Apolipoprotein CII
Apolipoprotein CII (apoCII) is a protein found in large fat particles absorbed from the gastrointestinal tract. It is also found in very low density lipoprotein (VLDL), which is made up of mostly triglycerides.
This article discusses the test used to check for apoCII in a sample of your blood.
How is the Test Performed?
A blood sample is needed. For information on how this is done, see: Venipuncture
Preparation for the Test
You may be told not to eat or drink anything for 4 - 6 hours before the test.
How will the Test Feel?
When the needle is inserted to draw blood, you may feel moderate pain, or only a prick or stinging sensation. Afterward, there may be some throbbing.
Why is the Test Performed?
ApoCII measurements can help to determine the specific type or cause of high blood lipids (hyperlipidemia).
Normal Results for Apolipoprotein CII
The normal range is 3 - 5 mg/dL. However, apo CII is usually reported as present or absent.
Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What Abnormal Results Mean
High levels of apoCII may be due to:
Low apoCII levels are seen in persons with a rare condition called familial apoprotein CII deficiency. This causes chylomicronemia syndrome.
Apolipoprotein CII Risks
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.
Other risks associated with having blood drawn are slight but may include:
- Excessive bleeding
- Fainting or feeling light-headed
- Hematoma (blood accumulating under the skin)
- Infection (a slight risk any time the skin is broken)
Considerations
Apolipoprotein measurements may provide more detail about your risk for heart disease, but the added value of this test beyond a lipid panel is unknown.
References
Genest J, Libby P. Lipoprotein disorders and cardiovascular disease. In: Bonow RO, Mann DL, Zipes DP, Libby P, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 9th ed. Philadelphia, PA:Saunders Elsevier; 2011:chap 47.
Semenkovich, CF. Disorders of lipid metabolism. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 213.
Related Images
Blood test| Review Date: 6/4/2012 Reviewed By: David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc. David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc. |
