Precise Neoadjuvant Chemoresection of Low Grade NMIBC

Bladder Cancer Clinical Trial

— POLO  

Official title:

Precise Neoadjuvant Chemoresection of Low Grade NMIBC Guided by Drug Screens in Patient Derived Organoidst: A Single Center, Open-label, Phase II Trial

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT06227065
• Other study ID #: SZB-URO-24-001
• Status: Not yet recruiting
• Phase: Phase 2
• Start date: October 2024
• Est. completion date: October 2029

Study information

• Verified date: January 2024
• Source: University of Bern
• Contact: Roland Seiler, Prof.
• Phone: +41 32 324 32 06
• Email: urologie[@]szb-chb.ch
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Based on the unmet clinical need to reduce invasiveness of treatment of low grade NMIBC, the investigators conduct this prospective, open label, single arm and single center phase II trial. The investigators aim to use drug screens in PDOs to guide neoadjuvant intravesical instillation therapy with either Epirubicin, Mitomycin C, Gemcitabine or Docetaxel to achieve chemoresection NMIBC.

Description:

Bladder cancer is a disease of the elderly patient and related to several interventions and operations. Patients with a low risk non-muscle invasive bladder cancer (NMIBC) are treated by transurethral resection of the bladder tumor (TURBT). Due to the high recurrence rate of approximately 50% within 2 years of diagnosis, patients are followed in outpatient clinic by cystoscopy for at least 5 years.

Beside recurrence of low grade NMIBC to low grade disease, progression to higher grade or stage is infrequent to rare. Therefore, expectant management and actives surveillance seems to be an option for selected patients that are unfit for surgery. Moreover, intravesical chemoresection has been attempted in order to avoid surgery. However, all patients were treated with the same chemotherapeutic agent and anticipated response rates were missed.

At least four different drugs have been used in daily routine and/or clinical trials for instillation therapies in NMIBC. Namely, Epirubicin, Mitomycin C, Gemcitabine and Docetaxel have been investigated and administered.

The molecular landscape of NMIBC is heterogeneous. Not only the mutational pattern but also the transcriptomic characteristics vary between different NMIBC. Although different agents are used on a routine daily bases and in clinical trials, they have not been administered based on the molecular landscape or biological likelihood of response.

The investigators recently developed a pipeline for the generation of patient derived organoids (PDO) in NMIBC. In brief: The bladder cancer is sampled during TURBT. Generation of organoids has been carefully optimized in order to yield high viability from each sample. Beside confirmation of similarities of the molecular landscape between parental NMIBC and subsequent PDO (in approx. 30 samples), the investigators established a standardized protocol to perform drug screens on these PDOs.

In this trial (POLO Trial) the investigators aim to generate PDOs from bladder cancer biopsies that are harvested in the outpatient clinic. Subsequent drug screen in PDOs for Epirubicin, Mitomycin C, Gemcitabine and Docetaxel will identify the most effective agent in this given patient. Prior TURBT, patient will receive 6 intravesical instillations with the identified agent as neoadjuvant treatment in order to perform chemoresection of the tumor. Three months after initial diagnosis, TURBT will be performed as the standard treatment and to confirm response rate of precise chemoresection.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 28
• Est. completion date: October 2029
• Est. primary completion date: October 2026
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Age = 18 years

• Signed Informed Consent Form

• ECOG performance status of 0 or 1

• Previous history of low risk non-muscle invasive urothelial carcino-ma of the bladder with recurrent papillary tumor and negative urine cytology or Primary solitary papillary tumor, <3cm and negative urine cytology

Exclusion Criteria:

• Known previous high grade and/or intermediate or high risk non-muscle invasive bladder cancer

• Anticoagulation other than acetylsalicylic acid

• Previous Intravesical biological/immuno- (BCG) therapy

• Evidence of significant uncontrolled concomitant disease that could affect compliance with the protocol

Related Conditions & MeSH terms

• Bladder Cancer
• Non-muscle Invasive Bladder Cancer
• Urinary Bladder Neoplasms

Intervention

Drug:
• Epirubicin
In PDOs from patients that show highest response to Epirubicin, this drug will be instilled intravesically once weekly for 6 times. Epirubicin will be used as a concentrate for injection/instillation 2 mg/ml in total 50mg per vial. Prior to use, the concentrate for injection is diluted with 25ml of 0.9% saline solution to obtain the final Solution with 1mg/ml of Epirubicin.
• Mitomycin
In PDOs from patients that show highest response to Mitomycin, this drug will be instilled intravesically once weekly for 6 times. Mitomycin C will be used as 20mg dry powder. Prior to use, the powder will be dissolved in 50ml of 0.9% saline solution according to the manufacturer instructions
• Gemcitabine
In PDOs from patients that show highest response to Gemcitabine, this drug will be instilled intravesically once weekly for 6 times. Gemcitabine will be used as 2000 mg/50ml. For intravesical application, 1000mg of gemcitabine (corresponding to 25ml) will be diluted in 25ml 0.9% saline solution, to obtain the gemcitabine concentration of 1000mg/50ml used for instillation.
• Docetaxel
In PDOs from patients that show highest response to Docetaxel, this drug will be instilled intravesically once weekly for 6 times. Docetaxel will be used as 140mg/7ml solution. For intravesical application, 48.825ml of saline will be added to 1.875ml Docetaxel solution (according 37.5mg of Docetaxel). The concentration of this solution is 0.74mg/ml by a total volume of the instillation solution of 50,7.

Locations

Country	Name	City	State
Switzerland	Roland Seiler	Biel

Sponsors (2)

Lead Sponsor	Collaborator
University of Bern	Spitalzentrum Biel

Country where clinical trial is conducted

Switzerland, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Pathological response	Rate of patients that show complete pathological response to neoadjuvant chemoresection	15 weeks
Secondary	Number of patients with recurrence free survival	Recurrence after neoadjuvant chemoresection and transurethral resection of the bladder tumor	1 Year
Secondary	Tolerability of instillation	Composite endpoint determined by standardized questionnaires (EORTC QLQ-C30, QLQ-NMIBC24 and IPSS)	15 weeks
Secondary	Feasibility of drug screen	Rate of patients in which drug screen in patient derived organoids was successful	4 weeks