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https://www.readbyqxmd.com/read/28632534/administration-of-tetrahydrobiopterin-bh4-protects-the-renal-microcirculation-from-ischemia-and-reperfusion-injury
#1
Lokmane Rahmania, Diego Orbegozo, Fuhong Su, Fabio Silvio Taccone, Jean-Louis Vincent, Daniel De Backer
BACKGROUND: Abdominal aortic aneurysm surgery with suprarenal cross-clamping is often associated with renal injury. Although the mechanism underlying such injury is unclear, tissue ischemia and reperfusion, which induces endothelial dysfunction and decreases the availability of tetrahydrobiopterin (BH4), may play a role. We evaluated whether BH4 administration prevents renal ischemia/reperfusion injury in an animal model of aortic cross-clamping. METHODS: Nineteen anesthetized, mechanically ventilated, and invasively monitored adult sheep were randomized into 3 groups: sham animals (n = 5) that underwent surgical preparation but no aortic clamping; an ischemia/reperfusion group (n = 7), where the aorta was clamped above the renal arteries for 1 hour, and a BH4 group (n = 7), in which animals received 20 mg/kg of BH4 followed by aortic cross-clamp for 1 hour...
June 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28624712/classification-of-ecg-heartbeats-using-nonlinear-decomposition-methods-and-support-vector-machine
#2
Kandala N V P S Rajesh, Ravindra Dhuli
Classifying electrocardiogram (ECG) heartbeats for arrhythmic risk prediction is a challenging task due to minute variations in the amplitude, duration and morphology of the ECG signal. In this paper, we propose two feature extraction approaches to classify five types of heartbeats: normal, premature ventricular contraction, atrial premature contraction, left bundle branch block and right bundle branch block. In the first approach, ECG beats are decomposed into intrinsic mode functions (IMFs) using ensemble empirical mode decomposition (EEMD)...
June 15, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28609503/the-effect-of-enamel-matrix-derivative-alone-versus-in-combination-with-alloplastic-materials-to-treat-intrabony-defects-a-meta-analysis
#3
Yang Liu, Bo Hu, Jingli Zhou, Wenyang Li, Qin Liu, Jinlin Song
This meta-analysis aims to compare the effect of the application of enamel matrix derivative (EMD) used alone with that of its use in combination with alloplastic materials in the treatment of periodontal intrabony defects. Relevant studies were retrieved from PubMed, the Cochrane Library, and Embase through November 2015. The main clinical outcomes were pocket probing depth (PPD) reduction, clinical attachment level (CAL) gain, gingival recession (REC) increase, and defect fill gain. Two separate meta-analyses were performed according to the length of follow-up...
July 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28603465/spinal-cord-as-an-adjunct-to-brain-magnetic-resonance-imaging-in-defining-no-evidence-of-disease-activity-in-multiple-sclerosis
#4
Subhash Tummala, Tarun Singhal, Vinit V Oommen, Gloria Kim, Fariha Khalid, Brian C Healy, Rohit Bakshi
ACTIVITY AVAILABLE ONLINE: To access the article, post-test, and evaluation online, go to http://www.cmscscholar.org. TARGET AUDIENCE: The target audience for this activity is physicians, physician assistants, nursing professionals, and other health-care providers involved in the management of patients with multiple sclerosis (MS). LEARNING OBJECTIVES: 1) Describe the concept of "no evidence of disease activity" in MS.2) Recognize the role of spinal cord imaging in routine monitoring of MS disease activity...
May 2017: International Journal of MS Care
https://www.readbyqxmd.com/read/28598248/enamel-matrix-derivative-enhances-the-proliferation-and-osteogenic-differentiation-of-human-periodontal-ligament-stem-cells-on-the-titanium-implant-surface
#5
Guang Li, Jing Hu, Hui Chen, Liang Chen, Na Zhang, Lisheng Zhao, Ning Wen, Yongjin Yang
Periodontal ligament stem cells (PDLSCs) have mesenchymal-stem-cells-like qualities, and are considered as one of the candidates of future clinical application in periodontal regeneration therapy. Enamel matrix derivative (EMD) is widely used in promoting periodontal regeneration. However, the effects of EMD on the proliferation and osteogenic differentiation of human PDLSCs grown on the Ti implant surface are still no clear. Therefore, this study examined the effects of EMD on human PDLSCs in vitro. Human PDLSCs were isolated from healthy participants, and seeded on the surface of Ti implant disks and stimulated with various concentrations of EMD...
