Endothelial function in healthy 11-year-old children after dietary intervention with onset in infancy: the Special Turku Coronary Risk Factor Intervention Project for children (STRIP).
BACKGROUND
Early childhood introduction of nutritional habits aimed at atherosclerosis prevention reduces children's serum total cholesterol concentration, but its effect on vascular endothelial function is unknown.


RESULTS
Between 1990 and 1992, we randomized healthy 7-month-old infants (n=1062) to intervention (low-saturated-fat diet) and control (unrestricted diet) groups. At the age of 11 years, endothelium-dependent (flow-mediated) and endothelium-independent (nitrate-mediated) vasodilatory responses of the brachial artery were measured with high-resolution ultrasound in 179 intervention and 190 control children. The effect of intervention on endothelial function was significant in boys (P=0.0034) but not in girls (P=0.69). The maximum endothelium-dependent dilation response (mean+/-SD) was 9.62+/-3.53% and 8.36+/-3.85% in intervention boys and control boys and 8.84+/-4.00% and 8.44+/-3.60% in intervention girls and control girls, respectively. Intervention had no effect on nitrate-mediated dilation. The difference in endothelial function in boys remained significant after adjustment for current serum total or LDL cholesterol but became nonsignificant after adjustment for mean cholesterol measured under 3 years of age (adjusted means: 9.46% [CI 8.68% to 10.24%] versus 8.54% [CI 7.75% to 9.32%], P=0.11).


CONCLUSIONS
A low-saturated-fat diet introduced in infancy and maintained during the first decade of life is associated with enhanced endothelial function in boys. The effect is explained in part by the diet-induced reduction in serum cholesterol concentration.
Raitakari
Olli T
OT
Department of Clinical Physiology, University of Turku, Turku, Finland. olli.raitakari@utu.fi
Rönnemaa
Tapani
T
Järvisalo
Mikko J
MJ
Kaitosaari
Tuuli
T
Volanen
Iina
I
Kallio
Katariina
K
Lagström
Hanna
H
Jokinen
Eero
E
Niinikoski
Harri
H
Viikari
Jorma S A
JS
Simell
Olli
O
D050197:Atherosclerosis / Q000517:prevention & control; D001916:Brachial Artery / Q000000981:diagnostic imaging; D002648:Child; D002664:Child Nutritional Physiological Phenomena; D002784:Cholesterol / Q000097:blood; D018752:Diet, Fat-Restricted; D004041:Dietary Fats / Q000494:pharmacology; D004730:Endothelium, Vascular / Q000502:physiology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012737:Sex Factors; D014463:Ultrasonography; D014664:Vasodilation
D004041:Dietary Fats; D002784:Cholesterol