Bioconjugates of E. coli o-antigen polysaccharides, methods of production thereof, and methods of use thereof
US11446370B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 18, 2020 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Mar 18, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/30
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A bioconjugate of an E. coli glucosylated O4 antigen polysaccharide covalently linked to a carrier protein and compositions thereof are provided. Also provided are recombinant host cells for producing the bioconjugate, and methods of producing the bioconjugate using the recombinant host cells. The recombinant host cells contain a nucleic acid encoding a glucosyl transferase capable of modifying the E. coli O4 antigen with glucose branching to produce the glucosylated O4 antigen polysaccharide. Bioconjugates of an E. coli glucosylated O4 antigen polysaccharide described herein can be used alone or in combination with one or more additional E. coli O-antigen polysaccharides to induce antibodies against an E. coli glucosylated antigen, and to vaccinate a subject against extra-intestinal pathogenic E. coli (ExPEC).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.