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https://www.readbyqxmd.com/read/28091676/hemispherical-platinum%C3%A2-%C3%A2-silver-core%C3%A2-%C3%A2-shell-nanoparticles-for-mirna-detection
#1
Elaine Spain, Kellie Adamson, Mohammad Elshahawy, Isabella Bray, Tia E Keyes, Raymond L Stallings, Robert J Forster
Defects within a self-assembled monolayer (SAM) of dodecanethiol on gold have been used as nucleation sites for the electrodeposition of mushroom shaped platinum nanoparticles (PtNPs). The top surfaces of these PtNPs were then decorated with a layer of silver creating a hemispherical - platinum : silver core : shell nanoparticle (Pt-AgNP). Thiolated probe strand miRNA was then immobilised onto the upper silver surface. These regioselectively modified particles were desorbed by applying a current jump to yield nanoparticles capable of hybridising to a complementary miRNA target with electrocatalysis occurring on the non-functionalized lower surface...
January 16, 2017: Analyst
https://www.readbyqxmd.com/read/28089564/cardiorespiratory-fitness-after-transient-ischemic-attack-and-minor-ischemic-stroke-baseline-data-of-the-moveit-study
#2
H Myrthe Boss, IngerA Deijle, SanderM Van Schaik, EdwinC de Melker, BobT J van den Berg, HenryC Weinstein, MirjamI Geerlings, L Jaap Kappelle, RenskeM Van den Berg-Vos
BACKGROUND: Cardiorespiratory fitness (CRF) is reduced in patients with stroke. It is unclear whether it is also reduced in patients with a transient ischemic attack (TIA) or minor stroke. We investigated the CRF in patients with a recent TIA or minor stroke and explored which determinants are associated with a lower fitness. METHODS: In 113 patients with a recent TIA or minor ischemic stroke (64 (SD = 10) years of age; 49 (IQR 27-86) days post TIA or stroke), the peak oxygen consumption (VO2peak) was determined in a symptom-limited ramp exercise test...
January 12, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28088807/posterior-versus-anterior-circulation-stroke-in-young-adults-a-comparative-study-of-stroke-aetiologies-and-risk-factors-in-stroke-among-young-fabry-patients-sifap1
#3
Bettina von Sarnowski, Ulf Schminke, Ulrike Grittner, Christian Tanislav, Tobias Böttcher, Michael G Hennerici, Turgut Tatlisumak, Jukka Putaala, Manfred Kaps, Franz Fazekas, Christian Enzinger, Arndt Rolfs, Christof Kessler
BACKGROUND: Although 20-30% of all strokes occur in the posterior circulation, few studies have explored the characteristics of patients with strokes in the posterior compared to the anterior circulation so far. Especially data on young patients is missing. METHODS: In this secondary analysis of data of the prospective multi-centre European sifap1 study that investigated stroke and transient ischemic attack (TIA) patients aged 18-55 years, we compared vascular risk factors, stroke aetiology, presence of white matter hyperintensities (WMH) and cerebral microbleeds (CMB) between patients with ischaemic posterior circulation stroke (PCS) and those having suffered from anterior circulation stroke (ACS) based on cerebral MRI...
January 14, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/28087176/carotid-plaque-detection-improves-the-predictive-value-of-cha2ds2-vasc-score-in-patients-with-non-valvular-atrial-fibrillation-the-arapacis-study
#4
Stefania Basili, Lorenzo Loffredo, Daniele Pastori, Marco Proietti, Alessio Farcomeni, Anna Rita Vestri, Pasquale Pignatelli, Giovanni Davì, William R Hiatt, Gregory Y H Lip, Gino R Corazza, Francesco Perticone, Francesco Violi
BACKGROUND AND AIMS: Vascular disease (VD), as assessed by history of myocardial infarction or peripheral artery disease or aortic plaque, increases stroke risk in atrial fibrillation (AF), and is a component of risk assessment using the CHA2DS2-VASc score. We investigated if systemic atherosclerosis as detected by ultrasound carotid plaque (CP) could improve the predictive value of the CHA2DS2-VASc score. METHODS: We analysed data from the ARAPACIS study, an observational study including 2027 Italian patients with non-valvular AF, in whom CP was detected using Doppler Ultrasonography...
