An Exploratory Study of Zanidatamab in HER2-positive Advanced Tumor After at Least One Line of Standard Therapy

June 2, 2026 updated by: Haihua Yuan
The goal of this clinical trial is to learn if Zanidatamab can treat HER2-positive advanced tumors in adults. The main question it aims to answer is: What is the objective response rate of Zanidatamab in adult patients with HER-2 positive advanced solid tumors? Participants will receive Zanidatamab intravenously on Day 1 of each 2-week treatment cycle. The dosage is 20 mg/kg per cycle.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

10

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Male or female subjects aged ≥ 18 years old.
  2. Subjects with locally advanced, unresectable or metastatic solid tumors who have progressed after ≥1 prior systemic therapy for advanced/metastatic disease, or have no available optimal alternative treatments. Qualified tumor types include but are not limited to endometrial carcinoma, urothelial carcinoma, pancreatic cancer, colorectal carcinoma (CRC), head and neck adenocarcinoma (salivary gland adenocarcinoma, lacrimal gland adenocarcinoma, adenocarcinoma of unknown primary of the neck), cervical cancer, ovarian cancer and adenocarcinoma of unknown primary. Biliary tract malignancy, lung cancer and breast cancer are excluded. For CRC patients: documented RAS status (wild-type or mutant) and wild-type BRAF; prior treatment regimen should contain fluoropyrimidine, oxaliplatin and irinotecan unless contraindicated; anti-VEGF therapy when clinically indicated; anti-PD-L1 therapy for MSI-H/dMMR tumors if clinically indicated.
  3. ECOG Performance Status 0, 1 or 2.
  4. Confirmed HER2 positivity defined as IHC 3+, or IHC 2+ with positive FISH amplification (per GC criteria).
  5. Willing and capable of providing adequate tumor specimens for central pathological re-assessment of HER2 status at institutional pathology department. Patients previously treated with HER2-ADC must provide FFPE tumor samples collected after last HER2-ADC administration. Specimens with insufficient tumor cellularity and fine-needle aspiration samples are not acceptable for HER2 testing.
  6. At least one measurable lesion at baseline per RECIST 1.1 criteria.
  7. Adequate bone marrow and organ function confirmed within 14 days prior to enrollment: Hemoglobin ≥ 9 g/dL; Platelet count ≥ 75,000/mm³; Absolute neutrophil count (ANC) ≥ 1000/mm³; Serum albumin ≥ 2.5 g/dL; PT, aPTT and INR ≤ 1.5 × ULN; AST/ALT ≤ 3 × ULN; ≤5 × ULN for subjects with liver metastasis; Total bilirubin ≤1.5 × ULN (no liver metastasis); ≤3 × ULN (baseline Gilbert syndrome or liver metastasis); Creatinine clearance ≥30 mL/min (calculated by Cockcroft-Gault formula)
  8. LVEF ≥50% evaluated via echocardiogram (ECHO) or MUGA scan within 28 days before enrollment.

Exclusion Criteria:

Subjects with any of the following conditions are ineligible:

  1. Documented spinal cord compression, leptomeningeal disease or clinically active central nervous system (CNS) metastasis.
  2. Active primary immunodeficiency, confirmed HIV infection, active HBV or HCV infection.
  3. History of non-infectious interstitial lung disease (ILD)/non-infectious pneumonia requiring steroid therapy, ongoing active ILD/non-infectious pneumonia, or suspected ILD/non-infectious pneumonia that cannot be ruled out by screening imaging.
  4. History of myocardial infarction, symptomatic congestive heart failure (CHF, NYHA Class II-IV), unstable angina, or any cardiovascular event (including stroke) within 6 months prior to enrollment.
  5. Pulmonary exclusion items: (a) Clinically significant underlying pulmonary disorders, including but not limited to pulmonary embolism within 3 months before screening, severe asthma, severe COPD, restrictive lung disease, recurrent pleural effusion; (b) Confirmed autoimmune, connective tissue or inflammatory diseases (rheumatoid arthritis, Sjögren's syndrome, sarcoidosis etc.), or suspected pulmonary involvement at screening; full disease details shall be recorded in eCRF for enrolled subjects; (c) Previous total pneumonectomy.
  6. Confirmed presence of HER2 gene mutation.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Zanidatamab
Zanidatamab is administered intravenously at a dose of 20 mg/kg on Day 1 of every 2-week treatment cycle.
Drug: Zanidatamab
Treatment continues until disease progression, intolerable toxicity, subject withdrawal or study termination.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Objective Response Rate, ORR
Time Frame: From the date of first study treatment until disease progression or death from any cause, whichever occurs first, assessed up to 24months.
The Objective Response Rate (ORR) is defined as the percentage of patients whose best response on or before the first occurrence of disease progression is a complete response (CR) or partial response (PR). Tumor responses were assessed by investigators using Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1.
From the date of first study treatment until disease progression or death from any cause, whichever occurs first, assessed up to 24months.

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Progression-Free Survival, PFS
Time Frame: Through study completion, an average of 2 years.
Progression-Free Survival (PFS) is defined as the time from the start of study treatment to the first occurrence of disease progression, or death, whichever occurs first. Tumor responses were assessed by investigators using RECIST version 1.1.
Through study completion, an average of 2 years.
Disease Control Rate, DCR
Time Frame: From the date of first study treatment until disease progression or death from any cause, whichever occurs first, assessed up to 24 months.
Disease Control Rate (DCR) is defined as the proportion of patients whose best response is CR, PR or SD maintained more than 8 weeks. Tumor responses were assessed by investigators using RECIST version 1.1.
From the date of first study treatment until disease progression or death from any cause, whichever occurs first, assessed up to 24 months.
Best Overall Response, BOR
Time Frame: Through study completion, average follow-up of 2 years.
Best overall response (BOR) is defined as the best tumor response achieved at any time during treatment, categorized as Complete Response (CR), Partial Response (PR), Stable Disease (SD), or Progressive Disease (PD) per RECIST 1.1 criteria.
Through study completion, average follow-up of 2 years.
Adverse Events, AEs
Time Frame: From first study drug administration through 40 days after the last dose; overall average follow-up duration is 2 years.
Incidence, severity (graded per NCI CTCAE version 5.0), and causality of adverse events (AEs).
From first study drug administration through 40 days after the last dose; overall average follow-up duration is 2 years.
Duration of Response, DOR
Time Frame: From the date of first documented response (complete response [CR] or partial response [PR]) to the time of disease progression or death from any cause, whichever occurs first, assessed up to 24months.
Duration of Response (DoR) is defined as the time from the date of first documented response (CR or PR) to date of first occurrence of disease progression as determined by investigators, or death from any cause, whichever occurs first.
From the date of first documented response (complete response [CR] or partial response [PR]) to the time of disease progression or death from any cause, whichever occurs first, assessed up to 24months.
Overall Survival, OS
Time Frame: Through study completion, an average of 2 years.
Overall Survival is defined as the time from the date of the first study treatment to the date of death from any cause.
Through study completion, an average of 2 years.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Haihua Yuan

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

June 15, 2026

Primary Completion (Estimated)

December 31, 2029

Study Completion (Estimated)

December 31, 2029

Study Registration Dates

First Submitted

June 2, 2026

First Submitted That Met QC Criteria

June 2, 2026

First Posted (Actual)

June 8, 2026

Study Record Updates

Last Update Posted (Actual)

June 8, 2026

Last Update Submitted That Met QC Criteria

June 2, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • JY2026-038

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Neoplasms

Clinical Trials on Zanidatamab

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Mali

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe