Stroke and Systemic Embolism Prevention in Adult Participants With Atrial Fibrillation for Whom Oral Anticoagulation is Unsuitable

Официальное название

A Master Protocol for a Phase 3, Randomized, Multicenter, Double-blind Study to Assess Stroke and Systemic Embolism Prevention With REGN7508 and REGN9933, Monoclonal Antibodies Against Factor XI, Versus Placebo in Participants With Atrial Fibrillation for Whom Oral Anticoagulation is Unsuitable (ROXI-INCLINE)

Обзор

This study is researching 2 different experimental drugs called REGN7508 and REGN9933 (called "study drugs"). The study is focused on people who have atrial fibrillation, which means that the heart beats too fast and unevenly. When this happens, blood cannot move smoothly through the heart; it can slow down or pool in one spot, which can lead to the formation of blood clots. REGN7508 and REGN9933 are designed to help stop blood clots forming in patients with atrial fibrillation. The aim of the study is to see how effective and safe REGN7508 and REGN9933, individually, are in preventing ischemic stroke or systemic embolism in people with atrial fibrillation who cannot or may choose to not take blood thinners. The study is looking at several other research questions, including: * What side effects may happen from taking REGN7508 or REGN9933 * How well does REGN7508 or REGN9933 lower the risk of having an ischemic stroke and/or systemic embolism compared to the placebo * How well does REGN7508 or REGN9933 lower the risk of having a major health problem affecting heart and blood circulation compared to placebo * How well does REGN7508 or REGN9933 lower the risk of death compared to placebo * How much REGN7508 or REGN9933 is in the blood at different times * Whether the body makes antibodies against REGN7508 or REGN9933 (which could make the study drugs less effective or could lead to side effects)

Вмешательства

• Препарат REGN7508
  Administered per the protocol
• Препарат REGN9933
  Administered per the protocol
• Препарат Placebo
  Administered per the protocol

Первичные конечные точки

• Time to first occurrence of ischemic stroke or systemic embolism [Срок оценки: Up to 36 months]
• Time to first occurrence of International Society on Thrombosis and Haemostasis (ISTH) major bleeding [Срок оценки: Up to 36 months]

Вторичные конечные точки (12)

• Time to first occurrence of Major Adverse Cardiovascular Event (MACE) [Срок оценки: Up to 36 months]
• Time to first occurrence of MACE, pulmonary embolism, or Venous Thromboembolism (VTE) [Срок оценки: Up to 36 months]
• Time to first occurrence of ischemic stroke [Срок оценки: Up to 36 months]
• Time to Cardiovascular (CV) death [Срок оценки: Up to 36 months]
• Time to all-cause death [Срок оценки: Up to 36 months]
• Occurrence of Treatment-Emergent Adverse Events (TEAEs) [Срок оценки: Up to 39 months]
• Severity of TEAEs [Срок оценки: Up to 39 months]
• Concentrations of REGN7508 over time [Срок оценки: Up to 36 months]
• Concentrations of REGN9933 over time [Срок оценки: Up to 36 months]
• Change from baseline in activated Partial Thromboplastin Time (aPTT) over time [Срок оценки: Up to approximately 9 weeks]
• Change from baseline in Prothrombin time (PT)/International Normalized Ratio (INR) over time [Срок оценки: Up to approximately 9 weeks]
• Occurrence of Anti-Drug Antibody (ADA) to REGN7508 over time [Срок оценки: Up to 36 months]

Критерии участия

Критерии включения

• Has AF or flutter (paroxysmal or persistent), not considered to be secondary to a reversible cause
• At moderate to high risk for stroke defined as:

• CHA2DS2-VA \[C: Congestive heart failure; H: Hypertension; A2: Age ≥75 years (double points); D: Diabetes mellitus; S2: Stroke or TIA or Systemic embolism (double points); V: Vascular disease; A: Age 65-74 years\] score ≥4 OR
• CHA2DS2-VA score of 3 AND at least 1 enrichment criteria as described in the protocol
• Shared decision making between the participant and provider determining that the bleeding risk of Oral Anticoagulant (OAC) therapy outweighs the benefits, making the participant unsuitable for OAC therapy as described in the protocol

Критерии исключения

• Has a mechanical heart valve prosthesis (Note: transcatheter aortic valve replacement is not an exclusion)
• Had an ischemic stroke within 2 days prior to randomization
• Has persistent, uncontrolled hypertension (per investigator's discretion)
• Has a history of Central Nervous System (CNS) bleeding within 30 days prior to randomization
• Has a life expectancy less than 12 months
• Has participated in a prior Factor XI (FXI) inhibitor study

Note: Other protocol-defined Inclusion/ Exclusion criteria apply

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Нет

Дизайн исследования

Распределение

Рандомизированное

Модель

Параллельные группы

Маскирование

Четверное слепое

Основная цель

Профилактика

Центры проведения

США · 18 центров

• SEC Clinical Research — Dothan
• Mission Cardiovascular Research Institute — Fremont
• National Institute of California Heart and Vein Specialists — Huntington Beach
• Profound Research LLC at Southern California Heart Specialists — Pasadena
• Cardiology Associates Medical Group — Ventura
• Interventional Cardiology Medical Group — West Hills
• South Florida Research Organization LLC — Medley
• Sec Clinical Research — Pensacola
• … и ещё 10 центров

Идентификаторы

NCT: NCT07430956 · R9933-CVA-2495 · 2025-521618-25-00

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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