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https://www.readbyqxmd.com/read/28543973/advancing-the-adverse-outcome-pathway-framework-an-international-horizon-scanning-approach
#1
Carlie A LaLone, Gerald T Ankley, Scott E Belanger, Michelle R Embry, Geoff Hodges, Dries Knapen, Sharon Munn, Edward J Perkins, Murray A Rudd, Daniel L Villeneuve, Maurice Whelan, Catherine Willett, Xiaowei Zhang, Markus Hecker
Our ability to conduct whole-organism toxicity tests to understand chemical safety has been outpaced by the synthesis of new chemicals for a wide variety of commercial applications. As a result, scientists and risk assessors are turning to mechanistically based studies to increase efficiencies in chemical risk assessment and making greater use of in vitro and in silico methods to evaluate potential environmental and human health hazards. In this context, the adverse outcome pathway (AOP) framework has gained traction in regulatory science because it offers an efficient and effective means for capturing available knowledge describing the linkage between mechanistic data and the apical toxicity end points required for regulatory assessments...
June 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28542093/feasibility-and-applicability-of-antimicrobial-stewardship-in-immunocompromised-patients
#2
Elizabeth Robilotti, Marisa Holubar, Susan K Seo, Stan Deresinski
PURPOSE OF REVIEW: Antimicrobial stewardship is the primary intervention in the battle against antimicrobial resistance, but clinicians do not always apply many key antimicrobial stewardship principles to patients with significant immune defects due to lack of data and fear of bad outcomes. We review evidence regarding the application of stewardship principles to immunocompromised patients, with a focus on solid organ and hematopoietic stem cell transplant recipients. RECENT FINDINGS: Antimicrobial stewardship programs (ASPs), targeting immunocompromised patient populations such as oncology and transplant, are gaining traction...
May 24, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28542074/nerve-regeneration-and-functional-recovery-when-neurorrhaphy-performed-at-the-early-distraction-osteogenesis-an-experimental-study
#3
Byung Jun Kim, Jeong Mok Cho, Sung Tack Kwon
Distraction osteogenesis is widely used in many clinical situations, but distraction in cases accompanying nerve injury has been avoided due to concern of unfavorable effect on nerve regeneration by traction. This study evaluated the feasibility of early distraction lengthening after neurorrhaphy. Thirty-six rats were evenly distributed into 3 groups (12 rats in each group); neurorrhaphy and distraction (group I), neurorrhaphy and osteotomy without distraction (group II), and only distraction without neurorrhaphy (group III), respectively...
May 24, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28540592/-assistance-nursing-and-participation-in-old-age-future-of-domestic-care-in-cases-of-care-dependency
#4
REVIEW
Josefine Heusinger, Kerstin Hämel, Susanne Kümpers
The future development of home care services for older people in need of care is associated with great challenges. This article begins with a brief summary of the most urgent care problems from the perspective of people requiring care and that of caring relatives. The problems exhibit social and spatial inequalities and are characterized by coordination problems within a fragmented organizational system. Calls for a viable "care mix" are nothing new but have recently gained considerable traction under the label of "caring communities"...
May 24, 2017: Zeitschrift Für Gerontologie und Geriatrie
https://www.readbyqxmd.com/read/28540090/orthodontic-intervention-to-impacted-and-transposed-lower-canines
#5
Nihat Kılıç, Hüsamettin Oktay
Impacted and transposed teeth cause serious difficulties in tooth eruption and movement as well as esthetic and functional outcomes. Proper treatment planning including good biomechanical control is essential in order to avoid side effects during traction and aligning of the impacted and/or transposed teeth. The purpose of the present study was to present a successfully treated female patient having transposed and impacted lower canines by means of a modified lingual arch and fixed orthodontic appliance. A female patient aged 13 years and 9 months presented to the orthodontic department with a chief compliant of bilateral spacing and missing teeth in mandibular dentition...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28537995/developmental-dysplasia-of-the-hip-a-history-of-innovation
#6
Sandip P Tarpada, Steven J Girdler, Mathew T Morris
Developmental dysplasia of the hip (DDH) is a relatively common malady that has profound consequences in the infant if left untreated. Effective and early treatment of DDH has been praised as one of the most successful ventures of modern pediatric orthopedics. Yet, before the modern management of DDH came into existence, there were extensive technological developments in the field of harnesses, casts, and traction methods. This paper aims to identify the centuries-old history of advancement in DDH treatment and the many important people involved...
