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Structural vulnerability

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https://www.readbyqxmd.com/read/28649324/conceptualising-the-interactive-effects-of-climate-change-and-biological-invasions-on-subarctic-freshwater-fish
#1
REVIEW
Robert J Rolls, Brian Hayden, Kimmo K Kahilainen
Climate change and species invasions represent key threats to global biodiversity. Subarctic freshwaters are sentinels for understanding both stressors because the effects of climate change are disproportionately strong at high latitudes and invasion of temperate species is prevalent. Here, we summarize the environmental effects of climate change and illustrate the ecological responses of freshwater fishes to these effects, spanning individual, population, community and ecosystem levels. Climate change is modifying hydrological cycles across atmospheric, terrestrial and aquatic components of subarctic ecosystems, causing increases in ambient water temperature and nutrient availability...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28648734/drug-induced-hemolytic-anemia-pharmacological-aspects
#2
D Renard, A Rosselet
Drug-induced hemolytic anemia is a very rare but potentially lethal adverse drug reaction, which can take the form of oxidative damage to vulnerable erythrocytes (as in glucose-6-phosphate dehydrogenase deficiency), drug-induced thrombotic microangiopathy, or immune-mediated hemolytic anemia. For each form, distinctive drugs are documented as potential triggers. When a formal diagnosis of hemolytic anemia is made following drug administration, a structured approach is recommended to assess the plausibility of an adverse drug reaction based on chronological sequence, epidemiological data, objective evidence (when available), and ruling out of non-drug causes...
June 22, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28647642/a-model-of-how-targeted-and-universal-welfare-entitlements-impact-on-material-psycho-social-and-structural-determinants-of-health-in-older-adults
#3
Judith Green, Stefanie Buckner, Sarah Milton, Katie Powell, Sarah Salway, Suzanne Moffatt
A growing body of research attests to the impact of welfare regimes on health and health equity. However, the mechanisms that link different kinds of welfare entitlement to health outcomes are less well understood. This study analysed the accounts of 29 older adults in England to delineate how the form of entitlement to welfare and other resources (specifically, whether this was understood as a universal entitlement or as targeted to those in need) impacts on the determinants of health. Mechanisms directly affecting access to material resources (through deterring uptake of benefits) have been well documented, but those that operate through psychosocial and more structural pathways less so, in part because they are more challenging to identify...
June 15, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28646519/the-association-of-health-literacy-with-preventable-ed-visits-a-cross-sectional-study
#4
Meenakshi P Balakrishnan, Jill Boylston Herndon, Jingnan Zhang, Thomas Payton, Jonathan Shuster, Donna L Carden
BACKGROUND: Policy-makers argue that emergency department (ED) visits for conditions preventable with high-quality outpatient care contribute to waste in the healthcare system. However, access to ambulatory care is uneven, especially for vulnerable populations like minorities, the poor and those with limited health literacy. The impact of limited health literacy on ED visits that are preventable with timely, high-quality ambulatory care is unknown. OBJECTIVE: To determine the association of health literacy and preventable ED visits...
June 24, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/28646350/abnormal-rich-club-organization-associated-with-compromised-cognitive-function-in-patients-with-schizophrenia-and-their-unaffected-parents
#5
Xin Zhao, Lin Tian, Jun Yan, Weihua Yue, Hao Yan, Dai Zhang
Schizophrenia is considered to be a disorder of brain connectivity, which might result from a disproportionally impaired rich-club organization. The rich-club is composed of highly interconnected hub regions that play crucial roles in integrating information between different brain regions. Few studies have yet investigated whether the structural rich-club organization is impaired in patients and their first-degree relatives. In this study, we established a weighted network model of white matter connections using diffusion tensor imaging of 19 patients and 39 unaffected parents, 22 young healthy controls for the patients, and 25 old healthy controls for the parents...
June 23, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28642732/autonomic-function-impairment-and-brain-perfusion-deficit-in-parkinson-s-disease
#6
Wei-Che Lin, Pei-Chin Chen, Chih-Cheng Huang, Nai-Wen Tsai, Hsiu-Ling Chen, Hung-Chen Wang, Kun-Hsien Chou, Meng-Hsiang Chen, Yi-Wen Chen, Cheng-Hsien Lu
INTRODUCTION: Autonomic disorders have been recognized as important Parkinson's disease (PD) components. Some vulnerable structures are related to the central autonomic network and have also been linked to autonomic function alterations. The aims of the study are to evaluate the severity of the autonomic dysfunction and the cortical hypoperfusion using arterial spin labeling (ASL) MRI. And then, possible relationships of significant between-group differences in perfusion pattern to clinical variables and autonomic functions were examined to determine the pharmaceutical effects of dopaminergic treatment on cerebral blood flow (CBF) in patients with PD...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28640664/%C3%A2-somos-iguales-using-a-structural-violence-framework-to-understand-gender-and-health-inequities-from-an-intersectional-perspective-in-the-peruvian-amazon
#7
Geordan D Shannon, Angelica Motta, Carlos F Cáceres, Jolene Skordis-Worrall, Diana Bowie, Audrey Prost
BACKGROUND: In the Peruvian Amazon, historical events of colonization and political marginalization intersect with identities of ethnicity, class and geography in the construction of gender and health inequities. Gender-based inequalities can manifest in poor health outcomes via discriminatory practices, healthcare system imbalances, inequities in health research, and differential exposures and vulnerabilities to diseases. Structural violence is a comprehensive framework to explain the mechanisms by which social forces such as poverty, racism and gender inequity become embodied as individual experiences and health outcomes, and thus may be a useful tool in structuring an intersectional analysis of gender and health inequities in Amazonian Peru...
