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Energy balance of pregnant diabetic rats

Published online by Cambridge University Press:  09 March 2007

Ruth Yamada ,
Mauro A. Griggio  and
Jacqueline Luz
Ruth Yamada
Affiliation:
Federal University of São Paulo – São Paulo Medical School (UNIFESP) Department of Physiology, São Paulo, Brazil
Mauro A. Griggio
Affiliation:
Federal University of São Paulo – São Paulo Medical School (UNIFESP) Department of Physiology, São Paulo, Brazil
Jacqueline Luz*
Affiliation:
Federal University of São Paulo – São Paulo Medical School (UNIFESP) Department of Physiology, São Paulo, Brazil
*
*Corresponding author: Dr Jacqueline Luz, fax +55 11 5575 9165, email [email protected]
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Abstract

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Pregnancy and diabetes lead to metabolic alterations in the energy balance that may not be completely independent. The objective of the present study was to look at the alterations induced by type 1 diabetes mellitus on the energy balance of pregnant rats and the offspring. Diabetes was induced by streptozotocin injection 15 d before the starting of pregnancy. The rats had their energy balance variables followed for 21 d. Protein, fat and energy content of dams was determined from samples of the carcasses. Pregnancy led to increased energy intake, energy gain and energy expenditure as well as higher gross food efficiency than non-pregnant counterparts. Diabetes increased metabolizable energy intake but not the energy gain of the animals: they had very high energy expenditure, so that diabetes blocked the improvement in gross food efficiency shown during pregnancy. Offspring from diabetic dams were born with lower body weight. Pregnant animals did not present the usual energy storage as seen by lower energy gain of diabetic dams as well as by the lower fat content in the carcasses of pregnant diabetic rats. It is concluded that diabetes impairs the energy variables usually enhanced by pregnancy alone.

Keywords

Energy balanceDiabetes mellitusPregnancyEnergy expenditure
Type
Research Article
Information
British Journal of Nutrition , Volume 87 , Issue 5 , May 2002 , pp. 509 - 515
Copyright
Copyright © The Nutrition Society 2002

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