Deglycosylation of Tropheryma whipplei biofilm and discrepancies between diagnostic results during Whipple’s disease progression

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 du...

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Veröffentlicht in:Scientific reports 2016-03, Vol.6 (1), p.23883-23883, Article 23883
Hauptverfasser: Audoly, Gilles, Fenollar, Florence, Lagier, Jean-Christophe, Lepidi, Hubert, Raoult, Didier
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Lagier, Jean-Christophe
Lepidi, Hubert
Raoult, Didier
description 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.
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subjects 13/51
14
14/32
14/63
38
631/326/107
692/4020/1503/1581/257
692/420/254
Alveoli
Anti-Bacterial Agents - pharmacology
Anti-Bacterial Agents - therapeutic use
Bacteria
Bacteriolysis
Biofilms
Biopsy
Bronchus
Deglycosylation
Deoxyribonucleic acid
Disease Progression
DNA
Duodenum - microbiology
Duodenum - pathology
Epithelial cells
Fluorescence in situ hybridization
Glycoside Hydrolases - chemistry
Glycoside Hydrolases - pharmacology
Glycosylation
Human health and pathology
Humanities and Social Sciences
Humans
Hydrolysis
Immunofluorescence
Infectious diseases
Intestinal Mucosa - microbiology
Intestinal Mucosa - pathology
Life Sciences
Localization
Lymph
Lymph nodes
Lymph Nodes - microbiology
Lymph Nodes - pathology
Macrophages
Microscopy, Confocal
multidisciplinary
Ribonucleic acid
RNA
Science
Tropheryma - physiology
Tropheryma whipplei
Whipple Disease - diagnosis
Whipple Disease - drug therapy
Whipple Disease - microbiology
Whipple's disease
title Deglycosylation of Tropheryma whipplei biofilm and discrepancies between diagnostic results during Whipple’s disease progression
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