title: Characterization of genotype P[9]G12 rotavirus strains from Argentina: high similarity with Japanese and Korean G12 strains.
abstract: The circulation of the unusual P[9]G12 strains was previously reported in suburban Buenos Aires, Argentina and in Far Eastern Asian countries. To examine genetic relationships of these strains the genes coding VP7, VP4, and NSP1 from two Argentine, one Japanese and one Korean P[9]G12 isolates were sequenced and their overall genome relatedness was determined by liquid hybridization. In addition, liquid hybridization was used to compare this group of strains to the previous G12 isolates L26 and Se585, and prototype Wa, DS-1, and AU-1 strains. The genomes of the Argentinean, Japanese and Korean strains were virtually indistinguishable by hybridization assays, suggesting very high sequence relatedness for all 11 segments. Hybridization assays also demonstrated that these four strains belong to the AU-1 genogroup and that their genetic relationship with rotaviruses L26 and Se585 is limited to the VP7 gene. The VP7, VP4, and NSP1 genes of the Argentinean, Japanese and Korean strains were highly homologous to each other and to Thai strain T152 ( approximately 99% identity). These results together with the report of a similar strain detected during 2003 in Brazil are consistent with a recent importation and dissemination of the G12 strains from Far Eastern countries into South America. Increasing reports from several regions of the world demonstrating a variety of different G12 reassortant strains suggests that routine surveillance for this serotype should be conducted to determine its potential for global emergence.
authors.affiliation: Laboratory of Immunology and Virology (LIV), Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina. acastello@unq.edu.ar
authors.forename: Alejandro A
authors.initials: AA
authors.lastname: Castello
authors.forename: Toyoko
authors.initials: T
authors.lastname: Nakagomi
authors.forename: Osamu
authors.initials: O
authors.lastname: Nakagomi
authors.forename: Baoming
authors.initials: B
authors.lastname: Jiang
authors.forename: Jung O
authors.initials: JO
authors.lastname: Kang
authors.forename: Roger I
authors.initials: RI
authors.lastname: Glass
authors.forename: Graciela
authors.initials: G
authors.lastname: Glikmann
authors.forename: Jon R
authors.initials: JR
authors.lastname: Gentsch
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000235:genetics; D001118:Argentina; D036022:Capsid Proteins / Q000235:genetics; D002460:Cell Line; D002648:Child; D005260:Female; D005838:Genotype; D006801:Humans; D007223:Infant; D007564:Japan; D007723:Korea; D008297:Male; D008969:Molecular Sequence Data; D010802:Phylogeny; D012401:Rotavirus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D012400:Rotavirus Infections / Q000821:virology*; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D017361:Viral Nonstructural Proteins / Q000235:genetics
chemical_list: D000956:Antigens, Viral; D036022:Capsid Proteins; C060339:VP4 protein, Rotavirus; C050779:VP7 protein, Rotavirus; D017361:Viral Nonstructural Proteins; C104282:nsp1 protein, Rotavirus