Publications des scientifiques de l'IRD

Audoly G., Fenollar F., Lagier J. C., Lepidi H., Raoult Didier. (2016). Deglycosylation of Tropheryma whipplei biofilm and discrepancies between diagnostic results during Whipple's disease progression. Scientific Reports - Nature, 6, p. art. 23883. ISSN 2045-2322.

Titre du document
Deglycosylation of Tropheryma whipplei biofilm and discrepancies between diagnostic results during Whipple's disease progression
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000373050300002
Auteurs
Audoly G., Fenollar F., Lagier J. C., Lepidi H., Raoult Didier
Source
Scientific Reports - Nature, 2016, 6, p. art. 23883 ISSN 2045-2322
Whipple's disease is a systemic infectious disease associated with the bacterium Tropheryma whipplei. Numerous reports have presented puzzling discrepancies between diagnosis methods. We addressed this confusion using fluorescent in situ hybridization and immunofluorescence assays to evaluate 34 duodenal biopsies and 1 lymph node biopsy from Whipple's patients. We showed the presence of bacteria in both CK20(+) epithelial cells and CD68(+) macrophages. Bacteria are found embedded in a biofilm hindering the detection of T. whipplei. Only after treatment of biopsies by glycosidases, co-localization of T. whipplei RNA/DNA with bacterial proteins was restored. Moreover, using 13 bronchoalveolar lavages and 7 duodenal biopsies, we found that hydrolysis of the biofilm weakened the bacteria, facilitated bacterial DNA extraction and improved the sensitivity of qPCR detection by up to 1000x opening new perspectives for diagnostic and scientific approaches.
Plan de classement
Santé : généralités [050] ; Entomologie médicale / Parasitologie / Virologie [052] ; Biotechnologies [084]
Description Géographique
FRANCE
Localisation
Fonds IRD
Identifiant IRD
PAR00014417
Contact