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https://www.readbyqxmd.com/read/28221776/the-horizon-of-materiobiology-a-perspective-on-material-guided-cell-behaviors-and-tissue-engineering
#1
Yulin Li, Yin Xiao, Changsheng Liu
Although the biological functions of cell and tissue can be regulated by biochemical factors (e.g., growth factors, hormones), the biophysical effects of materials on the regulation of biological activity are receiving more attention. In this Review, we systematically summarize the recent progress on how biomaterials with controllable properties (e.g., compositional/degradable dynamics, mechanical properties, 2D topography, and 3D geometry) can regulate cell behaviors (e.g., cell adhesion, spreading, proliferation, cell alignment, and the differentiation or self-maintenance of stem cells) and tissue/organ functions...
February 21, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28192838/topography-guided-prk-and-crosslinking-in-eyes-with-keratoconus-and-post-lasik-ectasia
#2
T M Müller, A P Lange
Topography-guided photorefractive keratectomy (TG-PRK) combined with corneal collagen crosslinking (CXL) has been shown to potentially improve vision and stabilize progression in patients with keratoconus (KC). We attempted to reproduce the previously published results using a different laser platform (AMARIS 500E) in patients with KC and post-LASIK ectasia (PLE). All of the 9 included eyes showed improved topography (Kmax, Kmean, RMS HOA, vertical coma, cylinder; p < 0.05) and improved visual acuity (BCVA, UCVA; p < 0...
February 13, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28192592/an-algorithm-to-predict-the-biomechanical-stiffening-effect-in-corneal-cross-linking
#3
Sabine Kling, Farhad Hafezi
PURPOSE: To develop an algorithm to predict the stiffening effect of CXL and to verify the accuracy with results obtained from experimental measurements. METHODS: The algorithm considers different variables: the reaction kinetics of riboflavin diffusion and riboflavin photodegradation to determine the effective riboflavin concentration in different stromal layers; the oxygen diffusion and ultraviolet (UV) absorption to determine the amount of reactive oxygen species as a function of time and stromal depth...
February 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28160364/peripheral-nerve-stimulation-of-brachial-plexus-nerve-roots-and-supra-scapular-nerve-for-chronic-refractory-neuropathic-pain-of-the-upper-limb
#4
Bénédicte Bouche, Marie Manfiotto, Philippe Rigoard, Jean Lemarie, Véronique Dix-Neuf, Michel Lanteri-Minet, Denys Fontaine
OBJECTIVES: We report the outcome of a consecutive series of 26 patients suffering from chronic medically-refractory neuropathic pain of the upper limb (including 16 patients with complex regional pain syndrome), topographically limited, treated by brachial plexus (BP) nerve roots or supra-scapular nerve (SSN) peripheral nerve stimulation (PNS). MATERIALS AND METHODS: The technique consisted in ultrasound-guided percutaneous implantation of a cylindrical lead (Pisces-Quad, Medtronic) close to the SSN or the cervical nerve roots within the BP, depending on the pain topography...
February 3, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28158256/a-global-review-of-past-land-use-climate-and-active-vs-passive-restoration-effects-on-forest-recovery
#5
Paula Meli, Karen D Holl, José María Rey Benayas, Holly P Jones, Peter C Jones, Daniel Montoya, David Moreno Mateos
Global forest restoration targets have been set, yet policy makers and land managers lack guiding principles on how to invest limited resources to achieve them. We conducted a meta-analysis of 166 studies in naturally regenerating and actively restored forests worldwide to answer: (1) To what extent do floral and faunal abundance and diversity and biogeochemical functions recover? (2) Does recovery vary as a function of past land use, time since restoration, forest region, or precipitation? (3) Does active restoration result in more complete or faster recovery than passive restoration? Overall, forests showed a high level of recovery, but the time to recovery depended on the metric type measured, past land use, and region...
2017: PloS One
https://www.readbyqxmd.com/read/28139904/bactericidal-effects-of-natural-nanotopography-of-dragonfly-wing-on-escherichia-coli
#6
Chaturanga D Bandara, Sanjleena Singh, Isaac O Afara, Tuquabo Tesfamichael, Annalena Wolff, Kostya Ken Ostrikov, Adekunle Oloyede
Nano-textured surfaces (NTS) are critical to organisms as self-adaptation and survival tools. These NTS have been actively mimicked in the process of developing bactericidal surfaces for diverse biomedical and hygiene applications. To design and fabricate bactericidal topographies effectively for various applications, understanding the bactericidal mechanism of NTS in nature is essential. The current mechanistic explanations on natural bactericidal activity of nanopillars have not utilized recent advances in microscopy to study the natural interaction...
