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https://www.readbyqxmd.com/read/29352977/paclitaxel-inhibited-lysozyme-fibrillation-by-increasing-colloidal-stability-through-formation-of-off-pathway-oligomers
#1
Ehsan Kachooei, Faroogh Mozaffarian, Fariba Khodagholi, Payam Sedeghi, Leila Karami, Atiyeh Ghasemi, Elham Vahdat, Ali Akbar Saboury, Nader Sheibani, Ali Akbar Moosavi-Movahedi
Protein fibrillation is a challenging issue in medicine, causing many diseases, and an impediment to pharmaceutics and protein industry. Many chemicals, especially polyphenol compounds and aromatic small molecules, have been widely used as an effective strategy to combat protein fibril formation. Hence, understanding mechanisms of fibrillation inhibition and contributing forces in this process are significant. In this study, the inhibitory effect of paclitaxel on lysozyme fibrillation was investigated with respect to thermal and colloidal stability...
January 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29352963/three-dimensional-visualization-of-extracellular-matrix-networks-during-murine-development
#2
Andrea Acuna, Michael A Drakopoulos, Yue Leng, Craig J Goergen, Sarah Calve
The extracellular matrix (ECM) plays a crucial role in embryogenesis, serving both as a substrate to which cells attach and as an active regulator of cell behavior. However, little is known about the spatiotemporal expression patterns and 3D structure of ECM proteins during embryonic development. The lack of suitable methods to visualize the embryonic ECM is largely responsible for this gap, posing a major technical challenge for biologists and tissue engineers. Here, we describe a method of viewing the 3D organization of the ECM using a polyacrylamide-based hydrogel to provide a 3D framework within developing murine embryos...
January 15, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29352924/producing-nanofibres-from-carrots-with-a-chemical-free-process
#3
Swambabu Varanasi, Leeav Henzel, Scot Sharman, Warren Batchelor, Gil Garnier
The production of nanofibres (NF) from fresh carrots residue was investigated with a mechanical process without using any pulping or bleaching chemicals. Refining with a PFI mill followed by mechanical fibrillation with a homogenizer was used to produce fine NF. Blanching with hot water was carried out to leach the extractives from carrot fibres prior to refining. The energy required to prepare carrot pulp is one order of magnitude lower than for wood pulp and the fibrillation of nanofibres from carrot residue is four times lower in energy than using wood pulp as feedstock...
March 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352870/radiation-grafting-a-voyage-from-bio-waste-corn-husk-to-an-efficient-thermostable-adsorbent
#4
Jhimli Paul Guin, Y K Bhardwaj, Lalit Varshney
The initiator free environmentally benign gamma radiation is employed to graft poly-acrylic acid (PAA) onto the widely produced bio-waste corn husk to develop promising, cheap, efficient and reusable adsorbent (AAc-g-husk) having specific adsorption capacity of 1682.7mgg-1 of methylene blue (MB) at pH 9.0 and 320K. The most suitable grafting yield is found by optimizing absorbed dose, dose rate and concentrations of monomer, Mohr's salt and inorganic acid. The inter-planar hydrogen bonding among (002) planes of cellulose in the husk decreases after diversifying grafting of PAA on ad-axial, ribs and micro-fibrils surfaces of the corn husks...
March 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29352566/in-hospital-cerebrovascular-outcomes-of-patients-with-atrial-fibrillation-and-cancer-from-the-national-inpatient-sample-database
#5
Ayman Elbadawi, Islam Y Elgendy, Le Dung Ha, Basarat Baig, Marwan Saad, Hussain Adly, Gbolahan O Ogunbayo, Odunayo Olorunfemi, Matthew S Mckillop, Scott A Maffett
Limited data are available regarding the impact of cancer on cerebrovascular accidents in patients with atrial fibrillation (AF). We queried the Nationwide Inpatient Survey Database to identify patients who have diagnostic code for AF. We performed a 1:1 propensity matching based on the CHA2DS2VASc score and other risk factors between patients with AF who had lung, breast, colon, and esophageal cancer, and those who did not (control). The final cohort included a total of 31,604 patients. The primary outcome of in-hospital cerebrovascular accidents (CVA) was lower in the cancer group than in the control group (4% vs 7%, p < 0...
