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https://www.readbyqxmd.com/read/27917825/molecular-symmetry-constrained-systematic-search-approach-to-structure-solution-of-the-coiled-coil-srgap2-f-barx-domain
#1
Michael Sporny, Julia Guez-Haddad, David G Waterman, Michail N Isupov, Yarden Opatowsky
SRGAP2 (Slit-Robo GTPase-activating protein 2) is a cytoplasmic protein found to be involved in neuronal branching, restriction of neuronal migration and restriction of the length and density of dendritic postsynaptic spines. The extended F-BAR (F-BARx) domain of SRGAP2 generates membrane protrusions when expressed in COS-7 cells, while most F-BARs induce the opposite effect: membrane invaginations. As a first step to understand this discrepancy, the F-BARx domain of SRGAP2 was isolated and crystallized after co-expression with the carboxy domains of the protein...
December 1, 2016: Acta Crystallographica. Section D, Structural Biology
https://www.readbyqxmd.com/read/27902945/artificial-cervical-disc-replacement-with-the-prestige-lp-prosthesis-for-the-treatment-of-non-contiguous-2-level-cervical-degenerative-disc-disease-a-minimum-24-month-follow-up
#2
Tingkui Wu, Beiyu Wang, Chen Ding, Yang Meng, Jigang Lou, Yi Yang, Hao Liu
OBJECTIVE: We describe the features of non-contiguous 2-level cervical degenerative disc disease (NCDDD), investigate the safety and feasibility of artificial cervical disc replacement (ACDR) for the treatment of NCDDD, and expect that our study will provide spine surgeons with an alternative procedure for NCDDD. METHODS: Twenty-five patients with NCDDD received ACDR with a Prestige-LP prosthesis. Clinical outcomes were evaluated using the 36-Short Form (SF-36, Mental Component Summary [MCS] and Physical Component Summary [PCS]), Visual Analog Scale (VAS), Japanese Orthopedic Association (JOA), and Neck Disability Index (NDI) scores...
November 17, 2016: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/27888676/revision-surgery-for-cervical-artificial-disc-surgical-technique-and-clinical-results
#3
J Onken, A Reinke, J Radke, T Finger, S Bayerl, P Vajkoczy, B Meyer
OBJECTIVE: Cervical artificial disc replacement (C-ADR) was developed with the goal of preserving mobility of the cervical segment in patients with degenerative disc disease. So far, little is known about experiences with revision surgery and explantation of C-ADRs. Here, we report our experience with revision the third generation, Galileo-type disc prosthesis from a retrospective study of two institutions. PATIENTS AND METHODS: Between November 2008 and July 2016, 16 patients with prior implantation of C-ADR underwent removal of the Galileo-type disc prosthesis (Signus, Medizintechnik, Germany) due to a call back by industry...
October 31, 2016: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/27886715/a-software-program-to-measure-the-three-dimensional-length-of-the-spine-from-radiographic-images-validation-and-reliability-assessment-for-adolescent-idiopathic-scoliosis
#4
Steve Berger, Carol-Claudius Hasler, Caroline A Grant, Guoyan Zheng, Steffen Schumann, Philippe Büchler
BACKGROUND AND OBJECTIVE: The aim of this study was to validate a new program which aims at measuring the three-dimensional length of the spine's midline based on two calibrated orthogonal radiographic images. The traditional uniplanar T1-S1 measurement method is not reflecting the actual three dimensional curvature of a scoliotic spine and is therefore not accurate. The Spinal Measurement Software (SMS) is an alternative to conveniently measure the true spine's length. METHODS: The validity, inter- and intra-observer variability and usability of the program were evaluated...
January 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/27871971/speed-bridge-arthroscopic-reinsertion-of-tibial-eminence-fracture-complementary-to-the-adjustable-button-fixation-technique
#5
A Hardy, L Casabianca, O Grimaud, A Meyer
In comminuted fracturesof the intercondyloid eminence of the tibial spine, the quality of the reduction and the arthroscopic fixation, notably adjustable suture buttonfixation, is sometimes disappointing with reduction defects of theanterior bone block. In the Speed-Bridge technique, the two traction sutures of the adjustable button fixation are replaced with two braided sutures of different colors. After the button is placed above the eminence, reduction is obtained by tightening the loop of the button. The accessory communitive fragments are then packed in the depressionaround the main fragment...
