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M9620117.TXT
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1996-02-26
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Document 0117
DOCN M9620117
TI Genotypic characteristics of HTLV-II isolates from Amerindian and
non-Indian populations.
DT 9602
AU Pardi D; Hjelle B; Folks TM; Lal RB; Retrovirus Diseases Branch, Centers
for Disease Control and; Prevention, Atlanta, Georgia 30333, USA.
SO Virus Genes. 1995;10(1):27-35. Unique Identifier : AIDSLINE
GENBANK/L11456
AB The Amerindian human T-cell lymphotropic virus type II isolate
HTLV-IIG12 has been demonstrated to be an HTLV-IIb with several unique
features, including several restriction enzyme site changes, a
distinctive pre-gag region, a stop codon within the pol gene, and an
extended Tax protein. In this study, HTLV-II isolates from Amerindian
and non-Indian populations were characterized by restriction enzyme site
analysis to determine the prevalent HTLV-II subtype. In addition, DNA
amplification by the polymerase chain reaction and Southern blot
analyses were used to probe for the HTLV-IIG12 pre-gag region. Our
results showed that of 13 Guaymi Indian isolates subtyped, all were
HTLV-IIb, and that approximately one third of 17 isolates had the unique
pre-gag region. While other HTLV-II-infected groups contained both
HTLV-IIa and HTLV-IIb isolates, none of these isolates showed evidence
of the distinctive HTLV-IIG12 pre-gag region. Lastly, DNA sequence
analysis was used to determine the prevalence of the stop codon within
the pol gene open reading frame. These analyses revealed that the
occurrence of a stop codon within this sequence appeared to be
characteristic of most HTLV-IIb subtypes. These results further our
understanding of the genetic variations and evolution of the HTLV-II
viruses within the endemically infected Amerindian populations, as well
as U.S. intravenous drug users and other non-Indian populations.
DE Base Sequence Genes, env Genes, gag Genes, pol Genotype Human
HTLV-II/*GENETICS/ISOLATION & PURIF HTLV-II Infections/BLOOD/*VIROLOGY
*Indians, Central American *Indians, North American Molecular Sequence
Data Protein Precursors/GENETICS Sequence Homology, Nucleic Acid
Tumor Cells, Cultured JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).