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https://www.readbyqxmd.com/read/28088671/melatonin-attenuates-titanium-particle-induced-osteolysis-via-activation-of-wnt-%C3%AE-catenin-signaling-pathway
#1
Zichuan Ping, Xuanyang Hu, Liangliang Wang, Jiawei Shi, Yunxia Tao, Xiexing Wu, Zhenyang Hou, Xiaobin Guo, Wen Zhang, Huilin Yang, Yaozeng Xu, Zhirong Wang, Dechun Geng
: Wear debris-induced inhibition of bone regeneration and extensive bone resorption were common features in peri-prosthetic osteolysis (PPO). Here, we investigated the effect of melatonin on titanium particle-stimulated osteolysis in a murine calvariae model and mouse-mesenchymal-stem cells (mMSCs) culture system. Melatonin inhibited titanium particle-induced osteolysis and increased bone formation at osteolytic sites, confirmed by radiological and histomorphometric data. Furthermore, osteoclast numbers decreased dramatically in the low- and high-melatonin administration mice, as respectively, compared with the untreated animals...
January 11, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28088019/melatonin-and-resveratrol-reverse-the-toxic-effect-of-high-boron-b-and-modulate-biochemical-parameters-in-pepper-plants-capsicum-annuum-l
#2
Eleana Sarafi, Pavlos Tsouvaltzis, Christos Chatzissavvidis, Anastasios Siomos, Ioannis Therios
The objectives of this research were to test a possible involvement of melatonin (MEL) and resveratrol (RES) in restoring growth and to control boron (B) toxicity in peppers. The plants were subjected to four different nutrient solution treatments as following: 1) half-strength Hoagland's nutrient solution (Control), 2) half-strength Hoagland's nutrient solution+100 μM B (100 μMB), 3) half-strength Hoagland's nutrient solution+100 μM boron+100 μMresveratrol (100 μMRES), and 4) half-strength Hoagland's nutrient solution+100 μM B+1 μMmelatonin (1 μM MEL)...
December 23, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28075519/an-update-of-management-of-insomnia-in-patients-with-chronic-orofacial-pain
#3
REVIEW
Galit Almoznino, Yaron Haviv, Yair Sharav, Rafael Benoliel
In this review we discuss the management of chronic orofacial pain (COFP) patients with insomnia. Diagnostic work-up and follow-up routines of COFP patients should include assessment of sleep problems. Management is based on a multidisciplinary approach, addressing the factors that modulate the pain experience as well as insomnia and including both non-pharmacological and pharmacological modalities. Parallel to treatment, patients should receive therapy for co-morbid medical and psychiatric disorders, and possible substance abuse that may be that may trigger or worsen the COFP and/or their insomnia...
January 11, 2017: Oral Diseases
https://www.readbyqxmd.com/read/28070878/effects-of-caffeic-acid-and-quercetin-on-in-vitro-permeability-metabolism-and-in-vivo-pharmacokinetics-of-melatonin-in-rats-potential-for-herb-drug-interaction
#4
Snehasis Jana, Himanshu Rastogi
BACKGROUND AND OBJECTIVES: Melatonin is a popular dietary supplement and also considered as pharmaceutical product for sleep disorders. Caffeic acid and quercetin are widely distributed in leafy vegetables, fruits, tea extract, and both are used as natural antioxidant. There is an immense concern for health researchers to study the herb/food-drug interactions of melatonin. It is mainly metabolized by CYP1A2 in human so that herbs/foods containing cytochrome P450 (CYP) inhibitors can affect pharmacokinetics of melatonin...
