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The Overlooked Ugly Cholesterol
The risk of ischemic heart disease -- the leading cause of
death worldwide -- is three times higher in persons with high levels of the
so-called 'ugly' cholesterol.
This is the finding of a new study of 73,000 Danes, which is
shedding light on a long debate on this topic.
Cholesterol is divided into ‘the good’ HDL cholesterol, ‘the
bad’ LDL cholesterol and ‘the ugly’ cholesterol
- The High Density Lipoproteins (HDL) essentially remove cholesterol from the blood and carries them back to the liver preventing accumulation of cholesterol in the blood and therefore are referred to as Good cholesterols.
- The Low Density Lipoproteins (LDL), on the other hand do exactly the opposite; they deliver more cholesterol to the body, adding to the process of cholesterol build up in the blood vessels and deposits on the walls. Therefore, called Bad cholesterol
- The Triglycerides (TG), the major component in Very Low Density Lipoproteins (VLDL), gets the tag of being the Ugly cholesterol because VLDL gets converted into LDL in the bloodstream adding to the circulating bad cholesterol
It is the so-called ‘ugly cholesterol’ – also called
‘remnant-like particle cholesterol’ – that is the really bad guy.
"High ugly cholesterol is the result of high blood
levels of normal fat (triglycerides). The most important cause of high ugly
cholesterol is overweight and obesity. Persons with high ugly cholesterol
should therefore be advised to lose weight, but drugs such as statins and
fibrates may also lower levels of ugly cholesterol in the blood," says
Professor Børge Nordestgaard, Chief Physician at Copenhagen
University Hospital
and Clinical Professor at the Faculty of Health and Medical Sciences at University of Copenhagen.
"LDL cholesterol or 'the bad' cholesterol' is of course
bad, but our new study reveals that the ugly cholesterol likewise is the direct
cause of atherosclerosis resulting in ischemic heart disease and early death.
By examining 73,000 persons, we found that an increase in the ugly cholesterol
triples the risk of ischemic heart disease, which is caused by lack of oxygen
to the heart muscle due to narrowing or blocking of the coronary arteries,"
adds Børge Nordestgaard.
"I hope that this new knowledge will lead to better
preventive treatment including lifestyle changes, as more than one in five
individuals in affluent countries suffers from high ugly cholesterol. We also
hope that the pharmaceutical industry will develop new drugs targeted
specifically at raised ugly cholesterol levels," he emphasises.
###
The above story is based on the
January 21, 2013 news release by University of Copenhagen.
The results have just been published in the Journal of the American College of Cardiology:
Anette
Varbo, Marianne Benn, Anne Tybjærg-Hansen, Anders B. Jørgensen, Ruth
Frikke-Schmidt, Børge G. Nordestgaard. Remnant Cholesterol as a Causal Risk
Factor for Ischemic Heart Disease. J Am Coll Cardio, 2012; DOI: 10.1016/j.jacc.2012.08.1026
Omega-3 Fatty Acids Lower Serum Triglycerides
Omega-3 fatty acids has demonstrated an efficacy and safety
in adult patients with high and very high triglycerides adjunct to diet.
This well known effect has been shown to be caused by
decreased very low-density lipoprotein triglyceride secretion rates in kinetic
studies in humans.
An average of four grams of omega-3 fatty acids are
typically used to reduce triglycerides in individuals with high trigylceride
levels*.
Reference:
McKenney JM, Sica D. Prescription omega-3 fatty acids for
the treatment of hypertriglyceridemia. Am J Health Syst Pharm.2007 Mar
15;64(6):595-605.
* The Zestzfulness Team recommends
that individuals taking more than 3 grams a day should be under the supervision
of a health-care provider, since high doses of omega-3 fatty acids decrease the
aggregation of platelets, which may cause bleeding to occur more easily.
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