Spontaneous neutrophil activation in HTLV-1 infected patients

Detalhes bibliográficos
Autor(a) principal: Guerreiro,Jaqueline B.
Data de Publicação: 2005
Outros Autores: Porto,Maria Aurélia F., Santos,Silvane B., Lacerda,Lino, Ho,John L., Carvalho,Edgar M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Infectious Diseases
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000600010
Resumo: Human T cell lymphotropic Virus type-1 (HTLV-1) induces lymphocyte activation and proliferation, but little is known about the innate immune response due to HTLV-1 infection. We evaluated the percentage of neutrophils that metabolize Nitroblue tetrazolium (NBT) to formazan in HTLV-1 infected subjects and the association between neutrophil activation and IFN-gamma and TNF-alpha levels. Blood was collected from 35 HTLV-1 carriers, from 8 patients with HAM/TSP (HTLV-1- associated myelopathy); 22 healthy individuals were evaluated for spontaneous and lipopolysaccharide (LPS)-stimulated neutrophil activity (reduction of NBT to formazan). The production of IFN-gamma and TNF-alpha by unstimulated mononuclear cells was determined by ELISA. Spontaneous NBT levels, as well as spontaneous IFN-gamma and TNF-alpha production, were significantly higher (p<0.001) in HTLV-1 infected subjects than in healthy individuals. A trend towards a positive correlation was noted, with increasing percentage of NBT positive neutrophils and levels of IFN-gamma. The high IFN-gamma producing HTLV-1 patient group had significantly greater NBT than healthy controls, 43±24% and 17±4.8% respectively (p< 0.001), while no significant difference was observed between healthy controls and the low IFN-gamma-producing HTLV-1 patient group (30±20%). Spontaneous neutrophil activation is another marker of immune perturbation resulting from HTLV-1 infection. In vivo activation of neutrophils observed in HTLV-1 infected subjects is likely to be the same process that causes spontaneous IFN-gamma production, or it may partially result from direct IFN-gamma stimulation.
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spelling Spontaneous neutrophil activation in HTLV-1 infected patientsHTLV-1IFN-gammaTNF-alphaLPSneutrophil activationHuman T cell lymphotropic Virus type-1 (HTLV-1) induces lymphocyte activation and proliferation, but little is known about the innate immune response due to HTLV-1 infection. We evaluated the percentage of neutrophils that metabolize Nitroblue tetrazolium (NBT) to formazan in HTLV-1 infected subjects and the association between neutrophil activation and IFN-gamma and TNF-alpha levels. Blood was collected from 35 HTLV-1 carriers, from 8 patients with HAM/TSP (HTLV-1- associated myelopathy); 22 healthy individuals were evaluated for spontaneous and lipopolysaccharide (LPS)-stimulated neutrophil activity (reduction of NBT to formazan). The production of IFN-gamma and TNF-alpha by unstimulated mononuclear cells was determined by ELISA. Spontaneous NBT levels, as well as spontaneous IFN-gamma and TNF-alpha production, were significantly higher (p<0.001) in HTLV-1 infected subjects than in healthy individuals. A trend towards a positive correlation was noted, with increasing percentage of NBT positive neutrophils and levels of IFN-gamma. The high IFN-gamma producing HTLV-1 patient group had significantly greater NBT than healthy controls, 43±24% and 17±4.8% respectively (p< 0.001), while no significant difference was observed between healthy controls and the low IFN-gamma-producing HTLV-1 patient group (30±20%). Spontaneous neutrophil activation is another marker of immune perturbation resulting from HTLV-1 infection. In vivo activation of neutrophils observed in HTLV-1 infected subjects is likely to be the same process that causes spontaneous IFN-gamma production, or it may partially result from direct IFN-gamma stimulation.Brazilian Society of Infectious Diseases2005-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000600010Brazilian Journal of Infectious Diseases v.9 n.6 2005reponame:Brazilian Journal of Infectious Diseasesinstname:Brazilian Society of Infectious Diseases (BSID)instacron:BSID10.1590/S1413-86702005000600010info:eu-repo/semantics/openAccessGuerreiro,Jaqueline B.Porto,Maria Aurélia F.Santos,Silvane B.Lacerda,LinoHo,John L.Carvalho,Edgar M.eng2006-01-09T00:00:00Zoai:scielo:S1413-86702005000600010Revistahttps://www.bjid.org.br/https://old.scielo.br/oai/scielo-oai.phpbjid@bjid.org.br||lgoldani@ufrgs.br1678-43911413-8670opendoar:2006-01-09T00:00Brazilian Journal of Infectious Diseases - Brazilian Society of Infectious Diseases (BSID)false
dc.title.none.fl_str_mv Spontaneous neutrophil activation in HTLV-1 infected patients
title Spontaneous neutrophil activation in HTLV-1 infected patients
spellingShingle Spontaneous neutrophil activation in HTLV-1 infected patients
Guerreiro,Jaqueline B.
