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https://www.readbyqxmd.com/read/28933357/risk-of-asymptomatic-bacteriuria-among-people-with-sickle-cell-disease-in-accra-ghana
#1
Eric S Donkor, Jonathan A Osei, Isaac Anim-Baidoo, Samuel Darkwah
Asymptomatic bacteriuria (ASB) is benign except in certain medical conditions such as pregnancy and immunosuppression. In Ghana, there are hardly any studies on urinary infections among sickle cell disease (SCD) patients, and the few studies carried out in Africa focused on pediatric SCD populations. The current study aimed to investigate the risk of ASB among SCD patients at a tertiary hospital in Ghana. This was a cross-sectional study involving 110 SCD patients and 110 age and sex matched healthy controls...
February 15, 2017: Diseases (Basel)
https://www.readbyqxmd.com/read/28932402/comparative-study-of-sickle-cell-anemia-and-hemoglobin-sc-disease-clinical-characterization-laboratory-biomarkers-and-genetic-profiles
#2
Milena Magalhães Aleluia, Teresa Cristina Cardoso Fonseca, Regiana Quinto Souza, Fábia Idalina Neves, Caroline Conceição da Guarda, Rayra Pereira Santiago, Bruna Laís Almeida Cunha, Camylla Villas Boas Figueiredo, Sânzio Silva Santana, Silvana Sousa da Paz, Júnia Raquel Dutra Ferreira, Bruno Antônio Veloso Cerqueira, Marilda de Souza Gonçalves
BACKGROUND: In this study, we evaluate the association of different clinical profiles, laboratory and genetic biomarkers in patients with sickle cell anemia (SCA) and hemoglobin SC disease (HbSC) in attempt to characterize the sickle cell disease (SCD) genotypes. METHODS: We conducted a cross-sectional study from 2013 to 2014 in 200 SCD individuals (141 with SCA; 59 with HbSC) and analyzed demographic data to characterize the study population. In addition, we determined the association of hematological, biochemical and genetic markers including the β(S)-globin gene haplotypes and the 3...
2017: BMC Hematology
https://www.readbyqxmd.com/read/28931524/degree-of-anemia-indirect-markers-of-hemolysis-and-vascular-complications-of-sickle-cell-disease-in-africa
#3
Marie Dubert, Jacques Elion, Aissata Tolo, Dapa Aly Diallo, Saliou Diop, Ibrahima Diagne, Ibrahima Sanogo, Suzanne Belinga, Odette Guifo, Guillaume Wamba, Françoise Ngo Sack, Kouakou Boidy, Ismael Kamara, Youssouf Traore, Cheick Oumar Diakite, Valérie Gbonon, Blaise Felix Faye, Moussa Seck, Indou Deme Ly, David Chelo, Roland N'Guetta, Ibrahima Bara Diop, Bamba Gaye, Xavier Jouven, Brigitte Ranque
The hyperhemolysis paradigm that describes overlapping "hyperhemolytic-endothelial dysfunction" and "high hemoglobin-hyperviscous" subphenotypes of sickle cell disease (SCD) patients is based on North American studies. We performed a transversal study nested in the CADRE cohort to analyze the association between steady-state hemolysis and vascular complications of SCD among sub-Saharan African patients. In Mali, Cameroon, and Ivory Coast, 2,407 SCD patients (1,751 SS-Sβ(0), 495 SC and 161 Sβ(+)), aged three years old and over, were included at steady-state...
September 20, 2017: Blood
https://www.readbyqxmd.com/read/28928607/speckle-tracking-evaluation-of-right-ventricular-functions-in-children-with-sickle-cell-disease
#4
Osama Abd Rab Elrasol Tolba, Mohamed Ramadan El-Shanshory, Mohamed Abd Elaziz El-Gamasy, Walid Ahmed El-Shehaby
BACKGROUND: Cardiac dysfunction is a risk factor for death in patients with sickle cell disease (SCD). AIM OF THE WORK: Aim of the work is to evaluate the right ventricular systolic and diastolic functions by tissue Doppler and speckling tracking imaging in children with SCD. SUBJECTS AND METHODS: Thirty children with SCD and thirty controls were subjected to clinical, laboratory evaluations, and echocardiographic study using GE Vivid 7 (GE Medical System, Horten, Norway with a 3...
