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https://www.readbyqxmd.com/read/27932976/melatonin-and-nitrones-as-potential-therapeutic-agents-for-stroke
#1
Alejandro Romero, Eva Ramos, Paloma Patiño, Maria J Oset-Gasque, Francisco López-Muñoz, José Marco-Contelles
Stroke is a disease of aging affecting millions of people worldwide, and recombinant tissue-type plasminogen activator (r-tPA) is the only treatment approved. However, r-tPA has a low therapeutic window and secondary effects which limit its beneficial outcome, urging thus the search for new more efficient therapies. Among them, neuroprotection based on melatonin or nitrones, as free radical traps, have arisen as drug candidates due to their strong antioxidant power. In this Perspective article, an update on the specific results of the melatonin and several new nitrones are presented...
2016: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/27929185/melatonin-and-hydroxytyrosol-protect-against-oxidative-stress-related-to-the-central-nervous-system-after-the-ingestion-of-three-types-of-wine-by-healthy-volunteers
#2
Javier Marhuenda, Sonia Medina, Pedro Martínez-Hernández, Simón Arina, Pilar Zafrilla, Juana Mulero, Camille Oger, Jean-Marie Galano, Thierry Durand, Federico Ferreres, Angel Gil-Izquierdo
Adrenic acid (AdA) and docosahexaenoic acid (DHA) peroxidation produces F2-dihomo-IsoPs and neuroprostanes, which have been related to oxidative damage in the central nervous system. Besides polyphenols, melatonin (MEL) and hydroxytyrosol (OHTyr) could be partly responsible for the antioxidant benefits of red wine (excluding colon derivatives). In order to elucidate whether these compounds are responsible for the protective antioxidant effects of red wine, a double-blind, crossover, placebo-controlled in vivo study - involving the intake of red wines and their native musts by healthy volunteers - was performed...
December 8, 2016: Food & Function
https://www.readbyqxmd.com/read/27927701/melatonin-for-cardioprotection-in-st-elevation-myocardial-infarction-are-we-ready-for-the-challenge
#3
EDITORIAL
Alberto Dominguez-Rodriguez, Pedro Abreu-Gonzalez, Russel J Reiter
No abstract text is available yet for this article.
December 7, 2016: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/27923708/acth-modulation-on-corticosterone-melatonin-testosterone-and-innate-immune-response-in-the-tree-frog-hypsiboas-faber
#4
Adriana Maria Giorgi Barsotti, Vania Regina de Assis, Stefanny Christie Monteiro Titon, Braz Titon Junior, Zulma Felisbina da Silva Ferreira, Fernando Ribeiro Gomes
The modulation exerted by glucocorticoids in physiological responses to stressors is essential for maintaining short-term homeostasis. However, highly frequent and/or prolonged activation of the hypothalamic-pituitary-adrenal/interrenal axis may inhibit processes that are important to long-term fitness and health, including reproduction and immunocompetence. The present study evaluates the response to adrenocorticotropic hormone (ACTH) injection in the adult male tree frog, Hypsiboas faber, as indicated by levels of plasma corticosterone (CORT), plasma testosterone (T), ocular melatonin (MEL), hematocrit and immune functioning (total leukocyte count and bacterial killing ability against Escherichia coli)...
December 3, 2016: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/27923552/preleukaemic-clonal-haemopoiesis-and-risk-of-therapy-related-myeloid-neoplasms-a-case-control-study
#5
Koichi Takahashi, Feng Wang, Hagop Kantarjian, Denaha Doss, Kanhav Khanna, Erika Thompson, Li Zhao, Keyur Patel, Sattva Neelapu, Curtis Gumbs, Carlos Bueso-Ramos, Courtney D DiNardo, Simona Colla, Farhad Ravandi, Jianhua Zhang, Xuelin Huang, Xifeng Wu, Felipe Samaniego, Guillermo Garcia-Manero, P Andrew Futreal
BACKGROUND: Therapy-related myeloid neoplasms are secondary malignancies that are often fatal, but their risk factors are not well understood. Evidence suggests that individuals with clonal haemopoiesis have increased risk of developing haematological malignancies. We aimed to identify whether patients with cancer who have clonal haemopoiesis are at an increased risk of developing therapy-related myeloid neoplasms. METHODS: We did this retrospective case-control study to compare the prevalence of clonal haemopoiesis between patients treated for cancer who later developed therapy-related myeloid neoplasms (cases) and patients who did not develop these neoplasms (controls)...
