A Study Comparing the Efficacy of L19TNF+Doxorubicin vs Doxorubicin Alone as First-line Therapy in Patients With Advanced or Metastatic Soft Tissue Sarcoma (FIBROSARC)

A Phase III Study Comparing the Efficacy of the Combination of Doxorubicin and the Tumor-targeting Human Antibody-cytokine Fusion Protein L19TNF to Doxorubicin Alone as First-line Therapy in Patients With Advanced or Metastatic Soft Tissue Sarcoma

The present study is an open-label, randomized, controlled, two-arm multi-center study of the efficacy of L19TNF treatment in combination with doxorubicin versus doxorubicin alone in advanced or metastatic soft-tissue sarcoma patients.

In the study, 102 patients will be randomized in a 1:1 ratio to receive doxorubicin treatment (Arm 1) or L19TNF treatment in combination with doxorubicin (Arm 2).

The primary objective of the trial is to evaluate if L19TNF in combination with doxorubicin (Arm 2) given for unresectable or metastatic soft tissue sarcoma improves efficacy measured as progression free survival, as compared to doxorubicin alone (Arm 1).

Study Overview

• Status: Recruiting
• Conditions: Soft Tissue Sarcoma
• Intervention / Treatment: Drug: Doxorubicin; Drug: Onfekafusp alfa

Detailed Description

Phase III, open label, randomized, controlled study in subjects with advanced or metastatic soft tissue sarcoma. In the study, 102 patients will be enrolled and parallel assigned in a 1:1 fashion to one of two different arms, as follows:

• ARM 1: Patients will receive 75 mg/m2 doxorubicin once every 3 weeks (reference treatment).
• ARM 2: Patients will receive 13 µg/kg L19TNF on days 1, 3 and 5 every 3 weeks in combination with 60 mg/m2 doxorubicin (once every 3 weeks).

Anti-cancer activity will be assessed every 6 weeks during therapy and every 12 weeks thereafter. Median PFS, PFS rates at 3, 6, 9, 12 and 18 months, mOS, OS rate at 12 and 18 months and ORR will be calculated.

Safety assessment will be performed on an ongoing basis during study participation, including standard laboratory assessments. The incidence of AEs will be summarized by severity in all patients with at least one study drug intake.

• Study Type: Interventional
• Enrollment (Estimated): 102
• Phase: Phase 3

Contacts and Locations

• Study Contact: Name: Teresa Hemmerle, PhD; Phone Number: +39 0577 17816; Email: regulatory@philogen.com
• Study Contact Backup: Name: Marco Taras, Biologist; Email: regulatory@philogen.com

Study Locations

• France
  • Bordeaux, France
    • Recruiting
    • Institut Bergonie
    • Contact: Antoine Italiano
  • Dijon, France
    • Recruiting
    • Centre Georges Francois Leclerc
    • Contact: Alice Hervieu
  • Lyon, France
    • Recruiting
    • Centre Leon Berard
    • Contact: Jean-Yves Blay
  • Nice, France
    • Recruiting
    • Centre Antoine Lacassagne
    • Contact: Agnès Ducolombier
  • Toulouse, France
    • Not yet recruiting
    • Institut Claudius Regaud
    • Contact: Thibaud Valentin
  • Villejuif, France
    • Not yet recruiting
    • Institut Gustave Roussy
    • Contact: Axel Le Cesne
• Germany
  • Bad Saarow, Germany, 15526
    • Recruiting
    • Helios Klinikum Bad Saarow
    • Contact: Daniel Pink, Dr
  • Berlin, Germany
    • Recruiting
    • Charité- Universitätsmedizin Berlin
    • Contact: Anne Floercken, PD Dr. med.
  • Düsseldorf, Germany
    • Not yet recruiting
    • Universitätsklinikum Düsseldorf
    • Contact: Judith Strapatsas, PD Dr. med.
  • Frankfurt, Germany, 60590
    • Recruiting
    • Universitätsklinikum Frankfurt
    • Contact: Marit Ahrens, MD
  • Hamburg, Germany
    • Recruiting
    • Universitätsklinik Hamburg-Eppendorf
    • Contact: Jana Kaethe Striefler, PD Dr. med.
  • Heidelberg, Germany, D-69120
    • Recruiting
    • Heidelberg University Hospital
    • Contact: Gerlinde Egerer, MD
  • Köln, Germany, 50937
    • Recruiting
    • Uniklinik Köln
    • Contact: Roland Ulrich
  • Mainz, Germany
    • Recruiting
    • Universitätsmedizin der J.-G. Universität Mainz
    • Contact: Marius Fried, PD Dr.
  • München,, Germany
    • Recruiting
    • Klinik rechts der Isar
    • Contact: Judith Hecker, PD Dr. med
  • Münster, Germany, 48149
    • Recruiting
    • Universitaetsklinikum Muenster
    • Contact: Christoph Schliemann, Prof. MD
• Italy
  • Bologna, Italy
    • Recruiting
    • Bologna University, Chemotherapy Unit, IRCCS Istituto Ortopedico Rizzoli, Department of DIMES
    • Contact: Emanuela Palmerini, MD
  • Orbassano, Italy, 10043
    • Not yet recruiting
    • AOU San Luigi Gonzaga
    • Contact: Lorenzo D'Ambrosio, Dr.
  • Roma, Italy, 00168
    • Not yet recruiting
    • Fondazione Policlinico Universitario Agostino Gemelli IRCCS
    • Contact: Michela Quirino, Dr.
  • Torino
    • Candiolo, Torino, Italy
      • Recruiting
      • IRCCS Fondazione del Piemonte per l'Oncologia Istituto per la Ricerca e la Cura del Cancro di Candiolo
      • Contact: Sandra Aliberti, Dr.
• Poland
  • Gdynia, Poland
    • Not yet recruiting
    • Szpital Pomorski Im. PCK
    • Contact: Joanna Pikiel
  • Warsaw, Poland, 02-781
    • Recruiting
    • Centrum Onkologii-Instytut im. Marii Skłodowskiej-Curie Warszawa
    • Contact: Piotr Rutkowski, MD
• Spain
  • Barcelona, Spain
    • Recruiting
    • Hospital Universitari Vall d'Hebron
    • Contact: Claudia Valverde Morales, Dr.
  • Granada, Spain
    • Recruiting
    • Hospital Universitario Virgen de Las Nieves
    • Contact: Lucía Castillo Portellano
  • Madrid, Spain
    • Recruiting
    • Hospital General Universitario Gregorio Marañon
    • Contact: Rosa María Álvarez, Dr.
  • Madrid, Spain, 28003
    • Recruiting
    • Fundacion jimenez diaz
    • Contact: Javier M Broto, MD
  • Zaragoza, Spain
    • Recruiting
    • Hospital Miguel Servet
    • Contact: Javier Martinez Trufero, Dr.
  • Murcia
    • El Palmar, Murcia, Spain
      • Recruiting
      • Hospital Universitario Virgen de La Arrixaca
      • Contact: Jeronimo Martinez Garcia, Dr.

