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https://www.readbyqxmd.com/read/28938796/complex-interactions-of-circadian-rhythms-eating-behaviors-and-the-gastrointestinal-microbiota-and-their-potential-impact-on-health
#1
Jennifer L Kaczmarek, Sharon V Thompson, Hannah D Holscher
Human health is intricately intertwined with the composition and function of the trillions of microorganisms that make up the gastrointestinal (GI) microbiome. The GI microbiome is essentially a microbial organ that provides metabolic, immunologic, and protective functions for the host. Habitual diet, changes in macronutrient composition, and consumption of nondigestible dietary fibers have all been shown to impact the human GI microbiome. Intriguingly, the impact of diet on the microbiome may be related not only to what humans eat but also to the timing of food consumption...
September 1, 2017: Nutrition Reviews
https://www.readbyqxmd.com/read/28938464/sex-differences-in-steroid-receptor-co-expression-and-circadian-timed-activation-of-kisspeptin-and-rfrp-3-neurons-may-contribute-to-the-sexually-dimorphic-basis-of-the-lh-surge
#2
Matthew C Poling, Elena Y Luo, Alexander S Kauffman
In rodents, the ovulation-inducing LH surge is sexually dimorphic, occurring only in females, but the reasons for this sex difference are unclear. Two neuropeptides, kisspeptin and RFRP-3, are hypothesized to regulate the GnRH/LH surge. In females, both these systems show circadian changes coincident with the LH surge, but whether males show similar temporal changes under comparable hormonal conditions is unknown. Here, we evaluated circadian time (CT)-dependent changes in gene expression and neuronal activation of Kiss1 and Rfrp neurons of female and male mice given identical LH surge-inducing estrogen regimens...
August 9, 2017: Endocrinology
https://www.readbyqxmd.com/read/28938117/retraction-notice-to-calcium-and-sol-protease-mediate-temperature-resetting-of-circadian-clocks
#3
Ozgur Tataroglu, Xiaohu Zhao, Ania Busza, Jinli Ling, John S O'Neill, Patrick Emery
No abstract text is available yet for this article.
September 21, 2017: Cell
https://www.readbyqxmd.com/read/28938081/sleep-in-insects
#4
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/28937687/metabolism-ketogenic-diet-rewires-circadian-clock
#5
Claire Greenhill
No abstract text is available yet for this article.
September 22, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28937654/genome-wide-analysis-of-cca1-like-proteins-in-soybean-and-functional-characterization-of-gmmyb138a
#6
Shaomin Bian, Donghao Jin, Ruihua Li, Xin Xie, Guoli Gao, Weikang Sun, Yuejia Li, Lulu Zhai, Xuyan Li
Plant CIRCADIAN CLOCK ASSOCIATED1 (CCA1)-like proteins are a class of single-repeat MYELOBLASTOSIS ONCOGENE (MYB) transcription factors generally featured by a highly conserved motif SHAQK(Y/F)F, which play important roles in multiple biological processes. Soybean is an important grain legume for seed protein and edible vegetable oil. However, essential understandings regarding CCA1-like proteins are very limited in soybean. In this study, 54 CCA1-like proteins were identified by data mining of soybean genome...
September 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28936981/drought-stress-modulates-diurnal-oscillations-of-circadian-clock-and-drought-responsive-genes-in-oryza-sativa-l
#7
Jia Li, Yun-Hua Liu, Yu Zhang, Chen Chen, Xia Yu, Shun-Wu Yu
Endogenous circadian rhythms play a key role in regulating plant growth and development, and in allowing plants to respond and adapt to changing environments. To understand how drought regulates upland rice(Oryza sativa L.) IRAT109, we examined the expression levels of circadian clock and drought-responsive genes through real-time PCR. The results revealed that, first, drought reduced the relative expression level and amplitude of peak expression of several morning circadian clock components (such as OsPRRs, OsLHY and OsZTL1), increased the relative expression level and amplitude of some evening circadian clock components (such as OsTOC1, OsGI and OsELF3), but did not influence OsFKF1...
