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https://www.readbyqxmd.com/read/28924669/measuring-nanometer-distances-between-fluorescent-labels-step-by-step
#1
Susanna Maria Früh, Ingmar Schoen
Super-resolution fluorescence microscopy methods are increasingly applied to study the structure of biological molecules within their natural context or at biomaterial interfaces. We here provide a protocol for Single-molecule High-Resolution Imaging with Photobleaching (SHRImP) that can be used to obtain information about the conformation of large proteins or other macromolecules at the single-molecule level. This procedure requires site-specific protein labeling with fluorescent dyes, immobilization and sample preparation, optimization of imaging buffer composition and microscope settings, and acquisition of short time-lapse movies that capture the stepwise bleaching behavior of individual molecules...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28918768/postnatal-developmental-changes-in-fractal-complexity-of-giemsa-stained-chromatin-in-mice-spleen-follicular-cells
#2
Igor Pantic, Jovana Paunovic, Danijela Vucevic, Tatjana Radosavljevic, Stefan Dugalic, Anita Petkovic, Sanja Radojevic-Skodric, Senka Pantic
Although there are numerous recent works focusing on fractal properties of DNA and chromatin, many issues regarding changes in chromatin fractality during physiological aging remain unclear. In this study, we present results indicating that in mice, there is an age-related reduction of chromatin fractal complexity in a population of spleen follicular cells (SFCs). Spleen tissue was obtained from 16 mice and fixated in Carnoy solution. The youngest animal was newborn, and each animal was exactly 1 month older than the previous...
September 18, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28917377/the-effect-of-a-beeswax-olive-oil-and-alkanna-tinctoria-l-tausch-mixture-on-burn-injuries-an-experimental-study-with-a-control-group
#3
Kenan Gümüş, Zeynep Karaman Özlü
OBJECTIVES: This study was planned to investigate the effect of a mixture of beeswax, olive oil and A. Tinctoria (L.) Tausch on burn wounds to determine the impact on burn healing, pain during dressing changes and duration of hospital stay. METHODS: The study was conducted between May 2014 and August 2015 in the Burn Unit of Ataturk University Research Hospital. The sample of this experimental study consisted of 64 patients (31 experimental group and 33 control group) who met its inclusion criteria...
October 2017: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/28916864/sparticle-an-algorithm-for-the-analysis-of-filamentous-microorganisms-in-submerged-cultures
#4
Joost Willemse, Ferhat Büke, Dino van Dissel, Sanne Grevink, Dennis Claessen, Gilles P van Wezel
Streptomycetes are filamentous bacteria that produce a plethora of bioactive natural products and industrial enzymes. Their mycelial lifestyle typically results in high heterogeneity in bioreactors, with morphologies ranging from fragments and open mycelial mats to dense pellets. There is a strong correlation between morphology and production in submerged cultures, with small and open mycelia favouring enzyme production, while most antibiotics are produced mainly in pellets. Here we describe SParticle, a Streptomyces Particle analysis method that combines whole slide imaging with automated image analysis to characterize the morphology of submerged grown Streptomyces cultures...
September 15, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28914578/the-choroidal-vascularity-index-decreases-and-choroidal-thickness-increases-in-vogt-koyanagi-harada-disease-patients-during-a-recurrent-anterior-uveitis-attack
#5
Shulin Liu, Liping Du, Qingyun Zhou, Qi Zhang, Ke Hu, Jian Qi, Liang Liang, Chunjiang Zhou, Aize Kijlstra, Peizeng Yang
PURPOSE: To measure changes in the choroidal vascularity index (CVI) in chronic Vogt-Koyanagi-Harada (VKH) disease during a recurrent anterior uveitis attack. METHODS: Forty VKH patients and 40 normal controls were included in this study. Choroidal images were recorded before and during a recurrent anterior uveitis attack, as well as after appropriate treatment. CVI was measured by the binarization technique using ImageJ software (Bethesda, MD). RESULTS: The CVI was 0...
