De Santis R, Faggioni G, Ciammaruconi A, Fillo S, Clausi V, Corcioli F, Lista F, Azzi A. A FRET based melting curve analysis to detect nucleotide variations in HA receptor-binding site of H5N1 virus.
Mol Cell Probes 2010;
24:298-302. [PMID:
20600823 DOI:
10.1016/j.mcp.2010.06.004]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2010] [Revised: 06/17/2010] [Accepted: 06/17/2010] [Indexed: 11/30/2022]
Abstract
Outbreaks of highly pathogenic H5N1 influenza A virus represent a major public health problem because of the possibility of direct transmission of these viruses from avian species to humans. For influenza H5N1 hemagglutinin, a switch from SA-a-2, 3-Gal to SA-a-2, 6-Gal receptor specificity is a critical step that could lead to inter-human transmission. The monitoring of the receptor-binding preference of H5N1 viruses represents an instrument to detect a potential pandemic virus. The aim of this study was to develop a method based on the fluorescence resonance energy transfer (FRET) technology and melting peaks analysis for rapid screening of pandemic H5N1 influenza A virus. Three selected probes corresponding to a 23bp nucleotide sequence of the avian receptor-binding site were used in a real-time RT-PCR to detect nucleotide variations. Five strains of avian influenza A viruses isolated from avian species and two synthesized HA gene were tested. The results showed that the melting peaks analysis is a reliable screening method for detecting the variability of the H5N1 receptor-binding site.
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