Clinical trial · Interventional
Study of Patritumab Deruxtecan Plus Pembrolizumab With Other Anticancer Agents in Participants With High-Risk Early-Stage Triple-Negative or Hormone Receptor-Low Positive/HER-2 Negative Breast Cancer (MK-1022-010, HERTHENA-Breast-03)
An Open-label Randomized Phase 2 Study to Evaluate Safety and Efficacy of Patritumab Deruxtecan Plus Pembrolizumab Administered Either Before or After Carboplatin/Paclitaxel Plus Pembrolizumab Compared With Pembrolizumab in Combination With Chemotherapy Followed by Surgery and Adjuvant Pembrolizumab for High-Risk Early-Stage Triple-Negative or Hormone Receptor-Low Positive/Human Epidermal Growth Factor Receptor-2 Negative Breast Cancer (HERTHENA-Breast03)
NCT06797635CI-TRIAL-00112218recruitingPhase 2ClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 11, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260911-000001
Summary
Brief summary (as posted)
Researchers are looking for new ways to treat triple-negative breast cancer (TNBC) and hormone receptor (HR) low positive/human epidermal growth factor receptor-2 (HER2) negative breast cancer. The main goals of this study are to learn: * About the safety of the study treatments and if people tolerate them * If people who receive patritumab deruxtecan, pembrolizumab, and chemotherapy before surgery have fewer cancer cells removed during surgery compared to those who receive only pembrolizumab (pembro) and chemotherapy.
Conditions
Conditions (2)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Breast Cancer | Malignant Breast Neoplasm | CURATED_EXACT | 0.92 |
| Breast Neoplasms | Breast Neoplasm | ONTOLOGY_EXACT | 0.98 |
Interventions
Interventions (9)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Capecitabine | Drug | Capecitabine | ALIAS |
| Carboplatin | Drug | Carboplatin | ALIAS |
| Cyclophosphamide | Drug | Cyclophosphamide | ALIAS |
| Doxorubicin hydrochloride | Drug | Doxorubicin | ALIAS |
| Epirubicin hydrochloride | Drug | Epirubicin | ALIAS |
| Olaparib | Drug | Olaparib | ALIAS |
| Paclitaxel | Drug | Paclitaxel | ALIAS |
| Patritumab deruxtecan | Biological | Patritumab Deruxtecan | ALIAS |
Design
Arms and outcomes
Arms (4)
- type
- EXPERIMENTAL
- label
- Part 1, A: Pembrolizimab + patritumab deruxtecan → Pembrolizumab + paclitaxel + carboplatin
- description
- In Part 1, participants receive neoadjuvant pembrolizumab 200 mg via intravenous (IV) infusion every 3 weeks (Q3W) plus patritumab deruxtecan via IV infusion Q3W for 12 weeks, followed by pembrolizumab 200 mg via IV infusion Q3W plus paclitaxel 80 mg/m\^2 via IV infusion every week (QW) and carboplatin AUC1.5 mg/ml/min via IV infusion QW for 12 weeks. At 3 to 6 weeks after last dose of neoadjuvant treatment, participants will undergo surgery for their breast cancer.
- interventionNames
- Biological: Patritumab deruxtecan
- Biological: Pembrolizumab
- Drug: Paclitaxel
- Drug: Carboplatin
- type
- EXPERIMENTAL
- label
- Part 2, A: Pembrolizimab + patritumab deruxtecan → Pembrolizumab + paclitaxel + carboplatin
- description
- In Part 2, participants receive neoadjuvant pembrolizumab 200 mg IV infusion every Q3W plus patritumab deruxtecan (dose to be determined in part 1) IV infusion Q3W for 12 weeks, followed by pembrolizumab 200 mg IV infusion Q3W plus paclitaxel 80 mg/m\^2 IV infusion QW and carboplatin AUC1.5 mg/ml/min IV infusion QW for 12 weeks. At 3-6 weeks after last dose of neoadjuvant treatment, participants undergo surgery for breast cancer. After surgery, participants receive adjuvant pembrolizumab 400 mg IV every 6 weeks (Q6W) for \~30 weeks. Additional adjuvant treatment of physician's choice (TPC) may be given to participants with residual disease. TPC options are olaparib 300 mg oral twice daily (BID) for 1 year (participants with germline BRCA mutation \[gBRCAm\] only), capecitabine 1000-1250 mg/m\^2 oral BID days 1-14 and 22-35 Q6W for 4 six-week cycles or doxorubicin 60mg/m\^2 (or epirubicin 90 mg/m\^2) IV Q3W or every 2 weeks (Q2W) and cyclophosphamide 600 mg/m\^2 IV Q3W or Q2W for 4 doses.
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Has locally advanced, non-metastatic (M0), breast cancer, defined as any of the following combined primary tumor (T) and regional lymph node (N) staging per current American Joint Committee on Cancer (AJCC) criteria: cT1c, N1-N2; cT2, N0-N2; cT3, N0-N2; or cT4a-d, N0-N2 * Has centrally confirmed diagnosis of breast cancer that is triple-negative or HR-low+/HER2- breast cancer that will be treated according to the triple-negative breast cancer (TNBC) paradigm * Participants who are Hepatitis B surface antigen (HBsAg) positive are eligible if they have received Hepatitis B virus (HBV) antiviral therapy for at least 4 weeks and have undetectable HBV viral load * Participants with a history of Hepatitis C virus (HCV) infection are eligible if HCV viral load is undetectable * Has an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 within 28 days prior to allocation/randomization * Has left ventricular ejection fraction (LVEF) of ≥50% or ≥ lower limit of normal (LLN) as assessed by echocardiogram (ECHO) or multigate acquisition scan (MUGA) scan Exclusion Criteria: The main exclusion criteria include but are not limited to the following: * Has uncontrolled or significant cardiovascular disease before randomization * Has any history of or evidence of any current leptomeningeal carcinomatosis. * Has clinically significant corneal disease * Has human immunodeficiency virus (HIV) infection with a history of Kaposi sarcoma and/or multicentric Castleman disease * Has evidence of ongoing, uncontrolled, systemic bacterial, fungal, or viral infection * Has received prior therapy with an anti-programmed death (PD)-1, anti-PD-L1, or anti-PD-L2 agent, or with an agent directed to another stimulatory or coinhibitory T-cell receptor * Has received any prior treatment, including radiation, systemic therapy, and/or definitive surgery for currently diagnosed breast cancer * Has received prior treatment with an anti-human epidermal growth factor receptor 3 (HER3) antibody and/or antibody-drug conjugate (ADC) that consists of an exatecan derivative that is a topoisomerase I inhibitor (e.g., trastuzumab deruxtecan) * Has metastatic (Stage IV) breast cancer or cN3 nodal involvement * Has known additional malignancy that is progressing or has required active treatment within the past 5 years * Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis * Has any history of interstitial lung disease (ILD)/pneumonitis irrespective of steroid use, or current or suspected ILD * Has an active infection requiring systemic therapy * Has concurrent active HBV and HCV infection * Has clinically severe respiratory compromise resulting from intercurrent pulmonary illness
References
Publications (0)
Data not yet available
No reference posted for this study.