June 9, 2017: Organogenesis
https://www.readbyqxmd.com/read/28594907/gastrointestinal-cancer-cells-treatment-with-bevacizumab-activates-a-vegf-autoregulatory-mechanism-involving-telomerase-catalytic-subunit-htert-via-pi3k-akt-hif-1%C3%AE-and-vegf-receptors
#6
Nadine Mahfouz, Roula Tahtouh, Nada Alaaeddine, Joelle El Hajj, Riad Sarkis, Ray Hachem, Issam Raad, George Hilal
BACKGROUND: Targeting angiogenesis has been considered a promising treatment of choice for a large number of malignancies, including gastrointestinal cancers. Bevacizumab is an anti-vascular endothelial growth factor (anti-VEGF) being used for this purpose. However, treatment efficacy is largely questioned. Telomerase activity, responsible for cancer cell immortality, is detected in 85-95% of human cancers and is considered a potential regulator of VEGF. The aim of our study was to investigate the interrelationship between VEGF and hTERT in gastrointestinal cancers and to explore cell response to a combined inhibition of telomerase and VEGF...
2017: PloS One
https://www.readbyqxmd.com/read/28576971/substrate-stiffness-dependent-regulation-of-srf-mkl1-requires-the-inner-nuclear-membrane-protein-emerin
#7
Margaret K Willer, Christopher W Carroll
The SRF/Mkl1 transcription factor/co-activator complex promotes myofibroblast differentiation during wound healing. SRF/Mkl1 is sensitive to the mechanical properties of the extracellular environment, but how cells sense and transduce mechanical cues to modulate SRF/Mkl1-dependent gene expression is not well understood. Here, we demonstrate that the nuclear lamina-associated inner nuclear membrane protein Emerin stimulates SRF/Mkl1-dependent gene activity in a substrate stiffness-dependent manner. Specifically, Emerin was required for Mkl1 nuclear accumulation and maximal SRF/Mkl1-dependent gene expression in response to serum stimulation on stiff substrates but was dispensable on more compliant substrates...
June 2, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28576589/early-changes-in-atrial-conduction-times-in-hypertensive-patients-with-elevated-pulse-pressure
#8
Tolga Çimen, Hamza Sunman, Tolga Han Efe, Ahmet Akyel, Kadriye Yayla, Haluk Furkan Şahan, Murat Bilgin, Lale Dinç Asarcıklı, Ali Nallbani, Mehmet Doğan, Sadık Açıkel, Ekrem Yeter
OBJECTIVE: Pulse pressure (PP) is the difference between systolic and diastolic blood pressure, and is an independent predictor of atrial fibrillation (AF). In this study we investigated the relationship between PP and atrial conduction times. METHODS: The study included 157 patients with essential hypertension. PP of 60 mmHg or more was regarded as elevated (n=56). Atrial electromechanical delay (EMD) was assessed with tissue Doppler echocardiography and P-wave dispersion (Pd) was calculated from the electrocardiogram...
May 30, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28566669/effect-of-enamel-matrix-derivative-on-the-angiogenic-behaviors-of-human-umbilical-vein-endothelial-cells-on-different-titanium-surfaces
#9
Bin Shi, Oleh Andrukhov, Burcu Özdemir, Hassan Ali Shokoohi Tabrizi, Michel Dard, Xiaohui Rausch-Fan
Angiogenesis play a crucial role in the regeneration of hard and soft tissue around dental titanium (Ti) implant. Enamel matrix derivative (EMD) promotes tissue regeneration and stimulates angiogenesis but its effect on the angiogenesis on Ti surfaces was never investigated. The effect of EMD on the angiogenic activity of endothelial cells cultured on pre-treated smooth Ti (PT), acidetched (A), coarse-grit blasted and acid-etched (SLA) surfaces and tissue culture plastic (TCP) in the presence or absence of EMD was investigated...
May 30, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28556258/extramedullary-disease-at-diagnosis-of-aml-does-not-influence-outcome-of-patients-undergoing-allogeneic-hematopoietic-cell-transplant-in-cr1
#10
Christianne Bourlon, Jeffrey H Lipton, Uday Deotare, Vikas Gupta, Dennis D Kim, John Kuruvilla, Auro Viswabandya, Santhosh Thyagu, Hans A Messner, Fotios V Michelis
OBJECTIVE: Extramedullary disease (EMD) at diagnosis of acute myeloid leukemia (AML) has been associated with increased risk of relapse and worse outcomes post-chemotherapy. The present study sought to investigate the association of EMD with outcomes following allogeneic hematopoietic cell transplantation (allo-HCT). METHOD: This single-center retrospective study investigated the impact of EMD at diagnosis on the outcome of patients transplanted for AML in first complete remission (CR1)...
