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https://www.readbyqxmd.com/read/28636923/mechanosensitive-adhesion-explains-stepping-motility-in-amoeboid-cells
#1
Calina A Copos, Sam Walcott, Juan C Del Álamo, Effie Bastounis, Alex Mogilner, Robert D Guy
Cells employing amoeboid motility exhibit repetitive cycles of rapid expansion and contraction and apply coordinated traction forces to their environment. Although aspects of this process are well studied, it is unclear how the cell controls the coordination of cell length changes with adhesion to the surface. Here, we develop a simple model to mechanistically explain the emergence of periodic changes in length and spatiotemporal dynamics of traction forces measured in chemotaxing unicellular amoeba, Dictyostelium discoideum...
June 20, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28635137/effect-of-body-position-eyelid-manipulation-and-manual-jugular-compression-on-intraocular-pressure-in-clinically-normal-cats
#2
Seyed Mehdi Rajaei, Faezeh Asadi, Mohammad Reza Rajabian, Hesam Ostadhassan, Manuela Crasta
OBJECTIVE: To determine the effect of body position, eyelid manipulation, and manual jugular compression on intraocular pressure (IOP) in clinically normal cats. ANIMAL STUDIED: TWENTY-ONE ADULT CLIENT-OWNED DOMESTIC SHORTHAIR CATS: PROCEDURES: The IOP was measured by means of rebound tonometer. A baseline IOP was measured in all cats in ventral recumbency with normal head position (horizontal to the ground) with no pressure on the neck or eyelids. To measure the IOP in dorsal recumbency, each cat was held in the dorsal recumbency position for 5 min...
June 20, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28633918/traction-force-and-its-regulation-during-cytokinesis-in-dictyostelium-cells
#3
Md Golam Sarowar Jahan, Shigehiko Yumura
Cytokinesis is the final stage of cell division. Dictyostelium cells have multiple modes of cytokinesis, including cytokinesis A, B and C. Cytokinesis A is a conventional mode, which depends on myosin II in the contractile ring. Myosin II null cells divide depending on substratum-attachment (cytokinesis B) or in a multi-polar fashion independent of the cell cycle (cytokinesis C). We investigated the traction stress exerted by dividing cells in the three different modes using traction force microscopy. In all cases, the traction forces were directed inward from both poles...
June 12, 2017: European Journal of Cell Biology
https://www.readbyqxmd.com/read/28633724/change-in-end-expiratory-lung-volume-during-sleep-in-patients-at-risk-for-obstructive-sleep-apnea
#4
Patrick Koo, Eric J Gartman, Jigme M Sethi, Eyad Kawar, F Dennis McCool
STUDY OBJECTIVES: As lung volume decreases radial traction on the upper airway is reduced, making it more collapsible. The purpose of this study was to measure change in end-expiratory lung volume (EELV) following sleep onset and to evaluate the relationship between change in EELV and sleep-disordered breathing. METHODS: Twenty subjects underwent overnight polysomnography, of whom 14 (70%) had obstructive sleep apnea (OSA). Change in EELV was measured throughout the night using magnetometry...
June 16, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28630859/the-application-of-internal-suspension-technique-in-retroperitoneal-laparoscopic-partial-nephrectomy-for-renal-ventral-tumors
#5
Wenlong Zhong, Yicong Du, Lei Zhang, Xuesong Li, Cuijian Zhang, Dong Fang, Gengyan Xiong, Zhisong He, Liqun Zhou
OBJECTIVE: To evaluate the feasibility of an internal suspension technique in retroperitoneal laparoscopic partial nephrectomy for the management of renal ventral tumors. METHODS: Between January 2013 and July 2016, a total of 145 patients underwent retroperitoneal laparoscopic partial nephrectomy with or without internal suspension technique. For patients who underwent internal suspension technique, the surgeons preserved the external fat of the renal tumor as a suspension traction measure when separating the kidney...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28630852/adult-traumatic-inferior-hip-dislocation-rare-case-ended-with-open-reduction
#6
Salam Ismael, J Vora, P Thomas
INTRODUCTION: An inferior hip dislocation also called luxatio erecta femoris is a rare type of hip dislocation that is not widely reported in literature. Only 12 cases are reported in British literature. CASE REPORT: This article reports a 17-year-old male involved in a road traffic accident, sustaining inferior hip dislocation. Following resuscitation, computed tomography confirmed the clinical diagnoses. Several attempts to perform a closed reduction of the hip under sedation and general anesthesia failed to reduce the dislocation...
