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M9650353.TXT
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1996-03-09
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Document 0353
DOCN M9650353
TI Molecular analysis of human T-cell lymphotropic virus type II from Wayuu
Indians of Colombia demonstrates two subtypes of HTLV-IIb.
DT 9605
AU Switzer WM; Owen SM; Pieniazek DA; Nerurkar VR; Duenas-Barajas E;
Heneine W; Lal RB; Retrovirus Diseases Branch, Centers for Disease
Control and; Prevention, Atlanta, Georgia 30333, USA.
SO Virus Genes. 1995;10(2):153-62. Unique Identifier : AIDSLINE
GENBANK/U12795
AB Studies of the genetic heterogeneity of human T-cell lymphotropic virus
type II (HTLV-II) have revealed the presence of two genetic subtypes,
termed HTLV-IIa and HTLV-IIb. The HTLV-IIb subtype encodes an
immunodominant epitope present at the C-terminus of the extended Tax
protein and, by using an LTR-based, restriction fragment-length
polymorphism (RFLP) assay, can be further classified into IIb60-IIb5,
with HTLV-IIb1 (Central Amerindian-like) and HTLV-IIb5 (North
Amerindian-like) being characteristic subtypes for Native American
Indians. To determine the antigenic and genetic heterogeneity among
HTLV-II-infected South Amerindians, we used a Tax synthetic peptide
immunoassay on serum, and RFLP and phylogenetic analysis on LTR
sequences amplified from genomic DNA from four Wayuu Indians of
Colombia. The Wayuu specimens displayed seroreactivity to the
immunodominant epitope located in the extended Tax region, as predicted,
and demonstrated genetic heterogeneity by the presence of both the IIB1
(Wyu1, Zuc31) and IIb5 (Wyu2, Zuc42) subtypes sequences within separate
phylogroups represented by the Guaymi Indian (IIb1) and North Amerindian
(IIb5) sequences, respectively. Sequence analysis showed that major LTR
regulatory motifs and the cis-acting repressive elements in the LTR RNA
secondary structure were relatively conserved in both Wayuu subtypes,
but the predicted secondary structure of the rex response stem loop in
the Wyu2 (IIb5) LTR sequence was 45 nucleotides (nt) and 95 nt longer
than that observed in the Wyu1 (IIb1) and G12.1 (IIb1) LTR sequences,
respectively. These results extend our knowledge of the genetic
heterogeneity of HTLV-II in South Amerindians.
DE Amino Acid Sequence Antigens, Viral/IMMUNOLOGY Base Sequence Cell
Line, Transformed Colombia/EPIDEMIOLOGY DNA, Viral/CHEMISTRY/GENETICS
Gene Products, tax/GENETICS Genes, Viral Genetic Heterogeneity Human
HTLV-II/*CLASSIFICATION/GENETICS/IMMUNOLOGY/ISOLATION & PURIF HTLV-II
Infections/EPIDEMIOLOGY/VIROLOGY *Indians, South American Molecular
Sequence Data Nucleic Acid Conformation Phylogeny Repetitive
Sequences, Nucleic Acid Serotyping JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).