Wednesday, March 20, 2013

Reduce Stubbornly High Triglycerides

Reposted from Life Extension

http://www.lef.org/magazine/mag2011/jun2011_Reduce-Stubbornly-High-Triglycerides_01.htm

By Jen Storch
Reduce Stubbornly High Triglycerides
Hundreds of published studies document the ability of vitamin E to combat cancer, heart disease, obesity, kidney failure, neurodegenerative disorders, and inflammatory responses.1-6
At the same time, we know that conventional vitamin E (alpha-tocopherol) does not by itself confer the omnibus protection that aging people need to remain disease-free.
Scientists continue to uncover unique biological properties of a class of vitamin E compounds called tocotrienols. In late 2010, researchers in Singapore released findings from a human study showing that a tocotrienol extract slashed levels of artery-clogging triglycerides by 28%.7
In this article you will learn of the implications this discovery has for individuals with stubbornly high blood lipid levels characteristic of the constellation of pathologies known as metabolic syndrome.

Why High Triglycerides Are Dangerous

Triglycerides accumulate in various organs, where they exert numerous harmful effects, most prominently in cardiac tissue.8 They influence expression of genes related to susceptibility to coronary artery disease.9 Accumulating in the heart, they reduce left ventricular function in a fashion specific to people with metabolic disorders.10
Triglycerides also trigger increased platelet activation, substantially boosting risk of dangerous clot formation. Elevated triglycerides increase incidence of stroke—a risk that can be mitigated by lowering levels of these dangerous fat compounds.11,12
Elevated triglycerides contribute to the three-fold elevation of cardiovascular disease risk seen in those with metabolic syndrome.13,14 People with type 2 diabetes and high liver triglyceride content have poorer blood flow and impaired energy metabolism in their heart tissue.15

The Singapore Study

The Singapore Study
A report published in 2002 revealed a startling 40% of adults 60 years and older suffered from metabolic syndrome,16 placing them at considerably higher risk for heart attack, stroke, and other age-related diseases.
A common characteristic of metabolic syndrome is high blood levels of LDL and triglycerides, along with impaired glucose control, abdominal obesity, and hypertension.
Previous reports indicated that tocotrienols could improve the body’s ability to safely lower LDL and triglycerides. A team of Singapore researchers performed a multi-phase study to determine precisely how tocotrienols can exert such favorable effects on blood lipid profiles.7
The Singapore team began with cultured human liver cells, moved on to mice, and finally to human subjects.7
The cell culture studies revealed that tocotrienols (gamma & delta) suppressed gene expression involved in lipid (fat) formation, driving down production of triglycerides and cholesterol. Tocotrienols further enhanced clearance of LDL by up-regulating genes governing LDL’s ability to attach to cells.
Animal models revealed that tocotrienol treatment of mice with elevated cholesterol and triglycerides reduced total cholesterol by 25% and triglyceride levels by 19%.7 (Levels of beneficial HDL were not suppressed.)
The human portion of the study showed that serum triglyceride levels plummeted by 28% in subjects taking 120 mg per day of gamma-delta-tocotrienol.7 This was accompanied by a reduction of about 13% in very-low density lipoprotein (VLDL), another lipid involved in arterial occlusion. Tocotrienols were also shown to suppress levels of chylomicrons, lipoprotein complexes that transport fats from your intestines to the liver and other parts of your body.7
Tocotrienols, particularly gamma-tocotrienol, have been linked to anti-cancer actions, primarily through their antioxidant and anti-inflammatory effects.

Confirmatory Studies

An abundance of supportive data reinforces the Singapore team’s findings.
Confirmatory Studies
Diabetic rats treated with palm oil-derived tocotrienols had significantly lower levels of total cholesterol, LDL, and triglycerides, and higher HDL levels compared with control animals. Further, the supplemented animals had lower blood sugar and hemoglobin A1c (HbA1c) levels, and microscopic examination of their major blood vessels revealed substantially less disruption than seen in untreated controls.17
Tocotrienols suppress differentiation of pre-adipocytes into mature adipocytes (fat cells), helping to reduce the overall burden of inflammation-generating fat tissue.18 They also reduce synthesis of triglycerides and VLDL particles in the liver, contributing to a reduction in fatty liver in animal studies.7,19
A tocotrienol-rich palm oil preparation has been shown to reduce total cholesterol and LDL levels by as much as 37% in aging individuals with abnormal lipid profiles.20,21 Both tocotrienol-rich palm oil, rice oils, and purified tocotrienols at doses of approximately 100-200 mg per day have induced these beneficial effects.22-24
Diabetics are at especially high risk for these dyslipidemias, and tocotrienol supplements can be particularly helpful in that context. Perhaps because of their especially disrupted lipid profiles, diabetics experience even more powerful lipid-lowering effects from tocotrienol supplementation, including as much as a 42% reduction in LDL.25
As potent antioxidants, tocotrienols have been shown to induce regression of carotid artery narrowing in patients at risk for stroke from atherosclerosis and inhibit LDL oxidation, a precursor to the formation of atherosclerotic lesions.26,27
What You Need to Know: Tocotrienols
  • A 2010 study revealed that tocotrienols, a set of four compounds contained within vitamin E, slash triglyceride levels in humans.
  • Supportive research underscores their ability to powerfully suppress many of the cofactors implicated in metabolic syndrome.
  • At doses of 100-200 mg per day, they have been shown to reduce total cholesterol and LDL levels by as much as 37% in aging individuals with abnormal lipid profiles.
  • Tocotrienols’ potent and multitargeted anti-inflammatory effects also effectively combat cancer and neurodegenerative disease.

