Hypertension Research
Online ISSN : 1348-4214
Print ISSN : 0916-9636
ISSN-L : 0916-9636
Association of Polymorphism in the Promoter Region of the Apolipoprotein E Gene with Diastolic Blood Pressure in Normotensive Japanese
Tomohiro KATSUYA, Noriyuki SATO, Takashi ASAI, Masayuki FUKUDA, Shin TAKIUCHI, Yuxiao FU, Rikinaru HANAYAMA, Atsushi MORIGUCHI, Hiromi RAKUGI, Jitsuo HIGAKI, Toshio OGIHARA
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Keywords: genetics, hypertension, lipid metabolism, transcription, association study, restriction fragment length polymorphism
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2000 Volume 23 Issue 3 Pages 271-275

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Abstract

The ε4 allele of apolipoprotein E (APOE) is reported to be a genetic risk factor of atherosclerosis through hyperlipidemia and late-onset Alzheimer's dementia. A recent report showed that a genetic variant (A -491T) in the promoter region of the APOE gene increases the risk of Alzheimer's disease. In the present study, we examined whether these APOE polymorphisms were genetically involved in essential hypertension. Japanese hypertensives (n=180) with a family history of hypertension and normotensive controls (n =195, sex and age matched with hypertensives) were recruited from the outpatients of Osaka University Hospital, and an informed consent to participate in the study was obtained from each person. APOE polymorphisms were determined using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). The frequencies of the A -491 allele in hypertensives and normotensives were 0.98 and 0.97, respectively, and the TT/-491 genotype was not found in either group. No significant differences between hypertensives and normotensives were observed in allele frequencies in either APOE polymorphism; however, the mean diastolic blood pressure in normotensive subjects with AA/-491 was significantly higher than in the subjects with AT/-491 (p<0.01). These results suggest that the presence of the APOE promoter polymorphism is not a major risk factor for hypertension but that it does have some minor effect on basal blood pressure variation. (Hypertens Res 2000; 23: 271-275)

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