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https://www.readbyqxmd.com/read/28822010/vitrification-of-human-immature-oocytes-before-and-after-in-vitro-maturation-a-review
#1
REVIEW
Mohammad Ali Khalili, Abbas Shahedi, Sareh Ashourzadeh, Stefania Annarita Nottola, Guido Macchiarelli, Maria Grazia Palmerini
The use of immature oocytes subjected to in vitro maturation (IVM) opens interesting perspectives for fertility preservation where ovarian reserves are damaged by pathologies or therapies, as in PCO/PCOS and cancer patients. Human oocyte cryopreservation may offer some advantages compared to embryo freezing, such as fertility preservation in women at risk of losing fertility due to oncological treatment or chronic disease, egg donation and postponing childbirth. It also eliminates religious and/or other ethical, legal, and moral concerns of embryo freezing...
August 18, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28821642/super-optimal-perceptual-integration-suggests-a-place-based-representation-of-pitch-at-high-frequencies
#2
Bonnie K Lau, Anahita H Mehta, Andrew J Oxenham
Pitch, the perceptual correlate of sound repetition rate or frequency, plays an important role in speech perception, music perception, and listening in complex acoustic environments. Despite its perceptual importance, the neural mechanisms underlying pitch remain poorly understood. Although cortical regions responsive to pitch have been identified, little is known about how pitch information is extracted from the inner ear itself. The two primary theories of peripheral pitch coding involve stimulus-driven spike timing, or phase locking, in the auditory nerve (time code), and the spatial distribution of responses along the length of the cochlear partition (place code)...
August 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28820949/association-between-patient-factors-and-outcome-of-synthetic-cartilage-implant-hemiarthroplasty-vs-first-metatarsophalangeal-joint-arthrodesis-in-advanced-hallux-rigidus
#3
Andy Goldberg, Dishan Singh, Mark Glazebrook, Chris M Blundell, Gwyneth De Vries, Ian L D Le, Dominic Nielsen, M Elizabeth Pedersen, Anthony Sakellariou, Matthew Solan, Alastair S E Younger, Timothy R Daniels, Judith F Baumhauer
BACKGROUND: We evaluated data from a clinical trial of first metatarsophalangeal joint (MTPJ1) implant hemiarthroplasty and arthrodesis to determine the association between patient factors and clinical outcomes. METHODS: Patients ≥18 years with hallux rigidus grade 2, 3, or 4 were treated with synthetic cartilage implant MTPJ1 hemiarthroplasty or arthrodesis. Pain visual analog scale (VAS), Foot and Ankle Ability Measure (FAAM) sports and activities of daily living (ADL) scores, and Short Form-36 Physical Function (SF-36 PF) subscore were obtained preoperatively, and at 2, 6, 12, 24, 52, and 104 weeks postoperatively...
August 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28820542/efficacy-and-complications-of-transcatheter-aortic-valve-implantation-with-and-without-balloon-aortic-valvuloplasty
#4
Kuljit Singh, Kristin Carson, Onn Akbar Ali, Rohan Jayasinghe, Alexander Dick, Christopher Glover, Marino Labinaz
BACKGROUND: Transcatheter aortic valve implantation (TAVI) is an effective treatment for severe aortic stenosis in high-risk patients. Several complications related to the TAVI procedure, including aortic regurgitation (AR), cerebrovascular accident (CVA) and the requirement for permanent pacemaker (PPM), are thought to be secondary to balloon aortic valvuloplasty (BAV) before TAVI. The aim of the present review was to evaluate any beneficial role of the direct TAVI approach over BAVTAVI...
March 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28819983/an-evaluation-of-the-effectiveness-of-a-risk-based-monitoring-approach-implemented-with-clinical-trials-involving-implantable-cardiac-medical-devices
#5
Christopher A Diani, Angie Rock, Phil Moll
Background Risk-based monitoring is a concept endorsed by the Food and Drug Administration to improve clinical trial data quality by focusing monitoring efforts on critical data elements and higher risk investigator sites. BIOTRONIK approached this by implementing a comprehensive strategy that assesses risk and data quality through a combination of operational controls and data surveillance. This publication demonstrates the effectiveness of a data-driven risk assessment methodology when used in conjunction with a tailored monitoring plan...
