NCT07272603

Bladder Perfusion of Plasma-Activated Saline for Bladder Cancer

Preliminary Clinical Study Evaluating the Therapeutic Response and Safety of Intravesical Perfusion With Plasma-Activated Saline Solution in Patients With Bladder Cancer

• Status: Not Yet Recruiting
• Phase: EARLY_Phase 1
• Study type: Interventional
• Enrollment: 5 (estimated)
• Sponsor: Qilu Hospital of Shandong University · Academic / Other
• Sex: All
• Age: 18 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

This preliminary clinical study evaluates the safety and initial efficacy of a novel therapy called Plasma-Activated Saline Solution (PASS) for bladder cancer patients. The study involves a one-week course of PASS administered via bladder infusion in five pre-surgical patients, using imaging and pathology analyses to assess tumor shrinkage and cancer cell death, while closely monitoring for any adverse reactions to explore the therapy's future potential.

Detailed description

This study is a prospective, proof-of-concept clinical trial investigating a novel local therapy for bladder cancer. The intervention involves the use of Plasma-Activated Saline Solution (PASS), a liquid infused with reactive oxygen and nitrogen species (RONS) created by exposing standard saline to cold atmospheric plasma. The goal is to leverage the potential of these activated substances to selectively target and kill cancer cells while minimizing damage to healthy bladder tissue. The study will enroll a small cohort of five adult patients with confirmed bladder cancer who are already scheduled for a radical cystectomy (surgical removal of the bladder). This design allows for a direct assessment of the treatment's effect on the tumor within a short, controlled timeframe before surgery. Participants will receive intravesical (into the bladder) instillations of PASS every other day for one week, with each instillation retained for approximately one hour. The primary objectives are twofold. First, to evaluate the treatment's efficacy, researchers will quantitatively measure the reduction in tumor volume using MRI scans conducted before and after the 7-day treatment period. Additionally, the surgically removed bladder tissue will be analyzed in the laboratory using immunohistochemistry to look for biological evidence of cancer cell death (apoptosis). Second, the study will rigorously assess safety and tolerability. This includes monitoring for severe, procedure-related adverse events and systematically tracking patient-reported symptoms like urinary pain and urgency using standardized diaries and scales. As an initial exploratory investigation, this study is not designed to prove definitive clinical efficacy but to gather crucial first-in-human data on the biological activity and safety profile of PASS. The findings will determine whether this innovative approach warrants further development in larger clinical trials. The study will be conducted under strict ethical guidelines with close safety monitoring and full informed consent from all participants.

Conditions

• Bladder (Urothelial, Transitional Cell) Cancer

Interventions

Type	Name	Description
DRUG	Plasma-Activated Saline Solution (PASS) Bladder Instillation	This intervention is distinguished by its unique mechanism of action, which utilizes physically-activated normal saline infused with reactive oxygen and nitrogen species (RONS) generated by non-thermal plasma, creating a potent yet transient cytotoxic solution that is administered locally.

Timeline

• Start date: 2025-12-15
• Primary completion: 2026-02-15
• Completion: 2026-02-15
• First posted: 2025-12-09
• Last updated: 2025-12-09