- ICH GCP
- USA klinikai vizsgálatok nyilvántartása
- Klinikai vizsgálat NCT07586540
Alirocumab for Stabilisation of Symptomatic Vulnerable Carotid Plaque (CAROTID-STABIL)
Alirocumab for Stabilisation of Symptomatic Vulnerable Carotid Plaque: A Multicentre, Randomised, Double-Blind, Placebo-Controlled Trial With High-Resolution Vessel-Wall MRI and Clinical Endpoints
A tanulmány áttekintése
Állapot
Körülmények
Beavatkozás / kezelés
Részletes leírás
BACKGROUND: Symptomatic carotid stenosis of 50-69% carries a 30-day recurrent-stroke risk of 5-8% and a 2-year risk of 15-20% on best medical therapy alone. A substantial proportion of patients are either surgically deferred or anatomically borderline where revascularisation benefit is debated. PCSK9 inhibitors have demonstrated carotid plaque regression, reduction in lipid-rich necrotic core, and reduction in arterial inflammation. However, no RCT has tested whether PCSK9 inhibition can reduce intraplaque haemorrhage or LRNC in symptomatic carotid plaque.
DESIGN: This is a phase III, multicentre, randomised, double-blind, placebo-controlled, parallel-group superiority trial with a 26-week primary endpoint assessment and a 52-week extension. Patients with recently symptomatic carotid stenosis (50-69%) with MRI-confirmed vulnerable plaque features (IPH or LRNC) will be randomised 1:1 to alirocumab 150 mg SC q2w or matched placebo, both on background high-intensity statin therapy.
PRIMARY ENDPOINT: Absolute change in IPH volume (mm³) from baseline to week 26, measured on MPRAGE sequences by a blinded central imaging core lab using semi-automated segmentation.
SECONDARY ENDPOINTS: Include percent change in LRNC volume, absolute change in minimum fibrous cap thickness, percent change in total plaque wall volume at weeks 26 and 52, composite of ipsilateral recurrent stroke or TIA through week 52, and proportion avoiding carotid revascularisation through week 52.
SAFETY: Monitored by an independent Data and Safety Monitoring Board (DSMB) with pre-specified interim analyses at 50% and 75% enrolment.
Tanulmány típusa
Beiratkozás (Becsült)
Fázis
- 3. fázis
Kapcsolatok és helyek
Tanulmányi helyek
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Alexandria, Egyiptom
- Alexandria University, Smouha University Comprehensive Stroke Center
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Cairo, Egyiptom
- Cairo University
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Cairo, Egyiptom
- Ain Shams University
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Cairo, Egyiptom
- Neurology Department, Al-Azhar University
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Amman, Jordánia
- Amman Specialized IR Center
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Doha, Katar
- Weill Cornell Medicine-Qatar
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Rabat, Marokkó
- Centre Hospitalier Universitaire Ibn Sina de Rabat
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Karachi, Pakisztán
- Aga Khan University
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Abhā, Szaud-Arábia
- King Khalid University
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Jeddah, Szaud-Arábia
- King Abdulaziz Medical City
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Mecca, Szaud-Arábia
- King Abdullah Medical City
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Tunis, Tunézia
- Institut National de Neurologie
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Eskişehir, Törökország (Türkiye)
- Department of Neurology, Eskisehir Osmangazi University
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Istanbul, Törökország (Türkiye)
- Neurology Department, Dr. Lutfi Kirdar City Hospital
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Részvételi kritériumok
Jogosultsági kritériumok
Tanulmányozható életkorok
- Felnőtt
- Idősebb felnőtt
Egészséges önkénteseket fogad
Leírás
Inclusion Criteria:
- Age ≥ 40 and ≤ 80 years
- Recently symptomatic (TIA, amaurosis fugax, or non-disabling ischaemic stroke with mRS ≤ 2) referable to a carotid territory within 28 days of randomisation
- Ipsilateral extracranial internal carotid artery stenosis of 50-69% by NASCET criteria on CTA or DSA
- HR-VW-MRI evidence of IPH (MPRAGE hyperintensity ≥150% of adjacent sternocleidomastoid) OR LRNC ≥ 10% of plaque volume in the symptomatic plaque
- On a stable dose of high-intensity statin (atorvastatin 40-80 mg or rosuvastatin 20-40 mg) for ≥ 4 weeks, or able and willing to initiate atorvastatin 80 mg daily at randomisation
- LDL-C ≥ 70 mg/dL (1.8 mmol/L) at screening
- Able to undergo 3T MRI (no contraindications)
- Provides written informed consent
Exclusion Criteria:
- Indication for urgent carotid revascularisation within 14 days per treating team
- Disabling stroke (mRS > 2) or NIHSS > 5 at randomisation
- Carotid stenosis ≥ 70% or occlusion
- Cardioembolic stroke source (atrial fibrillation, LV thrombus, endocarditis, PFO with high-risk features)
- Intracranial haemorrhage within 12 months or any history of symptomatic ICH
- eGFR < 30 mL/min/1.73 m²
- Active hepatobiliary disease or ALT/AST > 3x ULN
- Prior exposure to any PCSK9 inhibitor or inclisiran within 6 months
- Known hypersensitivity to alirocumab or excipients
- Pregnancy, breastfeeding, or unwillingness to use contraception in women of childbearing potential
- Life expectancy < 24 months
- Participation in another interventional trial within 30 days
- Inability to comply with follow-up or MRI schedule
Tanulási terv
Hogyan készül a tanulmány?
