Probucol for Symptomatic Intracranial and Extracranial Artery Stenosis

Phase 3

Recruiting

• Conditions: Ischemic Stroke; TIA
• Interventions: Drug: Placebo probucol; Drug: Probucol

• Registration Number: NCT06225752
• Lead Sponsor: First Affiliated Hospital of Wannan Medical College

Brief Summary

This study is a multicenter, double-blind, placebo-controlled, randomized clinical trial that aims to evaluate the efficacy of probucol on the reduction of the risk of recurrent stroke in patients with symptomatic intracranial or extracranial arterial stenosis.

Detailed Description

This study is a multicenter, double-blind, placebo-controlled, randomized clinical trial that aims to evaluate the efficacy of probucol on the reduction of the risk of recurrent stroke in patients with symptomatic intracranial or extracranial arterial stenosis. During the study period, 5452 patients at intermediate risk for ischemic stroke or TIA will be enrolled from 100 centers.To evaluate whether probucol, as compared with placebo, reduces the risk of recurrent stroke in patients at high risk for ischemic stroke or TIA within 7 days of onset.Patients in one arm will receive probucol initiated with a dose of 1000 mg per day on days 1 through 30, and continuing with 500 mg per day after day 31, and those in the other arm will receive an equivalent placebo drug. Study visits will be performed on the day of randomization, at discharge, at day 90 and at 1 year and then followed up annually until the occurrence of the endpoint event or the end of the study. In addition, patients will be followed up at any time when new clinical symptoms of the neurologic system and suspicious events occur, including worsening of the original ischemic event and the appearance of new transient or persistent neurologic symptoms.

Study Timeline

• Study First Submitted: 2024-01-17
• Study First Submitted QC: 2024-01-17
• Study First Posted: 2024-01-26
• Study Start: 2024-06-15
• Status Verified: 2024-07
• Last Update Submitted: 2024-07-12
• Last Update Posted: 2024-07-15
• Primary Completion: 2026-04-30
• Study Completion: 2026-10-31

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 5452

Inclusion Criteria

1.40 years or older than 40 years; 2.Ischemic stroke or transient ischemic attack (TIA); 3.Within 7 days from onset to randomization; 4.Main intracranial or extracranial arteries supplying the ischemic event region are narrowed by more than 50%; 5.Informed consent signed.

Exclusion Criteria

1. Presumed cardiac source of embolus, such as atrial fibrillation, prosthetic cardiac valve, endocarditis or patent foramen ovale;
2. Stroke/TIA due to arterial dissection, angioplasty, or vascular surgery;
3. Usage of probucol within 30 days before randomization;
4. Known allergy or sensitivity or intolerance to probucol;
5. Myocardial disease within the past 30 days, including myocardial infarction, myocarditis;
6. With ventricular tachycardia, bradycardia, tip-twist ventricular tachycardia；
7. With Q-Tc interval prolongation, or currently using drugs that may cause Q-Tc interval prolongation (male Q-Tc>450ms, female Q-Tc>470ms);
8. Cardiac syncope or unexplained syncope;
9. Impaired hepatic (ALT or AST > twice the upper limit of normal range) or kidney (creatinine exceeding 1.5 times of the upper limit of normal range or eGFR less than 50 ml/min) function at randomization;
10. Anemia (haemoglobin <10g/dL), thrombocytopenia (platelet count <100×109/L) or leucopenia (white blood cell <3×109/L) at randomization;
11. Planned surgery or interventional treatment requiring cessation of the study drug during the study;
12. Participating in another clinical trial with an investigational drug or device concurrently or during the last 30 days;
13. Pregnant or lactating women; Pregnant, currently trying to become pregnant, or of child-bearing potential and not using birth control;
14. Severe non-cardiovascular comorbidity with a life expectancy of less than 1 years;
15. Serious drug or alcohol abuse in the past 1 year；
16. Inability to understand and/or follow research procedures due to mental, cognitive, or emotional disorders, or to be an unsuitable candidate for the study for any other considered by the investigator.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Placebo Probucol Group	Placebo probucol	The study drug should be started as soon as possible within 7 days after symptom onset.
Probucol Group	Probucol	The study drug should be started as soon as possible within 7 days after symptom onset.

Primary Outcome Measures

Name	Time	Method
Recurrent stroke event	within 1 year	Ischemic or hemorrhagic stroke

Secondary Outcome Measures

Name	Time	Method
Recurrent ischemic stroke event	within 1 year	Incidence of any new ischemic stroke
Composite vascular events	within 1 year	Including ischemic stroke, hemorrhagic stroke, myocardial infarction and vascular death
Poor functional outcome	within 1 year	Defined as a modified Rankin Scale (mRS) score ≥3(The mRS Scale is used to evaluate the recovery of neurological function in stroke patients. It consists of a seven-point scale, with Grade 0 indicating no symptoms at all. Grade 1 represents the presence of symptoms but without significant disability, allowing for the performance of regular jobs and activities. Grade 2 signifies mild disability where individuals are unable to perform all work and activities but can manage personal affairs independently. Grade 3 indicates moderate disability requiring assistance from others for walking without aid. Grade 4 denotes severe disability where individuals cannot walk unassisted and are unable to care for their own needs. Grade 5 represents severe disability with bedridden status, incontinence, and necessitating continuous care round-the-clock. Finally, Grade 6 signifies death.)
All-cause mortality	within 1 year	Death from any cause

Trial Locations

Locations (1)

The First Affliated Hospital of Wannan Medical College; 🇨🇳 Wuhu, China