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https://www.readbyqxmd.com/read/29166599/maturation-of-cerebellar-purkinje-cell-population-activity-during-postnatal-refinement-of-climbing-fiber-network
#1
Jean-Marc Good, Michael Mahoney, Taisuke Miyazaki, Kenji F Tanaka, Kenji Sakimura, Masahiko Watanabe, Kazuo Kitamura, Masanobu Kano
Neural circuits undergo massive refinements during postnatal development. In the developing cerebellum, the climbing fiber (CF) to Purkinje cell (PC) network is drastically reshaped by eliminating early-formed redundant CF to PC synapses. To investigate the impact of CF network refinement on PC population activity during postnatal development, we monitored spontaneous CF responses in neighboring PCs and the activity of populations of nearby CF terminals using in vivo two-photon calcium imaging. Population activity is highly synchronized in newborn mice, and the degree of synchrony gradually declines during the first postnatal week in PCs and, to a lesser extent, in CF terminals...
November 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/29166592/hiv-envelope-glycoform-heterogeneity-and-localized-diversity-govern-the-initiation-and-maturation-of-a-v2-apex-broadly-neutralizing-antibody-lineage
#2
Elise Landais, Ben Murrell, Bryan Briney, Sasha Murrell, Kimmo Rantalainen, Zachary T Berndsen, Alejandra Ramos, Lalinda Wickramasinghe, Melissa Laird Smith, Kemal Eren, Natalia de Val, Mengyu Wu, Audrey Cappelletti, Jeffrey Umotoy, Yolanda Lie, Terri Wrin, Paul Algate, Po-Ying Chan-Hui, Etienne Karita, Andrew B Ward, Ian A Wilson, Dennis R Burton, Davey Smith, Sergei L Kosakovsky Pond, Pascal Poignard
Understanding how broadly neutralizing antibodies (bnAbs) to HIV envelope (Env) develop during natural infection can help guide the rational design of an HIV vaccine. Here, we described a bnAb lineage targeting the Env V2 apex and the Ab-Env co-evolution that led to development of neutralization breadth. The lineage Abs bore an anionic heavy chain complementarity-determining region 3 (CDRH3) of 25 amino acids, among the shortest known for this class of Abs, and achieved breadth with only 10% nucleotide somatic hypermutation and no insertions or deletions...
November 21, 2017: Immunity
https://www.readbyqxmd.com/read/29166490/-guidelines-for-a-line-of-care-for-children-and-adolescents-with-complex-chronic-health-conditions
#3
Martha Cristina Nunes Moreira, Lidianne Vianna Albernaz, Miriam Ribeiro Calheiros de Sá, Roberta Fernandes Correia, Roberta Falcão Tanabe
The definition of complex chronic health condition (CCHC) is important for identifying children and adolescents occupying pediatric beds in Brazilian hospitals, where they live out their childhood, requiring complex care by multidisciplinary teams in network format both in-hospital and in home care. The current article addresses guidelines for a line of care for children and adolescents with CCHCs. An expert panel validated 13 guidelines organized in three dimensions. Using the consensus conference technique, experts from different specialties validated the guidelines...
November 21, 2017: Cadernos de Saúde Pública
https://www.readbyqxmd.com/read/29166442/depression-and-unemployment-incidence-rate-evolution-in-portugal-1995-2013-general-practitioner-sentinel-network-data
#4
Ana Paula Rodrigues, Mafalda Sousa-Uva, Rita Fonseca, Sara Marques, Nuno Pina, Carlos Matias-Dias
OBJECTIVE: Quantify, for both genders, the correlation between the depression incidence rate and the unemployment rate in Portugal between 1995 and 2013. METHODS: An ecological study was developed to correlate the evolution of the depression incidence rates estimated by the General Practitioner Sentinel Network and the annual unemployment rates provided by the National Statistical Institute in official publications. RESULTS: There was a positive correlation between the depression incidence rate and the unemployment rate in Portugal, which was significant only for males (R2 = 0...
