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https://www.readbyqxmd.com/read/28324065/neurod-factors-discriminate-mineralocorticoid-from-glucocorticoid-receptor-dna-binding-in-the-male-rat-brain
#1
Lisa T C M van Weert, Jacobus C Buurstede, Ahmed Mahfouz, Pamela S M Braakhuis, J Annelies E Polman, Hetty C M Sips, Benno Roozendaal, Judit Balog, E Ronald de Kloet, Nicole A Datson, Onno C Meijer
In the limbic brain, mineralocorticoid receptors (MRs) and glucocorticoid receptors (GRs) both function as receptors for the naturally occurring glucocorticoids (corticosterone/cortisol), but mediate distinct effects on cellular physiology via transcriptional mechanisms. The transcriptional basis for specificity of these MR- versus GR-mediated effects is unknown. To address this conundrum we have identified the extent of MR/GR DNA binding selectivity in the rat hippocampus using chromatin immunoprecipitation followed by sequencing (ChIP-seq)...
January 24, 2017: Endocrinology
https://www.readbyqxmd.com/read/28316113/the-utility-of-exercise-testing-in-risk-stratification-of-asymptomatic-patients-with-type-1-brugada-pattern
#2
Muthiah Subramanian, Mukund A Prabhu, M S Harikrishnan, Saritha S Shekhar, Praveen G Pai, K U Natarajan
INTRODUCTION: Risk stratification of asymptomatic patients with a Brugada type 1 ECG pattern remains an unresolved clinical conundrum. In contrast to provocative pharmacological testing in Brugada syndrome, there is limited data on the role of exercise stress testing as a risk stratification modality. The objective of this study was to evaluate the utility of exercise testing in asymptomatic patients with type 1 Brugada pattern to prognosticate major arrhythmic events(MAE) during follow-up...
March 18, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28314518/the-interface-between-chronic-fatigue-syndrome-and-depression-a-psychobiological-and-neurophysiological-conundrum
#3
Derek Larkin, Colin R Martin
The chronic fatigue syndrome (CFS) remains a contentious and controversial presentation despite decades of systematic research from a variety of medical specialties and associated disciplines. Variously championed as a condition of immunological, neurological, neurophysiological, psychiatric or psychological origin, consensus on a cogent and evidenced-based pathway has yet to be achieved. Irrespective of the ambiguity regarding aetiology, what is incontrovertible is the experience of significant depression, which often accompanies this most distressing clinical presentation...
March 14, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28299201/lyssaviruses-and-rabies-current-conundrums-concerns-contradictions-and-controversies
#4
REVIEW
Charles Rupprecht, Ivan Kuzmin, Francois Meslin
Lyssaviruses are bullet-shaped, single-stranded, negative-sense RNA viruses and the causative agents of the ancient zoonosis rabies. Africa is the likely home to the ancestors of taxa residing within the Genus Lyssavirus, Family Rhabdoviridae. Diverse lyssaviruses are envisioned as co-evolving with bats, as the ultimate reservoirs, over seemingly millions of years. In terms of relative distribution, overt abundance, and resulting progeny, rabies virus is the most successful lyssavirus species today, but for unknown reasons...
2017: F1000Research
https://www.readbyqxmd.com/read/28296748/efficacy-of-lidocaine-on-preventing-incidence-and-severity-of-pain-associated-with-propofol-using-in-pediatric-patients-a-prisma-compliant-meta-analysis-of-randomized-controlled-trials
#5
Bing-Chen Lang, Chun-Song Yang, Ling-Li Zhang, Wen-Sheng Zhang, Yu-Zhi Fu
BACKGROUND: Propofol injection pain was considered as one conundrum during clinical anesthesia. The systematic review about the effect of lidocaine in reducing injection pain among children has not been established. The aim of the study was to systematically evaluate the efficacy and safety of such intervention. METHODS: The literature search was performed from the inception to the May 31, 2016 in PubMed, Ovid EMBASE, and Cochrane database. All randomized controlled trials that using lidocaine for propofol injection pain in children were enrolled...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28291828/retinoic-acid-exacerbates-chlorpyrifos-action-in-ensuing-adipogenic-differentiation-of-c3h10t%C3%A2-cells-in-a-gsk3%C3%AE-dependent-pathway
#6
Harkirat Singh Sandhu, A J S Bhanwer, Sanjeev Puri
The cell differentiation can be exploited as a paradigm to evaluate the effects of noxious chemicals, on human health, either alone or in combinations. In this regard, the effect of a known cell differentiation agent, retinoic acid (RA) was analyzed in the presence of a noxious chemical chlorpyrifos (CPF), an organophosphate (OP), the receptors of which have recently been localized to mesenchymal stem cells (MSCs). The observed imbalance of adipogenic to skeletal differentiation by CPF together with conundrum about adipogenic potential of RA prompted us to delineate their combinatorial effects on C3H10T½MSC-like undifferentiated cells...
