PMID- 1657039 OWN - NLM STAT- MEDLINE DCOM- 19911212 LR - 20190718 IS - 0269-9370 (Print) IS - 0269-9370 (Linking) VI - 5 IP - 9 DP - 1991 Sep TI - Reciprocal in vitro interactions between human herpesvirus-6 and HIV-1 Tat. PG - 1095-8 AB - 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. FAU - Di Luca, D AU - Di Luca D AD - Institute of Microbiology, University of Ferrara, Italy. FAU - Secchiero, P AU - Secchiero P FAU - Bovenzi, P AU - Bovenzi P FAU - Rotola, A AU - Rotola A FAU - Caputo, A AU - Caputo A FAU - Monini, P AU - Monini P FAU - Cassai, E AU - Cassai E LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - AIDS JT - AIDS (London, England) JID - 8710219 RN - 0 (Gene Products, tat) RN - 0 (tat Gene Products, Human Immunodeficiency Virus) RN - EC 2.3.1.28 (Chloramphenicol O-Acetyltransferase) SB - IM MH - Cell Line, Transformed MH - Chloramphenicol O-Acetyltransferase/genetics MH - Gene Products, tat/*genetics/physiology MH - HIV Infections/microbiology MH - HIV Long Terminal Repeat/*genetics/physiology MH - HIV Seropositivity MH - HIV-1/*genetics/physiology MH - Herpesvirus 6, Human/*genetics/physiology MH - Humans MH - In Vitro Techniques MH - Plasmids/genetics MH - Promoter Regions, Genetic/genetics/physiology MH - Transcriptional Activation/*genetics/physiology MH - Transformation, Genetic/genetics MH - Virus Activation/genetics/physiology MH - Virus Replication/genetics/physiology MH - tat Gene Products, Human Immunodeficiency Virus EDAT- 1991/09/01 00:00 MHDA- 1991/09/01 00:01 CRDT- 1991/09/01 00:00 PHST- 1991/09/01 00:00 [pubmed] PHST- 1991/09/01 00:01 [medline] PHST- 1991/09/01 00:00 [entrez] AID - 10.1097/00002030-199109000-00005 [doi] PST - ppublish SO - AIDS. 1991 Sep;5(9):1095-8. doi: 10.1097/00002030-199109000-00005.