December 2, 2016: Lancet Oncology
https://www.readbyqxmd.com/read/27921018/comparison-of-the-protective-effects-of-erythropoietin-and-melatonin-on-renal-ischemia-reperfusion-injury
#6
Shokofeh Banaei, Nasser Ahmadiasl, Alireza Alihemmati
BACKGROUND: Renal ischemia-reperfusion (IR) contributes to the development of acute renal failure (ARF). Oxygen free radicals are considered to be the principal components involved in the pathophysiological tissue alterations observed during renal IR. OBJECTIVES: In this study, we compared the effects of melatonin (MEL) and erythropoietin (EPO), both known antioxidant and anti-inflammatory agents, on IR-induced renal injury in rats. MATERIALS AND METHODS: Wistar albino rats were unilaterally nephrectomized and then subjected to 45 minutes of renal pedicle occlusion followed by 24 hours of reperfusion...
July 2016: Trauma Monthly
https://www.readbyqxmd.com/read/27919824/melatonin-s-role-as-a-co-adjuvant-treatment-in-colonic-diseases-a-review
#7
REVIEW
Eduardo Esteban-Zubero, Laura López-Pingarrón, Moisés Alejandro Alatorre-Jiménez, Purificación Ochoa-Moneo, Celia Buisac-Ramón, Miguel Rivas-Jiménez, Silvia Castán-Ruiz, Ángel Antoñanzas-Lombarte, Dun-Xian Tan, José Joaquín García, Russel J Reiter
Melatonin is produced in the pineal gland as well as many other organs, including the enterochromaffin cells of the digestive mucosa. Melatonin is a powerful antioxidant that resists oxidative stress due to its capacity to directly scavenge reactive species, to modulate the antioxidant defense system by increasing the activities of antioxidant enzymes, and to stimulate the innate immune response through its direct and indirect actions. In addition, the dysregulation of the circadian system is observed to be related with alterations in colonic motility and cell disruptions due to the modifications of clock genes expression...
December 2, 2016: Life Sciences
https://www.readbyqxmd.com/read/27915492/preparation-and-in-vitro-evaluation-of-melatonin-loaded-ha-pva-gelformulations
#8
Sakine Tuncay Tanrıverdi, Catalina Natalia Cheaburu-Yilmaz, Sonia Carbone, Özgen Özer
Melatonin loaded hyaluronic acid and poly(vinyl alcohol) gels were prepared by using freeze-thaw technique and an emulsion method followed by freeze-thaw technique to produce a new synergistic system for topical application. Freeze-thaw hydrogels and emulgels were characterized by means of Fourier Transform Infrared Spectroscopy, rheology and swelling tests. The porous structure of the hydrogels was shown by scanning electron microscopy observations and thermal properties were tested by Differential Scanning Calorimetry measurements...
December 5, 2016: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/27914990/presence-of-melanopsin-in-human-crystalline-lens-epithelial-cells-and-its-role-in-melatonin-synthesis
#9
Hanan Awad Alkozi, Xiaoyu Wang, Maria Jesus Perez de Lara, Jesus Pintor
Melanopsin is a non-image forming photoreceptor known to be present in the retina and it is considered to have light regulated tasks among other functions. In the present work, melanopsin presence in human lens epithelial cells as well as in human lens tissue is described for the first time. Moreover, studying the concentration of melatonin and its synthesising enzyme AANAT proved a clear link between melanopsin activation and the suppression of melatonin synthesis. Melanopsin sensitivity to specific wavelength (465-480 nm, blue) was confirmed after making temporal studies incubating lens epithelial cells under light, red, green, blue and total darkness for 2, 4, 8, 12 h and analysing the concentration of both melatonin and its synthesising enzyme AANAT, discovering that melatonin levels after submitting cells to total darkness are significantly higher to ones submitted to white or specifically blue light (***p < 0...
November 30, 2016: Experimental Eye Research
https://www.readbyqxmd.com/read/27912116/application-of-melatonin-loaded-poly-n-isopropylacrylamide-hydrogel-particles-to-reduce-the-toxicity-of-airborne-pollutes-to-raw264-7-cells
#10
Wenjing Zhang, Pengfei Jiang, Jin Chen, Chaonan Zhu, Zhengwei Mao, Changyou Gao
The adverse effect of airborne PM2.5 pollutes on human beings and the environment, most likely due to heavy metal leaching, has received extensive attention recently. It is urgently required to develop a simple and effective method to suppress the toxicity of PM2.5 pollutes. In this study, the heavy metal content of PM2.5 pollutes around Zhejiang university were firstly identified. Their cytotoxicity was confirmed, by inducing significantly enhanced intracellular reactive oxygen species level. Poly(N-isopropylacrylamide) (PNIPAM) submicron hydrogel particles with tunable crosslinking densities and thermo-responsive swelling/shrinking properties were then prepared by adjusting the crosslinking density...
