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Active, not recruitingNCT05001984TOPICAL-MRIUpdated Mar 26, 2025

Trial of PCSK9 Inhibition in Patients with Acute Stroke and Symptomatic Intracranial Atherosclerosis

A Phase 2 interventional study of Alirocumab in Intracranial Atherosclerosis, Acute Ischemic Stroke and ICAS - Intracranial Atherosclerosis, sponsored by Chang Gung Memorial Hospital. Active, not recruiting at 1 site in Taiwan. Open to participants aged 20 Years to 100 Years. Per ClinicalTrials.gov, last updated 2025-03-26.

Sponsored by Chang Gung Memorial Hospital · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Apr 2025, 1 year 5 months ago, but the record still lists the study as active, not recruiting.
Phase
Phase 2
Study type
Interventional
Enrollment
60
Allocation
Randomized
Ages
20 Years to 100 Years
Sex
All
01

Study summary

This study will evaluate whether low-density lipoprotein (LDL-C) lowering with alirocumab results in greater change from baseline in intracranial atherosclerotic plaque at week 26 than control in adults with acute ischemic stroke from intracranial atherosclerosis taking lipid lowering therapy.

Read the detailed description

In this trial, we will conduct a prospective, randomized, open-label, blinded end-point study using high-resolution MRI in patients with acute ischemic stroke from intracranial atherosclerosis to evaluate the efficacy and safety of alirocumab. We hypothesis that additional alirocumab treatment on a background of statin therapy could result in greater stabilization of intracranial plaque and regression of arterial stenosis.

02

Conditions studied

  • Intracranial Atherosclerosis
  • Acute Ischemic Stroke
  • ICAS - Intracranial Atherosclerosis

Keywords

  • Intracranial Atherosclerosis
  • Acute Ischemic Stroke
  • PCSK9 inhibitor
03

In context

Stroke

7,286 studies on the registry are indexed under Stroke; 2,007 are open to participants now.

This study's enrollment of 60 is above the median of 50 across 5,369 interventional studies indexed under Stroke.

Browse Stroke studies →

Lead sponsor

Chang Gung Memorial Hospital is the lead sponsor of 1,064 studies on the registry; 234 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
20 Years to 100 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Clinical diagnosis of ischemic stroke with National Institutes of Health Stroke Scale (NIHSS) score of 1-15
  • Ischemic lesions on diffuse-weighted imaging located in the territory of symptomatic intracranial atherosclerosis (ICAS).
  • Symptomatic ICAS (above 30%) at the M1 or M2 of the middle cerebral artery, basilar artery or at the intracranial portion of the internal carotid artery or vertebral artery.
  • Serum LDL-C ≥70 mg/dL for subjects on lipid-lowering therapies (such as a statin and/or ezetimibe) or LDL-C ≥100 mg/dL for subjects without lipid-lowering therapies.
  • Ability to randomize within 7 days of time last known free of new ischemic symptoms.
  • Ability to receive alirocumab or statin treatment within 7 days of stroke onset.
  • Head CT or MRI ruling out hemorrhage or other pathology, such as vascular malformation, tumor, or abscess, that could explain symptoms or contraindicate therapy.
  • Pre-stroke modified Rankin Scale (mRS)≦2

Exclusion criteria

Exclusion Criteria:

