Abstract:
:A primary barrier to the success of T cell-recruiting bispecific antibodies in the treatment of solid tumors is the lack of tumor-specific targets, resulting in on-target off-tumor adverse effects from T cell autoreactivity to target-expressing organs. To overcome this, we developed an anti-HER2/CD3 T cell-dependent bispecific (TDB) antibody that selectively targets HER2-overexpressing tumor cells with high potency, while sparing cells that express low amounts of HER2 found in normal human tissues. Selectivity is based on the avidity of two low-affinity anti-HER2 Fab arms to high target density on HER2-overexpressing cells. The increased selectivity to HER2-overexpressing cells is expected to mitigate the risk of adverse effects and increase the therapeutic index. Results included in this manuscript not only support the clinical development of anti-HER2/CD3 1Fab-immunoglobulin G TDB but also introduce a potentially widely applicable strategy for other T cell-directed therapies. The potential of this discovery has broad applications to further enable consideration of solid tumor targets that were previously limited by on-target, but off-tumor, autoimmunity.
journal_name
Sci Transl Medjournal_title
Science translational medicineauthors
Slaga D,Ellerman D,Lombana TN,Vij R,Li J,Hristopoulos M,Clark R,Johnston J,Shelton A,Mai E,Gadkar K,Lo AA,Koerber JT,Totpal K,Prell R,Lee G,Spiess C,Junttila TTdoi
10.1126/scitranslmed.aat5775subject
Has Abstractpub_date
2018-10-17 00:00:00issue
463eissn
1946-6234issn
1946-6242pii
10/463/eaat5775journal_volume
10pub_type
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