January 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28630830/bilateral-humerus-and-right-femur-fracture-in-a-newborn-after-cesarean-section-for-breech-presentation-in-a-twin-pregnancy-a-very-rare-case-report
#7
P Rahul, Amit Rakesh Grover, S M Ajoy
INTRODUCTION: The most common fractures during vaginal delivery occur in the clavicle, humerus, and femur. Cesarean section reduces the chances of a child having a birth injury. However, in some difficult extractions, long bone fractures may occur. Cesarean section further reduces the incidence of birth injuries, especially in a breech delivery. Maneuvers employed during cesarean section, energetic traction, improper uterine incisions, and contracted uterus may cause these injuries. In the medical literature, there are few articles highlighting the occurrence of long bone fractures during cesarean section...
January 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28630721/traction-related-problems-after-hip-arthroscopy
#8
Lone Frandsen, Bent Lund, Torsten Grønbech Nielsen, Martin Lind
Traction-related problems are poorly described in the existing literature. The purpose of this prospective study was to describe traction-related problems and how patients perceive these problems. The study was a descriptive cohort study and data were collected from questionnaires and patient files. The questionnaire included questions on patients' perceptions of traction-related problems in the groin area, at the knee and ankle and how patients had coped with these problems. A total of 100 consecutive patients undergoing hip arthroscopy filled out the questionnaire...
January 2017: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/28628935/proximal-left-main-bronchus-resection-reconstruction-through-left-thoracotomy-with-tracheal-traction
#9
Naoko Imanishi, Masaru Takenaka, Ayako Hirai, Fumihiro Tanaka
No abstract text is available yet for this article.
June 19, 2017: Thoracic and Cardiovascular Surgeon
https://www.readbyqxmd.com/read/28627753/traction-force-microscopy-in-3-dimensional-extracellular-matrix-networks
#10
M Cóndor, J Steinwachs, C Mark, J M García-Aznar, B Fabry
Cell migration through a three-dimensional (3-D) matrix depends strongly on the ability of cells to generate traction forces. To overcome the steric hindrance of the matrix, cells need to generate sufficiently high traction forces but also need to distribute these forces spatially in a migration-promoting way. This unit describes a protocol to measure spatial maps of cell traction forces in 3-D biopolymer networks such as collagen, fibrin, or Matrigel. Traction forces are computed from the relationship between measured force-induced matrix deformations surrounding the cell and the known mechanical properties of the matrix...
June 19, 2017: Current Protocols in Cell Biology
https://www.readbyqxmd.com/read/28624722/age-related-differences-in-the-response-of-the-l5-s1-intervertebral-disc-to-spinal-traction
#11
Ulrike H Mitchell, Paul F Beattie, Jennifer Bowden, Robert Larson, Hanuan Wang
BACKGROUND: Lumbar traction is a common treatment for low back pain; however its mechanisms of action are poorly understood. It has been hypothesized that a key effect of lumbar traction is its capacity to influence fluid movement within the intervertebral disc (IVD). OBJECTIVES: To determine differences in the apparent diffusion coefficient (ADC) obtained with lumbar diffusion-weighted imaging (DWI) of the L5-S1 IVD before, and during, the application of lumbar traction...
June 9, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28624312/non-lens-based-surgical-techniques-for-presbyopia-correction
#12
R Bilbao-Calabuig, F Llovet-Osuna
INTRODUCTION: Presbyopia is the most prevalent refractive error. With a progressive aging population, its surgical correction is an important challenge for the ophthalmology community, as well as the millions of patients who suffer from it, and who are increasingly demanding alternatives to its correction with glasses or contact lenses. MATERIAL AND METHODS: A review is presented with a synthesised discussion on the pathophysiological theories of presbyopia and an updated and analytical description of the non-lens involvement surgical techniques used to treat presbyopia...
June 14, 2017: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/28622144/a-technological-advance-for-21st-century-obstetricians-the-electronically-controlled-vacuum-extractor
#13
Nicola Perone
OBJECTIVE: To describe an innovative electronically-controlled vacuum extractor (VE) in detail and to illustrate its performance characteristics, as observed in a laboratory study. DESIGN: Thirty simulated, vacuum-assisted deliveries. MAIN OUTCOME MEASURE(S): (1) The ability to measure in real-time of the pull applied and to sound an alert, when the traction approaches the negative pressure under the cup, to prevent its detachment. (2) The recording and printing of a graphic representation of the pull applied (vacuum delivery graph)...
June 5, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28621979/model-of-cell-crawling-controlled-by-mechanosensitive-adhesion
#14
M Leoni, P Sens
We study the motility of model cells and biomimetic soft objects crawling over a substrate covered with adhesive linkers. The cell exerts traction forces on the substrate through the active periodic motion of molecular complexes to which the linkers bind and unbind stochastically. We first show that the diffusion coefficient of a force dipole (unable by symmetry to perform directed motion) is maximal for a finite ratio of the unbinding to binding rates, highlighting the role of adhesion kinetics on cell translocation...
