ApoE

Apolipoprotein E (ApoE) is a major component of specific lipoproteins called very low-density lipoproteins (VLDL). A major function of VLDLs is to remove excess cholesterol from the blood and carry it to the liver for processing. Maintaining normal levels of cholesterol is essential for the prevention of cardiovascular diseases, including heart attacks and strokes. Apolipoprotein E is a type of lipoprotein. Apolipoprotein E is associated with several cardiovascular disorders. There are three isoforms (slightly different forms) of the ApoE lipoprotein. These three isoforms are known as ApoE2, E3, and E4. ApoE2 seems to be one of several genetic factors that play a part in increased risk of heart attacks and strokes and ApoE4 is a risk factor for coronary artery disease. As well, ApoE4 has been suggested to play a role in type 2 Alzheimer disease.