November 18, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27869243/personal-risk-factors-for-carpal-tunnel-syndrome-in-female-visual-display-unit-workers
#6
Matteo Riccò, Silvia Cattani, Carlo Signorelli
OBJECTIVES: Carpal tunnel syndrome (CTS) is the most common nerve entrapment syndrome, which since the beginning of the seventies has been linked to the keyboard and visual display unit (VDU). The objective of this study was to investigate the prevalence and personal factors associated with CTS in female VDU workers in Italy. MATERIAL AND METHODS: Participants in this study were female adult subjects, working ≥ 20 h/week (N = 631, mean age 38.14±7.81 years, mean working age 12...
November 18, 2016: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/27862019/bent-spine-syndrome-as-the-initial-symptom-of-late-onset-pompe-disease
#7
Nicolas Taisne, Claude Desnuelle, Raul Juntas Morales, Xavier Ferrer Monasterio, Sabrina Sacconi, Fanny Duval, Guilhem Sole, René Marc Flipo, Arnaud Lacour, Patrick Vermersch, Thierry Cardon
INTRODUCTION: Late-onset Pompe disease (LOPD) is a rare disorder characterized by progressive proximal muscle weakness and early respiratory insufficiency, for which enzyme replacement therapy (ERT) is available. METHODS: Having diagnosed a case of LOPD presenting with bent spine syndrome, we conducted a brief survey in the French centers involved in management of Pompe disease, from which we collected data on 3 other cases. RESULTS: The patients (3 women and 1 man) had a mean age of 64 years (range 51-77 years) and a delay in diagnosis of approximately 10 years (range 8-42 years)...
November 15, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27835935/a-new-vertebral-body-replacement-strategy-using-expandable-polymeric-cages
#8
Xifeng Liu, Alex Paulsen, Hugo Giambini, Ji Guo, Alan Miller, Po-Chun Lin, Michael J Yaszemski, Lichun Lu
We have developed a novel polymeric expandable cage that can be delivered via a posterior-only surgical approach for the treatment of non-contained vertebral defects. This approach is less invasive than an anterior-only or combined approach and much more cost effective than currently used expandable metal cages. The polymeric expandable cage is composed of oligo poly(ethylene glycol) fumarate (OPF), a hydrogel that has been previously shown to have excellent nerve and bone tissue biocompatibility. OPF hydrogel cages can expand to twice their original diameter and length within a surgical time frame following hydration...
November 11, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27831507/surgical-management-of-complex-residual-masses-following-systemic-chemotherapy-for-metastatic-testicular-germ-cell-tumours
#9
A Heidenreich, F Haidl, P Paffenholz, Ch Pape, U Neumann, D Pfister
BACKGROUND: Postchemotherapy retroperitoneal lymphadenectomy (PC-RPLND) represents the treatment of choice in patients with residual masses following chemotherapy for metastatic germ cell tumors. Involvement of major retroperitoneal vessels or thoracic/lumbar spine is rare and challenging but needs complete resection for curative intent. We report on our experience in the management of such complex cases. PATIENTS AND METHODS: A total of 185 patients underwent PC-RPLND and we identified 25 (13...
November 9, 2016: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/27818821/disseminated-cerebrospinal-embryonal-tumor-in-the-adult
#10
Alessandro Caporlingua, Daniele Armocida, Federico Caporlingua, Gennaro Lapadula, Grazia Maria Elefante, Manila Antonelli, Maurizio Salvati
Introduction. According to the 2016 World Health Organization classification of Tumors of the Central Nervous System, the term Primitive Neuroectodermal Tumor has been replaced by the term Embryonal Tumor (ET). We present a case of disseminated cerebrospinal ET presenting in an adult patient. Illustrative Case. A 49-year-old male presenting with low back pain, dysuria, and hypoesthesia of the lower extremities referred to our emergency department. Brain and whole spine contrast-enhanced MRI documented a diffusively disseminated heterogeneous neoplasm with intradural extra- and intramedullary involvement of the cervicothoracic tract and cauda equina...