Tervezési részletek
- Elsődleges cél: Kezelés
- Kiosztás: Véletlenszerűsített
- Beavatkozó modell: Párhuzamos hozzárendelés
- Maszkolás: Hármas
Fegyverek és beavatkozások
Résztvevő csoport / kar |
Beavatkozás / kezelés |
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Kísérleti: Alirocumab + High-Intensity Statin
Alirocumab 150 mg subcutaneous injection every 2 weeks via pre-filled pen, self-administered or caregiver-administered, from randomisation through week 52.
Plus atorvastatin 80 mg daily (or rosuvastatin 40 mg if intolerant) as background therapy.
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Alirocumab 150 mg subcutaneous injection every 2 weeks via pre-filled pen for 52 weeks.
First dose given at randomisation visit under supervision.
Self-administered or caregiver-administered at home for subsequent doses.
Alirocumab is a fully human monoclonal antibody that inhibits PCSK9, leading to significant LDL-C reduction beyond that achieved with statins alone.
Matched placebo subcutaneous injection every 2 weeks via pre-filled pen for 52 weeks.
Visually identical to alirocumab injection.
First dose given at randomisation visit under supervision.
Self-administered or caregiver-administered at home for subsequent doses.
Atorvastatin 80 mg oral tablet once daily as background high-intensity statin therapy for both arms.
Rosuvastatin 40 mg daily may be substituted if patient is intolerant to atorvastatin.
Administered throughout the entire study duration (52 weeks).
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Placebo Comparator: Placebo + High-Intensity Statin
Matched placebo subcutaneous injection every 2 weeks via pre-filled pen from randomisation through week 52, visually identical to alirocumab.
Plus atorvastatin 80 mg daily (or rosuvastatin 40 mg if intolerant) as background therapy.
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Alirocumab 150 mg subcutaneous injection every 2 weeks via pre-filled pen for 52 weeks.
First dose given at randomisation visit under supervision.
Self-administered or caregiver-administered at home for subsequent doses.
Alirocumab is a fully human monoclonal antibody that inhibits PCSK9, leading to significant LDL-C reduction beyond that achieved with statins alone.
Matched placebo subcutaneous injection every 2 weeks via pre-filled pen for 52 weeks.
Visually identical to alirocumab injection.
First dose given at randomisation visit under supervision.
Self-administered or caregiver-administered at home for subsequent doses.
Atorvastatin 80 mg oral tablet once daily as background high-intensity statin therapy for both arms.
Rosuvastatin 40 mg daily may be substituted if patient is intolerant to atorvastatin.
Administered throughout the entire study duration (52 weeks).
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Mit mér a tanulmány?
Elsődleges eredményintézkedések
Eredménymérő |
Intézkedés leírása |
Időkeret |
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Absolute change in intraplaque haemorrhage (IPH) volume from baseline to week 26
Időkeret: Baseline to 26 weeks
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Absolute change in intraplaque haemorrhage volume (mm³) from baseline to week 26, measured on MPRAGE sequences by a blinded central imaging core laboratory using semi-automated segmentation.
IPH is defined as hyperintensity ≥150% of adjacent sternocleidomastoid muscle signal on 3T MRI.
