Losartan + Sunitinib in Treatment of Osteosarcoma

A Phase I/Ib Study of Losartan in Combination With Sunitinib in the Treatment of Pediatric and Adult Patients With Relapsed or Refractory Osteosarcoma

This study is a Phase 1/1b clinical trial that aims to determine the Maximally Tolerated Dose of Losartan and Sunitinib Combination Therapy. Patients will first be accrued to the Dose Escalation phase of the study, using a 3+3 design. Medication dosages will increase until a maximally tolerated dose is found. Patients will then be accrued to the Dose Expansion phase of the trial, where efficacy of pre-determined dose will be preliminarily assessed.

Study Overview

• Status: Recruiting
• Conditions: Osteosarcoma
• Intervention / Treatment: Drug: Sunitinib; Drug: Losartan

• Study Type: Interventional
• Enrollment (Estimated): 41
• Phase: Phase 1

Contacts and Locations

• Study Contact: Name: Kelly Faulk, MD, MSCS; Phone Number: 720-777-6503; Email: kelly.faulk@childrenscolorado.org

Study Locations

• United States
  • California
    • Los Angeles, California, United States, 90027
      • Recruiting
      • Children's Hospital Los Angeles
      • Contact: Fariba Navid, MD; Phone Number: 323-361-4624; Email: fnavid@chla.usc.edu
  • Colorado
    • Aurora, Colorado, United States, 80045
      • Recruiting
      • University of Colorado Hospital
      • Contact: Kelly Faulk, MD, MSCS; Phone Number: 1-720-777-6503; Email: kelly.faulk@childrenscolorado.org
    • Aurora, Colorado, United States, 80045
      • Recruiting
      • Children's Hospital Colorado
      • Principal Investigator: Kelly Faulk, MD
      • Contact: Kelly Faulk, MD; Email: kelly.faulk@childrenscolorado.org
  • Georgia
    • Atlanta, Georgia, United States, 30322
      • Recruiting
      • Children's Hospital of Atlanta
      • Principal Investigator: Thomas Cash, MD
      • Contact: Thomas Cash, MD; Email: AflacDevTreferral@choa.org

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 10 years to 40 years (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• 1. Provision to sign and date the consent form (if individual is a minor, provision of a parent or legal guardian to sign and date the consent form and provision of individual to provide assent for study).

  2. Stated willingness to comply with all study procedures and be available for the duration of the study.

  3. Male or female aged ≥ 10 years old. 4. Histologically confirmed osteosarcoma (at either original diagnosis or relapse) that has either recurred or progressed after at least one prior systemic therapy and for which no curative therapy exists.

• Patients with surface or periosteal osteosarcoma are not eligible.

• Patients with active CNS metastasis are not eligible. Previously treated CNS metastases which occurred 3 months or more prior, without evidence of active recurrence, are acceptable.

  5. Disease status

• Dose Escalation (Part A): Patients must have measurable or evaluable disease.

• Cohort Expansion (Part B): Patients with measurable or evaluable disease and those with completely resected disease are eligible.

  6. Performance status:

• Performance status ECOG performance status (>18 years old) ≤ 2 or Karnofsky performance score (<18 years old) > 50 7. Prior Therapy:

• Patients must have fully recovered from the acute toxic effects of all prior anti-cancer therapy and must meet the following minimum duration from prior anti-cancer directed therapy prior to enrollment. If after the required timeframe, the numerical eligibility criteria are met (e.g., blood count criteria) the patient is considered to have recovered adequately.

