Cabozantinib in Combination With Enfortumab Vedotin for Locally Advanced or Metastatic Urothelial Cancer

A Phase I/Ib Open Label, Single-Arm Study of Cabozantinib in Combination With Enfortumab Vedotin (EV) in the Treatment of Locally Advanced or Metastatic Urothelial Cancer

This phase I/Ib trial seeks to find out the best dose, possible benefits and/or side effects of cabozantinib in combination with enfortumab vedotin in treating urothelial cancer that has spread to nearby tissues and lymph nodes (locally advanced) or other parts of the body (metastatic). Cabozantinib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Enfortumab vedotin is a monoclonal antibody, enfortumab, linked to a toxic agent called vedotin. Enfortumab attaches to nectin-4 tumor cells in a targeted way and delivers vedotin to kill them. Cabozantinib in combination with enfortumab vedotin may be safe and effective in treating locally advanced or metastatic urothelial cancer.

Study Overview

• Status: Recruiting
• Conditions: Metastatic Urothelial Carcinoma; Locally Advanced Urothelial Carcinoma; Unresectable Urothelial Carcinoma; Infiltrating Bladder Urothelial Carcinoma With Squamous Differentiation
• Intervention / Treatment: Other: Quality-of-Life Assessment; Other: Questionnaire Administration; Drug: Cabozantinib S-malate; Drug: Enfortumab Vedotin

Detailed Description

PRIMARY OBJECTIVES:

I. To determine the recommended phase II dose (RP2D) of cabozantinib s-malate (cabozantinib) and enfortumab vedotin 1.25 mg/kg on days 1, 8 and 15 of a 28-day cycle based on safety and tolerability. (Phase I dose escalation) II. To evaluate the ongoing safety and tolerability of cabozantinib and enfortumab vedotin in a dose expansion cohort. (Phase Ib dose expansion)

SECONDARY OBJECTIVES:

I. Obtain preliminary evidence of anti-tumor activity of the combination of cabozantinib and enfortumab vedotin by assessing the objective response rate (ORR) using Response Evaluation Criteria in Solid Tumors (RECIST) version (v)1.1.

II. Progression-free survival (PFS). III. Overall survival (OS). IV. Disease control rate by RECIST v1.1.

EXPLORATORY OBJECTIVES:

I. To assess the pharmacokinetic (PK) profile of cabozantinib during treatment with enfortumab vedotin.

II. To evaluate the effect of the combination on selected biomarkers in the tumor microenvironment, systemic circulation and gut microbiome and their relationship with efficacy of the combination.

III. To evaluate quality of life, frailty and sarcopenia before, during and at the time of treatment completion.

OUTLINE: This is dose-escalation study of cabozantinib.

Patients receive cabozantinib orally (PO) once daily (QD) on days 1-28 and enfortumab vedotin intravenously (IV) on days 1, 8, and 15. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed up at 30 days and then every 12 weeks.

• Study Type: Interventional
• Enrollment (Estimated): 32
• Phase: Phase 1

Contacts and Locations

• Study Contact: Name: Mehmet Bilen, MD; Phone Number: 404-778-3448; Email: mbilen@emory.edu

Study Locations

• United States
  • Georgia
    • Atlanta, Georgia, United States, 30322
      • Recruiting
      • Emory University Hospital/Winship Cancer Institute
      • Contact: Wilena A. Session; Phone Number: 404-778-3448; Email: wsessio@emory.edu
      • Principal Investigator: Mehmet A. Bilen, MD