  • Age \<20 years.
  • Judged by clinical physician.
  • After endovascular intervention or endarterectomy for the symptomatic ICAS.
  • Patients with more than 50% stenosis of extra-cranial arteries the relevant arteries on magnetic resonance angiography (MRA), including extra-cranial carotid artery or vertebral arteries.
  • Patients with high risk of cardioembolic source, such as atrial fibrillation, acute myocardial infarction, severe heart failure or valvular heart disease.
  • Other determined stroke etiology, such as vasculitis, shock, antiphospholipid antibody syndrome, arterial dissection, CADASIL and etc.
  • Qualifying ischemic event induced by angiography or surgery.
  • Severe non-cardiovascular comorbidity with life expectancy \<6 months.
  • Contraindication or allergy to alirocumab or Gadolinium
  • Severe renal (serum creatinine >2 mg/dL) or calculated glomerular filtration rate \<30 mL/min/ 1.73 m2 by estimated glomerular filtration rate (eGFR) using Cockcroft Gault methodology.
  • Hepatic insufficiency (INR>1.2; ALT>40 U/L or any resultant complication, such as variceal bleeding, encephalopathy, or jaundice)
  • Hemostatic disorder or systemic bleeding in the past 3 months
  • Current thrombocytopenia (platelet count \<100 x109/L) or leukopenia (\<2 x109/L)
  • Anemia(\<10 mg/dL)
  • History of drug-induced hematologic or hepatic abnormalities
  • History of malignancy that required surgery, radiation therapy or systemic therapy.
  • Females who are pregnant or nursing, or who are of childbearing potential and unwilling to use effective contraception.
  • Other neurological conditions that would complicate assessment of outcomes during follow-up.
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Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Investigator, Outcomes assessor)
Enrollment
60 participants (actual)

Study arms

  • Active comparator
    Intervention group

    In addition to high-intensity statin and antiplatelet treatment, patients will receive treatment of alirocumab 75mg subcutaneously every 2 weeks for a total of 26 weeks

    Drug: Alirocumab

  • No intervention
    Control group

    Patient will have high-intensity statin and antiplatelet treatment.

Interventions

  • DrugAlirocumab

    Alirocumab 75mg subcutaneously every 2 weeks for a total of 26 weeks.

    Also known as: Praluent

06

What researchers measure

Primary outcomes

  1. The changes of intracranial atherosclerotic plaque: stenosis degree

    The changes of intracranial atherosclerotic plaque in vessel-wall MRI before and after 6-month treatment, measured as stenosis degree. The degree of stenosis was calculated as: (1-lumen area of stenotic lesion/reference lumen area)×100%.

    Time frame: 26 weeks

  2. The changes of intracranial atherosclerotic plaque: percent atheroma volume

    The changes of intracranial atherosclerotic plaque in vessel-wall MRI before and after 6-month treatment, measured as percent atheroma volume (PAV). The PAV was calculated using the following equation: PAV = Σ(EEM area - Lumen area) / ΣEEM area × 100, where EEM area is the cross-sectional area of the external elastic membrane and Lumen area is the cross-sectional area of the lumen.

    Time frame: 26 weeks

  3. The changes of intracranial atherosclerotic plaque: enhancement volume

    The changes of intracranial atherosclerotic plaque in vessel-wall MRI before and after 6-month treatment, measured as enhancement volume. The enhancement volume was measured as post-contrast plaque enhancement for intracranial arteries and intraplaque hemorrhage.

    Time frame: 26 weeks

Secondary outcomes

  1. Percentage of patients with major cardiovascular events

    Defined as the composite of cardiovascular death, myocardial infarction, transient ischemic attack, ischemic stroke and hemorrhagic stroke.

    Time frame: 26 weeks

  2. Percentage of patients with myocardial infarction

    patients with myocardial infarction

    Time frame: 26 weeks

  3. Percentage of patients with cardiovascular death

    patients with cardiovascular death

    Time frame: 26 weeks

  4. Percentage of patients with stroke

    Include transient ischemic attack, ischemic and hemorrhagic stroke

    Time frame: 26 weeks

  5. Percentage of patients with ischemic stroke or transient ischemic attack.

    Percentage of patients with ischemic stroke or transient ischemic attack.

    Time frame: 26 weeks

  6. Percentage of patients with new ischemic lesions

    Defined as new ischemic lesions in the territory of ICAS between 2 MRIs

    Time frame: 26 weeks

  7. Percentage of patients with favorable functional recovery

    Defined as a mRS ≦2 mRS. The Modified Rankin Scale (mRS) runs from 0-6, running from perfect health without symptoms(score 0) to death(score 6).

    Time frame: 3 months

  8. Changes in serum biomarkers

    Include liver function tests, HbA1c and lipid profiles.

