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OncoMatch/Clinical Trials/NCT06274515

A Study to Investigate Mechanisms of Resistance to Breast Cancer Therapies

Is NCT06274515 recruiting? Yes, currently enrolling (May 2026). This Phase 4 trial studies non-drug interventions for breast cancer.

Phase 4RecruitingHoffmann-La RocheNCT06274515Data as of May 2026

This study will evaluate mechanisms of resistance to anti-breast cancer therapies in tumor and blood samples from participants with human epidermal growth factor receptor (HER2) positive, hormone receptor (HR) positive or triple negative breast cancer.

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Extracted eligibility criteria

Cancer type

Breast Carcinoma

Biomarker criteria

Required: HER2 (ERBB2) overexpression

Diagnosis of HER2+ ... breast cancer

Required: ESR1 expression

Diagnosis of ... HR+ (for cohort R1) ... breast cancer

Required: PR (PGR) expression

Diagnosis of ... HR+ (for cohort R1) ... breast cancer

Required: ESR1 loss

triple negative breast cancer (for cohort T1)

Required: PR (PGR) loss

triple negative breast cancer (for cohort T1)

Required: HER2 (ERBB2) wild-type

triple negative breast cancer (for cohort T1)

Structured fields extracted by AI. May contain errors — verify against the official protocol.

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