-9, MT1-MMP, TIMP-1, and TIMP-2. The results were matched with clinicopathologic characteristics and patients’ survival. The effects of the suppression of a specific MMP on in vitro invasiveness of pancreatic carcinoma cells were also examined. RESULTS: Expression of MMP-1, MMP-2, MMP-3, matrilysin, MMP-9, MT1-MMP, TIMP-1, and TIMP-2 was detected in either tumor cells or tumor stromal cells, or in both components, at varying frequencies. Among MMPs, matrilysin showed a unique distribution in the tumor nests; its expression was usually most pronounced at the invasive front of the tumors. Sections with immunostaining signals in more than 30% of carcinoma cells at the invasive front, which were observed in 40 cases (57%), were judged to be positive for matrilysin. Matrilysin positivity was significantly correlated with pT, pN, and pM categories and with more advanced pathologic tumor-node-metastasis stages. Patients with matrilysin-positive carcinoma had a significantly shorter overall survival time than did those with matrilysin-negative carcinoma. Matrilysin was a significant independent prognostic factor for overall survival in multivariate analysis. In contrast, there was no correlation between the presence of other MMPs or TIMPs and clinicopathologic characteristics, nor was the presence of individual MMPs or TIMPs related to survival. Antisense matrilysin-transfected CFPAC-1 cells expressed reduced levels of matrilysin and demonstrated a similar growth potential but were less invasive in vitro compared with neotransfected CFPAC-1 cells. CONCLUSION: Our results suggest that matrilysin may play a key role in progression of pancreatic carcinoma and thereby contribute to a poor prognosis. Because different synthetic MMP inhibitors affect different types of MMPs to a different degree, examination of the expression of MMPs, especially that of matrilysin, may serve as an indicator for selecting the most effective MMP inhibitor.

scholarly journals TIMP-3 inhibits the procollagen N-proteinase ADAMTS-2

2006 ◽  
Vol 398 (3) ◽  
pp. 515-519 ◽  
Author(s):  
Wei-Man Wang ◽  
Gaoxiang Ge ◽  
N. H. Lim ◽  
Hideaki Nagase ◽  
Daniel S. Greenspan
Keyword(s):  
Extracellular Matrix ◽  
Matrix Metalloproteinases ◽  
Bone Morphogenetic Protein ◽  
Inhibitory Activity ◽  
Tissue Inhibitors Of Metalloproteinases ◽  
Tissue Inhibitors ◽  
Morphogenetic Protein ◽  
Ecm Extracellular Matrix ◽  
Bone Morphogenetic Protein 1

ADAMTS-2 is an extracellular metalloproteinase responsible for cleaving the N-propeptides of procollagens I–III; an activity necessary for the formation of collagenous ECM (extracellular matrix). The four TIMPs (tissue inhibitors of metalloproteinases) regulate the activities of matrix metalloproteinases, which are involved in degrading ECM components. Here we delineate the abilities of the TIMPs to affect biosynthetic processing of procollagens. TIMP-1, -2 and -4 show no inhibitory activity towards ADAMTS-2, in addition none of the TIMPs showed inhibitory activity towards bone morphogenetic protein 1, which is responsible for cleaving procollagen C-propeptides. In contrast, TIMP-3 is demonstrated to inhibit ADAMTS-2 in vitro with apparent Ki values of 160 and 602 nM, in the presence of heparin or without respectively; and TIMP-3 is shown to inhibit procollagen processing by cells.

scholarly journals Effects of genistein on the periovulatory expression of messenger ribonucleic acid for matrix metalloproteinases and tissue inhibitors of metalloproteinases in the rat ovary

Reproduction ◽  
2001 ◽  
pp. 259-265 ◽  
Author(s):  
CM Komar ◽  
M Matousek ◽  
K Mitsube ◽  
M Mikuni ◽  
M Brannstrom ◽  
...  
Keyword(s):  
Matrix Metalloproteinases ◽  
Tyrosine Kinases ◽  
Rna Isolation ◽  
Tissue Inhibitors Of Metalloproteinases ◽  
Tissue Remodelling ◽  
Rnase Protection ◽  
Tissue Inhibitors ◽  
Messenger Ribonucleic Acid ◽  
Gelatinases A And B