    Time frame: 26 weeks

07

Study locations

1 site
  • Yenchu Huang
    Chiayi City, 613, Taiwan
08

References and documents

Publications

  • Holmstedt CA, Turan TN, Chimowitz MI. Atherosclerotic intracranial arterial stenosis: risk factors, diagnosis, and treatment. Lancet Neurol. 2013 Nov;12(11):1106-14. doi: 10.1016/S1474-4422(13)70195-9. PubMed 24135208 ↗
  • Wang Y, Zhao X, Liu L, Soo YO, Pu Y, Pan Y, Wang Y, Zou X, Leung TW, Cai Y, Bai Q, Wu Y, Wang C, Pan X, Luo B, Wong KS; CICAS Study Group. Prevalence and outcomes of symptomatic intracranial large artery stenoses and occlusions in China: the Chinese Intracranial Atherosclerosis (CICAS) Study. Stroke. 2014 Mar;45(3):663-9. doi: 10.1161/STROKEAHA.113.003508. Epub 2014 Jan 30. PubMed 24481975 ↗
  • Hurford R, Wolters FJ, Li L, Lau KK, Kuker W, Rothwell PM; Oxford Vascular Study Phenotyped Cohort. Prevalence, predictors, and prognosis of symptomatic intracranial stenosis in patients with transient ischaemic attack or minor stroke: a population-based cohort study. Lancet Neurol. 2020 May;19(5):413-421. doi: 10.1016/S1474-4422(20)30079-X. PubMed 32333899 ↗
  • Gao S, Wang YJ, Xu AD, Li YS, Wang DZ. Chinese ischemic stroke subclassification. Front Neurol. 2011 Feb 15;2:6. doi: 10.3389/fneur.2011.00006. eCollection 2011. PubMed 21427797 ↗
  • Xu W. High-resolution MRI of intracranial large artery diseases: how to use it in clinical practice? Stroke Vasc Neurol. 2019 Jun 20;4(2):102-104. doi: 10.1136/svn-2018-000210. eCollection 2019 Jul. PubMed 31338221 ↗
  • Xu WH, Li ML, Gao S, Ni J, Yao M, Zhou LX, Peng B, Feng F, Jin ZY, Cui LY. Middle cerebral artery intraplaque hemorrhage: prevalence and clinical relevance. Ann Neurol. 2012 Feb;71(2):195-8. doi: 10.1002/ana.22626. PubMed 22367991 ↗
  • Petrone L, Nannoni S, Del Bene A, Palumbo V, Inzitari D. Branch Atheromatous Disease: A Clinically Meaningful, Yet Unproven Concept. Cerebrovasc Dis. 2016;41(1-2):87-95. doi: 10.1159/000442577. Epub 2015 Dec 16. PubMed 26671513 ↗
  • Yamamoto Y, Ohara T, Hamanaka M, Hosomi A, Tamura A, Akiguchi I. Characteristics of intracranial branch atheromatous disease and its association with progressive motor deficits. J Neurol Sci. 2011 May 15;304(1-2):78-82. doi: 10.1016/j.jns.2011.02.006. Epub 2011 Mar 13. PubMed 21402390 ↗
  • Kim JS, Yoon Y. Single subcortical infarction associated with parental arterial disease: important yet neglected sub-type of atherothrombotic stroke. Int J Stroke. 2013 Apr;8(3):197-203. doi: 10.1111/j.1747-4949.2012.00816.x. Epub 2012 May 9. PubMed 22568537 ↗
  • Liu D, Liu J, Cai Y, Wong KSL, Liu L. Is the future of symptomatic intracranial atherosclerotic stenosis management promising? J Neurol Neurosurg Psychiatry. 2020 Feb;91(2):122-124. doi: 10.1136/jnnp-2019-321564. No abstract available. PubMed 31919104 ↗
