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https://www.readbyqxmd.com/read/28929336/melatonin-alters-amino-acid-metabolism-and-inflammatory-responses-in-colitis-mice
#1
Gang Liu, Qian Jiang, Shuai Chen, Jun Fang, Wenkai Ren, Jie Yin, Kang Yao, Yulong Yin
Inflammatory bowel disease is a chronic inflammatory dysfunction of the gastrointestinal tract. This study explored the hypothesis that melatonin has beneficial functions in the mouse model of colitis induced by dextran sodium sulfate (DSS), with a specific focus on the expression of intestinal inflammatory cytokines and the serum levels of amino acids. The results revealed that mice with melatonin supplementation had a reduction in weight loss and disease index induced by DSS treatment. Melatonin stifled the expression of colonic IL-17 in mice with DSS-induced colitis...
September 19, 2017: Amino Acids
https://www.readbyqxmd.com/read/28923598/testicular-atrophy-and-reproductive-quiescence-in-photorefractory-and-scotosensitive-quail-involvement-of-hypothalamic-deep-brain-photoreceptors-and-gnrh-gnih-system
#2
Somanshu Banerjee, Chandra Mohini Chaturvedi
Birds time their daily and seasonal activities in synchronization with circadian and annual periodicities in the environment, which is mainly provided by changes in photoperiod/day length conditions. Photoperiod appears to act at the level of eye, pineal and encephalic/deep brain photoperception and thus entrain the hypothalamic clock as well as reproductive circuitry in different avian species. In this article our focus of study is to elucidate out the underlying molecular mechanism of modulation of the hypothalamic reproductive circuitry following the photoperception through the hypothalamic photoreceptor cells and the subsequent alteration in the reproductive responses in quail, kept under different simulated photoperiodic conditions...
September 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28921528/practitioner-review-treatment-of-chronic-insomnia-in-children-and-adolescents-with-neurodevelopmental-disabilities
#3
REVIEW
Oliviero Bruni, Marco Angriman, Fabrizio Calisti, Alessandro Comandini, Giovanna Esposito, Samuele Cortese, Raffaele Ferri
BACKGROUND: Sleep disturbances, in particular insomnia, represent a common problem in children with neurodevelopmental disabilities (NDDs). Currently, there are no approved medications for insomnia in children by the US Food and Drug Administration or European Medicines Agency and therefore they are prescribed off-label. We critically reviewed pediatric literature on drugs as well as nonpharmacological (behavioral) interventions used for sleep disturbances in children with NDDs. METHODS: PubMed, Ovid (including PsycINFO, Ovid MEDLINE(®) , and Embase), and Web of Knowledge databases were searched through February 12, 2017, with no language restrictions...
September 18, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28920512/rhythmic-three-part-harmony-the-complex-interaction-of-maternal-placental-and-fetal-circadian-systems
#4
Peter J Mark, Rachael C Crew, Michaela D Wharfe, Brendan J Waddell
From the perspective of circadian biology, mammalian pregnancy presents an unusual biological scenario in which an entire circadian system (i.e., that of the fetus) is embodied within another (i.e., that of the mother). Moreover, both systems are likely to be influenced at their interface by a third player, the placenta. Successful pregnancy requires major adaptations in maternal physiology, many of which involve circadian changes that support the high metabolic demands of the growing fetus. A functional role for maternal circadian adaptations is implied by the effects of circadian disruption, which result in pregnancy complications including higher risks for miscarriage, preterm labor, and low birth weight...
September 1, 2017: Journal of Biological Rhythms
https://www.readbyqxmd.com/read/28920038/comparing-the-effect-of-preoperative-administration-of-melatonin-and-passiflora-incarnata-on-postoperative-cognitive-disorders-in-adult-patients-undergoing-elective-surgery
#5
Faranak Rokhtabnak, Mohammad Reza Ghodraty, Alireza Kholdebarin, Ali Khatibi, Seyedeh Somayeh Seyed Alizadeh, Zahra Sadat Koleini, Mohammad Mahdi Zamani, Alireza Pournajafian
BACKGROUND: Anxiety is a preoperative complication, which most patients encounter. The use of a premedication to reduce preoperative anxiety with minimal cognitive impairment is crucial. OBJECTIVES: This study was conducted to compare the sedative effect of preoperative melatonin and Passiflora incarnata in patients undergoing elective surgery regarding their potential for postoperative cognitive disorders. METHODS: In this clinical trial, 52 patients American society of anesthesiologists grade (ASA) I and II of both genders were selected to receive either Passiflora incarnata (1000 mg nature made) (n = 26) or melatonin (6 mg) (n = 26) as premedication one hour before surgery...
