The Common Polymorphism of Apolipoprotein E:Geographical Aspects and New PathophysiologicalRelations

Verfasser / Beitragende:
[Lars Ulrik Gerdes]
Ort, Verlag, Jahr:
2003
Enthalten in:
Clinical Chemistry and Laboratory Medicine, 41/5(2003-05-15), 628-631
Format:
Artikel (online)
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100 1 |a Gerdes  |D Lars Ulrik 
245 1 4 |a The Common Polymorphism of Apolipoprotein E:Geographical Aspects and New PathophysiologicalRelations  |h [Elektronische Daten]  |c [Lars Ulrik Gerdes] 
520 3 |a Apolipoprotein E (apoE) has important functions in systemic and local lipid transport, but also has other functions. The gene (APOE) shows a common polymorphism with three alleles - APOE*2, APOE*3, and APOE*4. Their frequencies vary substantially around the world, but APOE*3 is the most common almost everywhere and is often considered to be the ancestral or "wild-type” allele for that reason. However, there are several arguments for APOE*4 being the ancestral allele. But then, why has APOE*3 become so frequent? And why has APOE*4 not become extinct? The proportion of APOE*4 carriers increases from only 10-15% in southern Europe to 40-50% in the north. The gradient may be a trace of the demic expansion of agriculture that began about 10,000 years ago, but it may also reflect the possibility that APOE*4 carriers are less likely to develop vitamin D deficiency. The common APOE polymorphism is associated with varying risk of cardiovascular disease and Alzheimer's disease, but other interesting aspects may emerge in the future. 
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