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NCT07493304RecruitingPhase 3

Treatment and Secondary Prevention of Venous Thromboembolism (VTE) in Adult Participants With Solid and Hematologic Cancers

A 2-Part, Phase 3, Multicenter, Randomized, Open-Label, Active-Controlled Study to Assess Efficacy and Safety of REGN7508, a Monoclonal Antibody Against Factor XI, for the Treatment and Secondary Prevention of Venous Thromboembolism in Participants With Solid and Hematologic Cancers (ROXI-CAT-II)

Source: ClinicalTrials.gov · Last updated 21 Oct 2026

Brief summary (registry, in English)

This study is researching an experimental drug called REGN7508 (called "study drug") and will consist of 2 parts: Part 1 and Part 2. The study is focused on participants with or without cancer who develop blood clots in certain veins (called Deep Vein Thrombosis \[DVT\]) that block blood flow (Part 1) or focused on participants with cancer who develop blood clots in certain veins (DVT) or the lungs (also called Pulmonary Embolism \[PE\]) (Part 2). The aim of the study is to see how safe and effective the study drug is at treating and preventing further blood clots in participants with or without cancer (Part 1) or in participants with cancer (Part 2) compared with another treatment (apixaban). The study is looking at several other research questions, including: * What side effects may happen from taking the study drug * How much study drug is in the blood at different times * Whether the body makes antibodies against the study drug (which could make the drug less effective or could lead to side effects)

Status (registry)
Recruiting
Phase (registry)
Phase 3
Study type
Interventional
Enrollment
1600 (estimated)
First submitted
5 Mar 2026
Start date
26 Aug 2026
Primary completion date
18 Jul 2031
Lead sponsor
Regeneron Pharmaceuticals
NCT number
NCT07493304
EU CT number
2024-519299-16-00

What you commit to

  • Study type: Interventional · Phase 3
  • Planned participants: 1600
  • From 26 Aug 2026 to the primary completion date, 18 Jul 2031
  • 13 sites in 5 countries
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Other illness

  • Is at high risk of intracranial bleeding in the opinion of the investigator
  • Known bleeding conditions (eg, Hemophilia A or B, von Willebrand's disease), hemorrhagic tumor sites, or other conditions with a high risk for bleeding (eg, hepatic disease associated with coagulopathy)
  • Part 1 participants with cancer and Part 2 additional exclusion criteria:
    • Has acute leukemia or myelodysplastic syndrome
    • Has primary brain tumor
    • Has brain metastases as described in the protocol

Other

  • Contraindication to anticoagulation in the opinion of the investigator
  • Life expectancy of \< 6 months
  • Part 1 additional exclusion criteria:
    • Has a symptomatic PE
    • Has an asymptomatic (incidentally-diagnosed) PE in a segmental or larger pulmonary artery
  • Part 2 additional exclusion criteria: PE leading to hemodynamic instability as described in the protocol
    • Note: Other Protocol Defined Inclusion/ Exclusion Criteria Apply

Who the study is looking for

  • Has an Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 to 2 at the time of screening and day 1 prior to first dose of study intervention
  • In Part 1 participants with cancer and Part 2 participants: Histologically confirmed diagnosis of malignant solid or select hematologic tumor (other than basal-cell or squamous-cell carcinoma of the skin alone) as described in the protocol
  • Part 1 additional criteria:
    • Has newly diagnosed symptomatic lower extremity DVT or incidentally-detected proximal lower extremity DVT (eg, popliteal or femoral) within 5 days (120 hours) of randomization (with imaging confirmation)
    • Anticoagulation therapy with a therapeutic dose of a Direct Oral Anticoagulant (DOAC) for at least 3 months is indicated for the newly diagnosed proximal lower extremity DVT
  • Part 2 additional criteria:
    • Newly diagnosed VTE within 5 days (120 hours) of randomization (with imaging confirmation) as described in the protocol
    • Anticoagulation therapy with a therapeutic dose of a DOAC for at least 6 months is indicated for newly diagnosed VTE

Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (13)

Sites in registry order. Save your city in your profile to sort them by distance.

SiteCityCountrySite status
Arensia Exploratory Medicine, Multiprofile Hospital for Active Treatment Sveta Sofia
Coordinator of this site? Confirm its status
SofiaBulgariaRecruiting
Tokai University Hospital
Coordinator of this site? Confirm its status
Isehara-ShiJapanRecruiting
Yamaguchi University Hospital
Coordinator of this site? Confirm its status
UbeJapanRecruiting
Inje University Haeundae Paik Hospital
Coordinator of this site? Confirm its status
BusanSouth KoreaRecruiting
Seoul National University Hospital
Coordinator of this site? Confirm its status
SeoulSouth KoreaRecruiting
Yonsei University Health System, Severance Hospital
Coordinator of this site? Confirm its status
SeoulSouth KoreaRecruiting
Samsung Medical Center
Coordinator of this site? Confirm its status
SeoulSouth KoreaRecruiting
Yonsei University Health System, Yongin Severance Hospital
Coordinator of this site? Confirm its status
Yongin-siSouth KoreaRecruiting
Institute of Oncology Bucharest
Coordinator of this site? Confirm its status
BucharestRomaniaRecruiting
Arensia Exploratory Medicine, The Oncology Institute "Prof. Dr. Ion Chiricuta"
Coordinator of this site? Confirm its status
Cluj-NapocaRomaniaRecruiting
El Paso Medical Research Institute (Medresearch Inc)
Coordinator of this site? Confirm its status
El PasoUnited StatesWithdrawn
Bioresearch Partner- Hialeah Hospital
Coordinator of this site? Confirm its status
HialeahUnited StatesWithdrawn
Memorial Sloan-Kettering Cancer Center
Coordinator of this site? Confirm its status
New YorkUnited StatesRecruiting

This page is information, not medical advice. Discuss any trial with your doctor.