September 2017: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/28928241/vital-exhaustion-and-sudden-cardiac-death-in-the-atherosclerosis-risk-in-communities-study
#5
Brittany M Bogle, Nona Sotoodehnia, Anna M Kucharska-Newton, Wayne D Rosamond
OBJECTIVE: Vital exhaustion (VE), a construct defined as lack of energy, increased fatigue and irritability, and feelings of demoralisation, has been associated with cardiovascular events. We sought to examine the relation between VE and sudden cardiac death (SCD) in the Atherosclerosis Risk in Communities (ARIC) Study. METHODS: The ARIC Study is a predominately biracial cohort of men and women, aged 45-64 at baseline, initiated in 1987 through random sampling in four US communities...
September 19, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28927633/the-use-of-mri-to-monitor-iron-overload-in-scd
#6
John C Wood
No abstract text is available yet for this article.
September 6, 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28925802/higher-prevalence-of-spontaneous-cerebral-vasculopathy-and-cerebral-infarcts-in-a-mouse-model-of-sickle-cell-disease
#7
Hyacinth I Hyacinth, Courtney L Sugihara, Thomas L Spencer, David R Archer, Andy Y Shih
Stroke is a dramatic complication of sickle cell disease (SCD), which is associated with cerebral vasculopathies including moya moya, intravascular thrombi, cerebral hyperemia, and increased vessel tortuosity. The spontaneous occurrence of these pathologies in the sickle cell mouse model has not been described. Here, we studied Townes humanized sickle cell and age-matched control mice that were 13 months old. We used in vivo two-photon microscopy to assess blood flow dynamics, vascular topology, and evidence of cerebral vasculopathy...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28924974/incidence-and-predictive-score-for-delayed-hemolytic-transfusion-reaction-in-adult-patients-with-sickle-cell-disease
#8
David Narbey, Anoosha Habibi, Philippe Chadebech, Armand Mekontso-Dessap, Mehdi Khellaf, Jean-Daniel Lelièvre, Bertrand Godeau, Marc Michel, Frédéric Galactéros, Rachid Djoudi, Pablo Bartolucci, France Pirenne
Delayed hemolytic transfusion reaction (DHTR) is a life-threatening complication of transfusion in sickle cell disease (SCD). The frequency of DHTR is underestimated because its symptoms mimic those of vaso-occlusive crisis and antibodies (Abs) are often not detectable. No predictive factors for identifying patients likely to develop DHTR have yet been defined. We conducted a prospective single-center observational study over 30 months in adult sickle cell patients. We included 694 transfusion episodes (TEs) in 311 patients, divided into occasional TEs (OTEs: 360) and chronic transfusion program (CTEs: 334)...
September 19, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28924007/multiple-signaling-pathways-coordinately-regulate-forgetting-of-olfactory-adaptation-through-control-of-sensory-responses-in-c-elegans
#9
Tomohiro Kitazono, Sayuri Hara-Kuge, Osamu Matsuda, Akitoshi Inoue, Manabi Fujiwara, Takeshi Ishihara
Forgetting memories is important for animals to properly respond to continuously changing environments. To elucidate the mechanisms of forgetting, we used one of the behavioral plasticities of C. elegans hermaphrodite, olfactory adaptation to an attractive odorant, diacetyl, as a simple model of learning. In C. elegans, the TIR-1/JNK-1 pathway accelerates forgetting of olfactory adaptation by facilitating neural secretion from AWC sensory neurons. In this study, to identify the downstream effectors of the TIR-1/JNK-1 pathway, we conducted a genetic screen for suppressors of the gain-of-function mutant of tir-1 (ok1052), which shows excessive forgetting...
September 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28919773/sickle-cell-retinopathy-improving-care-with-a-multidisciplinary-approach
#10
REVIEW
Farid Menaa, Barkat Ali Khan, Bushra Uzair, Abder Menaa
Sickle cell retinopathy (SCR) is the most representative ophthalmologic complication of sickle cell disease (SCD), a hemoglobinopathy affecting both adults and children. SCR presents a wide spectrum of manifestations and may even lead to irreversible vision loss if not properly diagnosed and treated at the earliest. Over the past decade, multidisciplinary research developments have focused upon systemic, genetic, and ocular risk factors of SCR, enabling the clinician to better diagnose and manage these patients...