  1. Cytotoxic chemotherapy or other anti-cancer agents known to be myelosuppressive. At least 21 days after the last dose of cytotoxic or myelosuppressive chemotherapy (42 days if prior nitrosourea).
  2. Anti-cancer agents not known to be myelosuppressive (e.g., not associated with reduced platelet or ANC counts): ≥ 7 days after the last dose of agent.

  i. Antibodies: ≥ 21 days must have elapsed from infusion of last dose of antibody, and toxicity related to prior antibody therapy must be recovered to Grade ≤ 1.

ii. Corticosteroids: ≥ 14 days must have elapsed since last dose of corticosteroid.

iii. Hematopoietic growth factors: ≥ 14 days after the last dose of a long- acting growth factor (e.g., pegfilgrastim) or 7 days for short-acting growth factor.

iv. Interleukins, Interferons and Cytokines (other than hematopoietic growth factors): ≥ 21 days after the completion of interleukins, interferon or cytokines (other than Hematopoietic Growth Factors).

v. Stem cell Infusions: Autologous stem cell infusion, including boost infusion: ≥ 42 days.

vi. Cellular Therapy: ≥ 42 days after the completion of any type of cellular therapy (e.g., modified T cells, NK cells, dendritic cells, etc.) vii. XRT/External Beam Irradiation including protons: ≥ 14 days after local XRT; ≥ 150 days after TBI, craniospinal XRT or if radiation to ≥ 50% of the pelvis; ≥ 42 days if other substantial bone marrow radiation.

• NOTE: Patients with history of cardiac irradiation with mean cardiac dose > 15 Gy are not eligible (see exclusion criteria).

  8. Adequate bone marrow function, defined as:

• Peripheral absolute neutrophil count (ANC) ≥ 750/mm3
• Platelet count ≥ 75,000/mm3 (transfusion independent, defined as not receiving platelet transfusions for at least 7 days prior to enrollment).
• Hemoglobin ≥ 8 g/dL (with or without transfusion) 9. Adequate renal function, defined as:

• Creatinine clearance or radioisotope GFR > 70 mL/min/1.73 m2 OR a serum creatinine based on age/gender.

  10. Adequate hepatic function, defined as:

• Total bilirubin ≤ 1.5 x upper limit of normal (ULN) for age
• SGPT (ALT) ≤ 135 U/L. For the purpose of this study, the ULN for SGPT is 45 U/L.

• Serum albumin ≥ 2.8 g/dL 11. Patients with ≥ trace protein on urinalysis at screening will be allowed to enroll in the study at investigator discretion. A baseline urine protein creatinine ratio (UPC) should be obtained for patients with ≥ trace protein on urinalysis for consideration regarding Section 6.3.7 dose modification requirements.

  12. Adequate cardiac function, defined as:

• Current cardiac ejection fraction > 50% by biplane Simpson method on echocardiogram

• QTc ≤ 480 ms 13. Patients with preexisting hyper- or hypothyroidism must be on a stable dose of medication.

  14. Ability to take and retain oral medications. NOTE: Medication can be administered via nasogastric or gastrostomy tube.

Exclusion Criteria:

1. Patients who underwent major surgery within 14 days prior to start of treatment are not eligible.

   NOTE: Core biopsy or central line placement are considered minor and are allowed within any time limitations.

2. Patients with uncontrolled coagulopathy or bleeding disorder, or any active bleeding (i.e., gastrointestinal or pulmonary) deemed to be clinically significant by investigator are not eligible.
3. Patients with history of pulmonary embolism or significant thromboembolic event with the preceding 28 days. Patients with thromboembolic events > 28 days before enrollment who are stable on or completed an anticoagulation course are eligible.
4. Patients with history of cardiac irradiation with mean cardiac dose > 15 Gy are not eligible.
5. Patients with symptomatic cardiac disease (i.e. New York Heart Association or Modified Ross Heart Failure Classification for Children > class 2) are not eligible.
6. Patients with any history of cardiac dysfunction including prior abnormal echocardiogram (ejection fraction < 50%), severe or unstable angina, peripheral vascular disease, congenital prolonged QTc syndrome, clinically significant cardiac arrhythmias, stroke, or myocardial infarction are not eligible.

