Study of JSKN016 Combination Therapy in Inoperable Locally Advanced or Metastatic HER2-Negative Breast Cancer

NCT ID: NCT06942234

Last Updated: 2025-09-17

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

PHASE1/PHASE2

Total Enrollment

180 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-06-01

Study Completion Date

2027-12-31

Brief Summary

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This study aims to evaluate the safety and effectiveness of JSKN016 in combination with different treatments for patients with HER2-negative breast cancer that cannot be removed by surgery or has spread to other parts of the body. The study includes four groups of patients based on treatment history and tumor characteristics. Each group will receive JSKN016 with chemotherapy or immunotherapy. The goal is to find out how well the treatment works and how safe it is.

Detailed Description

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This clinical study investigates the safety and efficacy of JSKN016 combined with various therapies for patients with advanced, inoperable, or metastatic HER2-negative breast cancer. The study includes four groups with different treatment regimens, targeting HR+HER2-negative breast cancer and triple-negative breast cancer (TNBC) with varying prior treatments. Participants will receive JSKN016 in combination with paclitaxel, capecitabine, eribulin, or pembrolizumab. The primary endpoint is the objective response rate (ORR) based on RECIST 1.1 criteria. The secondary endpoints include efficacy, safet, and other related outcomes.

Conditions

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Inoperable Locally Advanced HER2-Negative Breast Cancer Metastatic HER2-Negative Breast Cancer

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Cohort 1: JSKN016+Paclitaxel

JSKN016 (5mg/kg IV Q3W D1) + nab-paclitaxel (125mg/m² IV Q3W D1, D8)

Group Type EXPERIMENTAL

JSKN016

Intervention Type DRUG

JSKN016 is administered via intravenous infusion at doses of 5mg/kg or 6mg/kg every 3 weeks, starting on Day 1 of each cycle. If the 5mg/kg dose is well tolerated during the safety lead-in phase, the dose may be increased to 6mg/kg for subsequent cycles.

Paclitaxel (albumin bound)

Intervention Type DRUG

The drug is administered intravenously at a dose of 125mg/m², with infusions on Day 1 and Day 8 of each treatment cycle. The treatment cycle is repeated every 3 weeks.

Cohort 2: JSKN016+Capecitabine

JSKN016 (5mg/kg IV Q3W D1) + capecitabine (1000mg/m² PO BID Q3W D1-14)

Group Type EXPERIMENTAL

JSKN016

Intervention Type DRUG

JSKN016 is administered via intravenous infusion at doses of 5mg/kg or 6mg/kg every 3 weeks, starting on Day 1 of each cycle. If the 5mg/kg dose is well tolerated during the safety lead-in phase, the dose may be increased to 6mg/kg for subsequent cycles.

Capecitabine

Intervention Type DRUG

The drug is administered orally at a dose of 1000mg/m², twice daily for two weeks, followed by a one-week break. Treatment cycles repeat every three weeks.

Cohort 3: JSKN016+Eribulin

JSKN016 (5mg/kg IV Q3W D1) + eribulin (1.4mg/m² IV Q3W D1, D8)

Group Type EXPERIMENTAL

JSKN016

Intervention Type DRUG

JSKN016 is administered via intravenous infusion at doses of 5mg/kg or 6mg/kg every 3 weeks, starting on Day 1 of each cycle. If the 5mg/kg dose is well tolerated during the safety lead-in phase, the dose may be increased to 6mg/kg for subsequent cycles.

Eribulin

Intervention Type DRUG

The drug is administered intravenously at a dose of 1.4mg/m², with infusions on Day 1 and Day 8 of each treatment cycle. The treatment cycle is repeated every 3 weeks.

Cohort 4: JSKN016+Pembrolizumab/Toripalimab

JSKN016 (5mg/kg IV Q3W D1) + pembrolizumab (200mg IV Q3W D1) or toripalimab (240mg IV Q3W D1).

Group Type EXPERIMENTAL

JSKN016

Intervention Type DRUG

JSKN016 is administered via intravenous infusion at doses of 5mg/kg or 6mg/kg every 3 weeks, starting on Day 1 of each cycle. If the 5mg/kg dose is well tolerated during the safety lead-in phase, the dose may be increased to 6mg/kg for subsequent cycles.

