Article
Multidisciplinary Sciences
Roberto De Luca, Stefano Nardone, Kevin P. Grace, Anne Venner, Michela Cristofolini, Sathyajit S. Bandaru, Lauren T. Sohn, Dong Kong, Takatoshi Mochizuki, Bianca Viberti, Lin Zhu, Antonino Zito, Thomas E. Scammell, Clifford B. Saper, Bradford B. Lowell, Patrick M. Fuller, Elda Arrigoni
Summary: This study investigates the mechanisms by which orexin neurons contribute to arousal maintenance and state stability through silencing sleep-promoting neurons. The findings provide alternate insights into the role of orexin neurons in maintaining wakefulness.
NATURE COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Andrey Kostin, Md. Aftab Alam, Anton Saevskiy, Chenyi Yang, Peyman Golshani, Md. Noor Alam
Summary: This study used calcium imaging to characterize the activity dynamics of ventrolateral preoptic area (VLPO) neurons and found that they play an important role in spontaneous sleep-waking and homeostatic sleep regulation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Neurosciences
Giulia Miracca, Berta Anuncibay-Soto, Kyoko Tossell, Raquel Yustos, Alexei L. Vyssotski, Nicholas P. Franks, William Wisden
Summary: The lateral preoptic hypothalamus plays a crucial role in NREM and REM sleep induction and NREM sleep homeostasis. Surprisingly, calcium signals in the lateral preoptic hypothalamus were found to be highest during REM sleep. NMDA receptors in the lateral preoptic hypothalamus were identified as the main drivers of excitation. Deleting these NMDA receptors led to insomnia and fragmented sleep patterns. The sleep fragmentation was specifically attributed to NMDA receptors on GABA neurons in the lateral preoptic hypothalamus.
JOURNAL OF NEUROSCIENCE
(2022)
Article
Multidisciplinary Sciences
Shohei Nishimon, Noriaki Sakai, Seiji Nishino
Summary: Sleep deprivation has negative effects on health, productivity, and performance. This study found that sake yeast can effectively reduce wake time, enhance REM and NREM sleep, and may induce sleep through activation of the adenosine A(2A) receptor. Further research is needed to verify the role of adenosine in the pathophysiology of insomnia.
SCIENTIFIC REPORTS
(2021)
Article
Biochemistry & Molecular Biology
Elda Arrigoni, Patrick M. Fuller
Summary: The article reviews the history of the preoptic area, focusing on the role of the ventrolateral preoptic nucleus (VLPO) in sleep-wake control. It also attempts to synthesize the current understanding of the circuit, cellular, and synaptic bases of the VLPO.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Multidisciplinary Sciences
Tomoko Yamagata, Martin C. Kahn, Jose Prius-Mengual, Elise Meijer, Merima Sabanovic, Mathilde C. C. Guillaumin, Vincent van der Vinne, Yi-Ge Huang, Laura E. McKillop, Aarti Jagannath, Stuart N. Peirson, Edward O. Mann, Russell G. Foster, Vladyslav V. Vyazovskiy
Summary: The inhibitory neurons in the lateral preoptic area (LPO) of the hypothalamus play a role in regulating arousal levels, impacting both the quality of sleep and the accumulation of sleep pressure.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Clinical Neurology
Philip C. Smith, Derrick J. Phillips, Ana Pocivavsek, Carissa A. Byrd, Shaun S. Viechweg, Brian Hampton, Jessica A. Mong
Summary: The study investigated the effects of estradiol (E2) on sleep, finding that E2 decreases homeostatic sleep need and influences adenosine signaling in the MnPO. These results suggest that E2 may attenuate the local effects of A(2A) receptors in the MnPO, potentially explaining estrogenic suppression of sleep behavior and changes in homeostatic sleep need.
