Lipoprotein(a) is a type of cholesterol we all have; however, it's not a cholesterol routinely monitored by physicians. Typically you receive a standard lipid panel which gives you the following labs:
Triglycerides (and maybe VLDL Cholesterol)
If the above labs are within normal, there is usually no reason a physician would order any further tests. For those of you with a strong family history of heart disease, I encourage you to have your physician do routine tests beyond this standard lipid panel. You need to have a comprehensive lipid panel. A comprehensive lipid panel tests you for the following labs:
C-Reactive Protein (measure of inflammation)
Dense LDL III
Dense LDL IV
Buoyant HDL 2b
Now, several of these labs you're probably not familiar with and at some point I'll tell you more about them, but right now I want to focus on lipoprotein(a).
Lipoprotein(a) is formed when one LDL molecule is attached to a protein called apolipoprotein(a). (FYI: Lipo = fat; hence the name lipoprotein - fat with protein.) A healthy level of lipoprotein(a) is beneficial and will:
Repair damaged cells
Restore structure of blood vessel walls
Enhance blood clotting
Prevent excessive blood loss due to damaged vessels
Promote cell regeneration
Basically, lipoprotein(a) at healthy levels acts as an "artery patch".
On the flip side, elevated lipoprotein(a) causes problems. If your vessel walls are damaged, the body produces more lipoprotein(a) to repair vessel walls. Too much lipoprotein(a) concentrates at damage locations along your artery walls, binds with two amino acids resulting in LDL cholesterol being dumped at the "site" and oxidized LDL is deposited in the artery wall which escalates the build-up of plaque. As the plaque forms, lipoprotein(a) encourages the formation of a blood clot on top of the plaque. All of this acts to narrow the blood vessel and impedes blood flow.
One reason for elevated lipoprotein(a) levels is atherosclerosis (hardening of the arteries) and constant arterial wall damage causing the body to produce excess lipoprotein(a) in an attempt to repair the damage. Another reason for high lipoprotein(a) levels is genetics. Even if you do not have signs of heart disease, meaning your blood pressure and cholesterol levels are normal, you may still have elevated lipoprotein(a) due to genetics.
Lipoprotein(a) levels are not affected by the foods you eat or your activity level. There are no prescription medications, including statin drugs, that have an impact on reducing levels. That doesn't mean you don't have options if you live with an elevated lipoprotein(a). Using supplements, such as omega 3's, niacin, and vitamin C are three options for reducing lipoprotein(a).
It's not necessarily beneficial for everyone to have a comprehensive lipid panel, but if you have heart disease (high cholesterol, high blood pressure, etc.) or you have a strong family history of heart disease, it's in your best interest to get a comprehensive lipid panel. What you don't know just might hurt you!
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Published On: June 25, 2009