Quenching the Pro-Inflammatory Fire

Inflammation lies at the core of most chronic age-related diseases. Tocotrienols exert powerful anti-inflammatory effects throughout the body.
Anti-Cancer Mechanisms
They have been shown to attenuate oxidative stress in diabetic tissues, halting a pro-inflammatory cascade that otherwise leads to diabetic neuropathy (nerve pain and damage).28 Tocotrienols favorably modulate the gene-regulating “master switch” nuclear factor-kappaB (NF-kB) to down-regulate expression of cytokines that wreak inflammatory havoc on a host of target tissues.29-31 This mechanism of action protects vulnerable organs such as the kidney from many of the consequences of metabolic syndrome.
Still further along the same pro-inflammatory cascade, they prevent intestinal scar-forming cells from proliferating in response to inflammatory bowel disease, helping to reduce the risks of dangerous narrowing of the intestine.32 The anti-inflammatory power of tocotrienols even benefits the skin, which undergoes severe oxidative stress following exposure to UV rays in sunlight.33,34
By suppressing oxidative stress and related NF-kB-related inflammation, tocotrienols prevent the cognitive decline associated with diabetes in laboratory animals.35,36 This effect is powerful enough even to prevent chronic alcohol-induced cognitive losses in rat studies.37

Anti-Cancer Mechanisms

Tocotrienols, particularly gamma-tocotrienol, have been linked to anti-cancer actions, primarily through their antioxidant and anti-inflammatory effects.38,39 In 2010 alone, scientists from prestigious institutions such as the MD Anderson Cancer Center and the National Institute on Aging have contributed to a number of new discoveries about tocotrienols and cancer.
Metabolic Syndrome
These discoveries reveal the unique actions of tocotrienols on regulatory proteins such as NF-kB, on DNA-repair proteins, and on intracellular signaling systems, all of which contribute to cancer development.40-43 Gamma-tocotrienol, for example, controls expression of cell regulatory and detoxifying proteins in breast cancer cells, suppressing proliferation and preventing progression of nascent cancers.44
Even if a cancer does get started at a microscopic level, tocotrienols can snuff it out by triggering its cells to commit suicide through activation of the aptly named cellular death receptors.45 And in the event of actual tumor development, tocotrienols sensitize cancerous cells to chemotherapy drugs, potentially reducing their required doses and side effects.38,46 Intriguingly, gamma-tocotrienol has been found to target a unique population of cells in prostate tumors.47 These so-called cancer stem cells are unaffected by conventional cancer therapies, thereby accounting for many cases of treatment-resistant cancers and relapses.
Tocotrienols also show promise in protecting against the potentially cancer-inducing effects of radiation. While radiation is a cornerstone of modern cancer treatment, it can also increase an individual’s future risk of leukemia and other cancers.48 A pre-clinical study showed that gamma-tocotrienol protected mice against the depletion of blood-forming cells that typically occurs in response to full-body radiation exposure.49 These preliminary findings offer hope that tocotrienols could offer protection against the adverse effects of medical, environmental, and occupational radiation exposures.
What Are Triglycerides?
Triglycerides are the form in which most fat exists within the body. Triglycerides in the blood are derived from fats eaten in foods or are made in the body from other sources like carbohydrates.
Triglycerides can accumulate on the walls of arteries and contribute to the buildup of atherosclerotic plaque. Elevated blood triglycerides are involved in the deadly metabolic syndrome that predisposes individuals to type 2 diabetes and its related vascular complications.50
Triglycerides are the major constituent of belly fat. Excess blood triglycerides induce an accumulation of undesirable body fat (especially in the visceral abdominal region). Abdominal obesity is a major risk factor for heart attack, stroke, dementia, and a host of chronic inflammatory diseases.51-53
The American Heart Association website says that triglyceride levels up to 149 mg/dL are safe, but Life Extension has long maintained that optimal fasting triglycerides are under 100 mg/dL of blood. More recent evidence suggests that fasting triglycerides should be even lower.54
Two years ago, Life Extension reduced the recommendation for optimal fasting triglyceride levels to under 80 mg/dL of blood. We know that achieving this lower level will be challenging to certain individuals, especially those suffering from obesity, type 2 diabetes, and/or metabolic syndrome. Fortunately, nutrients (like fish oil) and drugs (like metformin) can dramatically slash triglyceride blood levels.
With new evidence showing that certain tocotrienol fractions can lower triglycerides by 28%, those with stubbornly high triglycerides have a new weapon to reduce this deadly blood fat.
The Male and Female Blood Tests include a measurement of triglycerides in your blood. Until June 6, 2011, Life Extension members can obtain these comprehensive blood test panels for only $199 by calling 1-800-208-3444 (24 hours).

Summary

A 2010 study revealed that tocotrienols slash levels of triglycerides by 28% in humans, while supportive research suggests they also mitigate other cofactors implicated in metabolic syndrome. Their multi-targeted anti-inflammatory effects are being recognized as factors in their ability to combat common age-related disorders.
If you have any questions on the scientific content of this article, please call a Life Extension® Health Advisor at
1-866-864-3027.
References
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