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Mechanism placebo effect

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https://www.readbyqxmd.com/read/29675956/clonidine-modulates-the-activity-of-the-subthalamic-supplementary-motor-loop-evidence-from-a-pharmacological-study-combining-dbs-and-eeg-recordings-in-parkinsonian-patients
#1
Charlotte Spay, Marion Albares, Guillaume Lio, Stephane Thobois, Emmanuel Broussolle, Brian Lau, Benedicte Ballanger, Philippe Boulinguez
Clonidine is an anti-hypertensive medication which acts as an alpha-adrenergic receptors agonist. As the noradrenergic system is likely to support cognitive functions including attention and executive control, other clinical uses of clonidine have recently gained popularity for the treatment of neuropsychiatric disorders like attention-deficit hyperactivity disorder or Tourette syndrome, but the mechanism of action is still unclear. Here, we test the hypothesis that the noradrenergic system regulates the activity of subthalamo-motor cortical loops, and that this influence can be modulated by clonidine...
April 20, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29674270/response-inhibition-and-emotional-cognition-improved-by-atomoxetine-in-children-and-adolescents-with-adhd-the-action-randomized-controlled-trial
#2
Kristi R Griffiths, John E Leikauf, Tracey W Tsang, Simon Clarke, Daniel F Hermens, Daryl Efron, Leanne M Williams, Michael R Kohn
Although the non-stimulant medication atomoxetine is effective for attention-deficit hyperactivity disorder (ADHD) in children and adolescents, there are still significant gaps in our knowledge about whether atomoxetine improves anxiety symptoms or cognition in children. Furthermore, while cognition has been proposed as an intermediate phenotype for ADHD dysfunction, the relationships between clinical and cognitive outcomes are not yet understood. We addressed these knowledge gaps in a controlled trial using objective assessments of both general and emotional cognitive functions implicated in ADHD and in anxiety, which commonly co-occurs with ADHD...
March 27, 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29672527/pure-flavonoid-epicatechin-and-whole-genome-gene-expression-profiles-in-circulating-immune-cells-in-adults-with-elevated-blood-pressure-a-randomised-double-blind-placebo-controlled-crossover-trial
#3
Diederik Esser, Johanna M Geleijnse, Juri C Matualatupauw, James I Dower, Daan Kromhout, Peter C H Hollman, Lydia A Afman
Cocoa consumption has beneficial cardiometabolic effects, but underlying mechanisms remain unclear. Epicatechin, the cocoa major monomeric flavan-3-ol, is considered to contribute to these cardio-protective effects. We investigated effects of pure epicatechin supplementation on gene expression profiles of immune cells in humans. In a double blind, placebo-controlled cross-over trial, 32 (pre)hypertensive subjects aged 30 to 80, received two 4-week interventions, i.e. epicatechin (100mg/day) or placebo with a 4-week wash-out between interventions...
2018: PloS One
https://www.readbyqxmd.com/read/29672184/oral-supplementation-with-beta-hydroxy-beta-methylbutyrate-arginine-and-glutamine-improves-lean-body-mass-in-healthy-older-adults
#4
Amy C Ellis, Gary R Hunter, Amy M Goss, Barbara A Gower
Oral intake of beta-hydroxy-beta-methylbutyrate (HMB), arginine, and glutamine may ameliorate muscle loss by stimulating protein synthesis and decreasing protein degradation while simultaneously decreasing inflammation. Previous studies provide evidence for improvement in body composition with dietary supplementation of these ingredients among patients with muscle-wasting diseases. The objectives of this study were to examine the effects of this amino acid mixture on lean body mass, muscle volume, and physical function among healthy older adults...
April 19, 2018: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/29671041/oropharyngeal-and-nasopharyngeal-decontamination-with-chlorhexidine-gluconate-in-lung-cancer-surgery-a-randomized-clinical-trial
#5
Xavier Benoit D'Journo, Pierre-Emmanuel Falcoz, Marco Alifano, Jean-Philippe Le Rochais, Thomas D'Annoville, Gilbert Massard, Jean Francois Regnard, Philippe Icard, Charles Marty-Ane, Delphine Trousse, Christophe Doddoli, Bastien Orsini, Sophie Edouard, Matthieu Million, Nathalie Lesavre, Anderson Loundou, Karine Baumstarck, Florence Peyron, Stephane Honoré, Stéphanie Dizier, Aude Charvet, Marc Leone, Didier Raoult, Laurent Papazian, Pascal Alexandre Thomas
PURPOSE: Respiratory complications are the leading causes of morbidity and mortality after lung cancer surgery. We hypothesized that oropharyngeal and nasopharyngeal decontamination with chlorhexidine gluconate (CHG) would be an effective method to reduce these complications as reported in cardiac surgery. METHODS: In this multicenter parallel-group randomized double-blind placebo-controlled trial, we enrolled consecutive adults scheduled for anatomical pulmonary resection for lung cancer...
