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https://www.readbyqxmd.com/read/28737715/latency-integration-and-reactivation-of-human-herpesvirus-6
#1
REVIEW
Shara N Pantry, Peter G Medveczky
Human herpesvirus-6A (HHV-6A) and human herpesvirus-6B (HHV-6B) are two closely related viruses that infect T-cells. Both HHV-6A and HHV-6B possess telomere-like repeats at the terminal regions of their genomes that facilitate latency by integration into the host telomeres, rather than by episome formation. In about 1% of the human population, human herpes virus-6 (HHV-6) integration into germline cells allows the viral genome to be passed down from one generation to the other; this condition is called inherited chromosomally integrated HHV-6 (iciHHV-6)...
July 24, 2017: Viruses
https://www.readbyqxmd.com/read/28737221/development-of-paradoxical-inflammatory-disorders-during-treatment-of-psoriasis-with-tnf-inhibitors-a-review-of-published-cases
#2
REVIEW
Martin Havmose, Simon Francis Thomsen
BACKGROUND: TNF inhibitors have proven to be effective and relatively safe in the management of psoriasis. While infections and certain malignancies are established as acknowledged side effects, paradoxical inflammatory, non-neoplastic, noninfectious adverse events are being recognized less frequently. We aimed to identify published, peer-reviewed cases of paradoxical inflammatory, non-neoplastic, noninfectious adverse events in psoriasis patients during TNF inhibitor therapy. METHODS: A literature search in MEDLINE was performed for articles published from inception through the 8th of June 2016 that reported suspected incidents fulfilling a predefined search strategy...
July 24, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28736653/hemispheric-differences-in-electrical-and-hemodynamic-responses-during-hemifield-visual-stimulation-with-graded-contrasts
#3
Juanning Si, Xin Zhang, Yujin Zhang, Tianzi Jiang
A multimodal neuroimaging technique based on electroencephalography (EEG) and functional near-infrared spectroscopy (fNIRS) was used with horizontal hemifield visual stimuli with graded contrasts to investigate the retinotopic mapping more fully as well as to explore hemispheric differences in neuronal activity, the hemodynamic response, and the neurovascular coupling relationship in the visual cortex. The fNIRS results showed the expected activation over the contralateral hemisphere for both the left and right hemifield visual stimulations...
April 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28736615/pulmonary-arteriovenous-malformations-complicated-by-splenic-infarction-and-abscess
#4
Jun Naito, Hajime Kasai, Masaki Suga, Toshihiko Sugiura, Nobuhiro Tanabe, Koichiro Tatsumi
Pulmonary arteriovenous malformation (PAVM) is an abnormal blood vessel connecting a pulmonary artery and a vein, and is accompanied by paradoxical embolism to other organs due to a right-to-left shunt. We report the case of a 66-year-old woman with PAVM complicated by splenic infarction and abscess. Although the PAVM had been detected on a chest image 2 years previously, and she had been advised to have further investigations, she decided not to follow this further at the time. She then visited our hospital complaining of worsening dyspnoea on exertion...
September 2017: Respirology Case Reports
https://www.readbyqxmd.com/read/28736278/efficacy-paradox-and-proportional-contextual-effect-pce
#5
Weiya Zhang, Michael Doherty
The "efficacy paradox" is when the effect of a treatment tested in an RCT, or evidence-based guideline advice, differs markedly from treatment benefits observed in clinical practice. This arises because in RCT reporting and guideline development treatment efficacy is judged by the separation of the treatment group from the placebo group (the specific treatment effect) whereas in clinical practice it is the overall treatment effect, which includes both specific and contextual responses, that patients experience...
July 20, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28736271/b-cells-and-their-cytokine-activities-implications-in-human-diseases
#6
Simon Fillatreau
B cells are the only cell type that can give rise to antibody-producing cells, and the only cell type whose selective depletion can, today, lead to an improvement of a wide range of immune-mediated inflammatory diseases, including disorders not primarily driven by autoantibodies. Here, I discuss this paradoxical observation, and propose that the capacity of B cells to act as cytokine-producing cells explains how they can control monocyte activity and subsequently disease pathogenesis. Together with current data on the effect of anti-CD20 B cell-depleting reagents in the clinic, this novel knowledge on B cell heterogeneity opens the way for novel safer and more efficient strategies to target B cells...
July 20, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28736170/overlap-among-spatial-memories-triggers-repulsion-of-hippocampal-representations
#7
Avi J H Chanales, Ashima Oza, Serra E Favila, Brice A Kuhl
Across the domains of spatial navigation and episodic memory, the hippocampus is thought to play a critical role in disambiguating (pattern separating) representations of overlapping events. However, it is not fully understood how and why hippocampal patterns become separated. Here, we test the idea that event overlap triggers a "repulsion" among hippocampal representations that develops over the course of learning. Using a naturalistic route-learning paradigm and spatiotemporal pattern analysis of human fMRI data, we found that hippocampal representations of overlapping routes gradually diverged with learning to the point that they became less similar than representations of non-overlapping events...
