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https://www.readbyqxmd.com/read/29349512/photobiomodulation-induces-in-vitro-re-epithelialization-via-nitric-oxide-production
#1
Manuela Rizzi, Mario Migliario, Stelvio Tonello, Vincenzo Rocchetti, Filippo Renò
Photobiomodulation is a widely used tool in regenerative medicine thanks to its ability to modulate a plethora of physiological responses. Wound re-epithelialization is strictly regulated by locally produced chemical mediators, such as nitric oxide (NO), a highly reactive free radical generated by the nitric oxide synthase (NOS) enzymatic family. In this study, it has been hypothesized that a 980-nm low-level laser stimulation could increase NO production in human keratinocytes and that such event might be directly related to the re-epithelialization process...
January 18, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29344874/laser-capture-microdissection-based-rna-seq-of-barley-grain-tissues
#2
Ronny Brandt, Martin Mascher, Johannes Thiel
Spatiotemporal patterning throughout the plant body depends to a large degree on cell- and tissue-specific expression of genes. Subsequently, for a better understanding of cell and tissue differentiation processes during plant development it is important to conduct transcript analyses in individual cells or tissue types rather than in bulk tissues. Laser capture microdissection (LCM) provides a useful method for isolating specific cell types from complex tissue structures for downstream applications. Contrasting to mammalian cells, the texture of plant cells is more critical due to hard, cellulose-rich cell walls, large vacuoles, and air spaces which complicates tissue preparation and extraction of macromolecules, like DNA and RNA...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29343617/methods-to-determine-the-silicone-oil-layer-thickness-in-sprayed-on-siliconized-syringes
#3
Viviane Loosli, Oliver Germershaus, Henrik Steinberg, Sascha Dreher, Ulla Grauschopf, Stefanie Funke
The silicone lubricant layer in prefilled syringes (PFS) has been investigated with regards to siliconization process performance, PFS functionality and drug product attributes such as subvisible particle levels in several studies in the past. However, adequate methods to characterize the silicone oil layer thickness and -distribution are limited and systematic evaluation is missing. In this study, white light interferometry (WLI) was evaluated to close this gap in method understanding. WLI demonstrated a good accuracy of 93-99 % for MgF2 coated, curved standards covering a thickness range of 115-473 nm...
January 17, 2018: PDA Journal of Pharmaceutical Science and Technology
https://www.readbyqxmd.com/read/29341853/influence-of-high-heat-load-on-flow-and-containment-of-an-inclined-air-curtain-iac-fume-hood
#4
Rong Fung Huang, Ching Min Hsu, Kai Ling Lin
The inclined air-curtain (IAC) fume hood has been reported to have "almost null leakage"(1) at low suction flow rates when operated at regular temperatures. However, previous research has not investigated the performance or optimized operating parameters when a high heat load is used in the IAC fume hood. For the present work, the effects of a high heat load on the flow field and contaminant leakage characteristics of the IAC fume hood were examined. The heat load was supplied to an IAC hood according to the standard method of EN14175-7:2012...
January 17, 2018: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/29341140/lipoprotein-modifications-by-gingipains-of-porphyromonas-gingivalis
#5
J Lönn, S Ljunggren, K Klarström-Engström, I Demirel, T Bengtsson, H Karlsson
BACKGROUND AND OBJECTIVE: Several studies have shown an association between periodontitis and cardiovascular disease (CVD). Atherosclerosis is the major cause of CVD, and a key event in the development of atherosclerosis is accumulation of lipoproteins within the arterial wall. Bacteria are the primary etiologic agents in periodontitis and Porphyromonas gingivalis is the major pathogen in the disease. Several studies support a role of modified low-density lipoprotein (LDL) in atherogenesis; however, the pathogenic stimuli that induce the changes and the mechanisms by which this occur are unknown...
January 17, 2018: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29341034/therapeutic-assessment-of-vulvar-squamous-intraepithelial-lesions-with-co2-laser-vaporization-in-immunosuppressed-patients
#6
Julisa Chamorro Lascasas Ribalta, Mariana Vendramin Mateussi, Neila Maria de Góis Speck
OBJECTIVE:  A vulvar squamous intraepithelial lesion is deemed to be a preceding lesion to vulvar cancer, especially in women aged under 40 years, holders of an acquired or idiopathic immunosuppression. Several treatments have been used to treat these lesions. One of the aesthetically acceptable therapeutic methods is the CO2 laser vaporization. METHODS:  In a transversal study, 46 records of immunosuppressed women bearing a vulvar low grade and/or high grade squamous intraepithelial lesion were selected out of the retrospective analysis, computing age, date of record, date of vulvar lesion treatment with CO2 laser, the time elapsed between the first and the last visit (in months), the number of visits, the presence or absence of condylomatous lesions in other female lower genital tract sites and whether or not recurrences and persistence of intraepithelial lesions have been noticed during the follow-up...
