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https://www.readbyqxmd.com/read/27921029/nanoscale-structure-and-spectroscopic-probing-of-a%C3%AE-1-40-fibril-bundle-formation
#1
Katarzyna M Psonka-Antonczyk, Per Hammarström, Leif B G Johansson, Mikael Lindgren, Bjørn T Stokke, K Peter R Nilsson, Sofie Nyström
Amyloid plaques composed of fibrillar Amyloid-β (Aβ) are hallmarks of Alzheimer's disease. However, Aβ fibrils are morphologically heterogeneous. Conformation sensitive luminescent conjugated oligothiophenes (LCOs) are versatile tools for monitoring such fibril polymorphism in vivo and in vitro. Biophysical methods applied on in vitro generated Aβ fibrils, stained with LCOs with different binding and fluorescence properties, can be used to characterize the Aβ fibrillation in depth, far beyond that possible for in vivo generated amyloid plaques...
2016: Frontiers in Chemistry
https://www.readbyqxmd.com/read/27920534/perceptions-and-impact-of-bipolar-disorder-in-japan-results-of-an-internet-survey
#2
Koichiro Watanabe, Eiji Harada, Takeshi Inoue, Yuka Tanji, Toshiaki Kikuchi
Bipolar disorder is a recurrent and episodic illness. This survey study assessed experiences and identified clinical insights of individuals with bipolar disorder. An Internet-based monitor system database was screened for patients with bipolar disorder in Japan (February and March 2013). Of 1,050 patients, 457 completed surveys, and results were analyzed with descriptive statistics. Approximately one-fourth of respondents were diagnosed with bipolar disorder on their first visit to medical institutions, although the most common initial diagnosis was depression/depressive state (65%)...
2016: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/27920041/an-adaptive-response-to-uncertainty-can-lead-to-weight-gain-during-dieting-attempts
#3
A D Higginson, J M McNamara
BACKGROUND AND OBJECTIVES: Peoples' attempts to lose weight by low calorie diets often result in weight gain because of over-compensatory overeating during lapses. Animals usually respond to a change in food availability by adjusting their foraging effort and altering how much energy reserves they store. But in many situations the long-term availability of food is uncertain, so animals may attempt to estimate it to decide the appropriate level of fat storage. METHODOLOGY: We report the results of a conceptual model of feeding in which the animal knows whether food is currently abundant or limited, but does not know the proportion of time, there will be an abundance in the long-term and has to learn it...
2016: Evolution, Medicine, and Public Health
https://www.readbyqxmd.com/read/27917410/time-lapse-in-situ-imaging-of-ice-crystal-growth-using-confocal-microscopy
#4
Moreno Marcellini, Cecile Noirjean, Dmytro Dedovets, Juliette Maria, Sylvain Deville
Ice crystals nucleate and grow when a water solution is cooled below its freezing point. The growth velocities and morphologies of the ice crystals depend on many parameters, such as the temperature of ice growth, the melting temperature, and the interactions of solutes with the growing crystals. Three types of morphologies may appear: dendritic, cellular (or fingerlike), or the faceted equilibrium form. Understanding and controlling which type of morphology is formed is essential in several domains, from biology to geophysics and materials science...
November 30, 2016: ACS Omega
https://www.readbyqxmd.com/read/27916854/fast-screening-of-antibacterial-compounds-from-fusaria
#5
Teis Esben Sondergaard, Marlene Fredborg, Ann-Maria Oppenhagen Christensen, Sofie K Damsgaard, Nikoline F Kramer, Henriette Giese, Jens Laurids Sørensen
Bio-guided screening is an important method to identify bioactive compounds from fungi. In this study we applied a fast digital time-lapse microscopic method for assessment of the antibacterial properties of secondary metabolites from the fungal genus Fusarium. Here antibacterial effects could be detected for antibiotic Y, aurofusarin, beauvericin, enniatins and fusaric acid after six hours of cultivation. The system was then used in a bio-guided screen of extracts from 14 different Fusarium species, which had been fractionated by HPLC...
