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- W2072338511 abstract "The lateral hypothalamic area (LHA) participates in the integration of sensory information and somatomotor responses associated with hunger and thirst. Although the LHA is neurochemically heterogeneous, a particularly high number of cells express melanin-concentrating hormone (MCH), which has been reported to play a role in energy homeostasis. Treatment with MCH increases food intake, and MCH mRNA is overexpressed in leptin-deficient (ob/ob) mice. Mice lacking both MCH and leptin present reduced body fat, mainly due to increased resting energy expenditure and locomotor activity. Dense MCH innervation of the cerebral motor cortex (MCx) and the pedunculopontine tegmental nucleus (PPT), both related to motor function, has been reported. Therefore, we postulated that a specific group of MCH neurons project to these areas. To investigate our hypothesis, we injected retrograde tracers into the MCx and the PPT of rats, combined with immunohistochemistry. We found that 25% of the LHA neurons projecting to the PPT were immunoreactive for MCH, and that 75% of the LHA neurons projecting to the MCx also contained MCH. Few MCH neurons were found to send collaterals to both areas. We also found that 15% of the incerto-hypothalamic neurons projecting to the PPT expressed MCH immunoreactivity. Those neurons preferentially innervated the rostral PPT. In addition, we observed that the MCH neurons express glutamic acid decarboxylase mRNA, a gamma-aminobutyric acid (GABA) synthesizing enzyme. We postulate that MCH/GABA neurons are involved in the inhibitory modulation of the innervated areas, decreasing motor activity in states of negative energy balance." @default.
- W2072338511 created "2016-06-24" @default.
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- W2072338511 creator A5081479185 @default.
- W2072338511 creator A5091177547 @default.
- W2072338511 date "2008-03-01" @default.
- W2072338511 modified "2023-10-01" @default.
- W2072338511 title "Melanin-concentrating hormone projections to areas involved in somatomotor responses" @default.
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- W2072338511 doi "https://doi.org/10.1016/j.jchemneu.2007.10.002" @default.
- W2072338511 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18065197" @default.
- W2072338511 hasPublicationYear "2008" @default.
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