December 20, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29352483/epidermal-aspects-of-type-vii-collagen-implications-for-dystrophic-epidermolysis-bullosa-and-epidermolysis-bullosa-acquisita
#6
REVIEW
Mika Watanabe, Ken Natsuga, Satoru Shinkuma, Hiroshi Shimizu
Type VII collagen (COL7), a major component of anchoring fibrils in the epidermal basement membrane zone, has been characterized as a defective protein in dystrophic epidermolysis bullosa and as an autoantigen in epidermolysis bullosa acquisita. Although COL7 is produced and secreted by both epidermal keratinocytes and dermal fibroblasts, the role of COL7 with regard to the epidermis is rarely discussed. This review focuses on COL7 physiology and pathology as it pertains to epidermal keratinocytes. We summarize the current knowledge of COL7 production and trafficking, its involvement in keratinocyte dynamics, and epidermal carcinogenesis in COL7 deficiency and propose possible solutions to unsolved issues in this field...
January 20, 2018: Journal of Dermatology
https://www.readbyqxmd.com/read/29352054/increased-blood-brain-barrier-permeability-in-contralateral-hemisphere-predicts-worse-outcome-in-acute-ischemic-stroke-after-reperfusion-therapy
#7
Chang Liu, Shenqiang Yan, Ruiting Zhang, Zhicai Chen, Feina Shi, Ying Zhou, Meixia Zhang, Min Lou
AIMS: We sought to investigate the risk factors of blood-brain barrier (BBB) disruption, and its potential impact on 90-day clinical outcome in acute ischemic stroke (AIS) patients after reperfusion therapy. METHODS: Consecutive acute anterior circulation AIS patients imaged with computed tomographic perfusion (CTP) before reperfusion therapy were included. Tmax >6 s was used for the volumetric measurement of the hypoperfusion area. BBB permeability (BBBP) was calculated as the average relative permeability-surface area product (rPS) within the hypoperfusion region (rPShypo-i) and its contralateral mirror region (rPShypo-c) on CTP-derived PS color maps...
January 19, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29352041/stress-signaling-jnk2-crosstalk-with-camkii-underlies-enhanced-atrial-arrhythmogenesis
#8
Jiajie Yan, Weiwei Zhao, Justin K Thomson, Xianlong Gao, Dominic M DeMarco, Elena Carrillo, Biyi Chen, Xiaomin Wu, Kenneth S Ginsburg, Mamdouh Bakhos, Donald M Bers, Mark E Anderson, Long-Sheng Song, Michael Fill, Xun Ai
Rationale: Atrial fibrillation (AF) is the most common arrhythmia and advanced age is an inevitable and predominant AF risk factor. However, the mechanisms that couple aging and AF propensity remain unclear, making targeted therapeutic interventions unattainable. Objective: To explore the functional role of an important stress-response c-Jun N-terminal kinase (JNK) in sarcoplasmic reticulum (SR) Ca2+ handling and consequently Ca2+-mediated atrial arrhythmias. Methods and Results: We employed a series of cutting-edge electrophysiological and molecular techniques, exploited the power of transgenic mouse models to detail the molecular mechanism, and verified its clinical applicability in parallel studies on donor human hearts...
January 19, 2018: Circulation Research
https://www.readbyqxmd.com/read/29352011/persistently-high-incidence-of-postcoronary-bypass-atrial-fibrillation-possible-mechanisms
#9
EDITORIAL
Nazem Akoum
No abstract text is available yet for this article.
January 19, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29352007/outcomes-in-anticoagulated-patients-with-atrial-fibrillation-and-with-mitral-or-aortic-valve-disease
#10
Dragos Vinereanu, Alice Wang, Hillary Mulder, Renato D Lopes, Petr Jansky, Basil S Lewis, Bernard J Gersh, Alvaro Avezum, Michael Hanna, Claes Held, Lars Wallentin, Christopher B Granger, John H Alexander
OBJECTIVE: To assess stroke/systemic embolism, major bleeding and other outcomes, and treatment effect of apixaban versus warfarin, in patients with atrial fibrillation (AF) and different types of valvular heart disease (VHD), using data from the Apixaban for Reduction in Stroke and Other Thromboembolic Events in Atrial Fibrillation trial. METHODS: There were 14 793 patients with known VHD status, categorised as having moderate or severe mitral regurgitation (MR) (n=3382), aortic regurgitation (AR) (n=842) or aortic stenosis (AS) (n=324); patients with moderate or severe mitral stenosis were excluded from the trial...
