Patent ID: 11090382

Abstract:
Provided are proteins comprising two chimeric polypeptide chains; wherein each chimeric polypeptide chain comprises an Fc receptor binding portion comprising two immunoglobulin G heavy chain constant regions; and an immunoglobulin tailpiece region. The amino acid sequence and glycosylation of the tailpiece region of the proteins is adapted, as compared to the sequence and glycosylation of wild-type immunoglobulin, to inhibit polymerisation of the protein. The adaptation of the amino acid sequence may be the loss of a cysteine residue, for example the cysteine residue corresponding to residue 248 of SEQ ID NO: 1. The proteins may be used in intravenous immunoglobulin (IVIG) or subcutaneous immunoglobulin (SCIG) therapy. They may be used in the prevention or treatment of a disease mediated through binding of sialic acid-dependent receptors. Proteins of the invention may be used in the prevention and/or treatment of autoimmune or inflammatory diseases. The proteins may be conjugated to an immune modulator, and in such cases are suitable for vaccine use.