A Study to Investigate the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of SIM0237 Alone or in Combination with BCG in NMIBC

Official title

An Open-Label, Multicenter Phase 1 Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of SIM0237 Alone or in Combination with BCG in Non-Muscle-Invasive Bladder Cancer

Overview

This is an open-label, multicenter phase 1 study to evaluate the safety, efficacy, and pharmacokinetics (PK) characteristics of SIM0237 alone or in combination with bacillus Calmette-Guerin (BCG) in participants with Non-Muscle-Invasive Bladder Cancer (NMIBC)

Detailed description

The study starts with a dose escalation part followed by a dose expansion part. The primary objective of the dose escalation part is to evaluate the safety and tolerability of SIM0237 alone or in combination with BCG, and determine the recommended dose(s) (RD). The primary objective of the dose expansion part is to evaluate the preliminary efficacy of SIM0237 alone or in combination with BCG.

Interventions

• Drug SIM0237
  Several dose levels of SIM0237 will be administered as a single agent for evaluation
• Drug SIM0237 and BCG
  Several dose levels of SIM0237 will be administered in combination with a fixed dose of BCG for evaluation
• Drug SIM0237
  RD level of SIM0237 will be administered as a single agent for evaluation
• Drug SIM0237 and BCG
  RD level of SIM0237 will be administered in combination with a fixed dose of BCG for evaluation

Primary outcome measures

• Dose escalation:Dose limited toxicity (DLT) [Time frame: DLT observation period (up to 21 days)]
• Dose escalation: Percentage of participants experiencing treatment-emergent adverse events (TEAEs) [Time frame: through study completion, an average of 5 years]
• Dose expansion:Complete response (CR) rate at Month 3 [Time frame: through study completion, an average of 5 years]
• Dose escalation: Percentage of participants experiencing AE related dose interruptions and dose delays, dose intensity [Time frame: through study completion, an average of 5 years]

Eligibility criteria

Inclusion criteria

• Written informed consent.
• ≥ 18 years of age, male or female.
• • Histologically confirmed presence of BCG-unresponsive CIS (with or without Ta or T1 disease) or histologically confirmed presence of BCG-unresponsive high-grade Ta or T1 disease. Histologic confirmation of urothelial carcinoma (mixed histology tumors allowed if urothelial histology is predominant histology).
• Dose escalation phase: BCG-unresponsive high-risk NMIBC.
• Dose expansion phase: a) Cohorts 1 and 3: BCG-unresponsive CIS (with or without Ta or T1 disease); b) Cohort 2 and 4: BCG-unresponsive high-risk Ta or T1 disease.
• Absence of resectable disease after transurethral resection (TURBT) procedures \[residual carcinoma in situ (CIS) acceptable\]. patients with T1 tumors must undergo repeat resection and pathological test if initial pathological test sample did not include muscularis propria, to ensure the inclusive of muscularis propria and the absence of invasive tumor.
• Not suitable for or unwilling to undergo radical cystectomy.
• ECOG performance status of 0, 1or 2.
• Life expectancy ≥ 2 years.
• Adequate hematologic and organ function.
• Women of childbearing potential (WOCBP) must have a negative serum pregnancy test. WOCBP and male subjects agree to use adequate contraception.
• Tumor tissue (archival or fresh) for biomarker analysis.

Exclusion criteria

• • Subjects received TURBT or other surgical treatment for bladder lesions or pelvic radiotherapy or interventional therapy within 2 weeks prior to the first dose.
• Previous treatment with: a) IL-15 or IL-2; b) immune checkpoint inhibitors (such as anti-PD-1 or PD-L1 antibodies), ADCs, chemotherapies, oncolytic viruses, BCG or other anti-tumor treatments, unless there is clear evidence of disease persistence/recurrence/progression after the above treatments and beyond 4 weeks prior to the first dose; c) Chinese herbal medicine treatment beyond 2 weeks prior to the first dose is allowed; d) A single immediate instillation of chemotherapy within 4 weeks prior to the first dose is allowed; e) intravesical instillation of mucosal protective agents (e.g., sodium hyaluronate) are allowed.
• Subject is participating in an investigational drug or investigational device study.
• Subjects have not recovered from AEs caused by previous anti-tumor treatment.
• History/evidence of prior muscle-invasive, locally advanced, metastatic bladder cancer or upper urinary tract (kidney, renal pelvis, ureter) and prostatic urethral tumors; or evidence of Ta/T1/CIS urothelial transitional cell carcinoma outside the bladder (urethra, ureter, renal pelvis) during the screening period.
• Patients with other malignancies within 5 years before the first dose.
• Any active infection or urinary tract infection requiring systemic treatment by intravenous infusion within 2 weeks before the first dose.
• Subjects with clinically significant cardiovascular disease within 6 months before the first dose of study treatment.
• Known human immunodeficiency virus (HIV) infection or known acquired immunodeficiency syndrome (AIDS).
• Active or chronic hepatitis B or hepatitis C infection.
• Known or suspected active autoimmune diseases.
• Concurrent use of any other anticancer therapy or chronic use of systemic corticosteroids at immunosuppressive doses (more than 10 mg/day prednisone or equivalent).
• History of pneumonitis or interstitial lung disease or severe obstructive pulmonary disease that requires oral or intravenous steroids to help recover.
• Known to be allergic or intolerant to study drugs, monoclonal antibodies, excipients; or allergic or intolerant to BCG (only for subjects receiving combined BCG therapy)
• Subjects discontinued prior BCG treatment due to AEs such as toxemia, systemic infection, or urinary incontinence (only for subjects receiving combined BCG therapy).
• History of allogeneic organ transplantation or graft-versus-host disease.
• Any live vaccines within 4 weeks before the first dose.
• Known mental illness or substance abuse that would interfere with trial complies.
• Subject is pregnant or lactating, or is expected to become pregnant or parent a child during the planned study period.
• Other conditions that investigators consider inappropriate for inclusion.

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation

Non-randomized

Model

Sequential

Masking

Open label

Primary purpose

Treatment

Study locations

China · 14 centers

• Peking University Third Hospital — Beijing
• Sun Yat-sen University Cancer Center — Guangzhou
• Harbin Medical University Cancer Hospital — Haerbin
• Henan Cancer Hospital Affiliated Cancer Hospital of Zhengzhou University — Zhengzhou
• Renmin Hospital of Wuhan University — Wuhan
• Hunan Cancer Hospital — Changsha
• Qilu Hospital of Shandong University — Jinan
• The Affiliated Hospital of Qingdao University — Qingdao
• … and 6 more centers

Identifiers

NCT: NCT06186414 · SIM0237-102

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