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Mechanism placebo effect

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https://www.readbyqxmd.com/read/28210930/emotion-specific-nocebo-effects-an-fmri-study
#1
Anne Schienle, Carina Höfler, Sonja Übel, Albert Wabnegger
The neurobiological mechanisms of nocebos are still poorly understood. Thirty-eight women participated in a 'smell study' using functional magnetic resonance imaging. They were presented with an odorless stimulus (distilled water) together with the verbal suggestion that this fluid has an aversive odor which enhances disgust feelings. The nocebo was presented while the participants viewed disgusting, fear-inducing, and neutral images. Participants' affective and neuronal responses during nocebo administration were compared with those in a control condition without nocebo...
February 16, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28207796/post-extubation-stridor-in-respiratory-syncytial-virus-bronchiolitis-is-there-a-role-for-prophylactic-dexamethasone
#2
Esther S Veldhoen, Charlotte A Smulders, Teus H Kappen, Job C Calis, Job van Woensel, Paulien A M Raymakers-Janssen, Louis J Bont, Marije P Hennus
AIM: The purpose of this study was to determine the incidence of reintubation due to upper airway obstruction in a homogeneous group of ventilated infants with Respiratory Syncytial Virus bronchiolitis. Our secondary objective was to determine whether prophylactic administration of dexamethasone prior to extubation was associated with decreased risk of reintubation. METHODS: This retrospective observational study in two Pediatric Intensive Care Units in 2 university hospitals in The Netherlands included two hundred patients younger than 13 months admitted with respiratory insufficiency caused by Respiratory Syncytial Virus bronchiolitis, requiring invasive mechanical ventilation...
2017: PloS One
https://www.readbyqxmd.com/read/28203105/association-of-fatigue-and-depression-with-circulating-levels-of-proinflammatory-cytokines-and-epidermal-growth-factor-receptor-ligands-a-correlative-study-of-a-placebo-controlled-fatigue-trial
#3
Tyvin Rich, Fengmin Zhao, Ricardo A Cruciani, David Cella, Judith Manola, Michael J Fisch
CONTEXT: The biology of fatigue and depression in cancer patients is poorly understood. Hypotheses regarding cytokines and growth factors related to sickness behavior and disruption of circadian signaling have been proposed. OBJECTIVES: We prospectively examined proinflammatory cytokines (e.g., sickness behavior model) and epidermal growth factor receptor (EGFR) ligands (e.g., circadian disruption model) in the serum of cancer patients enrolled in a clinical trial testing levocarnitine for fatigue...
2017: Cancer Management and Research
https://www.readbyqxmd.com/read/28196966/effect-of-selective-5-ht6r-agonist-on-expression-of-5-ht-receptor-and-neurotransmitter-in-vascular-dementia-rats
#4
Haining Yu, Tao Chen, Li Zhou, Jiyou Tang
BACKGROUND 5-HT6 receptor (5-HT6R) has pluripotent roles regulating secretion of neurotransmitters. However, whether 5-HT6R is involved in the development of vascular dementia (VD) remains unclear. To evaluate the role and mechanism of 5-HT6R in VD, this study established a rat VD model to evaluate the effect of selective 5-HT6R agonist on the expression of 5-HT6R mRNA and neurotransmitter. MATERIAL AND METHODS Eighty healthy male SD rats (7 weeks old) were randomly assigned to sham, model, 5-HT6R agonist, and placebo groups (N=20 each)...
February 15, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28194192/the-effect-of-acupressure-on-muscle-cramps-in-patients-undergoing-hemodialysis
#5
Kolsoom Mohmadi, Nahid Shahgholian, Mahboubeh Valiani, Hossein Mardanparvar
BACKGROUND: Pain resulting from muscle cramps is one of the most common outcomes of hemodialysis. One of the mechanisms associated with muscle cramps is unnatural muscle metabolism. Because acupressure improves muscle metabolism through the releasing of energy, this study was performed with the purpose of determining the impact of acupressure on muscle cramps. MATERIALS AND METHODS: This study was a single-blind clinical trial. Accordingly, 64 patients were selected and intensity and frequency of muscle cramps were determined by randomly categorizing them into two groups...
