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Journal of Clinical Microbiology, Dec 1995, 3260-3263, Vol 33, No. 12
W Heneine, WM Switzer, M Busch, RF Khabbaz and JE Kaplan
Molecular subtyping of human T-cell lymphotropic virus type 2 (HTLV-2) by
the currently used method of restriction fragment length polymorphism
analysis may not be sufficiently discriminatory for transmission studies
because of the predominance of single restriction types in various
HTLV-2-infected populations. The utility of single- strand conformations
polymorphism (SSCP) analysis was evaluated as a tool to improve the
sensitivity of the subtyping of HTLV-2. The assay was designed to target a
highly variable region in the long terminal repeat and was shown to be able
to detect single nucleotide changes in cloned HTLV-2 sequences. Analysis of
52 HTLV-2 samples, of which 32 were from 16 sex partner pairs (16 males, 16
females), showed nine different SSCP patterns. Identical SSCP results were
obtained for each of the 16 couples, suggesting the presence of similar
viral genotypes and, therefore, supporting the likelihood of sexual
transmission of HTLV-2 in each of these couples. Furthermore, SSCP analysis
of seven HTLV-2 samples of the same restriction type (b5) showed five
different SSCP patterns. Nucleotide sequencing of two samples with distinct
SSCP patterns confirmed the sequence differences. SSCP provides a facile
and discriminatory tool for the differentiation of HTLV-2 strains,
including those previously indistinguishable by restriction fragment length
polymorphism.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Molecular subtyping of human T-cell lymphotropic virus type 2 by single- strand conformation polymorphism analysis. Retrovirus Epidemiology Donor Study Group
Retrovirus Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.
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