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Title: SERUM GROWTH HORMONE-BINDING PROTEINS IN THE HUMAN FETUS AND INFANT
Authors: MASSA, G ×
de Zegher, Francis
VANDERSCHUERENLODEWEYCKX, M #
Issue Date: 1992
Publisher: WILLIAMS & WILKINS
Series Title: Pediatric research vol:32 issue:1 pages:69-72
Conference: date:CATHOLIC UNIV LEUVEN,DEPT PAEDIAT,B-3000 LOUVAIN,BELGIUM
Abstract: Growth hormone-binding protein (GH-BP) levels were studied in cord serum of 69 human infants born after 24 to 41 wk of gestation and in serum of 14 infants aged 1 to 3 mo. GH-BP levels were measured by HPLC-gel filtration of serum incubated overnight with I-125-hGH. The radioactive elution profile revealed two small I-125-hGH peaks of high molecular weight and a large peak, corresponding to monomeric I-125-hGH. The first peak of high molecular weight was variable, showed some of the characteristics (high molecular weight, displaceability by a large excess of unlabeled hGH) of the described low affinity, high capacity GH-BP, and did not correlate with gestational age or birth weight (peak I-BP). The second peak was identified as I-125-hGH bound to the high affinity, low capacity GH-BP (peak II-BP). Mean +/- SD specific binding of I-125-hGH to this peak was significantly (p < 0.0001) different between preterm infants (3.1 +/- 1.1%; n = 51), term infants at birth (4.2 +/- 1.1%; n = 18), and 1- to 3-mo-old infants (8.5 +/- 1.6%; n = 14). To evaluate the effect of intrauterine nutritional state, the ponderal index (weight/length 3) was calculated. Peak II-BP levels were lower (p < 0.05) in infants with the ponderal index < 2.35 (2.8 +/- 1.0%; n = 20) than in those with the ponderal index between 2.35 and 2.65 (3.4 +/- 1.2%; n = 29) or > 2.65 (3.8 +/- 1.2%; n = 20). We conclude that GH-BP are present in human cord serum throughout the 3rd trimester of gestation. The levels of peak II-BP are influenced by fetal age and intrauterine growth and increase quickly after birth.
ISSN: 0031-3998
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Section Newborn (-)
× corresponding author
# (joint) last author

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