QL1706 Plus Chemotherapy as Neoadjuvant Therapy in Triple-Negative Breast Cancer

This is a single-center, single-arm, prospective study enrolling 30 patients with stage II-III triple-negative breast cancer. The neoadjuvant regimen consists of QL1706 combined with carboplatin plus albumin-bound paclitaxel (21-day cycles for 4 cycles) followed by QL1706 combined with doxorubicin/epirubicin plus cyclophosphamide (21-day cycles for 4 cycles). The treatment observation period is 1 year, and the primary endpoint is the pathological complete response rate.

Study Overview

• Status: Recruiting
• Conditions: Triple Negative Breast Cancer (TNBC)
• Intervention / Treatment: Drug: Immunotherapy combined with chemotherapy

• Study Type: Interventional
• Enrollment (Estimated): 30
• Phase: Phase 2

Contacts and Locations

• Study Contact: Name: Liu Fan; Phone Number: 86+18912250939; Email: lflove2009@126.com

Study Locations

• China
  • Jiangsu
    • Nantong, Jiangsu, China
      • Recruiting
      • Affiliated Hospital of Nantong University
      • Contact: Phone Number: 0513 8505 2222

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Histologically or cytologically confirmed newly diagnosed ER-/HER2- breast cancer. ER and PR with Allred score <3 or <1% positively stained cells in tumor infiltrating components. HER2 negativity defined as 0 or 1+ by FISH or IHC staining per NCCN guidelines;
2. Clinical stage II or III breast cancer eligible for neoadjuvant chemotherapy (per AJCC 8th edition: at least T2 any N M0, or any T if N+), with treatment goal of complete surgical resection following neoadjuvant therapy;
3. Tumor size ≥2 cm by clinical or imaging assessment per WHO criteria. Patients with histologically confirmed or clinically palpable lymph nodes are eligible regardless of tumor size;
4. Treatment-naïve subjects;
5. Age ≥18 years, both genders eligible;
6. ECOG performance status 0-1;
7. Adequate bone marrow, cardiac, and organ function;
8. Women of childbearing potential must have a negative pregnancy test (serum or urine HCG) within 30 days prior to study enrollment and must practice effective contraception during the study;
9. Ability to comprehend and provide written informed consent.

Exclusion Criteria:

1. History of invasive malignancies within 5 years prior to signing the informed consent form, except for adequately treated basal cell carcinoma, squamous cell skin cancer, or carcinoma in situ of the cervix;
2. Subjects who have received chemotherapy, immunotherapy, targeted therapy, or radiotherapy within the past 12 months;
3. Stage IV metastatic breast cancer;
4. Administration of a vaccine within 30 days before the first dose of the study treatment;
5. Subjects with severe systemic diseases;
6. Subjects with active infections (including but not limited to HIV, hepatitis B or C, tuberculosis);
7. Severe cardiovascular diseases, such as: history of myocardial infarction, acute coronary syndrome, or coronary angioplasty/stenting/bypass grafting within the past 6 months; or congestive heart failure (CHF) of New York Heart Association (NYHA) class II-IV, or history of CHF NYHA class III or IV;
8. Lactating women should discontinue breastfeeding during the study;
9. Subjects with known allergies to the study drug or any of its excipients;

10. Any other condition deemed inappropriate for participation in the study by the investigator.

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Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: experimental group; QL1706 plus carboplatin and albumin-bound paclitaxel (21-day cycles for 4 cycles) followed by QL1706 plus doxorubicin/epirubicin and cyclophosphamide (21-day cycles for 4 cycles)	Drug: Immunotherapy combined with chemotherapy; Albumin-bound paclitaxel: 125 mg/m², day 1 and day 8, 21-day cycle; Carboplatin: AUC = 5, day 1 or AUC = 2-3, day 1 and day 8, 21-day cycle; QL1706: 5 mg/kg, day 1, 21-day cycle; Epirubicin: 90-100 mg/m², day 1, 21-day cycle; or Doxorubicin: 50 mg/m², day 1, 21-day cycle; Cyclophosphamide: 600 mg/m², day 1, 21-day cycle.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Pathologic complete response (pCR) rates	pCR rate (ypT0/Tis ypN0) is defined as the percentage of participants without residual invasive cancer on hematoxylin and eosin evaluation of the complete resected breast specimen and all sampled regional lymph nodes following completion of neoadjuvant systemic therapy by current American Joint Committee on Cancer (AJCC) staging criteria assessed by the local pathologist at the time of definitive surgery.	Up to approximately 9 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Objective response rate（ORR）	Percentage of Participants With an Objective Response of CR or PR According to RECIST v1.1	Up to approximately 27-30 weeks
3y-EFS	Percentage of patients who, from the initiation of treatment, remain free of any of the following events within three years: disease progression to unresectable status, local or distant recurrence, development of a second primary malignancy (breast cancer or other cancers), or death from any cause.	Up to approximately 3 years
Overall survival (OS)	OS is defined as the time from the initiation of treatment to death due to any cause. Participants without documented death at the time of the analysis will be censored at the date of the last follow-up.	Up to approximately 8 years
Adverse events	AEs will be assessed according to NCI CTCAE v5.0, by grade	up to 18 months

Collaborators and Investigators

• Sponsor: Affiliated Hospital of Nantong University

Study record dates

Study Major Dates

• Study Start (Actual): February 25, 2026
• Primary Completion (Estimated): December 25, 2027
• Study Completion (Estimated): December 25, 2028

Study Registration Dates

• First Submitted: January 8, 2026
• First Submitted That Met QC Criteria: January 8, 2026
• First Posted (Actual): January 15, 2026

Study Record Updates

• Last Update Posted (Actual): March 2, 2026
• Last Update Submitted That Met QC Criteria: February 26, 2026
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms by Site; Neoplasms; Skin Diseases; Breast Diseases; Breast Neoplasms; Skin and Connective Tissue Diseases; Triple Negative Breast Neoplasms; Therapeutics; Drug Therapy
• Other Study ID Numbers: 2025-K223-02

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No