7. Pregnancy

   • Pregnant or breast-feeding women will not be entered on this study because there is not yet available information regarding human fetal or teratogenic toxicities. Pregnancy tests must be obtained in females who are post-menarchal.
   • Males or females of reproductive potential may not participate unless they have agreed to practice 1 highly effective and 1 additional effective (barrier) method of contraception at the same time during the entire study treatment period and through 3 months after the last dose of study drug, or agree to practice true abstinence, when this is in line with the preferred and usual lifestyle of the subject. Patients who themselves or their partners have undergone female or male sterilization do not require 2 methods of contraception. Highly effective methods are defined as those with <1% failure rate with perfect use and include: oral contraceptive pills (combined or progesterone only), intrauterine devices (IUD), hormonal implant or injection, contraceptive patch, and vaginal ring.

8. Concomitant medications:

   • Anti-hypertensives: Patients who cannot be controlled to goal blood pressure for gender/age are not eligible.
   • Corticosteroids: Patients receiving systemic corticosteroids are not eligible. > 14 days must have elapsed since last systemic corticosteroid. Note: patients using topical or inhaled corticosteroids are eligible.
   • Investigational Drugs: Patients currently receiving another investigational drug are not eligible.
   • Anti-cancer agents: Patients currently receiving other anti-cancer agents are not eligible.
   • Drug interactions: Patients who require treatment with medications that are strong inhibitors or inducers of CYP3A4 or inhibitors of CYP2A9 or have received these medications in the 7 days prior to enrollment, are not eligible. Patients who require treatment with enzyme inducing anticonvulsants are not eligible.
   • Medications that prolong QTc: Patients who require treatment with medications known to prolong QTc are not eligible

Study Plan

How is the study designed?

Design Details

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

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Dose Escalation and Expansion; Participants receive losartan in combination with sunitinib in 42-day treatment cycles. During Part A, participants are enrolled using a standard 3+3 dose-escalation design across up to four dose levels. Dose Levels 1 and 2 utilized once-daily losartan dosing and are closed to enrollment. Active enrollment occurs at Dose Levels 3 and 4, where losartan is administered twice daily and sunitinib is administered daily for 4 weeks followed by a 2-week rest period. Following determination of the maximally tolerated dose (MTD), 12 additional participants are enrolled into an expansion cohort to further evaluate safety, pharmacokinetics, pharmacodynamics, and preliminary antitumor activity.

Drug: Sunitinib; Sunitinib will be administered orally daily on days 1-28 (4 weeks), followed by 14-day rest period (2 weeks). Dosing will be performed based on body surface area (BSA) in mg/m2. Sunitinib is given as capsules or liquid formulation. Doses should be taken at approximately the same time daily.; Other Names: Sunitinib Malate; Drug: Losartan; Losartan will be administered orally daily on days 1-42 (6 weeks) of each 42-day cycle according to assigned dose level. Dosing will be performed based on weight in kilograms and rounded to the nearest 12.5 mg (half of 25 mg tablet). Dose Levels 1 and 2 are closed to enrollment. Dose level 1 does not exceed 50mg daily. Dose level 2 does not exceed 100mg daily. Dose levels 3 and 4 do not exceed 150mg total daily. Doses should be taken at approximately the same time daily and patients should fast for at least 4 hours prior to and 1 hour after the morning dose. No fasting is required for evening dose.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Assessment of Dose-Limiting Toxicities of Losartan and Sunitinib Combination	Assessment of Dose-Limiting Toxicities (DLTs) according to the Common Terminology Criteria for Adverse Events (CTCAE) version 5 to assess the safety of the combination	Beginning of study to end of study, up to 4 years
Maximally Tolerated Dose of Losartan and Sunitinib	The MTD will be defined as the dose level below that at which 1/3 or 2/6 patients experience DLTs.	Beginning of study to end of study, up to 4 years
Recommended Phase 2 Dose of Losartan and Sunitinib	The dose than less that 33% of patients experience DLTs.	Beginning of study to end of study, up to 4 years

