Intravesical Ty21a for the Treatment of Patients With Non-muscle-invasive Bladder Cancer (NMIBC)
- Conditions
- Non Muscle Invasive Bladder Cancer
- Interventions
- Biological: Ty21a
- Registration Number
- NCT03421236
- Lead Sponsor
- Patrice Jichlinski
- Brief Summary
Bladder cancer is the fourth and eighth most common malignancy among men and women, respectively. About 75% of bladder cancers are diagnosed as non muscle-invasive and according to specific tumor-stage and grade characteristics, intravesical immunotherapy with Bacillus Calmette-Guérin (BCG) is used to prevent recurrence and/or progression. However, BCG immunotherapy is associated with significant adverse events and treatment failure may occur in 30-40% of cases, hence the necessity for alternative therapies. In an orthotopic MB49 mouse bladder cancer model, another bacterial vaccine (Ty21a/Vivotif) turned out to be more effective than BCG for inducing tumor regression and mice survival upon intravesical instillation; and potentially safer because Ty21a bacteria did not infect/persist in any mice tissues nor in human bladder explants or cell lines, in contrast to BCG. Ty21a/Vivotif has been used in the last 30 years in millions of individuals as an oral typhoid vaccine with a high safety record. In this phase I trial we will be testing the safety of intravesical administration of Ty21a and its effect on bladder immunity in non-muscle invasive bladder cancer (NMIBC) patients, for whom recommendation of BCG therapy is not mandatory.
- Detailed Description
Escalating doses of Ty21a/Vivotif® will be administered by the intravesical route to evaluate whether Ty21 may replace the standard BCG immunotherapy in NMIBC patients.
The minimal starting dose will be instilled intravesically once a week for 4 weeks in 3 patients. If well tolerated, a 5-fold higher dose will be instilled 4-times in 3 other patients, and so on for a maximum of 4 doses to be tested.
The maximal tolerated dose will then be administered to 3 new patients 6-times once a week. If 6 instillations are well tolerated, 7 additional patients will be included to receive 6 instillations with this maximal tolerated dose.
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- All
- Target Recruitment
- 25
- Patients with an intermediary or low risk of progression of bladder cancer (according to an EORTC score and clinical considerations) and thus not requiring BCG immunotherapy will be included after a transurethral resection of the bladder tumor (TURBT). Male and Female patients aged > 18yrs, with a Karnofsky performance status of 60% or more, sero-negative for HIV, HBV and HCV and with laboratory parameters for vital function in the normal range or with abnormalities without clinical significance may be included.
- Patients with NMIBC that require BCG treatments or with muscle-invasive bladder cancer, sero-positive for HIV, HBV and HCV or with other serious illnesses (e.g., serious infections requiring antibiotics, bleeding disorders, autoimmune disease), will be excluded.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description non muscle invasive bladder cancer patient Ty21a intravesical instillation of Ty21a in patients not requiring BCG
- Primary Outcome Measures
Name Time Method Adverse events 6 weeks safety and tolerability of intravesical Ty21a
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Dpt Urology- CHUV
🇨🇭Lausanne, Vaud, Switzerland