January 31, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28132673/recent-advances-in-the-study-and-design-of-parahydrophobic-surfaces-from-natural-examples-to-synthetic-approaches
#7
REVIEW
Caroline R Szczepanski, Frédéric Guittard, Thierry Darmanin
Parahydrophobic surfaces are an interesting class of materials that combines both high contact angles and very strong adhesion with wetting fluids, most commonly water. This unique set of properties makes parahydrophobic surfaces attractive for a variety of applications, including water harvesting and collection, guided fluid transport, and membrane development, amongst many others. Taking inspiration from natural surfaces that display this same behavior such as rose petals and gecko feet, synthetic approaches aim to incorporate the nano- and micro-scale topography as well as the low surface energy chemistry found on these interfaces...
January 19, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28126815/airborne-laser-guided-imaging-spectroscopy-to-map-forest-trait-diversity-and-guide-conservation
#8
G P Asner, R E Martin, D E Knapp, R Tupayachi, C B Anderson, F Sinca, N R Vaughn, W Llactayo
Functional biogeography may bridge a gap between field-based biodiversity information and satellite-based Earth system studies, thereby supporting conservation plans to protect more species and their contributions to ecosystem functioning. We used airborne laser-guided imaging spectroscopy with environmental modeling to derive large-scale, multivariate forest canopy functional trait maps of the Peruvian Andes-to-Amazon biodiversity hotspot. Seven mapped canopy traits revealed functional variation in a geospatial pattern explained by geology, topography, hydrology, and climate...
January 27, 2017: Science
https://www.readbyqxmd.com/read/28120301/clinical-efficacy-and-safety-of-surface-imaging-guided-radiosurgery-sig-rs-in-the-treatment-of-benign-skull-base-tumors
#9
Steven K M Lau, Kunal Patel, Teddy Kim, Erik Knipprath, Gwe-Ya Kim, Laura I Cerviño, Joshua D Lawson, Kevin T Murphy, Parag Sanghvi, Bob S Carter, Clark C Chen
Frameless, surface imaging guided radiosurgery (SIG-RS) is a novel platform for stereotactic radiosurgery (SRS) wherein patient positioning is monitored in real-time through infra-red camera tracking of facial topography. Here we describe our initial clinical experience with SIG-RS for the treatment of benign neoplasms of the skull base. We identified 48 patients with benign skull base tumors consecutively treated with SIG-RS at a single institution between 2009 and 2011. Patients were diagnosed with meningioma (n = 22), vestibular schwannoma (n = 20), or nonfunctional pituitary adenoma (n = 6)...
January 24, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28115827/comparison-and-analysis-of-fda-reported-visual-outcomes-of-the-three-latest-platforms-for-lasik-wavefront-guided-visx-idesign-topography-guided-wavelight-allegro-contoura-and-topography-guided-nidek-ec-5000-catz
#10
Majid Moshirfar, Tirth J Shah, David Franklin Skanchy, Steven H Linn, Paul Kang, Daniel S Durrie
PURPOSE: To compare and analyze the differences in visual outcomes between Visx iDesign Advanced WaveScan Studio™ System, Alcon Wavelight Allegro Topolyzer and Nidek EC-5000 using Final Fit™ Custom Ablation Treatment Software from the submitted summary of safety and effectiveness of the US Food and Drug Administration (FDA) data. METHODS: In this retrospective comparative study, 334 eyes from Visx iDesign, 212 eyes from Alcon Contour, and 135 eyes from Nidek CATz platforms were analyzed for primary and secondary visual outcomes...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28078333/topography-guided-buckling-of-swollen-polymer-bilayer-films-into-three-dimensional-structures
#11
Joonwoo Jeong, Yigil Cho, Su Yeon Lee, Xingting Gong, Randall D Kamien, Shu Yang, A G Yodh
Thin films that exhibit spatially heterogeneous swelling often buckle into the third dimension to minimize stress. These effects, in turn, offer a promising strategy to fabricate complex three-dimensional structures from two-dimensional sheets. Here we employ surface topography as a new means to guide buckling of swollen polymer bilayer films and thereby control the morphology of resulting three-dimensional objects. Topographic patterns are created on poly(dimethylsiloxane) (PDMS) films selectively coated with a thin layer of non-swelling parylene on different sides of the patterned films...