2017: PloS One
https://www.readbyqxmd.com/read/28289598/massive-hemoptysis-in-a-patient-with-pulmonary-embolism-a-real-therapeutic-conundrum
#7
Yiolanda Herodotou, Andriana I Papaioannou, Anna Karakatsani, Lazaros Reppas, Effrosyni D Manali, Vasiliki Apollonatou, Ioannis Tomos, Elias Brountzos, Spyros Papiris
Massive Hemoptysis and pulmonary embolism are two very severe and potentially fatal pulmonary emergencies requiring completely different treatments. We present the case of a 45-year old male transmitted to our Hospital for massive hemoptysis who at the same time was found to suffer from pulmonary embolism. Hemoptysis was treated with bronchial artery embolization which resulted in cessation of haemorrhage and allowed the administration of anticoagulant therapy a few days later. This case report gives an answer on how to manage a real therapeutic conundrum which is the coexistence of a massive hemoptysis and a concomitant pulmonary embolism...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28289507/impact-of-t-cells-on-hematopoietic-stem-and-progenitor-cell-function-good-guys-or-bad-guys
#8
REVIEW
Sulima Geerman, Martijn A Nolte
When hematopoietic stem and progenitor cells (HSPC) are harvested for transplantation, either from the bone marrow or from mobilized blood, the graft contains a significant number of T cells. It is these T cells that are the major drivers of graft-vs-host disease (GvHD). The risk for GvHD can simply be reduced by the removal of these T cells from the graft. However, this is not always desirable, as this procedure also decreases the engraftment of the transplanted HSPCs and, if applicable, a graft-vs-tumor effect...
February 26, 2017: World Journal of Stem Cells
https://www.readbyqxmd.com/read/28288720/clonal-b-cell-lymphocytosis-of-marginal-zone-origin
#9
REVIEW
Aliki Xochelli, David Oscier, Kostas Stamatopoulos
Monoclonal B cell Lymphocytosis (MBL) is the term used to characterize individuals presenting with lymphocytosis in the absence of lymphadenopathy, organomegaly or any other features suggestive of an active disease. Based on the immunophenotypic findings, MBL cases are sub-categorized into chronic lymphocytic leukemia (CLL)-like, atypical CLL and non-CLL MBL. The latter corresponds to cases with immunophenotypic features suggestive of post germinal center derivation and still represents a diagnostic conundrum...
March 2017: Best Practice & Research. Clinical Haematology
https://www.readbyqxmd.com/read/28285294/the-conundrum-of-optimal-drug-dosing-in-obese-children
#10
Podhini Jegadeesan, Thirunavukkarasu Arun Babu
No abstract text is available yet for this article.
February 15, 2017: Indian Pediatrics
https://www.readbyqxmd.com/read/28282160/fast-dynamics-of-water-droplets-freezing-from-the-outside-in
#11
Sander Wildeman, Sebastian Sterl, Chao Sun, Detlef Lohse
A drop of water that freezes from the outside in presents an intriguing problem: the expansion of water upon freezing is incompatible with the self-confinement by a rigid ice shell. Using high-speed imaging we show that this conundrum is resolved through an intermittent fracturing of the brittle ice shell and cavitation in the enclosed liquid, culminating in an explosion of the partially frozen droplet. We propose a basic model to elucidate the interplay between a steady buildup of stresses and their fast release...
February 24, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28281423/an-imaginary-legal-conundrum-a-reply-to-the-response-by-mahomed-n%C3%A3-thling-slabbert-and-pepper
#12
D Jordaan
In their original article on the subject of research using human biological material, Mahomed, Nöthling-Slabbert and Pepper advanced the notion that the law regarding ownership of human biological material is uncertain, and proposed that our country's healthcare policy of altruism be changed to mandatory profit-sharing by research participants. In my critique article, I took issue with the notion that the relevant law is uncertain, and suggested that Mahomed et al. failed to present a convincing argument in support of the proposed policy change from altruism to profit-sharing...
February 27, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28281422/ownership-and-human-tissue-the-legal-conundrum-a-response-to-jordaan-s-critique
#13
S Mahomed, M Nöthling-Slabbert, M S Pepper
The debate over whether there should be a property or non-property approach with regard to human tissue is only the tip of the iceberg, because the issues involved are very complex, reflecting profound considerations on the nature of the self and the structuring of society; the balance of power between the citizen, the government and commercial interests; and human beings' perceptions of themselves and their bodies. This article responds to a publication by Donrich Jordaan titled 'Social justice and research using human biological material: A response to Mahomed, Nöthling-Slabbert and Pepper' in the July 2016 SAMJ...
