Ghrelin, insulin sensitivity and postprandial glucose disposal in overweight and obese children

Claudio Maffeis, Riccardo C. Bonadonna, Alessandro Consolaro, Roberto Vettor, Claudia Banzato, Davide Silvagni, Giovanna Bogoni, Maristella Pellegrino, Luciano Tatò

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Objective: To explore the changes of ghrelin circulating levels induced by a mixed meal and their relationship with postprandial substrate oxidation rates in overweight and obese children with different levels of insulin sensitivity. Methods: A group of ten boys (age 9-12 years) with different levels of overweight (standard deviation score of body mass index: 1.6-3.2) was recruited. Body composition was measured by dual-energy X-ray absorptiometry. Insulin sensitivity was assessed by a frequently sampled i.v. glucose tolerance test. Pre-prandial and postprandial (3 h) substrate oxidation was measured by indirect calorimetry. The energy content of the test meal (16% protein, 36% carbohydrate and 48% fat) was 40% of pre-prandial energy expenditure (kJ/day). Results: Pre-prandial serum concentration of total ghrelin was 701.4±66.9 pg/ml (S.E.M.). The test meal induced a rapid decrease in ghrelin levels and maximal decrease was 27.3±2.7% below baseline. Meal intake induced a progressive increase of the carbohydrate oxidation rate for 45 min after food ingestion, followed by a slow decrease without returning to pre-prandial values. Postprandial cumulative carbohydrate oxidation was 16.9±0.8 g/3 h. Insulin sensitivity and postprandial maximal decrease of ghrelin concentration showed a significant correlation (r = 0.803, P <0.01). Moreover, the postprandial carbohydrate oxidation rate correlated with the area under the curve for both insulin (r = 0.673, P <0.03) and ghrelin (r = -0.661, P <0.04). Conclusions: A relevant association between postprandial insulin-mediated glucose metabolism and ghrelin secretion in children with different levels of overweight was found. It is possible that the maintenance of an adequate level of insulin sensitivity and glucose oxidation may affect appetite regulation by favoring a more efficient postprandial ghrelin reduction.

Original languageEnglish
Pages (from-to)61-68
Number of pages8
JournalEuropean Journal of Endocrinology
Volume154
Issue number1
DOIs
Publication statusPublished - Jan 2006

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Ghrelin
Meals
Insulin Resistance
Glucose
Carbohydrates
Insulin
Appetite Regulation
Indirect Calorimetry
Photon Absorptiometry
Glucose Tolerance Test
Body Composition
Energy Metabolism
Area Under Curve
Body Mass Index
Eating
Fats
Food
Serum

ASJC Scopus subject areas

  • Endocrinology

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Ghrelin, insulin sensitivity and postprandial glucose disposal in overweight and obese children. / Maffeis, Claudio; Bonadonna, Riccardo C.; Consolaro, Alessandro; Vettor, Roberto; Banzato, Claudia; Silvagni, Davide; Bogoni, Giovanna; Pellegrino, Maristella; Tatò, Luciano.

In: European Journal of Endocrinology, Vol. 154, No. 1, 01.2006, p. 61-68.

Research output: Contribution to journalArticle

Maffeis, C, Bonadonna, RC, Consolaro, A, Vettor, R, Banzato, C, Silvagni, D, Bogoni, G, Pellegrino, M & Tatò, L 2006, 'Ghrelin, insulin sensitivity and postprandial glucose disposal in overweight and obese children', European Journal of Endocrinology, vol. 154, no. 1, pp. 61-68. https://doi.org/10.1530/eje.1.02055
Maffeis, Claudio ; Bonadonna, Riccardo C. ; Consolaro, Alessandro ; Vettor, Roberto ; Banzato, Claudia ; Silvagni, Davide ; Bogoni, Giovanna ; Pellegrino, Maristella ; Tatò, Luciano. / Ghrelin, insulin sensitivity and postprandial glucose disposal in overweight and obese children. In: European Journal of Endocrinology. 2006 ; Vol. 154, No. 1. pp. 61-68.
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AU - Vettor, Roberto

AU - Banzato, Claudia

AU - Silvagni, Davide

AU - Bogoni, Giovanna

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