Linked Life Data

11440623

Source:http://linkedlifedata.com/resource/pubmed/id/11440623

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pubmed-article:11440623pubmed:abstractTextPathological angiogenesis, or the production of new capillary vessels from preexisting vasculature, within the eye is a serious event that often leads to blindness. Upregulation of vascular endothelial growth factor (VEGF) has been linked to neovascularization in the eye, suggesting that it could be a suitable target to inhibit angiogenic changes. This work investigated whether the presence of a proven antiangiogenic factor, the soluble variant of the VEGF receptor, sFlt-1, in the anterior chamber is sufficient to inhibit new vessel formation in the cornea in an animal model of corneal neovascularization. A recombinant adenovirus vector that can mediate efficient in vivo gene transfer and expression in ocular cells was selected as a delivery agent. We have shown that after the injection of Ad.betagal into the anterior chamber of normal and cauterized rat eyes, corneal endothelial cells and cells of the trabecular meshwork were efficiently transduced and that beta-galactosidase (beta-Gal) expression was maintained up to 10 days postinjection. Cauterization significantly increased the amount of immunoreactive VEGF in vehicle- or Ad.null-injected animals (t test, p < 0.001 and p < 0.001, respectively). However, when cauterization was combined with Ad.sflt injection there was no statistically significant increase in the amount of immunoreactive VEGF (p = 0.12). The injection of Ad.sflt into the anterior chamber slowed or inhibited VEGF-induced angiogenic changes. After cauterization, 100% of uninjected and vehicle-injected and 82% of Ad.null-injected animals developed moderate to severe corneal angiogenesis in contrast to 18% of Ad.sflt-injected animals. These in vivo results suggest that the transient presence of antiangiogenic agents in the anterior chamber can be successfully used to inhibit the development of corneal angiogenesis.lld:pubmed
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pubmed-article:11440623pubmed:year2001lld:pubmed
pubmed-article:11440623pubmed:articleTitleInhibition of angiogenesis by adenovirus-mediated sFlt-1 expression in a rat model of corneal neovascularization.lld:pubmed
pubmed-article:11440623pubmed:affiliationCentre for Ophthalmology and Visual Science, University of Western Australia, Nedlands, Western Australia 6009, Australia.lld:pubmed
pubmed-article:11440623pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:11440623pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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