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Title: Impact of lipoteichoic acid modification on the performance of the probiotic Lactobacillus rhamnosus GG in experimental colitis
Authors: Claes, Ingmar
Lebeer, Sarah
Shen, Chong
Verhoeven, Tine
Dilissen, Ellen
De Hertogh, Gert
Bullens, Dominique
Ceuppens, Jan
Van Assche, Gert
Vermeire, Severine
Rutgeerts, Paul
Vanderleyden, Jozef
De Keersmaecker, Sigrid # ×
Issue Date: 2010
Publisher: Blackwell Science Ltd.
Series Title: Clinical and Experimental Immunology vol:162 issue:2 pages:306-314
Abstract: While some probiotic strains might have adjuvant effects in the therapy for inflammatory bowel diseases (IBD), these effects remain controversial and cannot be generalized. In this study, a dltD mutant of the model probiotic Lactobacillus rhamnosus GG (LGG), having a drastic modification in its lipoteichoic acid (LTA) molecules, was analyzed for its effects in an experimental colitis model. Dextran sulphate sodium (DSS) was used to induce either moderate to severe or mild chronic colitis in mice. Mice received either phosphate buffered saline (PBS), LGG wild-type or the dltD mutant via the drinking water. Macroscopic parameters, histological abnormalities, cytokine and Toll-like receptor (TLR) expression were analyzed to assess disease activity. LGG wild-type did not show efficacy in the different experimental colitis set-ups. This wild-type strain even seemed to exacerbate the severity of colitic parameters in the moderate to severe colitis model compared to untreated mice. In contrast, mice treated with the dltD mutant showed an improvement of some colitic parameters compared to LGG wild-type-treated mice in both experimental models. In addition, treatment with the dltD mutant correlated with a significant downregulation of TLR2 expression and of downstream pro-inflammatory cytokine expression in the colitic mice. These results show that molecular cell surface characteristics of probiotics are crucial when probiotics are considered for use as supporting therapy in IBD.
ISSN: 0009-9104
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre of Microbial and Plant Genetics
Laboratory of Genetics of Autoimmunity
Laboratory of Clinical Immunology
Translational Cell & Tissue Research
Laboratory of Pediatric Immunology
Translational Research in GastroIntestinal Disorders
× corresponding author
# (joint) last author

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