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Cardiovascular phenotype of young adults and angiotensinogen alleles.

Abstract：

OBJECTIVES AND DESIGN:Angiotensinogen (AGT) gene variants influence angiotensinogen plasma levels in children and young adults. The angiotensinogen promoter (-6)A variant facilitates gene transcription in human tissues and it has been associated with high blood pressure in older adults. A young adult population can be used as a model to study genotype/phenotype associations between AGT (-6) variants and cardiovascular variables. METHODS AND RESULTS:Anthropometric measurements, blood pressure and heart rate were taken in 422 white Caucasian students (mean age 23.5 years, SD 2.5 years). Family history for hypertension, physical activity and smoking history were evaluated. Left ventricular variables were measured by echocardiography. Carotid artery wall intimal-media thickness (IMT) was measured by high resolution sonography and digitalized morphometry. The AGT G(-6)A alleles were evaluated by mutagenically separated polymerase chain reaction controlled by direct sequencing. No significant associations were found between angiotensinogen genotype and blood pressure, cardiac variables [except for deceleration time in females which increased with the number of (-6)A alleles] and IMT. Allele frequencies were similar between the first and third tertile of blood pressure and left ventricular mass, and were also similar between negative or positive family history for hypertension (the last group having significantly higher systolic blood pressure in males, P = 0.04 and diastolic blood pressure in females, P < 0.01). Moreover, no relevant interaction on the cardiovascular variables was found between AGT genotype and body mass index. CONCLUSIONS:The angiotensinogen G(-6)A variants do not affect cardiovascular parameters in young adults, but an effect of this polymorphism on cardiovascular phenotype (and hypertension) in older adults cannot be excluded. Additional factors, associated with ageing, should be present to unleash the supposed unfavourable potential of the (-6)A angiotensinogen variant.

journal_name

J Hypertens

journal_title

Journal of hypertension

authors

Sarzani R,Dessì-Fulgheri P,Mazzara D,Catalini R,Cola G,Bersigotti G,Siragusa N,Salvi F,Ercolani P,Spagnolo D,Zingaretti O,Serenelli M,Pupita M,Magni CM,Giantomassi L,Pasquini R,Gesuita R,Carle F,Rappelli A

doi

10.1097/00004872-200112000-00009

subject

Has Abstract

pub_date

2001-12-01 00:00:00

pages

2171-8

issue

eissn

0263-6352

issn

1473-5598

journal_volume

pub_type

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Cardiovascular phenotype of young adults and angiotensinogen alleles.