Responsiveness of human polymorphonuclear cells (PMNL) to stimulation by a mannoprotein fraction (MP-F2) of Candida albicans; enhanced production of IL-6 and tumour necrosis factor-alpha (TNF-alpha) by MP-F2-stimulated PMNL from HIV-infected subjects.
Clin Exp Immunol
; 107(3): 451-7, 1997 Mar.
Article
em En
| MEDLINE
| ID: mdl-9067516
ABSTRACT
IL-1beta, IL-6, IL-8 and TNF-alpha production by PMNL from 21 HIV-infected (HIV+), including 11 full-blown AIDS, and 20 HIV-uninfected (HIV-) subjects (matched for age and sex to HIV+ ones) was studied by reverse transcriptase-polymerase chain reaction (RT-PCR) and ELISA. PMNL from both categories of subjects were strongly stimulated in their actual cytokine production by a mannoprotein fraction (MP-F2) of Candida albicans, as well as by the bacterial lipopolysaccharide (LPS). These stimulatory effects were apparently due to increased cytokine gene expression and were substantially reversed by the physiological inhibitor IL-10. However, PMNL from HIV+ subjects showed increased IL-6 and TNF-alpha gene expression and produced more IL-6 and TNF-alpha than PMNL from HIV- controls, under similar stimulation conditions. This difference could not be attributed to a given stage of HIV infection, any associated medication, or to a generalized increase of gene expression, as quantitatively similar beta-actin and IL-1beta transcripts were detected. Moreover, no significant difference in IL-8 production by the PMNL from HIV+ and HIV- subjects was observed. Our studies suggest that PMNL from HIV+ subjects might add to other cellular sources of IL-6 and TNF-alpha (e.g. monocytes-macrophages) in contributing to the cytokine-dysregulated pattern typical of the HIV+ patient.
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Coleções:
01-internacional
Contexto em Saúde:
2_ODS3
Base de dados:
MEDLINE
Assunto principal:
Fragmentos de Peptídeos
/
Proteínas Fúngicas
/
Glicoproteínas de Membrana
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Infecções por HIV
/
Interleucina-6
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Fator de Necrose Tumoral alfa
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Ativação de Neutrófilo
/
Neutrófilos
Limite:
Adult
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Female
/
Humans
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Male
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Middle aged
Idioma:
En
Revista:
Clin Exp Immunol
Ano de publicação:
1997
Tipo de documento:
Article