Sonodynamic Therapy in the Treatment of Carotid Atherosclerosis

Study Overview
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Brief Summary
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Sonodynamic therapy (SDT) is a new treatment for carotid atherosclerotic plaque. The purpose of this study is to evaluate the safety and initial effectiveness of this technique.

Detailed Description
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Carotid atherosclerotic plaque is an important cause of ischemic stroke. Treatments for patients with carotid plaque include lifestyle changes, medical management(such as control of hyperlipidemia, hypertension, and diabetes) and carotid revascularization(carotid endarterectomy or carotid artery stenting). Studies have suggested that plaque morphology and composition are important determinants of plaque stability, using serial MR imaging of the carotid artery allowed observation of changes in plaque composition. Contrast enhanced ultrasound (CEUS) is a well accepted technique for detection of intraplaque neovascularization(IPN) in carotid atherosclerotic disease. The purpose of this trial is to evaluate the safety and initial effectiveness of SDT. The SDT can induce macrophage elimination and inhibit matrix degradation, which will promote plaque lipid depletion, inflammation level decrease and changes in other plaque tissue components, leading to plaque stabilization and reduction.

Official Title
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Sonodynamic Therapy Manipulates Atherosclerosis Regression Trial on Patients With Carotid Atherosclerotic Plaques

Conditions
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Carotid Atherosclerosis

Intervention / Treatment
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* Combination Product: Sonodynamic therapy (SDT)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age 18- 80 years Carotid artery with 30% 70% stenosis by ultrasound and plaque thickness>2.5mm Patients without transient ischemic attack, minor stroke or amaurosis fugax within 6 months Patients' LDL-c level below 100 mg/dL(2.6mmol/L), well-controlled blood pressure(systolic BP<140 and diastolic BP<90 under resting conditions) and diabetes(HbA1c<7%) Written informed consent Exclusion Criteria: Non-atherosclerotic carotid artery stenosis Contraindication to MRI( uses pacemaker, has metallic implants, claustrophobia) Acute MI, acute coronary syndrome or stroke within 4 weeks prior to visit Severe cerebral artery stenosis, atrial fibrillation or MRI detected thrombosis that would cause stroke Previous significant adverse reaction to a statin Systemic disorders such as hepatic, renal, hematologic, and malignant disease Medical history that might limit the individual's ability to take trial treatments for the duration of the study Allergic to DVDMS or sonovue Diagnosis of porphyria Pregnant women and nursing mothers History of bilateral carotid endarterectomy or has immediate plans for carotid endarterectomy Patient who is attending other clinical trial

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Sonodynamic therapy(SDT)<br>Sonodynamic therapy(SDT) treatment is the combination of sonosensitizer administration and target atherosclerotic lesions ultrasound exposure. | Combination Product: Sonodynamic therapy (SDT)<br>* Sinoporphyrin sodium (DVDMS) as sonosensitizer, is dissolved in 0.9% sodium solution for following skin test and intravenous injection. 0.01mg/ml DVDMS solution (0.1ml) is prepared for skin test followed by 0.04 mg/ml DVDMS solution intravenous injection (0.2mg/kg).The target atherosclerotic lesions are marked on the corresponding skin with ultrasound guidance and underwent ultrasound exposure after 4 hours incubation. The therapeutic ultrasonic transducer is fixed to the marked skin site for 15min of each lesion. Ultrasound parameters included intensity of 1.6W/cm2 for carotid lesions, resonance frequency: 1.0 MHz and duty factor: 30%.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in plaque LRNC volume, as assessed by MRI | The changes in plaque lipid-rich necrotic core (LRNC) volume as assessed by MRI. | Measured at Baseline, 1, 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in plaque FT volume, as assessed by MRI | The changes in plaque fibrous tissue(FT) volume as assessed by MRI. | Measured at Baseline, 1, 3 months | 
| Change in IPH volume, as assessed by MRI | The changes in intraplaque hemorrhage (IPH) volume as assessed by MRI. | Measured at Baseline, 1, 3 months | 
| Change in calcification volume, as assessed by MRI | The changes in calcification volume as assessed by MRI. | Measured at Baseline, 1, 3 months | 
| Change in the status of fibrous cap, as assessed by MRI | The status of fibrous cap can be differentiated as thin/thick/ruptured assessed by MRI. | Measured at Baseline, 1, 3 months | 
| Change in plaque wall volume, as assessed by MRI | The changes in plaque wall volume(mm3) as assessed by MRI | Measured at Baseline, 1, 3 months | 
| Change in MVE, as assessed by CEUS | The changes in normalised maximal video-intensity enhancement (MVE) are calculated to quantify the density of IPN as assessed by CEUS. | Measured at Baseline, 1, 3 months | 
| Change in peak flow velocity, as assessed by doppler ultrasound | The changes of the systolic and diastolic peak flow velocity of the affected segments by doppler ultrasound. | Measured at Baseline, 1, 3 months | 
| MACCE | incidence of major adverse cardiovascular and cerebrovascular events(MACCE) | Measured at Baseline, 1, 3 months | 
| Incidence of adverse events | Allergic to sunshine,hepatic or renal dysfunction,thyroid dysfunction | Measured at Baseline, 1, 3 months | 
| Lipid change | To evaluate the change in lipid levels. | Measured at Baseline, 1, 3 months |