Document 0248 DOCN M9440248 TI Characterization of human immunodeficiency virus type 1 isolates from children in Romania: identification of a new envelope subtype. DT 9404 AU Dumitrescu O; Kalish ML; Kliks SC; Bandea CI; Levy JA; School of Medicine, University of California, San Francisco; 94143-0128. SO J Infect Dis. 1994 Feb;169(2):281-8. Unique Identifier : AIDSLINE MED/94149311 AB Human immunodeficiency virus type 1 (HIV-1) isolates recovered from infected children in Romania were characterized for their biologic, serologic, and molecular properties. The isolates were from subjects in different clinical states, and all showed cytopathic properties in peripheral blood mononuclear cells and varying kinetics of replication. The isolates grew to varying titers in macrophages and established T cell lines. Serologic evaluation with Romanian sera indicated stronger antibody response to the gp120 of Romanian isolates than to the envelope protein of HIV-1 isolates from other countries. Although there was cross-neutralization among the Romanian isolates, no substantial activity was noted against HIV-1 prototype strains from the United States, Africa, and Thailand. Genetic analysis of the envelope C2-V3 region strongly suggests that the Romanian isolates are a subtype distinct from those assigned to other HIV-1 strains analyzed to date. This finding raises questions about the origin of HIV-1 in Romania. DE Amino Acid Sequence Child, Preschool Consensus Sequence Female Human HIV Envelope Protein gp120/CHEMISTRY/*IMMUNOLOGY HIV Infections/*EPIDEMIOLOGY/MICROBIOLOGY HIV-1/*CLASSIFICATION/GROWTH & DEVELOPMENT/IMMUNOLOGY Infant Male Molecular Sequence Data Neutralization Tests Phylogeny Romania Sequence Alignment Sequence Homology, Amino Acid Support, U.S. Gov't, P.H.S. Virus Replication JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).