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Behavioral Organization

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https://www.readbyqxmd.com/read/28646215/single-molecule-and-multiple-bond-characterization-of-catch-bond-associated-cytoadhesion-in-malaria
#1
Ying Bena Lim, Juzar Thingna, Jianshu Cao, Chwee Teck Lim
The adhesion of malaria infected red blood cells (iRBCs) to host endothelial receptors in the microvasculature, or cytoadhesion, is associated with severe disease pathology such as multiple organ failure and cerebral malaria. Malaria iRBCs have been shown to bind to several receptors, of which intercellular adhesion molecule 1 (ICAM-1) upregulation in brain microvasculature is the only one correlated to cerebral malaria. We utilize a biophysical approach to study the interactions between iRBCs and ICAM-1. At the single molecule level, force spectroscopy experiments reveal that ICAM-1 forms catch bond interactions with Plasmodium falciparum parasite iRBCs...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646105/the-glycolytic-enzyme-phosphofructokinase-1-assembles-into-filaments
#2
Bradley A Webb, Anne M Dosey, Torsten Wittmann, Justin M Kollman, Diane L Barber
Despite abundant knowledge of the regulation and biochemistry of glycolytic enzymes, we have limited understanding on how they are spatially organized in the cell. Emerging evidence indicates that nonglycolytic metabolic enzymes regulating diverse pathways can assemble into polymers. We now show tetramer- and substrate-dependent filament assembly by phosphofructokinase-1 (PFK1), which is considered the "gatekeeper" of glycolysis because it catalyzes the step committing glucose to breakdown. Recombinant liver PFK1 (PFKL) isoform, but not platelet PFK1 (PFKP) or muscle PFK1 (PFKM) isoforms, assembles into filaments...
June 23, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28645891/health-app-use-among-individuals-with-symptoms-of-depression-and-anxiety-a-survey-study-with-thematic-coding
#3
Caryn Kseniya Rubanovich, David C Mohr, Stephen M Schueller
BACKGROUND: Researchers have largely turned to commercial app stores, randomized trials, and systematic reviews to make sense of the mHealth landscape. Few studies have approached understanding by collecting information from target end users. The end user perspective is critical as end user interest in and use of mHealth technologies will ultimately drive the efficacy of these tools. OBJECTIVE: The purpose of this study was to obtain information from end users of mHealth technologies to better understand the physical and mental health apps people use and for what purposes...
June 23, 2017: JMIR Mental Health
https://www.readbyqxmd.com/read/28645777/increased-food-intake-after-starvation-enhances-sleep-in-drosophila-melanogaster
#4
Josue M Regalado, McKenna B Cortez, Jeremy Grubbs, Jared A Link, Alexander van der Linden, Yong Zhang
Feeding and sleep are highly conserved, interconnected behaviors essential for survival. Starvation has been shown to potently suppress sleep across species; however, whether satiety promotes sleep is still unclear. Here we use the fruit fly, Drosophila melanogaster, as a model organism to address the interaction between feeding and sleep. We first monitored the sleep of flies that had been starved for 24 h and found that sleep amount increased in the first 4 h after flies were given food. Increased sleep after starvation was due to an increase in sleep bout number and average sleep bout length...
June 13, 2017: Journal of Genetics and Genomics, Yi Chuan Xue Bao
https://www.readbyqxmd.com/read/28645543/mechanosensing-in-the-drosophila-nervous-system
#5
REVIEW
Katerina Karkali, Enrique Martin-Blanco
Neurons allocated to sense organs respond rapidly to mechanical signals dictating behavioral responses at the organism level. The receptors that transduce these signals, and underlie these senses, are mechanically gated channels. Research on mechanosensation over the past decade, employing in many cases Drosophila as a model, has focused in typifying these receptors and in exploring the different ways, depending on context, in which these mechanosensors are modulated. In this review, we discuss first what we have learned from Drosophila on these mechanisms and we describe the different mechanosensory organs present in the Drosophila larvae and adult...
June 20, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28645029/phytoavailability-of-cr-in-silene-vulgaris-the-role-of-soil-plant-genotype-and-bacterial-rhizobiome
#6
P García-Gonzalo, A E Pradas Del Real, M Pirredda, M J Gismera, M C Lobo, A Pérez-Sanz
Understanding the metal behavior at the soil-root interface is of utmost significance for a successful implementation of phytoremediation. In this study, we investigated the differences in chromium (Cr) uptake, chemical changes in soil solution and the shifts in rhizosphere bacterial communities of two genotypes of Silene vulgaris (SV21, SV38) with different tolerance to Cr. A greenhouse experiment was performed in two soils that differed on pH and organic matter (OM) content. An industrial sludge with high content in Cr was used as pollution source...
June 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28644920/genome-scale-metabolic-models-applied-to-human-health-and-disease
#7
REVIEW
Daniel J Cook, Jens Nielsen
Advances in genome sequencing, high throughput measurement of gene and protein expression levels, data accessibility, and computational power have allowed genome-scale metabolic models (GEMs) to become a useful tool for understanding metabolic alterations associated with many different diseases. Despite the proven utility of GEMs, researchers confront multiple challenges in the use of GEMs, their application to human health and disease, and their construction and simulation in an organ-specific and disease-specific manner...