May 19, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28537381/collagen-gels-with-different-fibrillar-microarchitectures-elicit-different-cellular-responses
#7
Jing Xie, Min Bao, Stephanie M C Bruekers, Wilhelm T S Huck
The extracellular matrix consists of a complex mixture of fibrillar proteins, where the architecture and mechanical properties of the protein fibrils vary considerably in various tissues. Here, we systematically polymerized collagen gels at different temperatures, providing substrates with tunable mechanics and defined local micro-architecture. We studied the dependence of spreading dynamics, proliferation, migration and differentiation of human mesenchymal stem cells (hMSCs) on the fibrillar properties as compared to the bulk properties of the matrix...
May 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28537232/-cd47-receptor-as-a-primary-target-for-cancer-therapy
#8
N M Ratnikova, Y N Lezhnin, E I Frolova, J E Kravchenko, S P Chumakov
Recently, a number of new highly efficient antibody-based anticancer therapeutics have emerged. These receptor-binding antibodies have beneficial toxicity profiles associated with relatively mild side effects. Therefore, the search for novel surface proteins that are present on cancer cells and play important metabolic or defensive roles has intensified. Additionally, the therapeutic stimulation of patient's immune system in order to aim its components, specifically, phagocytes and cytotoxic T-lymphocytes, at tumor cells is gaining traction...
March 2017: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/28535678/rapid-analysis-of-bisphenol-a-and-its-analogs-in-food-packaging-products-by-paper-spray-ionization-mass-spectrometry
#9
Shuo Chen, Quanying Chang, Kai Yin, Qunying He, Yongxiu Deng, Bo Chen, Chengbin Liu, Ying Wang, Liping Wang
In this study, a paper spray ionization mass spectrometric (PS-MS) method was de-veloped for the rapid in situ screening and simultaneous quantitative analysis of bisphenol A and its analogs, i.e., bisphenol S, bisphenol F, and bisphenol AF, in food packaging products. At the optimal PS-MS conditions, the calibration curves of bisphenols in the range of 1-100 µg/mL were linear. The correlation coefficients were higher than 0.998, the LODs of the target compounds were 0.1-0.3 µg/mL. After a simple treatment by dichloromethane on the surface, the samples were analyzed by PS-MS in situ for rapid screening without a traditional sample pretreatment procedure, such as powdering, ex-traction and enrichment steps...
May 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28532876/treatment-of-the-scar-after-arthroscopic-surgery-on-a-knee
#10
Jacobo Alvira-Lechuz, Mercedes Roca Espiau, Elena Alvira-Lechuz
The aim of this paper is to present a treatment for scars based on percutaneous traction. This is a structural technique in which movements are performed against the barriers detected in different planes. The stages of this technique are described in detail along with the results after applying it to a postarthroscopic scar on a knee. The active and passive mobility of femoro-tibial and femoro-patellar articulations improved substantially after the treatment, as verified by signs such as pain relief, greater flexibility, disappearance of inflammation and a major recovery of tissue elasticity...
April 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28532442/an-integrated-enhancement-and-reconstruction-strategy-for-the-quantitative-extraction-of-actin-stress-fibers-from-fluorescence-micrographs
#11
Zhen Zhang, Shumin Xia, Pakorn Kanchanawong
BACKGROUND: The stress fibers are prominent organization of actin filaments that perform important functions in cellular processes such as migration, polarization, and traction force generation, and whose collective organization reflects the physiological and mechanical activities of the cells. Easily visualized by fluorescence microscopy, the stress fibers are widely used as qualitative descriptors of cell phenotypes. However, due to the complexity of the stress fibers and the presence of other actin-containing cellular features, images of stress fibers are relatively challenging to quantitatively analyze using previously developed approaches, requiring significant user intervention...