January 19, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29351855/the-relationship-of-circulating-fibroblast-growth-factor-21-levels-with-incident-atrial-fibrillation-the-multi-ethnic-study-of-atherosclerosis
#11
Tsz Him Hui, Robyn L McClelland, Matthew A Allison, Carlos J Rodriguez, Richard A Kronmal, Susan R Heckbert, Erin D Michos, Philip J Barter, Kerry-Anne Rye, Kwok Leung Ong
BACKGROUND AND AIMS: Elevated circulating levels of fibroblast growth factor 21 (FGF21) are associated with multiple cardiovascular disease (CVD) risk factors and incident events. Previous small cross-sectional studies, mainly in Chinese populations, have suggested FGF21 may play a role in the development of atrial fibrillation (AF). We therefore investigated the relationship of FGF21 levels with incident AF in participants free of clinically apparent CVD at baseline in a large, multi-ethnic cohort...
December 25, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/29351227/differential-association-of-cx37-and-cx40-genetic-variants-in-atrial-fibrillation-with-and-without-underlying-structural-heart-disease
#12
Sebastian Carballo, Anna Pfenniger, David Carballo, Nicolas Garin, Richard W James, François Mach, Dipen Shah, Brenda R Kwak
Atrial fibrillation (AF) appears in the presence or absence of structural heart disease. The majority of foci causing AF are located near the ostia of pulmonary veins (PVs), where cardiomyocytes and vascular smooth muscle cells interdigitate. Connexins (Cx) form gap junction channels and participate in action potential propagation. Genetic variants in genes encoding Cx40 and Cx37 affect their expression or function and may contribute to PV arrhythmogenicity. DNA was obtained from 196 patients with drug-resistant, symptomatic AF with and without structural heart disease, who were referred for percutaneous catheter ablation...
January 19, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29350433/amino-group-of-salicylic-acid-exhibits-enhanced-inhibitory-potential-against-insulin-amyloid-fibrillation-with-protective-aptitude-toward-amyloid-induced-cytotoxicity
#13
Masihuz Zaman, Mohsin Vahid Khan, Syed Mohammad Zakariya, Saima Nusrat, Syed Mustapha Meeran, Parvez Alam, Mohammad Rehan Ajmal, Wahiduzzaman Wahiduzzaman, Yasser E Shahein, Amira M Abouelella, Rizwan Hasan Khan
Protein misfolding and aggregation lead to amyloid generation that in turn may induce cell membrane disruption and leads to cell apoptosis. In an effort to prevent or treat amyloidogenesis, large number of studies has been paying attention on breakthrough of amyloid inhibitors. In the present work, we aim to access the effect of two drugs, that is, acetylsalicylic acid and 5-amino salicylic acid on insulin amyloids by using various biophysical, imaging, cell viability assay, and computational approaches. We established that both drugs reduce the turbidity, light scattering and fluorescence intensity of amyloid indicator dye thioflavin T...
December 11, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29350391/-polish-single-center-follow-up-of-s-icd-systems-implanted-for-the-prevention-of-sudden-cardiac-death
#14
Maciej Kempa, Szymon Budrejko, Grzegorz Sławiński, Tomasz Królak, Ewa Lewicka, Grzegorz Raczak
BACKGROUND AND AIM: Subcutaneous implantable cardioverter-defibrillator (S-ICD) is an effective and modern tool used to protect patients at risk of sudden cardiac death from potentially life-threatening ventricular arrhythmias. The first S-ICD systems were implanted in Poland in 2014, but since that time the national experience with that therapy has been limited. Our analysis summarizes the single-center experience at the Department of Cardiology and Electrotherapy of the Medical University of Gdansk with the use of S-ICD from the year 2014 to 2017...
January 19, 2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29350390/dual-antiplatelet-therapy-is-safe-and-efficient-after-left-atrial-appendage-closure
#15
Jakub Maksym, Tomasz Mazurek, Janusz Kochman, Marek Grygier, Agnieszka Kapłon-Cieślicka, Michał Marchel, Piotr Lodziński, Radosław Piątkowski, Radosław Wilimski, Paweł Czub, Anna Fojt, Natalia Karolczak, Piotr Hendzel, Grzegorz Opolski
BACKGROUND: Despite of PROTECT AF trial results many patients undergoing left atrial appendage closure (LAAC) have unconditional contraindications to warfarin. AIM: We sought to investigate whether double antiplatelet therapy (DAPT) is safe in patients after LAAC. METHODS: 44 (22 males, mean age 74±7.8) consecutive patients with non-valvular atrial fibrillation (NVAF) underwent LAAC procedure using Watchman device followed by DAPT (75 mg Aspirin and 75 mg Clopidogrel)...
