On September 2, 2025 SystImmune, Inc. (SystImmune), a clinical-stage biotechnology company, reported that two abstracts for iza-bren (izalontamab brengitecan), a potentially first-in-class EGFRxHER3 bispecific antibody drug conjugate (ADC), will be presented at the World Conference on Lung Cancer (WCLC) 2025 Annual Meeting taking place September 6 – 9 in Barcelona, Spain (Press release, SystImmune, SEP 2, 2025, View Source [SID1234655671]). Iza-bren is jointly developed by SystImmune and Bristol Myers Squibb under a collaboration and exclusive license agreement in territories outside of China.

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The safety and efficacy results of iza-bren as a monotherapy and in combination with Osimertinib in patients with advanced stages of EGFR mutated Non-Small Cell Lung Cancer will be presented at WCLC. The data highlights the continued progress of iza-bren clinical development and builds upon the previously reported clinical activity in lung, breast, and bladder cancer patients at ASCO (Free ASCO Whitepaper), ESMO (Free ESMO Whitepaper), and SABCS in 2023, 2024 and 2025.

"These data further enhance our confidence in iza-bren’s clinical activity across a wide range of tumors," said Jonathan Cheng, M.D., Chief Medical Officer of SystImmune. "We are particularly excited by the potential of iza-bren in combination with osimertinib as a first-line treatment for EGFR-mutated NSCLC. This approach may offer the opportunity for deeper and more durable responses in newly diagnosed patients, and we remain committed to advancing its development to address unmet needs in lung cancer."

Details of the presentations at WCLC are below:
Phase I/II Study of iza-bren (BL-B01D1) as Monotherapy in Patients with pre-treated Locally Advanced or Metastatic EGFR Mutated NSCLC
Session Title: OA10 – Optimizing Systemic Therapy; Bridging New and Old
Presentation: OA10.03
Speaker: Wenfeng Fang (Guangzhou, China)
Session Date & Time: Monday, September 8th, 2025, 3:30 PM-4:45 PM CEST

Phase II Study of iza-bren (BL-B01D1) Combo with Osimertinib in EGFR Mutated Locally Advanced or Metastatic NSCLC Patients
Session Title: OA10 – Optimizing Systemic Therapy; Bridging New and Old
Presentation: OA10.04
Speaker: Fei Zhou (Zhengzhou, China)
Session Date & Time: Monday, September 8th, 2025, 3:30 PM-4:45 PM CEST

About iza-bren
SystImmune, in collaboration with BMS outside of China, is developing iza-bren (BL-B01D1), a bispecific antibody-drug conjugate (ADC) that targets both EGFR and HER3 targets that are highly expressed in various epithelial cancers and are known to be associated with cancer cell proliferation and survival. Iza-bren’s dual mechanism of action blocks EGFR and HER3 signals to cancer cells, reducing proliferation and survival signals. In addition, upon antibody mediated internalization, iza-bren’s therapeutic payload is released causing genotoxic stress that leads to cancer cell death.