Clinical trial NCT02998918: Effects of Short-term Curcumin and Multi-polyphenol Supplementation on the Anti-inflammatory Properties of HDL
Official title: Effects of Short-term Curcumin and Multi-polyphenol Supplementation on the Anti-inflammatory Properties of HDL
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Inflammation
Atherosclerosis
Cardiovascular Disease
Keywords: Inflammation
HDL
Anti-inflammatory
Supplementation
Curcumin
polyphenol
V-cam
I-cam
atherosclerosis
cardiovascular disease
atherogenesis
antioxidant
resveratrol
quercetin
Lead sponsor: University of South Carolina
Sponsor class: OTHER
First posted: 2016-12-21
Enrollment: 21
Sex: ALL
Minimum age (years): 18
Maximum age (years): 60
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: BASIC_SCIENCE

Brief summary: Polyphenol supplements, including curcumin and resveratrol, are known to decrease inflammation, but previous polyphenol supplements were poorly absorbed and thus their effects were reduced. A new phytosome formulation coats the supplements and allows them to be better absorbed. The purpose of this study is to examine the acute (1-hr) and short-term (1-week) effects of two different phytosome-formulated polyphenol supplements on inflammation. The two supplements that will be used are: 1) PolyResveratrol and 2) Curcumin.

Detailed description: Atherosclerosis is a chronic inflammatory disease underlying coronary artery disease, driven in part by the innate immune system, particularly macrophages. The adhesion of leukocytes to the vascular endothelium, mediated by endothelial cellular adhesion molecules including vascular adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1), is one of the crucial initial steps in atherogenesis. Elevated levels of high-density lipoprotein cholesterol (HDL-C) are associated with reduced risk for cardiovascular disease (CVD); however, interventions designed to increase HDL-C concentration in humans have yet to lead to reductions in cardiovascular events. A possible explanation for the failure of recent clinical trials is the structural and functional complexity of HDL particles, which have multiple cardioprotective properties, including anti-inflammatory, antioxidative, and reverse cholesterol transport activities. The anti-inflammatory effects of HDL include reduction of inflammatory cytokines and vascular leukocyte adhesion molecules. A recent study showed that dietary composition can affect HDL's anti-inflammatory properties, namely the ability to inhibit the expression of ICAM-1 and VCAM-1.

Numerous studies have shown that polyphenols, including curcumin, quercetin, and resveratrol, exhibit multiple health benefits, including anti-inflammatory properties. Curcumin is a flavonoid polyphenol that is the active ingredient in the spice turmeric. Quercetin is one of the most abundant dietary flavonoids and is found in many fruits, vegetables, and beverages. Resveratrol is a non-flavonoid polyphenol present in a limited number of plant-derived foods, including grapes and peanuts. In vitro studies show these three polyphenols independently decrease VCAM-1 and ICAM-1 expression induced by tumor necrosis factor alpha (TNFα) in human endothelial cells, as well as increase cholesterol efflux to apolipoprotein A-I (apoA-I) and HDL in macrophages. However, previous in vitro models used direct incubation with each polyphenol (i.e., HDL was directly exposed to the polyphenol in the cell culture, as opposed to incubation with plasma after consumption of the polyphenol), with doses much higher than found in typical human diets or supplements.

The health effects of polyphenols in humans are limited by their poor bioavailability, as they are rapidly metabolized and excreted. Recent studies have found that formulating poorly-absorbed molecules with phosphatidylcholine via phytosomes increases their bioavailability. For example, recent studies comparing curcumin phytosome (Meriva®) and standard curcumin formulations in humans found that the curcumin phytosome formulation increased curcuminoid bioavailability between 8- to 29-fold. To our knowledge, no study has examined the effects of polyphenol supplementation, particularly phytosome-formulated polyphenols, in humans on the ability of circulating plasma to inhibit the expression of cellular adhesion molecules or enhance cholesterol efflux capacity in vitro. Furthermore, it is unknown whether polyphenol supplementation modulates the ability of HDL particles to perform these same functions.

Therefore, the purpose of this study is to examine whether acute and short-term (1-week) polyphenol supplementation in humans affects inflammation measured at the whole plasma level, as well as the inflammatory and cholesterol efflux properties of HDL particles. The investigators will test the effects of two supplements in a cross-over design: a curcumin phytosome and a multi-polyphenol supplement (containing curcumin phytosome, quercetin phytosome, and trans-resveratrol). The investigators hypothesize that one of the mechanisms by which polyphenols exert a beneficial effect on inflammation and atherosclerosis is through its modulation of HDL particles.

Eligibility criteria: Inclusion Criteria:

* General good health
* Between 18 and 60 years old
* Non-smoker
* Not taking any medications or dietary supplements

Exclusion Criteria:

* Taking prescription anti-inflammatory drugs or supplements/drugs that may affect inflammation

Primary outcomes:
measure: Inflammation Change: HDL Plasma
timeFrame: One week
Secondary outcomes:
Other outcomes:
Locations:
city: Columbia
country: United States
facility: Clinical Exercise Research Center
state: South Carolina
Study officials:
affiliation: University of South Carolina
name: Mark Sarzynski
role: PRINCIPAL_INVESTIGATOR
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