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Sleep deprivation drosophila

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
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...
2016: BMC Evolutionary Biology
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
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...
June 25, 2016: Neuroscience Research
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...
2016: Sleep
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...
2016: Sleep
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
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
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
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
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
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
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
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
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
Nancy J Linford, Jennifer Ro, Brian Y Chung, Scott D Pletcher
Sleep loss is an adaptive response to nutrient deprivation that alters behavior to maximize the chances of feeding before imminent death. Organisms must maintain systems for detecting the quality of the food source to resume healthy levels of sleep when the stress is alleviated. We determined that gustatory perception of sweetness is both necessary and sufficient to suppress starvation-induced sleep loss when animals encounter nutrient-poor food sources. We further find that blocking specific dopaminergic neurons phenocopies the absence of gustatory stimulation, suggesting a specific role for these neurons in transducing taste information to sleep centers in the brain...
February 24, 2015: Proceedings of the National Academy of Sciences of the United States of America
Brendan P Lucey, Averi Leahy, Regine Rosas, Paul J Shaw
BACKGROUND AND STUDY OBJECTIVES: A relationship between sleep and seizures is well-described in both humans and rodent animal models; however, the mechanism underlying this relationship is unknown. Using Drosophila melanogaster mutants with seizure phenotypes, we demonstrate that seizure activity can be modified by sleep deprivation. DESIGN: Seizure activity was evaluated in an adult bang-sensitive seizure mutant, stress sensitive B (sesB(9ed4)), and in an adult temperature sensitive seizure mutant seizure (sei(ts1)) under baseline and following 12 h of sleep deprivation...
May 2015: Sleep
Maria E Yurgel, Pavel Masek, Justin DiAngelo, Alex C Keene
Dysregulation of sleep and metabolism has enormous health consequences. Sleep loss is linked to increased appetite and insulin insensitivity, and epidemiological studies link chronic sleep deprivation to obesity-related disorders including type II diabetes and cardiovascular disease. Interactions between sleep and metabolism involve the integration of signaling from brain regions regulating sleep, feeding, and metabolic function. Investigating the relationship between these processes provides a model to address more general questions of how the brain prioritizes homeostatically regulated behaviors...
September 2015: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
Tzu-Hsing Kuo, Julie A Williams
STUDY OBJECTIVES: Sleep is known to increase as an acute response to infection. However, the function of this behavioral response in host defense is not well understood. To address this problem, we evaluated the effect of acute sleep deprivation on post-infection sleep and immune function in Drosophila. SETTING: Laboratory. PARTICIPANTS: Drosophila melanogaster. METHODS AND RESULTS: Flies were subjected to sleep deprivation before (early DEP) or after (late DEP) bacterial infection...
May 2014: Sleep
Matthew S Kayser, Zhifeng Yue, Amita Sehgal
Most animals sleep more early in life than in adulthood, but the function of early sleep is not known. Using Drosophila, we found that increased sleep in young flies was associated with an elevated arousal threshold and resistance to sleep deprivation. Excess sleep results from decreased inhibition of a sleep-promoting region by a specific dopaminergic circuit. Experimental hyperactivation of this circuit in young flies results in sleep loss and lasting deficits in adult courtship behaviors. These deficits are accompanied by impaired development of a single olfactory glomerulus, VA1v, which normally displays extensive sleep-dependent growth after eclosion...
April 18, 2014: Science
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