September 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28936198/social-isolation-modulates-clock-protein-and-beta-catenin-expression-pattern-in-gonadotropin-inhibitory-hormone-neurons-in-male-rats
#8
Chuin Hau Teo, Tomoko Soga, Ishwar S Parhar
Postweaning social isolation reduces the amplitude of the daily variation of CLOCK protein in the brain and induces lower reproductive activity. Gonadotropin-inhibitory hormone (GnIH) acts as an inhibitor in the reproductive system and has been linked to stress. Social isolation has been shown to lower neuronal activity of GnIH-expressing neurons in the dorsomedial hypothalamus (DMH). The exact mechanism by which social isolation may affect GnIH is still unclear. We investigated the impact of social isolation on regulatory cellular mechanisms in GnIH neurons...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28935191/circadian-rhythm-and-autonomic-dysfunction-in-presymptomatic-and-early-huntington-s-disease
#9
Elena Bellosta Diago, Jesús Pérez Pérez, Sonia Santos Lasaosa, Alejandro Viloria Alebesque, Saül Martínez Horta, Jaime Kulisevsky, Javier López Del Val
INTRODUCTION: Sleep and circadian rhythm disturbances are common in patients with neurodegenerative diseases such as Huntington's disease (HD). The aim of this study was to evaluate variability in circadian blood pressure (BP) to determine the association between abnormal circadian BP and sleep quality in patients with HD. METHODS: Cross-sectional, multicenter study of 38 HD mutation carriers (23 premanifest and 15 early stage patients) who were compared to 38 age- and sex-matched controls...
September 15, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28934261/light-entrainment-of-the-murine-intraocular-pressure-circadian-rhythm-utilizes-non-local-mechanisms
#10
Shunsuke Tsuchiya, Ethan D Buhr, Tomomi Higashide, Kazuhisa Sugiyama, Russell N Van Gelder
PURPOSE: Intraocular pressure (IOP) is known to have a strong circadian rhythm, yet how light/dark cycles entrain this rhythm is unknown. The purpose of this study was to assess whether, like the retina, the mammalian ciliary body and IOP clocks have an intrinsic ability to entrain to light/dark cycles. METHODS: Iris-ciliary body complexes were obtained from period2:luciferase (PER2::LUC) mice and cultured to measure bioluminescence rhythmicity. Pairs of the iris-ciliary body complex were exposed to antiphasic 9:15 h light/dark cycle in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28933632/influence-of-light-and-food-on-the-circadian-clock-in-liver-of-rainbow-trout-oncorhynchus-mykiss
#11
Juan Hernández-Pérez, Jesús M Míguez, Fatemeh Naderi, José L Soengas, Marcos A López-Patiño
Several reports support the existence of multiple peripheral oscillators in fish, which may be able to modulate the rhythmic functions developed by those tissues hosting them. Thus, a circadian oscillator has been proposed to be located within fish liver. In this vertebrate group, the role played by the circadian system in regulating metabolic processes in liver is mostly unknown. We, therefore investigated the liver of rainbow trout (Oncorhynchus mykiss) as a potential element participating in the regulation of circadian rhythms in fish by hosting a functional circadian oscillator...
September 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28933568/seasonal-variation-in-plasma-lipids-and-lipases-in-young-healthy-humans
#12
Trinitat Cambras, Juan A Baena-Fustegueras, Eva Pardina, David Ricart-Jané, Joana Rossell, Antoni Díez-Noguera, Julia Peinado-Onsurbe
Although intermediate metabolism is known to follow circadian rhythms, little information is available on the variation in lipase activities (lipoprotein and hepatic lipase, LPL and HL, respectively) and lipids throughout the year. In a cross-sectional study, we collected and analysed blood from 245 healthy students (110 men and 135 women) between 18 and 25 years old from the University of Barcelona throughout the annual campaign (March, May, October and December) of the blood bank. All subjects gave their written informed consent to participate...
September 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28933566/validation-of-the-messi-among-adult-workers-and-young-students-general-health-and-personality-correlates
#13
Juan F Díaz-Morales, Christoph Randler, Arturo Arrona-Palacios, Ana Adan
The aim of this study was to provide validity for the Spanish version of the Morningness-Eveningness-Stability Scale - improved (MESSi), a novel evolved assessment of circadian typology which considers the subjective phase and amplitude by morning affect (MA), eveningness (EV) and distinctness (DI; subjective amplitude) sub-scales. Convergence validity of the MESSi with the reduced Morningness-Eveningness Questionnaire (rMEQ) and relationships with the General Health Questionnaire (GHQ-12) and sensitivity to reward and punishment (SR and SP) were analyzed...
September 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28933565/sleep-duration-nightshift-work-and-the-timing-of-meals-and-urinary-levels-of-8-isoprostane-and-6-sulfatoxymelatonin-in-japanese-women
#14
Chisato Nagata, Takashi Tamura, Keiko Wada, Kie Konishi, Yuko Goto, Yasuko Nagao, Kazuhiro Ishihara, Satoru Yamamoto
It has been hypothesized that disruption of circadian rhythms affects human health. Shift work and sleep deprivation are thought to disrupt the normal light-dark cycle, although the disruption due to shiftwork may be dependent on sleep deprivation. Both conditions have been suggested to be associated with an increased risk of cardiometabolic disorders. Non-photic environmental factors, such as the timing of eating, are also thought to regulate circadian rhythm and thus, may have effects on health, but the evidence from human studies is scarce...