February 7, 2017: Soft Matter
https://www.readbyqxmd.com/read/28072805/anatomical-variants-of-the-pudendal-nerve-observed-during-a-transgluteal-surgical-approach-in-a-population-of-patients-with-pudendal-neuralgia
#12
Stephane Ploteau, Marie-Aimee Perrouin-Verbe, Jean-Jacques Labat, Thibault Riant, Amelie Levesque, Roger Robert
BACKGROUND: Several studies have described the course and anatomical relations of the pudendal nerve. Several surgical nerve decompression techniques have been described, but only the transgluteal approach has been validated by a prospective randomized clinical trial. The purpose of this study was to describe the course of the nerve and its variants in a population of patients with pudendal neuralgia in order to guide the surgeon in the choice of surgical approach for pudendal nerve decompression...
January 2017: Pain Physician
https://www.readbyqxmd.com/read/28068440/a-prospective-study-to-compare-visual-outcomes-between-wavefront-optimized-and-topography-guided-ablation-profiles-in-contralateral-eyes-with-myopia
#13
Rohit Shetty, Rushad Shroff, Kalyani Deshpande, Roshan Gowda, Sumeet Lahane, Chaitra Jayadev
PURPOSE: To analyze refractive outcomes of wavefront-optimized (WFO) ablation and topography-guided custom ablation (TCAT) profiles using the Allegretto Wave excimer laser platform (Alcon Laboratories, Inc., Fort Worth, TX) in the treatment of myopia. METHODS: Sixty eyes of 30 patients who underwent LASIK were included in this prospective interventional study. WFO ablation was performed in one eye (WFO group) and TCAT in the fellow eye (TCAT group). The WaveLight FS200 femtosecond laser (Alcon Laboratories, Inc...
January 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28060075/removal-and-repositioning-of-intracorneal-ring-segments-improving-corneal-topography-and-clinical-outcomes-in-keratoconus-and-ectasia
#14
Kahei Chan, Peter S Hersh
PURPOSE: To evaluate the efficacy of removal and relocation of intracorneal ring segments for improving outcomes in treatment of keratoconus and corneal ectasia. METHODS: This is a retrospective case series conducted at a cornea and refractive surgery subspecialty practice setting. Patients with previous insertion of 2 intracorneal ring segments underwent surgical removal and repositioning of segments because of unsatisfactory visual and topographic outcomes. The principal outcomes included uncorrected and corrected visual acuities, manifest refraction, topography-derived maximum keratometry (Kmax), inferior-superior topography power difference (I - S), and higher-order aberration profile derived from wavefront analysis...
February 2017: Cornea
https://www.readbyqxmd.com/read/28024363/hierarchical-metal-oxide-topographies-replicated-from-highly-textured-graphene-oxide-by-intercalation-templating
#15
Po-Yen Chen, Muchun Liu, Thomas M Valentin, Zhongying Wang, Ruben Spitz Steinberg, Jaskiranjeet Sodhi, Ian Y Wong, Robert H Hurt
Confined assembly in the intersheet gallery spaces of two-dimensional (2D) materials is an emerging templating route for creation of ultrathin material architectures. Here, we demonstrate a general synthetic route for transcribing complex wrinkled and crumpled topographies in graphene oxide (GO) films into textured metal oxides. Intercalation of hydrated metal ions into textured GO multilayer films followed by dehydration, thermal decomposition, and air oxidation produces Zn, Al, Mn, and Cu oxide films with high-fidelity replication of the original GO textures, including "multi-generational", multiscale textures that have been recently achieved through extreme graphene compression...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/28018671/accelerated-corneal-collagen-cross-linking-using-topography-guided-uv-a-energy-emission-preliminary-clinical-and-morphological-outcomes
#16
Cosimo Mazzotta, Antonio Moramarco, Claudio Traversi, Stefano Baiocchi, Alfonso Iovieno, Luigi Fontana