February 27, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28280487/candida-albicans-mycofilms-support-staphylococcus-aureus-colonization-and-enhances-miconazole-resistance-in-dual-species-interactions
#14
Ryan Kean, Ranjith Rajendran, Jennifer Haggarty, Eleanor M Townsend, Bryn Short, Karl E Burgess, Sue Lang, Owain Millington, William G Mackay, Craig Williams, Gordon Ramage
Polymicrobial inter-kingdom biofilm infections represent a clinical management conundrum. The presence of co-isolation of bacteria and fungi complicates the ability to routinely administer single antimicrobial regimens, and synergy between the microorganisms influences infection severity. We therefore investigated the nosocomial pathogens Staphylococcus aureus and Candida albicans with respect to antimicrobial intervention. We characterized the interaction using biofilm assays and evaluated the effect of miconazole treatment using in vitro and in vivo assays...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28277682/evidence-for-singlet-fission-driven-by-vibronic-coherence-in-crystalline-tetracene
#15
Adrian F Morrison, John M Herbert
Singlet fission proceeds rapidly and with high quantum efficiency in both crystalline tetracene and pentacene, which poses a conundrum given that the process in tetracene is disfavored by the electronic energetics. Here, we use an ab initio exciton model to compute nonadiabatic couplings in the unit cell of tetracene in order to identify the modes that promote this process. Four intramolecular modes in the range of 1400-1600 cm(-1), which are nearly resonant with the single-exciton/multiexciton energy gap, appear to play a key role...
March 17, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28276135/-seeking-authorization-a-grounded-theory-exploration-of-mentors-experiences-of-assessing-nursing-students-on-the-borderline-of-achievement-of-competence-in-clinical-practice
#16
Simon Cassidy, Michael Coffey, Fiona Murphy
AIM: To develop a substantive theoretical explanation of how mentors make sense of their experiences where nursing students are on the borderline of achievement of competence in clinical practice. BACKGROUND: The reluctance of registered nurse mentors to fail nursing students in clinical practice despite concerns about competence remains a contemporary issue in international healthcare education. Mentors' assessment decisions have considerable impact for a variety of key stakeholders, not least for students in these circumstances...
March 9, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28274543/electrocardiographic-conundrum-what-is-the-reason-of-qrs-axis-variability
#17
Giuseppe Picciolo, Lilia Oreto
No abstract text is available yet for this article.
February 22, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28258158/dual-role-of-the-histone-variant-h2a-z-in-transcriptional-regulation-of-stress-response-genes
#18
Weronika Sura, Michał Kabza, Wojciech M Karlowski, Tomasz Bieluszewski, Marta Kuś-Slowinska, Łukasz Pawełoszek, Jan Sadowski, Piotr A Ziolkowski
The influence of the histone variant H2A.Z on transcription remains a long-standing conundrum. Here, by analyzing the actin-related protein6 mutant, which is impaired in H2A.Z deposition, and by H2A.Z profiling in stress conditions, we investigated the impact of this histone variant on gene expression in Arabidopsis thaliana. We demonstrate that the arp6 mutant exhibits anomalies in response to osmotic stress. Indeed, stress-responsive genes are overrepresented amongst those hyperactive in arp6. In wild-type plants, these genes exhibit high levels of H2A...
March 3, 2017: Plant Cell
https://www.readbyqxmd.com/read/28257464/integrative-taxonomy-of-root-knot-nematodes-reveals-multiple-independent-origins-of-mitotic-parthenogenesis
#19
Toon Janssen, Gerrit Karssen, Olivera Topalović, Danny Coyne, Wim Bert
During sampling of several Coffea arabica plantations in Tanzania severe root galling, caused by a root-knot nematode was observed. From pure cultures, morphology and morphometrics of juveniles and females matched perfectly with Meloidogyne africana, whereas morphology of the males matched identically with those of Meloidogyne decalineata. Based on their Cox1 sequence, however, the recovered juveniles, females and males were confirmed to belong to the same species, creating a taxonomic conundrum. Adding further to this puzzle, re-examination of M...
2017: PloS One
https://www.readbyqxmd.com/read/28255152/follicular-thyroid-cancer-with-sternal-metastasis-challenges-and-outcomes
#20
M A Syazni, H S Gendeh, N R Kosai, A R Ramzisham, B S Gendeh, N H Basiron, F H Imran
Sternal metastasis from differentiated thyroid carcinoma (DTC) is rare and presents a conundrum for surgeons. We present a lady diagnosed with follicular thyroid carcinoma and sternal metastasis who underwent thyroidectomy, sternectomy and sternoplasty with titanium mesh and acrylic plate. She developed a surgical site infection, of which multiple conservative approaches were attempted. She eventually required removal of the implant. Closure of sternal defect was completed with bilateral pectoralis major advancement flaps...
February 2017: Medical Journal of Malaysia
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