2016: Case Reports in Pathology
https://www.readbyqxmd.com/read/27814888/dynamic-contrast-enhanced-magnetic-resonance-angiography-for-the-localization-of-spinal-dural-arteriovenous-fistulas-at-3t
#11
G Zhou, M H Li, C Lu, Y L Yin, Y Q Zhu, X E Wei, H T Lu, Q Q Zheng, W W Gao
OBJECTIVE: This study was undertaken to evaluate the accuracy of dynamic contrast-enhanced magnetic resonance angiography (DCE-MRA) in the precise location and demonstration of fistulous points in spinal dural arteriovenous fistulas (SDAVFs). METHODS: Fifteen patients (14 men, 1 woman; age range: 40-78 years; mean: 55.5 years) harboring SDAVF who underwent preoperative DCE-MRA and spinal digital subtraction angiography (DSA) between January 2012 and January 2015 were evaluated retrospectively...
November 1, 2016: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/27783592/transplanted-embryonic-neurons-integrate-into-adult-neocortical-circuits
#12
Susanne Falkner, Sofia Grade, Leda Dimou, Karl-Klaus Conzelmann, Tobias Bonhoeffer, Magdalena Götz, Mark Hübener
The ability of the adult mammalian brain to compensate for neuronal loss caused by injury or disease is very limited. Transplantation aims to replace lost neurons, but the extent to which new neurons can integrate into existing circuits is unknown. Here, using chronic in vivo two-photon imaging, we show that embryonic neurons transplanted into the visual cortex of adult mice mature into bona fide pyramidal cells with selective pruning of basal dendrites, achieving adult-like densities of dendritic spines and axonal boutons within 4-8 weeks...
October 26, 2016: Nature
https://www.readbyqxmd.com/read/27761411/30-months-follow-up-of-an-early-enzyme-replacement-therapy-in-a-severe-morquio-a-patient-about-one-case
#13
J Do Cao, A Wiedemann, T Quinaux, S F Battaglia-Hsu, L Mainard, R Froissart, C Bonnemains, S Ragot, B Leheup, P Journeau, F Feillet
: Patients under 5 years were not evaluated in the phase-3 study for enzyme replacement therapy (ERT) in MPS IV A. Here we describe the evolution of a severe Morquio A pediatric patient who was diagnosed at 19 months old and treated by ERT at 21 months old for the next 30 months. Applying the standard ERT protocol on this very young patient appeared to reduce his urinary excretion of glycosaminoglycans (GAGs); the improvements in both the 6 minute-walk test (6MWT) and the stair climb test, however, were no different than those reported in the nature history study...
December 2016: Molecular Genetics and Metabolism Reports
https://www.readbyqxmd.com/read/27761194/alk-positive-anaplastic-large-cell-lymphoma-of-the-thoracic-spine
#14
Gabriela Abrego, Julio García, Bruce Gilbert, Scott Forseen, Michael Toscano
Primary bone lymphoma (PBL) is an uncommon extra nodal disease that represents about 1-3% of lymphoma cases. Imaging findings are variable and non-specific. Computed tomography may demonstrate lytic lesions with sequestra and periosteal reaction. On magnetic resonance imaging, lesions are T1WI hypointense and T2WI hyperintense, related to peritumoral edema or bone marrow replacement. Rarely lesions may have associated fibrosis and show a more hypointense signal pattern on T2WI. After administration of contrast, PBL tends to enhance avidly...
September 2016: Journal of Radiology Case Reports
https://www.readbyqxmd.com/read/27757772/skeletal-changes-after-restoration-of-the-euparathyroid-state-in-patients-with-hypoparathyroidism-and-primary-hyperparathyroidism
#15
Cristiana Cipriani, Alice Abraham, Barbara C Silva, Natalie E Cusano, Mishaela R Rubin, Donald J McMahon, Chengchen Zhang, Didier Hans, Shonni J Silverberg, John P Bilezikian
Restoration of the euparathyroid state is associated with improvement of bone dynamics both in hypoparathyroidism and primary hyperparathyroidism. To date, no study has directly compared these two groups following correction of parathyroid hormone excess or deficiency. The study was designed to investigate changes in bone mineral density and trabecular bone score with restoration of the euparathyroid state by parathyroidectomy in primary hyperparathyroidism or recombinant parathyroid hormone [rhPTH(1-84)] replacement in hypoparathyroidism...
