Directed Change in TNFα Specificity to Create DR5 Antagonists.

Death receptor 5 (DR5) is a promising target for antitumor therapy due to its high expression on different tumor cells. Resistance of various tumor cells against TRAIL, a natural ligand for the death receptors, reduces its therapeutic potential and prompts the search for novel agonists at these receptors. Previous screening across the combinatorial peptide library yielded a peptide sequence KVVLTHR that specifically binds DR5. Incorporation of this sequence into TNFα resulted in binding DR5 with mutant protein TNFα-mut and appearance of cytotoxicity against lymphoma cells.