JSKN016 in Combination With D-0502 for Locally Advanced or Metastatic HR-Positive, HER2-Negative Breast Cancer

NCT ID: NCT07336771

Last Updated: 2026-01-13

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

NOT_YET_RECRUITING

Clinical Phase

PHASE1/PHASE2

Total Enrollment

60 participants

Study Classification

INTERVENTIONAL

Study Start Date

2026-01-31

Study Completion Date

2028-06-30

Brief Summary

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This is a multicenter, open-label, Phase Ib/II randomized study designed to evaluate the safety, tolerability, dose-limiting toxicities (DLTs), and preliminary antitumor activity of JSKN016 in combination with the oral selective estrogen receptor degrader (SERD) D-0502 in patients with locally advanced or metastatic hormone receptor-positive (HR+), HER2-negative breast cancer who have previously progressed on CDK4/6 inhibitor-based endocrine therapy.

Approximately 60 patients will be randomized in a 1:1 ratio to receive JSKN016 administered intravenously every 2 weeks (Q2W) or every 3 weeks (Q3W), in combination with daily oral D-0502. Each dosing cohort will include a safety lead-in phase to assess DLTs prior to cohort expansion. Tumor response will be assessed according to RECIST v1.1.

Detailed Description

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Conditions

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Metastatic Breast Cancer Locally Advanced Breast Cancer (LABC)

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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JSKN016 Q2W + D-0502

Group Type EXPERIMENTAL

JSKN016 Q2W

Intervention Type DRUG

4 mg/kg, intravenous infusion, every 2 weeks

D-0502

Intervention Type DRUG

200 mg, oral, once daily

JSKN016 Q3W + D-0502

Group Type EXPERIMENTAL

JSKN016 Q3W

Intervention Type DRUG

4 mg/kg, intravenous infusion, every 3 weeks

D-0502

Intervention Type DRUG

200 mg, oral, once daily

Interventions

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JSKN016 Q2W

4 mg/kg, intravenous infusion, every 2 weeks

Intervention Type DRUG

JSKN016 Q3W

4 mg/kg, intravenous infusion, every 3 weeks

Intervention Type DRUG

D-0502

200 mg, oral, once daily

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Age ≥18 years
* Histologically or cytologically confirmed locally advanced or metastatic HR-positive, HER2-negative breast cancer
* HR-positive defined as ER and/or PR ≥1% by IHC
* HER2-negative per ASCO/CAP guidelines
* At least one measurable extracranial lesion per RECIST v1.1
* ECOG performance status 0-1
* Prior progression on CDK4/6 inhibitor plus endocrine therapy
* Adequate organ and cardiac function
* Postmenopausal women, or premenopausal women receiving ovarian function suppression

Exclusion Criteria

* Active or untreated CNS metastases
* Prior treatment with ADCs containing topoisomerase I inhibitor payloads
* Active interstitial lung disease or pneumonitis
* Uncontrolled cardiovascular disease or active infection
* Prior malignancy within 5 years (with specific exceptions)
* Pregnancy or breastfeeding
Minimum Eligible Age

18 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

Countries

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China

Central Contacts

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Xiaowen Tang

Role: CONTACT

+86-512-62850800

Facility Contacts

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Jian Zhang

Role: primary

+86-21-64175590

Other Identifiers

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JSKN016-204

Identifier Type: -

Identifier Source: org_study_id

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