May 22, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28530823/nanomechanically-visualizing-drug-cell-interaction-at-the-early-stage-of-chemotherapy
#12
Yun-Long Wu, Wilfried Engl, Benhui Hu, Pingqiang Cai, Wan Ru Leow, Nguan Soon Tan, Chwee Teck Lim, Xiaodong Chen
A detailed understanding of chemotherapy is determined by the response of cell to the formation of the drug-target complex and its corresponding sudden or eventual cell death. However, visualization of this early but important process, encompassing the fast dynamics as well as complex network of molecular pathways, remains challenging. Herein, we report that the nanomechanical traction force is sensitive enough to reflect the early cellular response upon the addition of chemotherapeutical molecules in a real-time and non-invasive manner, due to interactions between chemotherapeutic drug and its cytoskeleton targets...
May 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28530245/shifting-the-optimal-stiffness-for-cell-migration
#13
Benjamin L Bangasser, Ghaidan A Shamsan, Clarence E Chan, Kwaku N Opoku, Erkan Tüzel, Benjamin W Schlichtmann, Jesse A Kasim, Benjamin J Fuller, Brannon R McCullough, Steven S Rosenfeld, David J Odde
Cell migration, which is central to many biological processes including wound healing and cancer progression, is sensitive to environmental stiffness, and many cell types exhibit a stiffness optimum, at which migration is maximal. Here we present a cell migration simulator that predicts a stiffness optimum that can be shifted by altering the number of active molecular motors and clutches. This prediction is verified experimentally by comparing cell traction and F-actin retrograde flow for two cell types with differing amounts of active motors and clutches: embryonic chick forebrain neurons (ECFNs; optimum ∼1 kPa) and U251 glioma cells (optimum ∼100 kPa)...
May 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28529661/slipped-capital-femoral-epiphysis-management-and-the-arthroscope
#14
F Accadbled, O May, C Thévenin-Lemoine, J Sales de Gauzy
BACKGROUND: In situ pinning of slipped capital femoral epiphysis (SCFE) results in various degrees of deformity of the femoral head-neck junction. Repetitive trauma from cam-type femoroacetabular impingement (FAI) can lead to labral tears and injury to the articular cartilage causing loss of function. Arthroscopic osteoplasty is an alternative to open procedure and to Southwick/Imhäuser-type osteotomies in symptomatic selected cases. SURGICAL TECHNIQUE: The amount of bone to be resected has to be carefully planned pre-operatively...
April 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28527835/biomechanical-study-on-surgical-fixation-methods-for-minimally-invasive-treatment-of-hallux-valgus
#15
Rui Mao, Junchao Guo, Chenyu Luo, Yubo Fan, Jianmin Wen, Lizhen Wang
Hallux valgus (HV) was one of the most frequent female foot deformities. The aim of this study was to evaluate mechanical responses and stabilities of the Kirschner, bandage and fiberglass fixations after the distal metatarsal osteotomy in HV treatment. Surface traction of different forefoot regions in bandage fixation and the biomechanical behavior of fiberglass bandage material were measured by a pressure sensor device and a mechanical testing, respectively. A three-dimensional foot finite element (FE) model was developed to simulate the three fixation methods (Kirschner, bandage and fiberglass fixations) in weight bearing...
