Biphasic in vitro regulation of retroviral replication by CD8+ cells from nonhuman primates.
J Acquir Immune Defic Syndr (1988)
; 7(5): 438-46, 1994 May.
Article
em En
| MEDLINE
| ID: mdl-8158536
ABSTRACT
CD8+ T cells from naturally infected disease-resistant sooty mangabeys (Cercocebus atys) secrete a soluble factor which inhibits the in vitro replication of the simian immunodeficiency virus (SIV). To gain further insight on the mechanism(s) involved, CD8+ effector T cells and target cells from sooty mangabeys were immortalized and cloned. The target cells were then stably transfected with an SIV-LTR-CAT construct or with the parental CAT plasmid as a control. A quantitative RT-PCR method, providing the necessary sensitivity, was developed to monitor the influence of the cloned CD8+ T cells on the CATmRNA contained in the target cells. It could be demonstrated that a soluble factor was secreted by the cloned CD8+ T cells from sooty mangabeys, which appeared to regulate CATmRNA activity in a dose-dependent and reversible manner. Kinetic experiments showed that the CATmRNA transcriptional activity was initially augmented at 30 min postcoculture and was followed by a marked decrease in transcriptional activity after a few hours. This immediate early response could be mitigated utilizing H7, Calmodulin, or PDTC (a pyrrolidone derivative of dithiocarbamate), suggesting that the pathway was protein kinase-dependent and that the NF-kappa B site may be involved. The inhibitory effect could also be overcome using a protein synthesis inhibitor, suggesting that protein synthesis was needed to negatively regulate CATmRNA activity and hence SIV promoter activity.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Replicação Viral
/
Vírus da Imunodeficiência Símia
/
Antígenos CD8
/
Linfócitos T Reguladores
Limite:
Animals
Idioma:
En
Revista:
J Acquir Immune Defic Syndr (1988)
Assunto da revista:
DOENCAS SEXUALMENTE TRANSMISSIVEIS
/
SINDROME DA IMUNODEFICIENCIA ADQUIRIDA (AIDS)
Ano de publicação:
1994
Tipo de documento:
Article
País de afiliação:
Gabão