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Relationship between genotypes and serotypes of genogroup 1 recoviruses: a model for human norovirus antigenic

Tibor Farkas1,2, Cindy Wong Ping Lun2, Brittney Fey2

  • 1University of Cincinnati College of Medicine, Cincinnati, OH, USA.

The Journal of General Virology
|April 5, 2014
PubMed

Insights

Murine noroviruses (NoVs) and Tulane virus are key surrogates for human norovirus research. A new model using diverse genotypic and serotypic ReCVs better reflects human norovirus diversity.

Area of Science:

  • Virology
  • Immunology

Background:

  • Human norovirus (NoV) research requires cell culture-propagable surrogates.
  • Current models using murine NoVs and Tulane virus (a recovirus, ReCV) do not fully capture human NoV diversity.

Purpose of the Study:

  • To analyze genotypic and serotypic relationships among 10 G1 ReCV isolates.
  • To develop a more advanced ReCV model reflecting human NoV biological diversity.

Main Methods:

  • Amino acid sequencing of the virus capsid protein (VP1).
  • Cross-neutralization plaque assays.
  • Classification based on established NoV constraints.

Main Results:

  • G1 ReCVs were classified into three genotypes based on VP1 amino acid sequences.
  • Four distinct serotypes were identified, with two within the G1.2 genotype.
  • Amino acid differences between some ReCV serotypes were less than established NoV genotype thresholds.
  • Cross-neutralization revealed shared epitopes between different ReCV genotypes.

Conclusions:

  • The developed ReCV surrogate model offers a more biologically relevant representation of enteric Calicivirus diversity.
  • Findings suggest a broad range of human NoV serotypes and cross-neutralization epitopes across genotypes.
  • This advanced model can address key questions in enteric Calicivirus research.

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