RC48 Combined With Toripalimab and Radiotherapy for Bladder Sparing Treatment in MIBC

NCT ID: NCT05979740

Last Updated: 2023-08-31

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: PHASE2
• Total Enrollment: 6 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2023-08-01
• Study Completion Date: 2024-02-13

Brief Summary

This is a prospective, open, single-center clinical study of RC48 combined with PD-1 and radiotherapy as bladder-preserving therapy in patients with muscular invasive bladder uroepithelial carcinoma with high HER-2 expression (IHC 2+ or 3+). The study was conducted in accordance with the Good Practice for Clinical Trials of Pharmaceutical Products (GCP). Six patients were enrolled in this study. Each patient received RC48 injection [2.0 mg/kg, Q2W, iv] and Toripalimab injection [3mg/kg, Q2W, iv] for 1~2 cycles, and radiotherapy at the second or third cycle. The total dose of bladder irradiation field was greater than 50Gy (about 30 times), and the safety monitoring of the subjects was conducted within 28 days after receiving the study drug treatment for the first time. Adverse events were graded using the National Cancer Institute (NCI) Standard for the Assessment of Common Terminology for Adverse Events (CTCAE) Version 5.0 guidelines, and the occurrence of DLT in patients was observed. If the subject does not complete the safety assessment for the tolerance observation period for non-dose tolerance reasons, a new subject will be replaced.

Detailed Description

This is a prospective, open, single-center clinical study of RC48 in combination with PD-1 and radiotherapy as bladder-preserving therapy in patients with muscular invasive bladder uroepithelial carcinoma with high HER-2 expression (IHC 2+ or 3+). The study was conducted in accordance with the Good Practice for Clinical Trials of Pharmaceutical Products (GCP).

Subjects undergo maximum transurethral electrocystotomy (TURBT) or partial cystectomy, imaging diagnosis, and pre-treatment biological samples of blood, urine, and biopsy tissue. The researchers determined that localized invasive bladder cancer with high HER-2 expression could be treated with bladder conserving therapy with maximum TURBT. Patients will receive RC48 combined with PD-1 and radiotherapy after TURBT surgery. Subjects should receive RC48 combined with PD-1 every two weeks for 12 treatment cycles and radiotherapy (bladder irradiation field greater than 50Gy). After completion of the above treatment, tumor site pathology, imaging, and exfoliation cytology are obtained with diagnostic TURBT for tumor evaluation to determine complete remission, and the first tumor efficacy evaluation is performed after completion of radiotherapy (12 weeks after treatment) and every 12 weeks after completion of radiotherapy. Patients with radiotherapy intolerance (as assessed by the investigator) were discontinued directly.

Adverse events will be monitored during the study period and graded using the National Cancer Institute's (NCI) Standards for the Assessment of Adverse Events in General Terminology (CTCAE) Version 5.0 guidelines. The safety assessment was carried out after 28 days.

Subjects who discontinue medication for reasons other than disease progression will be followed for post-treatment disease status until subjects begin other antitumor therapy, develop disease progression, withdraw informed consent, die, or end of the study, whichever occurs first. All subjects will be followed up via outpatient cystoscopy (every 3 months within 1 year of withdrawal and every 6 months after 1 year) until subject's death, withdrawal of informed consent, or the end of the study, whichever occurs first.

Participation in this study will require participants to submit a TURBT tumor tissue specimen or a newly obtained tumor lesion biopsy from prior untreated radiation therapy for biomarker and efficacy correlation evaluation.

Blood and urine samples from patients will be collected during the treatment to explore potential biomarkers correlated to the treatment efficacy and patient response.

Conditions

Muscle Invasive Bladder Cancer; HER2 Expression; Radiotherapy; PD-1; Antibody-drug Conjugates

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

RC48+Toripalimab+Radiotherapy

RC48: 2.0 mg/kg, Q2W, iv; Toripalimab: 3mg/kg, Q2W, iv; Radiotherapy: total dose was greater than 50Gy (about 30 times).

