Abstract:
:Schistosomes are parasitic platyhelminths that currently infect over 200 million people globally. The parasites can live for years in a putatively hostile environment - the blood of vertebrates. We have hypothesized that the unusual schistosome tegument (outer-covering) plays a role in protecting parasites in the blood; by impeding host immunological signaling pathways we suggest that tegumental molecules help create an immunologically privileged environment for schistosomes. In this work, we clone and characterize a schistosome alkaline phosphatase (SmAP), a predicted ∼60 kDa glycoprotein that has high sequence conservation with members of the alkaline phosphatase protein family. The SmAP gene is most highly expressed in intravascular parasite life stages. Using immunofluorescence and immuno-electron microscopy, we confirm that SmAP is expressed at the host/parasite interface and in internal tissues. The ability of living parasites to cleave exogenous adenosine monophosphate (AMP) and generate adenosine is very largely abolished when SmAP gene expression is suppressed following RNAi treatment targeting the gene. These results lend support to the hypothesis that schistosome surface enzymes such as SmAP could dampen host immune responses against the parasites by generating immunosuppressants such as adenosine to promote their survival. This notion does not rule out other potential functions for the adenosine generated e.g. in parasite nutrition.
journal_name
PLoS Negl Trop Disjournal_title
PLoS neglected tropical diseasesauthors
Bhardwaj R,Skelly PJdoi
10.1371/journal.pntd.0001011subject
Has Abstractpub_date
2011-04-05 00:00:00pages
e1011issue
4eissn
1935-2727issn
1935-2735journal_volume
5pub_type
杂志文章abstract:BACKGROUND:Crimean-Congo hemorrhagic fever (CCHF) activity has recently been detected in the Kordufan region of Sudan. Since 2008, several sporadic cases and nosocomial outbreaks associated with high case-fatality have been reported in villages and rural hospitals in the region. PRINCIPAL FINDINGS:In the present study...
journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
doi:10.1371/journal.pntd.0001159
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pub_type: 杂志文章,多中心研究
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journal_title:PLoS neglected tropical diseases
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
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journal_title:PLoS neglected tropical diseases
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
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更新日期:2012-01-01 00:00:00
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
doi:10.1371/journal.pntd.0001555
更新日期:2012-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:2012-01-01 00:00:00
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
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更新日期:2014-10-02 00:00:00
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pub_type: 杂志文章
doi:10.1371/journal.pntd.0007538
更新日期:2019-07-25 00:00:00
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journal_title:PLoS neglected tropical diseases
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
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更新日期:2010-03-09 00:00:00
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章,评审
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更新日期:2013-01-01 00:00:00
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doi:10.1371/journal.pntd.0000557
更新日期:2009-12-01 00:00:00
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pub_type: 杂志文章
doi:10.1371/journal.pntd.0002965
更新日期:2014-07-10 00:00:00
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journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
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更新日期:2016-09-15 00:00:00
abstract:BACKGROUND:Zika virus (ZIKV) is an important flavivirus infection. Although ZIKV infection is rarely fatal, risk for severe disease in adults is not well described. Our objective was to describe the spectrum of illness in U.S. Veterans with ZIKV infection. METHODOLOGY:Case series study including patients with laborato...
journal_title:PLoS neglected tropical diseases
pub_type: 杂志文章
doi:10.1371/journal.pntd.0006416
更新日期:2018-05-24 00:00:00