June 23, 2017: Wiley Interdisciplinary Reviews. Systems Biology and Medicine
https://www.readbyqxmd.com/read/28644891/the-impact-of-changes-in-dietary-knowledge-on-adult-overweight-and-obesity-in-china
#8
Lin Zhou, Qiyan Zeng, Shaosheng Jin, Guangyan Cheng
Overweight and obesity are rapidly growing threats in China. Improvement in dietary knowledge can potentially prevent overweight and obesity, conditions which are receiving substantial attention from international organizations and governments. The purpose of this study was to investigate the impact of changes in dietary knowledge on adult overweight and obesity, using a balanced panel data consisting of 10,401 samples from the 2006, 2009, and 2011 iterations of the China Health and Nutrition Survey. Results indicate that overweight and obesity are becoming increasingly problematic in China, and the level of dietary knowledge among Chinese adults needs improvement...
2017: PloS One
https://www.readbyqxmd.com/read/28644395/optical-tracking-and-digital-quantification-of-beating-behavior-in-bioengineered-human-cardiac-organoids
#9
Mahesh Devarasetty, Steven Forsythe, Thomas D Shupe, Shay Soker, Colin E Bishop, Anthony Atala, Aleksander Skardal
Organoid and organ-on-a-chip technologies are rapidly advancing towards deployment for drug and toxicology screening applications. Liver and cardiac toxicities account for the majority of drug candidate failures in human trials. Liver toxicity generally produces liver cell death, while cardiac toxicity causes adverse changes in heart beat kinetics. In traditional 2D cultures, beating kinetics can be measured by electrode arrays, but in some 3D constructs, quantifying beating kinetics can be more challenging...
June 23, 2017: Biosensors
https://www.readbyqxmd.com/read/28643268/sexual-health-in-a-social-and-cultural-context-a-qualitative-study-of-young-latina-lesbian-bisexual-and-queer-women
#10
Christie A Santos, Emily C Williams, Julius Rodriguez, India J Ornelas
Previous research on sexual minority and Latina women suggests that Latina lesbian, bisexual, and queer (LBQ) women may be at high risk for sexually associated and transmitted infections, but research on the sexual health and practices of this population is limited. This qualitative study explored the knowledge, attitudes, and values related to sexual health among a purposive sample of Latina LBQ women living in Seattle, WA. Latina LBQ women (N = 14) were recruited to participate in in-depth interviews about their sexual health through community organizations, flyers posted on college campuses, email and social media advertisements, and participant referrals...
June 22, 2017: Journal of Racial and Ethnic Health Disparities
https://www.readbyqxmd.com/read/28642724/i-don-t-want-to-miss-a-thing-learning-dynamics-and-effects-of-feedback-type-and-monetary-incentive-in-a-paired-associate-deterministic-learning-task
#11
Magda Gawlowska, Ewa Beldzik, Aleksandra Domagalik, Adam Gagol, Tadeusz Marek, Justyna Mojsa-Kaja
Effective functioning in a complex environment requires adjusting of behavior according to changing situational demands. To do so, organisms must learn new, more adaptive behaviors by extracting the necessary information from externally provided feedback. Not surprisingly, feedback-guided learning has been extensively studied using multiple research paradigms. The purpose of the present study was to test the newly designed Paired Associate Deterministic Learning task (PADL), in which participants were presented with either positive or negative deterministic feedback...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28642080/impact-of-juvenile-chronic-stress-on-adult-cortico-accumbal-function-implications-for-cognition-and-addiction
#12
REVIEW
Michael J Watt, Matthew A Weber, Shaydel R Davies, Gina L Forster
Repeated exposure to stress during childhood is associated with increased risk for neuropsychiatric illness, substance use disorders and other behavioral problems in adulthood. However, it is not clear how chronic childhood stress can lead to emergence of such a wide range of symptoms and disorders in later life. One possible explanation lies in stress-induced disruption to the development of specific brain regions associated with executive function and reward processing, deficits in which are common to the disorders promoted by childhood stress...
June 19, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28641965/animal-models-of-psychoactive-drug-use-and-addiction-present-problems-and-future-needs-for-translational-approaches
#13
REVIEW
Christian P Müller
Drug addiction is a psychiatric disorder based on a dysfunction of the brain. It frequently develops from a controlled drug consumption and drug instrumentalization (DI). Thereby, DI is the use of a drug to improve specific non-drug related behaviors, beyond the drug's direct positive or negative reinforcing effects. Currently available pharmacotherapies for drug addiction show low effect size and rather limited long-term efficacy, which suggests that current theories on addiction are still insufficient in how they capture the phenomenon and how they allow predictions for highly efficient treatments...