February 2017: Anesthesiology and Pain Medicine
https://www.readbyqxmd.com/read/28918172/melatonin-and-periodontal-tissues-molecular-and-clinical-perspectives
#6
REVIEW
Agata Rita Carpentieri, María Elena Peralta Lopez, Javier Aguilar, Verónica Mariana Solá
Periodontal disease is a frequent chronic inflammatory pathology that implies the destruction of the tissues supporting the teeth, which represents a high sanitary cost. It usually appears associated with other systemic conditions such as diabetes, metabolic syndrome, depression and Alzheimer disease among others. The presence of melatonin and its receptors in the oral cavity supports the hypothesis that this hormone could play a role in homeostasis of periodontal tissues. In the present review we will discuss the potential role of melatonin, a circadian synchronizing hormone, with proved antiinflammatory and antioxidant profile, in the pathogenesis and treatment of periodontitis...
September 13, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28915567/melatonin-inhibits-sirt1-dependent-nampt-and-nfat5-signaling-in-chondrocytes-to-attenuate-osteoarthritis
#7
Jia Yi Guo, Feng Li, Yong Bing Wen, Hong Xun Cui, Ma Long Guo, Lin Zhang, Yun Fei Zhang, Yan Jin Guo, Yan Xing Guo
Osteoarthritis (OA) is a degenerative joint disease mainly characterized by cartilage degradation. Interleukin-1β (IL-1β) contributes to OA pathogenesis by enhancing oxidative stress and inflammation. Melatonin reportedly elicits potent protection against OA. However, the role of melatonin and underlying mechanism in IL-1β-stimulated chondrocytes remain largely unclear. In this study, we found that melatonin inhibited IL-1β-induced toxicity and sirtuin 1 (Sirt1) enhancement in human chondrocytes. Melatonin reduced the IL-1β-increased nicotinamide phosphoribosyltransferase (NAMPT) expression and the NAD(+) level in chondrocytes in a Sirt1-dependent manner...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28912098/melatonin-mediated-upregulation-of-sirt3-attenuates-sodium-fluoride-induced-hepatotoxicity-by-activating-the-mt1-pi3k-akt-pgc-1%C3%AE-signaling-pathway
#8
Chao Song, Jiamin Zhao, Beibei Fu, Dan Li, Tingchao Mao, Wei Peng, Haibo Wu, Yong Zhang
Mitochondrial reactive oxygen species (ROS) production has been implicated in the pathogenesis of fluoride toxicity in liver. Melatonin, an indolamine synthesized in the pineal gland, was previously shown to protect against sodium fluoride (NaF)-induced hepatotoxicity. This study investigated the protective effects of melatonin pretreatment on NaF-induced hepatotoxicity and elucidates the potential mechanism of melatonin-mediated protection. Reducing mitochondrial ROS by melatonin substantially attenuated NaF-induced NADPH oxidase 4 (Nox4) upregulation and cytotoxicity in L-02 cells...
September 11, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28911277/analysis-of-different-melatonin-secretion-patterns-in-children-with-sleep-disorders-melatonin-secretion-patterns-in-children
#9
Ana Checa-Ros, Antonio Muñoz-Hoyos, Antonio Molina-Carballo, Antonio Muñoz-Gallego, Susana Narbona-Galdó, Antonio Jerez-Calero, María Del Carmen Augustín-Morales
The objective of this study was to analyze circadian patterns of urinary 6-sulphatoxymelatonin (aMT6s) excretion in children with primary sleep disorders in comparison with healthy controls. A total of 124 control children and 124 patients (aged 4-14 years) diagnosed with diverse primary sleep disorders were recruited. aMT6s concentrations were measured in diurnal and nocturnal urine, as well as in 24-hour urine. aMT6s levels were significantly higher and showed significantly more evident circadian variations in the control group ( P < ...
October 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28911179/deciphering-the-function-of-the-blunt-circadian-rhythm-of-melatonin-in-the-newborn-lamb-impact-on-adrenal-and-heart
#10
Maria Seron-Ferre, Claudia Torres-Farfan, Francisco J Valenzuela, Sebastian Castillo-Galan, Auristela Rojas, Natalia Mendez, Henry Reynolds, Guillermo J Valenzuela, Anibal J Llanos
Neonatal lambs, as with human and other neonates, have low arrhythmic endogenous levels of melatonin for several weeks until they start their own pineal rhythm of melatonin production at approximately 2 weeks of life. During pregnancy, daily rhythmic transfer of maternal melatonin to the fetus has important physiological roles in sheep, nonhuman primates, and rats. This melatonin rhythm provides a circadian signal and also participates in adjusting the physiology of several organs in preparation for extrauterine life...
