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Antonio La Gioia, Maurizio Fumi, Fabiana Fiorini, Paola Pezzati, Fiamma Balboni, Maria Bombara, Alessandra Marini, Ylenia Pancione, Leonardo Solarino, Elisa Marchese, Silvia Sale, Vincenzo Rocco, Marcello Fiorini
AIMS: The presence of cold agglutinin in blood samples can cause a spontaneous agglutination of red blood cells (RBCs) when low temperature occurs. This phenomenon causes a spurious lowering of RBC count on the automated haematological analysers that are detected by incongruous values (≥370 g/L) of the mean cellular haemoglobi concentration (MCHC). A preheating at 37°C can remove the RBC agglutination generally resulting in a reliable count. It has been reported that the same result can be reached by using the optical reticulocyte (RET) channel of Sysmex analysers where the RBC count is not influenced by the presence of cold agglutinin...
March 13, 2018: Journal of Clinical Pathology
Samuel Romero, Amparo Sempere, Inés Gómez-Seguí, Elena Román, Andrés Moret, Rosa Jannone, Iván Moreno, Santiago Mendizábal, Jordi Espí, Ana Peris, Rafael Carbonell, José Cervera, Javier Pemán, Santiago Bonanad, Javier de la Rubia, Isidro Jarque
BACKGROUND AND AIM: The term thrombotic microangiopathy (TMA) involves a heterogeneous group of diseases that can be overwhelming or invalidating, with an acute development, characterised by microangiopathic haemolytic anaemia and thrombocytopaenia. Its management during its initial hours is essential to improving the prognostic of these patients. The aim of this review is to give recommendations about the optimisation of TMA initial treatment and to accelerate the aetiological diagnosis...
March 10, 2018: Medicina Clínica
Krista Vaht, Magnus Göransson, Kristina Carlson, Cecilia Isaksson, Stig Lenhoff, Anna Sandstedt, Bertil Uggla, Jacek Winiarski, Per Ljungman, Mats Brune, Per-Ola Andersson
OBJECTIVES: Antithymocyte globulin (ATG)-based immunosuppression remains a cornerstone in aplastic anaemia (AA) treatment. However, most ATG studies are not population-based and knowledge about real-world results concerning response and outcome could offer important information for treating physicians. METHODS: We have recently performed a nationwide retrospective cohort study on all AA patients diagnosed in Sweden in 2000-2011 and now present treatment and outcome data on patients receiving first-line ATG...
March 12, 2018: European Journal of Haematology
Karthigayan Gunalan, Amadou Niangaly, Mahamadou A Thera, Ogobara K Doumbo, Louis H Miller
Plasmodium vivax is the main cause of malarial disease in Asia and South America. Plasmodium vivax infection was thought to be absent in African populations who are Duffy blood group antigen negative (Duffy-negative). However, many cases of P. vivax infection have recently been observed in Duffy-negative Africans. This raises the question: were P. vivax infections in Duffy-negative populations previously missed or has P. vivax adapted to infect Duffy-negative populations? This review focuses on recent P. vivax findings in Africa and reports views on the parasite ligands that may play a role in Duffy-negative P...
March 9, 2018: Trends in Parasitology
Zhen-Hong Zhang, Ming Ni, Yuan Hu
OBJECTIVE: To investigate the current status of vitamin A deficiency in preschool children in Dongguan, China, as well as the effect of vitamin A on serum ferritin, red blood cell, and reticulocyte parameters. METHODS: Cluster sampling was performed from April 2015 to December 2016 to select 2 085 preschool children (3-6 years old) without any disease in Dongguan. Routine blood test, reticulocyte count, serum ferritin measurement, hemoglobin electrophoresis, and vitamin A measurement were performed for all children...