November 29, 2016: Toxins
https://www.readbyqxmd.com/read/27913137/time-lapse-microscopy-patent-upheld-in-europe-response-to-pearce
#6
Sigrid Sterckx, Julian Cockbain, Guido Pennings
In this piece, we comment on the article by Pearce earlier in this journal. As Pearce correctly points out, what is fundamentally at issue in ESHRE et al's opposition to Stanford University's European patent on time-lapse microscopy is whether an exclusion from patentability, here of methods of medical diagnosis, should be interpreted narrowly or not. In the present case, the dominant piece of case law from the European Patent Office (EPO) gives a narrow interpretation of what a method of diagnosis must be in order not to be patentable...
November 16, 2016: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/27912771/a-dna-vaccine-encoding-the-viral-hemorrhagic-septicemia-virus-genotype-ivb-glycoprotein-confers-protection-in-muskellunge-esox-masquinongy-rainbow-trout-oncorhynchus-mykiss-brown-trout-salmo-trutta-and-lake-trout-salvelinus-namaycush
#7
Isaac F Standish, Elena V Millard, Travis O Brenden, Mohamed Faisal
BACKGROUND: The viral hemorrhagic septicemia virus (VHSV) is one of the most serious fish pathogens. In 2003, a novel sublineage (genotype IVb) of this deadly virus emerged in the Great Lakes basin causing serious fish kills. We have previously demonstrated that a DNA plasmid (pcDNA), containing a cytomegalovirus (CMV) promoter and the viral hemorrhagic septicemia virus (VHSV) genotype IVb glycoprotein (G) gene insert (designated pVHSivb-G) confers moderate protection in muskellunge (Esox masquinongy), a highly susceptible species upon challenge...
December 2, 2016: Virology Journal
https://www.readbyqxmd.com/read/27910904/melanosome-transfer-to-keratinocyte-in-the-chicken-embryonic-skin-is-mediated-by-vesicle-release-associated-with-rho-regulated-membrane-blebbing
#8
Ryosuke Tadokoro, Hidetaka Murai, Ken-Ichiro Sakai, Takahiro Okui, Yasuhiro Yokota, Yoshiko Takahashi
During skin pigmentation in amniotes, melanin synthesized in the melanocyte is transferred to keratinocytes by a particle called the melanosome. Previous studies, mostly using dissociated cultured cells, have proposed several different models that explain how the melanosome transfer is achieved. Here, using a technique that labels the plasma membrane of melanocytes within a three-dimensional system that mimics natural tissues, we have visualized the plasma membrane of melanocytes with EGFP in chicken embryonic skin...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910868/relationship-between-nanotopographical-alignment-and-stem-cell-fate-with-live-imaging-and-shape-analysis
#9
Peter Newman, Jorge Luis Galenano-Niño, Pamela Graney, Joselito M Razal, Andrew I Minett, João Ribas, Raquel Ovalle-Robles, Maté Biro, Hala Zreiqat
The topography of a biomaterial regulates cellular interactions and determine stem cell fate. A complete understanding of how topographical properties affect cell behavior will allow the rational design of material surfaces that elicit specified biological functions once placed in the body. To this end, we fabricate substrates with aligned or randomly organized fibrous nanostructured topographies. Culturing adipose-derived stem cells (ASCs), we explore the dynamic relationship between the alignment of topography, cell shape and cell differentiation to osteogenic and myogenic lineages...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27909339/cancer-cell-motility-lessons-from-migration-in-confined-spaces
#10
Colin D Paul, Panagiotis Mistriotis, Konstantinos Konstantopoulos
Time-lapse, deep-tissue imaging made possible by advances in intravital microscopy has demonstrated the importance of tumour cell migration through confining tracks in vivo. These tracks may either be endogenous features of tissues or be created by tumour or tumour-associated cells. Importantly, migration mechanisms through confining microenvironments are not predicted by 2D migration assays. Engineered in vitro models have been used to delineate the mechanisms of cell motility through confining spaces encountered in vivo...