November 17, 2017: Revista de Saúde Pública
https://www.readbyqxmd.com/read/29166289/a-statistical-method-for-analysing-cospeciation-in-tritrophic-ecology-using-electrical-circuit-theory
#5
Colleen Nooney, Stuart Barber, Arief Gusnanto, Walter R Gilks
We introduce a new method to test efficiently for cospeciation in tritrophic systems. Our method utilises an analogy with electrical circuit theory to reduce higher order systems into bitrophic data sets that retain the information of the original system. We use a sophisticated permutation scheme that weights interactions between two trophic layers based on their connection to the third layer in the system. Our method has several advantages compared to the method of Mramba et al. [Mramba, L. K., S. Barber, K...
November 22, 2017: Statistical Applications in Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29166245/evidence-supporting-li-rads-major-features-for-ct-and-mr-imaging-based-diagnosis-of-hepatocellular-carcinoma-a-systematic-review
#6
An Tang, Mustafa R Bashir, Michael T Corwin, Irene Cruite, Christoph F Dietrich, Richard K G Do, Eric C Ehman, Kathryn J Fowler, Hero K Hussain, Reena C Jha, Adib R Karam, Adrija Mamidipalli, Robert M Marks, Donald G Mitchell, Tara A Morgan, Michael A Ohliger, Amol Shah, Kim-Nhien Vu, Claude B Sirlin
The Liver Imaging Reporting and Data System (LI-RADS) standardizes the interpretation, reporting, and data collection for imaging examinations in patients at risk for hepatocellular carcinoma (HCC). It assigns category codes reflecting relative probability of HCC to imaging-detected liver observations based on major and ancillary imaging features. LI-RADS also includes imaging features suggesting malignancy other than HCC. Supported and endorsed by the American College of Radiology (ACR), the system has been developed by a committee of radiologists, hepatologists, pathologists, surgeons, lexicon experts, and ACR staff, with input from the American Association for the Study of Liver Diseases and the Organ Procurement Transplantation Network/United Network for Organ Sharing...
November 21, 2017: Radiology
https://www.readbyqxmd.com/read/29166243/building-capacity-for-evidence-based-public-health-reconciling-the-pulls-of-practice-and-the-push-of-research
#7
Ross C Brownson, Jonathan E Fielding, Lawrence W Green
Timely implementation of principles of evidence-based public health (EBPH) is critical for bridging the gap between discovery of new knowledge and its application. Public health organizations need sufficient capacity (the availability of resources, structures, and workforce to plan, deliver, and evaluate the preventive dose of an evidence-based intervention) to move science to practice. We review principles of EBPH, the importance of capacity building to advance evidence-based approaches, promising approaches for capacity building, and future areas for research and practice...
November 20, 2017: Annual Review of Public Health
https://www.readbyqxmd.com/read/29166214/gaming-out-online-black-lesbian-identity-development-and-community-building-in-xbox-live
#8
Kishonna L Gray
As gaming culture continues to marginalize women and people of color, other gamers are also highlighting the inequalities they face within digital gaming communities. While heterosexism and homophobia are commonplace within gaming culture, little is known about the actual experiences of "gaymers" and even less about "gaymers" of color. As such, this article seeks to explore lesbians of color and their experiences "gayming" out and online. Exploring identity development, community building, and connectivity via social networking, the women within this study articulate what it means to be lesbian online and how this impacts their physical and digital experiences...
November 22, 2017: Journal of Lesbian Studies
https://www.readbyqxmd.com/read/29166159/local-regulation-of-trail-networks-of-the-arboreal-turtle-ant-cephalotes-goniodontus
#9
Deborah M Gordon
This study examines how an arboreal ant colony maintains, extends, and repairs its network of foraging trails and nests, built on a network of vegetation. Nodes are junctions where a branch forks off from another or where a branch of one plant touching another provides a new edge on which ants could travel. The ants' choice of edge at a node appears to be reinforced by trail pheromone. Ongoing pruning of the network tends to eliminate cycles and minimize the number of nodes and thus decision points, but not the distance traveled...