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Histologically-documented urothelial carcinoma (squamous differentiation or mixed cell types allowed if urothelial carcinoma is present)
• Metastatic disease or unresectable locally-advanced disease
• Must have received prior treatment with a checkpoint inhibitor (CPI). A CPI is defined as a programmed cell death protein 1 (PD-1) or programmed death-ligand 1 (PD-L1) inhibitor alone or with any other combination
• Must either have prior treatment with platinum-containing chemotherapy or be ineligible at time of enrollment
• Recovery to baseline or =< grade 1 Common Terminology Criteria for Adverse Events (CTCAE) v5.0 from toxicities related to any prior treatments, unless AE(s) are clinically nonsignificant and/or stable on supportive therapy
• Tumor tissue samples must be available for submission prior to initiation of study treatment or patient must be willing to undergo repeat tumor biopsy
• Must have measurable disease according to Response Evaluation Criteria in Solid Tumors (RECIST) (Version 1.1)
• An Eastern Cooperative Oncology Group (ECOG) performance status score of =< 2
• Must be >= 18 years of age
• Absolute neutrophil count (ANC) >= 1500/uL without granulocyte colony-stimulating factor support (within 28 days before first dose of study treatment)
• White blood cell count >= 2500/uL (within 28 days before first dose of study treatment)
• Platelets >= 100,000/uL without transfusion (within 28 days before first dose of study treatment)
• Hemoglobin >= 9 g/dL (within 28 days before first dose of study treatment)
• Alanine aminotransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphatase (ALP) =< 3 x upper limit of normal (ULN). ALP =< 5 x ULN with documented bone metastases (within 28 days before first dose of study treatment)
• Total bilirubin =< 1.5 x ULN (for subjects with Gilbert's disease =< 3 x ULN) (within 28 days before first dose of study treatment)
• Prothrombin (PT)/international normalized ratio (INR) or partial thromboplastin time (PTT) test < 1.3 x the laboratory ULN unless participant is receiving anticoagulant therapy as long as PT or activated partial thromboplastin time (aPTT) is within therapeutic range of intended use of anticoagulants (within 28 days before first dose of study treatment)
• Calculated creatinine clearance >= 30 mL/min (>= 0.5 mL/sec) using the Cockcroft-Gault equation (within 28 days before first dose of study treatment)
• Urine protein/creatinine ratio (UPCR) =< 1 mg/mg (=< 113.2 mg/mmol), or 24-hour (h) urine protein =< 1 g (within 28 days before first dose of study treatment)
• Capable of understanding and complying with the protocol requirements and must have signed the informed consent document
• 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 4 months after the last dose of study treatment
• Female subjects of childbearing potential must not be pregnant at screening. Female subjects are considered to be of childbearing potential unless one of the following criteria are met: documented permanent sterilization (hysterectomy, bilateral salpingectomy, or bilateral oophorectomy) or documented postmenopausal status (defined as 12 months of amenorrhea in a woman > 45 years-of-age in the absence of other biological or physiological causes. In addition, females < 55 years-of-age must have a serum follicle stimulating (FSH) level > 40 mIU/mL to confirm menopause). Note: Documentation may include review of medical records, medical examinations, or medical history interview by study site

Exclusion Criteria:

• Prior treatment with cabozantinib
• Prior enrollment in an enfortumab vedotin study or prior treatment with other monomethyl auristatin E (MMAE)-based antibody-drug conjugates (ADCs)
• Receipt of any type of small molecule kinase inhibitor (including investigational kinase inhibitor) within 2 weeks before first dose of study treatment
• Receipt of any type of cytotoxic, biologic or other systemic anticancer therapy (including investigational) within 2 weeks before first dose of study treatment
• Radiation therapy within 2 weeks before first dose of study treatment. Systemic treatment with radionuclides within 6 weeks before first dose of study treatment
• Known brain metastases or cranial epidural disease unless adequately treated with radiotherapy and/or surgery (including radiosurgery) and stable for at least 4 weeks prior to first dose of study treatment after radiotherapy or at least 4 weeks prior to first dose of study treatment after major surgery (e.g., removal or biopsy of brain metastasis). Subjects must have complete wound healing from major surgery or minor surgery before first dose of study treatment. Eligible subjects must be neurologically asymptomatic and without corticosteroid treatment at the time of first dose of study treatment

• Concomitant anticoagulation with coumarin agents (e.g., warfarin), direct thrombin inhibitors (e.g., dabigatran), direct factor Xa inhibitor betrixaban, or platelet inhibitors (e.g., clopidogrel). Allowed anticoagulants are the following:

  • Prophylactic use of low-dose aspirin for cardio-protection (per local applicable guidelines) and low-dose low molecular weight heparins (LMWH).
  • Therapeutic doses of LMWH or anticoagulation with direct factor Xa inhibitors rivaroxaban, edoxaban, or apixaban in subjects without known brain metastases who are on a stable dose of the anticoagulant for at least 1 week before first dose of study treatment without clinically significant hemorrhagic complications from the anticoagulation regimen or the tumor

• The subject has uncontrolled, significant intercurrent or recent illness including, but not limited to, the following conditions:

  • Cardiovascular disorders:

    • Congestive heart failure New York Heart Association Class 3 or 4, unstable angina pectoris, serious cardiac arrhythmias.
    • Uncontrolled hypertension defined as sustained blood pressure (BP) > 140 mm Hg systolic or > 90 mm Hg diastolic despite optimal antihypertensive treatment.

    • Stroke (including transient ischemic attack [TIA]), myocardial infarction (MI), or other ischemic event, or thromboembolic event (e.g., deep venous thrombosis, pulmonary embolism) within 6 months before first dose of study treatment

      • Subjects with a diagnosis of incidental, subsegmental pulmonary embolism (PE) or deep venous thrombosis (DVT) within 6 months are allowed if stable, asymptomatic, and treated with a stable dose of permitted anticoagulation for at least 1 week before first dose of study treatment

  • Gastrointestinal (GI) disorders including those associated with a high risk of perforation or fistula formation:

    • The subject has evidence of tumor invading the GI tract, active peptic ulcer disease, inflammatory bowel disease (e.g., Crohn's disease), diverticulitis, cholecystitis, symptomatic cholangitis or appendicitis, acute pancreatitis, acute obstruction of the pancreatic duct or common bile duct, or gastric outlet obstruction.
    • Abdominal fistula, GI perforation, bowel obstruction, or intra-abdominal abscess within 6 months before first dose of study treatment.
    • Note: Complete healing of an intra-abdominal abscess must be confirmed before first dose of study treatment
• Clinically significant hematuria, hematemesis, or hemoptysis of > 0.5 teaspoon (2.5 ml) of red blood, or other history of significant bleeding (e.g., pulmonary hemorrhage) within 12 weeks before first dose of study treatment
• Cavitating pulmonary lesion(s) or known endotracheal or endobronchial disease manifestation
• Lesions invading or encasing any major blood vessels
• Ongoing sensory or motor neuropathy grade >= 2

• Other clinically significant disorders that would preclude safe study participation.

  • Serious non-healing wound/ulcer/bone fracture.
  • Uncompensated/symptomatic hypothyroidism.
  • Moderate to severe hepatic impairment (Child-Pugh B or C).
  • Uncontrolled diabetes mellitus defined as a hemoglobin A1C >= 8%
• Major surgery (e.g., laparoscopic nephrectomy, GI surgery, removal or biopsy of brain metastasis) within 2 weeks before first dose of study treatment. Minor surgeries within 10 days before first dose of study treatment. Subjects must have complete wound healing from major surgery or minor surgery before first dose of study treatment. Subjects with clinically relevant ongoing complications from prior surgery are not eligible
• Corrected QT interval calculated by the Fridericia formula (QTcF) > 500 ms per electrocardiogram (ECG) within 14 days before first dose of study treatment. Note: If a single ECG shows a QTcF with an absolute value > 500 ms, two additional ECGs at intervals of approximately 3 min must be performed within 30 min after the initial ECG, and the average of these three consecutive results for QTcF will be used to determine eligibility
• Pregnant or lactating females
• Inability to swallow tablets
• Previously identified allergy or hypersensitivity to components of the study treatment formulations
• Any other active malignancy at time of first dose of study treatment or diagnosis of another malignancy within 3 years prior to first dose of study treatment that requires active treatment, except for locally curable cancers that have been apparently cured, such as basal or squamous cell skin cancer, superficial bladder cancer, or prostate, cervix, or breast

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Treatment (cabozantinib, enfortumab vedotin); Patients receive cabozantinib PO QD on days 1-28 and enfortumab vedotin IV on days 1, 8, and 15. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