The matrix metalloproteinases (MMPs) play critical roles in the ovulatory process. Their expression and activity, together with those of the endogenous tissue inhibitors of metalloproteinases (TIMPs), are stimulated by LH. The LH surge initiates a cascade of events resulting in ovulation and formation of the corpus luteum via activation of protein kinases A and C, as well as tyrosine kinases. In vitro perfused rat ovaries were untreated, or treated with LH (0.2 microg ml(-1)) plus 0.2 mmol 3-isobutyl-1-methylxanthine l(-1) with 0, 10 or 100 micromol genistein l(-1) (an inhibitor of tyrosine kinases) to assess whether tyrosine kinases are mediators of the LH-stimulated increase in ovarian expression of the MMPs and TIMPs. After 10 h of perfusion, ovaries were collected and frozen until RNA isolation. Northern and RNase protection analyses were used to measure mRNA encoding collagenase 3, gelatinases A and B, and TIMPs-1, -2 and -3. Treatment with LH plus 3-isobutyl-1-methylxanthine resulted in a two- and fivefold increase in mRNA encoding collagenase 3 and TIMP-1, respectively (P < 0.05). Treatment with 100 micromol genistein l(-1) blocked the LH-stimulated increase in collagenase 3 (0.012 +/- 0.002 versus 0.028 +/- 0.005 relative units for 100 micromol genistein l(-1) versus LH; P < 0.05), whereas neither dose of genistein affected LH-induced TIMP-1 expression. LH alone or with genistein did not alter the expression of mRNA encoding TIMP-2 and TIMP-3, or mRNA encoding gelatinases A and B. These data indicate that tyrosine kinases play a role in the LH-induced tissue remodelling required for ovulation by mediating the LH-stimulated expression of collagenase 3.

scholarly journals Sirt1 deacetylates and stabilizes p62 to promote hepato-carcinogenesis

2021 ◽  
Vol 12 (4) ◽  
Author(s):  
Lifeng Feng ◽  
Miaoqin Chen ◽  
Yiling Li ◽  
Muchun Li ◽  
Shiman Hu ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Overall Survival ◽  
Cell Growth ◽  
Knockout Mice ◽  
Liver Tumors ◽  
Underlying Mechanism ◽  
Carcinoma Cells ◽  
Conditional Knockout

Abstractp62/SQSTM1 is frequently up-regulated in many cancers including hepatocellular carcinoma. Highly expressed p62 promotes hepato-carcinogenesis by activating many signaling pathways including Nrf2, mTORC1, and NFκB signaling. However, the underlying mechanism for p62 up-regulation in hepatocellular carcinoma remains largely unclear. Herein, we confirmed that p62 was up-regulated in hepatocellular carcinoma and its higher expression was associated with shorter overall survival in patients. The knockdown of p62 in hepatocellular carcinoma cells decreased cell growth in vitro and in vivo. Intriguingly, p62 protein stability could be reduced by its acetylation at lysine 295, which was regulated by deacetylase Sirt1 and acetyltransferase GCN5. Acetylated p62 increased its association with the E3 ligase Keap1, which facilitated its poly-ubiquitination-dependent proteasomal degradation. Moreover, Sirt1 was up-regulated to deacetylate and stabilize p62 in hepatocellular carcinoma. Additionally, Hepatocyte Sirt1 conditional knockout mice developed much fewer liver tumors after Diethynitrosamine treatment, which could be reversed by the re-introduction of exogenous p62. Taken together, Sirt1 deacetylates p62 at lysine 295 to disturb Keap1-mediated p62 poly-ubiquitination, thus up-regulating p62 expression to promote hepato-carcinogenesis. Therefore, targeting Sirt1 or p62 is a reasonable strategy for the treatment of hepatocellular carcinoma.

Expression of matrix metalloproteinases (MMPs-2, -7, -9, and -26) and tissue inhibitors of metalloproteinases (TIMPs-1 and -2) in pleomorphic adenomas and adenoid cystic carcinomas

2018 ◽  
Vol 275 (12) ◽  
pp. 3075-3082 ◽  
Author(s):  
Valéria Souza Freitas ◽  
Jean Nunes dos Santos ◽  
Pedro Paulo de Andrade Santos ◽  
Cassiano Francisco Weege Nonaka ◽  
Leão Pereira Pinto ◽  
...  
Keyword(s):  
Matrix Metalloproteinases ◽  
Tissue Inhibitors Of Metalloproteinases ◽  
Tissue Inhibitors ◽  
Adenoid Cystic ◽  
Pleomorphic Adenomas
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