January 9, 2017: European Journal of Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/28070110/melatonin-suppresses-methamphetamine-triggered-endoplasmic-reticulum-stress-in-c6-cells-glioma-cell-lines
#5
Wanida Tungkum, Pichaya Jumnongprakhon, Chainarong Tocharus, Piyarat Govitrapong, Jiraporn Tocharus
Methamphetamine (METH) is a neurotoxic drug that causes brain damage by inducing neuronal and glial cell death together with glial cell hyperactivity-mediated progressive neurodegeneration. Previous studies have shown that METH induced glial cell hyperactivity and death via oxidative stress, the inflammatory response, and endoplasmic reticulum stress (ER stress) mechanisms, and melatonin could reverse these effects. However, the exact mechanism of the protective role of melatonin in METH-mediated ER stress has not been understood...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/28069827/melatonin-mediated-upregulation-of-glut1-blocks-exit-from-pluripotency-by-increasing-the-uptake-of-oxidized-vitamin-c-in-mouse-embryonic-stem-cells
#6
Haibo Wu, Chao Song, Jingcheng Zhang, Jiamin Zhao, Beibei Fu, Tingchao Mao, Yong Zhang
Melatonin and vitamin C are powerful antioxidants that improve the reprogramming efficiency of induced pluripotent stem cells (iPSCs). However, the effects of the combined treatment of vitamin C and melatonin on the differentiation of embryonic stem cells (ESCs) have not yet been examined. In this study, we showed that melatonin synergizes with vitamin C to derail exit from pluripotency of mouse ESCs. This effect is related to the increased uptake of dehydroascorbate, the oxidized form of vitamin C, through glucose transporter 1 (Glut1) transporter, which in turn, is upregulated by melatonin treatment...
January 9, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28065781/ischemic-brain-injury-new-insights-on-the-protective-role-of-melatonin
#7
REVIEW
Eva Ramos, Paloma Patiño, Russel J Reiter, Emilio Gil-Martín, José Marco-Contelles, Esther Parada, Cristobal de Los Rios, Alejandro Romero, Javier Egea
Stroke represents one of the most common causes of brain's vulnerability for many millions of people worldwide. The plethora of physiopathological events associated with brain ischemia are regulate through multiple signaling pathways leading to the activation of oxidative stress process, Ca(2+) dyshomeostasis, mitochondrial dysfunction, proinflammatory mediators, excitotoxicity and/or programmed neuronal cell death. Understanding this cascade of molecular events is mandatory in order to develop new therapeutic strategies for stroke...
January 6, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28065420/effectiveness-of-dietary-supplements-in-spinal-cord-injury-subjects
#8
REVIEW
Angela Navarrete-Opazo, Pilar Cuitiño, Inés Salas
BACKGROUND: Individuals with spinal cord injury (SCI) consume more dietary supplements than the general population. However, there is limited information regarding the clinical effectiveness of dietary supplements in SCI population. OBJECTIVE: To systematically review the effectiveness of dietary supplements for the prevention or treatment of health-related conditions associated with SCI. METHODS: Randomized or non-randomized controlled clinical trials were selected, comparing the effect of any dose and form of a dietary supplement (defined by the Dietary Supplement Health and Education Act), with either no treatment, placebo, or other medication...
December 19, 2016: Disability and Health Journal
https://www.readbyqxmd.com/read/28064405/a-systematic-review-of-circadian-function-chronotype-and-chronotherapy-in-attention-deficit-hyperactivity-disorder
#9
REVIEW
Andrew N Coogan, Niall M McGowan
Reports of sleep disturbances in attention deficit hyperactivity disorder (ADHD) are common in both children and adults; however, the aetiology of such disturbances is poorly understood. One potentially important mechanism which may be implicated in disrupted sleep in ADHD is the circadian CLOCK, a known key regulator of the sleep/wake cycle. In this systematic review, we analyse the evidence for circadian rhythm changes associated with ADHD, as well as assessing evidence for therapeutic approaches involving the circadian CLOCK in ADHD...
January 7, 2017: Attention Deficit and Hyperactivity Disorders
https://www.readbyqxmd.com/read/28063410/the-impact-of-different-extracellular-matrices-on-melatonin-effect-in-proliferation-and-stemness-properties-of-ovarian-cancer-cells
#10
Maryam Akbarzadeh, Reza Rahbarghazi, Elahe Nabat, Ali Akbar Movassaghpour, Daruish Shanehbandi, Behnaz Faramarzian Azimi Maragheh, Danial Matluobi, Balal Barazvan, Masoume Kazemi, Nasser Samadi, Mohammad Nouri
AIM: Endogenous melatonin has numerous physiological roles on modulating the function of different organs. Recent studies revealed oncostatic and protective effects of this molecule on tumor development. In this study, we examined the impact of melatonin and key underlying mechanisms on stemness, morphology, invasiveness and viability of SKOV3 ovarian cancer cells in different types of extracellular matrix. METHODS: Cell viability was evaluated by MTT Assay. Colony-forming assay was performed by seeding 4×10(3) cells on different matrices in six well-plate...