Pembrolizumab

Intervention Type DRUG

The drug is administered intravenously at a fixed dose of 200mg, with infusions on Day 1 of each 3-week treatment cycle.

Interventions

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JSKN016

JSKN016 is administered via intravenous infusion at doses of 5mg/kg or 6mg/kg every 3 weeks, starting on Day 1 of each cycle. If the 5mg/kg dose is well tolerated during the safety lead-in phase, the dose may be increased to 6mg/kg for subsequent cycles.

Intervention Type DRUG

Capecitabine

The drug is administered orally at a dose of 1000mg/m², twice daily for two weeks, followed by a one-week break. Treatment cycles repeat every three weeks.

Intervention Type DRUG

Paclitaxel (albumin bound)

The drug is administered intravenously at a dose of 125mg/m², with infusions on Day 1 and Day 8 of each treatment cycle. The treatment cycle is repeated every 3 weeks.

Intervention Type DRUG

Eribulin

The drug is administered intravenously at a dose of 1.4mg/m², with infusions on Day 1 and Day 8 of each treatment cycle. The treatment cycle is repeated every 3 weeks.

Intervention Type DRUG

Pembrolizumab

The drug is administered intravenously at a fixed dose of 200mg, with infusions on Day 1 of each 3-week treatment cycle.

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

1. Capable of understanding and signing the informed consent form.
2. Aged ≥18 and ≤75 years, regardless of sex.
3. Histologically or cytologically confirmed inoperable locally advanced or metastatic HER2-negative breast cancer.
4. Hormone receptor-positive participants with progression/intolerance after standard endocrine therapy, or unsuitable for it.
5. Disease progression confirmed by radiological evidence post-systemic treatment.
6. Available archived or newly obtained tumor tissue/biopsy.
7. No prior systemic therapy for advanced disease, except for prior endocrine ± targeted therapy or CDK4/6 inhibitors.
8. Measurable non-CNS lesion per RECIST 1.1.
9. Expected survival ≥3 months.
10. ECOG performance status of 0 or 1.
11. Contraceptive use agreement for fertile participants.
12. Adequate organ function within 7 days of enrollment:

* Bone marrow: ANC ≥1.5 × 10⁹/L, Hemoglobin ≥90 g/L, Platelets ≥100 × 10⁹/L.
* Liver: Bilirubin ≤1.5 × ULN, ALT/AST ≤3 × ULN.
* Renal: Creatinine ≤1.5 × ULN or Ccr ≥60 mL/min.
* Coagulation: INR/PT ≤1.5 × ULN, APTT ≤1.5 × ULN.
13. LVEF ≥50%.

Exclusion Criteria

1. CNS metastasis (except stable cases treated with radiation or surgery).
2. Unstable spinal cord compression or untreated history.
3. Recent live vaccine (except seasonal flu vaccines).
4. Recent anti-tumor treatment within 28 days or 5 half-lives (whichever is shorter).
5. Recent palliative therapy within 14 days.
6. Major surgery within 28 days or planned during the study.
7. Severe gastrointestinal issues or recent major GI bleeding.
8. Uncontrolled pleural/peritoneal effusions or cachexia.
9. Prior HER3/TROP2-targeted therapy or topoisomerase I inhibitors.
10. Other malignancies within 5 years (except certain skin or localized cancers).
11. Current interstitial lung disease or uncontrolled infections.
12. Severe hypercalcemia or uncontrolled cancer-related pain.
13. Autoimmune diseases, unless stable with treatment.
14. Uncontrolled comorbidities (e.g., active infections, cardiovascular issues).
15. Toxicities from previous treatments not resolved to CTCAE ≤1.
16. Recent steroid use or need for systemic immunosuppressive therapy.
17. Allergy to study drug components.
18. Pregnancy or breastfeeding.
Minimum Eligible Age

18 Years

Maximum Eligible Age

75 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Jiangsu Alphamab Biopharmaceuticals 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, , China

Site Status RECRUITING

Countries

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China

Central Contacts

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Jian Zhang

Role: CONTACT

+86-21-64175590

Facility Contacts

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Jian Zhang

Role: primary

+86 18017312990

Other Identifiers

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JSKN016-202

Identifier Type: -

Identifier Source: org_study_id

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