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Study details
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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)

Merck Sharp & Dohme LLC
NCT IDNCT06797635ClinicalTrials.gov data as of Apr 2026
Phase

Phase 2

Target enrollment

372

Study length

about 9.8 years

Ages

18+

Locations

8 sites in CA, IL, MT +4

What this study is about

This trial is testing a treatment with patritumab deruxtecan, pembrolizumab, and other anticancer agents in people with high-risk early-stage triple-negative or hormone receptor-low positive/HER-2 negative breast cancer. The goal is to learn about the safety of these treatments and 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.

Simplified from trial records by PatientMatch.

What you may be asked to do

  • 1.Receive Patritumab deruxtecan
  • 2.Receive Pembrolizumab
  • 3.Take Capecitabine
  • +3 more

Participation Burden

What's physically and logistically required of participants.

Logistics & Travel
In-person visits

Requires travel to a study site

Physical Intervention
OralInjection / IV

How treatment is administered

Treatment Assignment
Randomized (Open Label)

You are randomly assigned, but you will know your treatment.

Extracted study details

Pulled from the trial record to show what is being tested and what the study is measuring.

Drug classes

capecitabine, carboplatin, cyclophosphamide (Alkylating chemotherapy; crosslinks DNA strands), Antineoplastic Agent [TC] (Topoisomerase 2 Inhibitors), Antineoplastic Agent [TC] (Immunologic Adjuvants), olaparib, paclitaxel (Taxane chemotherapy; stabilizes microtubules), pembrolizumab (Immune checkpoint inhibitor; blocks PD-1 to boost T-cell attack on cancer)

Drug routes

oral (Oral Tablet), infusion, oral, injection, intravenous

Endpoints

Primary: Part 1: Number of Participants Experiencing an Adverse Event (AE), Part 1: Number of Participants who Discontinued Study Treatment Due to an AE, Part 2: Number of Participants Experiencing an AE, Part 2: Number of Participants who Discontinued Study Treatment Due to an AE

Secondary: Part 2: Event-Free Survival (EFS), Part 2: Overall Survival (OS)

Body systems

Oncology