Purpose. To assess the clinical and morphological outcomes of topography-guided accelerated corneal cross-linking. Design. Retrospective case series. Methods. 21 eyes of 20 patients with progressive keratoconus were enrolled. All patients underwent accelerated cross-linking using an ultraviolet-A (UVA) exposure with an energy release varying from 7.2 J/cm(2) up to 15 J/cm(2), according to the topographic corneal curvature. Uncorrected (UDVA) and corrected (CDVA) distance visual acuity, topography, in vivo confocal microscopy (IVCM), and anterior segment optic coherence tomography (AS-OCT) were evaluated preoperatively and at the 1, 3, 6, and 12 months postoperatively...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28005329/quantitative-three-dimensional-characterization-of-block-copolymer-directed-self-assembly-on-combined-chemical-and-topographical-prepatterned-templates
#17
Tamar Segal-Peretz, Jiaxing Ren, Shisheng Xiong, Gurdaman Khaira, Alec Bowen, Leonidas E Ocola, Ralu Divan, Manolis Doxastakis, Nicola J Ferrier, Juan de Pablo, Paul F Nealey
Characterization of the three-dimensional (3D) structure in directed self-assembly (DSA) of block copolymers is crucial for understanding the complex relationships between the guiding template and the resulting polymer structure so DSA could be successfully implemented for advanced lithography applications. Here, we combined scanning transmission electron microscopy (STEM) tomography and coarse-grain simulations to probe the 3D structure of P2VP-b-PS-b-P2VP assembled on prepatterned templates using solvent vapor annealing...
January 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/27980046/pet-quantification-of-the-norepinephrine-transporter-in-human-brain-with-s-s-18f-fmener-d2
#18
Sho Moriguchi, Yasuyuki Kimura, Masanori Ichise, Ryosuke Arakawa, Harumasa Takano, Chie Seki, Yoko Ikoma, Keisuke Takahata, Tomohisa Nagashima, Makiko Yamada, Masaru Mimura, Tetsuya Suhara
: Norepinephrine transporter (NET) in the brain plays important roles in human cognition and the pathophysiology of psychiatric disorders. Two radioligands, (S,S)-(11)C-MRB and (S,S)-(18)F-FMeNER-D2, have been used for imaging NETs in the thalamus and midbrain (including locus coeruleus) using positron emission topography (PET) in humans. However, NET density in the equally important cerebral cortex has not been well quantified because of unfavorable kinetics with (S,S)-(11)C-MRB and defluorination with (S,S)-(18)F-FMeNER-D2, which can complicate NET quantification in the cerebral cortex adjacent to the skull containing defluorinated (18)F radioactivity...
December 15, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27918353/removal-and-repositioning-of-intracorneal-ring-segments-improving-corneal-topography-and-clinical-outcomes-in-keratoconus-and-ectasia
#19
Kahei Chan, Peter S Hersh
PURPOSE: To evaluate the efficacy of removal and relocation of intracorneal ring segments for improving outcomes in treatment of keratoconus and corneal ectasia. METHODS: This is a retrospective case series conducted at a cornea and refractive surgery subspecialty practice setting. Patients with previous insertion of 2 intracorneal ring segments underwent surgical removal and repositioning of segments because of unsatisfactory visual and topographic outcomes. The principal outcomes included uncorrected and corrected visual acuities, manifest refraction, topography-derived maximum keratometry (Kmax), inferior-superior topography power difference (I - S), and higher-order aberration profile derived from wavefront analysis...
December 1, 2016: Cornea
https://www.readbyqxmd.com/read/27899371/refractive-improvements-and-safety-with-topography-guided-corneal-crosslinking-for-keratoconus-1-year-results
#20
Maria Nordström, Maria Schiller, Anneli Fredriksson, Anders Behndig
PURPOSE: To assess the refractive improvements and the corneal endothelial safety of an individualised topography-guided regimen for corneal crosslinking in progressive keratoconus. METHODS: An open-label prospective randomised clinical trial was performed at the Department of Clinical Sciences, Ophthalmology, Umeå University Hospital, Umeå, Sweden. Thirty-seven patients (50 eyes) with progressive keratoconus planned for corneal crosslinking were included. The patients were randomised to topography-guided crosslinking (photorefractive intrastromal crosslinking (PiXL); n=25) or uniform 9 mm crosslinking (corneal collagen crosslinking (CXL); n=25)...
November 29, 2016: British Journal of Ophthalmology
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