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    Insulin sensitivity is normalized in the third generation (F3) offspring of developmentally programmed insulin resistant (F2) rats fed an energy-restricted diet

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    Author
    Benyshek, Daniel
    Johnston, Carol
    Martin, John
    Ross, William
    Affiliation
    Department of Anthropology, University of Nevada Las Vegas, 4505 Maryland, Parkway, Box 455003, Las Vegas, NV 89154-5003, USA
    Department of Nutrition, Arizona State University, Mesa, AZ, USA
    School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA
    College of Medicine, University of Arizona, Tucson, AZ, USA
    Issue Date
    2008
    
    Metadata
    Show full item record
    Publisher
    BioMed Central
    Citation
    Nutrition & Metabolism 2008, 5:26 doi:10.1186/1743-7075-5-26
    Journal
    Nutrition & Metabolism
    Rights
    © 2008 Benyshek et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0)
    Collection Information
    This item is part of the UA Faculty Publications collection. For more information this item or other items in the UA Campus Repository, contact the University of Arizona Libraries at repository@u.library.arizona.edu.
    Abstract
    BACKGROUND/AIMS:The offspring and grandoffspring of female rats fed low protein diets during pregnancy and lactation, but fed nutritionally adequate diets thereafter, have been shown to exhibit altered insulin sensitivity in adulthood. The current study investigates the insulin sensitivity of the offspring and grandoffspring of female rats fed low protein diets during pregnancy, and then maintained on energy-restricted diets post weaning over three generations.METHODS:Female Sprague Dawley rats (F0) were mated with control males and protein malnourished during pregnancy/lactation. F1 offspring were then weaned to adequate but energy-restricted diets into adulthood. F1 dams were fed energy-restricted diets throughout pregnancy/lactation. F2 offspring were also fed energy-restricted diets post weaning. F2 pregnant dams were maintained as described above. Their F3 offspring were split into two groups
    one was maintained on the energy-restricted diet, the other was maintained on an adequate diet consumed ad libitum post weaning.RESULTS:F2 animals fed energy-restricted diets were insulin resistant (p < 0.05), while the insulin sensitivity of their F3 offspring equaled and surpassed that of controls on both the energy-restricted and adequate ad libitum postweaning diets (p < 0.05).CONCLUSION:Maternal energy-restriction did not consistently program reduced insulin sensitivity in offspring over three consecutive generations. The reasons for this remain unclear. It is possible that the intergenerational transmission of developmentally programmed insulin resistance is determined in part by the relative insulin sensitivity of the mother during pregnancy/lactation.
    EISSN
    1743-7075
    DOI
    10.1186/1743-7075-5-26
    Version
    Final published version
    Additional Links
    http://www.nutritionandmetabolism.com/content/5/1/26
    ae974a485f413a2113503eed53cd6c53
    10.1186/1743-7075-5-26
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    UA Faculty Publications

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