This invention belongs to the field of
biomedical engineering technology, specifically relating to the construction and application of a screening model for influenza
virus receptor binding inhibitors. Addressing the problem of influenza
virus hemagglutinin (HA) being prone to
mutation and having multiple subtypes, making it difficult to screen for broad-spectrum inhibitors, this invention replaces HA with elderberry
lectin (SNA), which specifically recognizes α-2,6-
sialic acid. Using MDCK cells overexpressing α-2,6-
sialic acid, a fluorescently labeled high-
throughput screening model is constructed by labeling SNA with
fluorescein isothiocyanate (FITC). The relative
fluorescence units (RFU) of the
system are detected using a multifunctional
enzyme-linked immunosorbent
assay (ELISA) reader. Active compounds inhibit the binding of SNA to
cell surface receptors, resulting in a lower RFU value, while inactive compounds show a higher RFU value. This invention provides key
technical support for the development of novel inhibitors targeting influenza
virus receptor binding.