November 22, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27911044/utilization-of-stimulants-and-atomoxetine-for-attention-deficit-hyperactivity-disorder-among-5-4-million-children-using-population-based-longitudinal-data
#11
Kari Furu, Øystein Karlstad, Helga Zoega, Jaana E Martikainen, Shahram Bahmanyar, Helle Kieler, Anton Pottegård
Use of stimulants to treat Attention-deficit/hyperactivity disorder (ADHD) has increased over the past two decades and varies substantially between countries. The objective of this multinational population-based study was to examine utilization of ADHD drugs (stimulants and atomoxetine) including co-medication with other psychothropic drugs in the entire child population in the five Nordic countries. We included longitudinal data on dispensed ADHD drugs from five Nordic prescription registers during 2008-2012; which in 2012 comprised 48,296 individuals among 5...
December 2, 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27910708/myo-inositol-and-melatonin-in-the-menopausal-transition
#12
Rosario D'Anna, Angelo Santamaria, Grazia Giorgianni, Alberto Vaiarelli, Giuseppe Gullo, Flavia Di Bari, Salvatore Benvenga
INTRODUCTION: The aim of the study was to evaluate the effects on serum insulin and serum thyroid profile of a dietary supplement, myo-inositol, given alone or in combination with melatonin to women during menopausal transition. METHODS: Forty women aged 45-55 years and at least 6 months of amenorrhea were enrolled in this study. They were randomly assigned to two groups of 20 each. One group took myo-inositol (myo-Ins) (2 g twice a day) and the other group took 2 g/d myo-Ins plus 3 g/d melatonin before sleeping...
December 2, 2016: Gynecological Endocrinology
https://www.readbyqxmd.com/read/27909960/effects-of-melatonin-aluminum-oxide-and-polymethylsiloxane-complex-on-the-expression-of-lyve-1-in-the-liver-of-mice-with-obesity-and-type-2-diabetes-mellitus
#13
S V Michurina, I Yu Ishchenko, S A Arkhipov, V V Klimontov, L N Rachkovskaya, V I Konenkov, E L Zavyalov
The effects of melatonin, aluminum oxide, and polymethylsiloxane complex on the expression of LYVE-1 (lymphatic vessel endothelial hyaluronan receptor) in the liver were studied in db/db mice with experimental obesity and type 2 diabetes mellitus. The complex or placebo was administered daily by gavage from week 8 to week 16 of life. The animals receiving the complex exhibited enhanced, in comparison with the placebo group, immunohistochemical LYVE-1+ staining of endothelial cells in sinusoids. Enhanced expression of LYVE-1 was associated with less pronounced dilatation of interlobular arteries, veins, and lymphatic vessels...
December 1, 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27909592/effect-of-day-and-night-desflurane-anaesthesia-on-melatonin-levels-in-rats
#14
Figen Datlı Özer, Elvan Öçmen, Pınar Akan, Hale Aksu Erdost, Sezen Korkut, Ali Necati Gökmen
OBJECTIVE: The aim of this study is to investigate the effect of day and night administration of desflurane anaesthesia on melatonin levels in rats. METHODS: Twenty-four 15-day-old rats were included in the study and were divided into four groups. The rats were anaesthetised between 19:00-01:00 (night group) and 07:00-13:00 (day group) with 5.7% desflurane concentration in 6 L min(-1) 100% oxygen. 6 L min(-1) oxygen was administered to the control groups. At the end of 6 h of anaesthesia, blood samples were taken, and rats were sacrificed...
August 2016: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/27904735/urinary-metabolomics-of-young-italian-autistic-children-supports-abnormal-tryptophan-and-purine-metabolism
#15
Federica Gevi, Lello Zolla, Stefano Gabriele, Antonio M Persico
BACKGROUND: Autism spectrum disorder (ASD) is still diagnosed through behavioral observation, due to a lack of laboratory biomarkers, which could greatly aid clinicians in providing earlier and more reliable diagnoses. Metabolomics on human biofluids provides a sensitive tool to identify metabolite profiles potentially usable as biomarkers for ASD. Initial metabolomic studies, analyzing urines and plasma of ASD and control individuals, suggested that autistic patients may share some metabolic abnormalities, despite several inconsistencies stemming from differences in technology, ethnicity, age range, and definition of "control" status...
