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https://www.readbyqxmd.com/read/27936499/the-anatomy-of-mammalian-sweet-taste-receptors
#1
Jean-Baptiste Chéron, Jérôme Golebiowski, Serge Antonczak, Sébastien Fiorucci
All sweet-tasting compounds are detected by a single G-protein coupled receptor (GPCR), the heterodimer T1R2-T1R3, for which no experimental structure is available. The sweet taste receptor is a class C GPCR, and the recently published crystallographic structures of metabotropic glutamate receptor (mGluR) 1 and 5 provide a significant step forward for understanding structure-function relationships within this family. In this article, we recapitulate more than six hundred single point site-directed mutations and available structural data to obtain a critical alignment of the sweet taste receptor sequences with respect to other class C GPCRs...
December 9, 2016: Proteins
https://www.readbyqxmd.com/read/27936498/invasive-exotic-shrub-modifies-a-classic-animal-habitat-relationship-and-alters-patterns-of-vertebrate-seed-predation
#2
Peter W Guiden, John L Orrock
Recent evidence suggests that invasive exotic plants can provide novel habitats that alter animal behavior. However, it remains unclear whether classic animal-habitat associations that influence the spatial distribution of plant-animal interactions, such as small mammal use of downed woody debris, persist in invaded habitats. We removed an invasive exotic shrub (buckthorn, Rhamnus cathartica) from 7 of 15 plots in Wisconsin. In each plot, we deployed 200 tagged Quercus rubra seeds in November 2014. After five months, tags were recovered to track spatial patterns of small mammal seed predation...
December 9, 2016: Ecology
https://www.readbyqxmd.com/read/27936491/intrinsic-%C3%AE-helix-propensities-compact-hydrodynamic-radii-in-intrinsically-disordered-proteins
#3
Lance R English, Erin C Tilton, Benjamin J Ricard, Steven T Whitten
Proteins that lack tertiary stability under normal conditions, known as intrinsically disordered, exhibit a wide range of biological activities. Molecular descriptions for the biology of intrinsically disordered proteins (IDPs) consequently rely on disordered structural models, which in turn require experiments that assess the origins to structural features observed. For example, while hydrodynamic size is mostly insensitive to sequence composition in chemically denatured proteins, IDPs show strong sequence-specific effects in the hydrodynamic radius (Rh ) when measured under normal conditions...
December 9, 2016: Proteins
https://www.readbyqxmd.com/read/27936455/non-suicidal-self-injury-and-frequency-of-suicide-attempts-the-role-of-pain-persistence
#4
Keyne C Law, Lauren R Khazem, Hyejin M Jin, Michael D Anestis
BACKGROUND: Non-suicidal self-injury (NSSI) and suicidal behavior exhibit a robust association with one another. Research on the contexts within which this relationship is stronger or weaker, however, is limited. The interpersonal theory of suicidal behavior (ITS) posits that NSSI influences suicidal behavior through a habituation to physical pain and, as such, pain tolerance has been theorized to play an important role. We tested whether pain persistence, the difference between pain threshold and pain tolerance, would moderate the relationship between frequency of NSSI and suicidal behavior in both an undergraduate and community sample...
November 20, 2016: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27936452/exercise-is-an-effective-treatment-for-positive-valence-symptoms-in-major-depression
#5
Marisa Toups, Thomas Carmody, Tracy Greer, Chad Rethorst, Bruce Grannemann, Madhukar H Trivedi
INTRODUCTION: Measurement of symptoms domains and their response to treatment in relative isolation from diagnosed mental disorders has gained new urgency, as reflected by the National Institute of Mental Health's introduction of the Research Domain Criteria (RDoC). The Snaith Hamilton Pleasure Scale (SHAPS) and the Motivation and Energy Inventory (MEI) are two scales measuring positive valence symptoms. We evaluated the effect of exercise on positive valence symptoms of Major Depressive Disorder (MDD)...
