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Sleep deprivation drosophila

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https://www.readbyqxmd.com/read/28984573/sleep-homeostasis-regulated-by-5ht2b-receptor-in-a-small-subset-of-neurons-in-the-dorsal-fan-shaped-body-of-drosophila
#1
Yongjun Qian, Yue Cao, Bowen Deng, Guang Yang, Jiayun Li, Rui Xu, Dandan Zhang, Juan Huang, Yi Rao
Our understanding of molecular mechanisms underlying sleep homeostasis is limited. We have taken a systematic approach to study neural signaling by the transmitter 5-hydroxytryptamine (5-HT) in Drosophila. We have generated knockout and knockin lines for Trh, the 5-HT synthesizing enzyme and all five 5-HT receptors, making it possible for us to determine their expression patterns and to investigate their functional roles. Loss of the Trh, 5HT1a or 5HT2b gene decreased sleep time whereas loss of the Trh or 5HT2b gene diminished sleep rebound after sleep deprivation...
October 6, 2017: ELife
https://www.readbyqxmd.com/read/28938081/sleep-in-insects
#2
Charlotte Helfrich-Förster
Sleep is essential for proper brain function in mammals and insects. During sleep, animals are disconnected from the external world; they show high arousal thresholds and changed brain activity. Sleep deprivation results in a sleep rebound. Research using the fruit fly, Drosophila melanogaster, has helped us understand the genetic and neuronal control of sleep. Genes involved in sleep control code for ion channels, factors influencing neurotransmission and neuromodulation, and proteins involved in the circadian clock...
September 22, 2017: Annual Review of Entomology
https://www.readbyqxmd.com/read/28893376/regulation-of-sleep-homeostasis-by-sexual-arousal
#3
Esteban J Beckwith, Quentin Geissmann, Alice S French, Giorgio F Gilestro
In all animals, sleep pressure is under continuous tight regulation. It is universally accepted that this regulation arises from a two-process model, integrating both a circadian and a homeostatic controller. Here we explore the role of environmental social signals as a third, parallel controller of sleep homeostasis and sleep pressure. We show that, in Drosophila melanogaster males, sleep pressure after sleep deprivation can be counteracted by raising their sexual arousal, either by engaging the flies with prolonged courtship activity or merely by exposing them to female pheromones...
September 12, 2017: ELife
https://www.readbyqxmd.com/read/28541527/sleep-dependent-modulation-of-metabolic-rate-in-drosophila
#4
Bethany A Stahl, Melissa E Slocumb, Hersh Chaitin, Justin R DiAngelo, Alex C Keene
Study Objectives: Dysregulation of sleep is associated with metabolic diseases, and metabolic rate (MR) is acutely regulated by sleep-wake behavior. In humans and rodent models, sleep loss is associated with obesity, reduced metabolic rate, and negative energy balance, yet little is known about the neural mechanisms governing interactions between sleep and metabolism. Methods: We have developed a system to simultaneously measure sleep and MR in individual Drosophila, allowing for interrogation of neural systems governing interactions between sleep and metabolic rate...
August 1, 2017: Sleep
https://www.readbyqxmd.com/read/28314820/amyloid-precursor-protein-in-drosophila-glia-regulates-sleep-and-genes-involved-in-glutamate-recycling
#5
Abud Jose Farca Luna, Magali Perier, Laurent Seugnet
Amyloid precursor protein (App) plays a crucial role in Alzheimer's disease via the production and deposition of toxic β-amyloid peptides. App is heavily expressed in neurons, the focus of the vast majority of studies investigating its function. Meanwhile, almost nothing is known about App's function in glia, where it is also expressed, and can potentially participate in the regulation of neuronal physiology. In this report, we investigated whether Appl, the Drosophila homolog of App, could influence sleep-wake regulation when its function is manipulated in glial cells...
