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Am J Physiol Regul Integr Comp Physiol 283: R1087-R1093, 2002. First published August 1, 2002; doi:10.1152/ajpregu.00402.2002
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Vol. 283, Issue 5, R1087-R1093, November 2002

Maternal obesity alters adiposity and monoamine function in genetically predisposed offspring

Barry E. Levin and Ambrose A. Dunn-Meynell

Neurology Service, Veterans Affairs Medical Center, East Orange 07018; and Department of Neurosciences, New Jersey Medical School, Newark, New Jersey 07103

The impact of maternal obesity on brain monoamine function in adult offspring of dams selectively bred to express diet-induced obesity (DIO) or diet resistance (DR) was assessed by making dams obese or lean during gestation and lactation. After 12 wk on chow and 4 wk on a 31% fat diet, offspring hypothalamic nucleus size and [3H]nisoxetine binding to norepinephrine transporters (NET) and [3H]paroxetine binding to serotonin transporters (SET) were measured. Offspring of obese DIO dams became more obese than all other groups, but maternal obesity did not alter weight gain in DR offspring (25). Maternal obesity was associated with 10-17% enlargement of ventromedial nuclei (VMN) and dorsomedial nuclei in both DIO and DR offspring. Offspring of obese DIO dams had 25-88% lower NET binding in the paraventricular nuclei (PVN), arcuate nuclei, VMN, and the central amygdalar nuclei, while offspring of obese DR dams had 43-67% higher PVN and 90% lower VMN NET binding and a generalized increase in SET binding across all hypothalamic areas compared with other groups. Thus maternal obesity was associated with alterations in offspring brain monoamine metabolism, which varied as a function of genotype and the development of offspring obesity.

diet-induced obesity; norepinephrine; serotonin; hypothalamus; amygdala; neural plasticity; insulin; leptin


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