March 2018: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
Vishnu Vardhan Garla, Sohail Abdul Salim, Licy L Yanes-Cardozo
A 27-year-old male patient who presented to the emergency room with complaints of sweating, palpitations, heat intolerance, insomnia and weight loss for the last 3 months. His medical history was significant for hypertension. On examination, he was tachycardic, hypertensive, had tremors of the upper extremities and a smooth goitre with a thyroid bruit. Laboratory assessment revealed a suppressed thyroid-stimulating hormone, high free thyroxine and positive thyroid receptor antibodies. Complete blood count showed pancytopenia...
March 9, 2018: BMJ Case Reports
Vyacheslav Buko, Ilya Zavodnik, Olena Kanuka, Elena Belonovskaya, Elena Naruta, Oxana Lukivskaya, Siargej Kirko, Grazyna Budryn, Danuta Żyżelewicz, Joanna Oracz, Natalia Sybirna
The protective effect of red cabbage extract (RCE) was evaluated in rats with streptozotocin-induced diabetes, assessing a probable role of this extract in the prevention of erythrocyte impairments associated with a high risk of vascular complications in diabetes. RCE was analyzed by ultrahigh performance liquid chromatography and mass spectrometry, and 11 anthocyanins, 3 hydroxybenzoic acids and 9 hydroxycinnamic acids were identified. Type 1 diabetes was induced by streptozotocin (60 mg kg-1 ) in Wistar male rats (n = 8 per group)...
March 8, 2018: Food & Function
Jill R Cherry-Bukowiec, Milo Engoren, Arek Wiktor, Krishnan Raghavendran, Lena M Napolitano
OBJECTIVE: Because anemia of inflammation is common in ICU patients and hepcidin is the key regulator of iron homeostasis, we examined time-dependent changes in hepcidin, erythropoietin, iron, and inflammatory markers in surgical ICU patients with anemia. DESIGN: Prospective single-center clinical noninterventional study. SETTING: Surgical ICUs; U.S. university hospital. PATIENTS: One hundred surgical adult ICU patients...
March 6, 2018: Critical Care Medicine
Neha Thakre, Priyanka Fernandes, Ann-Kristin Mueller, Frederik Graw
The blood-stage of the Plasmodium parasite is one of the key phases within its life cycle that influences disease progression during a malaria infection. The efficiency of the parasite in infecting red blood cells (RBC) determines parasite load and parasite-induced hemolysis that is responsible for the development of anemia and potentially drives severe disease progression. However, the molecular factors defining the infectivity of Plasmodium parasites have not been completely identified so far. Using the Plasmodium berghei mouse model for malaria, we characterized and compared the blood-stage infection dynamics of Pb ANKA WT and a mutant parasite strain lacking a novel Plasmodium antigen, Pb maLS_05, that is well conserved in both human and animal Plasmodium parasite strains...
2018: Frontiers in Microbiology
Jakob Pugi, Manuel Carcao, Luke J Drury, Jacob C Langer
BACKGROUND: Laparoscopic partial splenectomy (LPS) theoretically maintains long-term splenic immune function for children with hereditary spherocytosis (HS). Our goal was to review our results after LPS and to determine if specific genetic mutations influence outcome. METHODS: All children with HS undergoing LPS between 2005 and 2016 were reviewed. RESULTS: Thirty-one children underwent LPS (16 male) at a median age of 9 (range 2-18) years...
February 8, 2018: Journal of Pediatric Surgery
Leen Vandermosten, Thao-Thy Pham, Hendrik Possemiers, Sofie Knoops, Evelien Van Herck, Julie Deckers, Blandine Franke-Fayard, Tracey J Lamb, Chris J Janse, Ghislain Opdenakker, Philippe E Van den Steen
BACKGROUND: Malaria-associated acute respiratory distress syndrome (MA-ARDS) is a complication of malaria with a lethality rate of up to 80% despite anti-malarial treatment. It is characterized by a vast infiltration of leukocytes, microhaemorrhages and vasogenic oedema in the lungs. Previously, a mouse model for MA-ARDS was developed by infection of C57BL/6 mice with the Edinburgh line NK65-E of Plasmodium berghei. RESULTS: Here, both host and parasite factors were demonstrated to play crucial roles in the development and severity of lung pathology...
