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https://www.readbyqxmd.com/read/28548651/foetal-haemoglobin-blood-transfusion-and-retinopathy-of-prematurity-in-very-preterm-infants-a-pilot-prospective-cohort-study
#1
C J Stutchfield, A Jain, D Odd, C Williams, R Markham
PurposeTo identify if there is an association between foetal haemoglobin (HbF) concentration and retinopathy of prematurity (ROP) in very preterm infants.Patients and methodsProspective cohort study. Infants born <32 weeks' gestational age or <1501 g in two tertiary neonatal units between January 2012 and May 2013 (n=42) were enrolled. HbF and adult haemoglobin (HbA) concentrations were measured using high-pressure liquid chromatography from blood samples sent as part of routine neonatal care once routinely requested laboratory tests had been performed...
May 26, 2017: Eye
https://www.readbyqxmd.com/read/28548390/a-step-towards-removing-plasma-volume-variance-from-the-athlete-s-biological-passport-the-use-of-biomarkers-to-describe-vascular-volumes-from-a-simple-blood-test
#2
Louisa M Lobigs, Pierre-Edouard Sottas, Pitre C Bourdon, Zoran Nikolovski, Mohamed El-Gingo, Evdokia Varamenti, Peter Peeling, Brian Dawson, Yorck O Schumacher
The haematological module of the Athlete's Biological Passport (ABP) has significantly impacted the prevalence of blood manipulations in elite sports. However, the ABP relies on a number of concentration-based markers of erythropoiesis, such as haemoglobin concentration ([Hb]), which are influenced by shifts in plasma volume (PV). Fluctuations in PV contribute to the majority of biological variance associated with volumetric ABP markers. Our laboratory recently identified a panel of common chemistry markers (from a simple blood test) capable of describing ~67% of PV variance, presenting an applicable method to account for volume shifts within antidoping practices...
May 26, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28547651/photoplethysmography-for-blood-volumes-and-oxygenation-changes-during-intermittent-vascular-occlusions
#3
T Y Abay, P A Kyriacou
Photoplethysmography (PPG) is an optical technique that measures blood volume variations. The main application of dual-wavelength PPG is pulse oximetry, in which the arterial oxygen saturation (SpO[Formula: see text]) is calculated noninvasively. However, the PPG waveform contains other significant physiological information that can be used in conjunction to SpO[Formula: see text] for the assessment of oxygenation and blood volumes changes. This paper investigates the use of near infrared spectroscopy (NIRS) processing techniques for extracting relative concentration changes of oxygenated ([Formula: see text]HbO[Formula: see text]), reduced ([Formula: see text]HHb) and total haemoglobin ([Formula: see text]tHb) from dual-wavelength PPG signals during intermittent pressure-increasing vascular occlusions...
May 25, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28547590/perfusion-and-diffusion-mri-signatures-in-histologic-and-genetic-subtypes-of-who-grade-ii-iii-diffuse-gliomas
#4
Kevin Leu, Garrett A Ott, Albert Lai, Phioanh L Nghiemphu, Whitney B Pope, William H Yong, Linda M Liau, Timothy F Cloughesy, Benjamin M Ellingson
The value of perfusion and diffusion-weighted MRI in differentiating histological subtypes according to the 2007 WHO glioma classification scheme (i.e. astrocytoma vs. oligodendroglioma) and genetic subtypes according to the 2016 WHO reclassification (e.g. 1p/19q co-deletion and IDH1 mutation status) in WHO grade II and III diffuse gliomas remains controversial. In the current study, we describe unique perfusion and diffusion MR signatures between histological and genetic glioma subtypes. Sixty-five patients with 2007 histological designations (astrocytomas and oligodendrogliomas), 1p/19q status (+ = intact/- = co-deleted), and IDH1 mutation status (MUT/WT) were included in this study...
