Cabozantinib With Ifosfamide in Relapsed/Refractory Sarcomas

Recruiting now · Phase 1

Conditions studied: Ewing Sarcoma, Osteosarcoma, Sarcomas

In brief

The purpose of this study is to better understand how safe and effective the drug cabozantinib in combination with high-dose ifosfamide is in the treatment of children and adults with relapsed/refractory sarcomas.

Key facts

Study ID

NCT06156410

Run by

Children's Hospital of Philadelphia

People needed

30

Starts

2023-10-24

Expected to finish

2028-11-01

Last updated by the study team

2025-11-14

Who can join

Age: 5 and older, up to 40. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Histologic diagnosis of any sarcoma, including bone and soft tissue sarcomas. Biopsy from current relapse/progression is highly preferred, though will accept tissue from prior relapse/progression or initial diagnosis with approval from the study Principal Investigator or designee.
• Disease that has progressed on or relapsed after upfront initial therapy, which must have included traditional chemotherapy.
• Evaluable or Measurable disease, according to Response Evaluation Criteria in Solid Tumors (RECIST v1.1), within 21 days of enrollment.
• Age, within the following parameters by cohort:
• Phase I dose-finding cohort: age 12 to 40 years at the time of enrollment.
• Phase I dose-confirmation cohort: age 5 to < 12 years at the time of enrollment.
• Body surface area (BSA): > 0.35 m2.
• Performance status: Lansky play (< 16 years of age) or Karnofsky (> 16 years of age) of ≥ 50, corresponding to Eastern Cooperative Oncology Group (ECOG) categories < 2.
• Prior toxicity: recovery to baseline or grade < 1, as per the Common Terminology Criteria for Adverse Events (CTCAE) version 5.0 (v5.0), from all acute toxicities, unless adverse events (AE) are clinically non-significant (i.e. alopecia) or controlled on supportive care (i.e. nausea/vomiting, hypothyroidism).
• Able to swallow tablets whole.
• Hematopoietic function:
• Absolute neutrophil count > 1,000/uL (without hematopoietic growth factor within the time frame noted below).
• Hemoglobin > 8 g/dL (without transfusion in the last 7 days).
• Platelets > 100,000/uL (without transfusion in the last 7 days).
• Renal function:
• Normal renal function determined by one of the following means (even if others are outside of normal range): 1) serum creatinine < 1.5 x upper limit of normal (ULN) for age; 2) cystatin C within normal limits; 3) nuclear medicine glomerular filtration rate (GFR) within normal limits, or 4) calculated creatinine clearance of > 70 mL/min/1.73 m2 (≥ 1.17mL/sec)
• Urine protein/creatinine ratio (UPCR) ≤ 1 mg/mg (≤ 113.2 mg/mmol), or 24-hour urine protein ≤ 1 g.
• Hepatic function:
• Total bilirubin < 1.5 x ULN (for subjects with Gilbert's disease < 3.0 x ULN).
• Alanine aminotransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphatase (ALP) ≤ 3 x ULN (ALP ≤ 5 x ULN is allowed with documented bone metastases). For the purpose of this study, the ULN for ALT is defined as 45 IU/L.
• Serum albumin > 2.8 g/dL.
• Prothrombin time (PT) and partial thromboplastin time (PTT) < 1.3 x ULN.
• Sexually active fertile subjects and their partners must agree to use medically accepted methods of contraception (i.e. 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:
• Pre-pubertal by tanner staging, defined as Tanner stage 1 or 2.

You may not qualify if…

• Radiographic evidence of tumor invading major blood vessels, or endotracheal or endobronchial tumor.
• Radiographic evidence of tumor invading the gastrointestinal tract, including esophagus, stomach, small or large bowel, rectum, or anus.
• Known brain metastases or cranial epidural disease unless adequately treated with radiotherapy or surgery (including radiosurgery) and stable for at least 4 weeks prior to enrollment after radiotherapy or major surgery (i.e. removal or biopsy of brain metastasis). Eligible subjects must be neurologically asymptomatic and without corticosteroid treatment at the time of enrollment.
• Prior progression/relapse with cabozantinib. Prior therapy with cabozantinib without progression/relapse and prior use of other multi-tyrosine kinase inhibitors is allowed.
• Prior therapy with high-dose ifosfamide (> 10 g/m2/cycle) at any point.
• Any small molecule inhibitor therapy within 5 half-lives of the drug or 14 days, whichever is shorter, before enrollment.
• Myelosuppressive chemotherapy within 14 days before enrollment.
• Autologous bone marrow transplant (auto-BMT) within 42 days before enrollment.
• Immunotherapy, including chimeric antigen receptor T-cells (CAR-T), within 21 days before enrollment.
• Small port radiation therapy within 14 days before enrollment. Substantial bone marrow radiation (i.e. > 50% of the pelvis) or craniospinal radiation within 4 weeks before enrollment. Subjects with any clinically relevant ongoing complications from prior radiation therapy should not be treated with cabozantinib until these complications have resolved.
• Major surgery (i.e. abdominal surgery; excluding intracranial surgery as noted above) within 14 days before enrollment. Minor surgeries (including mediport or tunneled catheter placement; excluding needle biopsy for tumor sampling or peripherally inserted central catheter placement) within 10 days before enrollment. Subjects must have documented complete wound healing from major surgery or minor surgery before enrollment.
• Hematopoietic growth factors within 7 days (for short-acting growth factor) or 14 days (for long-acting growth factor) before enrollment.
• Previously identified allergy or hypersensitivity to components of the study treatment formulations. See Table 10 in Section 9.1.4 for components of cabozantinib.
• History of clinically significant hemorrhagic cystitis, defined as grade > 3 non-infectious cystitis, associated with antineoplastic agents.
• Any medications that are strong CYP3A4 inducers or inhibitors or medications definitely known to cause QTc prolongation.
• Concomitant anticoagulation with coumarin agents (i.e. warfarin), direct thrombin inhibitors (i.e. dabigatran), certain direct factor Xa inhibitors (betrixaban), or platelet inhibitors (i.e. 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 and certain direct factor Xa inhibitors (rivaroxaban, edoxaban, apixaban) in subjects without known brain metastases who are on a stable dose of the anticoagulant for at least 1 week before enrollment without clinically significant hemorrhagic complications from the anticoagulation regimen or the tumor.
• Cardiovascular disease, including:
• Class III or IV congestive heart failure (New York Heart Association grading).
• Congenital prolonged QT syndrome, clinically significant cardiac arrhythmia, or prolonged corrected QT (QTc) within 14 days before enrollment.
• Uncontrolled hypertension, defined as sustained blood pressure > 95th percentile for age, height, and gender for pediatric subjects and > 140/90 mmHg for adult subjects, despite optimal antihypertensive treatment.
• Stroke, transient ischemic attack (TIA), myocardial infarction (MI), unstable angina pectoris, or other ischemic or thromboembolic event (excluding those associated with a central line) within 6 months before enrollment.
• Gastrointestinal disease, including:
• Active peptic ulcer disease, inflammatory bowel disease (Crohn's disease, ulcerative colitis), diverticulitis, cholecystitis, symptomatic cholangitis, appendicitis, or acute pancreatitis.

Where it is running

• University of California San Francisco — San Francisco, California, United States (enrolling)
• Children's Hospital Colorado — Aurora, Colorado, United States (enrolling)
• Children's Hospital of Philadelphia — Philadelphia, Pennsylvania, United States (enrolling)
• University of Pennsylvania — Philadelphia, Pennsylvania, United States (enrolling)

Full record on ClinicalTrials.gov

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