August 1, 2017: Clinical Trials: Journal of the Society for Clinical Trials
https://www.readbyqxmd.com/read/28819953/impact-of-post-dilatation-on-the-reduction-of-paravalvular-leak-and-mortality-after-transcatheter-aortic-valve-implantation
#6
Paweł Kleczyński, Artur Dziewierz, Marzena Daniec, Maciej Bagieński, Łukasz Rzeszutko, Danuta Sorysz, Jarosław Trębacz, Robert Sobczyński, Marek Tomala, Dariusz Dudek
BACKGROUND: Post-implantation paravalvular leak (PVL) remains a significant complication of transcatheter aortic valve implantation (TAVI). More importantly, its occurrence may impact long-term mortality. AIM: We sought to evaluate the effects of balloon post-dilatation (PD) on the reduction of PVL and mortality in patients undergoing TAVI. METHODS: A total of 101 consecutive patients undergoing TAVI were enrolled. Angiography, echocardiography, and the aortic regurgitation index (ARI) were used to assess the severity of PVL before and after balloon PD...
2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28819879/lower-extremity-bypass-using-bovine-carotid-artery-graft-artegraft-an-analysis-of-124-cases-with-long-term-results
#7
Philip Lindsey, Angela Echeverria, Mathew Cheung, Elias Kfoury, Carlos F Bechara, Peter H Lin
INTRODUCTION: Although biological grafts have been utilized as a vascular conduit in leg bypass for many years, reports of a bovine carotid artery graft (BCAG) in lower extremity revascularization have been scarce. This study analyzed the outcome of lower leg bypass using BCAG. METHODS: A retrospective review of a prospectively collected database of all patients undergoing lower extremity bypass using BCAG from 2002 to 2017 was performed. Clinical outcomes including graft patency and limb salvage were evaluated...
August 17, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28819836/management-of-contralateral-breast-following-mastectomy-and-breast-reconstruction-using-a-mirror-adjustment-with-crescent-mastopexy-technique
#8
A Cogliandro, B Brunetti, Mauro Barone, G Favia, P Persichetti
INTRODUCTION: Heterologous breast reconstruction after mastectomy sometimes requires the management of the contralateral breast to achieve symmetric long lasting aesthetic results. Some techniques could be used for the symmetrization of contralateral breast with or without implants as breast augmentation, reduction mammoplasty, mastopexy, with T inverted, J, vertical, periareolar, semi-circular, or axillary scars. The aim of this study is to present the use of crescent mastopexy technique with implants in contralateral adjustment following monolateral breast reconstruction compared with a control group in which patients underwent other contralateral procedures...
August 17, 2017: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/28819826/the-outcome-of-the-partial-resurfacing-arthroplasty-of-the-hip-shows-high-numbers-of-failures-and-conversion-to-total-arthroplasty
#9
Thilo Floerkemeier, Stefan Budde, Nils Wirries, Gabriela von Lewinski, Henning Windhagen, Marco Ezechieli
PURPOSE: Local cartilage and bony defects, which are too large for joint preserving cartilage treatment are difficult to treat. The implantation of a mini-resurfacing implant (Hemicap®, 2med, Hamburg, Germany) may be a possible alternative treatment for these patients. This partial replacement fills the defect and restores a smooth and continuous articular surface. The aim of this study was to determine short- to midterm results of the treatment of local cartilage defects of the femoral head using the Hemicap®...
August 17, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28819694/thoracic-corpectomy-for-neoplastic-vertebral-bodies-using-a-navigated-lateral-extracavitary-approach-a-single-center-consecutive-case-series-technique-and-analysis
#10
Sebastian Hartmann, Christoph Wipplinger, Anja Tschugg, Pujan Kavakebi, Alexander Örley, Pierre Pascal Girod, Claudius Thomé
Thoracic myelopathy is often caused by vertebral body fractures resulting from neoplastic conditions, traumatic events, or infectious diseases. One of the preferred procedures for treating it is the lateral extracavitary approach (LECA) with single-level or multilevel decompressive corpectomy and reconstruction. The aim of this retrospective study was to analyze the thoracic lateral extracavitary approach with corpectomy using vertebral body replacement systems (VBR-S) and dorsal reconstruction. Twenty-four patients with metastatic or primary lesions of thoracic vertebrae T2-T12 underwent spinal decompression and ventral column reconstruction with correction of spinal deformity via a LECA...
