Abstract
The concentrations of serum retinol-binding protein (RBP), prealbumin (PA) and vitamin A of Indonesian neonates were compared with those of Japanese neonates. The mean serum concentrations of both PA and vitamin A did not differ significantly in Indonesian and Japanese neonates. Indonesian neonates had significantly higher serum RBP (2.75 +/- 0.87 mg/dl, mean +/- SD) than Japanese neonates (1.65 +/- 0.55 mg/dl, p less than 0.01). The molar ratio of vitamin A:RBP in Indonesian infants was significantly lower than in Japanese infants (p less than 0.02), and this in turn is indicative of increased concentrations of retinol-free RBP in the plasma of Indonesian neonates. The results suggest that RBP metabolism in Indonesian neonates differs from that in Japanese neonates.
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