September 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28904507/adjunctive-melatonin-for-tardive-dyskinesia-in-patients-with-schizophrenia-a-meta-analysis
#11
Chen-Hui Sun, Wei Zheng, Xin-Hu Yang, Dong-Bin Cai, Chee H Ng, Gabor S Ungvari, Hai-Yan Li, Yu-Jie Wu, Yu-Ping Ning, Yu-Tao Xiang
BACKGROUND: Tardive dyskinesia (TD) is characterized by abnormal and involuntary movements. Importantly, TD could cause considerable personal suffering and social and physical disabilities. AIMS: This meta-analysis based on randomized controlled trials (RCTs) systematically assessed the therapeutic effect and tolerability of melatonin for TD in schizophrenia. METHODS: A computerized and systematical search of both Chinese (Wanfang Data, Chinese National Knowledge Infrastructure (CNKI), SINOMED) and English (PubMed, PsycINFO, Embase, Cochrane Library databases) databases, from their inception until June 8, 2017, was conducted by two independent authors...
June 25, 2017: Shanghai Archives of Psychiatry
https://www.readbyqxmd.com/read/28902159/exogenous-melatonin-alleviates-alkaline-stress-in-malus-hupehensis-rehd-by-regulating-the-biosynthesis-of-polyamines
#12
Xiaoqing Gong, Shuting Shi, Fangfang Dou, Yi Song, Fengwang Ma
Since melatonin was identified in plants decades ago, much attention has been devoted to discovering its role in plant science. There is still a great deal to learn about the functional importance of melatonin, as well as its functional mode. In this paper, we examine the role of melatonin treatment in the response of Malus hupehensis Rehd. to alkaline conditions. Stressed seedlings showed chlorosis and suppressed growth. However, this phenotype was ameliorated when 5 µM melatonin was added to the irrigation solution...
September 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28901737/melatonin-improves-cognitive-deficits-via-restoration-of-cholinergic-dysfunction-in-a-mouse-model-of-scopolamine-induced-amnesia
#13
Bai Hui Chen, Joon Ha Park, Dae Won Kim, Jinseu Park, Soo Young Choi, In Hye Kim, Jeong Hwi Cho, Tae-Kyeong Lee, Jae Chul Lee, Choong-Hyun Lee, In Koo Hwang, Young-Myeong Kim, Bing Chun Yan, Il-Jun Kang, Bich Na Shin, Yun Lyul Lee, Myoung Cheol Shin, Jun Hwi Cho, Young Joo Lee, Yong Hwan Jeon, Moo-Ho Won, Ji Hyeon Ahn
Melatonin is known to improve cognitive deficits and its functions have been studied in various disease models, including Alzheimer's disease. In this study, we investigated effects of melatonin on cognition and the cholinergic system of the septum and hippocampus in a mouse model of scopolamine-induced amnesia. Scopolamine (1 mg/kg) and melatonin (10 mg/kg) were administered intraperitoneally to mice for 2 and 4 weeks. The Morris water maze and passive avoidance tests revealed that both treatments of scopolamine significantly impaired spatial learning and memory; however, 2- and 4-week melatonin treatments significantly improved the spatial learning and memory...
September 13, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28901278/neuroinflammation-and-the-immune-kynurenine-pathway-in-anxiety-disorders
#14
Yong-Ku Kim, Sang Won Jeon
BACKGROUND: Recently, neuroinflammation and the immune-kynurenine pathway have received increased attention in the psychoimmunology field of major depressive disorder (MDD), while studies related to anxiety disorders have been very limited. OBJECTIVE: This study reviewed possible mechanisms by which stress or inflammation modulate anxiety through tryptophan metabolism and the kynurenine pathway. METHOD: Relevant literature was identified through a search of MEDLINE via PubMed...
September 12, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28899330/rem-sleep-behaviour-disorder-not-just-a-bad-dream
#15
REVIEW
Elie Matar, Simon Jg Lewis
Rapid eye movement (REM) sleep behaviour disorder (RBD) is a parasomnia characterised by the loss of the normal atonia during the REM stage of sleep, resulting in overt motor behaviours that usually represent the enactment of dreams. Patients will seek medical attention due to sleep-related injuries or unpleasant dream content. Idiopathic RBD which occurs independently of any other disease occurs in up to 2% of the older population. Meanwhile, secondary RBD is very common in association with certain neurodegenerative conditions...