August 17, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28819116/silencing-of-tgf-%C3%AE-1-in-tumor-cells-impacts-mmp-9-in-tumor-microenvironment
#11
Lakisha D Moore-Smith, Tatyana Isayeva, Joo Hyoung Lee, Andra Frost, Selvarangan Ponnazhagan
Transforming growth factor (TGF)-β1 contributes to autocrine and paracrine functions in the tumor microenvironment (TME). The present study examined the effects of TGF-β1 crosstalk in TME and its role in mediating tumor formation and progression by targeted abrogation of TGF-β1 expression in metastatic cells in situ. Using species-specific primers, we found a significant increase in MMP-9 gene expression in the tumor-reactive stroma during late-stage metastasis in the lung. This effect was also confirmed in cancer-associated fibroblasts (CAFs) when co-cultured with the tumor cells...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819064/the-tumor-microenvironment-regulates-sensitivity-of-murine-lung-tumors-to-pd-1-pdl1-antibody-blockade
#12
Howard Y Li, Maria V McSharry, Bonnie Bullock, Teresa T Nguyen, Jeff Kwak, Joanna M Poczobutt, Trisha R Sippel, Lynn E Heasley, Mary C Weiser-Evans, Eric T Clambey, Raphael A Nemenoff
Immune checkpoint inhibitors targeting the interaction between programmed cell death-1 (PD-1) and its ligand PD-L1 induce tumor regression in a subset of non-small cell lung cancer patients. However, clinical response rates are less than 25%. Evaluation of combinations of immunotherapy with existing therapies requires appropriate pre-clinical animal models. In this study, murine lung cancer cells (CMT167 and LLC) were implanted either orthotopically in the lung or subcutaneously in--- syngeneic mice, and response to anti-PD-1/PD-L1 therapy was determined...
August 17, 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/28819055/temperature-effects-on-the-cardiorespiratory-control-of-american-bullfrog-tadpoles-based-on-a-non-invasive-methodology
#13
Leonardo S Longhini, Lucas A Zena, Glauber S F da Silva, Kênia C Bícego, Luciane H Gargaglioni
Temperature effects on cardiac autonomic tonus in amphibian larval stages have never been investigated. Therefore, we evaluated the effect of different temperatures (15°C, 25°C, and 30°C) on the cardiorespiratory rates and cardiac autonomic tonus of premetamorphic bullfrog tadpoles, Lithobates catesbeianus To this end, a non-invasive method was developed to permit measurements of electrocardiogram (ECG) and buccal movements (fB ; surface electromyography of the buccal floor). For evaluation of autonomic regulation, intraperitoneal injections of Ringer's solution (control), atropine (cholinergic muscarinic antagonist), and sotalol (β-adrenergic antagonist) were performed...
August 17, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28818688/anodization-of-magnesium-for-biomedical-applications-processing-characterization-degradation-and-cytocompatibility
#14
Aaron F Cipriano, Jiajia Lin, Christopher Miller, Alan Lin, Mayra C Cortez Alcaraz, Pedro Soria, Huinan Liu
This article reports anodization of Mg in KOH electrolyte and the associated surface, degradation, and biological properties for bioresorbable implant applications. The preparation procedures for electrodes and anodization setup significantly enhanced reproducibility of samples. The results of anodization performed at the applied potentials of 1.8, 1.9, or 2.0 V showed that the sample anodized at 1.9 V and annealed, referred to as the 1.9 AA sample, had homogenous surface microstructure and elemental composition, and a reduction in corrosion current density in the electrochemical testing...
August 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28818615/deep-transcriptome-profiling-sheds-light-on-key-players-in-nucleus-implantation-induced-immune-response-in-the-pearl-oyster-pinctada-martensii
#15
Wei Wang, Yuyuan Wu, Qiannan Lei, Haiying Liang, Yuewen Deng
Immunological rejection of the pearl oysters following nucleus implantation is a major issue limiting the successful rate of cultured pearls. To date, the molecular mechanism of immune tolerance during pearl formation in the pearl oysters is still largely unknown. Through the RNA sequencing platform and comparative transcriptomic analysis, we investigated the chronic gene expression changes at seven time points (0, 5, 10, 15, 20, 30, 60 days post implantation or dpi) over a period of 60 days following nucleus implantation in the pearl oyster Pinctada martensii...