April 19, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27667510/pharmacodynamic-study-on-insomnia-curing-effects-of-shuangxia-decoction-in-drosophila-melanogaster
#6
Zhi-Qian Zhang, Degejin, Di Geng, Qi Zhang, Yan Tian, Yuan Xi, Wen-Qi Wang, Hua-Qi Tang, Bing Xu, Hong-Ying Lin, Yi-Kun Sun
The present study aimed to establish a pharmacodynamic method using the pySolo software to explore the influence of freeze-dried powders of Shuangxia Decoction (SXD) on the sleep of normal Drosophila melanogaster and the Drosophila melanogaster whose sleep was divested by light. The dose-effect and the time-effect relationships of SXD on sleep were examined. The effect-onset concentration of SXD was 0.25%, the plateau appeared at the concentration of 2.5% and the total sleep time showed a downtrend when the concentration was greater than 2...
September 2016: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/27567640/transgenerational-plasticity-following-a-dual-pathogen-and-stress-challenge-in-fruit-flies
#7
M Nystrand, E J Cassidy, D K Dowling
BACKGROUND: Phenotypic plasticity operates across generations, when the parental environment affects phenotypic expression in the offspring. Recent studies in invertebrates have reported transgenerational plasticity in phenotypic responses of offspring when the mothers had been previously exposed to either live or heat-killed pathogens. Understanding whether this plasticity is adaptive requires a factorial design in which both mothers and their offspring are subjected to either the pathogen challenge or a control, in experimentally matched and mismatched combinations...
August 27, 2016: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/27487216/operation-of-a-homeostatic-sleep-switch
#8
Diogo Pimentel, Jeffrey M Donlea, Clifford B Talbot, Seoho M Song, Alexander J F Thurston, Gero Miesenböck
Sleep disconnects animals from the external world, at considerable risks and costs that must be offset by a vital benefit. Insight into this mysterious benefit will come from understanding sleep homeostasis: to monitor sleep need, an internal bookkeeper must track physiological changes that are linked to the core function of sleep. In Drosophila, a crucial component of the machinery for sleep homeostasis is a cluster of neurons innervating the dorsal fan-shaped body (dFB) of the central complex. Artificial activation of these cells induces sleep, whereas reductions in excitability cause insomnia...
August 18, 2016: Nature
https://www.readbyqxmd.com/read/27354230/abnormal-wake-sleep-pattern-in-a-novel-gain-of-function-model-of-disc1
#9
Hanna Jaaro-Peled, Cara Altimus, Tara LeGates, Tyler Cash-Padgett, Sandra Zoubovsky, Takatoshi Hikida, Koko Ishizuka, Samer Hattar, Valérie Mongrain, Akira Sawa
Sleep disturbances are common in psychiatric disorders, but the causal relationship between the two and the underlying genetic factors is unclear. The DISC1 gene is strongly linked to mood disorders and schizophrenia in a Scottish pedigree. In an earlier study we found a sleep homeostasis disturbance in a Drosophila model overexpressing wild-type human DISC1. Here we aimed to explore the relationship between sleep and the DISC1 gene in a mammalian model, a novel transgenic mouse model expressing full-length human DISC1...
November 2016: Neuroscience Research
https://www.readbyqxmd.com/read/27306274/age-related-reduction-of-recovery-sleep-and-arousal-threshold-in-drosophila
#10
Julie Vienne, Ryanne Spann, Fang Guo, Michael Rosbash
STUDY OBJECTIVES: Physiological studies show that aging affects both sleep quality and quantity in humans, and sleep complaints increase with age. Along with knowledge about the negative effects of poor sleep on health, understanding the enigmatic relationship between sleep and aging is important. Because human sleep is similar to Drosophila (fruit fly) sleep in many ways, we addressed the effects of aging on sleep in this model organism. METHODS: Baseline sleep was recorded in five different Drosophila genotypes raised at either 21°C or 25°C...
