Carotid Plaque Characteristics by MRI in AIM-HIGH (Carotid MRI Substudy)
2018년 2월 7일 업데이트: Xue-Qiao Zhao, University of Washington
Carotid Plaque Characteristics by MRI in AIM-HIGH
Heart attacks and strokes caused by the unstable atherosclerotic plaques remain the leading cause of death in the United States.
Unstable plaques often have more fat than stable plaques.
This study will investigate if a treatment with LDL-lowering plus HDL-raising compared with LDL-lowering alone would more effectively reduce the plaque fat content assessed by magnetic resonance imaging (MRI), therefore, further reducing heart attacks and strokes.
연구 개요
상세 설명
Although studies have suggested that plaque morphology and composition are important determinants of plaque stability, our understanding on plaque tissue components is mainly from histological studies until recent development in MRI technique. A low level of HDL is associated with higher risk of cardiovascular events and increased amount of lipid content in the carotid plaques. Treatment with LDL-lowering plus HDL-raising compared with LDL-lowering alone more effectively protects against atherosclerosis progression. It is widely believed that HDL or its apolipoproteins mediate the removal of excess free cholesterol from peripheral cells and the cholesterol is delivered via either LDL or HDL to the liver for excretion into the bile. However, it has not been tested and approved in human atherosclerotic condition in vivo. The NIH/Abbott-funded multi-center AIM-HIGH trial is designed to compare the clinical efficacy of LDL-lowering alone with statin versus LDL-lowering plus HDL-raising with statin plus nicotinic acid combination therapy in patients with established vascular disease and high triglycerides and low HDL.
We propose to conduct a carotid MRI sub-study in 220 subjects enrolled in AIM-HIGH to investigate the important vascular biological mechanisms of HDL-raising therapy. Image collection will occur at 3 timepoints. The hypotheses and specific aims are:
- (1) To test the primary hypothesis that compared with LDL-lowering alone, intensive LDL-lowering plus HDL-raising therapy decreases the mean plaque lipid composition in carotid arteries assessed by MRI.
- (2) To test the hypothesis that compared with LDL-lowering alone, intensive LDL-lowering plus HDL-raising therapy decreases the plaque burden including volume and wall thickness.
- (3) To test the hypothesis that increased plaque lipid composition or vessel wall thickness by MRI is associated with increased risk of cardiovascular events.
- (4)To test a hypothesis that LDL-lowering plus HDL-raising, compared to LDL-lowering alone, will promote more rapid plaque lipid depletion. And determine the time-course of atherosclerotic plaque lipid depletion during lipid therapy.
- (5) To examine the association of clinical risk factors, lipids, lipoprotein heterogeneity, inflammatory markers and carotid plaque characteristics.
This MRI sub-study offers a unique opportunity to investigate the effectiveness of LDL-lowering plus HDL-raising therapy on human atherosclerotic plaque in vivo, to examine the association of plaque characteristics both lipid composition and volume assessed by MRI and cardiovascular outcome, and to gain novel insights in our understanding of atherosclerotic plaque pathology and the mechanisms of intensive lipid management in preventing cardiovascular events.
연구 유형
관찰
등록 (실제)
230
연락처 및 위치
이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.