November 2016: Iranian Journal of Nursing and Midwifery Research
https://www.readbyqxmd.com/read/28187400/can-c-reactive-protein-inform-antidepressant-medication-selection-in-depressed-outpatients-findings-from-the-co-med-trial
#6
Manish K Jha, Abu Minhajuddin, Bharathi S Gadad, Tracy Greer, Bruce Grannemann, Abigail Soyombo, Taryn L Mayes, A John Rush, Madhukar H Trivedi
OBJECTIVE: Currently, no valid measures inform treatment selection for depressed patients. Whether C-reactive protein (CRP) in particular and two other acute phase reactants (inflammatory markers) could differentiate between patients responding to either of two treatments with different mechanisms of action was assessed. METHOD: Subjects included Combining Medications to Enhance Depression Outcomes (CO-MED) trial participants randomly assigned to either escitalopram plus placebo (SSRI monotherapy, n=51) or bupropion plus escitalopram combination (bupropion-SSRI combination, n=55) with baseline plasma samples...
January 24, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28185274/clarithromycin-trimethoprim-and-penicillin-and-oxidative-nucleic-acid-modifications-in-humans-randomised-controlled-trials
#7
Emil List Larsen, Vanja Cejvanovic, Laura Kofoed Kjaer, Morten Thorup Pedersen, Sara Daugaard Popik, Lina Kallehave Hansen, Jon Traerup Andersen, Espen Jimenez-Solem, Kasper Broedbaek, Morten Petersen, Allan Weimann, Trine Henriksen, Jens Lykkesfeldt, Christian Torp-Pedersen, Henrik Enghusen Poulsen
AIMS: In vitro studies have demonstrated that formation of reactive oxygen species (ROS) contributes to the effect of bactericidal antibiotics. The formation of ROS is not restricted to bacteria, but also occurs in mammalian cells. Oxidative stress is linked to several diseases. This study investigates whether antibiotic drugs induce oxidative stress in healthy humans as a possible mechanism for adverse reactions to the antibiotic drugs. METHODS: This study contains information from two randomised, controlled trials...
February 10, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28183564/the-effect-of-tramadol-plus-paracetamol-on-consumption-of-morphine-after-coronary-artery-bypass-grafting
#8
Dilek Altun, Özlem Çınar, Emre Özker, Ayda Türköz
STUDY OF OBJECTIVE: To compare the effects of oral tramadol+paracetamol combination on morphine consumption following coronary artery bypass grafting (CABG) in the patient-controlled analgesia (PCA) protocol. DESIGN: A prospective, double-blind, randomized, clinical study. SETTING: Single-institution, tertiary hospital. PATIENTS: Fifty cardiac surgical patients undergoing primary CABG surgery. INTERVENTIONS: After surgery, the patients were allocated to 1 of 2 groups...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28183030/estradiol-and-raloxifene-modulate-hippocampal-gamma-oscillations-during-a-spatial-memory-task
#9
Anna Schroeder, Matthew Hudson, Xin Du, Yee Wen Candace Wu, Jay Nakamura, Maarten van den Buuse, Nigel C Jones, Rachel A Hill
Previous work suggests that estradiol regulates the expression of hippocampal parvalbumin as well as hippocampus-dependent spatial memory in mice. Parvalbumin interneurons generate neuronal oscillatory activity in the gamma frequency range (30-80Hz) and gamma oscillations are closely linked with higher cognitive functions. Raloxifene, a selective estrogen receptor modulator, shows beneficial effects on human cognitive performance, and has few peripheral side effects unlike estradiol, but the biological mechanisms which underpin these benefits are not clear...
January 23, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28174292/hypothalamic-and-striatal-insulin-action-suppresses-endogenous-glucose-production-and-may-stimulate-glucose-uptake-during-hyperinsulinemia-in-lean-but-not-in-overweight-men
#10
Martin Heni, Robert Wagner, Stephanie Kullmann, Sofiya Gancheva, Michael Roden, Andreas Peter, Norbert Stefan, Hubert Preissl, Hans Ulrich Häring, Andreas Fritsche
Intranasal spray application facilitates insulin delivery to the human brain. Although brain insulin modulates peripheral metabolism, the mechanisms involved remain elusive.Twenty-one men underwent two hyperinsulinemic-euglycemic clamps with D-[6,6-(2)H2]-glucose infusion to measure endogenous glucose production and glucose disappearance. On two days, participants received intranasal insulin or placebo. Insulin spillover into circulation after intranasal insulin application was mimicked by an iv insulin bolus on placebo day...