  • Johnston SC, Easton JD, Farrant M, Barsan W, Conwit RA, Elm JJ, Kim AS, Lindblad AS, Palesch YY; Clinical Research Collaboration, Neurological Emergencies Treatment Trials Network, and the POINT Investigators. Clopidogrel and Aspirin in Acute Ischemic Stroke and High-Risk TIA. N Engl J Med. 2018 Jul 19;379(3):215-225. doi: 10.1056/NEJMoa1800410. Epub 2018 May 16. PubMed 29766750 ↗
  • Wang Y, Wang Y, Zhao X, Liu L, Wang D, Wang C, Wang C, Li H, Meng X, Cui L, Jia J, Dong Q, Xu A, Zeng J, Li Y, Wang Z, Xia H, Johnston SC; CHANCE Investigators. Clopidogrel with aspirin in acute minor stroke or transient ischemic attack. N Engl J Med. 2013 Jul 4;369(1):11-9. doi: 10.1056/NEJMoa1215340. Epub 2013 Jun 26. PubMed 23803136 ↗
  • Kim D, Park JM, Kang K, Cho YJ, Hong KS, Lee KB, Park TH, Lee SJ, Kim JG, Han MK, Kim BJ, Lee J, Cha JK, Kim DH, Nah HW, Kim DE, Ryu WS, Kim JT, Choi KH, Choi JC, Lee BC, Yu KH, Oh MS, Kim WJ, Kwon JH, Shin DI, Sohn SI, Hong JH, Lee JS, Lee J, Gorelick PB, Bae HJ. Dual Versus Mono Antiplatelet Therapy in Large Atherosclerotic Stroke. Stroke. 2019 May;50(5):1184-1192. doi: 10.1161/STROKEAHA.119.024786. PubMed 30932785 ↗
  • Chimowitz MI, Lynn MJ, Derdeyn CP, Turan TN, Fiorella D, Lane BF, Janis LS, Lutsep HL, Barnwell SL, Waters MF, Hoh BL, Hourihane JM, Levy EI, Alexandrov AV, Harrigan MR, Chiu D, Klucznik RP, Clark JM, McDougall CG, Johnson MD, Pride GL Jr, Torbey MT, Zaidat OO, Rumboldt Z, Cloft HJ; SAMMPRIS Trial Investigators. Stenting versus aggressive medical therapy for intracranial arterial stenosis. N Engl J Med. 2011 Sep 15;365(11):993-1003. doi: 10.1056/NEJMoa1105335. Epub 2011 Sep 7. Erratum In: N Engl J Med. 2012 Jul 5;367(1):93. PubMed 21899409 ↗
  • Weinberger J. Comparison of warfarin and aspirin for symptomatic intracranial arterial stenosis. Curr Cardiol Rep. 2006 Feb;8(1):7. No abstract available. PubMed 16507227 ↗
  • Amarenco P, Bogousslavsky J, Callahan A 3rd, Goldstein LB, Hennerici M, Rudolph AE, Sillesen H, Simunovic L, Szarek M, Welch KM, Zivin JA; Stroke Prevention by Aggressive Reduction in Cholesterol Levels (SPARCL) Investigators. High-dose atorvastatin after stroke or transient ischemic attack. N Engl J Med. 2006 Aug 10;355(6):549-59. doi: 10.1056/NEJMoa061894. PubMed 16899775 ↗
  • Grundy SM, Stone NJ, Bailey AL, Beam C, Birtcher KK, Blumenthal RS, Braun LT, de Ferranti S, Faiella-Tommasino J, Forman DE, Goldberg R, Heidenreich PA, Hlatky MA, Jones DW, Lloyd-Jones D, Lopez-Pajares N, Ndumele CE, Orringer CE, Peralta CA, Saseen JJ, Smith SC Jr, Sperling L, Virani SS, Yeboah J. 2018 AHA/ACC/AACVPR/AAPA/ABC/ACPM/ADA/AGS/APhA/ASPC/NLA/PCNA Guideline on the Management of Blood Cholesterol: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines. Circulation. 2019 Jun 18;139(25):e1082-e1143. doi: 10.1161/CIR.0000000000000625. Epub 2018 Nov 10. PubMed 30586774 ↗