September 15, 2017: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/28913554/reliability-of-size-and-echo-intensity-of-abdominal-skeletal-muscles-using-extended-field-of-view-ultrasound-imaging
#6
Noriko I Tanaka, Madoka Ogawa, Akito Yoshiko, Ryosuke Ando, Hiroshi Akima
PURPOSE: This study aimed to examine the reliability of extended field-of-view (EFOV) ultrasound imaging to evaluate the cross-sectional area (CSA) and echo intensity of abdominal skeletal muscles. METHODS: Twenty-seven healthy young males (age 18.6 ± 1.0 years, body mass index 20.9 ± 2.8 kg/m(2), waist circumference 75.0 ± 7.9 cm, body fat 16.6 ± 5.9%) visited the laboratory on 2 days. EFOV ultrasound images of the rectus abdominis, abdominal oblique, and erector spinae muscles were acquired at the height of the third lumbar vertebra with the subject lying on a bed...
September 14, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28910205/gender-differences-in-the-relationship-between-sex-hormone-deficiency-and-soft-drusen
#7
Han Jo Kwon, Seung Min Lee, Kang Yeun Pak, Sung Who Park, Ji Eun Lee, Ik Soo Byon
PURPOSE: To investigate the association between sex hormone deficiency and soft drusen in women and men. MATERIALS AND METHODS: We retrospectively reviewed the medical records and fundus photographs of subjects who underwent a health screening for additional examination of climacterium and age-related changes including sex hormone status. In women, sex hormone deficiency was defined as cessation of menstruation that had lasted for at least 12 months and follicular stimulating hormone (FSH) levels ≥ 25 mIU/mL; in men, it was defined as testosterone levels ≤ 3...
September 14, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28910175/neurotrophic-keratopathy-therapeutic-approach-using-a-novel-matrix-regenerating-agent
#8
Marta Guerra, Sara Marques, João Quadrado Gil, Joana Campos, Paula Ramos, Andreia Martins Rosa, Maria João Quadrado, Joaquim Neto Murta
PURPOSE: To evaluate the efficacy and tolerance of a new matrix-regenerating agent (RGTA), Cacicol(®), a polymer that mimics heparan sulfates bound to extracellular matrix proteins, avoiding its proteolysis, to treat neurotrophic keratopathy (NK). METHODS: Uncontrolled prospective clinical study performed between January 2014 and May 2016. Twenty-five patients (25 eyes) with corneal neurotrophic ulcers, nonresponsive to at least 2 weeks of conservative therapy, were treated with Cacicol, instilled once/twice a week...
September 14, 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28882303/digital-quantification-of-neurite-outgrowth-and-retraction-by-phase-contrast-microscopy-a-tau-perspective
#9
Brett Cook, Duncan Proctor, Rachel Bromberg, Nichole E LaPointe, Stuart C Feinstein, Leslie Wilson
The proper organization and function of the mammalian nervous system relies on neuronal processes or "neurites," extended morphological projections that include axons and dendrites. Tau is a structural microtubule-associated protein that is widely expressed in the nervous system that mediates the establishment of cell polarity, neurite outgrowth, and axonal transport. A useful model for studying the establishment and maintenance of these neuronal structures are rat neuronal PC12 cells, which can be induced to express tau and project neurites by treating the cells with nerve growth factor...
2017: Methods in Cell Biology
https://www.readbyqxmd.com/read/28882302/tirf-assays-for-real-time-observation-of-microtubules-and-actin-coassembly-deciphering-tau-effects-on-microtubule-actin-interplay
#10
Eléa Prezel, Virginie Stoppin-Mellet, Auréliane Elie, Ninon Zala, Eric Denarier, Laurence Serre, Isabelle Arnal
Microtubule and actin cytoskeletons are key players in vital processes in cells. Although the importance of microtubule-actin interaction for cell development and function has been highlighted for years, the properties of these two cytoskeletons have been mostly studied separately. Thus we now need procedures to simultaneously assess actin and microtubule properties to decipher the basic mechanisms underlying microtubule-actin crosstalk. Here we describe an in vitro assay that allows the coassembly of both filaments and the real-time observation of their interaction by TIRF microscopy...