September 18, 2017: Medical Journal of Australia
https://www.readbyqxmd.com/read/28898928/importance-of-the-second-extracellular-loop-for-melatonin-mt1-receptor-function-and-absence-of-melatonin-binding-in-gpr50
#16
Nathalie Clement, Nicolas Renault, Jean-Luc Guillaume, Erika Cecon, Anne-Sophie Journé, Xavier Laurent, Kenjiro Tadagaki, Francis Cogé, Arnaud Gohier, Philippe Delagrange, Philippe Chavatte, Ralf Jockers
BACKGROUND AND PURPOSE: Recent crystal structures of G protein-coupled receptors (GPCRs) highlight the previously unappreciated role of the 2(nd) extracellular (E2) loop in ligand binding and gating and receptor activation. Here we studied the role of the E2 loop in the activation of the melatonin MT1 receptor (MT1 ) and in the inactivation of the closely related orphan GPR50 receptor. EXPERIMENTAL APPROACH: Chimeric MT1 -GPR50 receptors were generated and analyzed for 2-[(125) I]iodomelatonin binding, Gi /cAMP signaling and β-arrestin 2 recruitment assisted by computational molecular dynamics (MD) simulations...
September 12, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28895895/effects-of-sleep-quality-on-melatonin-levels-and-inflammatory-response-after-major-abdominal-surgery-in-an-intensive-care-unit
#17
Necdet Fatih Yaşar, Bartu Badak, Ağgül Canik, Sema Şanal Baş, Sema Uslu, Setenay Öner, Ersin Ateş
Disruption of nocturnal sleep in an intensive care unit may remarkably affect production of melatonin, which is also known to have anti-inflammatory properties. In the present study, we aimed to investigate the effect of sleep quality on melatonin levels and inflammation after surgery. Thus, we compared the patients, who were screened in the side-rooms where the lights were dimmed and noise levels were reduced, with the patients who received usual care. Preoperative and postoperative urine 6-sulphatoxymelatonin, serum interleukin-1 (IL-1), interleukin-6 (IL-6), and c-reactive protein (CRP) levels were measured and data on sleep quality was collected using the Richards-Campbell Sleep Questionnaire...
September 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28894915/chronobiological-theories-of-mood-disorder
#18
Nevin F W Zaki, David Warren Spence, Ahmed S BaHammam, Seithikurippu R Pandi-Perumal, Daniel P Cardinali, Gregory M Brown
Major depressive disorder (MDD) remains the most prevalent mental disorder and a leading cause of disability, affecting approximately 100 million adults worldwide. The disorder is characterized by a constellation of symptoms affecting mood, anxiety, neurochemical balance, sleep patterns, and circadian and/or seasonal rhythm entrainment. However, the mechanisms underlying the association between chronobiological parameters and depression remain unknown. A PubMed search was conducted to review articles from 1979 to the present, using the following search terms: "chronobiology," "mood," "sleep," and "circadian rhythms...
September 11, 2017: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/28894150/melatonin-enhances-the-developmental-competence-of-porcine-somatic-cell-nuclear-transfer-embryos-by-preventing-dna-damage-induced-by-oxidative-stress
#19
Shuang Liang, Yong-Xun Jin, Bao Yuan, Jia-Bao Zhang, Nam-Hyung Kim
Melatonin has antioxidant and scavenger effects in the cellular antioxidant system. This research investigated the protective effects and underlying mechanisms of melatonin action in porcine somatic cell nuclear transfer (SCNT) embryos. The results suggested that the developmental competence of porcine SCNT embryos was considerably enhanced after melatonin treatment. In addition, melatonin attenuated the increase in reactive oxygen species levels induced by oxidative stress, the decrease in glutathione levels, and the mitochondrial dysfunction...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28889229/melatonin-alleviates-inflammation-induced-apoptosis-in-human-umbilical-vein-endothelial-cells-via-suppression-of-ca-2-xo-ros-drp1-mitochondrial-fission-axis-by-activation-of-ampk-serca2a-pathway
#20
Jiasen Cui, Zeng Li, Shunjiu Zhuang, Shaohong Qi, Li Li, Junwen Zhou, Wan Zhang, Yun Zhao
Endothelia inflammation damage is vital to the development and progression of chronic venous disease. In the present study, we explored the protective effect of melatonin on endothelia apoptosis induced by LPS, particularly focusing on the mitochondrial fission. We demonstrated that human umbilical vein endothelial cells (HUVEC) subjected to LPS for 12 h exhibited a higher apoptotic rate. However, melatonin (1-20 μM) treatment 12 h before LPS had the ability to protect HUVEC cell against LPS-mediated apoptosis in a dose-dependent manner...
September 9, 2017: Cell Stress & Chaperones
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