Detection and genotyping of human group A rotaviruses by oligonucleotide microarray hybridization

被引:130
作者
Chizhikov, V
Wagner, M
Ivshina, A
Hoshino, Y
Kapikian, AZ
Chumakov, K
机构
[1] US FDA, Ctr Biol Evaluat & Res, Lab Method Dev, Kensington, MD 20895 USA
[2] NIAID, Infect Dis Lab, NIH, Bethesda, MD 20892 USA
关键词
D O I
10.1128/JCM.40.7.2398-2407.2002
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
A rapid and reliable method for the identification of five clinically relevant G genotypes (G1 to G4 and G9) of human rotaviruses based on oligonucleotide microarray hybridization has been developed. The genotype-specific oligonucleotides immobilized on the surface of glass slides were selected to bind to the multiple target regions within the VP7 gene that are highly conserved among individual rotavirus genotypes. Rotavirus cDNA was amplified in a PCR with primers common to all group A rotaviruses. A second round of nested PCR amplification was performed in the presence of indodicarbocyanine-dCTP and another pair of degenerate primers also broadly specific for all genotypes. The use of one primer containing 5'-biotin allowed us to prepare fluorescently labeled single-stranded hybridization probe by binding of another strand to magnetic beads. The identification of rotavirus genotype was based on hybridization with several individual genotype-specific oligonucleotides. This approach combines the high sensitivity of PCR with the selectivity of DNA-DNA hybridization. The specificity of oligonucleotide microchip hybridization was evaluated by testing 20 coded rotavirus isolates from different geographic areas for which genotypes were previously determined by conventional methods. Analysis of the coded specimens showed that this microarray-based method is capable of unambiguous identification of all rotavirus strains. Because of the presence of random mutations, each individual virus isolate produced a unique hybridization pattern capable of distinguishing different isolates of the same genotype and, therefore, subgenotype differentiation. This strain information indicates one of several advantages that microarray technology has over conventional PCR techniques.
引用
收藏
页码:2398 / 2407
页数:10
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