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  • Title: Central vs. peripheral effects of estrogen on food intake and lipoprotein lipase activity in ovariectomized rats.
    Author: Palmer K, Gray JM.
    Journal: Physiol Behav; 1986; 37(1):187-9. PubMed ID: 3737718.
    Abstract:
    The effects of implants of estradiol benzoate (EB) into either the ventromedial nucleus (VMH-EB) or the paraventricular nucleus (PVN-EB) of the hypothalamus were compared to the effects of peripheral EB (Per-EB) replacement in ovariectomized rats. After three days of hormone treatment, the Per-EB group and the PVN-EB group exhibited a decrease in food intake and body weight. Adipose tissue lipoprotein lipase activity was generally suppressed for the Per-EB, PVN-EB, and VMH-EB groups in the left and right parametrial and retroperitoneal fat pads. The finding that the VMH-EB and PVN-EB groups experienced similar peripheral stimulation but differed on the food intake and body weight measures would suggest that these measures are not entirely under peripheral control. The findings support the hypothesis that estrogen exerts its effects via multiple mechanisms, both central and peripheral. In addition, the PVN is shown to be an important site for further research on the modulation of feeding and metabolism by estrogen.
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