Interleukin-10-secreting CD4 cells from aged patients with AIDS decrease in-vitro HIV replication and tumour necrosis factor alpha production.
AIDS
; 21(13): 1763-70, 2007 Aug 20.
Article
em En
| MEDLINE
| ID: mdl-17690575
OBJECTIVE: To evaluate the impact of age on the proliferative response, cytokine profile and viral kinetics in AIDS patients treated successfully with antiretroviral drugs. METHODS: Peripheral blood mononuclear cells (PBMC), CD4 cell-depleted PBMC or CD4 T cells from young adult and aged HIV-1-infected patients were activated in vitro with anti-CD3 with or without interleukin (IL)-2. Lymphoproliferation and cytokines were measured after 3 days and in-vitro HIV-1 replication after 7 days. RESULTS: Both lymphoproliferation and cytokine [IL-1beta, tumour necrosis factor alpha (TNF-alpha) and interferon gamma (IFN-gamma)] secretion were higher in younger than in older AIDS patients. In cultures of cells derived from aged patients and activated by anti-CD3, IFN-gamma production was severely damage and IL-10 production was much higher. Although IL-2 addition to activated PBMC elevated IFN-gamma secretion, IL-10 production remained elevated in the aged group. The depletion of CD4 T lymphocytes from these cultures dramatically reduced released IL-10 in the older group but did not alter significantly IFN-gamma production. Interestingly, higher IL-10 levels produced by CD4 T cells were related to lower in-vitro HIV-1 replication, and the blockade of this cytokine by anti-IL-10 monoclonal antibody enhanced virus replication. This effect may be correlated with elevated TNF-alpha secretion. Finally, impaired IFN-gamma secretion detected in activated CD4 T cells obtained from aged patients was not directly correlated with high IL-10 production. CONCLUSIONS: Elevated IL-10 production by aged AIDS patients contributed considerably to control of HIV replication and to inhibition of TNF-alpha secretion but not to the reduced IFN-gamma production.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Linfócitos T CD4-Positivos
/
Síndrome da Imunodeficiência Adquirida
/
HIV-1
/
Fator de Necrose Tumoral alfa
/
Interleucina-10
Limite:
Adult
/
Aged
/
Humans
/
Middle aged
Idioma:
En
Revista:
AIDS
Assunto da revista:
SINDROME DA IMUNODEFICIENCIA ADQUIRIDA (AIDS)
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Reino Unido