August 1, 2016: Sleep
https://www.readbyqxmd.com/read/26951392/genetic-dissociation-of-daily-sleep-and-sleep-following-thermogenetic-sleep-deprivation-in-drosophila
#11
Christine Dubowy, Katarina Moravcevic, Zhifeng Yue, Joy Y Wan, Hans P A Van Dongen, Amita Sehgal
STUDY OBJECTIVES: Sleep rebound-the increase in sleep that follows sleep deprivation-is a hallmark of homeostatic sleep regulation that is conserved across the animal kingdom. However, both the mechanisms that underlie sleep rebound and its relationship to habitual daily sleep remain unclear. To address this, we developed an efficient thermogenetic method of inducing sleep deprivation in Drosophila that produces a substantial rebound, and applied the newly developed method to assess sleep rebound in a screen of 1,741 mutated lines...
May 1, 2016: Sleep
https://www.readbyqxmd.com/read/26604145/early-onset-sleep-defects-in-drosophila-models-of-huntington-s-disease-reflect-alterations-of-pka-creb-signaling
#12
Erin D Gonzales, Anne K Tanenhaus, Jiabin Zhang, Ryan P Chaffee, Jerry C P Yin
Huntington's disease (HD) is a progressive neurological disorder whose non-motor symptoms include sleep disturbances. Whether sleep and activity abnormalities are primary molecular disruptions of mutant Huntingtin (mutHtt) expression or result from neurodegeneration is unclear. Here, we report Drosophila models of HD exhibit sleep and activity disruptions very early in adulthood, as soon as sleep patterns have developed. Pan-neuronal expression of full-length or N-terminally truncated mutHtt recapitulates sleep phenotypes of HD patients: impaired sleep initiation, fragmented and diminished sleep, and nighttime hyperactivity...
March 1, 2016: Human Molecular Genetics
https://www.readbyqxmd.com/read/26556728/sleep-homeostasis-and-general-anesthesia-are-fruit-flies-well-rested-after-emergence-from-propofol
#13
Benjamin Gardner, Ewa Strus, Qing Cheng Meng, Thomas Coradetti, Nirinjini N Naidoo, Max B Kelz, Julie A Williams
BACKGROUND: Shared neurophysiologic features between sleep and anesthetic-induced hypnosis indicate a potential overlap in neuronal circuitry underlying both states. Previous studies in rodents indicate that preexisting sleep debt discharges under propofol anesthesia. The authors explored the hypothesis that propofol anesthesia also dispels sleep pressure in the fruit fly. To the authors' knowledge, this constitutes the first time propofol has been tested in the genetically tractable model, Drosophila melanogaster...
February 2016: Anesthesiology
https://www.readbyqxmd.com/read/26526372/identification-of-neurons-with-a-privileged-role-in-sleep-homeostasis-in-drosophila-melanogaster
#14
Glen Seidner, James E Robinson, Meilin Wu, Kurtresha Worden, Pavel Masek, Stephen W Roberts, Alex C Keene, William J Joiner
Sleep is thought to be controlled by two main processes: a circadian clock that primarily regulates sleep timing and a homeostatic mechanism that detects and responds to sleep need. Whereas abundant experimental evidence suggests that sleep need increases with time spent awake, the contributions of different brain arousal systems have not been assessed independently of each other to determine whether certain neural circuits, rather than waking per se, selectively contribute to sleep homeostasis. Using the fruit fly, Drosophila melanogaster, we found that sustained thermogenetic activation of three independent neurotransmitter systems promoted nighttime wakefulness...
November 16, 2015: Current Biology: CB
https://www.readbyqxmd.com/read/26455303/propagation-of-homeostatic-sleep-signals-by-segregated-synaptic-microcircuits-of-the-drosophila-mushroom-body
#15
Divya Sitaraman, Yoshinori Aso, Xin Jin, Nan Chen, Mario Felix, Gerald M Rubin, Michael N Nitabach
The Drosophila mushroom body (MB) is a key associative memory center that has also been implicated in the control of sleep. However, the identity of MB neurons underlying homeostatic sleep regulation, as well as the types of sleep signals generated by specific classes of MB neurons, has remained poorly understood. We recently identified two MB output neuron (MBON) classes whose axons convey sleep control signals from the MB to converge in the same downstream target region: a cholinergic sleep-promoting MBON class and a glutamatergic wake-promoting MBON class...