January 4, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28079899/genome-sequencing-and-carrier-testing-decisions-on-categorization-and-whether-to-disclose-results-of-carrier-testing
#5
Patricia Himes, Tia L Kauffman, Kristin R Muessig, Laura M Amendola, Jonathan S Berg, Michael O Dorschner, Marian Gilmore, Deborah A Nickerson, Jacob A Reiss, C Sue Richards, Alan F Rope, Dana K Simpson, Benjamin S Wilfond, Gail P Jarvik, Katrina A B Goddard
PURPOSE: We investigated the use of genome sequencing for preconception carrier testing. Genome sequencing could identify one or more of thousands of X-linked or autosomal recessive conditions that could be disclosed during preconception or prenatal counseling. Therefore, a framework that helps both clinicians and patients understand the possible range of findings is needed to respect patient preferences by ensuring that information about only the desired types of genetic conditions are provided to a given patient...
January 12, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28077819/association-between-blood-transfusions-and-12-month-mortality-after-transcatheter-aortic-valve-implantation
#6
Pawel Kleczynski, Artur Dziewierz, Maciej Bagienski, Lukasz Rzeszutko, Danuta Sorysz, Jaroslaw Trebacz, Robert Sobczynski, Marek Tomala, Maciej Stapor, Dariusz Dudek
Blood transfusions are considered as an important predictor of adverse outcome in patients with severe aortic (AS) undergoing transcatheter aortic valve implantation (TAVI). We sought to investigate the association between blood transfusions and mortality after TAVI. We enrolled 101 consecutive patients with severe AS undergoing TAVI. Patients who required transfusion were defined as patients in whom at least one unit of packed red blood cells (PRBCs) was transfused in the perioperative period. Twelve-month outcomes were assessed based on Valve Academic Research Consortium definitions...
January 11, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28074585/a-good-death
#7
Tia Powell, Adira Hulkower
A good death is hard to find. Family members tell us that loved ones die in the wrong place-the hospital-and do not receive high-quality care at the end of life. This issue of the Hastings Center Report offers two articles from authors who strive to provide good end-of-life care and to prevent needless suffering. We agree with their goals, but we have substantial reservations about the approaches they recommend. Respect for the decisions of patients and their surrogates is a relatively new and still vulnerable aspect of medical care...
January 2017: Hastings Center Report
https://www.readbyqxmd.com/read/28073886/endocardial-left-ventricular-pacing-for-cardiac-resynchronization-systematic-review-and-meta-analysis
#8
James Hugo Phillimore Gamble, Neil Herring, Matthew Ginks, Kim Rajappan, Yaver Bashir, Timothy Rider Betts
AIMS: Endocardial left ventricular (LV) pacing for Cardiac Resynchronization Therapy has been proposed as an alternative to conventional LV lead placement via the coronary sinus. In order to assess the relative benefits and risks of this technique, we have performed a meta-analysis of published reports. METHODS AND RESULTS: A systemic search was performed using online databases to identify studies of lead-based endocardial pacing. A random-effects meta-analysis was performed, to assess the rate of complications and clinical response (defined as ≥1 decrease in NYHA class)...
January 10, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28064431/the-prevalence-and-clinical-significance-of-sleep-disorders-in-acute-ischemic-stroke-patients-a-questionnaire-study
#9
Keun Tae Kim, Hye-Jin Moon, Jun-Gyu Yang, Sung-Ii Sohn, Jeong-Ho Hong, Yong Won Cho
PURPOSE: Sleep disturbances are frequently reported in stroke patients and associated with the outcome of strokes. Using sleep questionnaires, we investigated the prevalence of classified sleep disturbance and the influence of sleep disorders upon a stroke prognosis. METHODS: Patients with acute ischemic strokes or transient ischemic attacks (TIA) were included. We investigated the prevalence of sleep disturbance and the association of outcomes resulting from strokes...
