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Ghrelin--an indicator for fat oxidation in obese children and adolescents during a weight reduction program.
J. Pediatr. Endocrinol. Metab. 20, 719-723 (2007)
The aim of this study was to investigate the effect of short-term energy restriction combined with physical activity on changes in substrate oxidation and changes in plasma concentrations of ghrelin. We designed a longitudinal intervention study of 4.2 MJ (= 1,000 kcal) daily with exercise. Eighteen obese children and adolescents (age: 13.1 +/- 1.6 years, 13 girls, 5 boys, 17 White, 1 Black) participated. We measured body mass index (BMI), plasma ghrelin, resting energy expenditure (REE), VCO2, VO2 and respiratory quotient (RQ) at baseline and after 10 days. There was a significant decrease of BMI during the 10 day program (28.6 +/- 4.3 vs 27.5 +/- 4.2; p < 0.001). Ghrelin and RQ showed a tendency to increase, but the difference did not reach significance (ghrelin: 83.4 +/- 37.1 vs 99.5 +/- 41.2, p = 0067; RQ: 0.83 +/- 0.06 vs 0.85 +/- 0.08, p = 0.433). The changes in RQ were significantly and independently correlated with the changes in plasma ghrelin (p = 0.029). The increase in RQ suggests a shift from fat oxidation towards carbohydrate oxidation. Ghrelin reflects the same sensitivity as RQ to changes in energy balance. Therefore, ghrelin seems to be a sensitive indicator for changes in substrate oxidation.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Sprache
Veröffentlichungsjahr
2007
HGF-Berichtsjahr
2007
ISSN (print) / ISBN
0334-018X
e-ISSN
2191-0251
Quellenangaben
Band: 20,
Heft: 6,
Seiten: 719-723
Verlag
de Gruyter
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Diabetes and Obesity (IDO)
PubMed ID
17663297
Erfassungsdatum
2020-02-24