Updated May 2026 · ClinicalTrials.gov

RECRUITINGPhase 3INTERVENTIONAL

A Study of SKB264 Versus Investigator's Choice Chemotherapy in Patients With Unresectable Recurrent or Metastatic Triple-Negative Breast Cancer

A Randomized, Open-Label, Multicenter Phase 3 Study of SKB264 Versus Investigator's Choice Chemotherapy as First-Line Treatment in Patients With Unresectable Recurrent or Metastatic Triple-Negative Breast Cancer

A Study of SKB264 Versus Investigator's Choice Chemotherapy in Patients With Unresectable Recurrent or Metastatic Triple-Negative Breast Cancer (NCT06279364) is a Phase 3 interventional studying Triple Negative Breast Cancer, sponsored by Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd.. RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

About This Trial

The aim of the study is to evaluate the efficacy and safety of SKB264 as first-line treatment for patients with unresectable recurrent or metastatic triple-negative breast cancer (TNBC) whose tumors do not express programmed cell death ligand 1 (PD-L1) or in patients with PD-L1 positive tumors who received prior anti-programmed cell death 1 (PD-1)/PD-L1 inhibitor in early setting

What Stage of Research Is This?

Phase 3 trials confirm efficacy and safety in large patient groups (often 300–3,000+) and form the evidence base for an FDA approval submission. For Triple Negative Breast Cancer, Phase 3 studies typically randomize participants between the investigational treatment and either a placebo or current standard of care. A successful Phase 3 result is the threshold most treatments need to clear before regulatory approval.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

A target enrollment of 524 participants makes this a sizable late-stage trial. Studies in this range typically have enough power to detect clinically meaningful differences from a comparator and to characterize less-common side effects.

Who May Be Eligible (Plain English)

Key Who May Qualify: 1. Histologically and/or cytologically confirmed TNBC. 2. De novo metastatic or relapsed ≥ 6 months post completion of treatment with curative intent. 3. No prior systemic anti-cancer therapy for unresectable recurrent or metastatic disease. 4. Participants whose tumours are PD-L1-negative, or participants whose tumors are PD-L1 positive and have relapsed after prior anti-PD-1/PD-L1 inhibitor for early-stage disease. 5. At least one measurable lesion per RECIST v1.1. 6. Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 with no worsening within 2 weeks prior to randomization. 7. A expected to live at least 3 months. 8. Eligible for the chemotherapy options listed as investigator's choice chemotherapy (paclitaxel, nab-paclitaxel, capecitabine, eribulin, or carboplatin) as assessed by the investigator. 9. Adequate organ and bone marrow function. Key Who Should NOT Join This Trial: 1. Active second malignancy. 2. Uncontrolled or clinical significant cardiovascular disease. 3. History of noninfectious pneumonitis/interstitial lung disease (ILD) that required steroids or has current pneumonitis/ILD. 4. Active infection requiring systemic therapy within 2 weeks of randomization. 5. Active hepatitis B or hepatitis C virus infection. 6. Human weakened immune system virus (HIV) positive or history of acquired weakened immune system syndrome (AIDS); known active syphilis infection. 7. Known hypersensitivity to SKB264 or its excipients. 8. Previously received TROP2-targeted therapy or topoisomerase 1 inhibitors. 9. Prior treatment with the same investigator's choice chemotherapy (except taxane). 10. Pregnant or lactating women. Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language

Key Inclusion Criteria: 1. Histologically and/or cytologically confirmed TNBC. 2. De novo metastatic or relapsed ≥ 6 months post completion of treatment with curative intent. 3. No prior systemic anti-cancer therapy for unresectable recurrent or metastatic disease. 4. Participants whose tumours are PD-L1-negative, or participants whose tumors are PD-L1 positive and have relapsed after prior anti-PD-1/PD-L1 inhibitor for early-stage disease. 5. At least one measurable lesion per RECIST v1.1. 6. Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 with no worsening within 2 weeks prior to randomization. 7. A life expectancy of at least 3 months. 8. Eligible for the chemotherapy options listed as investigator's choice chemotherapy (paclitaxel, nab-paclitaxel, capecitabine, eribulin, or carboplatin) as assessed by the investigator. 9. Adequate organ and bone marrow function. Key Exclusion Criteria: 1. Active second malignancy. 2. Uncontrolled or clinical significant cardiovascular disease. 3. History of noninfectious pneumonitis/interstitial lung disease (ILD) that required steroids or has current pneumonitis/ILD. 4. Active infection requiring systemic therapy within 2 weeks of randomization. 5. Active hepatitis B or hepatitis C virus infection. 6. Human immunodeficiency virus (HIV) positive or history of acquired immunodeficiency syndrome (AIDS); known active syphilis infection. 7. Known hypersensitivity to SKB264 or its excipients. 8. Previously received TROP2-targeted therapy or topoisomerase 1 inhibitors. 9. Prior treatment with the same investigator's choice chemotherapy (except taxane). 10. Pregnant or lactating women.

Treatments Being Tested

DRUG

SKB264

IV Infusion

DRUG

Paclitaxel

IV Infusion.

DRUG

Nab-paclitaxel

IV infusion.

DRUG

Capecitabine

Tablet. Oral route of administration.

DRUG

Eribulin

IV infusion.

DRUG

Carboplatin

IV infusion.

Locations (1)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

Fudan University Shanghai Cancer Center

Shanghai, Shanghai Municipality, China

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT06279364), the sponsor (Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd.), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT06279364 clinical trial studying?

Who can participate in NCT06279364?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT06279364?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT06279364. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT06279364. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.