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Baseline to 26 weeks
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Másodlagos eredményintézkedések
Eredménymérő |
Intézkedés leírása |
Időkeret |
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Percent change in lipid-rich necrotic core (LRNC) volume at week 26
Időkeret: Baseline to 26 weeks
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Percent change in lipid-rich necrotic core volume from baseline to week 26, measured on high-resolution vessel-wall MRI by a blinded central imaging core laboratory.
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Baseline to 26 weeks
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Absolute change in minimum fibrous cap thickness at week 26
Időkeret: Baseline to 26 weeks
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Absolute change in minimum fibrous cap thickness (mm) from baseline to week 26, measured on post-contrast T1 black-blood MRI by a blinded central imaging core laboratory.
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Baseline to 26 weeks
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Percent change in total plaque wall volume at week 26
Időkeret: Baseline to 26 weeks
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Percent change in total plaque wall volume (outer wall area minus lumen area summed across all slices) from baseline to week 26, measured on high-resolution vessel-wall MRI by a blinded central imaging core laboratory.
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Baseline to 26 weeks
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Percent change in intraplaque haemorrhage (IPH) volume at week 52
Időkeret: Baseline to 52 weeks
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Percent change in intraplaque haemorrhage volume from baseline to week 52, measured on MPRAGE sequences by a blinded central imaging core laboratory.
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Baseline to 52 weeks
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Percent change in lipid-rich necrotic core (LRNC) volume at week 52
Időkeret: Baseline to 52 weeks
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Percent change in lipid-rich necrotic core volume from baseline to week 52, measured on high-resolution vessel-wall MRI by a blinded central imaging core laboratory.
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Baseline to 52 weeks
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Composite of ipsilateral recurrent ischaemic stroke or TIA through week 52
Időkeret: Randomisation to 52 weeks
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Time to first occurrence of ipsilateral recurrent ischaemic stroke or transient ischaemic attack (TIA) from randomisation through week 52, adjudicated by an independent blinded clinical events committee.
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Randomisation to 52 weeks
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Proportion of patients avoiding carotid revascularisation through week 52
Időkeret: Randomisation to 52 weeks
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Proportion of patients who do not undergo carotid revascularisation (carotid endarterectomy or carotid artery stenting) through 52 weeks from randomisation, adjudicated by an independent blinded clinical events committee.
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Randomisation to 52 weeks
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Egyéb eredményintézkedések
Eredménymérő |
Intézkedés leírása |
Időkeret |
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Safety and tolerability composite
Időkeret: Randomisation to 52 weeks
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Composite safety endpoint including: serious adverse events, adverse events leading to discontinuation, injection-site reactions, new-onset diabetes, neurocognitive adverse events, frequency of LDL-C < 15 mg/dL and clinical correlates, haemorrhagic stroke, and major bleeding (BARC >= 3).
Monitored continuously through 52 weeks.
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Randomisation to 52 weeks
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Együttműködők és nyomozók
Tanulmányi rekorddátumok
Tanulmány főbb dátumok
Tanulmány kezdete (Becsült)
Elsődleges befejezés (Becsült)
A tanulmány befejezése (Becsült)
Tanulmányi regisztráció dátumai
Először benyújtva
Először nyújtották be, amely megfelel a minőségbiztosítási kritériumoknak
Első közzététel (Tényleges)
Tanulmányi rekordok frissítései
Utolsó frissítés közzétéve (Tényleges)
Az utolsó frissítés elküldve, amely megfelel a minőségbiztosítási kritériumoknak
Utolsó ellenőrzés
Több információ
A tanulmányhoz kapcsolódó kifejezések
Kulcsszavak
További vonatkozó MeSH feltételek
- Cerebrovaszkuláris rendellenességek
- Agyi betegségek
- Központi idegrendszeri betegségek
- Idegrendszeri betegségek
- Érrendszeri betegségek
- Szív-és érrendszeri betegségek
- Artériás elzáródásos betegségek
- A nyaki artériák betegségei
- Carotis stenosis
- Heterociklusos vegyületek, 1 gyűrű
- Heterociklusos vegyületek
- Zsírsavak
- Lipidek
- Azolok
- Pirrolok
- Heptánsavak
- Atorvasztatin
- alirocumab
Egyéb vizsgálati azonosító számok
- MENASINO-CAROTID-2026-01
Terv az egyéni résztvevői adatokhoz (IPD)
Tervezi megosztani az egyéni résztvevői adatokat (IPD)?
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