Phase Ib / Regorafenib With Conventional Chemotherapy/Newly Diagnosed Patients/ Multimetastatic Ewing Sarcoma

NCT ID: NCT05830084

Last Updated: 2026-01-06

Basic Information

• Recruitment Status: ACTIVE_NOT_RECRUITING
• Clinical Phase: PHASE1
• Total Enrollment: 23 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2023-06-16
• Study Completion Date: 2027-10-31

Brief Summary

New drug efficacy in ES has been disappointing in the last decades and no new drugs have been successfully introduced up to now in front line treatment. Among the tested drugs, early clinical data suggest that strategies using multi-targeted tyrosine kinase inhibitors (TKI) with anti-angiogenic activities are among the most efficient and may be beneficial in the treatment of patients with ES.

Several TKI have been and are currently being tested as single-agent in patients with relapsed/refractory ES with encouraging results in phase II trials. Regorafenib has shown promising activity in Ewing sarcoma relapse setting, Nevertheless, regorafenib has never been combined with the intensive chemotherapy VDC/IE schedule and therefore this combination needs to be evaluated in order to avoid dose reduction of the current standard treatment and hence its efficacy.

The current clinical trial has been therefore designed to test the feasibility of regorafenib with ES conventional chemotherapy. It consists of a phase Ib that will only recruit patients with multi-metastatic (other than lungs/pleura only) ES, that present the highest unmet medical need (2 year EFS: 33%, similar to patients with relapse/refractory ES).

Detailed Description

All included patients will receive standard Ewing sarcoma (ES) treatment concomitant with regorafenib.

Standard ES treatment consists of: induction chemotherapy (VDC/IE) and local treatment (surgery/radiotherapy), followed by consolidation chemotherapy (VC/IE)/ Bu-Mel (according to physician and patient choice).

Regorafenib will be administered during induction chemotherapy (VDC/IE) and during consolidation chemotherapy with conventional chemotherapy (VC/IE) but not Bu-Mel therapy

Conventional chemotherapy will be administered at the recommended dose (100%) and only regorafenib will be escalated/de-escalated, starting at DL0:

• DL1: 82 mg/m^2 once daily for 21 days/28 days (max 160mg) (100% of the RP2D)
• DL0 (starting dose): 66 mg/m^2 once daily for 21 days/28 days (max 120mg) (80% of the RP2D)
• DL-1: 50 mg/m^2 once daily for 21 days/28 days (max 80mg) (60% of the RP2D) Regorafenib will be stopped 2 weeks before planned surgery of the primary tumor and reintroduced when adequate wound healing is obtained, concomitant with consolidation VC/IE chemotherapy.

Regorafenib will only be given concomitant to radiotherapy in case the primary tumor is located in the extremities. In case of primary tumors located in the pelvis, abdomen, thorax, spine, brain, head or neck, regorafenib will be stopped at least 1 week before start of radiotherapy.

Conditions

Ewing Sarcoma

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Induction chemotherapy (VDC/IE) and local treatment /consolidation chemotherapy

Standard ES treatment consists of: induction chemotherapy (VDC/IE) and local treatment (surgery/radiotherapy), followed by consolidation chemotherapy (VC/IE)/ Bu-Mel (according to physician and patient choice).

Regorafenib will be administered during induction chemotherapy (VDC/IE) and during consolidation chemotherapy with conventional chemotherapy (VC/IE) but not Bu-Mel therapy Conventional chemotherapy will be administered at the recommended dose (100%) and only regorafenib will be escalated/de-escalated.

Regorafenib will only be given concomitant to radiotherapy in case the primary tumor is located in the extremities. In case of primary tumors located in the pelvis, abdomen, thorax, spine, brain, head or neck, regorafenib will be stopped at least 1 week before start of radiotherapy.

Group Type: EXPERIMENTAL

regorafenib tablet

Intervention Type: DRUG

Regorafenib will be escalated/de-escalated, starting at DL0:

• DL1: 82 mg/m^2 once daily for 21 days/28 days (max 160mg) (100% of the RP2D)
• DL0 (starting dose): 66 mg/m^2 once daily for 21 days/28 days (max 120mg) (80% of the RP2D)
• DL-1: 50 mg/m^2 once daily for 21 days/28 days (max 80mg) (60% of the RP2D)

Interventions

regorafenib tablet

Regorafenib will be escalated/de-escalated, starting at DL0:

• DL1: 82 mg/m^2 once daily for 21 days/28 days (max 160mg) (100% of the RP2D)
• DL0 (starting dose): 66 mg/m^2 once daily for 21 days/28 days (max 120mg) (80% of the RP2D)
• DL-1: 50 mg/m^2 once daily for 21 days/28 days (max 80mg) (60% of the RP2D)

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

1. Any histologically and genetically confirmed Ewing sarcoma of bone or soft tissue, or round cell sarcomas which are 'Ewing's-like' but negative for EWSR1 gene rearrangement

