Indan Journal of Medical Research Indan Journal of Medical Research Indan Journal of Medical Research Indan Journal of Medical Research
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REVIEW ARTICLE
Year : 2010  |  Volume : 132  |  Issue : 4  |  Page : 363-378

Apolipoprotein E polymorphism in cerebrovascular & coronary heart diseases


Department of Environmental Sciences, Bharathiar University, Coimbatore, India

Correspondence Address:
S Anoop
Department of Environmental Sciences, Bharathiar University, Coimbatore, India

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Source of Support: None, Conflict of Interest: None


PMID: 20966513

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The role of apolipoprotein E (apo E) in lipid metabolism and cholesterol transport is well established. About 14 per cent of the variation in plasma cholesterol levels is attributed to polymorphisms in APO E gene (APO E). APO E consists of three common alleles, designated as ε2, ε3 and ε4 which code for E2, E3 and E4 proteins respectively resulting in three homozygous (E2/E2, E3/E3, E4/E4) and three heterozygous (E3/E2, E4/E2 and E4/E3) phenotypes. Different populations studied worldwide inherit variable frequencies of the APO E alleles and genotypes, with the most frequent allele being ε3.The ε4 allele has been consistently shown to be associated with Alzheimer's disease, coronary heart disease and cerebrovascular disorders. In this review, we have discussed the role of APO E polymorphisms in cerebrovascular and coronary heart diseases. The status of APO E polymorphisms and their disease associations in Asian Indians besides, other populations has also been discussed. Further, studies elucidating the pathophysiology of apo E deficiency conducted in knock-out mice have been reviewed.


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