Heart 1997;78:396-398 ( October )
An association between arterial pulse pressure and variation in the fibrillin-1 gene
a Cardiovascular and Pulmonary Research
Division, Charing Cross and Westminster Medical School, Fulham Palace
Road, London W6 8RF, UK, b Division of Cardiovascular Genetics, Rayne Institute,
UCL Medical School, London WC1, UK, c Wolfson Institute of Preventative Medicine, The
Medical College of St Bartholomew's Hospital, Charterhouse Square,
London EC1, UK
Correspondence to: Dr Powell.
Accepted for publication 24 June 1997
Objective
To investigate whether variation in the
fibrillin-1 gene was associated with blood pressure in healthy middle
aged men, as had been observed in patients with abdominal aortic aneurysm.
Design, setting, and patients
Middle aged men (n = 245), aged 50 to 61 years, were recruited from one of the nine general
practices participating in the second Northwick Park heart study. Blood
samples were obtained for the preparation of genomic DNA and analysis
of plasma variables.
Main outcome measures
Systolic, diastolic, and
pulse pressures; fibrillin-1 genotype characterised with a four allele
variable tandem nucleotide repeat polymorphism in intron 28.
Results
In healthy middle aged men only three
common genotypes were observed: 2-2 (frequency 54.1%), 2-3 (16%), and
2-4 (15%). The mean arterial systolic (and pulse) pressure varied
according to fibrillin-1 genotype: 2-4 genotype, 126.3 (47.6) mm Hg;
2-2 genotype, 131.0 (51.3) mm Hg; and 2-3 genotype, 135.5 (54.2) mm Hg.
The median pulse pressure was 50 mm Hg. Distribution of men around the
median pulse pressure, according to genotype, showed a significant trend for patients of 2-4 genotype to have the lowest pulse pressures, those of 2-2 genotype to have intermediate pressures, and those of 2-3 genotype to have the highest pulse pressures (p = 0.003 for healthy men).
Conclusions
There appears to be a
significant association between fibrillin-1 genotype and arterial pulse
pressure in men aged 50 to 61 years.
© 1997 by Heart
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