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https://www.readbyqxmd.com/read/28636217/research-on-potential-biomarker-correlates-for-suicidal-behavior-a-review
#1
REVIEW
Sangha Kim, Kyoung-Uk Lee
Suicide is a world health priority. Studies over the last few decades have revealed the complexity underlying the neurobiological mechanisms of suicide. Researchers have found dysregulations in the serotonergic system, the stress system, neural plasticity, lipid metabolism, and cell signaling pathways in relation to suicidal behaviors. These findings have provided more insight into the final path leading to suicide, at which medical intervention should be applied to prevent the action. However, because these molecular mechanisms have been implicated in both depression and suicide, the specificity of the mechanisms has been obscured...
June 21, 2017: Asia-Pacific Psychiatry: Official Journal of the Pacific Rim College of Psychiatrists
https://www.readbyqxmd.com/read/28633953/reversal-learning-and-resurgence-of-operant-behavior-in-zebrafish-danio-rerio
#2
Toshikazu Kuroda, Yuto Mizutani, Carlos R X Cançado, Christopher A Podlesnik
Zebrafish are used extensively as vertebrate animal models in biomedical research for having such features as a fully sequenced genome and transparent embryo. Yet, operant-conditioning studies with this species are scarce. The present study investigated reversal learning and resurgence of operant behavior in zebrafish. A target response (approaching a sensor) was reinforced in Phase 1. In Phase 2, the target response was extinguished while reinforcing an alternative response (approaching a different sensor)...
June 17, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28633899/discovery-of-bms-961955-an-allosteric-inhibitor-of-the-hepatitis-c-virus-ns5b-polymerase
#3
Barbara Zhizhen Zheng, Stanley V D'Andrea, Umesh Hanumegowda, Jay O Knipe, Kathy Mosure, Xiaoliang Zhuo, Julie A Lemm, Mengping Liu, Karen L Rigat, Ying-Kai Wang, Hua Fang, Chris Poronsky, Jingfang Cutrone, Dauh-Rurng Wu, Pirama Nayagam Arunachalam, T J Balapragalathan, Arunachalam Arumugam, Arvind Mathur, Nicholas A Meanwell, Min Gao, Susan B Roberts, John F Kadow
The synthesis, structure-activity relationship (SAR) data, and further optimization of the metabolic stability and pharmacokinetic (PK) properties for a previously disclosed class of cyclopropyl-fused indolobenzazepine HCV NS5B polymerase inhibitors are described. These efforts led to the discovery of BMS-961955 as a viable contingency backup to beclabuvir which was recently approved in Japan for the treatment of HCV as part of a three drug, single pill combination marketed as Ximency(TM).
June 11, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28633606/exact-bayesian-p-values-for-a-test-of-independence-in-a-2%C3%A2-%C3%A3-%C3%A2-2-contingency-table-with-missing-data
#4
Yan Lin, Stuart R Lipsitz, Debajyoti Sinha, Garrett Fitzmaurice, Steven Lipshultz
Altham (Altham PME. Exact Bayesian analysis of a 2 × 2 contingency table, and Fisher's "exact" significance test. J R Stat Soc B 1969; 31: 261-269) showed that a one-sided p-value from Fisher's exact test of independence in a 2 × 2 contingency table is equal to the posterior probability of negative association in the 2 × 2 contingency table under a Bayesian analysis using an improper prior. We derive an extension of Fisher's exact test p-value in the presence of missing data, assuming the missing data mechanism is ignorable (i...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/28632015/the-associations-between-clerkship-objective-structured-clinical-examination-osce-grades-and-subsequent-performance
#5
Ting Dong, Christopher Zahn, Aaron Saguil, Kimberly A Swygert, Michelle Yoon, Jessica Servey, Steven Durning
Construct: We investigated the extent of the associations between medical students' clinical competency measured by performance in Objective Structured Clinical Examinations (OSCE) during Obstetrics/Gynecology and Family Medicine clerkships and later performance in both undergraduate and graduate medical education. BACKGROUND: There is a relative dearth of studies on the correlations between undergraduate OSCE scores and future exam performance within either undergraduate or graduate medical education and almost none on linking these simulated encounters to eventual patient care...