April 18, 2018: Intensive Care Medicine
https://www.readbyqxmd.com/read/29670678/the-underestimated-significance-of-conditioning-in-placebo-hypoalgesia-and-nocebo-hyperalgesia
#6
REVIEW
Anne-Kathrin Bräscher, Michael Witthöft, Susanne Becker
Placebo and nocebo effects are intriguing phenomena in pain perception with important implications for clinical research and practice because they can alleviate or increase pain. According to current theoretical accounts, these effects can be shaped by verbal suggestions, social observational learning, and classical conditioning and are necessarily mediated by explicit expectation. In this review, we focus on the contribution of conditioning in the induction of placebo hypoalgesia and nocebo hyperalgesia and present accumulating evidence that conditioning independent from explicit expectation can cause these effects...
2018: Pain Research & Management: the Journal of the Canadian Pain Society
https://www.readbyqxmd.com/read/29670503/mobile-phone-chips-reduce-increases-in-eeg-brain-activity-induced-by-mobile-phone-emitted-electromagnetic-fields
#7
Diana Henz, Wolfgang I Schöllhorn, Burkhard Poeggeler
Recent neurophysiological studies indicate that exposure to electromagnetic fields (EMFs) generated by mobile phone radiation can exert effects on brain activity. One technical solution to reduce effects of EMFs in mobile phone use is provided in mobile phone chips that are applied to mobile phones or attached to their surfaces. To date, there are no systematical studies on the effects of mobile phone chip application on brain activity and the underlying neural mechanisms. The present study investigated whether mobile phone chips that are applied to mobile phones reduce effects of EMFs emitted by mobile phone radiation on electroencephalographic (EEG) brain activity in a laboratory study...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29669938/canagliflozin-triggers-the-fgf23-1-25-dihydroxyvitamin-d-pth-axis-in-healthy-volunteers-in-a-randomized-crossover-study
#8
Jenny E Blau, Viviana Bauman, Ellen M Conway, Paolo Piaggi, Mary F Walter, Elizabeth C Wright, Shanna Bernstein, Amber B Courville, Michael T Collins, Kristina I Rother, Simeon I Taylor
BACKGROUND: Sodium glucose cotransporter-2 (SGLT2) inhibitors are the most recently approved class of drugs for type 2 diabetes and provide both glycemic efficacy and cardiovascular risk reduction. A number of safety issues have been identified, including treatment-emergent bone fractures. To understand the overall clinical profile, these safety issues must be balanced against an attractive efficacy profile. Our study was designed to investigate pathophysiological mechanisms mediating treatment-emergent adverse effects on bone health...
April 19, 2018: JCI Insight
https://www.readbyqxmd.com/read/29668990/vitamin-d-receptor-activation-raises-soluble-thrombomodulin-levels-in-chronic-kidney-disease-patients-a-double-blind-randomized-trial
#9
Graziella D'arrigo, Patrizia Pizzini, Sebastiano Cutrupi, Rocco Tripepi, Giovanni Tripepi, Francesca Mallamaci, Carmine Zoccali
Background: Thrombomodulin (TM) is a proteoglycan highly represented in the endothelial glycocalix that regulates the haemostasis and the endothelial response to inflammation. High soluble TM levels underlie a lower risk for coronary heart disease in population studies. Activation of vitamin D receptor (VDR) upregulates TM, but the effect of this intervention on soluble TM has never been tested in chronic kidney disease (CKD) patients. Methods: We performed a post hoc analysis of a 12 weeks double blind, randomized, placebo-controlled trial testing the effect of VDR activation by paricalcitol (PCT) on endothelium-dependent flow-mediated vasodilatation (FMD) in the forearm (ClinicalTrials...
April 13, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29668918/glutamatergic-signaling-drives-ketamine-mediated-response-in-depression-evidence-from-dynamic-causal-modeling
#10
Jessica R Gilbert, Julia S Yarrington, Kathleen E Wills, Allison C Nugent, Carlos A Zarate
Background: The glutamatergic modulator ketamine has rapid antidepressant effects in individuals with major depressive disorder (MDD) and bipolar depression. Thus, modulating glutamatergic transmission may be critical to effectively treating depression, though the mechanisms by which this occurs are not fully understood. Methods: This double-blind, crossover, placebo-controlled study analyzed data from 18 drug-free MDD subjects and 18 heathy controls who received a single intravenous infusion of ketamine hydrochloride (0...
