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Journal of Environmental Pathology, Toxicology and Oncology

Publicado 4 números por año

ISSN Imprimir: 0731-8898

ISSN En Línea: 2162-6537

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 2.4 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 2.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.5 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00049 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.59 SJR: 0.429 SNIP: 0.507 CiteScore™:: 3.9 H-Index: 49

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Cell Membrane-Associated MT1-MMP Dependent Activation of MMP-2 in SiHa (Human Cervical Cancer) Cells

Volumen 25, Edición 4, 2006, pp. 655-666
DOI: 10.1615/JEnvironPatholToxicolOncol.v25.i4.50
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SINOPSIS

Among the soluble MMPs, MMP-2 (gelatinase A) is particularly important in the invasive property of tumor cells. Cell membrane-associated MMP-2 activation is one of the challenging areas in tumor biology. In the present communication, we studied the membrane dependent activation of MMP-2 in SiHa cells. Methods: Activation of pro-MMP-2 by membrane fraction, membrane extract, and live SiHa cells was studied by gelatin zymography. The role of MT1-MMP in MMP-2 activation was studied by incubating SiHa cells and cell membrane fractions with anti-MT1-MMP antibody. Results: Activation of purified pro-MMP-2 by membrane fraction isolated from SiHa cells, by SiHa cell membrane extract and by SiHa cells, pro-MMP-2 from Con A treated HT-1080 conditioned medium by SiHa cells, and pro-MMP-2 from serum free culture medium of SiHa cells and cervical tissue homogenate by SiHa cell membrane fraction was shown by gelatin zymography. SiHa membrane fraction activated only pro-MMP-2 from purified MMP-9/MMP-2 mixture, indicating that the activation is specific for MMP-2. Inhibition of MMP-2 activation in the presence of anti-MT1-MMP antibody strongly indicated that the cell membrane mediated MMP-2 activation is MT1-MMP dependent. Immunocytochemistry of SiHa cells demonstrated expression of MT1-MMP at focal points. Invasion assay showed that invasiveness of anti-MT1-MMP antibody treated SiHa cells through Matrigel was drastically reduced compared to control SiHa cells. Conclusions: Our findings furnish an example of the cell membrane-associated MT1-MMP mediated MMP-2 activation in SiHa cells and suggest that this MT1-MMP mediated MMP-2 activation is of importance in tumor invasion and metastasis. This MT1-MMP mediated MMP-2 activation on tumor cell surface could be a realistic target for managing metastatic diseases.

CITADO POR
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