Fibroblast-derived factors preserve viability in vitro of mononuclear cells isolated from subjects with HIV-1 infection.
AIDS
; 7(3): 323-9, 1993 Mar.
Article
em En
| MEDLINE
| ID: mdl-8471193
ABSTRACT
OBJECTIVE:
Peripheral blood mononuclear cells (PBMC) from HIV-infected subjects have an increased mortality rate (MR) when incubated in vitro for 3 days in a culture medium. We have previously shown that fibroblast-conditioned medium (FCM) can preserve viability, without significant activation, of human lymphocytes in vitro. We therefore tested the ability of two FCM and other factors to reduce spontaneous MR in HIV-positive PBMC.METHODS:
PBMC were cultured for 3 days in control medium and medium supplemented with FCM or recombinant cytokines [interleukin (IL)-2, IL-6, IL-7, granulocyte macrophage colony-stimulating factor]. Cells viable at day 3 were counted in a cytofluorimeter after staining with ethidium bromide. DNA was extracted from the cultures and evaluated for the presence of low molecular weight fragmentation.RESULTS:
The MR of PBMC from 51 HIV-positive subjects and from 21 healthy controls were 30.1 and 9.5%, respectively (P < 0.0001). The MR was higher in 40 patients with a CD4+ lymphocyte count < 400 x 10(6)/l than in subjects with a count > 400 x 10(6)/l (32.84 versus 20.96%; P = 0.047). IL-2 and FCM significantly reduced MR in HIV-positive subjects (MR 17.8 and 20.4%; P < 0.001 and 0.005, respectively). This effect was more evident in subjects with a CD4+ lymphocyte count < 400 x 10(6)/l and in subjects with negative p24 antigenaemia. Cellular proliferation accounts for increased survival in IL-2-supplemented cultures but not in those with FCM. DNA was extracted from fresh PBMC and cells cultured for 3 days for 22 HIV-positive cases. DNA degradation was documented and bands related to an apoptotic mechanism of death observed, especially in subjects with more advanced disease.CONCLUSIONS:
Our data suggest that FCM inhibits accelerated cell death in vitro of PBMC isolated from HIV-positive patients.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Leucócitos Mononucleares
/
Infecções por HIV
/
HIV-1
/
Substâncias de Crescimento
/
Meios de Cultivo Condicionados
/
Apoptose
/
Fibroblastos
Limite:
Adult
/
Animals
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
AIDS
Assunto da revista:
SINDROME DA IMUNODEFICIENCIA ADQUIRIDA (AIDS)
Ano de publicação:
1993
Tipo de documento:
Article
País de afiliação:
Itália