April 13, 2018: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29668720/do-we-treat-our-patients-or-rather-periodontal-microbes-with-adjunctive-antibiotics-in-periodontal-therapy-a-16s-rdna-microbial-community-analysis
#11
Daniel Hagenfeld, Raphael Koch, Sebastian Jünemann, Karola Prior, Inga Harks, Peter Eickholz, Thomas Hoffmann, Ti-Sun Kim, Thomas Kocher, Jörg Meyle, Doğan Kaner, Ulrich Schlagenhauf, Benjamin Ehmke, Dag Harmsen
Empiric antibiotics are often used in combination with mechanical debridement to treat patients suffering from periodontitis and to eliminate disease-associated pathogens. Until now, only a few next generation sequencing 16S rDNA amplicon based publications with rather small sample sizes studied the effect of those interventions on the subgingival microbiome. Therefore, we studied subgingival samples of 89 patients with chronic periodontitis (solely non-smokers) before and two months after therapy. Forty-seven patients received mechanical periodontal therapy only, whereas 42 patients additionally received oral administered amoxicillin plus metronidazole (500 and 400 mg, respectively; 3x/day for 7 days)...
2018: PloS One
https://www.readbyqxmd.com/read/29663628/exenatide-effects-on-gastric-emptying-and-oral-glucose-appearance-in-plasma-a-quantitative-assessment-using-an-integrative-systems-pharmacology-model
#12
Veronika Voronova, Kirill Zhudenkov, Robert C Penland, David W Boulton, Gabriel Helmlinger, Kirill Peskov
Glucagon-like peptide (GLP)-1 and synthetic GLP-1 receptor agonists (GLP-1RA) slow gastric emptying rate (GER), thereby decreasing the Glucose Rate of Appearance (GluRA) in plasma, which may contribute to postprandial plasma glucose (PPG) stabilization under GLP-1RA treatment. A quantitative systems pharmacology (QSP) approach was used to evaluate the effect of exenatide immediate release (IR), a short-acting GLP-1RA, on GER and GluRA. The proposed model is based on the data from multiple published sources including: (1) GLP-1 and exenatide plasma concentration-time profiles; (2) GER estimates under placebo, GLP-1 or exenatide IR dosing; (3) GluRA measurements upon food intake...
April 16, 2018: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29661838/chronic-supplementation-with-a-mitochondrial-antioxidant-mitoq-improves-vascular-function-in-healthy-older-adults
#13
Matthew J Rossman, Jessica R Santos-Parker, Chelsea A C Steward, Nina Z Bispham, Lauren M Cuevas, Hannah L Rosenberg, Kayla A Woodward, Michel Chonchol, Rachel A Gioscia-Ryan, Michael P Murphy, Douglas R Seals
Excess reactive oxygen species production by mitochondria is a key mechanism of age-related vascular dysfunction. Our laboratory has shown that supplementation with the mitochondrial-targeted antioxidant MitoQ improves vascular endothelial function by reducing mitochondrial reactive oxygen species and ameliorates arterial stiffening in old mice, but the effects in humans are unknown. Here, we sought to translate our preclinical findings to humans and determine the safety and efficacy of MitoQ. Twenty healthy older adults (60-79 years) with impaired endothelial function (brachial artery flow-mediated dilation <6%) underwent 6 weeks of oral supplementation with MitoQ (20 mg/d) or placebo in a randomized, placebo-controlled, double-blind, crossover design study...
April 16, 2018: Hypertension
https://www.readbyqxmd.com/read/29661516/lisdexamfetamine-targets-amygdala-mechanisms-that-bias-cognitive-control-in-attention-deficit-hyperactivity-disorder
#14
Kurt P Schulz, Beth Krone, Lenard A Adler, Anne-Claude V Bédard, Stephanie Duhoux, Juan Pedraza, Sanweda Mahagabin, Jeffrey H Newcorn
BACKGROUND: Prefrontal-limbic circuits that form the neural architecture for emotion to influence behavior have been implicated in the pathophysiology of attention-deficit/hyperactivity disorder (ADHD) and represent a potentially important target of medication treatment that has not been substantively evaluated. This study tested the effect of the psychostimulant prodrug lisdexamfetamine dimesylate on amygdala activation and connectivity during the emotional bias of response execution and inhibition...
March 19, 2018: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/29661378/differential-role-of-nitric-oxide-in-the-psychedelic-symptoms-induced-by-racemic-ketamine-and-esketamine-in-human-volunteers
#15
K Jonkman, R van der Schrier, M van Velzen, L Aarts, E Olofsen, E Sarton, M Niesters, A Dahan
BACKGROUND: Animal studies suggest that N-methyl-d-aspartate receptor (NMDAR) hypofunction and subsequent decline in intracellular nitric oxide (NO) are responsible for development of ketamine-induced psychedelic symptoms. To examine this mechanism in humans, we administered the NO donor sodium nitroprusside during infusion of racemic ketamine (RS-ketamine), containing equal amounts of S(+)- and R(-)-ketamine isomers, or esketamine, containing just the S(+)-isomer. METHODS: In this randomised, double blind, placebo-controlled crossover study, healthy volunteers were treated with sodium nitroprusside 0...
