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"H3RAKLES": Tucatinib and trastuzumab in HER3-mutant and HER2-not amplified metastatic breast cancer

Status
Not yet recruiting
Phases
Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-519624-24-00
Acronym
IC 2024-01
Enrollment
20
Registered
2025-09-11
Start date
Unknown
Completion date
Unknown
Last updated
2025-09-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

HER3-mutant and HER2-not amplified metastatic breast cancer

Brief summary

Clinical benefit rate (CBR), defined as the proportion of patients who achieved a complete response (CR), a partial response (PR), or had stable disease (SD) for 24 weeks or more, according to the investigator-assessed RECIST v1.1 criteria.

Detailed description

Progression-free survival (PFS), defined as the time from inclusion to progression or death; Objective response rate, defined as the proportion of patients who achieved a CR or PR according to the investigator-assessed RECIST v1.1 criteria; and duration of response, defined as the time between the first observation of a PR or a CR, and progressive disease or death, Adverse Events (AEs) and Serious Adverse Events (SAEs), per CTCAE v5.0, considered by the investigator as related to trastuzumab or tucatinib., QLQ-C30 QoL questionnaire with the QLQ-BR42 module will be filled at inclusion, at cycles 1 and 3 and at the end of the treatment., Exploratory: relationship between biomarkers (including, but not limited to, DNA, RNA and proteins analyses) in blood, plasma, and/or tumor and either (1) presence of an ERBB3 mutation and (2) treatment efficacy.

Interventions

Sponsors

Institut Curie
Lead SponsorOTHER

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Clinical benefit rate (CBR), defined as the proportion of patients who achieved a complete response (CR), a partial response (PR), or had stable disease (SD) for 24 weeks or more, according to the investigator-assessed RECIST v1.1 criteria.

Secondary

MeasureTime frame
Progression-free survival (PFS), defined as the time from inclusion to progression or death; Objective response rate, defined as the proportion of patients who achieved a CR or PR according to the investigator-assessed RECIST v1.1 criteria; and duration of response, defined as the time between the first observation of a PR or a CR, and progressive disease or death, Adverse Events (AEs) and Serious Adverse Events (SAEs), per CTCAE v5.0, considered by the investigator as related to trastuzumab or tucatinib., QLQ-C30 QoL questionnaire with the QLQ-BR42 module will be filled at inclusion, at cycles 1 and 3 and at the end of the treatment., Exploratory: relationship between biomarkers (including, but not limited to, DNA, RNA and proteins analyses) in blood, plasma, and/or tumor and either (1) presence of an ERBB3 mutation and (2) treatment efficacy.

Countries

France

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026