July 15, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28736135/theta-neurofeedback-effects-on-motor-memory-consolidation-and-performance-accuracy-an-apparent-paradox
#8
Miriam Reiner, Dror D Lev, Amit Rosen
Previous studies have shown that theta neurofeedback enhances motor memory consolidation on an easy-to-learn finger tapping task. However, the simplicity of the finger tapping task precludes evaluating the putative effects of elevated theta on performance accuracy. Mastering a motor sequence is classically assumed to entail faster performance with fewer errors. The speed-accuracy tradeoff (SAT) principle states thatas action speed increases, motor performance accuracy decreases. The current study investigated whether theta neurofeedback could improve both performance speed and performance accuracy, or would only enhance performance speed at the cost of reduced accuracy...
July 20, 2017: Neuroscience
https://www.readbyqxmd.com/read/28735450/prescription-drug-price-paradox-cost-analysis-of-canadian-online-pharmacies-versus-us-medicare-beneficiaries-for-the-top-100-drugs
#9
Sean Hyungwoo Kim, Young Joo Ryu, Na-Eun Cho, Andy Eunwoo Kim, Jongwha Chang
BACKGROUND AND OBJECTIVES: Despite the introduction of Medicare Part D (MPD) and 2012 Affordable Care Act (ACA), patients have a cost burden due to increases in drug prices. To overcome cost barriers, some patients purchase their medications from Canadian online pharmacies as Canadian prescription drug prices are believed to be lower than US prescription drug prices. The objective of this study was to determine which top 100 Medicare drugs can be imported to the USA legally, and to determine which type of prescription drug would be more beneficial to be purchased from Canadian online pharmacies...
July 22, 2017: Clinical Drug Investigation
https://www.readbyqxmd.com/read/28734777/inhibitor-mechanisms-in-the-s1-binding-site-of-the-dopamine-transporter-defined-by-multi-site-molecular-tethering-of-photoactive-cocaine-analogs
#10
Danielle Krout, Akula Bala Pramod, Rejwi Acharya Dahal, Michael J Tomlinson, Babita Sharma, James D Foster, Mu-Fa Zou, Comfort Boatang, Amy Hauck Newman, John R Lever, Roxanne A Vaughan, L Keith Henry
Dopamine transporter (DAT) blockers like cocaine and many other abused and therapeutic drugs bind and stabilize an inactive form of the transporter inhibiting reuptake of extracellular dopamine (DA). The resulting increases in DA lead to the ability of these drugs to induce psychomotor alterations and addiction, but paradoxical findings in animal models indicate that not all DAT antagonists induce cocaine-like behavioral outcomes. How this occurs is not known, but one possibility is that uptake inhibitors may bind at multiple locations or in different poses to stabilize distinct conformational transporter states associated with differential neurochemical endpoints...
July 19, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28734592/publishing-with-objective-charisma-breaking-science-s-paradox
#11
Zoë A Doubleday, Sean D Connell
Good writing takes time, but in a research environment where speed is master, is it a superfluous pursuit? Scientists spend most of their working life writing, yet our writing style obstructs its key purpose: communication. We advocate more accessible prose that boosts the influence of our publications. For those who change, the proof of their success will be science that is read, understood, and remembered.
July 19, 2017: Trends in Ecology & Evolution
https://www.readbyqxmd.com/read/28734026/falling-into-a-routine-from-habits-to-situated-practices
#12
Simon Cohn, Rebecca Lynch
In line with the concept of 'nudging' people to change their behaviour, there has been increased attention on habit as a focus for psychologically-based health interventions. It is hoped that behaviours initiated by interventions not only become so regular that they are normalised into people's everyday lives, but that through repetition they may eventually become fixed and habitual. In this paper we draw on people's accounts of participating in a trial designed to encourage greater physical activity, and attend to the ways they describe their engagement with interventions within wider narratives of their everyday lives...
July 21, 2017: Sociology of Health & Illness
https://www.readbyqxmd.com/read/28733446/how-does-pressure-overload-cause-cardiac-hypertrophy-and-dysfunction-high-ouabain-affinity-cardiac-na-pumps-are-crucial
#13
Mordecai P Blaustein
Left ventricular hypertrophy is frequently observed in hypertensive patients, and is believed to be due to the pressure overload and cardiomyocyte stretch. Three recent reports on mice with genetically-engineered Na(+) pumps, however, demonstrate that cardiac ouabain-sensitive α2 Na(+) pumps play a key role in the pathogenesis of trans-aortic constriction (TAC)-induced hypertrophy. Hypertrophy was delayed/attenuated in mice with mutant, ouabain-resistant α2 Na(+) pumps and in mice with cardiac-selective knockout (KO) or transgenic overexpression (TG) of α2 Na(+) pumps...
July 21, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28733375/addressing-reverse-causation-bias-in-the-obesity-paradox-is-not-one-size-fits-all
#14
Deirdre K Tobias
No abstract text is available yet for this article.
