Sponsor: Boehringer Ingelheim (industry)
Phase: 1/2
Start date: June 28, 2024
Planned enrollment: 582
Zongertinib (BI-1810631, NSC-854531) is an investigational, orally administered tyrosine kinase inhibitor (TKI) targeting HER2 mutations in advanced solid tumors, particularly non–small cell lung cancer (NSCLC). The drug has demonstrated promising efficacy and a manageable safety profile in early-phase clinical trials.
Zongertinib selectively and irreversibly binds to the tyrosine kinase domain of HER2, inhibiting its activity while sparing wild-type epidermal growth factor receptor (EGFR). This selectivity aims to reduce EGFR-related adverse events commonly associated with other TKIs. (ascopubs.org)
In the Phase Ia portion of the Beamion LUNG-1 trial, zongertinib achieved a confirmed overall response rate (ORR) of 30% and a disease control rate (DCR) of 83% across various HER2-altered solid tumors. Specifically, among patients with NSCLC, the confirmed ORR was 35%, with a median duration of response of 12.7 months. (ascopubs.org)
The Phase Ib analysis of the same trial reported an ORR of 66.7% in Cohort 1, with tumor shrinkage observed in 94% of patients. In a randomized segment, the 120 mg and 240 mg daily doses resulted in ORRs of 72.4% and 78.2%, respectively, and DCRs of 95% and 100%. (worldpharmaceuticals.net)
Zongertinib has exhibited a manageable safety profile. In the Phase Ia study, treatment-related adverse events (TRAEs) occurred in 82% of patients, with 10% experiencing grade ≥3 TRAEs. The most common TRAEs included diarrhea (50%), rash (16%), and elevated liver enzymes. Notably, typical EGFR-related toxicities were infrequent, aligning with the drug's selective mechanism. (ascopubs.org)
In the Phase Ib cohort, any-grade TRAEs were reported in 66.7% of patients, with grade ≥3 events in 9.5%. The most common TRAEs were diarrhea (28.6%) and rash (21.4%). Dose-limiting toxicities included grade 3 febrile neutropenia and grade 4 immune thrombocytopenia. (targetedonc.com)
As of February 2025, the U.S. Food and Drug Administration (FDA) granted priority review to zongertinib for the treatment of adult patients with unresectable or metastatic NSCLC harboring HER2 mutations who have received prior systemic therapy. (pharmacytimes.com)
Last updated: Apr 2025
Goal: The primary goal of this trial is to determine the optimal tolerated dose and preliminary efficacy of zongertinib, a selective HER2 inhibitor, alone and in combination with established HER2-targeted agents, in patients with advanced HER2-positive cancers after failure of prior standard treatments.
Patients: The study includes adults (age 18 or above) with HER2-positive metastatic breast cancer or HER2-positive metastatic gastric, gastroesophageal junction, or esophageal adenocarcinoma who have experienced disease progression after standard therapy, have measurable disease, and are ECOG 0-1.
Design: This is a randomized, open-label, multicenter phase Ib/II trial. Phase Ib includes several dose-escalation cohorts to assess the safety and maximum tolerated dose of zongertinib in combination with other standard HER2-targeted regimens, while phase II uses randomized dose-optimization cohorts to further evaluate efficacy and safety.
Treatments: Investigational arms utilize zongertinib alone or in combination with trastuzumab deruxtecan (T-DXd), trastuzumab emtansine (T-DM1), trastuzumab, and/or capecitabine. Zongertinib (BI 1810631) is an oral, selective, covalent HER2 tyrosine kinase inhibitor that spares EGFR, potentially resulting in fewer off-target toxicities. Early trials in HER2-mutant NSCLC reported objective response rates up to 74%, a disease control rate above 90%, and manageable toxicity (mainly low-grade diarrhea). Standard HER2-targeted agents such as T-DXd, T-DM1, trastuzumab, and capecitabine are also included according to current best practices for HER2-positive disease.
Outcomes: In phase Ib, primary endpoints are the occurrence of dose-limiting toxicities during the initial 21 days and objective response rate. In phase II, the primary outcome is objective response per RECIST 1.1. Secondary outcomes include progression-free survival, disease control, treatment-emergent adverse events, pharmacokinetics (Cmax and AUC), and patient-reported outcomes capturing symptomatic toxicities and treatment burden.
Burden on patient: Participant burden is moderate to high, consistent with a phase 1/2 trial setting. The trial involves extra clinic visits for dose escalation and safety monitoring, frequent imaging with CT or MRI for response assessment, and multiple blood draws for pharmacokinetic analyses. Tumor biopsies (preferably from non-irradiated sites) may be required for trial entry, and patient-reported outcomes are regularly collected. Combination regimens may increase the risk of overlapping toxicities, and close monitoring is necessary. Travel to specialized centers and frequent assessments will be required, resulting in a higher burden than standard of care.
Inclusion Criteria:
* Signed and dated written Informed consent form (ICF) in accordance with International Council for Harmonisation-Good Clinical Practice (ICH-GCP) and local legislation prior to admission to the trial.
