Personalizing breast cancer therapy: biomarker test may improve response
NCT ID NCT06441890
First seen Aug 21, 2026 · Last updated Aug 21, 2026
Summary
This phase 2 trial is testing whether using a biomarker test (MammaPrint/BluePrint) to guide treatment choices can improve outcomes for people with early-stage HER2-positive breast cancer. Participants receive standard chemotherapy (paclitaxel, nab-paclitaxel, or docetaxel) combined with targeted therapies (trastuzumab and pertuzumab) before surgery. The main goal is to see if this approach leads to a higher rate of complete tumor disappearance at the time of surgery.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- A combination of chemotherapy drugs (paclitaxel, nab-paclitaxel, or docetaxel) with targeted antibodies (trastuzumab and pertuzumab), chosen based on a tumor biomarker test.
- What this could lead to
- If successful, this approach could personalize breast cancer treatment, increasing the chance of a complete response and potentially improving long-term outcomes.
- What could go wrong
- This is a small phase 2 trial, so results may not be conclusive. The biomarker-guided approach may not improve response rates, and chemotherapy side effects remain a risk.
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 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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About 28 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Dec 2024
- Expected to finish
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Jun 2028
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
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.
Inclusion Criteria: * Age ≥ 18 years of age at time of consent * ECOG performance status 0, 1, or 2 * Histologically confirmed invasive breast cancer documented by core needle or surgical biopsy with 90 days prior to study registration. * HER2-positive by IHC or FISH according to ASCO/CAP 2018 guidelines * HER2-enriched subtype on the MammaPrint/BluePrint gene expression profile within 90 days prior to study registration. * Curative resection of primary breast tumor(s) is planned; ipsilateral axillary nodes will be sampled by sentinel lymph node biopsy or axillary dissection * Treating Oncologist recommends neoadjuvant chemotherapy * No evidence of distant metastatic disease * AJCC clinical stage: cT1c-T3, cN0-N2 * Baseline left ventricular ejection fraction (LVEF) of at least 50% on Echo or MUGA scan within 90 days prior to registration. Adequate organ function as defined below: Leukocytes ≥2,000/mm3 Platelet count ≥ 75,000/mm3 Absolute Neutrophil Count (ANC) ≥ 1,000/mm3 Hemoglobin (Hgb) ≥ 9.0 g/dL Creatinine/Calculated Creatine clearance (CrCI) Cr \< 1.5 x upper limit of normal (ULN) or CrCl ≥ 50 mL/min using the Cockcroft-Gault formula Bilirubin ≤ 1.5 × ULN. Subjects with Gilbert's syndrome may have a bilirubin \> 1.5 × ULN, if no evidence of biliary obstruction exists Aspartate aminotransferase (AST) ≤ 2.5 × ULN Alanine aminotransferase (ALT) ≤ 2.5 × ULN * Patients with synchronous bilateral primary breast tumors or multiple ipsilateral primary breast tumors are eligible if the treating Oncologist determines that the assigned treatment regimen is appropriate therapy for all primary tumors requiring chemotherapy. * Able to provide written informed consent and HIPAA authorization for release of personal health information, via an approved UIC Institutional Review Board (IRB) informed consent form and HIPAA authorization. or the Legally Authorized Representative (LAR) is able to provide consent and HIPAA authorization. * Women of childbearing potential must agree to use a barrier form of contraception if they are sexually active with a male partner and cannot be pregnant or breast-feeding. A negative serum or urine pregnancy test is required per institutional practice guidelines. * As determined at the discretion of the enrolling physician or protocol designee, ability of the subject to understand and comply with study procedures for the entire length of the study. * Patients with history of HIV/AIDS (acquired immunodeficiency syndrome) are eligible for this study if they are receiving anti-retroviral therapy and it does not include any medications known to alter metabolism or tolerability of component drugs in the protocol treatment regimen and the following criteria is met: \- Patients without a history of AIDS-defining opportunistic infections within the past 12 months. * Patients with Hepatitis B (HBV): chronic carriers of HBV infection (HBsAg-positive) or individuals who have serologic evidence of a resolved prior HBV infection (i.e., HBsAg-negative and anti-HBc-positive) are eligible if they are receiving appropriate suppressive antiviral therapy that does not include medications known to alter metabolism or tolerability of component drugs in the protocol treatment (see Appendix) prior to initiation of cancer therapy, and liver function tests meet study eligibility criteria. * Patients with Hepatitis C (HCV): patients with a history of HCV infection who have completed curative antiviral treatment are eligible if the HCV RNA viral load is below the limit of quantification within 90 days of study enrollment. Patients on concurrent HCV treatment must have HCV RNA viral load below the limit of quantification within 30 days of study enrollment. Patients must also meet liver function test eligibility requirements and antiviral therapy does not include medications known to alter metabolism or tolerability of component drugs in the protocol treatment Exclusion Criteria * Any prior therapy for this breast cancer * Active infection requiring systemic therapy at the time of study registration * Pregnant or nursing * Any prior or concurrent malignancy whose natural history or treatment has the potential to interfere with the safety or efficacy assessment of this investigational regimen, as determined by the treating medical oncologist. * Any mental or medical condition that prevents the patient from giving informed consent or participating in the trial. * Other major comorbidity (e.g., compromised liver function, major cardiovascular or cerebrovascular event within the past 6 months, uncontrolled diabetes mellitus or hypertension), as determined by treating physician. * Any contraindication for any chemotherapy drug used in the assigned regimen. * Baseline sensory neuropathy \> grade 1 * History of hypersensitivity to any of the drugs in the treatment regimen. Patients with history of hypersensitivity may be treated on this protocol with either nab-paclitaxel or docetaxel. * Prisoners
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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University of Illinois
RECRUITINGChicago, Illinois, 60612, United States
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