January 2018: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/29340351/effect-of-low-level-laser-on-the-healing-of-bone-defects-filled-with-autogenous-bone-or-bioactive-glass-in-vivo-study
#7
Guilherme Santos Moreira, Patrick Henry Machado Alves, Luis Augusto Esper, Michyele Cristhiane Sbrana, Gisele da Silva Dalben, Karin Hermana Neppelenbroek, Ana Lúcia Pompéia Fraga de Almeida
PURPOSE: This study evaluated the effect of low-level laser therapy (LLLT) on the healing of bone defects filled with autogenous bone or bioactive glass. MATERIALS AND METHODS: A critical size defect with 5-mm diameter was created on the calvaria of 60 adult male rats divided into 6 groups (n = 10): group C (control), group LLLT (LLLT - GaAlAs, wavelength of 780 nm, power of 100 mW, energy density of 210 J/cm2 per point during 60 seconds/point, in five points, only once, after creation of the surgical defect), group AB (autogenous bone), group AB+LLLT (autogenous bone + LLLT), group BG (bioactive glass), group BG+LLLT (bioactive glass + LLLT)...
January 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29339061/dose-dependent-photochemical-photothermal-toxicity-of-indocyanine-green-based-therapy-on-three-different-cancer-cell-lines
#8
Mustafa Kemal Ruhi, Ayşe Ak Can, Murat Gülsoy
The Food and Drug Administration-approved Indocyanine Green can be used as a photosensitizer to kill cancer cells selectively. Although indocyanine green is advantageous as a photosensitizer in terms of strong absorption in the near-infrared region, indocyanine green-based cancer treatment is still not approved as a clinical method. Some reasons for this are aggregation at high concentrations, rapid clearance of the photosensitizer from the body, low singlet oxygen quantum yield, and the uncertainty concerning its action mechanism...
January 12, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29331041/effect-of-low-level-laser-therapy-on-the-healing-of-sites-grafted-with-coagulum-deproteinized-bovine-bone-and-biphasic-ceramic-made-of-hydroxyapatite-and-%C3%AE-tricalcium-phosphate-in-vivo-study-in-rats
#9
Guilherme J P L de Oliveira, Maurício A T Aroni, Marcell C Medeiros, Elcio Marcantonio, Rosemary A C Marcantonio
OBJECTIVE: The aim of this study was to evaluate the effect of low-level laser therapy (LLLT) on the healing of biomaterial graft areas (i.e., coagulum, deproteinized bovine bone, and biphasic ceramics comprising hydroxyapatite and β-tricalcium phosphate). MATERIAL AND METHODS: Ninety rats were divided into two groups according to laser irradiation use (λ 808 nm, 100 mW, φ ∼600 μm, seven sessions with 28 J of irradiation dose in total): a laser group and a control group...
January 13, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29328173/random-fiber-laser-based-on-artificially-controlled-backscattering-fibers
#10
Xiaoliang Wang, Daru Chen, Haitao Li, Lijuan She, Qiong Wu
The random fiber laser (RFL), which is a milestone in laser physics and nonlinear optics, has attracted considerable attention recently. Most previously reported RFLs are based on distributed feedback of Rayleigh scattering amplified through the stimulated Raman-Brillouin scattering effect in single-mode fibers, which require long-distance (tens of kilometers) single-mode fibers and high threshold, up to watt level, due to the extremely small Rayleigh scattering coefficient of the fiber. We proposed and demonstrated a half-open-cavity RFL based on a segment of an artificially controlled backscattering single-mode fiber with a length of 210 m, 310 m, or 390 m...
