title: Intracellular expression of RNA transcripts complementary to the human immunodeficiency virus type 1 gag gene inhibits viral replication in human CD4+ lymphocytes.
abstract: Intracellular expression of antisense transcripts was evaluated for its potential to interfere with human immunodeficiency virus type 1 (HIV-1) replication. Retroviral vectors encoding HIV-1 psi-gag complementary sequences downstream of a selectable gene (neo, puromycin gene, or Lyt2 gene) were stable and yielded high titers. Human CEMSS T cells were transduced with amphotropic retroviral vectors to express RNA complementary to the psi-gag sequence of HIV-1. Replication of laboratory-adapted HIV-1 strains was inhibited by more than 1 order of magnitude (log10) in these transduced cells even at high inoculation doses (4 x 10(4) 50% tissue culture infective doses). Antisense-mediated anti-HIV efficacy was further demonstrated by survival of CD4+ cells in these cultures relative to controls. The level of anti-HIV-1 activity of the psi-gag antisense sequence correlated with the length of the antisense transcript. Maximal anti-HIV efficacy was observed with complementary sequence more than 1,000 nucleotides long, whereas transcripts less than 400 nucleotides long failed to inhibit HIV-1 replication. Expression of psi-gag antisense RNA also reduced HIV-1 JR-CSF replication 10-fold in primary CD4+ lymphocytes. These results obtained with a T-cell line and primary peripheral blood lymphocytes indicate the potential of long antisense RNAs as an efficient anti-HIV-1 therapeutic agent for gene therapy.
authors.affiliation: Progenesys Program, Systemix Inc., Palo Alto, California 94304, USA.
authors.forename: G
authors.initials: G
authors.lastname: Veres
authors.forename: S
authors.initials: S
authors.lastname: Escaich
authors.forename: J
authors.initials: J
authors.lastname: Baker
authors.forename: C
authors.initials: C
authors.lastname: Barske
authors.forename: C
authors.initials: C
authors.lastname: Kalfoglou
authors.forename: H
authors.initials: H
authors.lastname: Ilves
authors.forename: H
authors.initials: H
authors.lastname: Kaneshima
authors.forename: E
authors.initials: E
authors.lastname: Böhnlein
mesh_terms: D019380:Anti-HIV Agents / Q000494:pharmacology*; D015496:CD4-Positive T-Lymphocytes / Q000166:cytology / Q000821:virology*; D002478:Cells, Cultured; D015750:Genes, gag / Q000235:genetics*; D005816:Genetic Complementation Test; D016655:HIV Core Protein p24 / Q000378:metabolism; D015497:HIV-1 / Q000187:drug effects* / Q000378:metabolism / Q000502:physiology; D006801:Humans; D007963:Leukocytes, Mononuclear / Q000166:cytology; D016372:RNA, Antisense / Q000235:genetics / Q000494:pharmacology*; D012367:RNA, Viral; D014779:Virus Replication
chemical_list: D019380:Anti-HIV Agents; D016655:HIV Core Protein p24; D016372:RNA, Antisense; D012367:RNA, Viral