DP303c Versus Trastuzumab Emtansine in in Patients With HER2-positive Advanced Breast Cancer

A Multicentre, Randomized, Open-label, Controlled Phase Ш Clinical Study to Evaluate the Efficacy and Safety of DP303c Versus Trastuzumab Emtansine in Patients With HER2-positive Advanced Breast Cancer

A Clinical Study to Evaluate the Efficacy and Safety of DP303c versus trastuzumab emtansine in patients with HER2-positive Advanced Breast Cancer

Study Overview

• Status: Not yet recruiting
• Conditions: HER2-positive Breast Cancer
• Intervention / Treatment: Drug: DP303c; Drug: trastuzumab emtansine

Detailed Description

This is a multi-centre, randomized, open-label, controlled phase Ш clinical study to evaluate the efficacy and safety of DP303c injection versus trastuzumab emtansine in in patients with HER2-positive advanced breast cancer. Patients will be treated with DP303c injection at 3.0 mg/kg or trastuzumab emtansine at 3.6 mg/kg every 3 weeks. Patients will continue to receive treatment until disease progression, intolerable toxicity, withdrawal of informed consent, death, or any other reasons for treatment discontinuation, whichever occurs first.

• Study Type: Interventional
• Enrollment (Estimated): 442
• Phase: Phase 3

Contacts and Locations

• Study Contact: Name: Clinical Trials Information Group officer; Phone Number: 86-0311-69085587; Email: ctr-contact@cspc.cn

Participation Criteria

Eligibility Criteria

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

Description

Inclusion Criteria:

• 1．Voluntarily agree to participate in the study and sign the informed consent;
• 2．Age≥18 years old;
• 3．Patients with unresectable locally advanced or metastatic breast cancer confirmed by histology;
• 4．Confirmed to be HER2 positive (HER2-positive is defined as IHC 3+ or IHC 2+ with ISH positive);
• 5．Previously received regimens containing trastuzumab and taxanes at the advanced stage of disease.
• 6．The Eastern Cooperative Oncology Group (ECOG) performance status of 0 - 2;
• 7．Patients with adequate organ functions;
• 8．Life expectancy ≥ 3 months;
• 9．Female and male patients of childbearing age must agree to take adequate contraceptive measures during the entire study period.

Exclusion Criteria:

• 1. Patients who have previously received tubulin inhibitor-loaded HER2 ADC therapy
• 2. History of any other malignant tumors within three years
• 3. With uncontrollable serous effusion within 14 days before randomization, which required frequent drainage or medical intervention.
• 4. Known contraindication to the study drugs;
• 5. Has not recovered from adverse reactions caused by previous anti-tumor treatments to ≤ Grade 1 or baseline (refer to NCI CTCAE 5.0);
• 6. NCI-CTCAE 5.0 ≥Grade 2 peripheral nephropathy occurred during previous systemic anti-tumor treatment;
• 7. Received immunotherapy, macromolecular targeted therapy or other anti-tumor biological therapy within 4 weeks before randomization, or received endocrine therapy, cytotoxic drug chemotherapy and small molecular targeted drug therapy within 2 weeks before randomization, or received traditional Chinese medicine preparations with anti-tumor indications within 2 weeks before randomization .
• 8. Major organ surgery (excluding needle biopsy) within 28 days before randomization;
• 9. Untreated (including baseline findings) or unstable cerebral parenchymal metastasis, spinal cord metastasis or compression, and cancerous meningitis.
• 10.The cumulative amount of previous exposure to anthracyclines has reached the dosage;
• 11.History of LVEF < 40%, symptomatic congestive heart failure (CHF),
• 12.Serious or uncontrolled cardiovascular disease;
• 13.History of (non-infectious) interstitial lung disease/pneumonitis requiring steroid hormone therapy;
• 14.Patients who currently have ocular diseases that require medication or surgical intervention; or unwilling to stop wearing contact lenses during the study.
• 15.Active infections requiring intravenous antibiotics, antivirals, or antifungals within 14 days before randomization;
• 16.There are other circumstances that may interfere with the subject's participation in the study procedures or do not meet the subject's maximum benefit from participating in the study or affect the study results.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: DP303c; DP303c injection, 3.0 mg/kg, Q3W.	Drug: DP303c; intravenous injection
Active Comparator: trastuzumab emtansine; trastuzumab emtansine,3.6 mg/kg, Q3W.	Drug: trastuzumab emtansine; intravenous injection; Other Names: T -DM1

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Progression-free survival (PFS) by BIRC	PFS is evaluated by a Blinded Independent Review Committee (BIRC) according to the Response Evaluation Criteria for Solid Tumors (RECIST) V1.1.	Up to approximately 4 years

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Progression-free survival (PFS) by investigator	PFS is evaluated by investigator according to the Response Evaluation Criteria for Solid Tumors (RECIST) V1.1.	Up to approximately 4 years
Overall Survival (OS)	Overall Survival	Up to approximately 4 years
Objective response rate (ORR)	ORR is evaluated by investigator and BIRC according to the Response Evaluation Criteria for Solid Tumors (RECIST) V1.1.	Up to approximately 4 years
Duration of response (DoR)	Duration of Response	Up to approximately 4 years
Incidence and severity of adverse events (AEs)	Incidence and severity of adverse events	Up to approximately 4 years

Collaborators and Investigators

• Sponsor: CSPC ZhongQi Pharmaceutical Technology Co., Ltd.

Study record dates

Study Major Dates

• Study Start (Estimated): March 1, 2024
• Primary Completion (Estimated): December 1, 2025
• Study Completion (Estimated): February 1, 2028

Study Registration Dates

• First Submitted: March 1, 2024
• First Submitted That Met QC Criteria: March 14, 2024
• First Posted (Actual): March 15, 2024

Study Record Updates

• Last Update Posted (Actual): March 15, 2024
• Last Update Submitted That Met QC Criteria: March 14, 2024
• Last Verified: December 1, 2023

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Skin Diseases; Neoplasms; Neoplasms by Site; Breast Diseases; Breast Neoplasms; Physiological Effects of Drugs; Molecular Mechanisms of Pharmacological Action; Antineoplastic Agents; Immunologic Factors; Tubulin Modulators; Antimitotic Agents; Mitosis Modulators; Antineoplastic Agents, Phytogenic; Antineoplastic Agents, Immunological; Immunoconjugates; Immunotoxins; Trastuzumab; Maytansine; Ado-Trastuzumab Emtansine
• Other Study ID Numbers: SYSA1501-009; CTR20240245 (Registry Identifier: NMPA)

Drug and device information, study documents

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