Pediatric Highlight
International Journal of Obesity (2006) 30, 1476–1481. doi:10.1038/sj.ijo.0803393; published online 16 May 2006
Pancreatic polypeptide in obese children before and after weight loss
T Reinehr1, P J Enriori2, K Harz3, M A Cowley2 and C L Roth3
- 1Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Datteln, Germany
- 2Division of Neurosciences, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, USA
- 3Department of Pediatrics, University of Bonn, Bonn, Germany
Correspondence: Dr T Reinehr, Vestische Hospital for Children and Adolescents Datteln, University of Witten/Herdecke, Vestische Kinderklinik, Dr F. Steiner Str. 5, Datteln 45711, Germany. E-mail: T.Reinehr@kinderklinik-datteln.de
Received 12 December 2005; Revised 18 February 2006; Accepted 11 April 2006; Published online 16 May 2006.
Abstract
Objective:
Little is known concerning pancreatic polypeptide (PP) in weight loss and in childhood obesity.
Methods:
Fasting PP, leptin and insulin concentrations were determined in 38 obese children and compared with 35 lean children of the same age, gender and pubertal stage. Furthermore, changes of PP concentrations over a 1-year period were analyzed in the obese children participating in a weight loss intervention program.
Results:
Obese children had significantly (P<0.01) lower PP, and higher leptin and insulin levels compared to lean children. In multiple linear regression analysis, PP was significantly negatively correlated to body mass index (P<0.01), but not to leptin, insulin, age, gender and pubertal stage. Changes of PP did not significantly correlate to changes of insulin (r=0.07, P=0.343) and leptin (r=-0.02, P=0.459). The substantial weight loss in 17 children led to a significant (P<0.05) increase in PP and decrease in insulin and leptin. In the 21 children without substantial weight loss, there were no significant changes in PP, insulin and leptin.
Conclusions:
PP concentrations are decreased in obese children and independent of age, gender, pubertal stage, leptin and insulin. The decrease of PP in obese children normalized after weight loss. Therefore, low PP concentrations reflect the overweight status, rather than cause it.
Keywords:
PP, leptin, insulin, children, weight loss
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