SynthesisClinical cancer research : an official journal of the American Association for Cancer Research2026
Zanidatamab, a Dual HER2-Targeted Bispecific Antibody, in Patients with Unresectable Locally Advanced or Metastatic HER2-Positive Salivary Gland Cancer: A Combined Analysis of Early-Phase Studies.
Synthesis in Clinical cancer research : an official journal of the American Association for Cancer Research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Phase I Trial of ZW25 in Patients With Locally Advanced (Unresectable) and/or Metastatic HER2-expressing Cancers
A Phase 1b/2, 2-part Open-label Study to Assess the Safety and Antitumor Activity of Zanidatamab in Combination With ALX148 in Advanced HER2-expressing Cancer
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12 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeHuman epidermal growth factor receptor 2 (HER2) overexpression occurs in various subtypes of salivary gland cancers (SGC) and can be associated with treatment challenges and poor clinical outcomes. Zanidatamab is a dual HER2-targeted, bispecific antibody that has demonstrated antitumor activity across multiple HER2-positive tumor types. This combined analysis aimed to assess the efficacy and safety of zanidatamab in HER2-positive SGC. PATIENTS AND
methodsAdult patients with previously treated, unresectable locally advanced or metastatic HER2-positive SGC were enrolled in three early-phase trials of zanidatamab: a first-in-human phase I study (NCT02892123), a phase I study of patients in Japan (JRCT2031210161), and a phase Ib/II study evaluating zanidatamab plus evorpacept, a high-affinity CD47 inhibitor (NCT05027139). Confirmed objective response rate (cORR) and progression-free survival (PFS) were measured in each study. Outcomes with zanidatamab monotherapy were pooled for summary analysis.
resultsTen patients with HER2-positive SGC were enrolled across trials; six patients were previously treated with HER2-targeted therapy. Among patients who received zanidatamab monotherapy (n = 9), seven experienced zanidatamab-related adverse events (all grade 1/2), the most common being diarrhea and infusion-related reactions. The cORR [95% confidence interval (CI)] was 44% (14%-79%), the median (95% CI) PFS was 10.1 (3.8-not estimable) months, and the median (range) duration of response was not reached (9.4 to 42.3+ months). All patients experienced a reduction in tumor size. One patient who received zanidatamab plus evorpacept experienced a confirmed partial response and 18.4 months of PFS.
conclusionsAlthough the sample size is small, these findings support the clinical benefit of zanidatamab treatment for HER2-positive SGC.
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