Publication
Title
Neutrophils enhance early 'Trypanosoma brucei' infection onset
Author
Abstract
In this study, Trypanosoma brucei was naturally transmitted to mice through the bites of infected Glossina morsitans tsetse flies. Neutrophils were recruited rapidly to the bite site, whereas monocytes were attracted more gradually. Expression of inflammatory cytokines (il1b, il6), il10 and neutrophil chemokines (cxcl1, cxcl5) was transiently up-regulated at the site of parasite inoculation. Then, a second influx of neutrophils occurred that coincided with the previously described parasite retention and expansion in the ear dermis. Congenital and experimental neutropenia models, combined with bioluminescent imaging, indicate that neutrophils do not significantly contribute to dermal parasite control and elicit higher systemic parasitemia levels during the infection onset. Engulfment of parasites by neutrophils in the skin was rarely observed and was restricted to parasites with reduced motility/ viability, whereas live parasites escaped phagocytosis. To our knowledge, this study represents the first description of a trypanosome infection promoting role of early innate immunological reactions following an infective tsetse fly bite. Our data indicate that the trypanosome is not hindered in its early development and benefits from the host innate responses with the neutrophils being important regulators of the early infection, as already demonstrated for the sand fly transmitted Leishmania parasite.
Language
English
Source (journal)
Scientific reports. - London, 2011, currens
Publication
London : Nature Publishing Group , 2018
ISSN
2045-2322
DOI
10.1038/S41598-018-29527-Y
Volume/pages
8 (2018) , 11 p.
Article Reference
11203
ISI
000439686700026
Pubmed ID
30046157
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
Tolerantie en resistentie tegen parasiet infecties: de trypanosomatidae als paradigma
NANOSYM: Symbiotic bacteria as a delivery system for Nanobodies that target the insect-parasite interplay
Veterinary and human parasitology.
Exploring and targeting the kinome of immune cells exposed to protozoan parasites.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 16.08.2018
Last edited 02.10.2024
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