KEA1-97 is a Thioredoxin-Caspase 3 interaction disruptor. It was found to target lysine 72 of thioredoxin, inhibiting its interactions with caspase 3 and inducing apoptosis without affecting other thioredoxin activity. KEA1-97 induced apoptosis in breast cancer cells and treatment of immune-deficient SCID mice at 5 mg/kg ip impaired breast tumor xenograft growth.