SYS6002 vs PADCEV in Patients With Advanced Urothelial Carcinoma

A Randomized, Open-Label, Controlled, Multicenter Phase 2 Trial of SYS6002 Versus PADCEV in Patients With Advanced Urothelial Carcinoma

This study is a randomized, open-label, controlled, multicenter phase II clinical trial, which aims to evaluate the safety and efficacy of SYS6002 versus enfortumab vedotin in the treatment of participants with advanced urothelial carcinoma.

This study has not yet been submitted for ethical review. The current registration is a pre-registration. Recruitment will be initiated only after formal approval is obtained from the relevant Ethics Committee or Institutional Review Board.

Study Overview

• Status: Not yet recruiting
• Conditions: Advanced Urothelial Carcinoma
• Intervention / Treatment: Drug: SYS6002; Drug: enfortumab vedotin

• Study Type: Interventional
• Enrollment (Estimated): 100
• Phase: Phase 2

Participation Criteria

Eligibility Criteria

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

Description

Inclusion Criteria:

• 1. Patients aged 18-80 years (inclusive);
• 2. Pathologically confirmed patients with advanced urothelial carcinoma who have received a platinum-based chemotherapy with anti-PD-(L)1 agent. For those who received these therapies in the adjuvant or neoadjuvant setting, disease progression must have occurred during treatment or within 12 months of treatment completion;
• 3 An archival tumor tissue sample or a fresh tissue sample should be provided;
• 4 Subjects must have measurable disease according to RECIST (version 1.1);
• 5 Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1;
• 6 Life expectancy of ≥ 3 months;
• 7 Major organ function must meet the relevant laboratory test standards for hematology, renal function, liver function, and coagulation within 7 days prior to treatment;
• 8Sexually active fertile subjects must agree to use methods of contraception during the study and at least 7 months after termination of study therapy and have a negative urine or serum pregnancy test within 7 days prior to randomization;
• 9.Willing to participate in the study, understand the study procedures, and sign a written informed consent form.

Exclusion Criteria:

• 1.Active central nervous system metastases or leptomeningeal metastasis;
• 2.Adverse events from prior anti-tumor therapy not recovered to ≤ Grade 1 (unless the investigator deems there is no safety risk)；

• 3.Any serious and/or uncontrolled concurrent illness that may interfere with patient's participation in the study:

  1. Participants with a history of severe cardiovascular disease within 6 months prior to randomization, including but not limited to:

     Severe cardiac rhythm or conduction abnormalities, such as ventricular arrhythmia and third-degree atrioventricular block requiring clinical intervention; corrected QT interval > 480 ms by Fridericia method (Fridericia formula: QTcF = QT/RR^0.33, RR = 60/heart rate); With history of myocardial infarction, unstable angina pectoris, angioplasty and coronary artery bypass surgery; New York Heart Association (NYHA) classification Grade III and above heart failure, and left ventricular ejection fraction (LVEF) < 50% in the tests and examinations during the screening period; cerebrovascular accidents; pulmonary embolisms;

  2. Other clinically significant diseases:

HbA1c > 8%; Participants with active keratitis and corneal ulcer, or fundus lesions with a risk of blindness; Grade ≥2 neuropathy prior to randomization; Severe infection within 4 weeks prior to randomization; active infection requiring systemic antibiotics, antiviral, or antifungal therapy within 2 weeks prior to randomization; Active HBV or HCV infection; History of immunodeficiency (HIV-positive, acquired or congenital immunodeficiency, etc.), or organ transplantation; History of another malignancy within 3 years prior to randomization; History of interstitial lung disease (ILD) / non-infectious pneumonia, or current ILD/non-infectious pneumonia, or imaging findings at screening that cannot rule out these conditions, except for those who are determined to be risk-free after discussion between the investigator and the sponsor; Pleural effusion, ascites or pericardial effusion with symptoms or requiring puncture or drainage within 2 weeks prior to randomization;

• 4.Use of other unmarketed clinical investigational drugs or treatments, chemotherapy, radiotherapy targeted therapy within 4 weeks prior to randomization; use of traditional Chinese medicine with anticancer indication, oral fluoropyrimidine drugs, small molecule targeted drug within 2 weeks prior to randomization; use of palliative radiation or local therapy within 2 weeks prior to randomization;with major surgery within 4 weeks prior to randomization;
• 5.Allergy to any component of SYS6002, or humanized monoclonal antibodies; investigator-determined ineligibility for enfortumab vedotin therapy.
• 6. Other conditions deemed by the investigator as unsuitable for participation in this clinical trial.

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
Active Comparator: SYS6002	Drug: SYS6002; SYS6002 by intravenous (IV)
Active Comparator: enfortumab vedotin; enfortumab vedotin monotherapy	Drug: enfortumab vedotin; 1.25 mg/kg by IV on Day 1、8、15, every 28 days.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Occurrence and frequency of Adverse Event (AE)	Up to approximately 2 years

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Overall Survival		Up to 2 years
Incidence of treatment-related peripheral neuropathy and≥1-grade worsening in treatment-related peripheral neuropathy from baseline		Up to 2 years
Incidence of treatment-related hyperglycemia		Up to 2 years
Incidence of treatment-related cutaneous adverse reactions		Up to 2 years
Objective Response Rate (ORR)	Objective response rate is defined as the percentage of participants with a confirmed complete response (CR) or partial response (PR) per RECIST v.1.1.	Up to 2 years
Duration of Response (DOR)	DOR is defined as the time from the date of the first confirmed objective response (CR or PR that is subsequently confirmed) to the date of the first documented disease progression (PD) per RECIST v1.1 or death from any cause, whichever occurs first	Up to 2 years
Disease Control Rate (DCR)	The percentage of participants who experience a best response of CR, PR or stable disease (SD).	:Up to 2 years
Progression Free Survival (PFS)	PFS is defined as the time from the date of randomization to the first documentation of PD as assessed by investigator per RECIST v.1.1, or death due to any cause, whichever occurs earlier.	Up to 2 years

Collaborators and Investigators

• Sponsor: CSPC Megalith Biopharmaceutical Co.,Ltd.

Study record dates

Study Major Dates

• Study Start (Estimated): June 20, 2026
• Primary Completion (Estimated): June 1, 2028
• Study Completion (Estimated): December 1, 2028

Study Registration Dates

• First Submitted: January 21, 2026
• First Submitted That Met QC Criteria: January 21, 2026
• First Posted (Actual): January 29, 2026

Study Record Updates

• Last Update Posted (Actual): January 29, 2026
• Last Update Submitted That Met QC Criteria: January 21, 2026
• Last Verified: January 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: enfortumab vedotin
• Other Study ID Numbers: SYS6002-00X

Drug and device information, study documents

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