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https://www.readbyqxmd.com/read/28539541/sleep-disordered-breathing-in-heart-failure%C3%A3-a-therapeutic-dilemma
#1
Nobuhiko Haruki, John S Floras
Sleep-disordered breathing (SDB) occurs in approximately 50% of patients with reduced left ventricular ejection fraction receiving contemporary heart failure (HF) therapies. Obstructive (OSA) and central sleep apneas (CSA) interrupt breathing by different mechanisms but impose qualitatively similar autonomic, chemical, mechanical, and inflammatory burdens on the heart and circulation. Because contemporary evidence-based drug and device HF therapies have little or no mitigating effect on the acute or long-term consequences of such stimuli, there is a sound mechanistic rationale for targeting SDB to reduce cardiovascular event rates and prolong life...
May 23, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28536474/gcn2-phosphorylates-hiv-1-integrase-and-decreases-hiv-1-replication-by-limiting-viral-integration
#2
A Jaspart, C Calmels, O Cosnefroy, P Bellecave, P Pinson, S Claverol, V Guyonnet-Dupérat, B Dartigues, M S Benleulmi, E Mauro, P A Gretteau, V Parissi, M Métifiot, M L Andreola
GCN2 is a serine/threonine kinase involved in cellular stress response related to amino acid starvation. Previously, we showed that GCN2 interacts with HIV-1 integrase and is activated during HIV-1 infection. Herein, we identified HIV-1 integrase as a previously unknown substrate of GCN2 in vitro with a major site of phosphorylation at residue S255 located in the C-terminal domain of HIV-1 integrase. The underlying mechanism was investigated and it appeared that the integrase active site was required in order for GCN2 to target the integrase residue S255...
May 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28531970/ultrasensitive-cholesterol-biosensor-based-on-enzymatic-silver-deposition-on-gold-nanoparticles-modified-screen-printed-carbon-electrode
#3
Yong Huang, Lijie Cui, Yewei Xue, Songbai Zhang, Nixuan Zhu, Jintao Liang, Guiyin Li
Cholesterol is one of the essential structural constituents of cell membranes. Determination of cholesterol is of great importance in clinical analysis because the level of cholesterol in serum is an indicator in the diagnosis and prevention of heart diseases. In this work, a simple and ultrasensitive cholesterol biosensor based on enzymatic silver deposition was designed by immobilizing cholesterol oxidase (CHOD) and cholesterol esterase (CHER) onto the surface of gold nanoparticles (Au NPs) modified screen-printed carbon electrode (SPE)...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28484123/adaptive-servo-ventilation-treatment-increases-stroke-volume-in-stable-systolic-heart-failure-patients-with-low-tricuspid-annular-plane-systolic-excursion
#4
Toshihiro Iwasaku, Tomotaka Ando, Akiyo Eguchi, Yoshitaka Okuhara, Yoshiro Naito, Toshiaki Mano, Tohru Masuyama, Shinichi Hirotani
We hypothesized that the effects of adaptive servo-ventilation (ASV) therapy were influenced by right-sided heart performance. This study aimed to clarify the interaction between the effects of ASV and right-sided heart performance in patients with stable heart failure (HF) with reduced ejection fraction (HFrEF).Twenty-six stable HF inpatients (left ventricular ejection fraction < 0.45, without moderate to severe mitral regurgitation (MR) were analyzed. Echocardiography was performed before and after 30 minutes of ASV...
May 8, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28467359/long-term-follow-up-of-resistance-associated-substitutions-in-hepatitis-c-virus-in-patients-in-which-direct-acting-antiviral-based-therapy-failed
#5
Kanako Yoshida, Hoang Hai, Akihiro Tamori, Yuga Teranishi, Ritsuzo Kozuka, Hiroyuki Motoyama, Etsushi Kawamura, Atsushi Hagihara, Sawako Uchida-Kobayashi, Hiroyasu Morikawa, Masaru Enomoto, Yoshiki Murakami, Norifumi Kawada
We evaluated the transition of dominant resistance-associated substitutions (RASs) in hepatitis C virus during long-term follow-up after the failure of DAAs (direct acting antivirals)-based therapy. RASs in non-structure (NS)3/4A, NS5A, NS5B, and deletions in NS5A from 20 patients who failed simeprevir/pegylated-interferon/ribavirin (SMV/PEG-IFN/RBV) and 25 patients who failed daclatasvir/asunaprevir (DCV/ASV) treatment were examined by direct sequencing. With respect to SMV/PEG-IFN/RBV treatment, RAS was detected at D168 in NS3/4A but not detected in NS5A and NS5B at treatment failure in 16 of 20 patients...