2017: Methods in Cell Biology
https://www.readbyqxmd.com/read/28881424/anatomic-relationship-of-the-first-olfactory-neuron-and-trochlea-cadaveric-study-with-surgical-implications
#11
Philip Locker, Max Plitt, Peter Papagiannopoulos, Ryan Smith, Bobby A Tajudeen
BACKGROUND: Iatrogenic injury to the trochlea is a potential complication of the Draf III or endoscopic modified Lothrop procedure; however, the location of the trochlea from within the sinus cavity has yet to be clearly characterized. We performed the first cadaveric study assessing the position of the trochlea in relation to the first olfactory neuron, a commonly identified landmark during the Draf III procedure. METHODS: Thirteen external dissections of the trochlea were performed on 7 disarticulated cadaveric heads via an extended Lynch type incision...
September 7, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28863910/influence-of-cortical-bone-thickness-on-miniscrew-microcrack-formation
#12
Melissa V Nguyen, John Codrington, Lloyd Fletcher, Craig W Dreyer, Wayne J Sampson
INTRODUCTION: The aim of this in-vitro study was to investigate the influence of cortical bone thickness on the amount of surface microdamage produced after insertion of orthodontic miniscrews (OM) in porcine tibia bone. METHODS: Aarhus OMs (Medicon, Tuttlingen, Germany; diameter, 1.5 mm; length, 6 mm) were inserted into 1.0 mm (group A; n = 10), 1.5 mm (group B; n = 10), and 2.0 mm (group C; n = 10) of porcine cortical bone using a torque-limiting hand screwdriver set at 18 Ncm...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28854801/rgb-color-coded-images-in-scanning-electron-microscopy-of-biological-surfaces
#13
O Kofroňová, O Benada
We present here a methodological approach for the creation of color images in scanning electron microscopy by processing grayscale images taken simultaneously from at least three different detectors in a scanning electron microscope. The final color images are then produced by merging together those grayscale images in RGB color space. We show the images from non-conductive standard sample together with those obtained from real microbiological samples. The first one represents a microbial biofilm naturally grown on fiber glass filter...
2017: Acta Virologica
https://www.readbyqxmd.com/read/28836524/qualitative-analysis-of-connective-tissue-stroma-in-different-grades-of-oral-squamous-cell-carcinoma-a-histochemical-study
#14
Smitha Kullage, Maji Jose, Vagish Kumar L Shanbhag, Riaz Abdulla
BACKGROUND: Detection of oral cancer at an early stage is of utmost importance to decrease morbidity and mortality. Tumor stroma plays a critical role during carcinogenesis. There is lack of information regarding the characteristics of the stroma in relation to the invading malignant epithelial cells and the interdependence between stroma and tumor cells in different grades of oral squamous cell carcinoma (OSCC). AIM: The present study was aimed to analyze and compare the nature of stroma in the vicinity of invading tumor islands in different grades of OSCC, using a histochemical technique picrosirius-polarization method...
July 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28835599/effect-of-a-calcium-phosphate-and-fluoride-paste-on-prevention-of-enamel-demineralization
#15
Takuya Nakata, Yuichi Kitasako, Alireza Sadr, Syozi Nakashima, Junji Tagami
This study aimed to examine the anti-demineralization capacities of (a) tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA) and 950 ppm fluoride paste, (b) casein phosphopeptide amorphous calcium phosphate paste and (c) 950 ppm fluoride solution using optical coherence tomography (OCT). Enamel blocks were cut from the bovine incisors and treated using one of the above-mentioned three materials or deionized water as control (n=10). All samples were subjected to a demineralization gel for 1 h followed by a remineralization solution for 23 h...