January 7, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28056795/bleeding-outcomes-associated-with-rivaroxaban-and-dabigatran-in-patients-treated-for-atrial-fibrillation-a-systematic-review-and-meta-analysis
#10
Pravesh Kumar Bundhun, Mohammad Zafooruddin Sani Soogund, Abhishek Rishikesh Teeluck, Manish Pursun, Akash Bhurtu, Wei-Qiang Huang
BACKGROUND: Warfarin is commonly used as a secondary prevention of stroke in patients with atrial fibrillation (AF). However, limitations have been observed even with the use of this medication. Recently, several newer direct oral anticoagulants (DOACs) have been approved for use by the food and drug administrations. Unfortunately, these newer drugs have seldom been compared directly with each other. Therefore, this study aimed to compare the bleeding events associated with rivaroxaban and dabigatran in patients treated for non-valvular AF...
January 6, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28051252/study-on-influence-of-transient-ischemic-attack-on-subsequent-cerebral-infarction
#11
H-L Huang, N Wang, H Zhou, C-Y Yu
OBJECTIVE: To investigate whether transient ischemic attack (TIA) had an ischemic preconditioning neuroprotective effect on subsequent cerebral infarction. PATIENTS AND METHODS: 232 patients with cerebral infarction were selected and divided into Group A (<55 years old), Group B (55-75 years old) and Group C (>75 years old), according to age. Each group was further divided into sub-groups A1, A2, B1, B2, C1, C2, according to whether there was any TIA within 48 hours after cerebral infarction or not, to compare the neurological deficit scores and the size of cerebral infarction in different groups...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28050720/indocyanine-green-visualization-of-middle-meningeal-artery-before-craniotomy-during-surgical-revascularization-for-moyamoya-disease
#12
Nozomu Tanabe, Shusuke Yamamoto, Daina Kashiwazaki, Naoki Akioka, Naoya Kuwayama, Kyo Noguchi, Satoshi Kuroda
BACKGROUND: The middle meningeal artery (MMA) is well known to function as an important collateral channel to the territory of the anterior cerebral artery in moyamoya disease. This study was aimed to evaluate whether indocyanine green (ICG) videoangiography could visualize the anterior branch of the MMA before craniotomy during surgical revascularization for moyamoya disease. METHODS: This study included 19 patients who developed TIA, ischemic stroke or hemorrhagic stroke due to moyamoya disease...
January 3, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28049644/functional-prions-in-the-brain
#13
REVIEW
Joseph B Rayman, Eric R Kandel
Prions are proteins that can adopt self-perpetuating conformations and are traditionally regarded as etiological agents of infectious neurodegenerative diseases in humans, such as Creutzfeldt-Jakob disease, kuru, and transmissible encephalopathies. More recently, a growing consensus has emerged that prion-like, self-templating mechanisms also underlie a variety of neurodegenerative disorders, including amyotrophic lateral sclerosis, Alzheimer's disease, and Huntington's disease. Perhaps most surprising, not all prion-like aggregates are associated with pathological changes...
January 3, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28048794/su-f-i-54-spatial-resolution-studies-in-proton-ct-using-a-phase-ii-prototype-head-scanner
#14
Tia E Plautz, R P Johnson, H F-W Sadrozinski, A Zatserklyaniy, V Bashkirov, R F Hurley, R W Schulte, P Piersimoni, V Giacometti
PURPOSE: To characterize the modulation transfer function (MTF) of the pre-clinical (phase II) head scanner developed for proton computed tomography (pCT) by the pCT collaboration. To evaluate the spatial resolution achievable by this system. METHODS: Our phase II proton CT scanner prototype consists of two silicon telescopes that track individual protons upstream and downstream from a phantom, and a 5-stage scintillation detector that measures a combination of the residual energy and range of the proton...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28042830/programmable-low-power-low-noise-capacitance-to-voltage-converter-for-mems-accelerometers
#15
Guillermo Royo, Carlos Sánchez-Azqueta, Cecilia Gimeno, Concepción Aldea, Santiago Celma
In this work, we present a capacitance-to-voltage converter (CVC) for capacitive accelerometers based on microelectromechanical systems (MEMS). Based on a fully-differential transimpedance amplifier (TIA), it features a 34-dB transimpedance gain control and over one decade programmable bandwidth, from 75 kHz to 1.2 MHz. The TIA is aimed for low-cost low-power capacitive sensor applications. It has been designed in a standard 0.18-μm CMOS technology and its power consumption is only 54 μW. At the maximum transimpedance configuration, the TIA shows an equivalent input noise of 42 fA/ Hz at 50 kHz, which corresponds to 100 μg/ Hz ...
