Linked Life Data

9049977

Source:http://linkedlifedata.com/resource/pubmed/id/9049977

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pubmed-article:9049977pubmed:abstractTextRemodelling of the extracellular matrix resulting from increased secretion of metalloproteinase enzymes (MMPs) is implicated in many pathological conditions, including rheumatoid arthritis, restenosis following balloon angioplasty, atherosclerosis and cancer cell invasion and metastasis. Clear definition of the normal and pathological function of individual MMPs will benefit from approaches that use gene transfer to produce increases in MMP levels that mimic those observed in pathological conditions. Similarly, gene transfer methods leading to controlled increases in levels of the tissue inhibitor of metalloproteinases (TIMPs) will help to define the function of MMPs both in vitro and in vivo. Gene transfer of TIMPs may also have therapeutic potential in pathological conditions where inhibition of MMP activity may be beneficial. We have used the adenovirus serotype 5 vector system to generate replication-deficient recombinant adenoviruses capable of expressing the MMP-9, TIMP-1 or -2 genes. High level expression is driven by the cytomegalovirus major immediate early promoter (CMV IEP). Efficient and selective over-production of each recombinant protein was shown by immunofluorescence in either rabbit smooth muscle cells (SMC) or human MCF-7 adenocarcinoma cells. High level secretion directly dependent on the multiplicity of infection (MOI) was observed for each functional transgene by gelatin zymography. Using a quantitative ELISA assay, levels of recombinant TIMP-1 were detected when SMC were infected with as low as three plaque forming units (pfu) of virus per cell in vitro. A linear increase in TIMP-1 secretion was observed up to 1000 pfu/cell of virus (0.75 ng/10(4) cells/24 h at 3 pfu/cell to 1243 ng/10(4) cells/24h at 1000 pfu/cell). Similar levels of secretion of MMP-9 and TIMP-2 were observed by Western blot analysis using the same MOI of adenovirus. Thus, recombinant adenoviruses are an efficient and flexible system for high level expression of MMPs and TIMPs and will be useful tools in the study of matrix remodelling in vivo and in vitro.lld:pubmed
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pubmed-article:9049977pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:9049977pubmed:articleTitleDevelopment of recombinant adenoviruses that drive high level expression of the human metalloproteinase-9 and tissue inhibitor of metalloproteinase-1 and -2 genes: characterization of their infection into rabbit smooth muscle cells and human MCF-7 adenocarcinoma cells.lld:pubmed
pubmed-article:9049977pubmed:affiliationDepartment of Cardiology, University of Wales College of Medicine, Cardiff, UK.lld:pubmed
pubmed-article:9049977pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:9049977pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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