May 25, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28547129/quantitative-analysis-of-dynamic-18-f-fdg-pet-ct-for-measurement-of-lung-inflammation
#5
Christopher Coello, Marie Fisk, Divya Mohan, Frederick J Wilson, Andrew P Brown, Michael I Polkey, Ian Wilkinson, Ruth Tal-Singer, Philip S Murphy, Joseph Cheriyan, Roger N Gunn
BACKGROUND: An inflammatory reaction in the airways and lung parenchyma, comprised mainly of neutrophils and alveolar macrophages, is present in some patients with chronic obstructive pulmonary disease (COPD). Thoracic fluorodeoxyglucose ((18)F-FDG) positron emission tomography (PET) has been proposed as a promising imaging biomarker to assess this inflammation. We sought to introduce a fully quantitative analysis method and compare this with previously published studies based on the Patlak approach using a dataset comprising (18)F-FDG PET scans from COPD subjects with elevated circulating inflammatory markers (fibrinogen) and matched healthy volunteers (HV)...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28546330/exploring-new-multimodal-quantitative-imaging-indices-for-the-assessment-of-osseous-tumour-burden-in-prostate-cancer-using-68-ga-psma-pet-ct
#6
Marie Bieth, Markus Krönke, Robert Tauber, Marielena Dahlbender, Margitta Retz, Stephan G Nekolla, Bjoern Menze, Tobias Maurer, Matthias Eiber, Markus Schwaiger
Positron-emission-tomography (PET) combined with computed-tomography (CT) and prostate-specific-membrane-antigen (PSMA) ligands has gained significant interest for staging prostate cancer (PC). In this study, we propose two multimodal quantitative indices as imaging biomarker for the assessment of osseous tumour burden using (68)Ga-PSMA-PET/CT and present preliminary clinical data. We define two Bone-PET-Indices (BPI) that incorporate anatomical information from CT and functional information from (68)Ga-PSMA-PET: BPIVOL is the percental bone volume affected by tumour...
May 25, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28545978/benralizumab-for-patients-with-mild-to-moderate-persistent-asthma-bise-a-randomised-double-blind-placebo-controlled-phase-3-trial
#7
Gary T Ferguson, J Mark FitzGerald, Eugene R Bleecker, Michel Laviolette, David Bernstein, Craig LaForce, Lyndon Mansfield, Peter Barker, Yanping Wu, Maria Jison, Mitchell Goldman
BACKGROUND: Benralizumab is a humanised, anti-interleukin 5 receptor α monoclonal antibody that directly and rapidly depletes eosinophils, reduces asthma exacerbations, and improves lung function for patients with severe eosinophilic asthma. The objective of this trial was to assess the safety and efficacy of benralizumab for patients with mild to moderate, persistent asthma. METHODS: In this randomised, double-blind, placebo-controlled, phase 3 trial, we recruited patients aged 18-75 years, weighing at least 40 kg, and with a postbronchodilator reversibility in forced expiratory volume in 1 s (FEV1) of at least 12% at screening, from 52 clinical research centres in six countries...
May 22, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/28545858/hemocoagulase-combined-with-microbubble-enhanced-ultrasound-cavitation-for-augmented-ablation-of-microvasculature-in-rabbit-vx2-liver-tumors
#8
Qian Yang, Peng Tang, Guangbin He, Shuping Ge, Liwen Liu, Xiaodong Zhou
We investigated a new method for combining microbubble-enhanced ultrasound cavitation (MEUC) with hemocoagulase (HC) atrox. Our goal was to induce embolic effects in the vasculature and combine these with an anti-angiogenic treatment strategy. Fourteen days after being implanted with a single slice of the liver VX2 tumor, rabbits were randomly divided into five groups: (i) a control group injected intra-venously with saline using a micropump; (ii) a group given only an injection of HC; (iii) a group treated only with ultrasound cavitation; (iv) a group treated with MEUC; (v) a group treated with MEUC + HC...
May 22, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28545084/feasibility-study-of-tspo-quantification-with-18f-feppa-using-population-based-input-function
#9
Rostom Mabrouk, Antonio P Strafella, Dunja Knezevic, Christine Ghadery, Romina Mizrahi, Avideh Gharehgazlou, Yuko Koshimori, Sylvain Houle, Pablo Rusjan
PURPOSE: The input function (IF) is a core element in the quantification of Translocator protein 18 kDa with positron emission tomography (PET), as no suitable reference region with negligible binding has been identified. Arterial blood sampling is indeed needed to create the IF (ASIF). In the present manuscript we study individualization of a population based input function (PBIF) with a single arterial manual sample to estimate total distribution volume (VT) for [18F]FEPPA and to replicate previously published clinical studies in which the ASIF was used...