May 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28458864/long-segment-hypoplasia-of-great-saphenous-vein-with-posterior-accessory-saphenous-vein-as-a-connecting-vein-a-case-report
#6
Byung Seo Choi, Geon Young Byun, Seong Bae Hwang, Bum Hwan Koo, Sung Ryul Lee
Aplasia or hypoplasia of great saphenous vein (GSV) is relatively common. Most of them are segmental and localized around the knee. They rarely extend to the inguinal area, yet in case of this, the anterior accessory saphenous vein (AASV) is the most common connecting vein. We report a case of a 22-year-old male who underwent surgery for pain and heaviness of the right calf. He had the hypoplasia of right GSV extended from below the popliteal crease to near the saphenofemoral junction with posterior ASV (PASV) as a connecting vein...
March 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28457128/matrix-extension-and-multilaboratory-validation-of-arsenic-speciation-method-eam-%C3%A2-4-10-to-include-wine
#7
Courtney K Tanabe, Helene Hopfer, Susan E Ebeler, Jenny Nelson, Sean D Conklin, Kevin M Kubachka, Robert A Wilson
A multilaboratory validation (MLV) was performed to extend the U.S. Food and Drug Administration's (FDA) analytical method Elemental Analysis Manual (EAM) §4.10, High Performance Liquid Chromatography-Inductively Coupled Plasma-Mass Spectrometric Determination of Four Arsenic Species in Fruit Juice, to include wine. Several method modifications were examined to optimize the method for the analysis of dimethylarsinic acid, monomethylarsonic acid, arsenate (AsV), and arsenite (AsIII) in various wine matrices with a range of ethanol concentrations by liquid chromatography-inductively coupled plasma-mass spectrometry...
May 11, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28440885/a-comparison-of-direct-sequencing-and-invader-assay-for-y93h-mutation-and-response-to-interferon-free-therapy-in-hepatitis-c-virus-genotype-1b
#8
Kazuhiko Hayashi, Masatoshi Ishigami, Yoji Ishizu, Teiji Kuzuya, Takashi Honda, Hiroki Kawashima, Tetsuya Ishikawa, Yoshihiko Tachi, Masashi Hattori, Yoshiaki Katano, Hidemi Goto, Yoshiki Hirooka
BACKGROUND AND AIM: Virologic failure of interferon (IFN)-free therapy has been associated with Y93H mutation in the NS5A region in hepatitis C virus (HCV) genotype 1b, and screening is recommended. A simple assay based on Q-Invader technology was developed for Y93H mutant screening to reduce cost and effort. The present study sought to compare two methods of detection of Y93H mutation and to evaluate the effect of Y93H mutation on response to IFN free therapy. METHODS: Y93H mutation was examined in 258 patients with HCV genotype 1b using both direct sequencing analysis and the PCR-Invader assay...
April 25, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28428715/impact-of-interferon-free-antivirus-therapy-on-lipid-profiles-in-patients-with-chronic-hepatitis-c-genotype-1b
#9
Daisuke Endo, Kenichi Satoh, Noritomo Shimada, Atsushi Hokari, Yoshio Aizawa
AIM: To investigate the influence of interferon-free antivirus therapy on lipid profiles in chronic hepatitis C virus genotype 1b (HCV1b) infection. METHODS: Interferon-free antiviral agents were used to treat 276 patients with chronic HCV1b infection, and changes in serum lipids of those who achieved sustained virologic response (SVR) were examined. The treatment regimen included 24 wk of daclatasvir plus asunaprevir (DCV + ASV) or 12 wk of sofosbuvir plus ledipasvir (SOF + LDV)...
April 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28419958/arsenate-and-fluoride-enhanced-each-other-s-uptake-in-as-sensitive-plant-pteris-ensiformis
#10
Suchismita Das, Letuzia M de Oliveira, Evandro da Silva, Lena Q Ma
We investigated the effects of arsenate (AsV) and fluoride (F) on each other's uptake in an As-sensitive plant Pteris ensiformis. Plants were exposed to 1) 0.1 × Hoagland solution control, 2) 3.75 mg L(-1) As and 1.9, 3.8, or 7.6 mg L(-1) F, or 3) 1 mg L(-1) F and 3.75 mg L(-1) or 7.5 mg L(-1) As for 7 d in hydroponics. P. ensiformis accumulated 14.7-32.6 mg kg(-1) As at 3.75 mg L(-1) AsV, and 99-145 mg kg(-1) F at 1 mg L(-1) F. Our study revealed that AsV and F increased each other's uptake when co-present...