December 2017: American Naturalist
https://www.readbyqxmd.com/read/29166147/preliminary-results-of-lung-cancer-screening-in-a-socioeconomically-disadvantaged-population
#10
Phillip L Guichet, Beringia Y Liu, Bhushan Desai, Zul Surani, Steven Y Cen, Christopher Lee
OBJECTIVE: The objective of our study was to describe the preliminary results of our clinical low-dose CT (LDCT) lung cancer screening program targeting a minority, socioeconomically disadvantaged, high-risk population different from that studied in the National Lung Screening Trial (NLST). MATERIALS AND METHODS: Community partner clinics in an underserved region of south Los Angeles County referred interested candidates to our program. All patients met National Comprehensive Cancer Network eligibility criteria for lung cancer screening...
November 22, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29166142/effects-of-dose-escalated-radiotherapy-in-combination-with-long-term-androgen-deprivation-on-prostate-cancer
#11
Natsuo Tomita, Norihito Soga, Yuji Ogura, Jun Furusawa, Hidetoshi Shimizu, Sou Adachi, Hiroshi Tanaka, Daiki Kato, Yutaro Koide, Chiyoko Makita, Hiroyuki Tachibana, Takeshi Kodaira
OBJECTIVE: We aimed to examine the effects of a dose escalation for prostate cancer patients receiving long-term androgen deprivation therapy (ADT). METHODS: A retrospective analysis of 605 patients treated with radiotherapy and long-term ADT (National Comprehensive Cancer Network criteria-defined intermediate-risk; minimum 10 months, high-risk and very-high-risk; minimum 20 months) was performed. The median ADT time was 31 months. Cox's proportional-hazards models were used to compare biochemical disease-free survival (bDFS), clinical relapse-free survival (cRFS), and overall survival (OS) between the ≥ 70, < 78 Gy group and 78 Gy group in a univariate analysis and to assess the effects of the dose escalation on bDFS in a multivariate analysis...
November 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/29166134/injection-partners-hcv-and-hiv-status-among-rural-persons-who-inject-drugs-in-puerto-rico
#12
Patrick Habecker, Roberto Abadie, Melissa Welch-Lazoritz, Juan Carlos Reyes, Bilal Khan, Kirk Dombrowski
BACKGROUND: The prevalence of hepatitis C (HCV) and HIV among persons who inject drugs (PWID) and the ability of these diseases to spread through injection networks are well documented in urban areas. However, less is known about injection behaviors in rural areas. OBJECTIVES: This study focuses on the association between the number of self-reported injection partners with the PWID's self-reported HCV and HIV status. Injection networks provide paths for infection and information to flow, and are important to consider when developing prevention and intervention strategies...
November 22, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/29166120/mechanical-response-of-transient-telechelic-networks-with-many-part-stickers
#13
Michelle K Sing, Jorge Ramírez, Bradley D Olsen
A central question in soft matter is understanding how several individual, weak bonds act together to produce collective interactions. Here, gel-forming telechelic polymers with multiple stickers at each chain end are studied through Brownian dynamics simulations to understand how collective interaction of the bonds affects mechanical response of the gels. These polymers are modeled as finitely extensible dumbbells using an explicit tau-leap algorithm and the binding energy of these associations was kept constant regardless of the number of stickers...
November 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29166086/focused-conformational-sampling-in-proteins
#14
Marco Bacci, Cassiano Langini, Jiří Vymětal, Amedeo Caflisch, Andreas Vitalis
A detailed understanding of the conformational dynamics of biological molecules is difficult to obtain by experimental techniques due to resolution limitations in both time and space. Computer simulations avoid these in theory but are often too short to sample rare events reliably. Here we show that the progress index-guided sampling (PIGS) protocol can be used to enhance the sampling of rare events in selected parts of biomolecules without perturbing the remainder of the system. The method is very easy to use as it only requires as essential input a set of several features representing the parts of interest sufficiently...
November 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29166041/molecular-origin-of-aging-of-pure-se-glass-growth-of-inter-chain-structural-correlations-network-compaction-and-partial-ordering
#15
S Dash, P Chen, P Boolchand
Glass transition width W of pure Se narrows from 7.1(3) °C to 1.5(2) °C and the non-reversing enthalpy of relaxation (ΔHnr) at Tg increases from 0.23(5) cal/g to 0.90(5) cal/g upon room temperature aging for 4 months in the dark as examined in modulated differential scanning colorimetry (MDSC) at low scan rates. In Raman scattering, such aging leads the A1 mode of Sen-chains (near 250 cm(-1)) to narrow by 26% and its scattering strength to decrease as the strength of modes of correlated chains (near 235 cm(-1)) and of Se8 rings (near 264 cm(-1)) systematically grows...
