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In vivo imaging reveals an essential role for neutrophils in leishmaniasis transmitted by sand flies.

作者信息

Peters Nathan C, Egen Jackson G, Secundino Nagila, Debrabant Alain, Kimblin Nicola, Kamhawi Shaden, Lawyer Phillip, Fay Michael P, Germain Ronald N, Sacks David

机构信息

Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA.

出版信息

Science. 2008 Aug 15;321(5891):970-4. doi: 10.1126/science.1159194.


DOI:10.1126/science.1159194
PMID:18703742
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2606057/
Abstract

Infection with the obligate intracellular protozoan Leishmania is thought to be initiated by direct parasitization of macrophages, but the early events following transmission to the skin by vector sand flies have been difficult to examine directly. Using dynamic intravital microscopy and flow cytometry, we observed a rapid and sustained neutrophilic infiltrate at localized sand fly bite sites. Invading neutrophils efficiently captured Leishmania major (L.m.) parasites early after sand fly transmission or needle inoculation, but phagocytosed L.m. remained viable and infected neutrophils efficiently initiated infection. Furthermore, neutrophil depletion reduced, rather than enhanced, the ability of parasites to establish productive infections. Thus, L.m. appears to have evolved to both evade and exploit the innate host response to sand fly bite in order to establish and promote disease.

摘要

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本文引用的文献

[1]
Quantification of the infectious dose of Leishmania major transmitted to the skin by single sand flies.

Proc Natl Acad Sci U S A. 2008-7-22

[2]
Modulation of dendritic cell function by Leishmania parasites.

J Immunol. 2008-4-1

[3]
How human neutrophils kill and degrade microbes: an integrated view.

Immunol Rev. 2007-10

[4]
Apoptosis driven infection.

Autoimmunity. 2007-6

[5]
Leishmania major induces distinct neutrophil phenotypes in mice that are resistant or susceptible to infection.

J Leukoc Biol. 2007-8

[6]
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Parasitology. 2006

[7]
Innate response to focal necrotic injury inside the blood-brain barrier.

J Immunol. 2006-10-15

[8]
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Immunol Rev. 2006-10

[9]
Clearance of apoptotic and necrotic cells and its immunological consequences.

Apoptosis. 2006-10

[10]
Quantitative imaging of Plasmodium transmission from mosquito to mammal.

Nat Med. 2006-2

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