January 10, 2018: Applied Optics
https://www.readbyqxmd.com/read/29327602/combination-therapy-versus-exercise-and-orthotic-support-in-the-management-of-pain-in-plantar-fasciitis-a-randomized-controlled-trial
#11
Eda Cinar, Shikha Saxena, Fatma Uygur
BACKGROUND: This study aimed at estimating the effectiveness of two commonly used modalities-extracorporeal shock wave therapy (ESWT) and low-level laser therapy (LLLT)-each combined with usual care (exercises and orthotic supports) in comparison to only usual care to relieve pain in patients with plantar fasciitis (PF). METHODS: Participants with PF were randomly allocated into 3 groups: ESWT (n = 25), LLLT (n = 24), and control (n = 17). All participants received a home exercise program with orthotic support...
January 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29327449/clinical-microbiological-and-cytomorphometric-evaluation-of-low-level-laser-therapy-as-an-adjunct-to-periodontal-therapy-in-patients-with-chronic-periodontitis
#12
M S Petrović, I Y Kannosh, J M Milašin, D S Mihailović, R R Obradović, S R Bubanj, L G Kesić
OBJECTIVE: A clinical prospective study was designed to evaluate microbiological, cytomorphometric and clinical efficacy of low-level laser therapy (LLLT) as an adjunct to periodontal therapy in the treatment of chronic periodontitis. METHODS: Sixty subjects were included and randomly assigned into 2 groups: SRP (scaling root planning) group (n = 30) and LLLT + SRP group (n = 30). Clinical parameters were measured before intervention, after the fifth treatment, and after a month...
January 12, 2018: International Journal of Dental Hygiene
https://www.readbyqxmd.com/read/29324692/a-portable-dynamic-laser-speckle-system-for-sensing-long-term-changes-caused-by-treatments-in-painting-conservation
#13
Alberto J Pérez, Rolando J González-Peña, Roberto Braga, Ángel Perles, Eva Pérez-Marín, Fernando J García-Diego
Dynamic laser speckle (DLS) is used as a reliable sensor of activity for all types of materials. Traditional applications are based on high-rate captures (usually greater than 10 frames-per-second, fps). Even for drying processes in conservation treatments, where there is a high level of activity in the first moments after the application and slower activity after some minutes or hours, the process is based on the acquisition of images at a time rate that is the same in moments of high and low activity. In this work, we present an alternative approach to track the drying process of protective layers and other painting conservation processes that take a long time to reduce their levels of activity...
January 11, 2018: Sensors
https://www.readbyqxmd.com/read/29323292/bright-triplet-excitons-in-caesium-lead-halide-perovskites
#14
Michael A Becker, Roman Vaxenburg, Georgian Nedelcu, Peter C Sercel, Andrew Shabaev, Michael J Mehl, John G Michopoulos, Samuel G Lambrakos, Noam Bernstein, John L Lyons, Thilo Stöferle, Rainer F Mahrt, Maksym V Kovalenko, David J Norris, Gabriele Rainò, Alexander L Efros
Nanostructured semiconductors emit light from electronic states known as excitons. For organic materials, Hund's rules state that the lowest-energy exciton is a poorly emitting triplet state. For inorganic semiconductors, similar rules predict an analogue of this triplet state known as the 'dark exciton'. Because dark excitons release photons slowly, hindering emission from inorganic nanostructures, materials that disobey these rules have been sought. However, despite considerable experimental and theoretical efforts, no inorganic semiconductors have been identified in which the lowest exciton is bright...
January 10, 2018: Nature
https://www.readbyqxmd.com/read/29317818/antibacterial-mechanisms-of-a-novel-type-picosecond-laser-generated-silver-titanium-nanoparticles-and-their-toxicity-to-human-cells
#15
Peri Korshed, Lin Li, Zhu Liu, Aleksandr Mironov, Tao Wang
In this study, we explored the antibacterial mechanisms for a novel type of Ag-TiO2 compound nanoparticles (NPs) produced from an Ag-TiO2 alloy using a picosecond laser and evaluated the toxicity of the Ag-TiO2 NPs to a range of human cell types. Transmission electron microscopy was used to determine the morphology, shapes, and size distribution of the laser-generated Ag-TiO2 NPs. UV-visible spectrometer was used to confirm the shift of light absorbance of the NPs toward visible light wavelength. Results showed that the laser-generated Ag-TiO2 NPs had significant antibacterial activities against both Gram-negative and Gram-positive bacterial strains, including Escherichia coli, Pseudomonas aeruginosa, and the methicillin-resistant Staphylococcus aureus...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29315842/high-performance-single-crystalline-perovskite-thin-film-photodetector
#16
Zhenqian Yang, Yuhao Deng, Xiaowei Zhang, Suo Wang, Huazhou Chen, Sui Yang, Jacob Khurgin, Nicholas X Fang, Xiang Zhang, Renmin Ma
The best performing modern optoelectronic devices rely on single-crystalline thin-film (SC-TF) semiconductors grown epitaxially. The emerging halide perovskites, which can be synthesized via low-cost solution-based methods, have achieved substantial success in various optoelectronic devices including solar cells, lasers, light-emitting diodes, and photodetectors. However, to date, the performance of these perovskite devices based on polycrystalline thin-film active layers lags behind the epitaxially grown semiconductor devices...