May 2018: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29655877/endocrine-and-haemodynamic-changes-in-resistant-hypertension-and-blood-pressure-responses-to-spironolactone-or-amiloride-the-pathway-2-mechanisms-substudies
#16
Bryan Williams, Thomas M MacDonald, Steve V Morant, David J Webb, Peter Sever, Gordon T McInnes, Ian Ford, J Kennedy Cruickshank, Mark J Caulfield, Sandosh Padmanabhan, Isla S Mackenzie, Jackie Salsbury, Morris J Brown
BACKGROUND: In the PATHWAY-2 study of resistant hypertension, spironolactone reduced blood pressure substantially more than conventional antihypertensive drugs. We did three substudies to assess the mechanisms underlying this superiority and the pathogenesis of resistant hypertension. METHODS: PATHWAY-2 was a randomised, double-blind crossover trial done at 14 UK primary and secondary care sites in 314 patients with resistant hypertension. Patients were given 12 weeks of once daily treatment with each of placebo, spironolactone 25-50 mg, bisoprolol 5-10 mg, and doxazosin 4-8 mg and the change in home systolic blood pressure was assessed as the primary outcome...
April 11, 2018: Lancet Diabetes & Endocrinology
https://www.readbyqxmd.com/read/29648878/protective-effect-of-lactobacillus-reuteri-dsm-17938-against-experimental-necrotizing-enterocolitis-is-mediated-by-toll-like-receptor-2
#17
Thomas K Hoang, Baokun He, Ting Wang, Dat Q Tran, Jon Marc Rhoads, Yuying Liu
Lactobacillus reuteri DSM 17938 (LR 17938) has been shown to reduce the incidence and severity of necrotizing enterocolitis (NEC). It is unclear if preventing NEC by LR 17938 is mediated by toll-like receptor 2 (TLR2), which is known to mediate pro-inflammatory responses to bacterial cell wall components. NEC was induced in newborn TLR2-/- or WT mice by the combination of gavage-feeding cow milk-based formula and exposure to hypoxia and cold stress. Treatment groups were administered formula supplemented with LR 17938 or placebo (MRS media)...
April 12, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29645071/daclizumab-in-multiple-sclerosis
#18
REVIEW
F C Perez-Miralles
INTRODUCTION: Daclizumab is a monoclonal antibody directed against the CD25 subunit of the interleukin-2 receptor, investigated as a disease-modifying therapy in relapsing-remitting multiple sclerosis. The present review addresses how the drug was developed, the known mechanism of action of the drug and the up-to-date data of efficacy and safety. DEVELOPMENT: Daclizumab has shown superiority in prevention of relapses against placebo and low-dose interferon beta-1a at a level that puts it on par with the rest of current first-line drugs...
April 16, 2018: Revista de Neurologia
https://www.readbyqxmd.com/read/29628465/-pharmacological-characteristics-and-clinical-study-results-of-the-oral-proteasome-inhibitor-ixazomib-ninlaro-%C3%A2-capsules-2-3-mg-3-mg-and-4-mg
#19
Michiko Machida, Shinichi Fukunaga, Takahito Hara
Ixazomib (Ninlaro® capsule) is an oral small molecule 20S proteasome inhibitor created by Millennium Pharmaceuticals, Inc (Takeda Oncology Company). Ubiquitin proteasome system is a major regulatory system for maintaining protein homeostasis, and an important mechanism for degrading proteins, such as those involved in proliferation regulation, cell cycle regulation and apoptosis, in cells. Ixazomib selectively and reversibly binds to the β5 subunit of the 20S proteasome, inhibits its chymotrypsin-like activity, and thereby accumulates ubiquitinated proteins...
2018: Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
https://www.readbyqxmd.com/read/29627898/cross-sectional-networks-of-depressive-symptoms-before-and-after-antidepressant-medication-treatment
#20
Fionneke M Bos, Eiko I Fried, Steven D Hollon, Laura F Bringmann, Sona Dimidjian, Robert J DeRubeis, Claudi L H Bockting
PURPOSE: Recent reviews have questioned the efficacy of selective serotonin reuptake inhibitors (SSRIs) above placebo response, and their working mechanisms remain unclear. New approaches to understanding the effects of SSRIs are necessary to enhance their efficacy. The aim of this study was to explore the possibilities of using cross-sectional network analysis to increase our understanding of symptom connectivity before and after SSRI treatment. METHODS: In two randomized controlled trials (total N = 178), we estimated Gaussian graphical models among 20 symptoms of the Beck Depression Inventory-II before and after 8 weeks of treatment with the SSRI paroxetine...
April 7, 2018: Social Psychiatry and Psychiatric Epidemiology
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