Influenza virus subunit conjugates
US5612037A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1994 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Jul 26, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N2760/16134
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Conjugates of HA protein of influenza virus suitable for formulation as a vaccine for obtaining a strong immune response to the HA protein are formed by separating whole HA protein from the influenza virus by detergent extraction or by providing whole HA protein by recombinant procedure, treating the HA protein with hydroxylamine to form free sulfhydryl groups in the cytoplasmic domain of the protein, and cross-linking the free sulfhydryl group-containing HA protein to itself using a bis-maleimide linker or to a maleimide-modified diphtheria toxoid, tetanus toxoid or influenza NP protein or other carrier molecule. The procedure is applicable to other proteins which can be separated from a cellular material, such as a virus, and which contain thioester bonds convertible to sulfhydryl groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.