2017: Journal of Multidisciplinary Healthcare
https://www.readbyqxmd.com/read/28919378/sudden-death-mechanisms-in-non-ischemic-cardiomyopathies-insights-gleaned-from-clinical-implantable-cardioverter-defibrillator-trials
#11
Benjamin A Steinberg, Siva K Mulpuru, James C Fang, Bernard J Gersh
Sudden cardiac death (SCD) represents a major cause of death among patients with heart failure. While scar-based, macro-reentrant ventricular tachycardia and ventricular fibrillation (VT/VF) is the primary etiology for SCD among patients with ischemic cardiomyopathy, a more diverse set of mechanisms and substrates are likely at play for the diverse group of patients characterized by non-ischemic, dilated cardiomyopathy (NICM). These causes may include scar-based re-entry, but also neurohormonal stimulation (sympathetic, parasympathetic, renin-angiotensin-aldosterone), inflammation, and non-arrhythmic processes occurring in the context of a genetic predisposition...
September 14, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28917093/molecular-cloning-and-functional-expression-of-the-k-channel-kv7-1-and-the-regulatory-subunit-kcne1-from-equine-myocardium
#12
Philip J Pedersen, Kirsten B Thomsen, Jon B Flak, Maria A Tejada, Frank Hauser, Dagmar Trachsel, Rikke Buhl, Theodore Kalbfleisch, Michael Scott DePriest, James N MacLeod, Kirstine Calloe, Dan A Klaerke
BACKGROUND: The voltage-gated K(+)-channel KV7.1 and the subunit KCNE1, encoded by the KCNQ1 and KCNE1 genes, respectively, are responsible for termination of the cardiac action potential. In humans, mutations in these genes can predispose patients to arrhythmias and sudden cardiac death (SCD). AIM: To characterize equine KV7.1/KCNE1 currents and compare them to human KV7.1/KCNE1 currents to determine whether KV7.1/KCNE1 plays a similar role in equine and human hearts...
September 11, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28911514/defibrillation-for-ventricular-fibrillation-a-shocking-update
#13
REVIEW
Graham Nichol, Michael R Sayre, Federico Guerra, Jeanne Poole
Cardiac arrest is defined as the termination of cardiac activity associated with loss of consciousness, of spontaneous breathing, and of circulation. Sudden cardiac arrest and sudden cardiac death (SCD) are terms often used interchangeably. Most patients with out-of-hospital cardiac arrest have shown coronary artery disease or symptoms during the hour before the event. Cardiac arrest is potentially reversible by cardiopulmonary resuscitation, defibrillation, cardioversion, cardiac pacing, or treatments targeted at the underlying disease (e...
September 19, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28910308/pulmonary-hypertension-among-5-to-18-year-old-children-with-sickle-cell-anaemia-in-nigeria
#14
Ogochukwu J Sokunbi, Ekanem N Ekure, Edamisan O Temiye, Roosevelt Anyanwu, Christy A N Okoromah
BACKGROUND: Pulmonary hypertension (PHT) is a significant cause of mortality in patients with sickle cell disease (SCD). Few studies on PHT in SCD have been carried out in children. This study aimed to estimate the prevalence of PHT in children with sickle cell anaemia (SCA) and determine its clinical and laboratory correlates. METHODS: In this cross sectional study, evaluation involved obtaining bio-data, history and physical examination findings in 175 SCA subjects with haemoglobin genotype SS aged 5 to 18 years and 175 age and sex matched controls with haemoglobin genotype AA...
2017: PloS One
https://www.readbyqxmd.com/read/28906107/concepts-and-methods-of-solid-state-nmr-spectroscopy-applied-to-biomembranes
#15
Trivikram R Molugu, Soohyun Lee, Michael F Brown
Concepts of solid-state NMR spectroscopy and applications to fluid membranes are reviewed in this paper. Membrane lipids with (2)H-labeled acyl chains or polar head groups are studied using (2)H NMR to yield knowledge of their atomistic structures in relation to equilibrium properties. This review demonstrates the principles and applications of solid-state NMR by unifying dipolar and quadrupolar interactions and highlights the unique features offered by solid-state (2)H NMR with experimental illustrations. For randomly oriented multilamellar lipids or aligned membranes, solid-state (2)H NMR enables direct measurement of residual quadrupolar couplings (RQCs) due to individual C-(2)H-labeled segments...