January 2017: Global Health Action
https://www.readbyqxmd.com/read/28640596/drug-target-kinetics-in-drug-discovery
#8
Peter J Tonge
The development of therapies for the treatment of neurological cancer faces a number of major challenges including the synthesis of small molecule agents that can penetrate the blood brain barrier (BBB). Given the likelihood that in many cases drug exposure will be lower in the CNS than in systemic circulation, it follows that strategies should be employed that can sustain target engagement at low drug concentration. Time dependent target occupancy is a function of both the drug and target concentration as well as the thermodynamic and kinetic parameters that describe the binding reaction coordinate, and sustained target occupancy can be achieved through structural modifications that increase target (re)binding and/or that decrease the rate of drug dissociation...
June 22, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28639528/challenges-in-accessing-and-interviewing-participants-with-severe-mental-illness
#9
Daniel Newman, Pauline O'Reilly, Siew Hwa Lee, Catriona Kennedy
Background Interviews are widely used in qualitative research to collect data. However, little has been written about interviewing people with severe mental illness (SMI). Aim To report and analyse an experience of addressing the ethical and practical challenges of interviewing people with SMI. Discussion Semi-structured interviews were conducted as part of a doctoral study to explore how service users and healthcare professionals built relationships with each other. Conclusion Although interviewing participants with SMI was challenging, rich data illustrating their experiences were gathered...
June 22, 2017: Nurse Researcher
https://www.readbyqxmd.com/read/28639361/experiences-and-needs-of-relatives-of-people-with-dementia-in-acute-hospitals-a-meta-synthesis-of-qualitative-studies
#10
REVIEW
Melanie Burgstaller, Hanna Mayer, Cornel Schiess, Susi Saxer
AIMS AND OBJECTIVES: The purpose of this meta-synthesis was to present an in-depth analysis of existing qualitative literature concerning experiences and needs of the relatives of patients with dementia in hospitals. BACKGROUND: Relatives are an important resource for the care of patients with dementia in hospitals. They provide necessary information about the patient and can support the patient's care. Simultaneously, they are themselves vulnerable, having specific needs and experiences...
June 21, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28639344/intensive-care-nurses-experiences-of-caring-for-obese-intensive-care-patients-a-hermeneutic-study
#11
Nastasja Robstad, Ulrika Söderhamn, Liv Fegran
AIM AND OBJECTIVES: To obtain a deeper understanding of qualified intensive care nurses' experiences of caring for obese patients in intensive care. BACKGROUND: Admission of obese patients with complex health care needs to intensive care units is increasing. Caring for obese critically ill patients can be challenging and demanding for the intensive care nurse because of the patients' weight, critical situation, and physical challenges. There is a gap in knowledge at present about qualified intensive care nurses' experiences of caring for obese patients in intensive care units...
June 21, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28639003/the-crucial-role-of-activin-a-alk4-pathway-in-the-pathogenesis-of-ang-ii-induced-atrial-fibrosis-and-vulnerability-to-atrial-fibrillation
#12
Qian Wang, Ying Yu, Pengpai Zhang, Yihe Chen, Changyi Li, Jie Chen, Yuepeng Wang, Yigang Li
Atrial fibrosis, the hallmark of structural remodeling associated with atrial fibrillation (AF), is characterized by abnormal proliferation of atrial fibroblasts and excessive deposition of extracellular matrix. Transforming growth factor-β1 (TGF-β1)/activin receptor-like kinase 5 (ALK5)/Smad2/3/4 pathway has been reported to be involved in the process. Recent studies have implicated both activin A and its specific downstream component activin receptor-like kinase 4 (ALK4) in stimulating fibrosis in non-cardiac organs...
July 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28636917/kinesin-processivity-is-determined-by-a-kinetic-race-from-a-vulnerable-one-head-bound-state
#13
Keith J Mickolajczyk, William O Hancock
Kinesin processivity, defined as the average number of steps that occur per interaction with a microtubule, is an important biophysical determinant of the motor's intracellular capabilities. Despite its fundamental importance to the diversity of tasks that kinesins carry out in cells, no existing quantitative model fully explains how structural differences between kinesins alter kinetic rates in the ATPase cycle to produce functional changes in processivity. Here we use high-resolution single-molecule microscopy to directly observe the stepping behavior of kinesin-1 and -2 family motors with different length neck-linker domains...