June 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29166037/adenosine-triphosphate-diffusion-through-poly-ethylene-glycol-diacrylate-hydrogels-can-be-tuned-by-cross-link-density-as-measured-by-pfg-nmr
#16
Günter Majer, Alexander Southan
The diffusion of small molecules through hydrogels is of great importance for many applications. Especially in biological contexts, the diffusion of nutrients through hydrogel networks defines whether cells can survive inside the hydrogel or not. In this contribution, hydrogels based on poly(ethylene glycol) diacrylate with mesh sizes ranging from ξ = 1.1 to 12.9 nm are prepared using polymers with number-average molecular weights between Mn = 700 and 8000 g/mol. Precise measurements of diffusion coefficients D of adenosine triphosphate (ATP), an important energy carrier in biological systems, in these hydrogels are performed by pulsed field gradient nuclear magnetic resonance...
June 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29166011/a-cooperative-folding-unit-as-the-structural-link-for-energetic-coupling-within-a-protein
#17
Nathan W Gardner, Sarah M McGinness, Jainik Panchal, Elizabeth M Topp, Chiwook Park
Previously, we demonstrated that ligand binding to Escherichia coli cofactor-dependent phosphoglycerate mutase (dPGM), a homodimeric protein, is energetically coupled with dimerization. The equilibrium unfolding of dPGM occurs with a stable, monomeric intermediate. Binding of several non-substrate metabolites stabilizes the dimeric native form over the monomeric intermediate, reducing the population of the intermediate. Both the active site and the dimer interface appear to be unfolded in the intermediate. We hypothesized that a loop containing residues 118-152 was responsible for the energetic coupling between the dimer interface and the distal active site and was unfolded in the intermediate...
November 22, 2017: Biochemistry
https://www.readbyqxmd.com/read/29165920/diabetes-related-complications-which-research-topics-matter-to-diverse-patients-and-caregivers
#18
Maman Joyce Dogba, Mylène Tantchou Dipankui, Selma Chipenda Dansokho, France Légaré, Holly O Witteman
BACKGROUND: Diabetes is a chronic disease with increasing prevalence worldwide. Although research has improved its treatment and management, little is known about which research topics matter to people living with diabetes, particularly among under-represented groups. OBJECTIVES: To explore the importance of research topics among a diverse range of people living with any type of diabetes or caring for someone living with any type of diabetes. METHODS: We used a convergent mixed-method design with quantitative and qualitative aspects...
November 22, 2017: Health Expectations: An International Journal of Public Participation in Health Care and Health Policy
https://www.readbyqxmd.com/read/29165901/influence-of-ventral-tegmental-area-input-on-cortico-subcortical-networks-underlying-action-control-and-decision-making
#19
Anja Richter, Oliver Gruber
It is argued that the mesolimbic system has a more general function in processing all salient events, including and extending beyond rewards. Saliency was defined as an event that is unexpected due to its frequency of occurrence and elicits an attentional-behavioral switch. Using functional magnetic resonance imaging (fMRI), signals were measured in response to the modulation of salience of rewarding and nonrewarding events during a reward-based decision making task, the so called desire-reason dilemma paradigm (DRD)...
November 22, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29165806/host-preference-and-network-properties-in-biotrophic-plant-fungal-associations
#20
Sergei Põlme, Mohammad Bahram, Hans Jacquemyn, Peter Kennedy, Petr Kohout, Mari Moora, Jane Oja, Maarja Öpik, Lorenzo Pecoraro, Leho Tedersoo
Analytical methods can offer insights into the structure of biological networks, but mechanisms that determine the structure of these networks remain unclear. We conducted a synthesis based on 111 previously published datasets to assess a range of ecological and evolutionary mechanisms that may influence the plant-associated fungal interaction networks. We calculated the relative host effect on fungal community composition and compared nestedness and modularity among different mycorrhizal types and endophytic fungal guilds...
November 22, 2017: New Phytologist
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