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NCT06797635PHASE2RECRUITING

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)

Sponsor: Merck Sharp & Dohme LLC + Daiichi Sankyo

No open prediction endpoints

Endpoints are classified and published by ProgramSignal analysts.

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Key Facts

Study type
INTERVENTIONAL
Conditions
Breast Neoplasms, Breast Cancer
Interventions
Patritumab deruxtecan, Pembrolizumab, Paclitaxel, Carboplatin
Enrollment
372 participants
Primary completion
Dec 2029
Study completion
Dec 2034
First posted
Jan 2025
Last updated
May 2026

Primary Endpoints (CT.gov)

Part 1: Number of Participants Experiencing an Adverse Event (AE)

Time frame: Up to ~43 weeks

Part 1: Number of Participants Who Experience One or More Dose-Limiting Toxicities (DLTs)

Time frame: Up to 21 days

Part 1: Number of Participants who Discontinued Study Treatment Due to an AE

Time frame: Up to ~30 weeks

Part 2: Pathological Complete Response (pCR) Rate Using the Definition of ypT0/Tis ypN0

Time frame: Up to ~30 weeks

Secondary Endpoints

Part 2: pCR-No Ductal Carcinoma in Situ (DCIS) Rate Using the Definition of ypT0 ypN0

Part 2: Event-Free Survival (EFS)

Part 2: Overall Survival (OS)

Eligibility Criteria

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/randomi

Read full criteria on CT.gov →

✦ Analyst Commentary

Expert commentary on why this trial matters and what to watch for.

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Source

Open on ClinicalTrials.gov