Skip to content

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)

Status
Not yet recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-519299-16-00
Enrollment
48
Registered
2026-06-26
Start date
Unknown
Completion date
Unknown
Last updated
2026-06-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Cancer Associated Thrombosis

Brief summary

Part 1: Occurrence of Treatment-Emergent Adverse Events (TEAEs), Part 1: Severity of TEAEs, Part 2: Time-to-first event of centrally adjudicated recurrent VTE [DVT (symptomatic or asymptomatic [proximal] or Non-fatal PE (symptomatic or asymptomatic [in a segmental or larger pulmonary artery] )or VTE-related death)], Part 2: Time-to-first event of centrally adjudicated International Society of Thrombosis and Hemostasis (ISTH)-defined major bleeding or Clinically Relevant Non-Major (CRNM) bleeding

Detailed description

Part 1: Percent inhibition of Factor XI functional Coagulant activity (FXI:C), Part 1: Fold change from baseline in activated Partial Thromboplastin Time (aPTT), Part 1: Functional REGN7508 concentration, Part 1: Factor XI (FXI) concentration, Part 1 and 2: Occurrence of Anti-Drug Antibody (ADA) to REGN7508, Part 1 and 2: Magnitude of ADA to REGN7508, Part 2: Time-to-first centrally adjudicated event of DVT (symptomatic or asymptomatic [proximal]), Part 2: Time-to-first centrally adjudicated event of Non-fatal PE (symptomatic or asymptomatic [in a segmental or larger pulmonary artery]), Part 2: Time-to-first centrally adjudicated event of VTE-related death, Part 2: Time-to-first event of centrally adjudicated venous thromboembolic events other than DVT and PE, Part 2: Time-to-first event of centrally adjudicated Arterial Thromboembolism (ATE), Part 2: Time-to-first event of centrally adjudicated recurrent VTE and bleeding events [DVT (symptomatic or asymptomatic [proximal] or Non-fatal PE (symptomatic or asymptomatic) or VTE-related death) or bleeding (ISTH-defined major bleeding or CRNM bleeding)], Part 2: Occurrence of TEAEs, Part 2: Severity of TEAEs

Interventions

Sponsors

Regeneron Pharmaceuticals Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Part 1: Occurrence of Treatment-Emergent Adverse Events (TEAEs), Part 1: Severity of TEAEs, Part 2: Time-to-first event of centrally adjudicated recurrent VTE [DVT (symptomatic or asymptomatic [proximal] or Non-fatal PE (symptomatic or asymptomatic [in a segmental or larger pulmonary artery] )or VTE-related death)], Part 2: Time-to-first event of centrally adjudicated International Society of Thrombosis and Hemostasis (ISTH)-defined major bleeding or Clinically Relevant Non-Major (CRNM) bleeding

Secondary

MeasureTime frame
Part 1: Percent inhibition of Factor XI functional Coagulant activity (FXI:C), Part 1: Fold change from baseline in activated Partial Thromboplastin Time (aPTT), Part 1: Functional REGN7508 concentration, Part 1: Factor XI (FXI) concentration, Part 1 and 2: Occurrence of Anti-Drug Antibody (ADA) to REGN7508, Part 1 and 2: Magnitude of ADA to REGN7508, Part 2: Time-to-first centrally adjudicated event of DVT (symptomatic or asymptomatic [proximal]), Part 2: Time-to-first centrally adjudicated event of Non-fatal PE (symptomatic or asymptomatic [in a segmental or larger pulmonary artery]), Part 2: Time-to-first centrally adjudicated event of VTE-related death, Part 2: Time-to-first event of centrally adjudicated venous thromboembolic events other than DVT and PE, Part 2: Time-to-first event of centrally adjudicated Arterial Thromboembolism (ATE), Part 2: Time-to-first event of centrally adjudicated recurrent VTE and bleeding events [DVT (symptomatic or asymptomatic [proximal] or Non-fatal

Outcome results

None listed

Source: EU CTIS · Data processed: Jun 27, 2026