  • Stone NJ, Robinson JG, Lichtenstein AH, Bairey Merz CN, Blum CB, Eckel RH, Goldberg AC, Gordon D, Levy D, Lloyd-Jones DM, McBride P, Schwartz JS, Shero ST, Smith SC Jr, Watson K, Wilson PW, Eddleman KM, Jarrett NM, LaBresh K, Nevo L, Wnek J, Anderson JL, Halperin JL, Albert NM, Bozkurt B, Brindis RG, Curtis LH, DeMets D, Hochman JS, Kovacs RJ, Ohman EM, Pressler SJ, Sellke FW, Shen WK, Smith SC Jr, Tomaselli GF; American College of Cardiology/American Heart Association Task Force on Practice Guidelines. 2013 ACC/AHA guideline on the treatment of blood cholesterol to reduce atherosclerotic cardiovascular risk in adults: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. Circulation. 2014 Jun 24;129(25 Suppl 2):S1-45. doi: 10.1161/01.cir.0000437738.63853.7a. Epub 2013 Nov 12. No abstract available. Erratum In: Circulation. 2014 Jun 24;129(25 Suppl 2):S46-8. Circulation. 2015 Dec 22;132(25):e396. doi: 10.1161/CIR.0000000000000346. PubMed 24222016 ↗
  • Schwartz GG, Steg PG, Szarek M, Bhatt DL, Bittner VA, Diaz R, Edelberg JM, Goodman SG, Hanotin C, Harrington RA, Jukema JW, Lecorps G, Mahaffey KW, Moryusef A, Pordy R, Quintero K, Roe MT, Sasiela WJ, Tamby JF, Tricoci P, White HD, Zeiher AM; ODYSSEY OUTCOMES Committees and Investigators. Alirocumab and Cardiovascular Outcomes after Acute Coronary Syndrome. N Engl J Med. 2018 Nov 29;379(22):2097-2107. doi: 10.1056/NEJMoa1801174. Epub 2018 Nov 7. PubMed 30403574 ↗
  • Hadjiphilippou S, Ray KK. Evolocumab and clinical outcomes in patients with cardiovascular disease. J R Coll Physicians Edinb. 2017 Jun;47(2):153-155. doi: 10.4997/JRCPE.2017.212. No abstract available. PubMed 28675189 ↗
  • Huynh K. Dyslipidaemia. Assessing the efficacy and safety of evolocumab and alirocumab. Nat Rev Cardiol. 2015 May;12(5):261. doi: 10.1038/nrcardio.2015.51. Epub 2015 Mar 31. No abstract available. PubMed 25824512 ↗
  • Chung JW, Cha J, Lee MJ, Yu IW, Park MS, Seo WK, Kim ST, Bang OY. Intensive Statin Treatment in Acute Ischaemic Stroke Patients with Intracranial Atherosclerosis: a High-Resolution Magnetic Resonance Imaging study (STAMINA-MRI Study). J Neurol Neurosurg Psychiatry. 2020 Feb;91(2):204-211. doi: 10.1136/jnnp-2019-320893. Epub 2019 Aug 1. PubMed 31371644 ↗
  • Huang YC, Chang CH, Tsai YH, Weng HH, Lin LC, Lee JD. PCSK9 inhibition in patients with acute stroke and symptomatic intracranial atherosclerosis: protocol for a prospective, randomised, open-label, blinded end-point trial with vessel-wall MR imaging. BMJ Open. 2022 Apr 29;12(4):e060068. doi: 10.1136/bmjopen-2021-060068. PubMed 35487727 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 26, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05001984
Lead sponsor
Chang Gung Memorial Hospital
Collaborators
Chang Gung University
Responsible party
Sponsor
First posted
Aug 12, 2021
Start date
Aug 1, 2021
Primary completion
Apr 15, 2025 (estimated)
Completion
Apr 15, 2025 (estimated)
Last update
Mar 26, 2025

Study contacts

Yenchu Huang, MD
study director · Chang Gung Memorial Hospital, Chiayi

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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