Human PBMC-derived dendritic cells transduced with an adenovirus vectorinduce cytotoxic T-lymphocyte responses against a vector-encoded antigen in vitro.

Abstract:

:Dendritic cells (DC) are among the most potent antigen-presenting cells known and play an important role in the initiation of antigen-specific T-lymphocyte responses. Several recent studies have demonstrated that DC expressing vector-encoded tumor-associated antigens can induce protective and therapeutic immunity in murine cancer models. In the current study we set out to examine in vitro the utility of adenovirus vectors in the transduction of human DC for the induction of antigen-specific T-lymphocyte responses against a defined vector-encoded antigen. DC were derived from the adherent fraction of PBMC by culture in defined medium containing GM-CSF and IL-4. A replication-defective E1/E3-deleted type 5 adenovirus vector encoding bacterial beta-galactosidase (beta-gal) under the transcriptional control of a CMV promoter was used to transduce DC at multiplicities of infection (MOI) up to 1000. While high MOI were required to achieve efficient transduction there was no significant effect on DC morphology, immunophenotype or potency in allogeneic lymphocyte proliferation assays. Furthermore, transduced DC-induced antigen-specific CTL activity against adenoviral proteins and more significantly, the vector-encoded antigen beta-gal. These data clearly demonstrate the potential of adenovirus vectors in anticancer DC vaccine strategies and provide an important link between existing animal data and human clinical application.

journal_name

Gene Ther

journal_title

Gene therapy

authors

Diao J,Smythe JA,Smyth C,Rowe PB,Alexander IE

doi

10.1038/sj.gt.3300899

keywords:

subject

Has Abstract

pub_date

1999-05-01 00:00:00

pages

845-53

issue

5

eissn

0969-7128

issn

1476-5462

journal_volume

6

pub_type

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