* Patients ≥18 years of age or over the legal age of consent in countries where that is greater than 18 years at the time of signature of the ICF.
* Documented Human epidermal growth factor receptor 2 overexpressing and/or amplified (HER2+), metastatic breast cancer (mBC) or metastatic gastric adenocarcinoma, gastroesophageal junction adenocarcinoma, or esophageal adenocarcinoma (mGEAC).
* For dose optimization (Phase II): Patient must provide tumor tissue from locations not radiated prior to biopsy, if possible, collected through archival tissue.
* Documented investigator assessed progression.
* Recovered from any previous therapy-related toxicity to ≤ Common Terminology Criteria for Adverse Events (CTCAE) Grade 1 at start of treatment (except for alopecia, stable sensory neuropathy, and hypothyroidism (patients on thyroid replacement therapy) which must be ≤ CTCAE Grade 2).
* Presence of at least one measurable lesion according to Response evaluation criteria in solid tumors (RECIST) 1.1, as determined by the local site investigator/radiology assessment.
* Eastern Cooperative Oncology Group (ECOG) score of 0 or 1. Further inclusion criteria apply.
Exclusion Criteria:
* Previous or concomitant malignancies other than the one treated in this trial within the previous 2 years, which require current systemic therapy except:
* effectively treated non-melanoma skin cancers
* effectively treated carcinoma in situ of the cervix
* effectively treated ductal carcinoma in situ
* other effectively treated malignancy that is considered cured by local treatment
* History or presence of cardiovascular abnormalities such as uncontrolled hypertension, congestive heart failure New York Heart Association (NYHA) classification of ≥ III or IV, unstable angina or poorly controlled arrhythmia which are considered as clinically relevant by the investigator. Myocardial infarction (or troponin levels consistent with myocardial infarction within 28 days of randomization), stroke, or pulmonary embolism within 6 months prior to randomization.
* Any clinically important abnormalities (as assessed by the investigator) in rhythm, conduction, or morphology of resting electrocardiograms, e.g. complete left bundle branch block, third degree heart block.
* Mean resting corrected QT interval (QT interval corrected for heart rate by Fridericia´s formula (QTcF)) \>470 msec.
* Any factors that increase the risk of QT interval corrected for heart rate (QTc) prolongation or risk of arrhythmic events such as heart failure, hypokalemia, congenital long QT syndrome, personal or family history of long QT syndrome or unexplained sudden death under 40 years-of-age.
* Ejection fraction \<50% or the lower limit of normal of the institutional standard within 28 days prior to randomization.
* Women who are pregnant or nursing or who plan to become pregnant or nurse during the trial or within 7 months after the last dose of trial treatment with T-DXd, T-DM1, trastuzumab or capecitabine and trastuzumab.
Further exclusion criteria apply.
Bruxelles, 1200, Belgium
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Namur, 5000, Belgium
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Liege, 4000, Belgium
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Libramont-Chevigny, 6800, Belgium
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Leuven, 3000, Belgium
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Edegem, 2650, Belgium
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Changchun, 130021, China
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Zhengzhou, 450003, China
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Tianjin, 300060, China
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Shanghai, 200032, China
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Nanjing, 210029, China
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Harbin, 150081, China
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Changchun, 130012, China
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Hangzhou, 310000, China
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Strasbourg, 67200, France
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Toulouse, 31059, France
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Marseille Cedex 9, 13273, France
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Lyon, 69008, France
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Dijon, 21000, France
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Caen, 14076, France
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Bordeaux cedex, 33076, France
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Paris, 75020, France
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Rennes cedex, 35042, France
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Saint Herblain, 44800, France
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Essen, 45136, Germany
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Dresden, 01307, Germany
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Hamburg, 22763, Germany
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Rozzano, 20089, Italy
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Milano, 20141, Italy
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Milano, 20132, Italy
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Candiolo (TO), 10060, Italy
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Foggia, 71122, Italy
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Misterbianco (CT), 95045, Italy
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Napoli, 80131, Italy
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Osaka-shi, 541-8567, Japan
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Kanagawa, Yokohama, 241-8515, Japan
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Kashiwa-shi, 277-8577, Japan
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Kyoto, Kyoto, 606-8507, Japan
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Tokyo, Koto-ku, 135-8550, Japan
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Aichi, Nagoya, 464-8681, Japan
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Kagoshima-shi, 892-0833, Japan
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Kanagawa, Isehara, 259-1193, Japan
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Seongnam-si, 13496, Korea, Republic of
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Seoul, 03722, Korea, Republic of
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Seoul, 05505, Korea, Republic of
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Madrid, 28022, Spain
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Barcelona, 08003, Spain
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Barcelona, 08036, Spain
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L'Hospitalet de Llobregat, 8906, Spain
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Madrid, 28007, Spain
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Sevilla, 41009, Spain
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Valencia, 46009, Spain
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London, EC1A 7BE, United Kingdom
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Orange, California, 92868, United States
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Los Angeles, California, 90067, United States
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Indianapolis, Indiana, 46250, United States
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Iowa City, Iowa, 52242, United States
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Seattle, Washington, 98109, United States
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