Group Type: EXPERIMENTAL

Disitamab Vedotin and Toripalimab

Intervention Type: DRUG

Each patient received RC48 injection \[2.0 mg/kg, Q2W, iv\] and Toripalimab injection \[3mg/kg, Q2W, iv\] for 1\~2 cycles, and Radiotherapy radiotherapy at the second or third cycle. The total dose of bladder irradiation field was greater than 50Gy (about 30 times), and the safety monitoring of the subjects was conducted within 28 days after receiving the study drug treatment for the first time.

Interventions

Disitamab Vedotin and Toripalimab

Each patient received RC48 injection \[2.0 mg/kg, Q2W, iv\] and Toripalimab injection \[3mg/kg, Q2W, iv\] for 1\~2 cycles, and Radiotherapy radiotherapy at the second or third cycle. The total dose of bladder irradiation field was greater than 50Gy (about 30 times), and the safety monitoring of the subjects was conducted within 28 days after receiving the study drug treatment for the first time.

Intervention Type: DRUG

Other Intervention Names

RC48, JS001

Eligibility Criteria

Inclusion Criteria

ECOG PS: 0～1；Subjects underwent TURBT surgery or partial cystectomy and imaging diagnosis, which was determined to be muscular infiltrating urothelial carcinoma of the bladder (urothelial carcinoma being the main pathological component: 50%) and planned to undergo radical total cystectomy + lymph node dissection + urine flow diversion; cT2-T4a N0 M0 (CT/MRI ± PET/CT)；Undergo TURBT or partial cystectomy；Tissue examination specimens with TURBT or partial cystectomy；Expected survival ≥3 months；Immunohistochemical staining of tissue after final TURBT or partial cystectomy showed IHC 2+ or 3+；The major organs are functioning normally, the following criteria are met:

1. The blood routine examination criteria should meet (no blood transfusion and no treatment with granulocyte colony stimulating factor within 14 days before enrollment) :

i. Absolute count of neutrophils (ANC) ≥1,000/mm3 ii. Platelet count ≥75,000/mm3 iii. Hemoglobin ≥ 8.0g /dL

2. Liver function:

i. Total bilirubin ≤1.5× prescribed ULN or direct bilirubin ≤ULN for subjects with total bilirubin levels >1.5×ULN ii. Upper limit of normal values (ULN) ≤2.5 times of alanine Aminotransferase (ALT) and aspartate Aminotransferase (AST) Note: ≤1.5× ULN (This criterion only applies to patients who have not received anticoagulant therapy; Patients receiving anticoagulant therapy should keep anticoagulants within therapeutic limits);

3. Kidney function:

The Cockcroft-Gault formula was used to determine the creatinine clearance (CrCl) > 30 mL/min.

Subjects (or their legal representatives) must sign an informed consent form (ICF) indicating that they understand the purpose and procedures of the study and are willing to participate in the study; Fertile women must have a negative pregnancy test result (beta-hCG) (urine or serum) within 7 days before the study drug is first administered.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

RenJi Hospital

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Haige Chen

Role: PRINCIPAL_INVESTIGATOR

RenJi Hospital

Locations

Renji Hospital, School of Medicine, Shanghai Jiao Tong University

Shanghai, Shanghai Municipality, China

Site Status: RECRUITING

Countries

China

Central Contacts

Haige Chen

Role: CONTACT

kirbyhaige@aliyun.com

02168383575

Ruiyun Zhang

Role: CONTACT

02168383575

Facility Contacts

haige chen, M.D

Role: primary

kirbyhaige@aliyun.com

86-21-68383575

References

Zhang L, Jin D, Zang J, Qian L, Zhang T, Wu Y, Ding Y, Xie F, Tang H, Xia J, Cao D, Zhang R, Zhuang G, Chen H. Disitamab vedotin combined with toripalimab and radiotherapy for multimodal organ-sparing treatment of muscle invasive bladder cancer: a proof-of-concept study. Neoplasia. 2025 Oct;68:101216. doi: 10.1016/j.neo.2025.101216. Epub 2025 Aug 6.

Reference Type: DERIVED

PMID: 40774226 (View on PubMed)

Other Identifiers

LY2023-002-A

Identifier Type: -

Identifier Source: org_study_id