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- Document 0388
- DOCN M9620388
- TI Syncytium induction in primary CD4+ T-cell lines from normal donors by
- human immunodeficiency virus type 1 isolates with non-syncytium-inducing
- genotype and phenotype in MT-2 cells.
- DT 9602
- AU Todd BJ; Kedar P; Pope JH; Sir Albert Sakzewski Virus Research Centre,
- Royal Children's; Hospital, Brisbane, Queensland, Australia.
- SO J Virol. 1995 Nov;69(11):7099-105. Unique Identifier : AIDSLINE
- MED/96013812
- AB Human immunodeficiency virus type 1 (HIV-1) isolates classified as
- syncytium-inducing (SI) or non-SI (NSI) in the MT-2 T-cell line exhibit
- characteristic sequence differences in the V1-V2 and V3 regions of the
- env gene. Seven HIV-1 isolates were phenotyped as NSI or SI in the MT-2
- cell line. Unexpectedly, all four NSI viruses induced large syncytia 4
- to 8 days postinoculation in a panel of five primary CD4+ T-cell lines
- (including two clones) generated from the peripheral blood of normal
- donors by exposure to infectious HIV-1, inactivated HIV-1, or
- Epstein-Barr virus. The primary T-cell lines yielded neither HIV-1
- provirus nor infectious HIV by PCR analysis or exhaustive coculture with
- phytohemagglutinin-treated blast cells. Three isolates (TC354, PK1, and
- PK2) were biologically cloned and retained their SI or NSI phenotypes in
- MT-2 and primary T-cell lines. The biologically cloned provirus DNA was
- also used to clone and sequence the relevant V2 and V3 regions of the
- env genes. The amino acid sequences of the V2 and V3 regions were
- characteristic of patterns already reported for the NSI, switch NSI, and
- SI phenotypes, respectively. This evidence precludes the possibility
- that these results were due to contamination of the NSI isolates with SI
- virus. The results unequivocally indicate that HIV-1 isolates with the
- NSI genotype and phenotype in MT-2 cells may actively induce syncytia in
- cloned CD4+ T cells in vitro and support the view that direct cytopathic
- effects may contribute to the steady decline in CD4+ T cells in
- asymptomatic HIV-1-seropositive patients without detectable SI virus.
- DE Amino Acid Sequence Cell Line Coculture Comparative Study Consensus
- Sequence CD4-Positive T-Lymphocytes/*VIROLOGY Flow Cytometry Genotype
- *Giant Cells/CYTOLOGY/VIROLOGY Herpesvirus 4, Human/PATHOGENICITY
- Human HIV Envelope Protein gp120/CHEMISTRY/ISOLATION & PURIF HIV
- Seronegativity/IMMUNOLOGY HIV Seropositivity/IMMUNOLOGY/VIROLOGY
- HIV-1/GENETICS/ISOLATION & PURIF/*PHYSIOLOGY Immunophenotyping
- Kinetics Molecular Sequence Data Phenotype Polymerase Chain Reaction
- Reference Values Support, Non-U.S. Gov't *Virus Replication JOURNAL
- ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
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-