June 19, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28641183/size-partitioning-and-mixing-behavior-of-trace-metals-and-dissolved-organic-matter-in-a-south-china-estuary
#14
Wenhao Wang, Min Chen, Laodong Guo, Wen-Xiong Wang
The Jiulong River estuary, located in the southeastern China, suffered from metal pollution due to industrial effluent releases. Mixing of effluent and estuarine water may have significantly affected the size distribution of trace metals and their environmental fate. In the present study, colloidal size distribution of organic matter and selected metals were quantified using asymmetric flow field-flow fractionation (AF4) and ICP-MS. We demonstrated a dominance of dissolved metals in the 1-10kDa fraction, and metals such as Cu, Zn, Ni, Co, Pb, Cd and Mn were mostly regulated by terrestrial fulvic acid...
June 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28640972/understanding-adaptogenic-activity-specificity-of-the-pharmacological-action-of-adaptogens-and-other-phytochemicals
#15
REVIEW
Alexander Panossian
Adaptogens are stress-response modifiers that increase an organism's nonspecific resistance to stress by increasing its ability to adapt and survive. The classical reductionist model is insufficiently complex to explain the mechanistic aspects of the physiological notion of "adaptability" and the adaptogenic activity of adaptogens. Here, I demonstrate that (1) the mechanisms of action of adaptogens are impossible to rationally describe using the reductionist concept of pharmacology, whereas the network pharmacology approach is the most suitable method; and (2) the principles of systems biology and pharmacological networks appear to be more suitable for conceptualizing adaptogen function and are applicable to any phytochemical...
June 22, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28640532/nonvolatile-perovskite-based-photomemory-with-a-multilevel-memory-behavior
#16
Jung-Yao Chen, Yu-Cheng Chiu, Yen-Ting Li, Chu-Chen Chueh, Wen-Chang Chen
Solution-processable organic-inorganic hybrid perovskite materials with a wealth of exotic semiconducting properties have appeared as the promising front-runners for next-generation electronic devices. Further, regarding its well photoresponsibility, various perovskite-based photosensing devices are prosperously developed in recent years. However, most exploited devices to date only transiently transduce the optical signals into electrical circuits while under illumination, which necessitates using additional converters to further store the output signals for recording the occurrence of light stimulation...
June 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28640031/identifying-gaps-in-the-performance-of-pediatric-trainees-who-receive-marginal-unsatisfactory-ratings
#17
Su-Ting T Li, Daniel J Tancredi, Alan Schwartz, Ann Guillot, Ann Burke, R Franklin Trimm, Susan Guralnick, John D Mahan, Kimberly A Gifford
PURPOSE: To perform a derivation study to determine in which subcompetencies marginal/unsatisfactory pediatric residents had the greatest deficits compared with their satisfactorily performing peers and which subcompetencies best discriminated between marginal/unsatisfactory and satisfactorily performing residents. METHOD: Multi-institutional cohort study of all 21 milestones (rated on four or five levels) reported to the Accreditation Council for Graduate Medical Education, and global marginal/unsatisfactory versus satisfactory performance reported to the American Board of Pediatrics...
June 20, 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28640014/potential-impact-of-risk-and-loss-aversion-on-the-process-of-accepting-kidneys-for-transplantation
#18
Raymond L Heilman, Ellen P Green, Kunam S Reddy, Adyr Moss, Bruce Kaplan
Behavioral economic theory suggests that people make decisions based on maximizing perceived value; however, this may be influenced more by the risk of loss rather than of potential gain. Additionally, individuals may seek certainty over uncertainty. These are termed loss aversion and risk aversion, respectively. Loss aversion is particularly sensitive to how the decision is "framed." Thus, labeling a kidney as high Kidney Donor Profile Index results in higher discard rates because this creates a nonlinearity in perceived risk...
July 2017: Transplantation
https://www.readbyqxmd.com/read/28638800/prostatic-adenocarcinoma-oncocytic-variant-case-report-and-literature-review
#19
Matthew M Klairmont, Nadeem Zafar
The oncocytic variant of prostatic adenocarcinoma is exceptionally rare with only 4 cases reported in the English literature. Little is known about the clinical behavior of this variant of prostatic adenocarcinoma, because of the exceptionally low number of reported cases. The 2016 World Health Organization Classification of Tumors of Prostate does not recognize the oncocytic variant, again likely related to the exceptional paucity of reported cases. Here, we report the fifth case of the oncocytic variant of acinar type prostatic adenocarcinoma in an asymptomatic 64-year-old Caucasian American male with elevated serum prostate specific antigen (7...
June 10, 2017: World Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28638781/bioinspired-mechano-sensitive-macroporous-ceramic-sponge-for-logical-drug-and-cell-delivery
#20
Changlu Xu, Zhihao Wei, Huajian Gao, Yanjie Bai, Huiling Liu, Huilin Yang, Yuekun Lai, Lei Yang
On-demand, ultrahigh precision delivery of molecules and cells assisted by scaffold is a pivotal theme in the field of controlled release, but it remains extremely challenging for ceramic-based macroporous scaffolds that are prevalently used in regenerative medicine. Sea sponges (Phylum Porifera), whose bodies possess hierarchical pores or channels and organic/inorganic composite structures, can delicately control water intake/circulation and therefore achieve high precision mass transportation of food, oxygen, and wastes...
June 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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