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Journal of the Royal Society, Interface

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https://www.readbyqxmd.com/read/28446704/preservation-of-protein-expression-systems-at-elevated-temperatures-for-portable-therapeutic-production
#1
David K Karig, Seneca Bessling, Peter Thielen, Sherry Zhang, Joshua Wolfe
Many biotechnology capabilities are limited by stringent storage needs of reagents, largely prohibiting use outside of specialized laboratories. Focusing on a large class of protein-based biotechnology applications, we address this issue by developing a method for preserving cell-free protein expression systems for months above room temperature. Our approach realizes unprecedented long-term stability at elevated temperatures by leveraging the sugar alcohol trehalose, a simple, low-cost, open-air drying step, and strategic separation of reaction components during drying...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28446703/efficient-use-of-sentinel-sites-detection-of-invasive-honeybee-pests-and-diseases-in-the-uk
#2
Matt J Keeling, Samik Datta, Daniel N Franklin, Ivor Flatman, Andy Wattam, Mike Brown, Giles E Budge
Sentinel sites, where problems can be identified early or investigated in detail, form an important part of planning for exotic disease outbreaks in humans, livestock and plants. Key questions are: how many sentinels are required, where should they be positioned and how effective are they at rapidly identifying new invasions? The sentinel apiary system for invasive honeybee pests and diseases illustrates the costs and benefits of such approaches. Here, we address these issues with two mathematical modelling approaches...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28446702/alteration-of-cerebrovascular-haemodynamic-patterns-due-to-atrial-fibrillation-an-in-silico-investigation
#3
S Scarsoglio, A Saglietto, M Anselmino, F Gaita, L Ridolfi
There has recently been growing evidence that atrial fibrillation (AF), the most common cardiac arrhythmia, is independently associated with the risk of dementia. This represents a very recent frontier with high social impact for the number of individuals involved and for the expected increase in AF incidence in the next 40 years. Although a number of potential haemodynamic processes, such as microembolisms, altered cerebral blood flow, hypoperfusion and microbleeds, arise as connecting links between the two pathologies, the causal mechanisms are far from clear...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28424305/numerical-simulation-of-haemodynamics-and-low-density-lipoprotein-transport-in-the-rabbit-aorta-and-their-correlation-with-atherosclerotic-plaque-thickness
#4
Xiaoyin Li, Xiao Liu, Peng Zhang, Chenglong Feng, Anqiang Sun, Hongyan Kang, Xiaoyan Deng, Yubo Fan
Two mechanisms of shear stress and mass transport have been recognized to play an important role in the development of localized atherosclerosis. However, their relationship and roles in atherogenesis are still obscure. It is necessary to investigate quantitatively the correlation among low-density lipoproteins (LDL) transport, haemodynamic parameters and plaque thickness. We simulated blood flow and LDL transport in rabbit aorta using computational fluid dynamics and evaluated plaque thickness in the aorta of a high-fat-diet rabbit...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28424304/giant-axonal-neuropathy-alters-the-structure-of-keratin-intermediate-filaments-in-human-hair
#5
Asfia Soomro, Richard J Alsop, Atsuko Negishi, Laurent Kreplak, Douglas Fudge, Edward R Kuczmarski, Robert D Goldman, Maikel C Rheinstädter
Giant axonal neuropathy (GAN) follows an autosomal recessive genetic inheritance and impedes the peripheral and central nervous system due to axonal swellings that are packed with neurofilaments. The patients display a number of phenotypes, including hypotonia, muscle weakness, decreased reflexes, ataxia, seizures, intellectual disability, pale skin and often curled hair. We used X-ray diffraction and tensile testing to determine potential changes to the structure of keratin intermediate filaments (IFs) in the hair of patients with GAN...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28424303/distribution-of-genotype-network-sizes-in-sequence-to-structure-genotype-phenotype-maps
#6
Susanna Manrubia, José A Cuesta
An essential quantity to ensure evolvability of populations is the navigability of the genotype space. Navigability, understood as the ease with which alternative phenotypes are reached, relies on the existence of sufficiently large and mutually attainable genotype networks. The size of genotype networks (e.g. the number of RNA sequences folding into a particular secondary structure or the number of DNA sequences coding for the same protein structure) is astronomically large in all functional molecules investigated: an exhaustive experimental or computational study of all RNA folds or all protein structures becomes impossible even for moderately long sequences...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28404872/synthetic-associative-learning-in-engineered-multicellular-consortia
#7
Javier Macia, Blai Vidiella, Ricard V Solé
Associative learning (AL) is one of the key mechanisms displayed by living organisms in order to adapt to their changing environments. It was recognized early as a general trait of complex multicellular organisms but is also found in 'simpler' ones. It has also been explored within synthetic biology using molecular circuits that are directly inspired in neural network models of conditioning. These designs involve complex wiring diagrams to be implemented within one single cell, and the presence of diverse molecular wires become a challenge that might be very difficult to overcome...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28404871/on-the-biomechanical-analysis-of-the-calories-expended-in-a-straight-boxing-jab
#8
T I Zohdi
Boxing and related sports activities have become a standard workout regime at many fitness studios worldwide. Oftentimes, people are interested in the calories expended during these workouts. This note focuses on determining the calories in a boxer's jab, using kinematic vector-loop relations and basic work-energy principles. Numerical simulations are undertaken to illustrate the basic model. Multi-limb extensions of the model are also discussed.