September 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28933062/hypothalamic-dysfunction-in-obesity-and-metabolic-disorders
#15
Sara Carmo-Silva, Cláudia Cavadas
The hypothalamus is the brain region responsible for the maintenance of energetic homeostasis. The regulation of this process arises from the ability of the hypothalamus to orchestrate complex physiological responses such as food intake and energy expenditure, circadian rhythm, stress response, and fertility. Metabolic alterations such as obesity can compromise these hypothalamic regulatory functions. Alterations in circadian rhythm, stress response, and fertility further contribute to aggravate the metabolic dysfunction of obesity and contribute to the development of chronic disorders such as depression and infertility...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28933033/sleep-disturbance-after-tbi
#16
REVIEW
Surendra Barshikar, Kathleen R Bell
PURPOSE OF REVIEW: Present relevant literature to update knowledge on sleep science, identify common sleep disturbances seen in TBI, discuss evidence for available treatment options, and illuminate future areas for research. RECENT FINDINGS: Sleep disturbances, including insomnia, circadian rhythm disturbances, and sleep apnea, are prevalent for all severities of traumatic brain injury (TBI), can be chronic, and affect both rehabilitation and recovery from the TBI...
September 20, 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28931919/ror%C3%AE-2-requires-lsd1-to-enhance-tumor-progression-in-breast-cancer
#17
Kyeongkyu Kim, Ji Min Lee, Young Suk Yu, Hyunkyung Kim, Hye Jin Nam, Hyeong-Gon Moon, Dong-Young Noh, Keun Il Kim, Sungsoon Fang, Sung Hee Baek
Retinoic acid-related orphan receptor α (RORα) regulates diverse physiological processes, including inflammatory responses, lipid metabolism, circadian rhythm, and cancer biology. RORα has four different isoforms which have distinct N-terminal domains but share identical DNA binding domain and ligand binding domain in human. However, lack of specific antibody against each RORα isoform makes biochemical studies on each RORα isoform remain unclear. Here, we generate RORα2-specific antibody and characterize the role of RORα2 in promoting tumor progression in breast cancer...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931163/influence-of-quercetin-in-the-temporal-regulation-of-redox-homeostasis-in-drosophila-melanogaster
#18
Perumal Subramanian, Kanimozhi Kaliyamoorthy, Jaime Jacqueline Jayapalan, Puteri Shafinaz Abdul-Rahman, Onn Haji Hashim
Numerous biological processes are governed by the biological clock. Studies using Drosophila melanogaster (L.) are valuable that could be of importance for their effective applications on rodent studies. In this study, the beneficial role of quercetin (a flavonoid) on H2O2 induced stress in D. melanogaster was investigated. D. melanogaster flies were divided into four groups (group I - control, group II - H2O2 (acute exposure), group III - quercetin, and group IV - quercetin + H2O2 treated). Negative geotaxis assay, oxidative stress indicators (protein carbonyls, thiobarbituric reactive substances [TBARS]), and antioxidants (superoxide dismutase [SOD], catalase [CAT], glutathione-S-transferase [GST], glutathione peroxidase, and reduced glutathione [GSH]) were measured at 4 h intervals over 24 h and temporal expression of heat shock protein-70 (Hsp70), Upd1 (homolog of IL-6 in Drosophila), and nitric oxide synthase (Nos) was analyzed by Western blotting...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28930051/addiction-and-the-role-of-circadian-genes
#19
Laura A Forde, Gursharan Kalsi
OBJECTIVE: In mammals, intimate interactions exist between the circadian system and other molecular systems, and mounting evidence is suggesting that these relationships may affect substance use disorders. Research in preclinical models supports the role of circadian genes as risk factors for addiction. Here, we explore the evidence and review human genetic studies testing the association between specific circadian genes and substance use disorders. METHOD: A literature search was conducted in PubMed for studies testing variants in eight circadian genes known to be central to the functioning of the master clock in the brain...
September 2017: Journal of Studies on Alcohol and Drugs
https://www.readbyqxmd.com/read/28929129/an-automated-home-cage-system-to-assess-learning-and-performance-of-a-skilled-motor-task-in-a-mouse-model-of-huntington-s-disease
#20
Cameron L Woodard, Federico Bolaños, James D Boyd, Gergely Silasi, Timothy H Murphy, Lynn A Raymond
Behavioral testing is a critical step in assessing the validity of rodent models of neurodegenerative disease, as well as evaluating the efficacy of pharmacological interventions. In models of Huntington's disease (HD), a gradual progression of impairments is observed across ages, increasing the need for sensitive, high-throughput and longitudinal assessments. Recently, a number of automated systems have been developed to perform behavioral profiling of animals within their own home-cage, allowing for 24-h monitoring and minimizing experimenter interaction...
September 2017: ENeuro
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