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Pharmacokinetics of Losartan and Sunitinib in Pediatric and Adult Patients: Maximum Peak Concentration	Determined through blood samples	Days 1, 15, and 29 of Cycle 1 (Cycle length is 42 days)
Pharmacokinetics of Losartan and Sunitinib in Pediatric and Adult Patients: Time to Peak Concentration	Determined through blood samples	Days 1, 15, and 29 of Cycle 1 (Cycle length is 42 days)
Pharmacodynamics of Losartan and Sunitinib in Pediatric and Adult Patients: CCL2-Mediated Chemotactic Index	Determined through a monocyte mitigation assay and reported as a change in chemotactic index from baseline	Beginning of study to end of treatment, up to 2 years (up to 17 cycles and cycle length is 42 days)
Pharmacodynamics of Losartan and Sunitinib in Pediatric and Adult Patients: Plasma CCL2 Levels	Assessed by Enzyme Linked Immunosorbent Assay (ELISA).	Beginning of study to end of treatment, up to 2 years (up to 17 cycles and cycle length is 42 days)
Pharmacodynamics of Losartan and Sunitinib in Pediatric and Adult Patients: CCR2+ Monocyte Population	Assessed by Flow Cytometry	Beginning of study to end of treatment, up to 2 years (up to 17 cycles and cycle length is 42 days)
Preliminary Antitumor Activity of Losartan and Sunitinib in Pediatric and Adult Patients: Disease Control Rate (DCR)	Stable disease determined according to RECIST 1.1 criteria	Beginning of study, end of cycle 1 (each cycle is 6 weeks), and at the end of odd cycles (up to 17 cycles)
Preliminary Antitumor Activity of Losartan and Sunitinib in Pediatric and Adult Patients: Disease Control Rate (DCR)	Partial response determined according to RECIST 1.1 criteria	Beginning of study, end of cycle 1 (each cycle is 6 weeks), and at the end of odd cycles (up to 17 cycles)
Preliminary Antitumor Activity of Losartan and Sunitinib in Pediatric and Adult Patients: Disease Control Rate (DCR)	Complete response determined according to RECIST 1.1 criteria	Beginning of study, end of cycle 1 (each cycle is 6 weeks), and at the end of odd cycles (up to 17 cycles)
Preliminary: Progression Free Survival (PFS)	Determined according to irRECIST criteria.	Beginning of study, end of cycle 1 (each cycle is 6 weeks), and at the end of odd cycles (up to 17 cycles)

Collaborators and Investigators

• Sponsor: University of Colorado, Denver
• Collaborators: Cancer League of Colorado; Colorado State University; Swim Across America
• Investigators: Principal Investigator: Kelly Faulk, MD, Children's Hospital Colorado

Study record dates

Study Major Dates

• Study Start (Actual): August 26, 2019
• Primary Completion (Estimated): August 1, 2027
• Study Completion (Estimated): August 1, 2029

Study Registration Dates

• First Submitted: March 12, 2019
• First Submitted That Met QC Criteria: April 1, 2019
• First Posted (Actual): April 3, 2019

Study Record Updates

• Last Update Posted (Actual): September 1, 2026
• Last Update Submitted That Met QC Criteria: August 28, 2026
• Last Verified: August 1, 2026

More Information

Terms related to this study

• Keywords: Adults; Phase 1; Pediatrics; Maximum Tolerated Dose; Losartan; Sunitinib; Recommended Phase 2 Dose
• Additional Relevant MeSH Terms: Neoplasms; Neoplasms by Histologic Type; Sarcoma; Neoplasms, Connective and Soft Tissue; Neoplasms, Bone Tissue; Neoplasms, Connective Tissue; Osteosarcoma; Organic Chemicals; Heterocyclic Compounds, 1-Ring; Heterocyclic Compounds; Heterocyclic Compounds, 2-Ring; Heterocyclic Compounds, Fused-Ring; Azoles; Hydrocarbons; Hydrocarbons, Cyclic; Hydrocarbons, Aromatic; Imidazoles; Indoles; Benzene Derivatives; Pyrroles; Tetrazoles; Biphenyl Compounds; Sunitinib; Losartan
• Other Study ID Numbers: 18-2740.cc; NCI-2019-06119 (Other Identifier: CTRP)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

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