October 15, 2016: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27936451/onset-polarity-in-bipolar-disorder-a-strong-association-between-first-depressive-episode-and-suicide-attempts
#6
Laura Cremaschi, Bernardo Dell'Osso, Matteo Vismara, Cristina Dobrea, Massimiliano Buoli, Terence A Ketter, A Carlo Altamura
BACKGROUND: The role of onset polarity (OP) in patients with bipolar disorder (BD) has been increasingly investigated over the last few years, for its clinical, prognostic, and therapeutic implications. The present study sought to assess whether OP was associated with specific correlates, in particular with a differential suicidal risk in BD patients. METHODS: A sample of 362 recovered BD patients was dichotomized by OP: depressed (DO) or elevated onset (EO: hypomanic/manic/mixed)...
November 30, 2016: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27936438/stressful-life-transitions-and-wellbeing-a-comparison-of-the-stress-buffering-hypothesis-and-the-social-identity-model-of-identity-change
#7
Nurul F Praharso, Morgan J Tear, Tegan Cruwys
The relationship between stressful life transitions and wellbeing is well established, however, the protective role of social connectedness has received mixed support. We test two theoretical models, the Stress Buffering Hypothesis and the Social Identity Model of Identity Change, to determine which best explains the relationship between social connectedness, stress, and wellbeing. Study 1 (N=165) was an experiment in which participants considered the impact of moving cities versus receiving a serious health diagnosis...
November 29, 2016: Psychiatry Research
https://www.readbyqxmd.com/read/27936428/dental-age-estimation-root-pulp-visibility-rpv-patterns-a-reliable-mandibular-maturity-marker-at-the-18-year-threshold
#8
Victoria S Lucas, Fraser McDonald, Manoharan Andiappan, Graham Roberts
: The purpose of this paper was to explore the potential application of Root Pulp Visibility (RPV) to determine whether or not a subject of unknown date of birth is under or over the 18year threshold. PATIENTS, MATERIALS AND METHODS: Two thousand Dental Panoramic Radiographs comprising equal numbers of females and males evenly distributed between the ages of 16 and 26 years were examined. All third molars were scored using the Anglo-Canadian 8 Stage Tooth Development system [1]...
December 6, 2016: Forensic Science International
https://www.readbyqxmd.com/read/27936422/social-network-types-among-older-korean-adults-associations-with-subjective-health
#9
Sung Yun Sohn, Won-Tak Joo, Woo Jung Kim, Se Joo Kim, Yoosik Youm, Hyeon Chang Kim, Yeong-Ran Park, Eun Lee
With population aging now a global phenomenon, the health of older adults is becoming an increasingly important issue. Because the Korean population is aging at an unprecedented rate, preparing for public health problems associated with old age is particularly salient in this country. As the physical and mental health of older adults is related to their social relationships, investigating the social networks of older adults and their relationship to health status is important for establishing public health policies...
December 1, 2016: Social Science & Medicine
https://www.readbyqxmd.com/read/27936414/-am-i-too-emotional-for-this-job-an-exploration-of-student-midwives-experiences-of-coping-with-traumatic-events-in-the-labour-ward
#10
Liz Coldridge, Sarah Davies
BACKGROUND: midwifery is emotionally challenging work, and learning to be a midwife brings its own particular challenges. For the student midwife, clinical placement in a hospital labour ward is especially demanding. In the context of organisational tensions and pressures the experience of supporting women through the unpredictable intensity of the labour process can be a significant source of stress for student midwives. Although increasing attention is now being paid to midwives' traumatic experiences and wellbeing few researchers have examined the traumatic experiences of student midwives...
November 28, 2016: Midwifery
https://www.readbyqxmd.com/read/27936411/a-network-analysis-of-dsm-5-posttraumatic-stress-disorder-symptoms-and-correlates-in-u-s-military-veterans
#11
Cherie Armour, Eiko I Fried, Marie K Deserno, Jack Tsai, Robert H Pietrzak
OBJECTIVE: Recent developments in psychometrics enable the application of network models to analyze psychological disorders, such as PTSD. Instead of understanding symptoms as indicators of an underlying common cause, this approach suggests symptoms co-occur in syndromes due to causal interactions. The current study has two goals: (1) examine the network structure among the 20 DSM-5 PTSD symptoms, and (2) incorporate clinically relevant variables to the network to investigate whether PTSD symptoms exhibit differential relationships with suicidal ideation, depression, anxiety, physical functioning/quality of life (QoL), mental functioning/QoL, age, and sex...