September 14, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28905692/the-emerging-challenge-of-optimal-blood-pressure-management-and-hypertensive-syndromes-in-pregnant-women-with-sickle-cell-disease-a-review
#16
Nabilah F Lari, Michael R DeBaun, Samuel A Oppong
Sickle cell disease (SCD) is the most common hemoglobinopathy, affecting a considerable proportion of black populations of African origin, Middle East and in the Indian sub-continent. Women with SCD are more likely to experience adverse pregnancy and delivery outcomes. Hypertensive diseases in pregnancy such as preeclampsia and eclampsia are more common in women with sickle cell disease. Areas covered: This review examined the influence of hypertension and SCD in pregnancy, and provides the preliminary evidence that the traditional systolic and diastolic blood pressure thresholds for hypertensive disorders such as pre-eclampsia and eclampsia may require reassessment in pregnant women with SCD...
September 14, 2017: Expert Review of Hematology
https://www.readbyqxmd.com/read/28905364/a-clinical-risk-score-for-pulmonary-artery-thrombosis-during-acute-chest-syndrome-in-adult-patients-with-sickle-cell-disease
#17
Anaïs Winchenne, Jérôme Cecchini, Jean-François Deux, Nicolas De Prost, Keyvan Razazi, Guillaume Carteaux, Frederic Galacteros, Anoosha Habibi, Pablo Bartolucci, Giovanna Melica, Mehdi Khellaf, Marc Michel, Bernard Maitre, Armand Mekontso Dessap
Pulmonary artery thrombosis (PAT) is involved in lung vascular dysfunction during acute chest syndrome (ACS) complicating sickle cell disease (SCD). No clinical score is available to identify patients eligible for multi-detector computed tomography (MDCT) angiography during ACS. This retrospective study aimed to develop a risk score for PAT during ACS (PAT-ACS risk score). Patients with SCD were investigated by MDCT during ACS. A logistic regression was performed to determine independent risks factors for PAT and to build the PAT-ACS risk score...
September 14, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28904831/sagittal-normal-limits-of-lumbosacral-spine-in-a-large-adult-population-a-quantitative-magnetic-resonance-imaging-analysis
#18
Antonio Pierro, Savino Cilla, Giuseppina Maselli, Eleonora Cucci, Matteo Ciuffreda, Giuseppina Sallustio
OBJECTIVES: The objective of this study was to determine, using magnetic resonance imaging (MRI) of the lumbosacral spine from L1 to S1, the values of the normal sagittal diameter of the spinal canal (SCD), sagittal diameter of the dural sac (DSD), and the normal values of dural sac ratio (DSR) in a large nonsymptomatic adult population and to discriminate whether a vertebral canal is pathological or nonpathological for dural ectasia and/or stenosis. MATERIALS AND METHODS: Six hundred and four patients were prospectively enrolled...
2017: Journal of Clinical Imaging Science
https://www.readbyqxmd.com/read/28903763/troponin-as-ischemic-biomarker-is-related-with-all-three-echocardiographic-risk-factors-for-sudden-death-in-hypertrophic-cardiomyopathy-esc-guidelines-2014
#19
Rafał Hładij, Renata Rajtar-Salwa, Paweł Petkow Dimitrow
BACKGROUND: Sudden cardiac death (SCD) risk stratification is the most important preventive action in patients with hypertrophic cardiomyopathy (HCM). The identification of the ischemia biomarker high sensitive troponin I (hs-TnI) role for this arrhythmic disease may provide additional information for SCD risk stratification. The aim of the study was to compare echocardiographic parameters (prognostic for risk stratification of SCD in HCM) among two subgroups of HCM patients: with elevated hs-TnI versus non-elevated hs-TnI level...
September 13, 2017: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28902183/patient-characteristics-affect-the-response-to-ketamine-and-opioids-during-the-treatment-of-vaso-occlusive-episode-related-pain-in-sickle-cell-disease
#20
Raissa Nobrega, Kathy A Sheehy, Caroline Lippold, Amy L Rice, Julia C Finkel, Zenaide M N Quezado
BackgroundN-methyl-D-aspartate receptor activation has been implicated in the pathobiology of inflammatory, nociceptive and neuropathic pain, opioid tolerance, opioid-induced hyperalgesia, and central sensitization. Some of those mechanisms underlie sickle cell disease(SCD)-associated pain.MethodsWe conducted an exploratory cohort study of SCD patients who during vaso-occlusive episodes (VOEs) received subanesthetic doses of the N-methyl-D-aspartate receptor antagonist, ketamine, as an adjunct to opioids. We sought to identify predictors of changes in pain scores and of the percentage of ketamine infusions associated with meaningful changes (≥20% reduction) in pain and opioid consumption...
September 13, 2017: Pediatric Research
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