May 17, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28525570/droplet-barcode-sequencing-for-targeted-linked-read-haplotyping-of-single-dna-molecules
#16
David Redin, Erik Borgström, Mengxiao He, Hooman Aghelpasand, Max Käller, Afshin Ahmadian
Data produced with short-read sequencing technologies result in ambiguous haplotyping and a limited capacity to investigate the full repertoire of biologically relevant forms of genetic variation. The notion of haplotype-resolved sequencing data has recently gained traction to reduce this unwanted ambiguity and enable exploration of other forms of genetic variation; beyond studies of just nucleotide polymorphisms, such as compound heterozygosity and structural variations. Here we describe Droplet Barcode Sequencing, a novel approach for creating linked-read sequencing libraries by uniquely barcoding the information within single DNA molecules in emulsion droplets, without the aid of specialty reagents or microfluidic devices...
May 19, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28523381/national-clinical-guidelines-for-non-surgical-treatment-of-patients-with-recent-onset-neck-pain-or-cervical-radiculopathy
#17
REVIEW
Per Kjaer, Alice Kongsted, Jan Hartvigsen, Alexander Isenberg-Jørgensen, Berit Schiøttz-Christensen, Bolette Søborg, Charlotte Krog, Christian Martin Møller, Christine Marie Bækø Halling, Henrik Hein Lauridsen, Inge Ris Hansen, Jesper Nørregaard, Karsten Juhl Jørgensen, Lars Valentin Hansen, Marie Jakobsen, Martin Bach Jensen, Martin Melbye, Peter Duel, Steffan W Christensen, Tina Myung Povlsen
PURPOSE: To summarise recommendations about 21 selected non-surgical interventions for recent onset (<12 weeks) non-specific neck pain (NP) and cervical radiculopathy (CR) based on two guidelines from the Danish Health Authority. METHODS: Two multidisciplinary working groups formulated recommendations based on the GRADE approach. RESULTS: Twelve recommendations were based on evidence and nine on consensus. Management should include information about prognosis, warning signs, and advise to remain active...
May 18, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28522906/magnetic-anchor-guidance-for-endoscopic-submucosal-dissection-and-other-endoscopic-procedures
#18
REVIEW
Mohamed Mortagy, Neal Mehta, Mansour A Parsi, Seiichiro Abe, Tyler Stevens, John J Vargo, Yutaka Saito, Amit Bhatt
Endoscopic submucosal dissection (ESD) is a well-established, minimally invasive treatment for superficial neoplasms of the gastrointestinal tract. The universal adoption of ESD has been limited by its slow learning curve, long procedure times, and high risk of complications. One technical challenge is the lack of a second hand that can provide traction, as in conventional surgery. Reliable tissue retraction that exposes the submucosal plane of dissection would allow for safer and more efficient dissection...
April 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28522789/efficacy-of-camera-sleeve-in-conveyance-of-conduits
#19
R Saranga Bharathi
BACKGROUND: Esophageal substitutes need conveyance from the abdomen into the neck for restoration of alimentary continuity. Reports suggest that the use of plastic camera sleeve may prove advantageous in restoring conveyance. This study aims to evaluate the practicability of this approach, specifically, in laparoscopy-assisted surgeries. METHODS: The efficacy of camera sleeve in conduit transposition was prospectively evaluated over 2 years. The following parameters were assessed: success/failure; time taken; blood loss; adequacy of length of the conduit delivered into the neck; conduit orientation; ease of procedure through different routes; conduit damage; complications; and drawbacks...
February 28, 2017: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/28522246/patient-obesity-influences-pelvic-lift-during-cup-insertion-in-total-hip-arthroplasty-through-a-lateral-transgluteal-approach-in-supine-position
#20
Steffen Brodt, Dimitri Nowack, Benjamin Jacob, Linda Krakow, Christoph Windisch, Georg Matziolis
BACKGROUND: Movement of the pelvis during implantation of total hip arthroplasty (THA) has a major influence on the positioning of the acetabular cup. Strong traction caused by retractors leads to iatrogenic pelvic lift and can thus be partly responsible for cup malpositioning. The objective of this study was to investigate such factors that influence pelvic lift. METHODS: The dynamic movement of the pelvis was measured during implantation of THA in 67 patients...
April 21, 2017: Journal of Arthroplasty
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