COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, N.I.H., EXTRAMURAL
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Estrogen receptor-alpha variants are associated with lipoprotein size distribution and particle levels in women: the Framingham Heart Study.

Atherosclerosis 2006 March
Plasma lipid profile is affected by endogenous estrogen levels and hormone replacement therapy (HRT). As plasma lipid concentrations have a significant heritable basis and the effects of both endogenous estrogen and use of HRT are mediated by estrogen receptors, we sought to investigate the relationships between polymorphisms in estrogen receptor-alpha (ESR1) and plasma lipid and lipoprotein concentrations. We analyzed data from 854 women (mean age 52+/-10 years) from the Framingham Heart Study. A TA repeat in the promoter region, c.30T>C in exon 1, c.454-397T>C, and c.454-351A>G in intron 1, all in linkage disequilibrium (LD), were significantly associated with low-density lipoprotein (LDL) particle size and concentration of small LDL particles. Women with the c.454-397C allele had larger LDL particle size (21.09+/-0.02 nm versus 21.01+/-0.03 nm, p=0.021) concurrent with lower small LDL particle concentration (0.47+/-0.02 mmol/L versus 0.58+/-0.03 mmol/L, p=0.008). Moreover, the TA[L]-c.30C-c.454-397C-c.454-351G haplotype (frequency, 32%) was associated with lower small LDL particle concentrations (-0.06+/-0.03 mmol/L change associated with each copy of this haplotype, p=0.011) when compared to the TA[S]-c.30T-c.454-397T-c.454-351A haplotype (frequency, 46%), where L and S are long and short TA repeats. Our results suggest that common ESR1 polymorphisms have a significant effect on lipoprotein metabolism in women.

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