The transactivation induced by human herpesvirus 6 (HHV-6) on the HIV-1 promoter was studied both in the presence and in the absence of the retroviral transactivator protein (Tat) constitutively expressed in Jurkat cells. Jurkat-tat cells were infected with HHV-6, transfected with a plasmid containing HIV-1 long terminal repeat (LTR)/chloramphenicol acetyltransferase (CAT), and CAT assays were performed. HHV-6 infection in the presence of Tat resulted in significantly higher LTR activation than that observed by Tat or HHV-6 alone, indicating that HHV-6 and Tat interact synergically. Furthermore, it was demonstrated that expression of HIV-1 tat inhibits HHV-6 replication, as shown by a 3.6-15.4-fold reduction in infectious yield. We suggest that HHV-6 could trigger HIV reactivation in HIV-seropositive patients which, in turn, could inhibit HHV-6 production.

Reciprocal in vitro interactions between human herpesvirus 6 and HIV-1 Tat

DI LUCA, Dario;SECCHIERO, Paola;ROTOLA, Antonella;Caputo A.;CASSAI, Enzo
1991

Abstract

The transactivation induced by human herpesvirus 6 (HHV-6) on the HIV-1 promoter was studied both in the presence and in the absence of the retroviral transactivator protein (Tat) constitutively expressed in Jurkat cells. Jurkat-tat cells were infected with HHV-6, transfected with a plasmid containing HIV-1 long terminal repeat (LTR)/chloramphenicol acetyltransferase (CAT), and CAT assays were performed. HHV-6 infection in the presence of Tat resulted in significantly higher LTR activation than that observed by Tat or HHV-6 alone, indicating that HHV-6 and Tat interact synergically. Furthermore, it was demonstrated that expression of HIV-1 tat inhibits HHV-6 replication, as shown by a 3.6-15.4-fold reduction in infectious yield. We suggest that HHV-6 could trigger HIV reactivation in HIV-seropositive patients which, in turn, could inhibit HHV-6 production.
1991
DI LUCA, Dario; Secchiero, Paola; Bovenzi, P.; Rotola, Antonella; Caputo, A.; Monini, P.; Cassai, Enzo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1682603
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