Awake dynamics and brain-wide direct inputs of hypothalamic MCH and orexin networks.

González, J Antonio; Iordanidou, Panagiota; Strom, Molly; Adamantidis, Antoine Roger; Burdakov, Denis (2016). Awake dynamics and brain-wide direct inputs of hypothalamic MCH and orexin networks. Nature communications, 7(11395), p. 11395. Nature Publishing Group 10.1038/ncomms11395

Preview

Text ncomms11395.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (2MB) | Preview

The lateral hypothalamus (LH) controls energy balance. LH melanin-concentrating-hormone (MCH) and orexin/hypocretin (OH) neurons mediate energy accumulation and expenditure, respectively. MCH cells promote memory and appropriate stimulus-reward associations; their inactivation disrupts energy-optimal behaviour and causes weight loss. However, MCH cell dynamics during wakefulness are unknown, leaving it unclear if they differentially participate in brain activity during sensory processing. By fiberoptic recordings from molecularly defined populations of LH neurons in awake freely moving mice, we show that MCH neurons generate conditional population bursts. This MCH cell activity correlates with novelty exploration, is inhibited by stress and is inversely predicted by OH cell activity. Furthermore, we obtain brain-wide maps of monosynaptic inputs to MCH and OH cells, and demonstrate optogenetically that VGAT neurons in the amygdala and bed nucleus of stria terminalis inhibit MCH cells. These data reveal cell-type-specific LH dynamics during sensory integration, and identify direct neural controllers of MCH neurons.

Interest & Impact

Downloads

213 since deposited on 16 Sep 2016
20 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item