Linked Life Data

18028878

Source:http://linkedlifedata.com/resource/pubmed/id/18028878

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2008-2-13
pubmed:abstractText
The macrophage protein tyrosine phosphatase-1 SHP-1 has been implicated in the pathogenesis of infection with leishmania. To identify the factors that may interact with SHP-1, Leishmania donovani promastigote lysates were added to a GST-SHP-1 affinity matrix. A 44kDa specifically bound protein was identified as leishmania fructose-1,6-bisphosphate aldolase (aldolase). Purified leishmania aldolase bound to SHP-1 indicating that the interaction was direct. In contrast, purified mammalian aldolase did not bind to SHP-1. Consistent with this, leishmania aldolase activated SHP-1 in vitro, whereas mammalian aldolase did not. The presence of leishmania aldolase in the cytosolic fractions prepared from infected macrophages indicated that leishmania aldolase is exported from phagolysosomes in infected cells where it can target host cytosolic proteins. In fact, co-immunoprecipitation showed association of leishmania aldolase with SHP-1. Moreover, leishmania aldolase-expressing macrophages showed the deactivated phenotype of leishmania infected cells as judged by much reduced inability to induce expression of nitric-oxide synthase in response to interferon-gamma treatment. Collectively, these data show that leishmania aldolase is a novel SHP-1 binding and activating protein that contributes to macrophage dysfunction.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1090-2104
pubmed:author
pubmed:issnType
Electronic
pubmed:day
21
pubmed:volume
364
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
601-7
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Identification of leishmania fructose-1,6-bisphosphate aldolase as a novel activator of host macrophage Src homology 2 domain containing protein tyrosine phosphatase SHP-1.
pubmed:affiliation
Department of Medicine, Division of Infectious Diseases, 2733 Heather Street, Heather Pavilion East, Room 452-D, Vancouver, BC, Canada V5Z 3J5.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't