Expression analysis of the matrix GLA protein and VE-cadherin gene promoters in the outflow pathway.

Journal Article (Journal Article)

PURPOSE: To test the ability of promoter fragments from the matrix Gla protein (MGP) and vascular endothelial-cadherin (VE-cad) genes to target gene expression in a specific manner in the cells of the outflow pathway, by using adenoviral-mediated gene transfer in organ culture. METHODS: Perfused anterior segments of human eyes were infected with replication-deficient recombinant adenoviruses expressing the beta-galactosidase reporter gene driven by the cytomegalovirus (CMV; control, n = 6), MGP (n = 6), or VE-cad (n = 12) promoters. Forty-eight hours after infection, the anterior segments were fixed and stained for beta-galactosidase activity. The distribution of beta-galactosidase expression was analyzed in paraffin-embedded sections. RESULTS: The MGP promoter fragment resulted in beta-galactosidase expression by the cells of the conventional outflow pathway and did not show any activity in the corneal endothelium or other cells posterior to the scleral spur. Adenovirus containing the VE-cad promoter fragment showed functionality of the promoter in vascular endothelial cells, but failed to produce any detectable expression in the cells of the outflow pathway. CONCLUSIONS: Directed expression by the MGP gene promoter specifically to the trabecular meshwork (TM) provides a new tool for specific gene transfer to the outflow pathway. Results with the VE-cad promoter fragment indicate possible differences in the regulation of this gene between vascular and Schlemm's canal endothelial cells. Taken together, these data demonstrate the feasibility of targeted gene expression to the outflow pathway cells using tissue specific promoters.

Full Text

Duke Authors

Cited Authors

  • Gonzalez, P; Caballero, M; Liton, PB; Stamer, WD; Epstein, DL

Published Date

  • May 2004

Published In

Volume / Issue

  • 45 / 5

Start / End Page

  • 1389 - 1395

PubMed ID

  • 15111593

International Standard Serial Number (ISSN)

  • 0146-0404

Digital Object Identifier (DOI)

  • 10.1167/iovs.03-0537


  • eng

Conference Location

  • United States