January 4, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28062641/melatonin-levels-in-follicular-fluid-as-markers-for-ivf-outcomes-and-predicting-ovarian-reserve
#11
Jing Tong, Shi-le Sheng, Yun Sun, Huihui Li, Wei-Ping Li, Cong Zhang, Zijiang Chen
Good-quality oocytes are critical for the success of in vitro fertilization (IVF), but, to date, there is no marker of ovarian reserve available that can accurately predict oocyte quality. Melatonin exerts its antioxidant actions as a strong radical scavenger that might affect oocyte quality directly, since it is the most potent antioxidant in follicular fluid. To investigate the precise role of endogenous melatonin in IVF outcomes, we recruited 61 women undergoing treatment cycles of IVF or intracytoplasmic sperm injection (ICSI) procedures and classified them into three groups according to their response to ovarian stimulation...
January 6, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28061973/the-melatonergic-system-in-anxiety-disorders-and-the-role-of-melatonin-in-conditional-fear
#12
F Huang, Z Yang, C-Q Li
BACKGROUND: Resistance to extinction of certain conditioned responses forms the basis of anxieties, phobias, and compulsions. There has been an available effective means of extinction-based exposure psychotherapy for the treatment of anxiety disorders, such as posttraumatic stress disorder (PTSD) that has been hypothesized to result from impaired extinction of fear memory. PTSD is considered as a memory disorder within a Pavlovian fear conditioning and extinction framework. Therefore, the aim of this review was to report the preclinical profile of melatonin, a pineal gland hormone, as a potential pharmacological option in the treatment of anxiety disorders such as PTSD, tested with the Pavlovian fear conditioning paradigm...
2017: Vitamins and Hormones
https://www.readbyqxmd.com/read/28061873/prophylactic-melatonin-for-delirium-in-intensive-care-pro-medic-study-protocol-for-a-randomised-controlled-trial
#13
F Eduardo Martinez, Matthew Anstey, Andrew Ford, Brigit Roberts, Miranda Hardie, Robert Palmer, Lynn Choo, David Hillman, Michael Hensley, Erin Kelty, Kevin Murray, Bhajan Singh, Bradley Wibrow
BACKGROUND: Delirium is an acute state of brain dysfunction characterised by fluctuating inattention and cognitive disturbances, usually due to illness. It occurs commonly in the intensive care unit (ICU), and it is associated with greater morbidity and mortality. It is likely that disturbances of sleep and of the day-night cycle play a significant role. Melatonin is a naturally occurring, safe and cheap hormone that can be administered to improve sleep. The main aim of this trial will be to determine whether prophylactic melatonin administered to critically ill adults, when compared with placebo, decreases the rate of delirium...
January 6, 2017: Trials
https://www.readbyqxmd.com/read/28060541/response-to-kennaway-et-al-comment-on-the-study-school-start-time-influences-melatonin-and-cortisol-levels-in-children-and-adolescents-a-community-based-study
#14
Alicia Carissimi, Lilian Corrêa da Silva, Cristian Patrick Zeni, Maria Paz Hidalgo
No abstract text is available yet for this article.
January 6, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28054350/daily-variation-of-uv-induced-erythema-and-the-action-of-solar-filters
#15
Ana Flo, Ana C Calpena, Antoni Díez-Noguera, Alfons Del Pozo, Trinitat Cambras
UV rays may cause several degrees of skin damage, which makes sunscreen research necessary. In addition, skin sensitivity shows daily variations, which can interfere in the detection of the efficacy of the filters. Here, we studied the UV-induced erythema in hairless rats at two times of the day (light and darkness) using a colorimeter method. The effect of an emulsion with solar filters with or without melatonin was also assayed. Results indicate that the value of a* (from CIELAB color space values L* a* b) was the most useful variable to evaluate the erythema...
