PMID: 9435860Jan 22, 1998Paper

Targeting endothelium for gene therapy via receptors up-regulated during angiogenesis and inflammation

Cancer Immunology, Immunotherapy : CII
T J WickhamI Kovesdi

Abstract

Endothelial cells are an attractive target for gene therapy because they are intimately involved in disease processes associated with inflammation and angiogenesis and because endothelial cells are readily accessible to gene therapy vectors via the circulation. Furthermore, specific receptors are up-regulated during angiogenesis or during inflammation. Therefore it should be possible to target the specific populations of endothelial cells involved in each of these disease processes. We have utilized two bispecific antibodies to target entry of an adenovirus vector into endothelial cells expressing a receptor up-regulated during angiogenesis (alpha v integrins) and a receptor up-regulated during inflammation (E-selectin). Both bispecific antibodies contain the anti-FLAG M2 mAb, which binds to a FLAG epitope genetically incorporated into the penton base protein of the vector, AdFLAG. The anti-alpha v-integrin x anti-FLAG bsAb was able to direct binding and entry of AdFLAG into endothelial cells via alpha v integrins. Likewise, the anti-E-selectin x anti-FLAG bsAb was able to direct binding and entry of AdFLAG into tumor-necrosis-factor(TNF)-activated endothelial cells via E-selectin. Endothelial cells not activated with TNF were ...Continue Reading

Citations

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