June 2, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28620171/mechanical-stability-of-talin-rod-controls-cell-migration-and-substrate-sensing
#15
Rolle Rahikainen, Magdaléna von Essen, Markus Schaefer, Lei Qi, Latifeh Azizi, Conor Kelly, Teemu O Ihalainen, Bernhard Wehrle-Haller, Martin Bastmeyer, Cai Huang, Vesa P Hytönen
Cells adhere to the surrounding tissue and probe its mechanical properties by forming cell-matrix adhesions. Talin is a critical adhesion protein and participates in the transmission of mechanical signals between extracellular matrix and cell cytoskeleton. Force induced unfolding of talin rod subdomains has been proposed to act as a cellular mechanosensor, but so far evidence linking their mechanical stability and cellular response has been lacking. Here, by utilizing computationally designed mutations, we demonstrate that stepwise destabilization of the talin rod R3 subdomain decreases cellular traction force generation, which affects talin and vinculin dynamics in cell-matrix adhesions and results in the formation of talin-rich but unstable adhesions...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28617192/emerging-biologic-therapies-for-hypercholesterolaemia
#16
Giacomo Pucci, Arrigo F Cicero, Claudio Borghi, Giuseppe Schillaci
LDL-cholesterol (LDL-C) is one of the most well-established risk factors for CV disease. Indeed, therapies that decrease LDL-C are proven to effectively reduce the risk of atherosclerotic CV disease. Monoclonal antibodies (mAbs) that target proprotein convertase subtilisin/kexin type 9 (PCSK9) have recently gained traction as a promising therapeutic strategy. Areas covered: In this review, the authors discuss the effectiveness of mAbs against PCSK9 in lowering low-density lipoprotein cholesterol (LDL-C) and other atherogenic lipid fractions...
June 15, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/28616400/tips-for-safety-in-endoscopic-submucosal-dissection-for-colorectal-tumors
#17
REVIEW
Naohisa Yoshida, Yuji Naito, Takaaki Murakami, Ryohei Hirose, Kiyoshi Ogiso, Yutaka Inada, Rafiz Abdul Rani, Mitsuo Kishimoto, Masayoshi Nakanishi, Yoshito Itoh
In Japan, endoscopic submucosal dissection (ESD) becomes one of standard therapies for large colorectal tumors. Recently, the efficacy of ESD has been reported all over the world. However, it is still difficult even for Japanese experts in some situations. Right-sided location, large tumor size, high degree of fibrosis, difficult manipulation is related with the difficulty. However, improvements on ESD devices, suitable strategies, and increase of operators' experiences enable us to solve these problems. In this chapter, we introduce recent topics about various difficult factors of colorectal ESD and the tips such as strategy, devices, injection, and traction method [Pocket-creation method (PCM) etc...
April 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28614893/traction-strategy-with-clips-and-rubber-band-allows-complete-en-bloc-endoscopic-submucosal-dissection-of-laterally-spreading-tumors-invading-the-appendix
#18
Erika Utzeri, Jérémie Jacques, Aurélie Charissoux, Jérôme Rivory, Romain Legros, Thierry Ponchon, Mathieu Pioche
No abstract text is available yet for this article.
June 14, 2017: Endoscopy
https://www.readbyqxmd.com/read/28614614/clarifying-the-landscape-approach-a-letter-to-the-editor-on-integrated-landscape-approaches-to-managing-social-and-environmental-issues-in-the-tropics
#19
James Erbaugh, Arun Agrawal
The landscape approach (LA) to multi-functional land management has gained traction among international organizations working toward sustainable development. World leaders have pledged to restore 350 Mha by 2030 using the LA. Governments, multinational agencies, and NGOs are key stakeholders (Bonn 2016). This article is protected by copyright. All rights reserved.
June 14, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28613935/obstructive-sleep-apnea-and-subclinical-interstitial-lung-disease-in-mesa
#20
John S Kim, Anna J Podolanczuk, Priya Borker, Steven M Kawut, Ganesh Raghu, Joel D Kaufman, Karen D Hinckley Stukovsky, Eric A Hoffman, R Graham Barr, Daniel J Gottlieb, Susan S Redline, David J Lederer
RATIONALE: Obstructive sleep apnea (OSA) has been postulated to contribute to idiopathic pulmonary fibrosis by promoting alveolar epithelial injury via tractional forces and intermittent hypoxia. OBJECTIVE: To determine whether OSA is associated with subclinical interstitial lung disease (ILD) and with biomarkers of alveolar epithelial injury and remodeling. METHODS: We performed cross-sectional analyses of 1,690 community-dwelling adults who underwent 15-channel in-home polysomnography and thoracic computed tomography (CT) imaging in the Multi-Ethnic Study of Atherosclerosis...
June 14, 2017: Annals of the American Thoracic Society
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