February 7, 2017: Diabetes
https://www.readbyqxmd.com/read/28169487/endogenous-analgesic-effect-of-pregabalin-a-double-blind-and-randomized-controlled-trial
#11
S Sugimine, S Saito, T Araki, K Yamamoto, H Obata
BACKGROUND: Conditioned pain modulation (CPM) is widely used to measure endogenous analgesia, and a recent study indicated that drugs that act on endogenous analgesia are more effective in individuals with lower CPM. Recent animal studies have indicated that pregabalin activates endogenous analgesia by stimulating the descending pain inhibitory system. The present study examined whether the analgesic effect of pregabalin is greater in individuals with lower original endogenous analgesia using CPM...
February 7, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28165442/antimicrobial-efficacy-of-probiotic-containing-toothpastes-an-in-vitro-evaluation
#12
Miro Klarić, Vjekoslav Mandić, Sanjin Lovrić, Martina Krešić Ćorić, Nikolina Zovko
Most people have heard of the placebo effect, while relatively few have heard of nocebo, even within the circles of medical staff. Placebo effect means positive results by treatment via pharmacological inert substances. In contrast to placebo, by nocebo effect, due to negative beliefs and expectations, opposite results are achieved. Said in a more formal manner, what a sick person expects, unfortunately, he/she most often gets. It is a fact that a high number of medical staff is still uninterested in placebo and nocebo effects, although they would benefit from them...
February 1, 2017: Medicinski Glasnik
https://www.readbyqxmd.com/read/28164346/randomised-clinical-trial-the-analgesic-properties-of-dietary-supplementation-with-palmitoylethanolamide-and-polydatin-in-irritable-bowel-syndrome
#13
C Cremon, V Stanghellini, M R Barbaro, R F Cogliandro, L Bellacosa, J Santos, M Vicario, M Pigrau, C Alonso Cotoner, B Lobo, F Azpiroz, S Bruley des Varannes, M Neunlist, D DeFilippis, T Iuvone, S Petrosino, V Di Marzo, G Barbara
BACKGROUND: Intestinal immune activation is involved in irritable bowel syndrome (IBS) pathophysiology. While most dietary approaches in IBS involve food avoidance, there are fewer indications on food supplementation. Palmithoylethanolamide, structurally related to the endocannabinoid anandamide, and polydatin are dietary compounds which act synergistically to reduce mast cell activation. AIM: To assess the effect on mast cell count and the efficacy of palmithoylethanolamide/polydatin in patients with IBS...
February 6, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28162492/-259-placebo-use-among-medical-providers-patient-perceptions-and-the-effects-of-a-mechanism-based-educational-intervention
#14
N Kisaalita, M Robinson
No abstract text is available yet for this article.
April 2016: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28161116/a-review-of-the-theoretical-and-biological-understanding-of-the-nocebo-and-placebo-phenomena
#15
REVIEW
Seetal Dodd, Olivia M Dean, João Vian, Michael Berk
PURPOSE: Placebos are commonly used in experimental and patient populations and are known to influence treatment outcomes. The mechanism of action of placebos has been investigated by several researchers. This review investigates the current knowledge regarding the theoretical and biological underpinning of the nocebo and placebo phenomena. METHOD: Literature was searched using PubMed using the following keywords: nocebo, placebo, μ-opioid, dopamine, conditioning, and expectancy...
February 1, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28160585/an-evaluation-of-the-efficacy-of-a-topical-gel-with-triester-glycerol-oxide-tgo-in-the-treatment-of-minor-recurrent-aphthous-stomatitis-in-a-turkish-cohort-a-randomized-double-blind-placebo-controlled-clinical-trial
#16
D Ofluoglu, S Ergun, S Warnakulasuriya, F Namdar-Pekiner, H Tanyeri
BACKGROUND: Triester glycerol oxide gel (Protefix® Queisser Pharma, Germany) is a new topical agent that has the property of adherence to the oral mucosa by forming a lipid film which protects against mechanical trauma and may help to reduce oral tissue moisture loss and inflammation. The aim of this clinical trial was to determine the efficacy of a topical TGO gel and to also compare it with triamcinolone acetonide pomade in the treatment of minor recurrent aphthous stomatitis. MATERIAL AND METHODS: This study was a randomized, double-blind, placebo-controlled clinical trial and 180 patients with the complaint of minor aphthous ulcers were enrolled in this study...