March 2, 2017: Teaching and Learning in Medicine
https://www.readbyqxmd.com/read/28630826/predicting-the-effects-of-interventions-a-tutorial-on-the-disequilibrium-model
#6
Kenneth W Jacobs, Zachary H Morford, James E King, Linda J Hayes
The disequilibrium approach to reinforcement and punishment, derived from the probability-differential hypothesis and response deprivation hypothesis, provides a number of potentially useful mathematical models for practitioners. The disequilibrium approach and its accompanying models have proven effective in the prediction and control of behavior, yet they have not been fully espoused and integrated into clinical practice. The purpose of this tutorial is to detail the disequilibrium approach and adapt its mathematical models for use as a tool in applied settings...
June 2017: Behavior Analysis in Practice
https://www.readbyqxmd.com/read/28630257/contrasting-effects-of-medial-and-lateral-orbitofrontal-cortex-lesions-on-credit-assignment-and-decision-making-in-humans
#7
MaryAnn P Noonan, Bolton Chau, Matthew Fs Rushworth, Lesley K Fellows
The orbitofrontal cortex is critical for goal-directed behavior. Recent work in macaques has suggested the lateral orbitofrontal cortex (lOFC) is relatively more concerned with assignment of credit for rewards to particular choices during value-guided learning, while the medial orbitofrontal cortex (often referred to as ventromedial prefrontal cortex in humans; vmPFC/mOFC) is involved in constraining the decision to the relevant options. We examined whether people with damage restricted to sub-regions of prefrontal cortex showed the patterns of impairment observed in prior investigations of the effects of lesions to homologous regions in macaques...
June 19, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28629375/diagnostic-performance-of-multi-organ-ultrasound-with-pocket-sized-device-in-the-management-of-acute-dyspnea
#8
Alfonso Sforza, Costantino Mancusi, Maria Viviana Carlino, Agostino Buonauro, Marco Barozzi, Giuseppe Romano, Sossio Serra, Giovanni de Simone
BACKGROUND: The availability of ultra-miniaturized pocket ultrasound devices (PUD) adds diagnostic power to the clinical examination. Information on accuracy of ultrasound with handheld units in immediate differential diagnosis in emergency department (ED) is poor. The aim of this study is to test the usefulness and accuracy of lung ultrasound (LUS) alone or combined with ultrasound of the heart and inferior vena cava (IVC) using a PUD for the differential diagnosis of acute dyspnea (AD)...
June 19, 2017: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28627778/engineering-cho-cells-with-an-oncogenic-kit-improves-cells-growth-resilience-to-stress-and-productivity
#9
Mohamed Mahameed, Boaz Tirosh
An optimized biomanufacturing process in mammalian cells is contingent on the ability of the producing cells to reach high viable cell densities. In addition, at the peak of growth, cells need to continue producing the biological entity at a consistent quality. Thus, engineering cells with robust growth performance and resilience to variable stress conditions is highly desirable. The tyrosine kinase receptor, KIT, plays a key role in cell differentiation and the survival of several immune cell types. Its oncogenic mutant, D816V, endows cells with high proliferation capacity and resistance to kinase inhibitors...
June 19, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28627737/caries-treatment-decisions-among-undergraduate-and-postgraduate-students-supported-by-visual-detection-systems
#10
Vinícius Krieger Costa Nogueira, Diego Girotto Bussaneli, Manuel Restrepo Restrepo, Rubens Spin-Neto, Lourdes Aparecida Martins Dos Santos-Pinto, Thalita Boldieri, Rita de Cássia Loiola Cordeiro
BACKGROUND: The difficulties of caries diagnosis and the level of examiner's experience may influence the treatment decision, resulting excessive and inefficient intervention. AIM: This randomized experimental study evaluated caries treatment decisions made by undergraduate (UG) and postgraduate (PG) students when examination was performed through conventional visual clinical examination (CVCE) and when supported by ICDAS (IC) or Nyvad's (NY) criteria. DESIGN: Four UG and four PG initially analyzed, by CVCE, 300 primary incisors and molars surfaces of 25 children aged 5-12 years, and choose between no treatment, non-operative, and operative treatment...
