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. 2003 Jun;41(6):2492-7.
doi: 10.1128/JCM.41.6.2492-2497.2003.

Molecular analysis of human herpesvirus 8 by using single nucleotide polymorphisms in open reading frame 26

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Molecular analysis of human herpesvirus 8 by using single nucleotide polymorphisms in open reading frame 26

Tokiomi Endo et al. J Clin Microbiol. 2003 Jun.

Abstract

Human herpesvirus 8 (HHV-8) can be classified into distinct subtypes on the basis of sequence polymorphisms in several open reading frames (ORFs). We analyzed the subtypes of HHV-8 in 59 human immunodeficiency virus-infected Japanese patients by using polymorphisms in ORF26 and found that over two-thirds of the HHV-8 isolates fell into major subtype A. We also found that single nucleotide polymorphisms (SNPs) at nucleotide positions 1032 (C-to-A substitution) and 1055 (G-to-T substitution) in HHV-8 ORF26 were correlated with increased susceptibility to Kaposi's sarcoma, compared to the results obtained with HHV-8 with wild-type nucleotides at these positions (P = 0.0106). This observation suggests that molecular heterogeneity of the HHV-8 genome affects the biological properties of HHV-8, resulting in different clinical phenotypes of HHV-8 infection. Since sensitive PCR of ORF26 allowed us to analyze the SNPs by using peripheral blood from HHV-8-infected patients, the ORF26 SNPs will be a potent tool for investigating the pathogenesis of HHV-8 infection.

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Figures

FIG. 1.
FIG. 1.
Phylogenetic analysis of eight ORF26 SNP types. The sequences of eight types of ORF26 SNPs were aligned and analyzed by CLUSTAL W to produce a phylogenetic tree. The eight SNP types were divided into three groups: group I, types 1 and 2; group II, types 4, 5, and 6; and group III, types 3, 7, and 8.

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