October 18, 2016: Endocrine
https://www.readbyqxmd.com/read/27755491/clinical-outcomes-of-outpatient-cervical-total-disc-replacement-compared-to-outpatient-anterior-cervical-discectomy-and-fusion
#16
Kingsley R Chin, Fabio J R Pencle, Jason A Seale, Franz K Pencle
STUDY DESIGN: A single-center, retrospective study. OBJECTIVE: To determine the safety and outcomes of total disc replacement (TDR) as an outpatient procedure in the ambulatory surgery center (ASC). SUMMARY OF BACKGROUND DATA: Anterior cervical discectomy and fusion (ACDF) has been demonstrated to be safe in the outpatient setting. As the awareness of same day surgery procedures is on the rise due to better outcome and shorter recovery time...
October 17, 2016: Spine
https://www.readbyqxmd.com/read/27755207/imaging-evaluation-and-relative-significance-in-cases-of-cervical-disk-allografting-radiographic-character-after-total-disk-transplantation
#17
Yu Ding, Di-Ke Ruan, Qing He, Li Sheng Hou, Jian Ning Lin, Hong Peng Cui
STUDY DESIGN: The clinical and radiologic data of total disk allografting (TDA) cases were collected and analyzed to explore the correlation between neurological function improvements and imaging changes. OBJECTIVE: The aim of the study was to assess the medium-term and long-term outcome and radiographic character after TDA, and, furthermore, to explore the significance of the changes of imaging signs after the transplantation. SUMMARY OF BACKGROUND DATA: Spinal fusion may result in the adjacent segment degeneration...
November 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27753787/best-practices-for-outpatient-anterior-cervical-surgery-results-from-a-delphi-panel
#18
Anita Mohandas, Chris Summa, W Bradley Worthington, Jason Lerner, Kevin T Foley, Robert J Bohinski, Gregory B Lanford, Carol Holden, Richard N W Wohns
STUDY DESIGN: Delphi Panel expert panel consensus and narrative literature review OBJECTIVE.: To obtain expert consensus on best practices for patient selection and perioperative decision making for outpatient anterior cervical surgery (anterior cervical disc fusion (ACDF) and cervical total disc replacement (CTDR)). SUMMARY OF BACKGROUND DATA: Spine surgery in ambulatory settings is becoming a preferred option for both patients and providers. The transition from traditional inpatient environments has been enabled by innovation in anesthesia protocols and surgical technique, as well as favorable economics...
October 6, 2016: Spine
https://www.readbyqxmd.com/read/27728925/-diagnostic-algorithm-for-failure-analysis-of-painful-total-hip-arthroplasties
#19
B Fink, R Lass
Background: Total hip arthroplasty (THA) is one of the most common and successful surgical procedures in orthopedic surgery and clinical success can be characterized by the revision rate and improvement of function, as well as the patient's satisfaction and pain. Despite the clinical success of primary THA with 10-year survival rates as high as 96 % (Swedish Hip Arthroplasty Register, 2011), the prevalence of groin pain after conventional total hip replacement ranges from 0.4 to 18.3 % and activity-limiting thigh pain is still an existing problem linked to the femoral component of uncemented hip replacement in up to 1...
October 2016: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/27684965/imaging-cell-viability-on-non-transparent-scaffolds-using-the-example-of-a-novel-knitted-titanium-implant
#20
Gauri Tendulkar, Phillip Grau, Patrick Ziegler, Alfred Buck, Alfred Buck, Andreas Badke, Hans-Peter Kaps, Sabrina Ehnert, Andreas K Nussler
Intervertebral disc degeneration and disc herniation is one of the major causes of lower back pain. Depletion of extracellular matrix, culminating in nucleus pulposus (NP) extrusion leads to intervertebral disc destruction. Currently available surgical treatments reduce the pain but do not restore the mechanical functionality of the spine. In order to preserve mechanical features of the spine, total disc or nucleus replacement thus became a wide interest. However, this arthroplasty era is still in an immature state, since none of the existing products have been clinically evaluated...
2016: Journal of Visualized Experiments: JoVE
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