December 30, 2016: Sensors
https://www.readbyqxmd.com/read/28042459/precision-targeted-ruthenium-ii-luminophores-highly-effective-probes-for-cell-imaging-by-stimulated-emission-depletion-sted-microscopy
#16
Aisling Byrne, Christopher S Burke, Tia E Keyes
Fluorescence microscopy has undergone a dramatic evolution over the past two decades with development of super-resolution far-field microscopy methods that break the light diffraction limited resolution of conventional microscopy, offering unprecedented opportunity to interrogate cellular processes at the nanoscale. However, these methods make special demands of the luminescent agents used for contrast and development of probes suited to super-resolution fluorescent methods is still relatively in its infancy...
October 19, 2016: Chemical Science
https://www.readbyqxmd.com/read/28039189/factor-xi-deficiency-is-associated-with-decreased-risk-for-cardiovascular-and-venous-thromboembolism-events
#17
Meir Preis, Julianna Hirsch, Antonio Kotler, Ahmad Zoabi, Nili Stein, Gad Rennert, Walid Saliba
Factor XI deficiency is one of the rare inherited coagulation factor deficiencies. However, it incidence is high among Ashkenazi Jewish. Because factor XI displays both procoagulant and antifibrinolytic activities, it has been postulated that an underlying cardiovascular benefit may exist with factor XI deficiency. This historical cohort study was performed using the electronic database of Clalit Health Services, the largest health care provider in Israel. All adults tested for Factor XI activity between 2002 and 2014 were included in the study...
December 30, 2016: Blood
https://www.readbyqxmd.com/read/28036025/transcriptional-regulation-and-transport-of-terpenoid-indole-alkaloid-in-catharanthus-roseus-exploration-of-new-research-directions
#18
REVIEW
Jiaqi Liu, Junjun Cai, Rui Wang, Shihai Yang
As one of the model medicinal plants for exploration of biochemical pathways and molecular biological questions on complex metabolic pathways, Catharanthus roseus synthesizes more than 100 terpenoid indole alkaloids (TIAs) used for clinical treatment of various diseases and for new drug discovery. Given that extensive studies have revealed the major metabolic pathways and the spatial-temporal biosynthesis of TIA in C. roseus plant, little is known about subcellular and inter-cellular trafficking or long-distance transport of TIA end products or intermediates, as well as their regulation...
December 28, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28031277/the-increased-risk-of-stroke-transient-ischemic-attack-in-women-with-a-cardiac-implantable-electronic-device-is-not-associated-with-a-higher-atrial-fibrillation-burden
#19
Giuseppe Boriani, Gregory Y H Lip, Renato Pietro Ricci, Alessandro Proclemer, Maurizio Landolina, Maurizio Lunati, Luigi Padeletti, Gabriele Zanotto, Giulio Molon, Mauro Biffi, Roberto Rordorf, Fabio Quartieri, Maurizio Gasparini
AIMS: To evaluate if the increased thromboembolic risk in female patients may be related to a higher burden of atrial fibrillation (AF). METHODS AND RESULTS: Data collected in a prospective observational research of patients implanted with a cardiac implantable electrical device (CIED) were analysed. We included 2398 patients: 489 (20.4%) were female and 1909 (79.6%) were male (oral anticoagulants treatment in 23.2%, independent of gender). During the follow-up (mean 42...
December 28, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28028400/transcatheter-closure-of-patent-foramen-ovale-a-single-center-experience
#20
Ivan Milev, Planinka Zafirovska, Zan Zimbakov, Shpend Idrizi, Vilma Ampova-Sokolov, Emilija Gorgieva, Liljana Ilievska, Goce Tosheski, Nikola Hristov, Ljubica Georgievska-Ismail, Tanja Anguseva, Zan Mitrev
BACKGROUND: Percutaneous transcatheter closure (PTC) of patent foramen ovale (PFO) is implicated in cryptogenic stroke, transitional ischemic attack (TIA) and treatment of a migraine. AIM: Our goal was to present our experience in the interventional treatment of PFO, as well as to evaluate the short and mid-term results in patients with closed PFO. MATERIAL AND METHODS: Transcatheter closure of PFO was performed in 52 patients (67.3% women, mean age 40...
December 15, 2016: Open Access Macedonian Journal of Medical Sciences
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