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28404870/enhancing-regenerative-approaches-with-nanoparticles
#9
REVIEW
Sabine van Rijt, Pamela Habibovic
In this review, we discuss recent developments in the field of nanoparticles and their use in tissue regeneration approaches. Owing to their unique chemical properties and flexibility in design, nanoparticles can be used as drug delivery systems, to create novel features within materials or as bioimaging agents, or indeed these properties can be combined to create smart multifunctional structures. This review aims to provide an overview of this research field where the focus will be on nanoparticle-based strategies to stimulate bone regeneration; however, the same principles can be applied for other tissue and organ regeneration strategies...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28404869/histology-based-homogenization-analysis-of-soft-tissue-application-to-prostate-cancer
#10
Javier Palacio-Torralba, Daniel W Good, S Alan McNeill, Robert L Reuben, Yuhang Chen
It is well known that the changes in tissue microstructure associated with certain pathophysiological conditions can influence its mechanical properties. Quantitatively relating the tissue microstructure to the macroscopic mechanical properties could lead to significant improvements in clinical diagnosis, especially when the mechanical properties of the tissue are used as diagnostic indices such as in digital rectal examination and elastography. In this study, a novel method of imposing periodic boundary conditions in non-periodic finite-element meshes is presented...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28404868/collective-benefits-in-traffic-during-mega-events-via-the-use-of-information-technologies
#11
Yanyan Xu, Marta C González
Information technologies today can inform each of us about the route with the shortest time, but they do not contain incentives to manage travellers such that we all get collective benefits in travel times. To that end we need travel demand estimates and target strategies to reduce the traffic volume from the congested roads during peak hours in a feasible way. During large events, the traffic inconveniences in large cities are unusually high, yet temporary, and the entire population may be more willing to adopt collective recommendations for collective benefits in traffic...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28404867/dynamic-cellular-finite-element-method-for-modelling-large-scale-cell-migration-and-proliferation-under-the-control-of-mechanical-and-biochemical-cues-a-study-of-re-epithelialization
#12
Jieling Zhao, Youfang Cao, Luisa A DiPietro, Jie Liang
Computational modelling of cells can reveal insight into the mechanisms of the important processes of tissue development. However, current cell models have limitations and are challenged to model detailed changes in cellular shapes and physical mechanics when thousands of migrating and interacting cells need to be modelled. Here we describe a novel dynamic cellular finite-element model (DyCelFEM), which accounts for changes in cellular shapes and mechanics. It also models the full range of cell motion, from movements of individual cells to collective cell migrations...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28381644/correction-to-control-and-regulation-of-pathways-via-negative-feedback
#13
H M Sauro
No abstract text is available yet for this article.
