Testing ZW191 for advanced solid tumors

A Phase 1, Open-label, Multicenter Study to Assess the Safety, Tolerability, Pharmacokinetics, and Preliminary Anti-tumor Activity of Ascending Doses of a Folate Receptor Alpha Antibody Drug Conjugate, ZW191, in Participants With Advanced Solid Tumors

Phase 1 Interventional Zymeworks BC Inc. · NCT06555744

This study is testing a new drug called ZW191 to see if it is safe and can help people with advanced solid tumors like ovarian, endometrial, and lung cancers.

Quick facts

PhasePhase 1
Study typeInterventional
Enrollment145 (estimated)
Ages18 Years and up
SexAll
SponsorZymeworks BC Inc. Industry-sponsored
Locations17 sites (New Haven, Connecticut and 16 other locations)
Trial IDNCT06555744 on ClinicalTrials.gov

What this trial studies

This study evaluates the safety and tolerability of ZW191 in participants with advanced solid tumors, including ovarian, endometrial, and non-small cell lung cancers. The trial is divided into two parts: the first part focuses on assessing safety, while the second part explores the potential anti-tumor activity of the drug. Participants must have measurable disease and meet specific health criteria to be eligible for the study.

Who should consider this trial

Good fit: Ideal candidates are individuals with pathologically confirmed advanced solid tumors that are locally advanced, recurrent, or metastatic.

Not a fit: Patients with additional malignancies requiring active treatment or those who have previously received specific antibody drug conjugate treatments may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for patients with advanced cancers.

How similar studies have performed: Other studies have shown promise with similar approaches, but the specific application of ZW191 is novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Pathologically or cytologically confirmed diagnosis of cancers with evidence of locally advanced (unresectable), recurrent and/or metastatic disease.
* Measurable disease per RECIST v1.1.
* Eastern Cooperative Oncology Group (ECOG) Performance Status score of 0 or 1.
* Adequate cardiac function: Cardiac left ventricular function, as defined by left ventricular ejection fraction (LVEF) ≥ 50% as determined by either echocardiogram (ECHO) or multigated acquisition scan (MUGA).
* Other adequate organ function.

Exclusion Criteria:

* Known additional malignancy that is progressing or requires active treatment or may interfere with study endpoints.
* Has received prior Topoisomerase I inhibitor(TOPO1i) antibody drug conjugate treatment, regardless of washout period.
* Acute or chronic uncontrolled renal disease, pancreatitis, or liver disease.
* Severe chronic or active infections (including known active SARS-CoV-2 infection) requiring systemic therapy, including antibacterial, antifungal, or antiviral therapy.

Where this trial is running

New Haven, Connecticut and 16 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Advanced Solid TumorsAdvanced or Metastatic CancersADCFolate alpha receptor
Last reviewed 2026-06-09 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.