On October 13, 2025 Zai Lab Limited (NASDAQ: ZLAB; HKEX: 9688) reported that a late-breaking abstract (LBA) featuring new data from its global Phase 1 clinical trial (NCT06179069) evaluating zocilurtatug pelitecan (zoci), formerly known as ZL-1310, has been selected for an oral presentation at the AACR (Free AACR Whitepaper)-NCI-EORTC AACR-NCI-EORTC (Free AACR-NCI-EORTC Whitepaper) International Conference on Molecular Targets and Cancer Therapeutics (EORTC-NCI-AACR) (Free ASGCT Whitepaper) (Free EORTC-NCI-AACR Whitepaper), taking place October 22-26, 2025, in Boston, Massachusetts (Press release, Zai Laboratory, OCT 13, 2025, View Source [SID1234656606]). The presentation will include additional follow-up from patients from the ongoing trial.

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Zoci is the Company’s potential first- and best-in-class, Delta-like ligand (DLL3)-targeted antibody-drug conjugate (ADC) being developed for patients with extensive-stage small cell lung cancer (ES-SCLC). The ongoing Phase 1 study is evaluating the safety and antitumor activity of zoci at various doses in patients who have progressed after at least one prior platinum-based chemotherapy regimen. The study is being conducted across multiple global sites.

"The critical need for expanded treatment options for patients with small cell lung cancer propels our strategy to advance zoci as a novel therapeutic option as quickly as possible," said Rafael G. Amado, M.D., President, Head of Global Research and Development, Zai Lab. "We remain on track to initiate our Phase 3 registrational study in previously treated SCLC by year-end. We look forward to sharing updated results demonstrating zoci’s continued potential at the AACR (Free AACR Whitepaper)-NCI-EORTC International Conference."

Zai Lab will hold an investor conference call and webcast to highlight updated zoci data at the AACR (Free AACR Whitepaper)-NCI-EORTC International Conference and outline next steps in clinical development.

Details regarding the webcast and conference call are as follows:

Date/Time: October 24, 2025, at 11 a.m. ET / 11 p.m. HKT, please register at:
Webcast presentation (preferred): View Source
Dial-in: View Source
Presenter: Rafael G. Amado, M.D., President and Head of Global Research and Development, Zai Lab

Details regarding the zoci oral presentation are as follows:

Title: Phase 1 trial of ZL-1310, a DLL3-targeted ADC, in patients with previously treated extensive-stage small cell lung cancer
Presenter: Grace K. Dy, M.D., Roswell Park Comprehensive Cancer Center, Buffalo, NY
Session Title: Plenary Session 3: Antibody Drug Conjugates
Date/Time: Friday, October 24, 2025, 9:17 a.m. – 9:27 a.m. ET (presentation), 9:27 a.m. – 9:45 a.m. ET (panel discussion)
Location: Hynes Convention Center, Level 3, Ballroom AB

About Small Cell Lung Cancer and Zocilurtatug Pelitecan (zoci)

Small cell lung cancer (SCLC) is one of the most aggressive and lethal solid tumors, accounting for ~15% of the approximately 2.5 million patients diagnosed with lung cancer worldwide each year1,2. Additionally, two-thirds of all SCLC patients are diagnosed at extensive stage3.

DLL3 is an antigen overexpressed in many neuroendocrine tumors, such as SCLC, and is often associated with poor clinical outcomes. Zocilurtatug pelitecan (zoci), formerly known as ZL-1310, comprises a humanized anti-DLL3 monoclonal antibody connected via a cleavable linker to a novel camptothecin derivative (a topoisomerase 1 inhibitor) as its payload. The compound was designed with a novel ADC technology platform called TMALIN, which leverages the tumor microenvironment to overcome challenges associated with first-generation ADC therapies.

Zoci received an Orphan Drug Designation from the U.S. Food and Drug Administration (FDA) in January 2025, recognizing its potential to treat patients with SCLC.

About the Webcast and Conference Call

All participants must use the link provided above to complete the online registration process in advance of the conference call. Dial-in details will be in the confirmation email which the participant will receive upon registering.

A replay will be available shortly after the call and can be accessed by visiting the Company’s website.