April 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28417254/whom-are-we-treating-with-adaptive-servo-ventilation-a-clinical-post-hoc-analysis
#11
Maximilian V Malfertheiner, C Lerzer, L Kolb, K Heider, F Zeman, F Gfüllner, L S Maier, M Pfeifer, M Arzt
BACKGROUND: Recent evidence has shown that adaptive servo-ventilation (ASV) is contraindicated in patients with predominant central sleep apnea (CSA) and reduced left ventricular ejection fraction (LVEF ≤45%). The objective of this study was to assess the clinical usage of ASV in patients at the time-point of the release of a safety warning by type of SDB, breathing pattern and LVEF. METHODS: Patients of a cardiac and a respirology sleep center, both in Germany, who received ASV therapy were contacted between May and October 2015...
April 17, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28393530/a-new-electrochemical-system-based-on-a-flow-field-shaped-solid-electrode-and-3d-printed-thin-layer-flow-cell-detection-of-pb-2-ions-by-continuous-flow-accumulation-square-wave-anodic-stripping-voltammetry
#12
Qianwen Sun, Jikui Wang, Meihua Tang, Liming Huang, Zhiyi Zhang, Chang Liu, Xiaohua Lu, Kenneth W Hunter, Guosong Chen
Here we describe a new and sensitive flow electrochemical detection system that employs a novel flow-field shaped solid electrode (FFSSE). The system was constructed with a 3D-printed thin-layer flow cell (TLFC) and a flat screen-printed FFSSE with USB connection. This interface facilitates continuous flow accumulation square-wave anodic stripping voltammetry (ASV). The flow distribution in the working space of TLFC was simulated using the finite element method (FEM) and the shape and configuration of electrodes were optimized accordingly...
April 13, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28391734/analysis-of-tracheostoma-morphology
#13
Maartje Leemans, Maarten J A van Alphen, Michiel W M van den Brekel, Edsko E G Hekman
OBJECTIVES: Existing fixation methods of automatic speaking valves (ASVs) suffer from shortcomings which partly are the result of insufficient conformity of the intratracheal fixation method's shape to the tracheostoma anatomy. However, quantitative data are lacking and will be helpful to analyse solutions for airtight fixation. This article provides such data. PATIENTS AND METHODS: The tracheostoma morphology was measured in computerized tomography scans of 20 laryngectomized patients...
April 10, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28390743/adaptive-servo-ventilation-therapy-reduces-hospitalization-rate-in-patients-with-severe-heart-failure
#14
Masayoshi Yoshida, Shin-Ichi Ando, Kazuhisa Kodama, Kie Ebihara, Kaoru Tanaka, Atsumi Hayashi, Eiji Taguchi, Toshiaki Kadokami, Kouichi Nakao, Tomohiro Sakamoto
INTRODUCTION: Adaptive servo-ventilation (ASV) therapy is a recently developed non-pharmacological therapy that has been reported to improve cardiac function and survival in patients with severe congestive heart failure (CHF). However, a recent large randomized study suggested that ASV does not improve survival in patients with reduced ejection fraction. It remains unclear whether ASV treatment can reduce the hospitalization rate of CHF patients. We thus examined the frequency of hospital admission before and after initiation of ASV therapy in patients with CHF...
