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Norepinephrine Injection into the Paraventricular Nucleus Induces a Reduced Modification of Eating Behavior and
M Monda1, R Sperandeo1, A Viggiano1
1a Department of Human Physiology and Integrated Biological Functions "F. Bottazzi" , Second University of Naples , Via Costantinopoli 16, I-80138, Naples , Italy.
Nutritional Neuroscience
|July 15, 2016
Summary
Vasopressin influences feeding behavior and thermogenesis. Norepinephrine injection into the hypothalamus altered food intake and energy expenditure differently in rats with and without vasopressin.
Area of Science:
- Neuroendocrinology
- Behavioral Neuroscience
- Metabolic Regulation
Background:
- Vasopressin is a key neuropeptide in the hypothalamus.
- Norepinephrine (NE) in the paraventricular nucleus (PVN) influences feeding and thermogenesis.
- The precise role of vasopressin in NE-mediated metabolic responses remains unclear.
Purpose of the Study:
- To investigate the role of vasopressin in modulating eating behavior and thermogenesis.
- To determine how vasopressin affects responses to norepinephrine (NE) in the hypothalamic paraventricular nucleus (PVN).
Main Methods:
- Rats with and without vasopressin were used.
- Nutrient intake, brown adipose tissue temperature, and oxygen consumption were measured.
- Norepinephrine or saline was injected into the hypothalamic PVN.
Main Results:
- In vasopressin-containing rats, NE increased intake of carbohydrates, lipids, and total calories, while decreasing brown adipose tissue temperature and oxygen consumption.
- In vasopressin-deficient rats, NE decreased carbohydrate intake but increased lipid consumption.
- NE injection altered thermogenesis and oxygen consumption differently based on vasopressin presence.
Conclusions:
- Vasopressin plays a significant role in mediating the effects of hypothalamic NE on feeding behavior.
- Vasopressin is involved in regulating NE-induced thermogenesis and energy expenditure.
- These findings highlight vasopressin's importance in the neuroendocrine control of metabolism.
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