Affiliation:
1. First Department of Pediatrics, Athens University Medical School, Athens, Greece
2. Department of Clinical Biochemistry, “Aghia Sophia” Children’s Hospital, Athens, Greece
Abstract
Abstract
Background: Peptide YY (PYY) and ghrelin are gastrointestinal tract–derived hormones that play roles in the regulation of food intake and energy balance. Negative energy balance often occurs in hospitalized preterm infants.
Methods: To measure serum concentrations of PYY in preterm and full-term infants and to investigate their correlations with anthropometric characteristics, food intake, and serum ghrelin concentrations, we measured serum PYY and ghrelin concentrations by RIA in 62 healthy preterm infants [mean (SD) gestational age, 32.0 (2.1) weeks; postnatal age, 40.9 (14.8) days] and 15 healthy full-term infants of comparable postnatal age. All of the infants were formula-fed every 3 h.
Results: PYY concentrations were significantly higher in preterm [1126.2 (215.4) ng/L] than in full-term infants [825.3 (234.4) ng/L; P <0.001]. In the entire study population, serum PYY concentrations correlated negatively with gestational age and anthropometric measurements (birth weight, body weight, body length, body mass index, and head circumference) and positively with serum ghrelin concentrations, whereas there was no significant correlation between PYY concentration and caloric intake or weight gain. Multiple regression analysis, after correction for prematurity, revealed that serum PYY concentrations correlated independently with serum ghrelin concentrations and infant body weight or body mass index.
Conclusions: Circulating concentrations of PYY may increase in preterm infants to compensate for the negative body-weight balance. The physiologic mechanisms behind the correlation between PYY and ghrelin remain to be elucidated.
Publisher
Oxford University Press (OUP)
Subject
Biochemistry (medical),Clinical Biochemistry
Reference40 articles.
1. Neary NM, Small CJ, Bloom SR. Gut and mind. Gut2003;52:918-921.
2. Konturek SJ, Konturek JW, Pawlik T, Brzozowki T. Brain-gut axis and its role in the control of food intake. J Physiol Pharmacol2004;55:137-154.
3. Batterham RL, Cowley MA, Small CJ, Herzog H, Cohen MA, Dakin CL, et al. Gut hormone PYY(3–36) physiologically inhibits food intake. Nature2002;418:650-654.
4. Tschop M, Smiley DL, Heiman ML. Ghrelin induces adiposity in rodents. Nature2000;407:908-913.
5. Wren AM, Seal LJ, Cohen MA, Brynes AE, Frost GS, Murphy KG, et al. Ghrelin enhances appetite and increase food intake in humans. J Clin Endocrinol Metab2001;86:5992-5995.
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