May 27, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28555426/a-novel-approach-to-the-extraction-of-fetal-electrocardiogram-based-on-empirical-mode-decomposition-and-correlation-analysis
#11
Peyman Ghobadi Azbari, Mostafa Abdolghaffar, Saeed Mohaqeqi, Mohammad Pooyan, Alireza Ahmadian, Niloofar Ghanbarzadeh Gashti
Fetal heart rate monitoring is the process of checking the condition of the fetus during pregnancy and it would allow doctors and nurses to detect early signs of trouble during labor and delivery. The fetal ECG (FECG) signal is so weak and also is corrupted by other signals and noises, mainly by maternal ECG signal. It is so hard to acquire a noise-free, precise and reliable FECG using the conventional methods. In this study, a combination of empirical mode decomposition (EMD) algorithms, correlation and match filtering is used for extracting FECG from maternal abdominal ECG signals...
May 29, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28555017/electrolytic-manganese-dioxide-coatings-on-high-aspect-ratio-micro-pillar-arrays-for-3d-thin-film-lithium-ion-batteries
#12
Yafa Zargouni, Stella Deheryan, Alex Radisic, Khaled Alouani, Philippe M Vereecken
In this work, we present the electrochemical deposition of manganese dioxide (MnO₂) thin films on carbon-coated TiN/Si micro-pillars. The carbon buffer layer, grown by plasma enhanced chemical vapor deposition (PECVD), is used as a protective coating for the underlying TiN current collector from oxidation, during the film deposition, while improving the electrical conductivity of the stack. A conformal electrolytic MnO₂ (EMD) coating is successfully achieved on high aspect ratio C/TiN/Si pillar arrays by tailoring the deposition process...
May 27, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28552120/benchmarking-of-a-t-wave-alternans-detection-method-based-on-empirical-mode-decomposition
#13
Manuel Blanco-Velasco, Rebeca Goya-Esteban, Fernando Cruz-Roldán, Arcadi García-Alberola, José Luis Rojo-Álvarez
BACKGROUND AND OBJECTIVE: T-wave alternans (TWA) is a fluctuation of the ST-T complex occurring on an every-other-beat basis of the surface electrocardiogram (ECG). It has been shown to be an informative risk stratifier for sudden cardiac death, though the lack of gold standard to benchmark detection methods has promoted the use of synthetic signals. This work proposes a novel signal model to study the performance of a TWA detection. Additionally, the methodological validation of a denoising technique based on empirical mode decomposition (EMD), which is used here along with the spectral method, is also tackled...
July 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28552114/an-integrated-blood-pressure-measurement-system-for-suppression-of-motion-artifacts
#14
Huthaifa N Abderahman, Hilmi R Dajani, Miodrag Bolic, Voicu Z Groza
Accuracy in blood pressure (BP) estimation is essential for proper diagnosis and management of hypertension. Motion artifacts are considered external sources of inaccuracy and can be due to sudden arm motion, muscle tremor, shivering, and transport vehicle vibrations. In the proposed work, a new algorithmic stage is integrated in a non-invasive BP monitor. This stage suppresses the effect of the motion artifact and adjusts the pressure estimation before displaying it to users. The proposed stage is based on a 3-axis accelerometer signal, which helps in the accurate detection of the motion artifact...
