AGRP neurons modulate fasting-induced anxiolytic effects

Changhong Li, Yanjun Hou, Jia Zhang, Guangzhi Sui, Xue-Liang Du, Julio Licinio, Ma Li Wong, Yunlei Yang

Research output: Contribution to journalArticle

Abstract

Recent studies indicate that activation of hypothalamic Agouti-related protein (Agrp) neurons can increase forage-related/repetitive behavior and decrease anxiety levels. However, the impact of physiological hunger states and food deprivation on anxiety-related behaviors have not been clarified. In the present study, we evaluated changes in anxiety levels induced by physiological hunger states and food deprivation, and identified the neuron population involved. Ad libitum fed and fasted mice were tested in the open field and elevated plus-maze behavioral tests. The DREADD approach was applied to selectively inhibit and stimulate neurons expressing Agrp in hypothalamic arcuate nucleus in Agrp-Cre transgenic mice. We found that anxiety levels were significantly reduced in the late light period when mice have increased need for food and increased Agrp neurons firing, in contrast to the levels in the early light period. Consistently, we also found that anxiety was potently reduced in 24-h fasted mice, relative to 12-h fasted mice or fed ad libitum. Mechanistically, we found that chemogenetic activation of Agrp neurons reduced anxiety in fed mice, and inactivation of Agrp neurons reduced fasting-induced anxiolytic effects. Our results suggest that anxiety levels may vary physiologically with the increasing need for food, and are influenced by acute fasting in a time-dependent manner. Agrp neurons contribute to fasting-induced anxiolytic effects, supporting the notion that Agrp neuron may serve as an entry point for the treatment of energy states-related anxiety disorders.

Original languageEnglish (US)
Article number111
JournalTranslational Psychiatry
Volume9
Issue number1
DOIs
StatePublished - Dec 1 2019

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Agouti-Related Protein
Anti-Anxiety Agents
Fasting
Anxiety
Neurons
Food Deprivation
Hunger
Light
Food
Arcuate Nucleus of Hypothalamus
Anxiety Disorders
Transgenic Mice

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Cellular and Molecular Neuroscience
  • Biological Psychiatry

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AGRP neurons modulate fasting-induced anxiolytic effects. / Li, Changhong; Hou, Yanjun; Zhang, Jia; Sui, Guangzhi; Du, Xue-Liang; Licinio, Julio; Wong, Ma Li; Yang, Yunlei.

In: Translational Psychiatry, Vol. 9, No. 1, 111, 01.12.2019.

Research output: Contribution to journalArticle

Li, Changhong ; Hou, Yanjun ; Zhang, Jia ; Sui, Guangzhi ; Du, Xue-Liang ; Licinio, Julio ; Wong, Ma Li ; Yang, Yunlei. / AGRP neurons modulate fasting-induced anxiolytic effects. In: Translational Psychiatry. 2019 ; Vol. 9, No. 1.
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