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Clinical Trial Details — Status: Withdrawn

Administrative data

NCT number NCT06050954
Other study ID # 23-1026
Secondary ID
Status Withdrawn
Phase Phase 2
First received
Last updated
Start date September 2023
Est. completion date January 2032

Study information

Verified date November 2023
Source Fox Chase Cancer Center
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Platinum-based chemotherapy remains the standard of care for advanced/metastatic unresectable bladder cancer. The JAVELIN Bladder 100 and HCRN GU14-182 trials showed that maintenance immune checkpoint inhibition(ICI) for those that achieved disease control could prolong progression-free survival (overall survival benefit in JAVELIN may have been related to the lack of guaranteed crossover at time of progression). Of note, both of these studies showed consistency with regards to the magnitude of the PFS benefit which was ~40% vs ~20% at 6-months with maintenance ICI compared to BSC/placebo. Maintenance avelumab is now category 1 on the NCCN guidelines. However, some patients prefer prolonged chemotherapy responses and literature supports a treatment break without effecting longevity. The underlying risk resides in the selection of patients with some (currently difficult to diagnose) progressing rapidly. This trial proposes to use ctDNA to stratify chemo-responsive patients to active surveillance (i.e. a ctDNA responder referred to here as "ctDNA-") vs SOC maintenance pembrolizumab (ctDNA+). All patients will be treated with SOC chemotherapy and only patients with an objective (RECIST) response will be stratified. This is a non-randomized phase 2 study with two arms based on ctDNA 1. Pembrolizumab (ctDNA non-responder) maintenance therapy arm (SOC) 2. Active surveillance arm (ctDNA responders) with serial ctDNA and crossover 1st line chemotherapy is based on physician discretion choice as described in the protocol. Patients with metastatic Urothelial Cancer are enrolled prior to initiation of SOC chemotherapy. Based on ORR (CR + PR), it is estimated that 75 patients will need to enroll onto the protocol to find 25 responders for the two arms.


Recruitment information / eligibility

Status Withdrawn
Enrollment 0
Est. completion date January 2032
Est. primary completion date January 2027
Accepts healthy volunteers No
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria: 1. Histologically confirmed, unresectable locally advanced or metastatic transitional cell carcinoma of the urothelium. 2. Subjects must be deemed eligible for standard first-line platinum-based chemotherapy for advanced or metastatic urothelial cancer (e.g., as per NCCN guidelines). Eligible regimens include; dose-dense MVAC, gemcitabine + cisplatin and/or gemcitabine + carboplatin. (split-dose dosing of cisplatin for dose-dense MVAC and gemcitabine + cisplatin is allowed) 3. Must have measureable disease per RECIST v1.1. 4. Male or female participants with age = 18 years 5. ECOG performance status 0 or 1. 6. Sexually active fertile subjects and their partners must agree to use medically accepted methods of contraception (e.g., barrier methods, including male condom, female condom, or diaphragm with spermicidal gel) during the course of the study and for 6 months after the last dose of study treatment 7. Adequate Bone marrow function: 1. Absolute neutrophil count (ANC) = 750 /mm3 or =0.5 x 109/L 2. Platelets =50,000/mm3 or =100 x 109/L 3. Hemoglobin =7.5 g/dL (may have been transfused) 8. Adequate renal function, defined as estimated creatinine clearance = 45 mL/min (calculated using the Cockcroft-Gault formula or measured with 24-hour urine collection) 9. Adequate liver function: 1. Total serum bilirubin < 1.5 X ULN (Pts with Gilbert's can enroll if conjugated bilirubin is within normal limits) 2. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) = 2.5 X institutional ULN 10. Ability to understand and willingness to sign a written informed consent and HIPAA consent document Exclusion Criteria: 1. Prior systemic chemotherapy or radiation therapy for advanced or metastatic urothelial carcinoma. 2. Prior immunotherapy with IL-2, IFN-a, or an anti-PD-1, anti-PD-L1, anti-PD-L2, anti-CD137, or CTLA-4 antibody (including ipilimumab), or any other antibody or drug specifically targeting T-cell co-stimulation or immune checkpoint pathways. 3. Major surgery = 4 weeks or major radiation therapy = 2 weeks prior to enrollment. 4. Prior palliative radiotherapy to metastatic lesion(s) is permitted, provided it has not been completed within 48 hours prior to patient enrollment. 5. Participants with known symptomatic central nervous system (CNS) metastases requiring steroids. Participants with previously diagnosed CNS metastases are eligible if they have completed their treatment and have recovered from the acute effects of radiation therapy or surgery prior to randomization, have discontinued corticosteroid treatment for these metastases for at least 4 weeks, and are neurologically stable 6. Persisting toxicity related to prior therapy NCI CTCAE v5.0 Grade >1; however, sensory neuropathy Grade = 2 is acceptable. 7. On active treatment for any other malignancy, except for adjuvant hormone therapy for localized breast cancer or castration for hormone sensitive prostate cancer. 8. Participation in other studies involving investigational drug(s) within 4 weeks prior to randomization. Observational studies are permitted. 9. History of uncontrolled autoimmune disease including but not limited to myasthenia gravis, myositis, autoimmune hepatitis, systemic lupus erythematosus, rheumatoid arthritis, inflammatory bowel disease, vascular thrombosis associated with antiphospholipid syndrome, Wegener's granulomatosis, Sjögren's syndrome, Guillain-Barré syndrome, multiple sclerosis, vasculitis, or glomerulonephritis. Patients with well-controlled autoimmune disease and mild symptoms on a stable dose of prednisone (= 10 mg daily) are allowed on study. 10. Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection (defined by current oral or intravenous antibiotic therapy), symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements. 11. Patients with prior allogeneic hematologic transplant 12. Pregnant or breast-feeding.

Study Design


Intervention

Drug:
Pembrolizumab (200mg)
200mg Pembrolizumab every six weeks via IV infusion.
Pembrolizumab (400mg)
400mg Pembrolizumab every six weeks via IV infusion.
Diagnostic Test:
Monitoring
active surveillance and monitoring via continued serial ctDNA testing and radiographic assessments at regular intervals.

Locations

Country Name City State
n/a

Sponsors (1)

Lead Sponsor Collaborator
Fox Chase Cancer Center

Outcome

Type Measure Description Time frame Safety issue
Primary Proportion of patients who are progression-free by RECIST 1.1 and alive at six months from initiation of active surveillance. 6 months
Secondary Overall survival from initial assignment to active surveillance or maintenance arms defined as time to death (or last known alive) Up to participant death
Secondary Progression-free survival, from initial assignment to maintenance arm defined by RECIST 1.1 or death from any cause. 2 years
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