November 16, 2016: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28052641/protective-effects-of-melatonin-on-the-activity-of-sod-cat-gsh-px-and-gsh-content-in-organs-of-mice-after-administration-of-snp
#16
Zofia Goc, Waldemar Szaroma, Edyta Kapusta, Karol Dziubek
Sodium nitroprusside (SNP) is an antihypertensive drug with proven dose-dependent toxic effects attributed mainly to the production of cyanide but also excesive nitric oxide (NO) and derived reactive species. The present study evaluated whether melatonin administration would have time-dependent protective effect against SNP−induced toxicity. Male Swiss mice were used in this study. Control mice were treated with 0.9% NaCl; the second group was injected with 10 mg melatonin (MEL)/kg body weight (b.w.); the third group was given SNP at the dose of 3,6 mg/kg b...
28, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28050233/signaling-transcript-profile-of-the-asexual-intraerythrocytic-development-cycle-of-plasmodium-falciparum-induced-by-melatonin-and-camp
#17
Wânia Rezende Lima, Giulliana Tessarin-Almeida, Andrei Rozanski, Kleber S Parreira, Miriam S Moraes, David C Martins, Ronaldo F Hashimoto, Pedro A F Galante, Célia R S Garcia
According to the World Health Organization (WHO), Plasmodium falciparum is the deadliest parasite among all species. This parasite possesses the ability to sense molecules, including melatonin (MEL) and cAMP, and modulate its cell cycle accordingly. MEL synchronizes the development of this malaria parasite by activating several cascades, including the generation of the second messenger cAMP. Therefore, we performed RNA sequencing (RNA-Seq) analysis in P. falciparum erythrocytic stages (ring, trophozoite and schizont) treated with MEL and cAMP...
September 2016: Genes & Cancer
https://www.readbyqxmd.com/read/28045969/blue-light-filtering-spectacle-lenses-optical-and-clinical-performances
#18
Tsz Wing Leung, Roger Wing-Hong Li, Chea-Su Kee
PURPOSES: To evaluate the optical performance of blue-light filtering spectacle lenses and investigate whether a reduction in blue light transmission affects visual performance and sleep quality. METHODS: Experiment 1: The relative changes in phototoxicity, scotopic sensitivity, and melatonin suppression of five blue-light filtering plano spectacle lenses were calculated based on their spectral transmittances measured by a spectrophotometer. Experiment 2: A pseudo-randomized controlled study was conducted to evaluate the clinical performance of two blue-light filtering spectacle lenses (BF: blue-filtering anti-reflection coating; BT: brown-tinted) with a regular clear lens (AR) serving as a control...
2017: PloS One
https://www.readbyqxmd.com/read/28045095/improved-cold-tolerance-in-elymus-nutans-by-exogenous-application-of-melatonin-may-involve-aba-dependent-and-aba-independent-pathways
#19
Juanjuan Fu, Ye Wu, Yanjun Miao, Yamei Xu, Enhua Zhao, Jin Wang, Huaien Sun, Qian Liu, Yongwei Xue, Yuefei Xu, Tianming Hu
Melatonin is an important secondary messenger that plays a central role in plant growth, as well as abiotic and biotic stress tolerance. However, the underlying physiological and molecular mechanisms of melatonin-mediated cold tolerance, especially interactions between melatonin and other key molecules in the plant stress response, remain unknown. Here, the interrelation between melatonin and abscisic acid (ABA) was investigated in two genotypes of Elymus nutans Griseb., the cold-tolerant Damxung (DX) and the cold-sensitive Gannan (GN) under cold stress...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28042611/bedtime-and-evening-light-exposure-influence-circadian-timing-in-preschool-age-children-a-field-study
#20
Lameese D Akacem, Kenneth P Wright, Monique K LeBourgeois
Light exposure and sleep timing are two factors that influence inter-individual variability in the timing of the human circadian clock. The aim of this study was to quantify the degree to which evening light exposure predicts variance in circadian timing over and above bedtime alone in preschool children. Participants were 21 children ages 4.5-5.0 years (4.7 ± 0.2 years; 9 females). Children followed their typical sleep schedules for 4 days during which time they wore a wrist actigraph to assess sleep timing and a pendant light meter to measure minute-by-minute illuminance levels in lux...
November 2016: Neurobiology of Sleep and Circadian Rhythms
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