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28381643/quantification-of-the-efficacy-of-collagen-cross-linking-agents-to-induce-stiffening-of-rat-sclera
#14
Ian C Campbell, Bailey G Hannon, A Thomas Read, Joseph M Sherwood, Stephen A Schwaner, C Ross Ethier
The concept of scleral stiffening therapies has emerged as a novel theoretical approach for treating the ocular disorders glaucoma and myopia. Deformation of specific regions of the posterior eye is innately involved in the pathophysiology of these diseases, and thus targeted scleral stiffening could resist these changes and slow or prevent progression of these diseases. Here, we present the first systematic screen and direct comparison of the stiffening effect of small molecule collagen cross-linking agents in the posterior globe, namely using glyceraldehyde, genipin and methylglyoxal (also called pyruvaldehyde)...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28381642/voltage-dependent-k-channels-improve-the-energy-efficiency-of-signalling-in-blowfly-photoreceptors
#15
Francisco J H Heras, John Anderson, Simon B Laughlin, Jeremy E Niven
Voltage-dependent conductances in many spiking neurons are tuned to reduce action potential energy consumption, so improving the energy efficiency of spike coding. However, the contribution of voltage-dependent conductances to the energy efficiency of analogue coding, by graded potentials in dendrites and non-spiking neurons, remains unclear. We investigate the contribution of voltage-dependent conductances to the energy efficiency of analogue coding by modelling blowfly R1-6 photoreceptor membrane. Two voltage-dependent delayed rectifier K(+) conductances (DRs) shape the membrane's voltage response and contribute to light adaptation...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28381641/exploring-the-high-resolution-mapping-of-gender-disaggregated-development-indicators
#16
C Bosco, V Alegana, T Bird, C Pezzulo, L Bengtsson, A Sorichetta, J Steele, G Hornby, C Ruktanonchai, N Ruktanonchai, E Wetter, A J Tatem
Improved understanding of geographical variation and inequity in health status, wealth and access to resources within countries is increasingly being recognized as central to meeting development goals. Development and health indicators assessed at national or subnational scale can often conceal important inequities, with the rural poor often least well represented. The ability to target limited resources is fundamental, especially in an international context where funding for health and development comes under pressure...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28356540/population-genetics-of-immune-related-multilocus-copy-number-variation-in-native-americans
#17
Luciana W Zuccherato, Silvana Schneider, Eduardo Tarazona-Santos, Robert J Hardwick, Douglas E Berg, Helen Bogle, Mateus H Gouveia, Lee R Machado, Moara Machado, Fernanda Rodrigues-Soares, Giordano B Soares-Souza, Diego L Togni, Roxana Zamudio, Robert H Gilman, Denise Duarte, Edward J Hollox, Maíra R Rodrigues
While multiallelic copy number variation (mCNV) loci are a major component of genomic variation, quantifying the individual copy number of a locus and defining genotypes is challenging. Few methods exist to study how mCNV genetic diversity is apportioned within and between populations (i.e. to define the population genetic structure of mCNV). These inferences are critical in populations with a small effective size, such as Amerindians, that may not fit the Hardy-Weinberg model due to inbreeding, assortative mating, population subdivision, natural selection or a combination of these evolutionary factors...
March 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28356539/mechanisms-of-stochastic-onset-and-termination-of-atrial-fibrillation-studied-with-a-cellular-automaton-model
#18
Yen Ting Lin, Eugene T Y Chang, Julie Eatock, Tobias Galla, Richard H Clayton
Mathematical models of cardiac electrical excitation are increasingly complex, with multiscale models seeking to represent and bridge physiological behaviours across temporal and spatial scales. The increasing complexity of these models makes it computationally expensive to both evaluate long term (more than 60 s) behaviour and determine sensitivity of model outputs to inputs. This is particularly relevant in models of atrial fibrillation (AF), where individual episodes last from seconds to days, and interepisode waiting times can be minutes to months...
March 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28356538/automated-tracking-and-classification-of-the-settlement-behaviour-of-barnacle-cyprids
#19
Ahmad Alsaab, Nick Aldred, Anthony S Clare
A focus on the development of nontoxic coatings to control marine biofouling has led to increasing interest in the settlement behaviour of fouling organisms. Barnacles pose a significant fouling challenge and accordingly the behaviour of their settlement-stage cypris larva (cyprid) has attracted much attention, yet remains poorly understood. Tracking technologies have been developed that quantify cyprid movement, but none have successfully automated data acquisition over the prolonged periods necessary to capture and identify the full repertoire of behaviours, from alighting on a surface to permanent attachment...
March 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28330991/limb-flexion-induced-twist-and-associated-intramural-stresses-in-the-human-femoropopliteal-artery
#20
Anastasia Desyatova, William Poulson, Paul Deegan, Carol Lomneth, Andreas Seas, Kaspars Maleckis, Jason MacTaggart, Alexey Kamenskiy
High failure rates of femoropopliteal artery (FPA) interventions are often attributed to severe mechanical deformations that occur with limb movement. Torsion of the FPA likely plays a significant role, but is poorly characterized and the associated intramural stresses are currently unknown. FPA torsion in the walking, sitting and gardening postures was characterized in n = 28 in situ FPAs using intra-arterial markers. Principal mechanical stresses and strains were quantified in the superficial femoral artery (SFA), adductor hiatus segment (AH) and the popliteal artery (PA) using analytical modelling...
March 2017: Journal of the Royal Society, Interface
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