title: Generation and characterization of nucleic acid aptamers targeting the capsid P domain of a human norovirus GII.4 strain.
abstract: Human noroviruses (NoV) are the leading cause of acute viral gastroenteritis worldwide. Significant antigenic diversity of NoV strains has limited the availability of broadly reactive ligands for design of detection assays. The purpose of this work was to produce and characterize single stranded (ss)DNA aptamers with binding specificity to human NoV using an easily produced NoV target-the P domain protein. Aptamer selection was done using SELEX (Systematic Evolution of Ligands by EXponential enrichment) directed against an Escherichia coli-expressed and purified epidemic NoV GII.4 strain P domain. Two of six unique aptamers (designated M1 and M6-2) were chosen for characterization. Inclusivity testing using an enzyme-linked aptamer sorbent assay (ELASA) against a panel of 14 virus-like particles (VLPs) showed these aptamers had broad reactivity and exhibited strong binding to GI.7, GII.2, two GII.4 strains, and GII.7 VLPs. Aptamer M6-2 exhibited at least low to moderate binding to all VLPs tested. Aptamers significantly (p<0.05) bound virus in partially purified GII.4 New Orleans outbreak stool specimens as demonstrated by ELASA and aptamer magnetic capture (AMC) followed by RT-qPCR. This is the first demonstration of human NoV P domain protein as a functional target for the selection of nucleic acid aptamers that specifically bind and broadly recognize diverse human NoV strains.
authors.affiliation: Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, 315 Schaub Hall, 400 Dan Allen Drive, Raleigh, NC 27695, USA. Electronic address: mdmoore5@ncsu.edu.
authors.forename: Matthew D
authors.initials: MD
authors.lastname: Moore
authors.affiliation: Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, 315 Schaub Hall, 400 Dan Allen Drive, Raleigh, NC 27695, USA.
authors.forename: Blanca I
authors.initials: BI
authors.lastname: Escudero-Abarca
authors.affiliation: Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, 315 Schaub Hall, 400 Dan Allen Drive, Raleigh, NC 27695, USA.
authors.forename: Soo Hwan
authors.initials: SH
authors.lastname: Suh
authors.affiliation: Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, 315 Schaub Hall, 400 Dan Allen Drive, Raleigh, NC 27695, USA.
authors.forename: Lee-Ann
authors.initials: LA
authors.lastname: Jaykus
mesh_terms: D052157:Aptamers, Nucleotide / Q000737:chemistry / Q000378:metabolism*; D036022:Capsid Proteins / Q000235:genetics* / Q000378:metabolism; D005243:Feces / Q000821:virology; D006801:Humans; D029322:Norovirus / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D052156:SELEX Aptamer Technique / Q000379:methods; D012680:Sensitivity and Specificity
chemical_list: D052157:Aptamers, Nucleotide; D036022:Capsid Proteins
keywords: Aptamer; Molecular detection; Norovirus; SELEX; Viral diagnostics