December 2, 2016: Nature Reviews. Cancer
https://www.readbyqxmd.com/read/27908603/patenting-medical-diagnosis-methods-in-europe-stanford-university-and-time-lapse-microscopy
#11
Sigrid Sterckx, Julian Cockbain, Guido Pennings
In 2013, a European Patent for the technique of time-lapse microscopy was granted by the European Patent Office (EPO) to Stanford University and was subsequently opposed by Unisense FertiliTech A/S and by the European Society for Human Reproduction and Embryology (ESHRE), Sigrid Sterckx, Julian Cockbain and Guido Pennings. ESHRE et al.'s opposition was based on the argument that Stanford's patent was directed to a method of medical diagnosis, methods that are excluded from patentability by Article 53(c) of the European Patent Convention...
November 18, 2016: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/27907861/in-situ-time-lapse-study-of-extracellular-polymeric-substance-discharge-in-streptococcus-mutans-biofilm
#12
Bernard Haochih Liu, Li-Chieh Yu
Streptococcus mutans is one of the main pathogens that cause tooth decay. By metabolizing carbohydrates, S. mutans emits extracellular polymeric substance (EPS) that adheres to the tooth surface and forms layers of biofilm. Periodontal disease occurs due to the low pH environment created by S. mutans biofilm, and such an acidic environment gradually erodes tooth enamel. Since the existence of EPS is essential in the formation of biofilm, the in-situ investigation of its generation and distribution in real time is the key to the control and suppression of S...
November 24, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27906965/do-elite-and-amateur-soccer-players-outperform-non-athletes-on-neurocognitive-functioning-a-study-among-8-12-year-old-children
#13
Lot Verburgh, Erik J A Scherder, Paul A M Van Lange, Jaap Oosterlaan
AIM: Research suggested a positive association between physical fitness and neurocognitive functioning in children. Aim of the present study is to investigate possible dose-response relationships between diverse daily physical activities and a broad range of neurocognitive functions in preadolescent children. Furthermore, the relationship between several sedentary behaviours, including TV-watching, gaming and computer time, and neurocognitive functioning will be investigated in this group of children...
2016: PloS One
https://www.readbyqxmd.com/read/27899587/temporal-self-regulation-of-transposition-through-host-independent-transposase-rodlet-formation
#14
Lauren E Woodard, Laura M Downes, Yi-Chien Lee, Aparna Kaja, Eyuel S Terefe, Matthew H Wilson
Transposons are highly abundant in eukaryotic genomes, but their mobilization must be finely tuned to maintain host organism fitness and allow for transposon propagation. Forty percent of the human genome is comprised of transposable element sequences, and the most abundant cut-and-paste transposons are from the hAT superfamily. We found that the hAT transposase TcBuster from Tribolium castaneum formed filamentous structures, or rodlets, in human tissue culture cells, after gene transfer to adult mice, and ex vivo in cell-free conditions, indicating that host co-factors or cellular structures were not required for rodlet formation...
November 28, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27890929/extended-time-lapse-in-vivo-imaging-of-tibia-bone-marrow-to-visualize-dynamic-hematopoietic-stem-cell-engraftment
#15
S Kim, L Lin, G A J Brown, K Hosaka, E W Scott
Homing, engraftment and proliferation of hematopoietic stem/progenitor cell (HSC/HPCs) are crucial steps required for success of a bone marrow transplant. Observation of these critical events is limited by the opaque nature of bone. Here we demonstrate how individual HSCs engraft in long bones by thinning one side of the tibia for direct and unbiased observation. Intravital imaging enabled detailed visualization of single Sca-1(+), c-Kit(+), Lineage(-) (SKL) cell migration to bone marrow niches and subsequent proliferation to reconstitute hematopoiesis...
