Abstract:
:The anorexigenic neuropeptide NEFA/nucleobindin 2 (NUCB2)/nesfatin-1-containing neurons are distributed in the brain regions involved in feeding regulation, including the hypothalamic paraventricular nucleus (PVN). Functionally, NUCB2/nesfatin-1 neurons in the PVN regulate feeding through the hypothalamus and brain stem. However, the neural network of PVN NUCB2/nesfatin-1 neurons has yet to be elucidated. Axon collateral branches allow individual neurons to target multiple neurons. In some cases, each target neuron can be located in different nuclei. Here we show that a single neuron in the PVN projects axonal collaterals to both the dorsal vagal complex (DVC) and the arcuate nucleus (ARC), which are important brain regions for feeding regulation. In this study, after injection of different retrograde tracers into the DVC and ARC, both tracer-labeled neurons were detected in the identical PVN neuron, indicating the axon collateral projections from the single PVN neuron to the DVC and ARC. Furthermore, immunohistochemical analysis revealed that approximately 50 % of the neurons with axon collateral projections from the PVN to the DVC and ARC were found to be NUCB2/nesfatin-1 neurons. Our data suggest that a single NUCB2/nesfatin-1 neuron in the PVN projects to both the ARC and the DVC with axon collateral projection. Although the physiological significance remains to be elucidated, our data offer new perspectives on NUCB2/nesfatin-1 function at the neural network level and food intake regulation.
journal_name
Brain Struct Functjournal_title
Brain structure & functionauthors
Maejima Y,Kumamoto K,Takenoshita S,Shimomura Kdoi
10.1007/s00429-015-1150-4subject
Has Abstractpub_date
2016-12-01 00:00:00pages
4723-4731issue
9eissn
1863-2653issn
1863-2661pii
10.1007/s00429-015-1150-4journal_volume
221pub_type
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