2017: PloS One
https://www.readbyqxmd.com/read/28544589/methionine-tumor-starvation-by-erythrocyte-encapsulated-methionine-gamma-lyase-activity-controlled-with-per-os-vitamin-b6
#10
Fabien Gay, Karine Aguera, Karine Sénéchal, Angie Tainturier, Willy Berlier, Delphine Maucort-Boulch, Jérôme Honnorat, Françoise Horand, Yann Godfrin, Vanessa Bourgeaux
Erymet is a new therapy resulting from the encapsulation of a methionine gamma-lyase (MGL; EC number 4.4.1.11) in red blood cells (RBC). The aim of this study was to evaluate erymet potential efficacy in methionine (Met)-dependent cancers. We produced a highly purified MGL using a cGMP process, determined the pharmacokinetics/pharmacodynamics (PK/PD) properties of erymet in mice, and assessed its efficacy on tumor growth prevention. Cytotoxicity of purified MGL was tested in six cancer cell lines. CD1 mice were injected with single erymet product supplemented or not with vitamin B6 vitamer pyridoxine (PN; a precursor of PLP cofactor)...
May 23, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28544427/advanced-consumable-free-morphological-analysis-of-intact-red-blood-cells-by-a-compact-scanning-flow-cytometer
#11
K V Gilev, E S Yastrebova, D I Strokotov, M A Yurkin, N A Karmadonova, A V Chernyshev, V V Lomivorotov, V P Maltsev
Whereas modern automated blood cell analyzers measure the volume of individual red blood cells (RBCs), leading to four RBC indices (mean corpuscular volume, MCV; mean corpuscular hemoglobin, MCH; mean corpuscular hemoglobin concentration, MCHC; red cell distribution width, and RDW), the RBC shape has not been assessed by clinical screening tools. We applied the scanning flow cytometer (SFC) for complete characterization of intact RBC morphology in terms of diameter, maximal and minimal thicknesses, volume, surface area, sphericity index, spontaneous curvature, hemoglobin concentration, and content...
May 19, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28544301/hospital-volume-and-perioperative-outcomes-for-radical-cystectomy-a-population-study
#12
Cristian Udovicich, Marlon Perera, Molla Huq, Lih-Ming Wong, Daniel Lenaghan
OBJECTIVES: To evaluate the association between hospital volume and perioperative outcomes of radical cystectomy (RC) using state population data for a contemporary Australian cohort. PATIENTS AND METHODS: Patients undergoing RC for urothelial malignancy in the state of Victoria, Australia between July 2003 and June 2014 were identified using the Victorian Admitted Episodes Dataset (VAED). Hospitals were divided into tertiles according to their caseload per year...
May 2017: BJU International
https://www.readbyqxmd.com/read/28543885/dce-mri-prediction-of-survival-time-for-patients-with-glioblastoma-multiforme-using-an-adaptive-neuro-fuzzy-based-model-and-nested-model-selection-technique
#13
Azimeh N V Dehkordi, Alireza Kamali-Asl, Ning Wen, Tom Mikkelsen, Indrin J Chetty, Hassan Bagher-Ebadian
This pilot study investigates the construction of an Adaptive Neuro-Fuzzy Inference System (ANFIS) for the prediction of the survival time of patients with glioblastoma multiforme (GBM). ANFIS is trained by the pharmacokinetic (PK) parameters estimated by the model selection (MS) technique in dynamic contrast enhanced-magnetic resonance imaging (DCE-MRI) data analysis, and patient age. DCE-MRI investigations of 33 treatment-naïve patients with GBM were studied. Using the modified Tofts model and MS technique, the following physiologically nested models were constructed: Model 1, no vascular leakage (normal tissue); Model 2, leakage without efflux; Model 3, leakage with bidirectional exchange (influx and efflux)...
May 25, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28543814/intra-and-interindividual-variability-of-fatty-acid-unsaturation-in-six-different-human-adipose-tissue-compartments-assessed-by-1-h-mrs-in-vivo-at-3%C3%A2-t
#14
Jürgen Machann, Norbert Stefan, Robert Wagner, Malte Bongers, Erwin Schleicher, Andreas Fritsche, Hans-Ulrich Häring, Konstantin Nikolaou, Fritz Schick
It is generally accepted that the amount and distribution of adipose tissue (AT) in the human body play an important role in the pathogenesis of metabolic diseases. In addition, metabolic effects of released saturated fatty acids (FAs) in blood are known to be more critical than those of unsaturated FAs. However, little is known about the variability in unsaturation of FAs in various AT compartments. The aim of this prospective study was the assessment of mono- and polyunsaturated FAs in various AT compartments by localized (1) H-MRS in order to obtain insight into the intra- and interindividual variability...