November 28, 2016: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/27890922/progress-in-imaging-methods-insights-gained-into-plasmodium-biology
#16
Mariana De Niz, Paul-Christian Burda, Gesine Kaiser, Hernando A Del Portillo, Tobias Spielmann, Freddy Frischknecht, Volker T Heussler
Over the past decade, major advances in imaging techniques have enhanced our understanding of Plasmodium spp. parasites and their interplay with mammalian hosts and mosquito vectors. Cryoelectron tomography, cryo-X-ray tomography and super-resolution microscopy have shifted paradigms of sporozoite and gametocyte structure, the process of erythrocyte invasion by merozoites, and the architecture of Maurer's clefts. Intravital time-lapse imaging has been revolutionary for our understanding of pre-erythrocytic stages of rodent Plasmodium parasites...
November 28, 2016: Nature Reviews. Microbiology
https://www.readbyqxmd.com/read/27889460/evaluation-of-time-lapse-for-establishing-distal-tubal-occlusion-diagnosis-during-hysterosalpingography-procedure-performed-by-using-water-soluble-contrast-media
#17
Serkan Kahyaoglu, Omer Hamid Yumusak, Inci Kahyaoglu, Gokce Naz Kucukbas, Alev Esercan, Yasemin Tasci
BACKGROUND: Hysterosalpingography (HSG) is the most frequently used diagnostic measure for simultaneously determining uterine abnormalities and tubal status among subfertile women. Despite several broader advantages such as availability and increased experience, the subjectivity involved during administration of the HSG procedure itself, and necessary imaging review, decreases the reliability and accuracy of HSG. In this study, we evaluated the time intervals between X-ray imaging during HSG procedure to establish the presence of distal tubal occlusion...
November 24, 2016: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/27888293/cytokine-induced-killer-cells-hunt-individual-cancer-cells-in-droves-in-a-mouse-model
#18
Ji Sung Kim, Yong Guk Kim, Hong Kyung Lee, Eun Jae Park, Boyeong Kim, Jong Soon Kang, Heesoon Lee, Youngsoo Kim, Jin Tae Hong, Sang-Bae Han
Cytotoxicity of cytokine-induced killer (CIK) cells depends mainly on their encounters with target cells, but how many CIK cells are required to kill an individual cancer cell is unknown. Here we used time-lapse imaging to quantify the critical effector cell number required to kill an individual target cell. CIK cells killed MHC-I-negative and MHC-I-positive cancer cells, but natural killer (NK) cells destroyed MHC-I-negative cells only. The average threshold number of CIK cells required to kill an individual cancer cell was 6...
November 25, 2016: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/27886235/time-lapse-3-d-measurements-of-a-glucose-biosensor-in-multicellular-spheroids-by-light-sheet-fluorescence-microscopy-in-commercial-96-well-plates
#19
Vincent Maioli, George Chennell, Hugh Sparks, Tobia Lana, Sunil Kumar, David Carling, Alessandro Sardini, Chris Dunsby
Light sheet fluorescence microscopy has previously been demonstrated on a commercially available inverted fluorescence microscope frame using the method of oblique plane microscopy (OPM). In this paper, OPM is adapted to allow time-lapse 3-D imaging of 3-D biological cultures in commercially available glass-bottomed 96-well plates using a stage-scanning OPM approach (ssOPM). Time-lapse 3-D imaging of multicellular spheroids expressing a glucose Förster resonance energy transfer (FRET) biosensor is demonstrated in 16 fields of view with image acquisition at 10 minute intervals...
November 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27885213/a-fret-biosensor-for-rock-based-on-a-consensus-substrate-sequence-identified-by-kiss-technology
#20
Chunjie Li, Ayako Imanishi, Naoki Komatsu, Kenta Terai, Mutsuki Amano, Kozo Kaibuchi, Michiyuki Matsuda
Genetically-encoded biosensors based on Förster/fluorescence resonance energy transfer (FRET) are versatile tools for studying the spatio-temporal regulation of signaling molecules within not only the cells but also tissues. Perhaps the hardest task in the development of a FRET biosensor for protein kinases is to identify the kinase-specific substrate peptide to be used in the FRET biosensor. To solve this problem, we took advantage of kinase-interacting substrate screening (KISS) technology, which deduces a consensus substrate sequence for the protein kinase of interest...
November 23, 2016: Cell Structure and Function
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