title: Identification of a new VP4 serotype of human rotaviruses.
abstract: A new VP4 gene allele was identified by sequencing of two rotavirus recovered from infants with diarrhea. Strains HAL1166 (a VP7 serotype 8 human rotavirus from Finland) and PA169 (a VP7 serotype 6 human rotavirus from Italy) present 22-43% nucleotide sequence divergence and 14-45% amino acid divergence in the VP4 gene with rotaviruses belonging to various VP4 gene alleles previously reported. Cross-neutralization analysis between PA169 and rotaviruses belonging to the other recognized VP4 (P) serotypes had previously shown that none of them was similar to PA169. Hyperimmune serum prepared against a reassortant with the VP4 gene of strain PA169 and the VP7 gene of serotype 2 strain DS1 failed to neutralize previously recognized human rotavirus VP4 serotypes, indicating that PA169 represents a new VP4 serotype specificity. In addition, one of four neutralizing monoclonal antibodies directed to the VP4 of PA169 was specific for this virus, while three others had very limited cross-reactivity with rotaviruses possessing different VP4s.
authors.affiliation: Virus Laboratory, University of Pavia, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Gerna
authors.forename: J
authors.initials: J
authors.lastname: Sears
authors.forename: Y
authors.initials: Y
authors.lastname: Hoshino
authors.forename: A D
authors.initials: AD
authors.lastname: Steele
authors.forename: O
authors.initials: O
authors.lastname: Nakagomi
authors.forename: A
authors.initials: A
authors.lastname: Sarasini
authors.forename: J
authors.initials: J
authors.lastname: Flores
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal; D000914:Antibodies, Viral / Q000276:immunology; D001483:Base Sequence; D002213:Capsid / Q000235:genetics / Q000276:immunology*; D036022:Capsid Proteins; D005814:Genes, Viral / Q000235:genetics*; D006168:Guinea Pigs; D006801:Humans; D051379:Mice; D008807:Mice, Inbred BALB C; D008969:Molecular Sequence Data; D009500:Neutralization Tests; D012401:Rotavirus / Q000145:classification* / Q000235:genetics / Q000276:immunology; D017422:Sequence Analysis, DNA; D017423:Sequence Analysis, RNA; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D012703:Serotyping
chemical_list: D000911:Antibodies, Monoclonal; D000914:Antibodies, Viral; D036022:Capsid Proteins; C060339:VP4 protein, Rotavirus