February 22, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28377920/automated-weaning-from-mechanical-ventilation-after-off-pump-coronary-artery-bypass-grafting
#15
Evgenia V Fot, Natalia N Izotova, Angelika S Yudina, Aleksei A Smetkin, Vsevolod V Kuzkov, Mikhail Y Kirov
BACKGROUND: The discontinuation of mechanical ventilation after coronary surgery may prolong and significantly increase the load on intensive care unit personnel. We hypothesized that automated mode using INTELLiVENT-ASV can decrease duration of postoperative mechanical ventilation, reduce workload on medical staff, and provide safe ventilation after off-pump coronary artery bypass grafting (OPCAB). The primary endpoint of our study was to assess the duration of postoperative mechanical ventilation during different modes of weaning from respiratory support (RS) after OPCAB...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28371141/design-of-the-effect-of-adaptive-servo-ventilation-on-survival-and-cardiovascular-hospital-admissions-in-patients-with-heart-failure-and-sleep-apnoea-the-advent-hf-trial
#16
Owen D Lyons, John S Floras, Alexander G Logan, Robert Beanlands, Joaquin Durán Cantolla, Michael Fitzpatrick, John Fleetham, R John Kimoff, Richard S T Leung, Geraldo Lorenzi Filho, Pierre Mayer, Lisa Mielniczuk, Debra L Morrison, Clodagh M Ryan, Frederic Series, George A Tomlinson, Anna Woo, Michael Arzt, Sairam Parthasarathy, Stefania Redolfi, Takatoshi Kasai, Gianfranco Parati, Diego H Delgado, T Douglas Bradley
INTRODUCTION: Both types of sleep-disordered breathing (SDB), obstructive and central sleep apnoea (OSA and CSA, respectively), are common in patients with heart failure and reduced ejection fraction (HFrEF). In such patients, SDB is associated with increased cardiovascular morbidity and mortality but it remains uncertain whether treating SDB by adaptive servo-ventilation (ASV) in such patients reduces morbidity and mortality. AIM: ADVENT-HF is designed to assess the effects of treating SDB with ASV on morbidity and mortality in patients with HFrEF...
April 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28366779/withdrawing-asv-therapy-in-clinical-practice-trials-and-tribulations
#17
EDITORIAL
Martin R Cowie
No abstract text is available yet for this article.
March 9, 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28361915/evolution-of-multi-drug-resistant-hcv-clones-from-pre-existing-resistant-associated-variants-during-direct-acting-antiviral-therapy-determined-by-third-generation-sequencing
#18
Haruhiko Takeda, Yoshihide Ueda, Tadashi Inuzuka, Yukitaka Yamashita, Yukio Osaki, Akihiro Nasu, Makoto Umeda, Ryo Takemura, Hiroshi Seno, Akihiro Sekine, Hiroyuki Marusawa
Resistance-associated variant (RAV) is one of the most significant clinical challenges in treating HCV-infected patients with direct-acting antivirals (DAAs). We investigated the viral dynamics in patients receiving DAAs using third-generation sequencing technology. Among 283 patients with genotype-1b HCV receiving daclatasvir + asunaprevir (DCV/ASV), 32 (11.3%) failed to achieve sustained virological response (SVR). Conventional ultra-deep sequencing of HCV genome was performed in 104 patients (32 non-SVR, 72 SVR), and detected representative RAVs in all non-SVR patients at baseline, including Y93H in 28 (87...
March 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28361831/evolving-management-of-insulinoma-experience-at-a-tertiary-care-centre
#19
Viveka P Jyotsna, Sujoy Pal, D Kandasamy, S Gamanagatti, P K Garg, N Raizada, Peush Sahni, C S Bal, N Tandon, A C Ammini
BACKGROUND & OBJECTIVES: Since our previous study in 2006, several new modalities for localization of cause of endogenous hyperinsulinemic hypoglycaemia such as multiphasic computed tomography (CT), multiphasic magnetic resonance imaging (MRI), endoscopic ultrasound (EUS), intraoperative ultrasound, and intra-arterial calcium infusion with arterial stimulation venous sampling (ASVS) have become available. Therefore, to evaluate the relative usefulness of various imaging modalities to guide future management in terms of diagnosis and patient care, we analyzed presentation and management of patients of endogenous hyperinsulinemic hypoglycaemia...
November 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28356063/daclatasvir-asunaprevir-based-direct-acting-antiviral-therapy-ameliorate-hepatitis-c-virus-associated-cryoglobulinemic-membranoproliferative-glomerulonephritis-a-case-report
#20
Michiko Shimada, Norio Nakamura, Tetsu Endo, Hideaki Yamabe, Masayuki Nakamura, Reiichi Murakami, Ikuyo Narita, Hirofumi Tomita
BACKGROUND: Direct-acting antivirals (DAAs) dramatically improve the treatment of hepatitis C virus (HCV) infections. However, the effects of DAAs on extra-hepatic manifestations such as HCV-associated glomerulonephritis, especially in cases with renal dysfunction, are not well elucidated. CASE PRESENTATION: A 69-year-old Japanese woman was diagnosed as having chronic hepatitis C, genotype 1b at the age of 55. She presented with hypertension, microscopic hematuria, proteinuria, renal dysfunction, purpura, and arthralgia at the age of 61...
March 29, 2017: BMC Nephrology
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