Article
Neurosciences
In-Sun Choi, Jae-Hong Kim, Ji-Young Jeong, Maan-Gee Lee, Kyoungho Suk, Il-Sung Jang
Summary: This study reveals a novel mechanism involving astrocyte-neuron interactions in sleep regulation, where ATP derived from astrocytes is converted into adenosine by TNAP. Adenosine inhibits non-sleep-promoting neurons and excites sleep-promoting neurons, thereby affecting sleep-wake cycle. This finding has important implications for understanding the physiological basis of sleep regulation.
Review
Cell Biology
Jose Donato, Frederick Wasinski, Isadora C. Furigo, Martin Metzger, Renata Frazao
Summary: Growth hormone plays a crucial role in regulating metabolism in the brain, affecting food intake, energy expenditure, blood sugar levels, and neuroendocrine changes. It acts as a hormonal factor that conveys homeostatic information to the brain to produce metabolic adjustments in order to promote energy homeostasis.
Article
Neurosciences
Jun Jiang, Guangyuan Zou, Jiayi Liu, Shuqin Zhou, Jing Xu, Hongqiang Sun, Qihong Zou, Jia-Hong Gao
Summary: Animal experiments demonstrate the crucial role of the hypothalamus in regulating sleep-wake cycles, while neuroimaging studies suggest the presence of wake-promoting and sleep-promoting regions within the human hypothalamus. Functional network organization of the hypothalamus shifts between wakefulness and sleep, with different brain regions showing varying connectivity patterns.
HUMAN BRAIN MAPPING
(2021)
Review
Neurosciences
Rebecca Rothhaas, Shinjae Chung
Summary: Sleep and body temperature are tightly interconnected in mammals, with the preoptic area of the hypothalamus playing a crucial role in regulating these behaviors. Recent research on sleep- and thermo-regulatory POA neurons has raised new questions about the overlap and pathways of these neurons and the role of signaling molecules in coordinating sleep and body temperature regulation.
FRONTIERS IN NEUROSCIENCE
(2021)
Article
Neurosciences
Kseniia Prokofeva, Yuki C. Saito, Yasutaka Niwa, Seiya Mizuno, Satoru Takahashi, Arisa Hirano, Takeshi Sakurai
Summary: To understand the regulation of sleep-wakefulness cycles, it is important to study the relationship between the preoptic area (POA) and lateral hypothalamic area (LHA), which have opposing roles in sleep-wakefulness regulation. This study revealed the direct connection between GABA- and galanin-producing neurons in the ventrolateral preoptic nucleus (VLPO) and orexin-producing neurons in the LHA. It also discovered that the VLPOGABA-LHA pathway plays a previously unknown role in the regulation of sleep and wakefulness.
JOURNAL OF NEUROSCIENCE
(2023)
Article
Biology
Shuyun Xiao, Valerie Michael, Richard Mooney
Summary: This study reveals that neurons suppressing vocalizations are activated by predator cues or inhibitory social contexts in mice. It also uncovers how the brain weighs factors promoting and suppressing vocal production, and how the activation of specific neurons influences the decision to vocalize in mice.
Article
Cell Biology
Shuo Yang, Yu Lin Tan, Xiaohua Wu, Jingjie Wang, Jingjing Sun, Anqi Liu, Linhua Gan, Bo Shen, Xiaocui Zhang, Yu Fu, Ju Huang
Summary: Enhanced appetite in response to low temperature serves as a behavioral thermoregulation mechanism, with AgRP neurons in the hypothalamus being activated by cold exposure. Neurons in the medial preoptic area (mPOA) make excitatory synapses onto AgRP neurons in the arcuate nucleus (ARC), modulating feeding behavior in cold-evoked conditions.
Review
Neurosciences
Sarah L. Reitz, Max B. Kelz
Summary: The hypothalamic preoptic area (POA) plays a crucial role in regulating arousal states in both natural and drug-induced forms of unconsciousness. While known for promoting sleep and wake, the complexity and molecular heterogeneity of the POA make it challenging to distinguish between different populations of neurons involved in these processes.
FRONTIERS IN NEUROSCIENCE
(2021)