Abstract: The present invention relates to antibodies (and fragments, variants, fusions and derivatives thereof) with binding specificity for domain 2 of human CD137 which are capable of inhibiting the binding of a reference antibody to human CD137. The antibodies and fragments have utility in the treatment of diseases such as cancer. The invention also relates to pharmaceutical compositions, uses, methods and kits comprising such antibodies.

Abstract: The invention provides bispecific polypeptides comprising a first binding domain, designated B1, which is capable of binding specifically to CD137, and a second binding domain, designated B2, which is capable of specifically binding to a tumour cell-associated antigen. Also provided are pharmaceutical compositions of such bispecific polypeptides and uses of the same in medicine.

Abstract: The present disclosure relates to protein molecules that specifically bind to 5T4 and/or 4-1BB. The molecules may have at least one humanized 5T4-binding or 4-1BB-binding domain. Such molecules are useful for the treatment of cancer. The protein molecule binding to 5T4 or 4-1BB may have a second binding domain that binds to another target. The molecules may bind both 5T4-expressing cells and a cell-surface molecule expressed by an effector cell to enhance effector cell activation, proliferation, survival and/or effector-cell mediated cytotoxicity. The disclosure also provides pharmaceutical compositions comprising the 5T4-binding or 4-1BB-binding polypeptide or protein molecules, nucleic acid molecules encoding these polypeptides and methods of making and using these molecules.

Abstract: The present disclosure relates to protein molecules that specifically bind to 5T4 and/or 4-1BB. The molecules may have at least one humanized 5T4-binding or 4-1BB-binding domain. Such molecules are useful for the treatment of cancer. The protein molecule binding to 5T4 or 4-1BB may have a second binding domain that binds to another target. The molecules may bind both 5T4-expressing cells and a cell-surface molecule expressed by an effector cell to enhance effector cell activation, proliferation, survival and/or effector-cell mediated cytotoxicity. The disclosure also provides pharmaceutical compositions comprising the 5T4-binding or 4-1BB-binding polypeptide or protein molecules, nucleic acid molecules encoding these polypeptides and methods of making and using these molecules.

Abstract: The present invention provides bispecific polypeptides, such as bispecific antibodies, comprising a first binding domain capable of specifically binding to a first T cell target, and a second binding domain capable of specifically binding to a second T cell target, wherein the first and second T cell targets are different targets. The invention further provides compositions of said bispecific polypeptides, as well as methods and uses of the same. The first and/or second T cell target may be selected from the group consisting of OX40, CTLA-4, CD137, CD27, GITR and CD28.