August 24, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28832712/different-engagement-of-tlr2-and-tlr4-in-porphyromonas-gingivalis-vs-ligature-induced-periodontal-bone-loss
#16
Mei Lin, Yang Hu, Yuhua Wang, Toshihisa Kawai, Zuomin Wang, Xiaozhe Han
This study was conducted to investigate the roles of different Toll-like receptor (TLR) signaling in Porphyromonas gingivalis (P. gingivalis)-induced and ligature-induced experimental periodontal bone resorption in mice. Wild-type (WT), TLR2 knockout (KO), TLR4KO, and TLR2&4 KO mice with C57/BL6 background were divided into three groups: control, P. gingivalis infection, and ligation. Live P. gingivalis or silk ligatures were placed in the sulcus around maxillary second molars over a 2-week period. Images were captured by digital stereomicroscopy, and the bone resorption area was measured with ImageJ software...
August 21, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28828150/the-xp-endo-finisher-for-the-removal-of-calcium-hydroxide-paste-from-root-canals-and-from-the-apical-third
#17
Rami Hamdan, Jérôme Michetti, Déborah Pinchon, Franck Diemer, Marie Georgelin-Gurgel
BACKGROUND: The aim was to compare the efficacy of the passive ultrasonic irrigation PUI and the Xp-endo Finisher (FKG-Dentaire, La-Chaux-de-Fonds, Switzerland) in removing the calcium hydroxide paste from root canals and from the apical third. MATERIAL AND METHODS: Sixty-eight root canals of single-rooted teeth were shaped using the BT-Race files (FKG-Dentaire, La-Chaux-de-Fonds, Switzerland). Ca(OH)2 was placed in all samples except for the negative control group (n=4)...
July 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28810923/the-chemokine-fractalkine-cx3cl1-attenuates-h2o2-induced-demyelination-in-cerebellar-slices
#18
Sinead A O'Sullivan, Kumlesh K Dev
BACKGROUND: Fractalkine/CX3CR1 signalling has been implicated in many neurodegenerative and neurological diseases of the central nervous system (CNS). This signalling pathway plays an important role in regulating reactive oxygen species (ROS), as well as itself being altered in conditions of oxidative stress. Here, we investigated the effects of recombinant fractalkine (rCX3CL1) in models of hydrogen peroxide (H2O2)-induced demyelination and astrocyte toxicity, within organotypic cerebellar slice cultures...
August 15, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28810820/quantitative-label-free-evaluation-of-tissue-engineered-skeletal-muscle-through-multiphoton-microscopy
#19
Brian C Syverud, Mary-Ann Mycek, Lisa Marie Larkin
The lack of tools for assessing engineered tissue viability and function in a non-invasive manner is a major regulatory and translational challenge facing tissue engineers. Label-free, nonlinear optical molecular imaging (OMI) has utilized endogenous nicotinamide adenine dinucleotide (NADH) and flavin adenine dinucleotide (FAD) fluorescence to indicate metabolic activity. Similarly, second harmonic generation (SHG) signals from myosin and collagen can measure overall muscle structural integrity and function...
August 16, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28807010/angiogenic-potency-evaluation-of-cell-therapy-candidates-by-a-novel-application-of-the-in-vitro-aortic-ring-assay
#20
Farwah Iqbal, Peter Szaraz, Matthew Librach, Andrée Gauthier-Fisher, Clifford L Librach
BACKGROUND: Due to limitations of current angiogenesis assays, we aimed to develop a novel application of the rat aortic ring assay to assess the angiogenic potential of mesenchymal stromal cells (MSCs). First-trimester human umbilical cord-derived perivascular cells (FTM HUCPVCs) have multipotent characteristics and previously demonstrated angiogenic potential. We compared the effect of this young source of MSCs and adult bone marrow stromal cells (BMSCs) on ex vivo aortic endothelial network formation...
August 14, 2017: Stem Cell Research & Therapy
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