March 5, 2018: Malaria Journal
Angela E Rankine-Mullings, Nadine Morrison-Levy, Deanne Soares, Karen Aldred, Lesley King, Susanna Ali, Jennifer M Knight-Madden, Margaret Wisdom-Phipps, Robert J Adams, Russell E Ware, Marvin Reid
This study investigated the association of nutritional and haematological variables with maximum time-averaged mean velocity (TAMV) measured by transcranial Doppler (TCD) velocity and the agreement of classification between two protocols. TCD categories included: normal (<170 cm/s), conditional (170-199 cm/s) and abnormal (≥200 cm/s) based on TAMV in distal internal carotid artery (dICA), middle cerebral artery (MCA), internal carotid bifurcation, anterior and posterior cerebral arteries. Of 358 children with sickle cell anaemia (SCA) examined, the mean age (±standard deviation) was 7·4 ± 2·7 years; 13·1% and 6·7% had conditional and abnormal velocities, respectively...
March 5, 2018: British Journal of Haematology
Ulrike Böhme, Thomas D Otto, James Cotton, Sascha Steinbiss, Mandy Sanders, Samuel O Oyola, Antoine Nicot, Sylvain Gandon, Kailash P Patra, Colin Herd, Ellen Bushell, Katarzyna K Modrzynska, Oliver Billker, Joseph M Vinetz, Ana Rivero, Chris I Newbold, Matthew Berriman
Avian malaria parasites are prevalent around the world, and infect a wide diversity of bird species. Here we report the sequencing and analysis of high quality draft genome sequences for two avian malaria species, Plasmodium relictum and Plasmodium gallinaceum We identify 50 genes that are specific to avian malaria, located in an otherwise conserved core of the genome that shares gene synteny with all other sequenced malaria genomes. Phylogenetic analysis suggests that the avian malaria species form an outgroup to the mammalian Plasmodium species and using amino acid divergence between species, we estimate the avian and mammalian-infective lineages diverged in the order of 10 million years ago...
March 2, 2018: Genome Research
Maritza Bermúdez, Gabriela Arévalo-Pinzón, Laura Rubio, Olivier Chaloin, Sylviane Muller, Hernando Curtidor, Manuel Alfonso Patarroyo
Elucidating receptor-ligand and protein-protein interactions represents an attractive alternative for designing effective Plasmodium vivax control methods. This article describes the ability of P. vivax rhoptry neck proteins 2 and 4 (RON2 and RON4) to bind to human reticulocytes. Biochemical and cellular studies have shown that two PvRON2- and PvRON4-derived conserved regions specifically interact with protein receptors on reticulocytes marked by the CD71 surface transferrin receptor. Mapping each protein fragment's binding region led to defining the specific participation of two 20 amino acid-long regions selectively competing for PvRON2 and PvRON4 binding to reticulocytes...
February 27, 2018: Cellular Microbiology
L Tauzin, V Campos, M Tichet
Reticulocytes and erythrocytes are the ultimate differentiated stages of erythropoiesis. In addition to being anucleate cells, they are characterized by the clearance of their mitochondrial pool or lack thereof. Given that for most research-oriented flow cytometry experiments erythrocytes and reticulocytes are often undesirable cell types, their identification and exclusion from analyses can be essential. Here, we describe a flow cytometric method based on cellular NAD(P)H-related autofluorescence, whose localization is mainly associated with mitochondria...
