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The hypothalamus regulates many aspects of energy homeostasis, adjusting both the drive to eat and the expenditure of energy in response to a wide range of nutritional and other signals. It is becoming clear that various neural circuits operate to different degrees and probably serve specific functions under particular conditions of altered feeding behaviour. This review will discuss this functional...
Studies involving altered energy balance states in rodents have demonstrated that hypothalamic neuropeptide Y (NPY) activity is strongly activated in states of negative energy balance, such as periods of dietary restriction or starvation. However, in cancer cachexia, when there is a significant reduction in body weight as a result of appetite loss, leading to loss in fat and lean tissue mass, there...
We have examined the regulation of the orexigenic neurotransmitter, NPY, in hypothalamic slices of rat brain to discover whether the leptin or melanocortin receptor-4 (MCR-4) agonists, which act as satiety signals, can influence the release of this neurotransmitter. Basal and potassium-stimulated NPY release from hypothalamic slices was not significantly altered by the addition of recombinant murine...
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