Recombinant Streptococcus gordonii for mucosal delivery of a scFv microbicidal antibody.

Abstract:

:The gram-positive bacterium Streptococcus gordonii was engineered to express the microbicidal molecule H6, which is an antiidiotypic single chain antibody mimicking a yeast killer toxin. S. gordonii is a human commensal which we developed as a model system for mucosal delivery of heterologous proteins. The in vivo candidacidal activity of both H6-secreting and H6-surface-displaying streptococcal strains were assayed in a well-established rat model of vaginal candidiasis. At day 21 full clearance of Candida albicans infection was observed in 75% of animals treated with the H6-secreting strain, and in 37.5% of animals treated with the strain expressing H6 on the surface, while all animals treated with the control strain were still infected. The observed candidacidal effect was comparable with that observed with the antimycotic drug fluconazole. These data confirm the potential of H6 as a candidacidal agent and show how promising is the approach of using recombinant bacteria for mucosal delivery of biologically active molecules.

journal_name

Int Rev Immunol

authors

Oggioni MR,Beninati C,Boccanera M,Medaglini D,Spinosa MR,Maggi T,Conti S,Magliani W,De Bernardis F,Teti G,Cassone A,Pozzi G,Polonelli L

doi

10.3109/08830180109043039

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

275-87

issue

2

eissn

0883-0185

issn

1563-5244

journal_volume

20

pub_type

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