June 19, 2017: International Journal of Paediatric Dentistry
https://www.readbyqxmd.com/read/28627420/distinct-neural-processes-supports-post-success-and-post-error-slowing-in-the-stop-signal-task
#11
Yihe Zhang, Jaime S Ide, Sheng Zhang, Sien Hu, Nikola S Valchev, Xiaoying Tang, Chiang-Shan R Li
Executive control requires behavioral adaptation to environmental contingencies. In the stop signal task (SST), participants exhibit slower go trial reaction time (RT) following a stop trial, whether or not they successfully interrupt the motor response. In previous fMRI studies, we demonstrated activation of the right-hemispheric ventrolateral prefrontal cortex, in the area of inferior frontal gyrus, pars opercularis (IFGpo) and anterior insula (AI), during post-error slowing (PES). However, in similar analyses we were not able to identify regional activities during post-success slowing (PSS)...
June 13, 2017: Neuroscience
https://www.readbyqxmd.com/read/28626437/counter-stereotypes-and-feminism-promote-leadership-aspirations-in-highly-identified-women
#12
Carola Leicht, Małgorzata A Gocłowska, Jolien A Van Breen, Soledad de Lemus, Georgina Randsley de Moura
Although women who highly identify with other women are more susceptible to stereotype threat effects, women's identification might associate with greater leadership aspirations contingent on (1) counter-stereotype salience and (2) feminist identification. When gender counter-stereotypes are salient, women's identification should associate with greater leadership aspiration regardless of feminism, while when gender stereotypes are salient, women's identification would predict greater leadership aspirations contingent on a high level of feminist identification...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28625550/maternal-exposure-to-western-diet-affects-adult-body-composition-and-voluntary-wheel-running-in-a-genotype-specific-manner-in-mice
#13
Layla Hiramatsu, Jarren Kay, Zoe Thompson, Jennifer Singleton, Gerald Claghorn, Ralph Lacerda de Albuquerque, Brittany Ho, Brett Ho, Gabriela Sanchez, Theodore Garland
Some human diseases, including obesity, Type II diabetes, and numerous cancers, are thought to be influenced by environments experienced in early life, including in utero. Maternal diet during the perinatal period may be especially important for adult offspring energy balance, potentially affecting both body composition and physical activity. This effect may be mediated by the genetic background of individuals, including, for example, potential "protective" mechanisms for individuals with inherently high levels of physical activity or high basal metabolic rates...
June 15, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28624970/cardiovascular-implantable-electronic-devices-a-review-of-the-dangers-and-difficulties-in-mr-scanning-and-attempts-to-improve-safety
#14
REVIEW
Pei Ghim Poh, Charlene Liew, Colin Yeo, Le Roy Chong, Andrew Tan, Angeline Poh
An increasing number of patients are being treated with cardiovascular implantable electronic devices (CIEDs), many of which are MR conditional. There is a lack of literature on the safe scanning of MR conditional CIEDs. This review article discusses MR imaging safety in patients with implanted CIEDs. Guidelines on safe use and indications of imaging patients with MR conditional CIEDs are described, followed by a pictorial essay of the radiographic features of these devices. We also discuss the challenges of monitoring the patient in the MR environment, advances in MRI conditional imaging of devices, availability, limitations and workflow including vendor-specific and other collaborative efforts to simplify the scanning process...
June 17, 2017: Insights Into Imaging
https://www.readbyqxmd.com/read/28624447/enhanced-first-trimester-screening-for-trisomy-21-with-contingent-cell-free-fetal-dna-a-comparative-performance-and-cost-analysis
#15
Tianhua Huang, Wendy S Meschino, Mari Teitelbaum, Shelley Dougan, Nan Okun
OBJECTIVE: Prenatal screening for trisomy 21 is a standard of care. Emerging cell-free fetal DNA (cffDNA) technologies can improve screening performance, but they are expensive. This study was conducted to propose a contingent screening model that would incorporate cffDNA technology, would remain affordable, and could be applied equitably in a publically funded system. METHODS: Using performance and cost parameters from published literature, four prenatal screening strategies were compared...
