Biocytogen Announces Clinical Milestone with First Patient Dosed in Phase 1 Trial of IDEAYA’s First-in-Class B7H3/PTK7 Bispecific TOP1 ADC IDE034

Biocytogen Announces Clinical Milestone with First Patient Dosed in Phase 1 Trial of IDEAYA's First-in-Class B7H3/PTK7 Bispecific TOP1 ADC IDE034

BEIJING, China -- Biocytogen Pharmaceuticals (Beijing) Co., Ltd. (Biocytogen, SSE: 688796; HKEX: 02315), a global biotechnology company that drives the research and development of novel antibody-based drugs with innovative technologies, today announced that its partner IDEAYA Biosciences, Inc. (“IDEAYA”; Nasdaq: IDYA) has dosed the first patient in IDEAYA’s Phase 1 dose-escalation/expansion clinical trial of IDE034, an investigational B7H3/PTK7 …

Biocytogen Announces Clinical Milestone with First Patient Dosed in Phase 1 Trial of IDEAYA’s First-in-Class B7H3/PTK7 Bispecific TOP1 ADC IDE034

BEIJING, China--(BUSINESS WIRE)--Feb 27, 2026-

New tumor-targeting drug starts first human trial, triggers $5M payout

IDE034 targets tumor cells co-expressing B7H3 and PTK7, with 30–40% co-expression in solid tumors. First Phase 1 dosing triggers $5M payment to Biocytogen.