2016: Molecular Autism
https://www.readbyqxmd.com/read/27904671/melatonin-promotes-diabetic-wound-healing-in-vitro-by-regulating-keratinocyte-activity
#16
Ruipeng Song, Lijun Ren, Haoli Ma, Ruijing Hu, Honghong Gao, Li Wang, Xuehui Chen, Zhigang Zhao, Jialin Liu
Diabetic patients are at high risk of developing delayed cutaneous wound healing. Proper keratinocyte proliferation and migration are crucial steps during re-epithelialization. Melatonin (Mel) accelerates wound repair in full-thickness incisional wounds; however, its role in diabetic wound healing is unknown. This study explored the role of Mel in diabetic wound healing in vitro by using high glucose (HG)-cultured keratinocytes. Mel reduced the HG-induced mRNA expression and release of pro-inflammatory cytokines, including tumor necrosis factor-α, interleukin (IL)-1β, IL-6, and IL-8, in keratinocytes...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27900599/melatonin-attenuates-manganese-and-lipopolysaccharide-induced-inflammatory-activation-of-bv2-microglia
#17
Euteum Park, Hong Sung Chun
Melatonin, a naturally occurring neurohormone in the pineal gland, has been shown to exert antioxidant and anti-inflammatory effects. This study examined the effects of melatonin on manganese (Mn) and/or lipopolysaccharide (LPS)-induced microglial activation. Melatonin (10 μM) inhibited Mn (100 μM) and/or LPS (0.5 μg/ml)-induced phagocytotic activity of activated BV2 microglia. It also inhibited the lipid peroxidation and intracellular reduced glutathione (GSH) depletion induced by Mn and/or LPS. Melatonin effectively suppressed the upregulation of interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) at both mRNA and protein levels in Mn and/or LPS-stimulated BV2 microglia...
November 30, 2016: Neurochemical Research
https://www.readbyqxmd.com/read/27899931/melatonin-in-plants-and-plant-culture-systems-variability-stability-and-efficient-quantification
#18
Lauren A E Erland, Abhishek Chattopadhyay, Andrew Maxwell P Jones, Praveen K Saxena
Despite growing evidence of the importance of melatonin and serotonin in the plant life, there is still much debate over the stability of melatonin, with extraction and analysis methods varying greatly from lab to lab with respect to time, temperature, light levels, extraction solvents, and mechanical disruption. The variability in methodology has created conflicting results that confound the comparison of studies to determine the role of melatonin in plant physiology. We here describe a fully validated method for the quantification of melatonin, serotonin and their biosynthetic precursors: tryptophan, tryptamine and N-acetylserotonin by liquid chromatography single quadrupole mass spectrometry (LC-MS) in diverse plant species and tissues...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27899698/illuminating-a-risk-for-breast-cancer-a-preliminary-ecological-study-on-the-association-between-streetlight-and-breast-cancer
#19
Atalya Keshet-Sitton, Keren Or-Chen, Eran Huber, Abraham Haim
Artificial light at night (ALAN) for elongating photophase is a new source of pollution. We examined the association between measured ALAN levels and breast cancer (BC) standard morbidity ratio (SMR) at a statistical area (SA) level in an urban environment. Sample size consisted of 266 new BC cases ages 35-74. Light measurements (lux) were performed in 11 SAs. A new calculated variable of morbidity per SA size (SMR35-74/km(2)) was correlated with the light variables per road length, using Pearson correlations (P < ...
November 29, 2016: Integrative Cancer Therapies
https://www.readbyqxmd.com/read/27899301/role-for-nf-%C3%AE%C2%BAb-inflammatory-signalling-pathway-in-tenofovir-disoproxil-fumarate-tdf-induced-renal-damage-in-rats
#20
Hemalatha Ramamoorthy, Premila Abraham, Bina Isaac, Dhayakani Selvakumar
Nephrotoxicity due to tenofovir treatment of HIV patients has been reported. However, the mechanism of tenofovir nephrotoxicity is not clear. NFκB is an important proinflammatory transcription factor that plays a pivotal role in oxidative stress-induced inflammation. We hypothesized that NFκB proinflammatory signalling pathway may play a role in tenofovir induced renal damage. Renal damage was induced in adult male Wistar rats by the oral administration of 600 mg/kg body wt. daily for 5 consecutive weeks...
November 27, 2016: Food and Chemical Toxicology
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