August 14, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28818562/conduction-recovery-and-avoidance-of-permanent-pacing-after-transcatheter-aortic-valve-implantation
#16
Corinne Marzahn, Cornel Koban, Martin Seifert, Akihiro Isotani, Michael Neuß, Frank Hölschermann, Christian Butter
BACKGROUND: Transcatheter aortic valve implantation (TAVI) is an established treatment option for patients with severe aortic stenosis and high surgical risk. Currently, various prosthesis types are available. Atrioventricular block (AVB) requiring pacemaker (PM) implantation is a typical complication after TAVI. This study investigated the recovery of AV node conduction and mid-term outcome of patients with or without PM implantation after TAVI according to prosthesis type. METHODS: From July 2008 to May 2015, 856 transcatheter heart valves were implanted at our center (age: 80...
August 14, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28818455/adipose-derived-stromal-cells-enhance-auditory-neuron-survival-in-an-animal-model-of-sensory-hearing-loss
#17
Philipp Schendzielorz, Maike Vollmer, Kristen Rak, Armin Wiegner, Nashwa Nada, Katrin Radeloff, Rudolf Hagen, Andreas Radeloff
BACKGROUND: A cochlear implant (CI) is an electronic prosthesis that can partially restore speech perception capabilities. Optimum information transfer from the cochlea to the central auditory system requires a proper functioning auditory nerve (AN) that is electrically stimulated by the device. In deafness, the lack of neurotrophic support, normally provided by the sensory cells of the inner ear, however, leads to gradual degeneration of auditory neurons with undesirable consequences for CI performance...
August 14, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28818323/medial-buttress-plate-augmentation-of-cannulated-screw-fixation-in-vertically-unstable-femoral-neck-fractures-surgical-technique-and-preliminary-results
#18
Ye Ye, Ke Chen, Kewei Tian, Wuyin Li, Cyril Mauffrey, David J Hak
OBJECTIVE: To evaluate the outcome and complications of unstable Pauwels type 3 femoral neck fractures treated with a combination fixation of three cannulated screws and a medial buttress plate. PATIENTS AND METHODS: From October 2015 to June 2016, 28 patients under 60 years of age with Pauwels type 3 femoral neck fracture were treated with open reduction and internal fixation using a direct anterior approach. Fracture consisted of three cannulated screws augmented with a medial buttress plate...
August 9, 2017: Injury
https://www.readbyqxmd.com/read/28818219/contemporary-outcomes-after-venography-guided-treatment-of-patients-with-may-thurner-syndrome
#19
Johnathon C Rollo, Steven M Farley, Adam Z Oskowitz, Karen Woo, Brian G DeRubertis
OBJECTIVE: Patients with May-Thurner syndrome (MTS) present with a spectrum of findings ranging from mild left leg edema to extensive iliofemoral deep venous thrombosis (DVT). Whereas asymptomatic left common iliac vein (LCIV) compression can be seen in a high proportion of normal individuals on axial imaging, the percentage of these persons with symptomatic compression is small, and debate exists about the optimal clinical and diagnostic criteria to treat these lesions in patients with symptomatic venous disease...
September 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28817738/compliance-with-supportive-periodontal-treatment-in-patients-with-dental-implants
#20
Kai-Fang Hu, Ying-Chu Lin, Kun-Yen Ho, Yu-Hsiang Chou
PURPOSE: The need for dental implants is increasing, and supportive periodontal treatment can achieve long-term success and prevent peri-implantitis. Contributing factors to noncompliance with long-term scheduled supportive periodontal treatment remain unclear. To investigate whether demographic and clinical characteristics are associated with noncompliance, the authors analyzed data for patients who had received dental implants. MATERIALS AND METHODS: The authors recruited patients participating in a supportive periodontal treatment program after receiving permanent prostheses on implants placed from 2005 to 2013...
August 17, 2017: International Journal of Oral & Maxillofacial Implants
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