Akeso's Next-Generation HER3 ADC AK138D1 Combined with Ivonescimab: First Patient Enrolled in Phase Ib/II Breast Cancer Study, Advancing the IO2.0 + ADC2.0 Strategy

HONG KONG, June 15, 2026 /PRNewswire/ -- Akeso, Inc. (HKEX: 9926) today announced that the first patient has been enrolled in the Phase Ib/II clinical study (AK138D1-202) evaluating its internally developed next-generation HER3 antibody-drug conjugate (ADC), AK138D1, as either monotherapy or in combination with ivonescimab for the treatment of advanced breast cancer. HER3 is broadly expressed across various solid tumors, including breast, ovarian, colon, gastric, lung, skin, and pancreatic cance