Proteomic Analysis of Excretory-Secretory Products of Mesocestoides corti Metacestodes Reveals Potential Suppressors of Dendritic Cell Functions.

Abstract:

:Accumulating evidences have assigned a central role to parasite-derived proteins in immunomodulation. Here, we report on the proteomic identification and characterization of immunomodulatory excretory-secretory (ES) products from the metacestode larva (tetrathyridium) of the tapeworm Mesocestoides corti (syn. M. vogae). We demonstrate that ES products but not larval homogenates inhibit the stimuli-driven release of the pro-inflammatory, Th1-inducing cytokine IL-12p70 by murine bone marrow-derived dendritic cells (BMDCs). Within the ES fraction, we biochemically narrowed down the immunosuppressive activity to glycoproteins since active components were lipid-free, but sensitive to heat- and carbohydrate-treatment. Finally, using bioassay-guided chromatographic analyses assisted by comparative proteomics of active and inactive fractions of the ES products, we defined a comprehensive list of candidate proteins released by M. corti tetrathyridia as potential suppressors of DC functions. Our study provides a comprehensive library of somatic and ES products and highlight some candidate parasite factors that might drive the subversion of DC functions to facilitate the persistence of M. corti tetrathyridia in their hosts.

journal_name

PLoS Negl Trop Dis

authors

Vendelova E,Camargo de Lima J,Lorenzatto KR,Monteiro KM,Mueller T,Veepaschit J,Grimm C,Brehm K,Hrčková G,Lutz MB,Ferreira HB,Nono JK

doi

10.1371/journal.pntd.0005061

subject

Has Abstract

pub_date

2016-10-13 00:00:00

pages

e0005061

issue

10

eissn

1935-2727

issn

1935-2735

pii

PNTD-D-16-00900

journal_volume

10

pub_type

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