The influence of physical activity on ghrelin and IGF-1/IGFBP-3 levels in children and adolescents with type 1 diabetes mellitus.
OBJECTIVE
The aim of the study was to determine the influence of regular physical activity on ghrelin and IGF-1/IGFBP-3 levels during a diabetes camp.


METHODS
Twenty-eight children and adolescents (14 boys; mean age 12.1 yr) with type 1 diabetes mellitus (T1DM, mean duration of diabetes 4.8 yr) attending a 2-wk diabetes camp that features increased regular physical activities have been studied. Serum levels of ghrelin (total and acylated), growth hormone (GH), insulin-like growth factor-1 (IGF-1), insulin-like growth factor-bindng protein-3 (IGFBP-3) and insulin were measured in fasting state on day 1 and day 14. Improvement of metabolic control was documented by haemoglobin A1c (HbA1c). Glucose levels and insulin doses were determined daily.


RESULTS
Mean insulin dosage decreased from 0.87 to 0.78 U/kg/d, mean HbA1c levels decreased from 8.6 to 8.3%, but the changes were not statistical. There was a significant decline in total ghrelin. IGFBP-3 and IGF-1 decreased also significantly. Total basal ghrelin was inversely related to the change in IGFBP-3.


CONCLUSIONS
We hypothesize an association between ghrelin and metabolic control in T1DM. Higher ghrelin levels might be associated with poor metabolic control. The dynamic of IGFBP-3 levels appears to be under the influence of basal ghrelin concentrations in T1DM.
Department of Paediatrics, Medical University of Graz, Graz, Austria. julia.huber@medunigraz.at
Julia
J
Huber
Elke Elisabeth
EE
Fröhlich-Reiterer
Karl
K
Sudi
Elisabeth
E
Suppan
Gudrun
G
Weinhandl
Hildegard
H
Jasser-Nitsche
Reingard
R
Aigner
Martin Helmuth
MH
Borkenstein
D000293:Adolescent; D002648:Child; D005260:Female; D054439:Ghrelin / Q000097:blood*; D006442:Glycated Hemoglobin / Q000378:metabolism; D019382:Human Growth Hormone / Q000097:blood; D006801:Humans; D007328:Insulin / Q000097:blood; D018972:Insulin-Like Growth Factor Binding Protein 3 / Q000097:blood*; D007334:Insulin-Like Growth Factor I / Q000378:metabolism*; D008297:Male; D009043:Motor Activity / Q000502:physiology*
D054439:Ghrelin; D006442:Glycated Hemoglobin; D019382:Human Growth Hormone; D007328:Insulin; D018972:Insulin-Like Growth Factor Binding Protein 3; D007334:Insulin-Like Growth Factor I