Abstract:
OBJECTIVES:To investigate the effects of Uro-Vaxom, an oral vaccine against Escherichia coli urinary tract infections, on human monocyte-derived dendritic cells (moDCs). Dendritic cells (DCs) are important antigen-presenting cells of the immune system. DCs are considered promising cellular adjuvants for inducing immunity against cancer or infectious diseases. METHODS:moDCs were generated in the presence of granulocyte-macrophage colony-stimulating factor and interleukin-4. Flow cytometric phenotyping, as well as the ability to stimulate T cells in an allogeneic mixed leukocyte reaction, was used to assess the effects of Uro-Vaxom on human moDCs. In addition, interferon-gamma and interleukin-4 production by T cells stimulated with Uro-Vaxom-activated moDCs were measured by intracellular fluorescence-activated cell sorter-staining at the single-cell level. RESULTS:Uro-Vaxom induced the terminal maturation of CD83+ moDCs in a dose-dependent manner. Phenotypic analyses revealed that Uro-Vaxom-activated moDCs displayed a phenotype of mature DCs with high levels of MHC molecules and increased levels of co-stimulatory molecules (CD80, CD86). Consistent with these findings, Uro-Vaxom-activated moDCs potently stimulated T-cell proliferation and interferon-gamma production in the allogeneic mixed leukocyte reaction. CONCLUSIONS:In DC-based immunotherapy, Uro-Vaxom could be used as a stimulant of DC maturation, which meets the standards of good manufacturing practice. In future preclinical studies, we will evaluate the effectiveness of a vaccination with Uro-Vaxom-activated moDCs. It could be an attractive treatment option in preventing recurrent E. coli urinary tract infections in predisposed individuals.
journal_name
Urologyjournal_title
Urologyauthors
Schmidhammer S,Ramoner R,Höltl L,Bartsch G,Thurnher M,Zelle-Rieser Cdoi
10.1016/s0090-4295(02)01767-3subject
Has Abstractpub_date
2002-09-01 00:00:00pages
521-6issue
3eissn
0090-4295issn
1527-9995pii
S0090429502017673journal_volume
60pub_type
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