title: Comparison of variable region 3 sequences of human immunodeficiency virus type 1 from infected children with the RNA and DNA sequences of the virus populations of their mothers.
abstract: We have compared the variable region 3 sequences from 10 human immunodeficiency virus type 1 (HIV-1)-infected infants to virus sequences from the corresponding mothers. The sequences were derived from DNA of uncultured peripheral blood mononuclear cells (PBMC), DNA of cultured PBMC, and RNA from serum collected at or shortly after delivery. The infected infants, in contrast to the mothers, harbored homogeneous virus populations. Comparison of sequences from the children and clones derived from DNA of the corresponding mothers showed that the transmitted virus represented either a minor or a major virus population of the mother. In contrast to an earlier study, we found no evidence of selection of minor virus variants during transmission. Furthermore, the transmitted virus variant did not show any characteristic molecular features. In some cases the transmitted virus was more related to the virus RNA population of the mother and in other cases it was more related to the virus DNA population. This suggests that either cell-free or cell-associated virus may be transmitted. These data will help AIDS researchers to understand the mechanism of transmission and to plan strategies for prevention of transmission.
authors.affiliation: Department of Virology, Karolinska Institute, Stockholm, Sweden.
authors.forename: G
authors.initials: G
authors.lastname: Scarlatti
authors.forename: T
authors.initials: T
authors.lastname: Leitner
authors.forename: E
authors.initials: E
authors.lastname: Halapi
authors.forename: J
authors.initials: J
authors.lastname: Wahlberg
authors.forename: P
authors.initials: P
authors.lastname: Marchisio
authors.forename: M A
authors.initials: MA
authors.lastname: Clerici-Schoeller
authors.forename: H
authors.initials: H
authors.lastname: Wigzell
authors.forename: E M
authors.initials: EM
authors.lastname: Fenyö
authors.forename: J
authors.initials: J
authors.lastname: Albert
authors.forename: M
authors.initials: M
authors.lastname: Uhlén
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D016384:Consensus Sequence; D005260:Female; D015752:Genes, env; D015658:HIV Infections / Q000235:genetics*; D006679:HIV Seropositivity / Q000235:genetics; D015497:HIV-1 / Q000235:genetics*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008431:Maternal-Fetal Exchange; D008969:Molecular Sequence Data; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious; D014759:Viral Envelope Proteins / Q000235:genetics*
chemical_list: D014759:Viral Envelope Proteins