What Is Iza-Bren (BL-B01D1)? The First EGFR×HER3 Bispecific ADC Approved for Nasopharyngeal Carcinoma in China
On 23 June 2026, China's NMPA approved iza-bren (伦康依隆妥单抗, BL-B01D1) — the first globally approved EGFR×HER3 bispecific antibody-drug conjugate — for adults with recurrent or metastatic nasopharyngeal carcinoma after failure of at least second-line systemic therapy including platinum chemotherapy and PD-1/PD-L1 inhibitors. Covers dual EGFR/HER3 targeting mechanism, Ed-04 topoisomerase I payload (DAR 8), Phase III BL-B01D1-303 trial results published in The Lancet (cORR 54.6% vs 27.0%, mPFS 8.38 vs 4.34 months), safety profile, BMS global licensing deal, pipeline indications (ESCC, TNBC), physician-led treatment decision framework, and what international NPC patients should ask their doctor before any later-line planning.
Key Highlights
- First-in-class EGFR×HER3 bispecific ADC — globally first approved drug of this class (China NMPA, June 2026)
- Approved indication: R/M NPC after ≥2L systemic therapy including platinum + PD-1/PD-L1 inhibitor failure
- Mechanism: dual EGFR/HER3 blockade + topoisomerase I inhibitor payload; bispecific design may address antigen heterogeneity and reduce skin toxicity vs single-target EGFR agents
- Phase III BL-B01D1-303 (55 Chinese centres, 386 patients): cORR 54.6% vs 27.0%, mDoR 8.5 vs 4.8 months, mPFS 8.38 vs 4.34 months (HR 0.44) vs physician's-choice chemotherapy
- Pipeline: ESCC and TNBC marketing applications accepted; 14 Phase III trials across multiple solid tumours; BMS co-development deal (USD 8.4B)
Important Facts
- Iza-bren is approved for a specific heavily pre-treated R/M NPC population — not first-line or all NPC patients
- Trial results apply to the studied population; individual response and survival cannot be predicted from group data
- China's southern oncology centres manage among the world's largest NPC caseloads — relevant for international patients from endemic regions considering later-line review
- Structured MDT review based on full treatment history is the appropriate first step before assuming iza-bren eligibility or planning travel
- A drug approval creates a medical option for physicians — patients should not self-select iza-bren; all treatment decisions must follow the treating oncologist's advice