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Prenatally undernourished rats show increased preference for wheel running v. lever pressing for food in a choice task

Published online by Cambridge University Press:  02 September 2008

Jennifer L. Miles
Affiliation:
National Research Centre for Growth and Development, Auckland, New Zealand Liggins Institute, The University of Auckland, Private Bag 92019, Auckland, New Zealand
Jason Landon
Affiliation:
National Research Centre for Growth and Development, Auckland, New Zealand School of Psychology, Auckland University of Technology, Auckland, New Zealand
Michael Davison
Affiliation:
National Research Centre for Growth and Development, Auckland, New Zealand Department of Psychology, Faculty of Science, The University of Auckland, Auckland, New Zealand
Christian U. Krägeloh
Affiliation:
National Research Centre for Growth and Development, Auckland, New Zealand School of Psychology, Auckland University of Technology, Auckland, New Zealand
Nichola M. Thompson
Affiliation:
National Research Centre for Growth and Development, Auckland, New Zealand Department of Surgery, Faculty of Medicine and Health Sciences, The University of Auckland, Auckland, New Zealand
Christopher M. Triggs
Affiliation:
Department of Statistics, Faculty of Science, The University of Auckland, Auckland, New Zealand
Bernhard H. Breier*
Affiliation:
National Research Centre for Growth and Development, Auckland, New Zealand Liggins Institute, The University of Auckland, Private Bag 92019, Auckland, New Zealand
*
*Corresponding author: Dr Bernhard Breier, fax +649 3737497, email bh.breier@auckland.ac.nz
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Abstract

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Maternal nutrition during pregnancy has a significant influence in establishing patterns of metabolism and postnatal behaviours in offspring, and therefore shapes their risk of developing disorders in later life. Although it is well established that a mismatch between food consumption and energy expenditure leads to obesity and metabolic dysregulation, little research has investigated the biological origin of such behaviour. We conducted the present experiments to investigate effects of early-life nutrition on preference between wheel running and lever pressing for food during adult life. To address this issue we employed a well-established experimental approach in the rat which has shown that offspring of mothers undernourished during pregnancy develop obesity and metabolic disorders when kept under standard laboratory conditions. Using this experimental approach, two studies were conducted where offspring of ad libitum-fed dams and dams undernourished throughout pregnancy were given the choice between wheel running and pressing a response lever for food. Across subsequent conditions, the rate at which the response lever provided food was varied from 0·22 to 6·0 (study 1) and 0·19 to 3·0 (study 2) pellets per min. Compared with the control group, offspring from dams undernourished during pregnancy showed a consistently greater preference for running over lever pressing for food throughout both experiments of the study. The results of the present study provide experimental evidence that a mother's nutrition during pregnancy can result in a long-term shift in her offspring's lifestyle choices that are relevant to obesity prevention. Such a shift, if endorsed, will have substantial and wide-ranging health consequences throughout the lifespan.

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Full Papers
Copyright
Copyright © The Authors 2008

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