June 20, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28636199/widespread-occurrence-and-potential-for-biodegradation-of-bioactive-contaminants-in-congaree-national-park-usa
#14
Paul M Bradley, William A Battaglin, Jimmy M Clark, Frank Henning, Michelle L Hladik, Luke R Iwanowicz, Celeste A Journey, Jeffrey W Riley, Kristin M Romanok
Organic contaminants with designed molecular bioactivity, such as pesticides and pharmaceuticals, originate from human and agricultural sources, occur frequently in surface waters, and threaten the structure and function of aquatic and terrestrial ecosystems. Congaree National Park in South Carolina (USA) is a vulnerable park unit due to its location downstream of multiple urban and agricultural contaminant sources and its hydrologic setting, being composed almost entirely of floodplain and aquatic environments...
June 21, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28633499/lateralized-basal-ganglia-vulnerability-to-pesticide-exposure-in-asymptomatic-agricultural-workers
#15
Mechelle M Lewis, Nicholas W Sterling, Guangwei Du, Eun-Young Lee, Grace Shyu, Michael Goldenberg, Thomas Allen, Christy Stetter, Lan Kong, Shedra Amy Snipes, Byron C Jones, Honglei Chen, Richard B Mailman, Xuemei Huang
Background: Pesticide exposure is linked to Parkinson's disease (PD), a neurodegenerative disorder marked by dopamine cell loss in the substantia nigra of the basal ganglia (BG) that often presents asymmetrically. We previously reported that pesticide-exposed agricultural workers (AW) have nigral diffusion tensor (DTI) changes. The current study sought to confirm this finding, and explore its hemisphere and regional specificity within BG structures using an independent sample population...
June 19, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28625574/rapamycin-decreased-blood-brain-barrier-permeability-in-control-but-not-in-diabetic-rats-in-early-cerebral-ischemia
#16
Oak Z Chi, Geza K Kiss, Scott J Mellender, Xia Liu, Harvey R Weiss
Diabetes causes functional and structural changes in blood-brain barrier (BBB). The mammalian target of rapamycin (mTOR) has been associated with glucose metabolism, diabetes, and altering BBB permeability. Since there is only a narrow therapeutic window (3h) for stroke victims, it is important to investigate BBB disruption in the early stage of cerebral ischemia. We compared the degree of BBB disruption in diabetic and in control rats at two hours of reperfusion after one hour of middle cerebral artery (MCA) occlusion with or without inhibition of mTOR...
June 15, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28625189/influence-of-early-maladaptive-schemas-depression-and-anxiety-on-the-intensity-of-self-reported-cognitive-complaint-in-older-adults-with-subjective-cognitive-decline
#17
Caroline Tandetnik, Thierry Hergueta, Philippe Bonnet, Bruno Dubois, Catherine Bungener
BACKGROUND: Subjective cognitive decline (SCD) designates a self-reported cognitive decline despite preserved cognitive abilities. This study aims to explore, in older adults with SCD, the association between intensity of self-reported cognitive complaint and psychological factors including Young's early maladaptive schemas (EMSs) (i.e. enduring cognitive structures giving rise to beliefs about oneself and the world), as well as depression and anxiety. METHODS: Seventy-six subjects (69...
June 19, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28622158/general-anesthesia-and-young-brain-what-is-new
#18
Vesna Jevtovic-Todorovic, Ansgar Brambrick
Considering that growing population of very young children is exposed to general anesthesia every year, it is of utmost importance to understand how and whether such practice may affect the development and growth of their very immature and vulnerable brains. Compelling evidence from animal studies suggests that an early exposure to general anesthesia is detrimental to normal brain development leading to structural and functional impairments of neurons and glia, and long-lasting impairments in normal emotional and cognitive development...
June 15, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28622067/opioid-involved-overdose-among-male-afghanistan-iraq-era-u-s-military-veterans-a-multidimensional-perspective
#19
Alex S Bennett, Luther Elliott, Andrew Golub, Brett Wolfson-Stofko, Honoria Guarino
BACKGROUND: Mirroring nationwide trends in a broad range of U.S. populations, an alarming number of Afghanistan/Iraq-era U.S. Military veterans have experienced opioid-related overdoses. A growing body of research has examined the proximal behaviors that can precipitate an overdose; considerably less is known about more distal physiological, psychosocial and structural influences on these risk behaviors. OBJECTIVES: This study adopts a multidimensional approach to better understand opioid-related overdose among U...
June 16, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28618290/defining-trauma-in-complex-care-management-safety-net-providers-perspectives-on-structural-vulnerability-and-time
#20
Ariana Thompson-Lastad, Irene H Yen, Mark D Fleming, Meredith Van Natta, Sara Rubin, Janet K Shim, Nancy J Burke
In this paper, we delineate how staff of two complex care management (CCM) programs in urban safety net hospitals in the United States understand trauma. We seek to (1) describe how staff in CCM programs talk about trauma in their patients' lives; (2) discuss how trauma concepts allow staff to understand patients' symptoms, health-related behaviors, and responses to care as results of structural conditions; and (3) delineate the mismatch between long-term needs of patients with histories of trauma and the short-term interventions that CCM programs provide...
June 12, 2017: Social Science & Medicine
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