August 2017: Diabetes Care
https://www.readbyqxmd.com/read/28733371/an-mtr4-zfc3h1-complex-facilitates-turnover-of-unstable-nuclear-rnas-to-prevent-their-cytoplasmic-transport-and-global-translational-repression
#15
Koichi Ogami, Patricia Richard, Yaqiong Chen, Mainul Hoque, Wencheng Li, James J Moresco, John R Yates, Bin Tian, James L Manley
Many long noncoding RNAs (lncRNAs) are unstable and rapidly degraded in the nucleus by the nuclear exosome. An exosome adaptor complex called NEXT (nuclear exosome targeting) functions to facilitate turnover of some of these lncRNAs. Here we show that knockdown of one NEXT subunit, Mtr4, but neither of the other two subunits, resulted in accumulation of two types of lncRNAs: prematurely terminated RNAs (ptRNAs) and upstream antisense RNAs (uaRNAs). This suggested a NEXT-independent Mtr4 function, and, consistent with this, we isolated a distinct complex containing Mtr4 and the zinc finger protein ZFC3H1...
July 21, 2017: Genes & Development
https://www.readbyqxmd.com/read/28733124/left-upper-lung-lobectomy-is-an-embolic-risk-factor-for-cerebral-infarction
#16
Yuya Kobayashi, Hiroyuki Yahikozawa, Ryota Takamatsu, Rie Watanabe, Kenichi Hoshi, Wataru Ishii, Shunichi Sato
Cerebral embolism is typically caused by a cardiogenic thrombus. The patent foramen ovale is a well-known cause of paradoxical embolism. However, some idiopathic cases of stroke have been reported. Such strokes are designated as embolic stroke of undetermined sources. Among them, lung lobectomy may be a new embolic risk factor for cerebral embolism. The risk of thrombus formation is high at the pulmonary vein stump after lung lobectomy, especially in the left upper lobe. Interestingly, the risk remains several years after surgery...
July 19, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28733121/paradoxical-embolism-in-a-girl-with-atrial-septal-defect-after-paroxysmal-supraventricular-tachycardia-ablation
#17
Xiang Chen, Zhijun Zhu, Danning Wu
Paradoxical embolism is a kind of important pathogenesis of cardiocerebrovascular diseases. In our case, radiofrequency current catheter ablation was accomplished successfully in a 15-year-old girl who had been experiencing supraventricular tachycardia for 6 months. She presented with abrupt onset of left hemiplegia and loss of consciousness on the first postoperative day. An urgent cerebral computed tomography showed a hyperdense right middle cerebral artery. Transthoracic echocardiogram examination revealed an atrial septal defect (ASD), with the diameter measuring 39 mm...
July 19, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28732557/a-negative-slope-conductance-of-the-persistent-sodium-current-prolongs-subthreshold-depolarizations
#18
Cesar C Ceballos, Antonio C Roque, Ricardo M Leão
Neuronal subthreshold voltage-dependent currents determine membrane properties such as the input resistance (Rin) and the membrane time constant (τm) in the subthreshold range. In contrast with classical cable theory predictions, the persistent sodium current (INaP), a non-inactivating mode of the voltage-dependent sodium current, paradoxically increases Rin and τm when activated. Furthermore, this current amplifies and prolongs synaptic currents in the subthreshold range. Here, using a computational neuronal model, we showed that the creation of a region of negative slope conductance by INaP activation is responsible for these effects and the ability of the negative slope conductance to amplify and prolong Rin and τm relies on the fast activation of INaP...
July 18, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28732195/fake-inhibitors-ampk-activation-trumps-inhibition
#19
Christopher G Langendorf, John W Scott, Bruce E Kemp
Protein kinase inhibitors have become increasingly important therapeutic drugs for the treatment of human diseases; however, resistance and off-target effects can limit their use. In this issue of Cell Chemical Biology, Ross et al. (2017) reveal a novel off-target mechanism where the Src kinase inhibitor SU6656 paradoxically primes AMPK for phosphorylation and activation by the upstream kinase LKB1.
July 20, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28732173/exploring-the-potential-of-gametic-reconstruction-of-parental-genotypes-by-f-sub-1-sub-hybrids-as-a-bridge-for-rapid-introgression
#20
Charles H Cannon, C Lane Scher
Interspecific hybridization and genetic introgression are commonly observed in natural populations of many species, especially trees. Among oaks, gene flow between closely-related species has been well documented. And yet, hybridization does not lead to a 'melting pot', i.e. the homogenization of phenotypic traits. Here, we explore how the combination of several common reproductive traits and genomic biology could create an avenue for interspecific gene flow that partially explains this apparent paradox. During meiosis, F<sub>1</sub> hybrids will produce approximately (½)<sup>n</sup> 'reconstructed' parental gametes, where n equals the number of chromosomes...
July 21, 2017: Genome Génome / Conseil National de Recherches Canada
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