November 27, 2016: Journal of Anxiety Disorders
https://www.readbyqxmd.com/read/27936410/body-image-and-emotional-distress-in-newly-diagnosed-cancer-patients-the-mediating-role-of-dysfunctional-attitudes-and-rumination
#12
Jianlin Liu, Chao Xu Peh, Rathi Mahendran
Body image concerns (BIC) has been reported to be associated with emotional distress for cancers across various sites. This study sought to examine two cognitive vulnerability mechanisms: dysfunctional attitudes and rumination, and their combined effects on the relationship between BIC and emotional distress in newly diagnosed Asian cancer patients. Participants were 221 newly diagnosed adult cancer patients who were assessed on BIC, rumination, dysfunctional attitudes, and emotional distress. Path analysis was used to examine the hypothesized mediation model...
December 6, 2016: Body Image
https://www.readbyqxmd.com/read/27936409/is-body-shame-a-significant-mediator-of-the-relationship-between-mindfulness-skills-and-the-quality-of-life-of-treatment-seeking-children-and-adolescents-with-overweight-and-obesity
#13
Helena Moreira, Maria Cristina Canavarro
This study aimed to examine (a) whether mindfulness skills were associated with higher quality of life through lower body shame for treatment-seeking children/adolescents with overweight and obesity and (b) whether this indirect effect was moderated by children/adolescents' age and gender. The sample included 153 children/adolescents with overweight/obesity followed in individual nutrition consultations. Participants completed self-report measures of mindfulness, body shame, and quality of life. Moderated mediation analyses showed that higher levels of mindfulness were associated with better perceived quality of life through lower body shame, but only among girls...
December 6, 2016: Body Image
https://www.readbyqxmd.com/read/27936407/sentence-context-influences-the-subjective-perception-of-foreign-accents
#14
Sara Incera, Amee P Shah, Conor T McLennan, Matthew T Wetzel
We examined whether sentence context (the predictability of the final word) influences listeners' ratings of foreign-accented words. Previous work has demonstrated that accent manipulations affect listeners' processing of spoken language. We examined the converse of this relationship; whether context manipulations affect listeners' perceptions of accents. If there is a bidirectional relationship, listeners should be more likely to rate an accent as strong when the accented word is not predicted by the sentence...
December 6, 2016: Acta Psychologica
https://www.readbyqxmd.com/read/27936385/interrater-reliability-in-pediatric-urodynamic-tracings-a-pilot-study
#15
Anne G Dudley, Daniel P Casella, Chelsea J Lauderdale, Shilin Zhao, Heidi Chen, Stacy T Tanaka, John C Thomas, John C Pope, Mark C Adams, John W Brock, Chevis N Shannon, Douglass B Clayton
PURPOSE: Urodynamic studies are crucial to neuropathic bladder management and they often determine surgical intervention. However, current evidence indicates that interpretations show poor agreement across physicians. We sought to determine the interrater reliability of urodynamic interpretation in our practice. We hypothesized that there would be strong correlation among pediatric urologists of similar training in a single academic practice. MATERIALS AND METHODS: We retrospectively identified patients with neuropathic bladder who underwent urodynamics at our institution between 2014 and 2015...
December 6, 2016: Journal of Urology
https://www.readbyqxmd.com/read/27936371/testing-cross-sectional-and-prospective-mediators-of-internalized-heterosexism-on-heavy-drinking-alcohol-problems-and-psychological-distress-among-heavy-drinking-men-who-have-sex-with-men
#16
Alexis Kuerbis, Ethan H Mereish, Marie Hayes, Christine M Davis, Sijing Shao, Jon Morgenstern
OBJECTIVE: Minority stress theory is one of the primary theories used to understand substance use among lesbian, gay, and bisexual populations. This study tested whether drinking to cope with stress (DTC), loneliness, and gay community participation (GCP) mediated the relationship between one type of minority stress (i.e., internalized heterosexism) and behavioral health outcomes. METHOD: Using secondary data analysis and the PROCESS procedure, relationships between internalized heterosexism, the mediators (DTC, loneliness, and GCP), and outcomes (heavy drinking, alcohol problems, and psychological distress) were explored, both cross-sectionally and in a lagged manner, among both treatment-seeking and non-treatment-seeking problem drinking men who have sex with men...