May 25, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28543387/the-hematocrit-affects-the-volume-of-plasma-treated-with-coupled-plasma-filtration-and-adsorption-with-predilution
#15
Stefano Finazzi, Elena Garbero, Giampietro Trussardi, Guido Bertolini
Coupled plasma filtration and adsorption (CPFA) is an extracorporeal blood purification technique proposed for the treatment of septic-shock. By removing pro- and anti-inflammatory mediators from plasma, CPFA is supposed to have a therapeutic effect on the abnormal inflammatory response seen in this condition. Recently, blood predilution with citrate solution has been adopted to prevent clotting in the CPFA circuit-one of the main problems of the technique. Taking into account the patient's hematocrit, we worked out a formula for the volume of plasma effectively treated by CPFA after predilution...
May 2017: Artificial Organs
https://www.readbyqxmd.com/read/28543084/population-pharmacokinetics-and-exposure-response-assessment-of-cc-292-a-potent-btk-inhibitor-in-patients-with-chronic-lymphocytic-leukemia
#16
Yan Li, Francisco Ramírez-Valle, Yongjun Xue, Judith I Ventura, Olivier Gouedard, Jay Mei, Kenichi Takeshita, Maria Palmisano, Simon Zhou
CC-292, a potent Bruton tyrosine kinase inhibitor, is under development for the treatment of B-cell malignancies. An analysis was performed to develop a population pharmacokinetic model of CC-292 and assess the influence of demographics and disease-related covariates on CC-292 exposure and to assess the exposure-response (overall response rate) relationship in patients with chronic lymphocytic leukemia. Population pharmacokinetic analysis was based on a 2-compartment base model conducted in NONMEM. Categorical exposure-response analysis was performed using logistic regression in SAS...
May 19, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28543052/norepinephrine-reduces-arterial-compliance-less-than-phenylephrine-when-treating-general-anesthesia-induced-arterial-hypotension
#17
F Vallée, O Passouant, A Le Gall, J Joachim, J Mateo, A Mebazaa, E Gayat
INTRODUCTION: During general anesthesia, arterial hypotension is frequent and may be an important contributor to perioperative morbidity. We assessed the effect of a 5 μg bolus of Norepinephrine (NA) when compared with 50 μg bolus of Phenylephrine (PE) administered to treat hypotension during maintenance anesthesia, on MAP, derived cardiac output and arterial stiffness parameters. METHODS: Patients scheduled for a neurosurgical procedure under general anesthesia were prospectively included...
May 22, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28543017/heart-heat-separation
#18
Willem J van der Laarse
The human heart requires a considerable amount of energy (10 W at rest to 100 W during exercise) for basal metabolism, activation processes and work to circulate blood (heart rate × stroke volume × arterial blood pressure). This article is protected by copyright. All rights reserved.
May 25, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28542926/effect-of-spironolactone-on-exercise-tolerance-and-arterial-function-in-older-adults-with-heart-failure-with-preserved-ejection-fraction
#19
Bharathi Upadhya, William G Hundley, Peter H Brubaker, Timothy M Morgan, Kathryn P Stewart, Dalane W Kitzman
OBJECTIVES: To evaluate the effects of an aldosterone antagonist on exercise intolerance in older adults with heart failure and preserved ejection fraction (HFpEF). DESIGN: Randomized, placebo-controlled, double-blind trial. SETTING: Academic medical center, Winston-Salem, North Carolina. PARTICIPANTS: Older adults (N = 80, aged 71 ± 1; 80% female) with stable compensated HFpEF and controlled blood pressure (BP)...
May 19, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28542801/serum-protein-binding-of-25-antiepileptic-drugs-in-a-routine-clinical-setting-a-comparison-of-free-non-protein-bound-concentrations
#20
Philip N Patsalos, Miguel Zugman, Charlotte Lake, Anthony James, Neville Ratnaraj, Josemir W Sander
OBJECTIVE: Given that only the free non-protein-bound concentration of an antiepileptic drug (AED) crosses the blood-brain barrier, entering the brain and producing an antiepileptic effect, knowledge and measurement of the free drug fraction is important. Such data are sparse, particularly for newer AEDs, and have arisen from the use of disparate methodologies and settings over the past six decades. We report on the protein binding of 25 AEDs that are available for clinical use, along with two pharmacologically active metabolites (carbamazepine-epoxide and N-desmethyl clobazam), using standardized methodology and under set conditions...
May 24, 2017: Epilepsia
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