February 4, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28159015/a-randomized-placebo-controlled-phase-ii-study-of-a-pseudomonas-vaccine-in-ventilated-icu-patients
#17
Jordi Rello, Claus-Georg Krenn, Gottfried Locker, Ernst Pilger, Christian Madl, Laura Balica, Thierry Dugernier, Pierre-Francois Laterre, Herbert Spapen, Pieter Depuydt, Jean-Louis Vincent, Lajos Bogár, Zsuzsanna Szabó, Barbara Völgyes, Rafael Máñez, Nahit Cakar, Atilla Ramazanoglu, Arzu Topeli, Maria A Mastruzzo, Abel Jasovich, Christian G Remolif, Liliana Del Carmen Soria, Max A Andresen Hernandez, Carolina Ruiz Balart, Ildikó Krémer, Zsolt Molnár, Frank von Sonnenburg, Arthur Lyons, Michael Joannidis, Heinz Burgmann, Tobias Welte, Anton Klingler, Romana Hochreiter, Kerstin Westritschnig
BACKGROUND: Currently, no vaccine against Pseudomonas is available. IC43 is a new, recombinant, protein (OprF/I)-based vaccine against the opportunistic pathogen, Pseudomonas aeruginosa, a major cause of serious hospital-acquired infections. IC43 has proven immunogenicity and tolerability in healthy volunteers, patients with burns, and patients with chronic lung diseases. In order to assess the immunogenicity and safety of IC43 in patients who are most at risk of acquiring Pseudomonas infections, it was evaluated in mechanically ventilated ICU patients...
February 4, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28151517/-effects-of-glucagon-like-peptide-1-receptor-agonists-on-cardiovascular-risk-factors-and-the-cardiovascular-system
#18
Teresa Vanessa Fiorentino, Giorgio Sesti
The results of the cardiovascular outcome trials comparing the SGLT2 inhibitor empagliflozin and the glucagon-like peptide-1 receptor agonist liraglutide to placebo have been recently published. Interestingly, empagliflozin and liraglutide treatments significantly reduce cardiovascular events in subjects with type 2 diabetes. The mechanisms underlying the observed cardioprotective effects of empagliflozin and liraglutide are speculative and future studies are needed to better understand these results. However, since reduction in the primary outcome was evident 3 months after starting empagliflozin and 24 months after starting liraglutide, it is tempting to hypothesize that the cardiovascular benefits observed in diabetic patients treated with empagliflozin are due to its hemodynamic effects and to metabolic substrate shift induced by the mild and persistent hyperketonemia, while the positive effects of liraglutide treatment may be attributable to biologic changes of atherosclerotic lesions...
December 2016: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/28150971/effects-of-bupropion-sustained-release-on-task-related-eeg-alpha-activity-in-smokers-individual-differences-in-drug-response
#19
Jian Zhu, Ryan P Coppens, Norka E Rabinovich, David G Gilbert
The mechanisms underlying bupropion's efficacy as an antidepressant and a smoking cessation aid are far from being fully characterized. The present study is the first to examine the effects of bupropion on visuospatial task-related parietal EEG alpha power asymmetry-an asymmetry that has previously been found to be associated with severity of depressive symptoms (i.e., the more depressive symptoms, the greater alpha power in the right vs. left parietal area [Henriques & Davidson, 1997; Rabe, Debener, Brocke, & Beauducel, 2005])...
February 2017: Experimental and Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28145999/short-term-effects-of-methylphenidate-on-math-productivity-in-children-with-attention-deficit-hyperactivity-disorder-are-mediated-by-symptom-improvements-evidence-from-a-placebo-controlled-trial
#20
Anne Fleur Kortekaas-Rijlaarsdam, Marjolein Luman, Edmund Sonuga-Barke, Pierre M Bet, Jaap Oosterlaan
BACKGROUND: Although numerous studies report positive effects of methylphenidate on academic performance, the mechanism behind these improvements remains unclear. This study investigates the effects of methylphenidate on academic performance in children with attention-deficit/hyperactivity disorder (ADHD) and the mediating and moderating influence of ADHD severity, academic performance, and ADHD symptom improvement. METHODS: Sixty-three children with ADHD participated in a double-blind placebo-controlled crossover study comparing the effects of long-acting methylphenidate and placebo...
January 31, 2017: Journal of Clinical Psychopharmacology
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