New drug cocktail aims to outsmart advanced breast cancer
NCT ID NCT04538742
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times
Summary
This study is testing the safety and effectiveness of combining trastuzumab deruxtecan (T-DXd) with other cancer drugs for people with HER2-positive metastatic breast cancer. About 245 participants will receive different drug combinations to find the best doses and see if the tumors shrink or stop growing. The goal is to improve treatment options for this advanced form of breast cancer.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- trastuzumab deruxtecan (T-DXd) combined with other anti-cancer drugs (durvalumab, paclitaxel, pertuzumab, tucatinib)
- What this could lead to
- If successful, this could point toward more effective combination treatments for HER2-positive metastatic breast cancer, potentially improving how long the disease is controlled.
- What could go wrong
- This is an early-phase trial (Phase 1b/2) with a small number of participants, so results may not apply to all patients. Combining drugs also raises the risk of side effects, and the study is not designed to prove a cure.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1/2
Runs two stages together: safety and dose first, then whether the treatment works.
- Participants
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245 people
The number who actually took part.
- Started
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Dec 2020
- Expected to finish
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Jan 2030
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Key Inclusion Criteria: * Patients must be at least 18 years of age * Pathologically documented breast cancer that: 1. Is advanced/unresectable (patients that can be treated with curative intent are not eligible) or metastatic 2. HER2-positive (IHC 3+ or IHC 2+/ISH+) based on local assessment. The local HER2 result must be from a tumour sample obtained in the metastatic setting. 3. Is documented as hormone receptor-positive (estrogen or progesterone receptor) or negative in the metastatic setting * Patient must have adequate tumor sample from the metastatic setting for biomarker assessment * ECOG Performance Status of 0 or 1 * Part 1 1. Disease progression on or after the last systemic therapy prior to starting study treatment 2. At least 1 prior treatment line in metastatic setting required. * Part 2 (Modules 0 - 5) a) No prior lines of therapy for advanced/MBC allowed * Part 2 (Module 6 and 7) a) Zero or one prior lines of therapy for advanced/MBC allowed CNS Inclusion * Modules 0 - 5 Patients must have no brain metastases or stable brain metastases. * Module 6 and 7 Patients must have untreated brain metastases not needing local therapy or previously treated brain metastases that have progressed since prior local therapy Key Exclusion Criteria: * Uncontrolled or significant cardiovascular disease * Active or prior documented (non-infectious) ILD/pneumonitis that required steroids, or suspected ILD/pneumonitis that cannot be ruled out by imaging at screening * Lung-specific intercurrent clinically significant illnesses * Uncontrolled infection requiring IV antibiotics, antivirals, or antifungals * Spinal cord compression or a history of leptomeningeal carcinomatosis * Prior treatment with immune checkpoint inhibitors * Prior treatment with an ADC containing a topoisomerase I inhibitor * Prior treatment with tucatinib CNS Exclusion * Modules 0 - 5: Has untreated brain metastasis * Module 6 and 7: Ongoing use of systemic corticosteroids for control of symptoms of brain metastases at a total daily dose of \> 2 mg dexamethasone or any brain lesion thought to require immediate local therapy
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Get notified about this study
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Research Site
Fort Myers, Florida, 33901, United States
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Research Site
St. Petersburg, Florida, 33705, United States
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Research Site
Commack, New York, 11725, United States
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Research Site
Harrison, New York, 10604, United States
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Research Site
New York, New York, 10016, United States
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Research Site
New York, New York, 10065, United States
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Research Site
Columbus, Ohio, 43219, United States
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Research Site
Nashville, Tennessee, 37203, United States
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Research Site
Fort Worth, Texas, 76104, United States
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Research Site
Fairfax, Virginia, 22031, United States
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Research Site
Melbourne, 3000, Australia
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Research Site
Barretos, 14784-400, Brazil
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Research Site
Belo Horizonte, 30150-274, Brazil
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Natal, 59075-740, Brazil
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Research Site
Porto Alegre, 90610-000, Brazil
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Research Site
Porto Alegre, 91350-200, Brazil
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Research Site
Rio de Janeiro, 20560-120, Brazil
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Research Site
São Paulo, 01317-001, Brazil
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Research Site
São Paulo, 04029-000, Brazil
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Research Site
Sorocaba, 18030-005, Brazil
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Research Site
Montreal, Quebec, H2X 0A9, Canada
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Research Site
Québec, Quebec, G1S 4L8, Canada
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Research Site
Toronto, M5G 2M9, Canada
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Research Site
Villejuif, 94805, France
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Research Site
München, 81675, Germany
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Research Site
Würzburg, 97080, Germany
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Research Site
Delhi, 110085, India
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Research Site
Gurgaon, 122001, India
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Research Site
Madurai, 625107, India
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Research Site
Mumbai, 400012, India
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Research Site
Bologna, 40138, Italy
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Research Site
Milan, 20141, Italy
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Research Site
Naples, 80131, Italy
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Research Site
Rome, 168, Italy
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Research Site
Bydgoszcz, 85-796, Poland
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Research Site
Koszalin, 75-581, Poland
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Research Site
Lodz, 90-242, Poland
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Research Site
Lublin, 20-090, Poland
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Research Site
Moscow, 105229, Russia
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Research Site
Moscow, 109240, Russia
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Research Site
Moscow, 111123, Russia
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Research Site
Moscow, 115478, Russia
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Research Site
Moscow, 117997, Russia
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Research Site
Moscow, 121205, Russia
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Research Site
Moscow, 143423, Russia
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Research Site
Saint Petersburg, 195271, Russia
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Research Site
Saint Petersburg, 196603, Russia
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Research Site
Saint Petersburg, 197758, Russia
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Research Site
Busan, 602-739, South Korea
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Research Site
Seoul, 02841, South Korea
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Research Site
Seoul, 03080, South Korea
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Research Site
Seoul, 05505, South Korea
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Research Site
Seoul, 06351, South Korea
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Research Site
Barcelona, 08003, Spain
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Research Site
L'Hospitalet de Llobregat, 08908, Spain
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Research Site
Madrid, 28007, Spain
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Research Site
Madrid, 28050, Spain
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Research Site
Seville, 41013, Spain
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Research Site
Hualien City, 970, Taiwan
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Research Site
Tainan, 704, Taiwan
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Research Site
Taipei, 10048, Taiwan
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Research Site
Taipei, 10449, Taiwan
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Research Site
Taipei, 11217, Taiwan
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Research Site
Taipei, 114, Taiwan
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Research Site
Taipei, 235, Taiwan
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Research Site
Taoyuan City, 333, Taiwan
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Research Site
Ankara, 6100, Turkey (Türkiye)
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Research Site
Edirne, 22030, Turkey (Türkiye)
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Research Site
Istanbul, 34662, Turkey (Türkiye)
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Research Site
Istanbul, 34722, Turkey (Türkiye)
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Research Site
Izmir, 35100, Turkey (Türkiye)
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Research Site
Buckhurst Hill, IG9 5HX, United Kingdom
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can an oral drug replace injections for advanced breast cancer?
- Can a Three-Drug combo crack Triple-Negative breast cancer?
- Can a blood test reveal when breast cancer treatment stops working?
- New antibody aims to preserve immune checkpoint while fighting cancer
- Zapping a few growing tumors may keep breast cancer drugs working longer
- Can a Two-Drug combo outsmart resistant breast and ovarian cancers?