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The study seeks to determine if the use of omega three fatty acids in individuals infected with HIV and with high triglycerides leads to improved triglyceride levels, better blood vessel function and decrease in the amount of obstruction in blood vessels.
While omega-three fatty acids have been shown to be beneficial for TG and HDL-C levels in HIV uninfected individuals and in some small, short duration studies in HIV-infected individuals, there are no data that extend these observations to determine whether intake of omega-three fats over a more prolonged time period will also have a beneficial impact on functional outcomes such as vascular endothelial function and anatomic surrogate markers of CVD in HIV-infected patients.
We propose a randomized, double blind trial of purified omega-three fatty acids in HIV-infected individuals with elevated levels of triglycerides. While the impact of omega-three fatty acids on lipid profiles should be evident early (within 12 weeks); we propose to conduct this trial for a full 24 months to test our overall hypothesis that this intervention will not only improve triglyceride and HDL-C levels, improve HDL-subpopulations, plasma and membrane phospholipids and decrease inflammation, but will also improve brachial artery relaxation testing (BART) as a measure of vascular endothelial function at 24 weeks and lead to a reduced rate of progression of carotid intima thickness (cIMT) as a surrogate marker of CVD at 24 months when compared to controls.
The specific aims of this proposal include:
1. To conduct a randomized, placebo controlled trial of omega-three fatty acids over 24 months in HIV-infected individuals with elevated levels of triglycerides (> 150 mg/dl).
2. To demonstrate the impact of omega-three fatty acid intake on TG levels and on HDL-C levels, HDL subpopulations, composition of plasma and membrane phospholipids, and chronic inflammation as measured by CRP, sPLA2 and by levels of arachidonic acid.
3. To demonstrate the impact of omega-three fatty acid intake on BART at 24 weeks and on cIMT at 24 months.
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment
High Triglyceride Level
Tufts University School of Medicine
Published on BioPortfolio: 2014-08-27T03:16:58-0400
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An autosomal dominant disorder of lipid metabolism. It is caused by mutations of APOLIPOPROTEINS B, main components of CHYLOMICRONS and BETA-LIPOPROTEINS (low density lipoproteins or LDL). Features include abnormally low LDL, normal triglyceride level, and dietary fat malabsorption.
An autosomal recessive disorder of lipid metabolism. It is caused by mutation of the microsomal triglyceride transfer protein that catalyzes the transport of lipids (TRIGLYCERIDES; CHOLESTEROL ESTERS; PHOSPHOLIPIDS) and is required in the secretion of BETA-LIPOPROTEINS (low density lipoproteins or LDL). Features include defective intestinal lipid absorption, very low serum cholesterol level, and near absent LDL.
A natural high-viscosity mucopolysaccharide with alternating beta (1-3) glucuronide and beta (1-4) glucosaminidic bonds. It is found in the UMBILICAL CORD, in VITREOUS BODY and in SYNOVIAL FLUID. A high urinary level is found in PROGERIA.
A glycoprotein that is central in both the classical and the alternative pathway of COMPLEMENT ACTIVATION. C3 can be cleaved into COMPLEMENT C3A and COMPLEMENT C3B, spontaneously at low level or by C3 CONVERTASE at high level. The smaller fragment C3a is an ANAPHYLATOXIN and mediator of local inflammatory process. The larger fragment C3b binds with C3 convertase to form C5 convertase.
A minor apolipoprotein that associates with HIGH-DENSITY LIPOPROTEINS (HDL), VERY-LOW-DENSITY LIPOPROTEINS (VLDL), and CHYLOMICRONS. It regulates levels of plasma TRIGLYCERIDES by activating APOLIPOPROTEIN C-II LIPOPROTEIN LIPASE and inhibiting hepatic VLDL triglyceride hydrolysis.
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