Methods of treatment using CTLA4 mutant molecules

摘要

The present invention provides soluble CTLA4 mutant molecules which bind with greater avidity to the CD80 and/or CD86 antigen than wild type CTLA4 or non-mutated CTLA4Ig. The soluble CTLA4 molecules have a first amino acid sequence comprising the extracellular domain of CTLA4, where certain amino acid residues within the S25-R33 region and M97-G107 region are mutated. The mutant molecules of the invention may also include a second amino acid sequence which increases the solubility of the mutant molecule.

主权项

1. A method for treating graft versus host disease in a subject comprising administering to the subject a CTLA4 mutant molecule, wherein the CTLA4 mutant molecule binds CD80 and/or CD86 and comprises an extracellular domain of CTLA4 as shown in SEQ ID NO:8 beginning with alanine at position 26 or methionine at position 27 and ending with aspartic acid at position 150, wherein in the extracellular domain, an alanine at position 55 is substituted with a tyrosine, and a leucine at position 130 is substituted with a glutamic acid.