June 14, 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/28623823/a-randomized-placebo-controlled-trial-of-n-acetylcysteine-for-cannabis-use-disorder-in-adults
#16
Kevin M Gray, Susan C Sonne, Erin A McClure, Udi E Ghitza, Abigail G Matthews, Aimee L McRae-Clark, Kathleen M Carroll, Jennifer S Potter, Katharina Wiest, Larissa J Mooney, Albert Hasson, Sharon L Walsh, Michelle R Lofwall, Shanna Babalonis, Robert W Lindblad, Steven Sparenborg, Aimee Wahle, Jacqueline S King, Nathaniel L Baker, Rachel L Tomko, Louise F Haynes, Ryan G Vandrey, Frances R Levin
BACKGROUND: Cannabis use disorder (CUD) is a prevalent and impairing condition, and established psychosocial treatments convey limited efficacy. In light of recent findings supporting the efficacy of N-acetylcysteine (NAC) for CUD in adolescents, the objective of this trial was to evaluate its efficacy in adults. METHODS: In a 12-week double-blind randomized placebo-controlled trial, treatment-seeking adults ages 18-50 with CUD (N=302), enrolled across six National Drug Abuse Treatment Clinical Trials Network-affiliated clinical sites, were randomized in a 1:1 ratio to a 12-week course of NAC 1200mg (n=153) or placebo (n=149) twice daily...
June 10, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28623404/action-effects-enhance-explicit-sequential-learning
#17
Sarah Esser, Hilde Haider
Different studies have shown that action-effect associations seem to enhance implicit learning of motor sequences. In a recent study (Haider et al., Conscious Cognit 26:145-161, 2014), we found indications that action-effect learning might play a special role in acquiring explicit knowledge within an implicit learning situation. The current study aims at directly manipulating the action-effect contingencies in a Serial Reaction Time Task and examining its impact on explicit sequence knowledge. For this purpose, we created a situation in which the participants' responses led to a melodic tone sequence...
June 16, 2017: Psychological Research
https://www.readbyqxmd.com/read/28622030/age-of-initiation-and-internet-gaming-disorder-the-role-of-self-esteem
#18
Charlotte L Beard, Amie L Haas, Robert E Wickham, Vasileios Stavropoulos
The link between early initiation and problematic use has been observed for substance use disorders; however, this link has not been as clearly established for Internet gaming disorder (IGD). Available studies indicate that individuals who initiate Internet use at younger ages exhibit an increased risk for general Internet addiction. Prior research also suggests unique cognitive processes in online gaming, such that an individual's overall sense of self-worth can become contingent upon self-esteem derived from the gaming environment...
June 2017: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/28620934/fairness-in-cost-benefit-analysis-a-methodology-for-health-technology-assessment
#19
Anne-Laure Samson, Erik Schokkaert, Clémence Thébaut, Brigitte Dormont, Marc Fleurbaey, Stéphane Luchini, Carine Van de Voorde
We evaluate the introduction of various forms of antihypertensive treatments in France with a distribution-sensitive cost-benefit analysis. Compared to traditional cost-benefit analysis, we implement distributional weighting based on equivalent incomes, a new concept of individual well-being that does respect individual preferences but is not subjectively welfarist. Individual preferences are estimated on the basis of a contingent valuation question, introduced into a representative survey of the French population...
June 16, 2017: Health Economics
https://www.readbyqxmd.com/read/28616656/accuracy-of-neutrophil-gelatinase-associated-lipocalin-for-acute-kidney-injury-diagnosis-in-children-systematic-review-and-meta-analysis
#20
REVIEW
Luís Taddeo Filho, Antonio Jose Grande, Tamy Colonetti, Éverton Simon Possamai Della, Maria Inês da Rosa
OBJECTIVE: To estimate the accuracy of Neutrophil Gelatinase-Associated Lipocalin (NGAL) as a biomarker for acute kidney injury (AKI) in children. METHODS: A systematic review of the literature was performed. The review protocol was registered at PROSPERO (CRD 42015024153). We conducted searches in the following databases: Medline (PubMed), LILACS (BVS), SCOPUS (Elsevier), Embase (OVID), Cochrane Central Register of Controlled Trials (CENTRAL), Biomed Central, and ISI Web of Science, from January 1990 to October 2016...
June 14, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
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