November 16, 2015: Current Biology: CB
https://www.readbyqxmd.com/read/26361221/exaggerated-nighttime-sleep-and-defective-sleep-homeostasis-in-a-drosophila-knock-in-model-of-human-epilepsy
#16
Emily Petruccelli, Patrick Lansdon, Toshihiro Kitamoto
Despite an established link between epilepsy and sleep behavior, it remains unclear how specific epileptogenic mutations affect sleep and subsequently influence seizure susceptibility. Recently, Sun et al. (2012) created a fly knock-in model of human generalized epilepsy with febrile seizures plus (GEFS+), a wide-spectrum disorder characterized by fever-associated seizing in childhood and lifelong affliction. GEFS+ flies carry a disease-causing mutation in their voltage-gated sodium channel (VGSC) gene and display semidominant heat-induced seizing, likely due to reduced GABAergic inhibitory activity at high temperature...
2015: PloS One
https://www.readbyqxmd.com/read/26216041/sleep-deprivation-suppresses-aggression-in-drosophila
#17
Matthew S Kayser, Benjamin Mainwaring, Zhifeng Yue, Amita Sehgal
Sleep disturbances negatively impact numerous functions and have been linked to aggression and violence. However, a clear effect of sleep deprivation on aggressive behaviors remains unclear. We find that acute sleep deprivation profoundly suppresses aggressive behaviors in the fruit fly, while other social behaviors are unaffected. This suppression is recovered following post-deprivation sleep rebound, and occurs regardless of the approach to achieve sleep loss. Genetic and pharmacologic approaches suggest octopamine signaling transmits changes in aggression upon sleep deprivation, and reduced aggression places sleep-deprived flies at a competitive disadvantage for obtaining a reproductive partner...
2015: ELife
https://www.readbyqxmd.com/read/26147198/enhanced-sleep-is-an-evolutionarily-adaptive-response-to-starvation-stress-in-drosophila
#18
Melissa E Slocumb, Josue M Regalado, Masato Yoshizawa, Greg G Neely, Pavel Masek, Allen G Gibbs, Alex C Keene
Animals maximize fitness by modulating sleep and foraging strategies in response to changes in nutrient availability. Wild populations of the fruit fly, Drosophila melanogaster, display highly variable levels of starvation and desiccation resistance that differ in accordance with geographic location, nutrient availability, and evolutionary history. Further, flies potently modulate sleep in response to changes in food availability, and selection for starvation resistance enhances sleep, revealing strong genetic relationships between sleep and nutrient availability...
2015: PloS One
https://www.readbyqxmd.com/read/25825756/sleep-and-wake-dependent-changes-in-neuronal-activity-and-reactivity-demonstrated-in-fly-neurons-using-in-vivo-calcium-imaging
#19
Daniel Bushey, Giulio Tononi, Chiara Cirelli
Sleep in Drosophila shares many features with mammalian sleep, but it remains unknown whether spontaneous and evoked activity of individual neurons change with the sleep/wake cycle in flies as they do in mammals. Here we used calcium imaging to assess how the Kenyon cells in the fly mushroom bodies change their activity and reactivity to stimuli during sleep, wake, and after short or long sleep deprivation. As before, sleep was defined as a period of immobility of >5 min associated with a reduced behavioral response to a stimulus...
April 14, 2015: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/25754641/sleep-interacts-with-a%C3%AE-to-modulate-intrinsic-neuronal-excitability
#20
Masashi Tabuchi, Shahnaz R Lone, Sha Liu, Qili Liu, Julia Zhang, Adam P Spira, Mark N Wu
BACKGROUND: Emerging data suggest an important relationship between sleep and Alzheimer's disease (AD), but how poor sleep promotes the development of AD remains unclear. RESULTS: Here, using a Drosophila model of AD, we provide evidence suggesting that changes in neuronal excitability underlie the effects of sleep loss on AD pathogenesis. β-amyloid (Aβ) accumulation leads to reduced and fragmented sleep, while chronic sleep deprivation increases Aβ burden. Moreover, enhancing sleep reduces Aβ deposition...
March 16, 2015: Current Biology: CB
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