February 26, 2018: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
Nil Gural, Liliana Mancio-Silva, Alex B Miller, Ani Galstian, Vincent L Butty, Stuart S Levine, Rapatbhorn Patrapuvich, Salil P Desai, Sebastian A Mikolajczak, Stefan H I Kappe, Heather E Fleming, Sandra March, Jetsumon Sattabongkot, Sangeeta N Bhatia
The unique relapsing nature of Plasmodium vivax infection is a major barrier to malaria eradication. Upon infection, dormant liver-stage forms, hypnozoites, linger for weeks to months and then relapse to cause recurrent blood-stage infection. Very little is known about hypnozoite biology; definitive biomarkers are lacking and in vitro platforms that support phenotypic studies are needed. Here, we recapitulate the entire liver stage of P. vivax in vitro, using a multiwell format that incorporates micropatterned primary human hepatocyte co-cultures (MPCCs)...
February 6, 2018: Cell Host & Microbe
S J X Murphy, S T Lim, J A Kinsella, D Murphy, H M Enright, Dominick J H McCabe
BACKGROUND: The pathophysiological mechanisms responsible for the disparity in stroke risk between asymptomatic and symptomatic carotid stenosis patients are not fully understood. The functionally important reticulated platelet fraction and reticulocytes could play a role. OBJECTIVES: We performed a prospective, multi-centre, observational analytical study comparing full blood count parameters and platelet production/turnover/activation markers in patients with asymptomatic versus recently symptomatic moderate (≥ 50-69%) or severe (≥ 70-99%) carotid stenosis...
February 23, 2018: Journal of Neurology
Anu Aggarwal, Manu Jamwal, Ganesh Kumar V, Prashant Sharma, Man Updesh Singh Sachdeva, Deepak Bansal, Pankaj Malhotra, Reena Das
Reference genes are indispensable for normalizing mRNA levels across samples in real-time quantitative PCR. Their expression levels vary under different experimental conditions and due to several inherent characteristics. Appropriate reference gene selection is thus critical for gene-expression studies. This study aimed at selecting optimal reference genes for gene-expression analysis of reticulocytes and validating them in hereditary spherocytosis (HS) and β-thalassemia intermedia (βTI) patients. Seven reference genes (PGK1, MPP1, HPRT1, ACTB, GAPDH, RN18S1, and SDHA) were selected from published literature...
February 20, 2018: Journal of Molecular Diagnostics: JMD
Parminder K Ajji, Shailendra P Sonkar, Ken Walder, Munish Puri
Balsamin, a type I ribosome-inactivating protein (RIP), has been shown to inhibit HIV-1 replication at the translation step. Our recent studies have shown that balsamin also possess anti-tumor, antibacterial and DNase-like activity, however, the amount of natural balsamin in Momordica balsamina seeds is limited and preclinical studies require large quantities of pure, bioactive balsamin. Therefore, in this study, we cloned the balsamin gene, expressed it in E. coli BL21(DE3) strain and purified it by nickel affinity chromatography...
February 19, 2018: International Journal of Biological Macromolecules
Paul Robach, Joar Hansen, Aurélien Pichon, Anne-Kristine Meinild Lundby, Sune Dandanell, Gunnar Slettaløkken Falch, Daniel Hammarström, Dominik H Pesta, Christoph Siebenmann, Stefanie Keiser, Patricia Kérivel, Jon Elling Whist, Bent R Rønnestad, Carsten Lundby
Live high - train low (LHTL) using hypobaric hypoxia was previously found to improve sea-level endurance performance in well-trained individuals, however confirmatory controlled data in athletes are lacking. Here we test the hypothesis that natural-altitude LHTL improves aerobic performance in cross-country skiers, in conjunction with expansion of total hemoglobin mass (Hbmass , carbon-monoxide rebreathing technique) promoted by accelerated erythropoiesis. Following duplicate baseline measurements at sea level over the course of two weeks, nineteen Norwegian cross-country skiers (three women, sixteen men, age 20±2 yr, maximal oxygen uptake (VO2 max) 69±5 ml...
February 22, 2018: Scandinavian Journal of Medicine & Science in Sports
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