1. A lateral hypothalamus to basal forebrain neurocircuit promotes feeding by suppressing responses to anxiogenic environmental cues
- Author
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Yungang Lu, Blessing Felix-Okoroji, Yong Xu, Jinbin Tian, Madhavi Jere, Benjamin R. Arenkiel, Ryan M. Cassidy, Jennifer Selever, Yuanzhong Xu, Leandra R. Mangieri, and Qingchun Tong
- Subjects
Lateral hypothalamus ,genetic structures ,Basal Forebrain ,Nerve net ,Anorexia ,Biology ,Anxiety ,Environment ,Synaptic Transmission ,03 medical and health sciences ,Mice ,0302 clinical medicine ,medicine ,Animals ,GABAergic Neurons ,Research Articles ,030304 developmental biology ,2. Zero hunger ,0303 health sciences ,Basal forebrain ,Multidisciplinary ,digestive, oral, and skin physiology ,SciAdv r-articles ,Feeding Behavior ,Diagonal band of Broca ,medicine.anatomical_structure ,Anxiogenic ,nervous system ,Hypothalamic Area, Lateral ,GABAergic ,medicine.symptom ,Cues ,Nerve Net ,Neuroscience ,030217 neurology & neurosurgery ,Research Article - Abstract
LHGABA action on anxiogenic stimulus-responsive DBBGABA neurons allows indiscriminate feeding., Animals must consider competing information before deciding to eat: internal signals indicating the desirability of food and external signals indicating the risk involved in eating within a particular environment. The behaviors driven by the former are manifestations of hunger, and the latter, anxiety. The connection between pathologic anxiety and reduced eating in conditions like typical depression and anorexia is well known. Conversely, anti-anxiety drugs such as benzodiazepines increase appetite. Here, we show that GABAergic neurons in the diagonal band of Broca (DBBGABA) are responsive to indications of risk and receive monosynaptic inhibitory input from lateral hypothalamus GABAergic neurons (LHGABA). Activation of this circuit reduces anxiety and causes indiscriminate feeding. We also found that diazepam rapidly reduces DBBGABA activity while inducing indiscriminate feeding. Our study reveals that the LHGABA→DBBGABA neurocircuit overrides anxiogenic environmental cues to allow feeding and that this pathway may underlie the link between eating and anxiety-related disorders.
- Published
- 2019