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 16 years to 73 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Patients aged 18-75 years.
2. Patients must have histological evidence of advanced unresectable and/or metastatic high-grade soft tissue sarcoma (grade 2 - 3 according to the FNCLCC grading system) not amenable to curative treatment with surgery or radiotherapy and for which doxorubicin treatment is considered appropriate. Participants with Osteosarcoma, Chondrosarcoma, Ewing Sarcoma/ Primitive Neuroectodermal Tumor (PNET), Kaposi's Sarcoma, Dermatofibrosarcoma protuberans, and Gastrointestinal Stromal Tumors (GIST) will be excluded
3. Patients must have at least one unidimensionally measurable lesion by computed tomography as defined by RECIST criteria 1.1. This lesion should not have been irradiated during previous treatments.
4. Life expectancy of at least 3 months.
5. Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 2.
6. Documented negative test for HIV-HBV-HCV. For HBV serology: the determination of HBsAg, anti-HBsAg-Ab and anti-HBCAg-Ab is required. In patients with serology documenting previous exposure to HBV (i.e., anti-HBs Ab with no history of vaccination and/or anti-HBc Ab), negative serum HBV-DNA is required. For HCV: HCV-RNA or HCV antibody test. Subjects with a positive test for HCV antibody but no detection of HCV-RNA indicating no current infection are eligible.
7. Female patients: negative serum pregnancy test at screening for women of childbearing potential (WOCBP)*. WOCBP must agree to use, from the screening to six months following the last administration of L19TNF and/or Doxorubicin, highly effective contraception methods, as defined by the "Recommendations for contraception and pregnancy testing in clinical trials" issued by the Head of Medicine Agencies' Clinical Trial Facilitation Group (www.hma.eu/ctfg.html) and which include, for instance, progesterone-only or combined (estrogen- and progesterone-containing) hormonal contraception associated with inhibition of ovulation, intrauterine devices, intrauterine hormone-releasing systems, bilateral tubal occlusion, vasectomized partner or sexual abstinence. Male patients: Male subjects able to father children must agree to use two acceptable methods of contraception from the screening to four months following the last administration of L19TNF and/or Doxorubicin (e.g. condom with spermicidal gel). Double-barrier contraception is required.
8. Informed consent signed and dated to participate in the study.
9. Willingness and ability to comply with the scheduled visits, treatment plan, laboratory tests and other study procedures.