January 8, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29315011/bioluminescence-analysis-of-antibacterial-photodynamic-therapy-using-methylene-blue-mediated-by-low-intensity-level-laser-against-cariogenic-biofilms
#17
Fernando Luis Florez Esteban, Morgana Regina Mendonça de Oliveira, Osmir Batista de Oliveira Júnior, Rochelle Denise Hiers, Sharukh Soli Khajotia, Hermes Pretel
OBJECTIVE: A non-destructive and real-time bioluminescence (BL) assay was used to determine the utility of antimicrobial photodynamic therapy (aPDT) treatments mediated by methylene blue (MB) and laser irradiation (LI) against intact biofilms that are capable of producing caries (cariogenic). The efficacy of antibacterial photodynamic treatments has been currently determined by using either viable colony counts (VCC) or metabolic assays (Alamar Blue) that were demonstrated to have critical limitations when used on microcolony-forming bacteria such as Streptococcus mutans...
January 9, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29310710/photobiomodulation-using-low-level-laser-therapy-lllt-for-patients-with-chronic-traumatic-brain-injury-a-randomized-controlled-trial-study-protocol
#18
Guilherme da Cruz Ribeiro Poiani, Ana Luiza Zaninotto, Ana Maria Costa Carneiro, Renato Amaro Zangaro, Afonso Shiguemi Inoue Salgado, Rodolfo Borges Parreira, Almir Ferreira de Andrade, Manoel Jacobsen Teixeira, Wellingson Silva Paiva
BACKGROUND: Photobiomodulation using low-level laser therapy (LLLT) has been tested as a new technique to optimize recovery of patients with traumatic brain injury (TBI). The aim of this study is to evaluate inhibitory attentional control after 18 sessions of active LLLT and compare with the placebo group (sham LLLT). Our exploratory analysis will evaluate the efficacy of the active LLLT on verbal and visuospatial episodic memory, executive functions (working memory, verbal and visuospatial fluency, attentional processes), and anxiety and depressive symptoms compared to the sham group...
January 8, 2018: Trials
https://www.readbyqxmd.com/read/29308602/anti-vascular-endothelial-growth-factor-vegf-drugs-for-treatment-of-retinopathy-of-prematurity
#19
REVIEW
Mari Jeeva Sankar, Jhuma Sankar, Parijat Chandra
BACKGROUND: Vascular endothelial growth factor (VEGF) plays a key role in angiogenesis in foetal life. Researchers have recently attempted to use anti-VEGF agents for the treatment of retinopathy of prematurity (ROP), a vasoproliferative disorder. The safety and efficacy of these agents in preterm infants with ROP is currently uncertain. OBJECTIVES: To evaluate the efficacy and safety of anti-VEGF drugs when used either as monotherapy, that is without concomitant cryotherapy or laser therapy, or in combination with planned cryo/laser therapy in preterm infants with type 1 ROP (defined as zone I any stage with plus disease, zone I stage 3 with or without plus disease, or zone II stage 2 or 3 with plus disease)...
January 8, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29308067/effects-of-calcium-ionophore-a23187-on-the-apoptosis-of-hepatic-stellate-cells-stimulated-by-transforming-growth-factor-%C3%AE-1
#20
Yanan Li, Yu Yan, Fang Liu, Ming Wang, Fumin Feng, Yonghong Xiao
Background: Our previous study showed that during in vitro experiments changes in calcium concentration were associated with apoptosis. We presumed that the calcium ion might play a role as intermediate messenger for apoptosis-related genes. No such evidence has been reported in the literature. Here, we investigate the effect of calcium ionophore A23187 on the apoptosis of rat hepatic stellate cells (HSCs) stimulated by transforming growth factor-β1 (TGF-β1) to explore the mechanism of apoptosis through the endoplasmic reticulum stress pathway...
2018: Cellular & Molecular Biology Letters
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