연구 장소
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Arizona
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Phoenix, Arizona, 미국, 85032
- Cardiovascular Consultants
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California
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Long Beach, California, 미국, 90822
- Long Beach VA Medical Center
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Los Angeles, California, 미국, 90033
- University of Southern California
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Maryland
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Baltimore, Maryland, 미국, 21201
- University of Maryland
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Baltimore, Maryland, 미국, 21205
- Johns Hopkins University
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Minnesota
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Rochester, Minnesota, 미국, 55905
- Mayo Clinic
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North Carolina
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Durham, North Carolina, 미국, 27710
- Duke University
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Winston-Salem, North Carolina, 미국, 27157
- Wake Forest University
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Pennsylvania
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Philadelphia, Pennsylvania, 미국, 19104
- Philadelphia VA Medical Center
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Texas
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Houston, Texas, 미국, 77030
- Baylor College of Medicine
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Houston, Texas, 미국, 77030
- Methodist Hospital
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Houston, Texas, 미국, 77030
- Kelsey Research Foundation
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Washington
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Seattle, Washington, 미국, 98104
- Harborview Medical Center
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Seattle, Washington, 미국, 98105
- University of Washington
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Seattle, Washington, 미국, 98108
- Puget Sound VA Medical Center, Seattle Campus
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Alberta
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Calgary, Alberta, 캐나다, T2E-7C5
- Heart Health Institute
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Calgary, Alberta, 캐나다, T2N-2T9
- University Of Calgary
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British Columbia
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Vancouver, British Columbia, 캐나다, V5Z-1M9
- Vancouver General Hospital
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Ontario
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London, Ontario, 캐나다, N6A-5A5
- University of Western Ontario
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참여기준
연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.
자격 기준
공부할 수 있는 나이
45년 이상 (성인, 고령자)
건강한 자원 봉사자를 받아들입니다
아니
연구 대상 성별
모두
샘플링 방법
확률 샘플
연구 인구
Participants in the main AIM-HIGH study (NCT00120289)
설명
Inclusion Criteria:
- Eligible for main AIM-HIGH study (NCT00120289)
- Medically able to undergo MRI procedure
- Willing to provide informed consent for participation in this substudy
Exclusion Criteria:
- Uses pacemaker or has metallic implants
- History of bilateral carotid endarterectomy
- Glomerular filtration rate less than 60 mL/min/1.73 m^2
공부 계획
이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.
연구는 어떻게 설계됩니까?
디자인 세부사항
- 관찰 모델: 보병대
- 시간 관점: 유망한
코호트 및 개입
그룹/코호트 |
개입 / 치료 |
|---|---|
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심바스타틴
심바스타틴을 투여받는 주요 AIM-HIGH 연구 참가자.
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Participants will be enrolled in this substudy only if they are candidates for the main AIM-HIGH study (NCT00120289).
Participants will be randomly assigned to simvastatin or simvastatin plus niacin as a part of the main AIM-HIGH protocol, and adjustments in simvastatin and/or niacin doses will be made as per the protocol for the main AIM-HIGH study.
다른 이름들:
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심바스타틴 및 연장 방출 니아신
심바스타틴과 서방형 니아신을 투여받는 주요 AIM-HIGH 연구 참가자.
|
Participants will be enrolled in this substudy only if they are candidates for the main AIM-HIGH study (NCT00120289).
Participants will be randomly assigned to simvastatin or simvastatin plus niacin as a part of the main AIM-HIGH protocol, and adjustments in simvastatin and/or niacin doses will be made as per the protocol for the main AIM-HIGH study.
다른 이름들:
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연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
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Mean plaque lipid composition in carotid arteries assessed by MR
기간: Through 24Months post AIM-HIGH Randomization
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To test the primary hypothesis that compared with LDL-lowering alone, intensive LDL-lowering plus HDL-raising therapy decreases the mean plaque lipid composition in carotid arteries assessed by MRI.
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Through 24Months post AIM-HIGH Randomization
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2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
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Additional plaque characteristics as assessed by MRI
기간: Through 24Months post AIM-HIGH Randomization
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To test the additional hypotheses regarding plaque burden, plaque lipid depletion time course, association with cardiovascular event risk and lipid characteristics.
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Through 24Months post AIM-HIGH Randomization
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공동 작업자 및 조사자
여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.
간행물 및 유용한 링크
연구에 대한 정보 입력을 담당하는 사람이 자발적으로 이러한 간행물을 제공합니다. 이것은 연구와 관련된 모든 것에 관한 것일 수 있습니다.
