NCT07525869Recruiting
An Open-label Prospective Study to Evaluate the Efficacy and Safety of Pegfilgrastim in Triple-Negative Breast Cancer Patients Receiving AC Regimen Following Paclitaxel and Carboplatin as Neoadjuvant Therapy
Source: ClinicalTrials.gov · Last updated 20 Apr 2026
Brief summary (registry, in English)
This open-label, prospective, single-arm clinical study aims to evaluate the efficacy and safety of pegfilgrastim in preventing febrile neutropenia (FN) among patients with triple-negative breast cancer (TNBC) receiving anthracycline/cyclophosphamide (AC) chemotherapy following neoadjuvant paclitaxel/carboplatin therapy. In the Keynote-522 regimen, paclitaxel and carboplatin are administered prior to the AC phase, which may increase cumulative myelosuppression and subsequently elevate the risk of FN during AC. Despite this clinical concern, real-world evidence supporting the prophylactic use of pegfilgrastim in Korean patients undergoing this regimen remains insufficient. A total of 40 adult TNBC patients will be enrolled. Pegfilgrastim 6 mg will be administered subcutaneously once per cycle on Day 2 of each AC cycle (Cycles 1-4), approximately 24 hours after chemotherapy completion. The primary objective is to assess the incidence of FN during the four AC cycles. Secondary objectives include hospitalization due to FN, incidence of Grade 4 neutropenia, delays or dose reductions in chemotherapy due to neutropenia, and evaluation of hematologic and non-hematologic toxicities. This study is descriptive in nature and does not involve hypothesis-testing sample size calculations. The sample size of 40 was determined based on feasible drug supply and is expected to provide clinically meaningful insight when compared with existing real-world data, in which the FN risk during AC without prophylactic G-CSF is historically reported at approximately 20-25%. The findings from this study may offer essential clinical evidence supporting the preventive use of pegfilgrastim during the AC phase in TNBC patients treated with the paclitaxel/carboplatin-leading neoadjuvant regimen.
- Status (registry)
- Recruiting
- Study type
- Interventional
- Enrollment
- 40 (estimated)
- First submitted
- 22 Mar 2026
- Start date
- 28 Oct 2025
- Primary completion date
- 27 Oct 2026
- Lead sponsor
- Yonsei University
- Diseases
- Triple-negative breast cancer
- NCT number
- NCT07525869
What you commit to
- Study type: Interventional
- Planned participants: 40
- From 28 Oct 2025 to the primary completion date, 27 Oct 2026
- 2 sites in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- 1\. Prior treatment with cytotoxic chemotherapy. 2. Prior treatment with G-CSF or pegylated G-CSF. 3. History of conditions that may affect bone marrow function (e.g., severe liver or kidney disease).
- 4\. Receipt of radiotherapy within 4 weeks prior to study initiation. 5. Active uncontrolled infection or inflammatory disease that may affect study outcomes.
- 6\. Receipt of blood transfusion within 60 days prior to study initiation. 7. Pregnant, breastfeeding, or unwilling to use appropriate contraception. 8. Any condition judged by the investigator to make the patient unsuitable for participation.
Who the study is looking for
- 1\. Women diagnosed with triple-negative breast cancer by pathology or cytology. 2. Age ≥19 and ≤70 years. 3. ECOG performance status 0-1. 4. Stage II-III breast cancer confirmed pathologically or clinically. 5. Planned to receive AC chemotherapy following paclitaxel/carboplatin as neoadjuvant therapy.
- 6\. Adequate organ function:
- Absolute neutrophil count (ANC) ≥1,000 cells/mm³
- Platelet count ≥75,000 cells/mm³
- Creatinine clearance ≥50 mL/min or serum creatinine \<1.5× ULN
- Total bilirubin ≤1.5× ULN
- AST ≤2.5× ULN
- ALT ≤2.5× ULN 7. Ability to provide written informed consent and willingness to comply with study procedures.
Age in the registry: 19 years to 70 years · Sex: All · Does not accept healthy volunteers
Sites (2)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Gangnam Severance Hospital, Yonsei University Health System Coordinator of this site? Confirm its status | Seoul | South Korea | Recruiting |
| Severance Hospital, Yonsei University Health System Coordinator of this site? Confirm its status | Seoul | South Korea | Recruiting |
This page is information, not medical advice. Discuss any trial with your doctor.