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

NCT ID: NCT06279364

Last Updated: 2026-01-27

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE3

Total Enrollment

524 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-02-28

Study Completion Date

2026-07-31

Brief Summary

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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

Detailed Description

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This is a randomized, open-label, multicenter, Phase 3 study to evaluate the efficacy and safety of SKB264 versus investigator's choice chemotherapy as first-line treatment for patients with unresectable recurrent or metastatic TNBC whose tumors do not express PD-L1 or in patients with PD-L1 positive tumors who received prior anti-PD-1/PD-L1 inhibitor in early setting.

Conditions

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Triple Negative Breast Cancer

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Participants will be randomised in a 1:1 ratio to one of two intervention groups.
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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SKB264

Participants will receive SKB264 on Day 1 and Day 15 of each 4-week cycle

Group Type EXPERIMENTAL

SKB264

Intervention Type DRUG

IV Infusion

Investigator's choice chemotherapy

If no prior taxane, or prior taxane in the (neo)adjuvant setting and disease-free interval (DFI) \>12 months: paclitaxel or nab-paclitaxel.

If prior taxane and DFI ≤ 12 months: capecitabine, eribulin. If known BRCA1/2 mutation: carboplatin

Group Type ACTIVE_COMPARATOR

Paclitaxel

Intervention Type DRUG

IV Infusion.

Nab-paclitaxel

Intervention Type DRUG

IV infusion.

Capecitabine

Intervention Type DRUG

Tablet. Oral route of administration.

Eribulin

Intervention Type DRUG

IV infusion.

Carboplatin

Intervention Type DRUG

IV infusion.

Interventions

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SKB264

IV Infusion

Intervention Type DRUG

Paclitaxel

IV Infusion.

Intervention Type DRUG

Nab-paclitaxel

IV infusion.

Intervention Type DRUG

Capecitabine

Tablet. Oral route of administration.

Intervention Type DRUG

Eribulin

IV infusion.

Intervention Type DRUG

Carboplatin

IV infusion.

Intervention Type DRUG

Eligibility Criteria

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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.

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.
Minimum Eligible Age

18 Years

Maximum Eligible Age

75 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Sichuan Kelun-Biotech Biopharmaceutical Co., Ltd.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Fudan University Shanghai Cancer Center

Shanghai, Shanghai Municipality, China

Site Status RECRUITING

Countries

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China

Central Contacts

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Xiaoping Jin, PhD

Role: CONTACT

86-028-67255165

Facility Contacts

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Zhimin Shao

Role: primary

Other Identifiers

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SKB264-Ⅲ-11

Identifier Type: -

Identifier Source: org_study_id

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