Exclusion Criteria:

1. Prior therapy (except surgery and radiation) for unresectable or metastatic malignant soft tissue sarcoma.
2. Previous treatment with anthracycline-containing chemotherapy.
3. Radiotherapy within 4 weeks prior to therapy.
4. Known history of allergy to TNFα, anthracyclines or other intravenously administered human proteins/peptides/antibodies.
5. Previous therapy with recombinant TNF.
6. Absolute neutrophil count (ANC) < 1.5 x 109/L, platelets < 100 x 109/L and haemoglobin (Hb) < 9.0 g/dl.
7. Chronically impaired renal function or creatinine ≥ 2.0 x ULN.
8. Inadequate liver function (ALT, AST, ALP or total bilirubin ≥ 2.5 x ULN.
9. Any severe concomitant condition which makes it undesirable for the patient to participate in the study or which could jeopardize compliance with the protocol.
10. History within the last year of acute or subacute coronary syndromes including myocardial infarction, unstable or severe stable angina pectoris.
11. Heart insufficiency (> Grade II, New York Heart Association (NYHA) criteria).
12. Clinically significant cardiac arrhythmias or requiring permanent medication.
13. Uncontrolled hypertension, despite optimal therapy.
14. Ischemic peripheral vascular disease (Grade IIb-IV according to Leriche-Fontaine classification).
15. Severe diabetic retinopathy such as severe non-proliferative retinopathy and proliferative retinopathy.
16. Major trauma including major surgery (such as abdominal/cardiac/thoracic surgery) within 4 weeks of administration of study treatment.
17. Pregnancy or breast-feeding.
18. Requirement of chronic administration of corticosteroids or other immunosuppressant drugs. Limited use of corticosteroids to treat or prevent acute hypersensitivity reactions is not considered an exclusion criterion.
19. Presence of active and uncontrolled infections or other severe concurrent disease, which, in the opinion of the investigator, would place the patient at undue risk or interfere with the study.
20. Known active or latent tuberculosis (TB).
21. Concurrent malignancies other than Soft Tissue Sarcoma, unless the patient has been disease-free for at least 2 years.
22. Growth factors or immunomodulatory agents within 7 days prior to the administration of study treatment.
23. Serious, non-healing wound, ulcer or bone fracture.
24. Allergy to study medication or excipients in study medication.
25. Deep vein thrombosis, pulmonary embolism or other acute vascular events within 6 months.
26. Anticoagulation therapy with P2Y12 antagonists (e.g., clopidogrel, ticagrelor) and vitamin K antagonists (e.g., phenprocoumon, warfarin).
27. Concurrent use of other anti-cancer treatments or agents other than study medication.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Arm 1; Patients will receive 75 mg/m2 doxorubicin once every 3 weeks (reference treatment).	Drug: Doxorubicin; Patients will receive a fixed dose doxorubicin, administered as a 15 ± 5 minutes i.v. infusion.
Experimental: Arm 2; Patients will receive 13 µg/kg L19TNF on days 1, 3 and 5 every 3 weeks in combination with 60 mg/m2 doxorubicin (once every 3 weeks).	Drug: Doxorubicin; Patients will receive a fixed dose doxorubicin, administered as a 15 ± 5 minutes i.v. infusion.; Drug: Onfekafusp alfa; Patients will receive a fixed dose of L19TNF in combination with a fixed dose of doxorubicin.; Other Names: L19TNF

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Median Progression free survival (mPFS)	Progression-free survival PFS in a time-to-event analysis in the L19TNF plus Doxorubicin control group (Arm 2) versus the Doxorubicin alone treatment group (Arm 1).	From randomization up to week 72

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
PFS rate	Progression Free Survival	At 3, 6, 9, 12, 18 months after randomization
Overall Response Rate (ORR)	Rate of Complete Response and Partial Response of L19TNF plus Doxorubicin treatment group (Arm 2) versus Doxorubicin alone (Arm 1).	At 3, 6, 9, 12, 18 months after randomization
Overall survival (OS)	OS in the L19TNF plus Doxorubicin treatment group (Arm 2) versus Doxorubicin alone (Arm 1)	At 12 months and 18 months after randomization
Median Overall survival (mOS)	mOS in the L19TNF plus Doxorubicin treatment group (Arm 2) versus Doxorubicin alone (Arm 1).	At 12 months and 18 months after randomization
Adverse Events	Number of patients with adverse events (AEs) assessed on CTCAE v.4.03	From week 1 up to week 72
HAFA assessment	Assessment of the formation of human anti-fusion protein antibodies (HAFA) against L19TNF (Arm 2).	At day 1 of week 1 and week 2; at day 1 from week 4 up to week 18, every 3 weeks; at week 22-23 (EoT); at week 23-24 (first follow-up visit)

Collaborators and Investigators

• Sponsor: Philogen S.p.A.

Study record dates

Study Major Dates

• Study Start (Actual): November 29, 2017
• Primary Completion (Estimated): December 31, 2025
• Study Completion (Estimated): December 31, 2025

Study Registration Dates

• First Submitted: November 25, 2020
• First Submitted That Met QC Criteria: November 25, 2020
• First Posted (Actual): December 3, 2020

Study Record Updates

• Last Update Posted (Actual): April 8, 2024
• Last Update Submitted That Met QC Criteria: April 5, 2024
• Last Verified: April 1, 2024

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms, Connective and Soft Tissue; Neoplasms by Histologic Type; Neoplasms; Sarcoma; Molecular Mechanisms of Pharmacological Action; Enzyme Inhibitors; Antineoplastic Agents; Topoisomerase II Inhibitors; Topoisomerase Inhibitors; Antibiotics, Antineoplastic; Doxorubicin
• Other Study ID Numbers: PH-L19TNFDOX2-03/16

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No