| Regulation of matrix metalloproteinase-1 by Epstein-Barr virus proteins. | |
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MedLine Citation:
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PMID: 12517806 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Matrix metalloproteinases (MMPs) play crucial roles in tumor progression. To investigate the roles of MMPs in the progression of nasopharyngeal carcinoma (NPC), the expression of MMP-1, MMP-2, MMP-3, MMP-7, MMP-12, MMP-13, MMP-14, and MMP-19 was explored by microarray assay. Among them, MMP-1 was significantly up-regulated in NPC biopsies. These results were confirmed further by real-time quantitative PCR in additional NPC biopsies and comparison with normal tissues and other head and neck cancers. Moreover, the use of RNA from different cellular constituents of NPC biopsies revealed that MMP-1 was detected predominantly in epithelial cells. Immunohistochemical staining of paraffin-fixed NPC sections confirmed that MMP-1 protein was expressed in the epithelial tumor cells. Because EBV is strongly associated with NPC formation, we sought a correlation between viral gene expression and MMP-1 up-regulation. The results showed clearly that the amounts of transcripts, proteins, and enzyme activities of MMP-1 were increased in cells expressing EBV proteins, LMP1 (latent membrane protein 1) and Zta (Z transactivator; also named as BZLF1 or ZEBRA) but not EBNA-1 (EBV nuclear antigen-1). Additionally, the mobility of LMP1 and Zta transfectants was increased in scrape-wound migration assays. The invasiveness and ability to survive in a three-dimensional collagen gel also were enhanced in LMP1- and Zta-expressing cells. Furthermore, anti-MMP-1 antibody and peptide inhibitors could block the invasiveness and survival properties of LMP1 and Zta transfectants, suggesting a real contribution of MMP-1 to cell mobility and survival. Taken together, our data show that the viral LMP1 and Zta proteins regulate the expression and activity of MMP-1, and thereby confer the invasive properties of the cells. This study presents the first evidence that viral proteins are capable of regulating MMP-1 and also provides clues for the role of EBV in NPC progression. |
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Authors:
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Jean Lu; Huey-Huey Chua; Shao-Yin Chen; Jen-Yang Chen; Ching-Hwa Tsai |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Cancer research Volume: 63 ISSN: 0008-5472 ISO Abbreviation: Cancer Res. Publication Date: 2003 Jan |
Date Detail:
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Created Date: 2003-01-08 Completed Date: 2003-03-27 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 2984705R Medline TA: Cancer Res Country: United States |
Other Details:
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Languages: eng Pagination: 256-62 Citation Subset: IM |
Affiliation:
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Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Biopsy Cell Survival DNA Primers Gene Expression Regulation, Enzymologic* Head and Neck Neoplasms / enzymology*, pathology Herpesvirus 4, Human / physiology* Humans Matrix Metalloproteinase 1 / genetics* Nasopharyngeal Neoplasms / enzymology*, pathology Reverse Transcriptase Polymerase Chain Reaction Transcription, Genetic Tumor Cells, Cultured Viral Proteins / metabolism* |
| Chemical | |
Reg. No./Substance:
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0/DNA Primers; 0/Viral Proteins; EC 3.4.24.7/Matrix Metalloproteinase 1 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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