January 19, 2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29350386/comparison-of-clinical-characteristics-of-real-life-atrial-fibrillation-patients-treated-with-vitamin-k-antagonists-dabigatran-and-rivaroxaban-results-from-the-craft-study
#16
Paweł Balsam, Krzysztof Ozierański, Agata Tymińska, Katarzyna Żukowska, Martyna Zaleska, Katarzyna Szepietowska, Kacper Maciejewski, Michał Peller, Marcin Grabowski, Piotr Lodziński, Anna Praska-Ogińska, Inna Zaboyska, Łukasz Kołtowski, Anna Kowalczuk, Janusz Bednarski, Krzysztof J Filipiak, Grzegorz Opolski
BACKGROUND: The first line drugs for treatment of non-valvular atrial fibrillation (AF) are non-vitamin K oral anticoagulants (NOACs), which are preferred over vitamin K antagonists (VKAs). There is some evidence that an everyday clinical practice is distant from the guidelines. AIM: The study aimed to compare characteristics of patients on VKAs, dabigatran and rivaroxaban met in everyday practice (i.e. baseline characteristics, drugs' doses, risk factors of bleeding and thromboembolic events)...
January 19, 2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29350378/eq-5d-studies-in-cardiovascular-diseases-in-eight-central-and-eastern-european-countries-a-systematic-review-of-the-literature
#17
Paulina Batóg, Fanni Rencz, Márta Péntek, László Gulácsi, Krzysztof J Filipiak, Valentina Prevolnik Rupel, Judit Simon, Valentin Brodszky, Petra Baji, Jakub Závada, Guenka Petrova, Alexandru Rotar, Dominik Golicki
BACKGROUND: The measurement of health-related quality of life (HRQOL) by validated generic instruments, such as EQ-5D, becomes an increasingly important tool for the assessment of health care in a wide range of different diagnoses. AIM: To systematically review EQ-5D literature generated in cardiovascular diseases in eight selected Central and Eastern Europe (CEE) countries. METHODS: A structured literature search was conducted in MEDLINE, EMBASE, Web of Science, CINAHL, PsycINFO, the Cochrane Library and the EuroQol website up to November 2016...
January 19, 2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29349888/distal-amyloid-%C3%AE-protein-fragments-template-amyloid-assembly
#18
Thanh D Do, Smriti Sangwan, Natália E C de Almeida, Alexandre I Ilitchev, Maxwell Giammona, Michael R Sawaya, Steven K Buratto, David S Eisenberg, Michael T Bowers
Amyloid formation is associated with devastating diseases such as Alzheimer's, Parkinson's and Type-2 diabetes. The large amyloid deposits found in patients suffering from these diseases have remained difficult to probe by structural means. Recent NMR models also predict heterotypic interactions from distinct peptide fragments but limited evidence of heterotypic packed sheets is observed in solution. Here we characterize two segments of the protein amyloid β (Aβ) known to form fibrils in Alzheimer's disease patients...
January 19, 2018: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/29349803/assessment-of-mitral-annulus-and-mitral-leaflet-in-nonvalvular-atrial-fibrillation-patients-with-various-degrees-of-mitral-regurgitation-real-time-3d-transesophageal-echocardiography
#19
Yongjuan Luo, Yanbo Zhu, Xin Guan, Yunjia Lin
AIM: To study the changes of mitral valve (MV) in patients with nonvalvular atrial fibrillation (NVAF)-related mitral regurgitation (MR) and the relationship between MV parameters and the enlarged left atrium (LA). MATERIALS AND METHODS: A total of 43 patients with NVAF were divided into two groups: (1) the MR1 group with mild MR and (2) the MR2 group with moderate-to-severe MR. Real time 3D transesophageal echocardiography (TEE) was performed to detect the structure of MV...
January 19, 2018: Echocardiography
https://www.readbyqxmd.com/read/29349596/concomitant-use-of-antiplatelets-and-anticoagulants-in-patients-with-coronary-heart-disease-and-atrial-fibrillation-what-do-recent-clinical-trials-teach-us
#20
REVIEW
David H Lam, Sean M Bell, Ravi S Hira
PURPOSE OF REVIEW: Coronary heart disease (CHD) and atrial fibrillation (AF) are among the most common cardiovascular diseases. A significant proportion of patients have both CHD and AF and are at increased risk for thrombotic complications. Current therapy for CHD and AF includes antiplatelet and anticoagulant medications, respectively. Patients with concurrent CHD and AF may be prescribed dual antiplatelet therapy (DAPT) in addition to anticoagulation, which increases their bleeding risk...
January 19, 2018: Current Atherosclerosis Reports
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