Restricted accessResearch articleFirst published online 2011-4
Moderate Global Reduction in Maternal Nutrition Has Differential Stage of Gestation Specific Effects on β1- and β2-Adrenergic Receptors in the Fetal Baboon Liver
Hepatic β-adrenergic receptors (β-ARs) play a pivotal role in mobilization of reserves via gluconeogenesis and glycogenolysis to supply the animal with its energy needs during decreased nutrient availability. Using a unique nutrient-deprived baboon model, we have demonstrated for the first time that immunoreactive hepatic β1- and β2-AR subtypes are regionally distributed and localized on cells around the central lobular vein in 0.5 and 0.9 gestation (G) fetuses of ad libitum fed control (CTR) and maternal nutrient restricted (MNR) mothers. Furthermore, MNR decreased fetal liver immunoreactive β1-AR and increased immunoreactive β2-AR at 0.5G. However, at 0.9G, immunohistochemistry and Western blot analysis revealed a decrease in β1-AR and no change in β2-AR levels. Thus, MNR in a nonhuman primate species has effects on hepatic β1- and β2-ARs that are receptor- and gestation stage-specific and may represent compensatory systems whose effects would increase glucose availability in the presence of nutrient deprivation.
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