July 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28533614/the-effect-of-bridge-exercise-method-on-the-strength-of-rectus-abdominis-muscle-and-the-muscle-activity-of-paraspinal-muscles-while-doing-treadmill-walking-with-high-heels
#15
Taewook Kang, Jaeseok Lee, Junghoon Seo, Dongwook Han
[Purpose] The purpose of this research is to investigate the effect of the method of bridge exercise on the change of rectus abdominis muscle and the muscle activity of paraspinal muscles while doing treadmill walking with high heels. [Subjects and Methods] The subjects of this research are healthy female students consisting of 10 persons performing bridge exercises in a supine group, 10 persons performing bridge exercises in a prone group, and 10 persons in a control group while in S university in Busan. Bridge exercise in supine position is performed in hook lying position...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28531879/scaffold-requirements-for-periodontal-regeneration-with-enamel-matrix-derivative-proteins
#16
Alessandra Apicella, Peggy Heunemann, Laurent Dejace, Matteo Marascio, Christopher J G Plummer, Peter Fischer
Periodontitis affects the attachment of natural teeth, and infection or inflammation associated with periodontitis may affect peri-implant tissues. Enamel matrix derivative (EMD) proteins provide stimulation for self-regeneration of the damaged tissue when applied to wide intrabony defects as part of a mixture with bone graft material. As a first step of the process enhancing cell proliferation and ligament formation, we demonstrated that EMD protein precipitation depends strongly on the physical and chemical characteristics of the bone grafts used in the mixture...
May 9, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28530525/cost-effectiveness-of-nivolumab-ipilimumab-combination-therapy-compared-with-monotherapy-for-first-line-treatment-of-metastatic-melanoma-in-the-united-states
#17
Anna Oh, Dang M Tran, Leann C McDowell, Dor Keyvani, Jay Andrew Barcelon, Oscar Merino, Leslie Wilson
BACKGROUND: The approval of new immunotherapies has dramatically changed the treatment landscape of metastatic melanoma. These survival gains come with trade-offs in side effects and costs, as well as important considerations for third-party payer systems, physicians, and patients. OBJECTIVE: To develop a Markov model to determine the cost-effectiveness of nivolumab, ipilimumab, and nivolumab-ipilimumab combination as firstline therapy in metastatic melanoma, while accounting for differential effectiveness in programmed death-ligand 1 (PD-L1) positive and negative patients...
June 2017: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/28529760/denoising-techniques-in-adaptive-multi-resolution-domains-with-applications-to-biomedical-images
#18
Salim Lahmiri
Variational mode decomposition (VMD) is a new adaptive multi-resolution technique suitable for signal denoising purpose. The main focus of this work has been to study the feasibility of several image denoising techniques in empirical mode decomposition (EMD) and VMD domains. A comparative study is made using 11 techniques widely used in the literature, including Wiener filter, first-order local statistics, fourth partial differential equation, nonlinear complex diffusion process, linear complex diffusion process (LCDP), probabilistic non-local means, non-local Euclidean medians, non-local means, non-local patch regression, discrete wavelet transform and wavelet packet transform...
February 2017: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28529759/high-frequency-based-features-for-low-and-high-retina-haemorrhage-classification
#19
Salim Lahmiri
Haemorrhages (HAs) presence in fundus images is one of the most important indicators of diabetic retinopathy that causes blindness. In this regard, accurate grading of HAs in fundus images is crucial for appropriate medical treatment. The purpose of this Letter is to assess the relative performance of statistical features obtained with three different multi-resolution analysis (MRA) techniques and fed to support vector machine in grading retinal HAs. Considered MRA techniques are the common discrete wavelet transform (DWT), empirical mode decomposition (EMD), and variational mode decomposition (VMD)...
February 2017: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28504702/pgbd5-promotes-site-specific-oncogenic-mutations-in-human-tumors
#20
Anton G Henssen, Richard Koche, Jiali Zhuang, Eileen Jiang, Casie Reed, Amy Eisenberg, Eric Still, Ian C MacArthur, Elias Rodríguez-Fos, Santiago Gonzalez, Montserrat Puiggròs, Andrew N Blackford, Christopher E Mason, Elisa de Stanchina, Mithat Gönen, Anne-Katrin Emde, Minita Shah, Kanika Arora, Catherine Reeves, Nicholas D Socci, Elizabeth Perlman, Cristina R Antonescu, Charles W M Roberts, Hanno Steen, Elizabeth Mullen, Stephen P Jackson, David Torrents, Zhiping Weng, Scott A Armstrong, Alex Kentsis
Genomic rearrangements are a hallmark of human cancers. Here, we identify the piggyBac transposable element derived 5 (PGBD5) gene as encoding an active DNA transposase expressed in the majority of childhood solid tumors, including lethal rhabdoid tumors. Using assembly-based whole-genome DNA sequencing, we found previously undefined genomic rearrangements in human rhabdoid tumors. These rearrangements involved PGBD5-specific signal (PSS) sequences at their breakpoints and recurrently inactivated tumor-suppressor genes...
May 15, 2017: Nature Genetics
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