January 2017: Journal of Studies on Alcohol and Drugs
https://www.readbyqxmd.com/read/27936369/the-association-between-body-image-and-behavioral-misperception-bibm-and-alcohol-use-among-high-school-girls-results-from-the-2013-youth-risk-behavioral-survey
#17
Anna C Schlissel, Taylort T Schwartz, Margie R Skeer
OBJECTIVE: The need to be thin is pervasive in adolescent culture and is associated with increased risk outcomes among adolescent girls. Body image and behavioral misperception (BIBM) exists when there is a disconnect between body weight perception and actions taken related to perceived weight status. To understand this further, we examined the relationship between BIBM and alcohol use among high school girls in the United States. METHOD: Using 2013 Youth Risk Behavior Survey data, we ran survey-weighted multivariable logistic regression analyses to examine BIBM and (a) lifetime alcohol use, (b) current alcohol use, and (c) current heavy episodic drinking (≥5 drinks in a few hours) among female high school students (N = 6,579)...
January 2017: Journal of Studies on Alcohol and Drugs
https://www.readbyqxmd.com/read/27936363/predictors-of-patterns-of-alcohol-related-blackouts-over-time-in-youth-from-the-collaborative-study-of-the-genetics-of-alcoholism-the-roles-of-genetics-and-cannabis
#18
Marc A Schuckit, Tom L Smith, Alexandra Shafir, Peyton Clausen, George Danko, Priscila Dib Gonçalves, Robert M Anthenelli, Grace Chan, Samuel Kuperman, Michie Hesselbrock, Victor Hesselbrock, John Kramer, Kathleen K Bucholz
OBJECTIVE: Alcohol-related blackouts (ARBs) are anterograde amnesias related to heavy alcohol intake seen in about 50% of drinkers. Although a major determinant of ARBs relates to blood alcohol concentrations, additional contributions come from genetic vulnerabilities and possible impacts of cannabis use disorders (CUDs). We evaluated relationships of genetics and cannabis use to latent class trajectories of ARBs in 829 subjects from the Collaborative Study of the Genetics of Alcoholism (COGA)...
January 2017: Journal of Studies on Alcohol and Drugs
https://www.readbyqxmd.com/read/27936361/the-relationship-between-drinking-pattern-social-capital-and-area-deprivation-findings-from-the-health-survey-for-england
#19
Linda Ng Fat, Shaun Scholes, Stephen Jivraj
OBJECTIVE: The purpose of this study was to establish the relationships between heavy episodic and drinking frequency with area-deprivation and social capital in England. METHOD: Using the Health Survey for England 2002-2006, a nationally representative crosssectional survey (N = 54,422), multilevel logistic regression models with individuals nested within primary sampling units were carried out, stratified by sex, on (a) drinkers versus nondrinkers, (b) heavy episodic drinking versus drinking less (on the heaviest drinking day), and (c) fewer than 2 drink-free days versus at least 2 drink-free days...
January 2017: Journal of Studies on Alcohol and Drugs
https://www.readbyqxmd.com/read/27936331/parenting-emerging-adults-who-game-excessively-parents-lived-experiences
#20
Linda L H Russell, Elizabeth I Johnson
Excessive gaming among emerging adults is a growing concern, especially in cases where it interferes with key developmental milestones such as gaining an education or establishing a career. Although researchers have begun to understand the effects of excessive gaming on young people themselves, we know remarkably little about how emerging adults' gaming may affect family relationships. Utilizing phenomenological interviewing of parents of emerging adult sons who game excessively, this study presents a rich description of the experience of parenting a young adult who games excessively...
December 9, 2016: Issues in Mental Health Nursing
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