2. Metastatic disease

3. Age ≥2 years and <50 years (from second birthday to 49 years 364 days)

4. Patient assessed as medically fit to receive the Ewing sarcoma standard multimodal treatment and regorafenib, including:

• Absolute Neutrophil Count (ANC) ≥ 0.75x10^9/L, platelets ≥ 75x10^9/L.
• Alanine aminotransferase (ALT), and aspartate aminotransferase (AST) ≤ 5×ULN
• Bilirubin ≤ 2×ULN
• Creatinine < 2x ULN or creatinine clearance >60 ml/min/1.73 m^2
• International normalized ratio (INR)/ Partial thromboplastin time (PTT). INR and PTT ≤ 1.5 x ULN. INR & PTT ≤ 1.5xULN

5. Adequate cardiac function as evidenced by left ventricular ejection fraction (LVEF) ≥50%) at baseline, as determined by echocardiography

6. Adequately controlled blood pressure (BP) with or without antihypertensive medications, defined as: a BP <95th percentile for sex, age, and height at screening (as per National Heart Lung and Blood Institute [NHLBI] guidelines) and no change in antihypertensive medications within 1 week prior to Cycle 1 Day 1. Patients >18 years old should have BP ≤ 150/90 mmHg.

7. No prior treatment for Ewing sarcoma other than surgery

8. Negative pregnancy test for female patients of childbearing potential within 7 days prior to study registration.

9. Patient agrees to use highly effective contraception during therapy and for 12 months after last trial treatment (females) or 6 months after last trial treatment (males), where applicable

10. Subject must be able to swallow and retain oral medication.

11. Written informed consent from the patient and/or the parent/legal guardian, according to local, regional or national regulation prior to any study specific procedures.

12. Patients must be affiliated to a social security system or beneficiary of the same, as per local regulatory requirements (France only)

Exclusion Criteria

1. Localized tumor or metastatic disease to lung/pleura only.

2. Contra-indication to the Ewing sarcoma standard multimodal treatment

3. Pregnant or breastfeeding women or intending to become pregnant during the study.

4. Follow-up not possible due to social, geographic or psychological reasons

5. Impairment of gastrointestinal (GI) function or GI disease that may significantly alter absorption of oral drugs

6. A clinically significant ECG abnormality, including a marked prolonged QTcF interval (eg, a repeated demonstration of a QTcF interval >480 msec) Clinically significant, uncontrolled heart disease (including history of any cardiac arrhythmias, e.g., ventricular, supraventricular, nodal arrhythmias, or conduction abnormality, unstable angina, active coronary artery disease and myocardial infarction within 6 months before randomization.) Uncontrolled hypertension (systolic pressure >150 mmHg or diastolic pressure > 90 mmHg on repeated measurement) despite optimal medical management

7. Previous arterial or venous thromboembolisms Grade ≥ 3 per CTCAE v5.0

8. Hypersensitivity to any active substance or to any excipients

9. Radiographic evidence of encasement or invasion of a major blood vessel or of intratumoral cavitation

10. Major surgical procedure or significant traumatic injury within 28 days before starting study treatment

11. Non-healing wound, ulcer or bone fracture.

12. Uncontrolled systemic or local infection requiring systemic treatment

13. Any anticoagulant therapy (risk of hemorrhage with Regorafenib)

14. Interstitial lung disease with ongoing signs and symptoms.

15. Known prior history of HBV, HCV, HIV

16. Any other medical or other condition that, in the opinion of the investigator(s), would preclude the subject's participation in this clinical study

• Minimum Eligible Age: 2 Years
• Maximum Eligible Age: 50 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Bayer

INDUSTRY

Sponsor Role: collaborator

Gustave Roussy, Cancer Campus, Grand Paris

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Pablo Berlanga, MD

Role: PRINCIPAL_INVESTIGATOR

Gustave Roussy, Cancer Campus, Grand Paris

Locations

Queensland Children's Hospital

Brisbane, , Australia

Monash Children's Hospital

Clayton, , Australia

Royal Children's Hospital

Parkville, , Australia

Perth Children's Hospital

Perth, , Australia

Rigshospitalet

Copenhagen, , Denmark

CHU Bordeaux

Bordeaux, , France

Centre Oscar Lambret

Lille, , France

centre Léon Bérard

Lyon, , France

Institut Curie

Paris, , France

Gustave Roussy

Villejuif, Île-de-France Region, France

Istituto Nazionale dei Tumori

Milan, , Italy

Princess Máxima Center

Utrecht, , Netherlands

Vall d'Hebron University Hospital

Barcelona, , Spain

Countries

Australia; Denmark; France; Italy; Netherlands; Spain

Other Identifiers

2023-503322-39-00

Identifier Type: CTIS

Identifier Source: secondary_id

2022/3545

Identifier Type: OTHER

Identifier Source: secondary_id

2022-002874-10

Identifier Type: -

Identifier Source: org_study_id