Other: Quality-of-Life Assessment; Ancillary studies; Other Names: Quality of Life Assessment; Other: Questionnaire Administration; Ancillary studies; Drug: Cabozantinib S-malate; Given PO; Other Names: BMS-907351; Cabometyx; Cometriq; XL-184; XL184; Drug: Enfortumab Vedotin; Given IV; Other Names: ASG-22CE; Padcev; AGS 22ME; AGS-22M6E; Anti-Nectin 4 ADC ASG-22CE; Anti-nectin-4 Monoclonal Antibody-Drug Conjugate AGS-22M6E; Enfortumab Vedotin-ejfv

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Incidence of adverse events	Will be assessed by the Common Terminology Criteria for Adverse Events version 5.0.	Up to study completion (estimated 5 years)

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Objective response rate	Based on cross-sectional imaging. Categorized according to Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 criteria. ORR will be summarized with the 2-sided 95% confidence interval (CI) using the Clopper-Pearson method in the full analysis set (FAS).	Through study completion, an average of 1 year
Progression-free survival	Kaplan-Meier methods will be used to estimate median survival time or time-specific survival rate with 95% confidence interval.	From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 100 months.
Overall survival	Kaplan-Meier methods will be used to estimate median survival time or time-specific survival rate with 95% confidence interval.	From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 100 months.
Disease control rate (DCR)	Defined as the percentage of patients who achieve complete response, partial response and stable disease as per RECIST v1.1. DCR will be summarized with the 2-sided 95% CI using the Clopper-Pearson method in the FAS.	Up to study completion (estimated 5 years)

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Maximum Plasma Concentration [Cmax]	Pharmacokinetic of cabozantinib during treatment with enfortumab vedotin will be analyzed	Up to study completion (estimated 5 years)
Biomarker analysis	Tumor tissue from pre-enrollment biopsy and correlative peripheral blood samples collected at baseline, on days 1, 8 and 15 during cycle 1 and day 1 of cycle 2 will be assessed for molecular biomarkers not limited to Nectin-4, MET and PDL1. Stool samples will be collected at baseline, during Cycle 3 and at the Off-Treatment Visit to assess for changes in intestinal flora over the course of treatment.	Up to study completion (estimated 5 years)
Quality of life assessment	Functional Assessment of Cancer Therapy - Bladder Cancer questionnaire will be filled out at baseline and every 8 weeks (+/- 7 days) during year 1 of treatment	Through study completion, an average of 1 year
Frailty assessment	Fried Frailty assessment will be obtained at baseline and every 8 weeks (+/- 7 days) during year 1 of treatment.	Through study completion, an average of 1 year
Sarcopenia assessment	SliceOmatic v5.0 by TomoVision will be used to measure change in muscle/adipose tissue on imaging studies obtained.	Through study completion, an average of 1 year

Collaborators and Investigators

• Sponsor: Emory University
• Collaborators: National Cancer Institute (NCI); Exelixis
• Investigators: Principal Investigator: Mehmet A Bilen, MD, Emory University Hospital/Winship Cancer Institute

Study record dates

Study Major Dates

• Study Start (Actual): July 23, 2021
• Primary Completion (Estimated): November 13, 2027
• Study Completion (Estimated): December 21, 2028

Study Registration Dates

• First Submitted: April 30, 2021
• First Submitted That Met QC Criteria: May 6, 2021
• First Posted (Actual): May 7, 2021

Study Record Updates

• Last Update Posted (Actual): April 29, 2026
• Last Update Submitted That Met QC Criteria: April 23, 2026
• Last Verified: April 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms; Neoplasms by Histologic Type; Neoplasms, Glandular and Epithelial; Carcinoma; Carcinoma, Transitional Cell; Immunologic Factors; Physiological Effects of Drugs; enfortumab vedotin; cabozantinib
• Other Study ID Numbers: STUDY00002329 (Other Identifier: Emory University); P30CA138292 (U.S. NIH Grant/Contract); NCI-2021-01365 (Registry Identifier: CTRP (Clinical Trial Reporting Program)); WINSHIP5259-21 (Other Identifier: Emory University Hospital/Winship Cancer Institute)

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No