Improved Gene Delivery to Intestinal Mucosa by Adenoviral Vectors Bearing Subgroup B and D Fibers

Improved gene delivery to intestinal mucosa by adenoviral vectors bearing subgroup B and d fibers.

A major obstacle to successful oral vaccination is the lack of antigen delivery systems that are both safe and highly efficient. Conventional replication-incompetent adenoviral vectors, derived from human adenoviruses of subgroup C, are poorly efficient in delivering genetic material to differentiated intestinal epithelia. To date, 51 human adenovirus serotypes have been identified and shown to...

Adenoviral Vectors: Potential and Challenges as a Gene Delivery System

Tropism-Modification Strategies for Targeted Gene Delivery Using Adenoviral Vectors

Achieving high efficiency, targeted gene delivery with adenoviral vectors is a long-standing goal in the field of clinical gene therapy. To achieve this, platform vectors must combine efficient retargeting strategies with detargeting modifications to ablate native receptor binding (i.e. CAR/integrins/heparan sulfate proteoglycans) and "bridging" interactions. "Bridging" interactions refer to co...

Helper-dependent adenoviral vectors as gene delivery vehicles

Adenoviral (Ad)-mediated in vivo gene transfer and expression is limited in part by cellular immune responses to viralencoded proteins. In an attempt to diminish these responses, we have previously developed and described helperdependent (HD) Ad vectors in which the viral protein coding sequences are completely deleted. These vectors provided efficient delivery, and greater safety which represe...

Targeted delivery of adenoviral vectors by cytotoxic T cells.

Effective targeting of vectors to tumor cells that have metastasized to multiple different tissue sites remains a major challenge for gene therapy. Tumor-specific cytotoxic T lymphocytes (CTLs) have been shown in animal models and in humans to be able to cross tissue barriers and traffic to tumor cells. However, their capacity to eliminate malignancy has been limited by tumor immune evasion str...