HTLV-1
IFN-gamma
TNF-alpha
LPS
neutrophil activation
title_short Spontaneous neutrophil activation in HTLV-1 infected patients
title_full Spontaneous neutrophil activation in HTLV-1 infected patients
title_fullStr Spontaneous neutrophil activation in HTLV-1 infected patients
title_full_unstemmed Spontaneous neutrophil activation in HTLV-1 infected patients
title_sort Spontaneous neutrophil activation in HTLV-1 infected patients
author Guerreiro,Jaqueline B.
author_facet Guerreiro,Jaqueline B.
Porto,Maria Aurélia F.
Santos,Silvane B.
Lacerda,Lino
Ho,John L.
Carvalho,Edgar M.
author_role author
author2 Porto,Maria Aurélia F.
Santos,Silvane B.
Lacerda,Lino
Ho,John L.
Carvalho,Edgar M.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Guerreiro,Jaqueline B.
Porto,Maria Aurélia F.
Santos,Silvane B.
Lacerda,Lino
Ho,John L.
Carvalho,Edgar M.
dc.subject.por.fl_str_mv HTLV-1
IFN-gamma
TNF-alpha
LPS
neutrophil activation
topic HTLV-1
IFN-gamma
TNF-alpha
LPS
neutrophil activation
description Human T cell lymphotropic Virus type-1 (HTLV-1) induces lymphocyte activation and proliferation, but little is known about the innate immune response due to HTLV-1 infection. We evaluated the percentage of neutrophils that metabolize Nitroblue tetrazolium (NBT) to formazan in HTLV-1 infected subjects and the association between neutrophil activation and IFN-gamma and TNF-alpha levels. Blood was collected from 35 HTLV-1 carriers, from 8 patients with HAM/TSP (HTLV-1- associated myelopathy); 22 healthy individuals were evaluated for spontaneous and lipopolysaccharide (LPS)-stimulated neutrophil activity (reduction of NBT to formazan). The production of IFN-gamma and TNF-alpha by unstimulated mononuclear cells was determined by ELISA. Spontaneous NBT levels, as well as spontaneous IFN-gamma and TNF-alpha production, were significantly higher (p<0.001) in HTLV-1 infected subjects than in healthy individuals. A trend towards a positive correlation was noted, with increasing percentage of NBT positive neutrophils and levels of IFN-gamma. The high IFN-gamma producing HTLV-1 patient group had significantly greater NBT than healthy controls, 43±24% and 17±4.8% respectively (p< 0.001), while no significant difference was observed between healthy controls and the low IFN-gamma-producing HTLV-1 patient group (30±20%). Spontaneous neutrophil activation is another marker of immune perturbation resulting from HTLV-1 infection. In vivo activation of neutrophils observed in HTLV-1 infected subjects is likely to be the same process that causes spontaneous IFN-gamma production, or it may partially result from direct IFN-gamma stimulation.
publishDate 2005
dc.date.none.fl_str_mv 2005-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000600010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000600010
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1413-86702005000600010
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Brazilian Society of Infectious Diseases
publisher.none.fl_str_mv Brazilian Society of Infectious Diseases
dc.source.none.fl_str_mv Brazilian Journal of Infectious Diseases v.9 n.6 2005
reponame:Brazilian Journal of Infectious Diseases
instname:Brazilian Society of Infectious Diseases (BSID)
instacron:BSID
instname_str Brazilian Society of Infectious Diseases (BSID)
instacron_str BSID
institution BSID
reponame_str Brazilian Journal of Infectious Diseases
collection Brazilian Journal of Infectious Diseases
repository.name.fl_str_mv Brazilian Journal of Infectious Diseases - Brazilian Society of Infectious Diseases (BSID)
repository.mail.fl_str_mv bjid@bjid.org.br||lgoldani@ufrgs.br
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