일반 간행물
- Hippe DS, Phan BAP, Sun J, Isquith DA, O'Brien KD, Crouse JR, Anderson T, Huston J, Marcovina SM, Hatsukami TS, Yuan C, Zhao XQ. Lp(a) (Lipoprotein(a)) Levels Predict Progression of Carotid Atherosclerosis in Subjects With Atherosclerotic Cardiovascular Disease on Intensive Lipid Therapy: An Analysis of the AIM-HIGH (Atherothrombosis Intervention in Metabolic Syndrome With Low HDL/High Triglycerides: Impact on Global Health Outcomes) Carotid Magnetic Resonance Imaging Substudy-Brief Report. Arterioscler Thromb Vasc Biol. 2018 Mar;38(3):673-678. doi: 10.1161/ATVBAHA.117.310368. Epub 2018 Jan 4.
- Sun J, Zhao XQ, Balu N, Hippe DS, Hatsukami TS, Isquith DA, Yamada K, Neradilek MB, Canton G, Xue Y, Fleg JL, Desvigne-Nickens P, Klimas MT, Padley RJ, Vassileva MT, Wyman BT, Yuan C. Carotid magnetic resonance imaging for monitoring atherosclerotic plaque progression: a multicenter reproducibility study. Int J Cardiovasc Imaging. 2015 Jan;31(1):95-103. doi: 10.1007/s10554-014-0532-7. Epub 2014 Sep 13.
- Chen H, Sun J, Kerwin WS, Balu N, Neradilek MB, Hippe DS, Isquith D, Xue Y, Yamada K, Peck S, Yuan C, O'Brien KD, Zhao XQ. Scan-rescan reproducibility of quantitative assessment of inflammatory carotid atherosclerotic plaque using dynamic contrast-enhanced 3T CMR in a multi-center study. J Cardiovasc Magn Reson. 2014 Aug 1;16(1):51. doi: 10.1186/s12968-014-0051-7.
- Zhao XQ, Hatsukami TS, Hippe DS, Sun J, Balu N, Isquith DA, Crouse JR 3rd, Anderson T, Huston J 3rd, Polissar N, O'Brien K, Yuan C; AIM-HIGH Carotid MRI Sub-study Investigators. Clinical factors associated with high-risk carotid plaque features as assessed by magnetic resonance imaging in patients with established vascular disease (from the AIM-HIGH Study). Am J Cardiol. 2014 Nov 1;114(9):1412-9. doi: 10.1016/j.amjcard.2014.08.001. Epub 2014 Aug 13.
- Zhao XQ, Sun J, Hippe DS, Isquith DA, Canton G, Yamada K, Balu N, Crouse JR 3rd, Anderson TJ, Huston J 3rd, O'Brien KD, Hatsukami TS, Yuan C; AIM-HIGH Carotid MRI Substudy Investigators. Magnetic Resonance Imaging of Intraplaque Hemorrhage and Plaque Lipid Content With Continued Lipid-Lowering Therapy: Results of a Magnetic Resonance Imaging Substudy in AIM-HIGH. Circ Cardiovasc Imaging. 2022 Nov;15(11):e014229. doi: 10.1161/CIRCIMAGING.122.014229. Epub 2022 Nov 15.
- O'Brien KD, Hippe DS, Chen H, Neradilek MB, Probstfield JL, Peck S, Isquith DA, Canton G, Yuan C, Polissar NL, Zhao XQ, Kerwin WS. Longer duration of statin therapy is associated with decreased carotid plaque vascularity by magnetic resonance imaging. Atherosclerosis. 2016 Feb;245:74-81. doi: 10.1016/j.atherosclerosis.2015.11.032. Epub 2015 Dec 1.
연구 기록 날짜
이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.
연구 주요 날짜
연구 시작
2008년 3월 1일
기본 완료 (실제)
2013년 4월 1일
연구 완료 (실제)
2015년 2월 1일
연구 등록 날짜
최초 제출
2010년 8월 5일
QC 기준을 충족하는 최초 제출
2010년 8월 6일
처음 게시됨 (추정)
2010년 8월 10일
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
2018년 2월 9일
QC 기준을 충족하는 마지막 업데이트 제출
2018년 2월 7일
마지막으로 확인됨
2018년 2월 1일
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
- 627
- R01HL088214 (미국 NIH 보조금/계약)
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