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https://www.readbyqxmd.com/read/28526096/pvgama-reticulocyte-binding-activity-predicting-conserved-functional-regions-by-natural-selection-analysis
#1
Luis A Baquero, Darwin A Moreno-Pérez, Diego Garzón-Ospina, Johanna Forero-Rodríguez, Heidy D Ortiz-Suárez, Manuel A Patarroyo
BACKGROUND: Adhesin proteins are used by Plasmodium parasites to bind and invade target cells. Hence, characterising molecules that participate in reticulocyte interaction is key to understanding the molecular basis of Plasmodium vivax invasion. This study focused on predicting functionally restricted regions of the P. vivax GPI-anchored micronemal antigen (PvGAMA) and characterising their reticulocyte binding activity. RESULTS: The pvgama gene was initially found in P...
May 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28523522/vaccinia-virus-g1-protein-absence-of-autocatalytic-self-processing
#2
F G G Leite, A Bergthaler, T Skern
Vaccinia virus relies on a series of proteolytic cleavage events involving two viral proteins, I7 and G1, to complete its life cycle. Furthermore, G1 itself is cleaved during vaccinia virus infection. However, convincing evidence is lacking to show whether G1 participates in autoproteolysis or is a substrate of another protease. We employed both biochemical and cell-based approaches to investigate G1 cleavage. G1, when expressed in bacteria, rabbit reticulocyte lysates or HeLa cells, was not processed. Moreover, G1 was cleaved in infected cells, but only in the presence of virus late gene expression; cleavage was strongly inhibited by proteasome inhibitors...
May 18, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28522758/regulation-of-erythropoiesis-after-normoxic-return-from-chronic-sustained-and-intermittent-hypoxia
#3
Jihyun Song, Krishna Sundar, Radhika Gangaraju, Josef T Prchal
Hypoxia increases erythropoiesis mediated by hypoxia-inducible transcription factors (HIF) which regulate erythropoietin (EPO) transcription. Neocytolysis is a physiological mechanism that corrects polycythemia from chronic sustained hypoxemia (CSH) by transient, preferential destruction of young RBCs after normoxia is restored. We showed that neocytolysis is caused by excessive mitochondrial-derived reactive oxygen species (ROS) in reticulocytes mediated by down-regulation of HIF-controlled BNIP3L regulated mitophagy and a decrease in RBC antioxidant catalase (CAT) in hypoxia-produced erythrocytes...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28521840/characterising-pvrbsa-an-exclusive-protein-from-plasmodium-species-infecting-reticulocytes
#4
Darwin A Moreno-Pérez, Luis A Baquero, Diana M Chitiva-Ardila, Manuel A Patarroyo
BACKGROUND: Plasmodium vivax uses multiple ligand-receptor interactions for preferential invasion of human reticulocytes. Several of these ligands have been identified by in silico approaches based on the role displayed by their orthologs in other Plasmodium species during initial adhesion or invasion. However, the cell adhesion role of proteins that are exclusive to species that specifically invade reticulocytes (as P. vivax and P. cynomolgi) has not been evaluated to date. This study aimed to characterise an antigen shared between Plasmodium species that preferentially infect reticulocytes with a focus on assessing its binding activity to target cells...
May 18, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28515485/e-cigarettes-induce-toxicological-effects-that-can-raise-the-cancer-risk
#5
Donatella Canistro, Fabio Vivarelli, Silvia Cirillo, Clara Babot Marquillas, Annamaria Buschini, Mirca Lazzaretti, Laura Marchi, Vladimiro Cardenia, Maria Teresa Rodriguez-Estrada, Maura Lodovici, Caterina Cipriani, Antonello Lorenzini, Eleonora Croco, Silvia Marchionni, Paola Franchi, Marco Lucarini, Vincenzo Longo, Clara Maria Della Croce, Andrea Vornoli, Annamaria Colacci, Monica Vaccari, Andrea Sapone, Moreno Paolini
Electronic cigarettes (e-cigs) are devices designed to deliver nicotine in a vaping solution rather than smoke and without tobacco combustion. Perceived as a safer alternative to conventional cigarettes, e-cigs are aggressively marketed as lifestyle-choice consumables, thanks to few restrictions and a lack of regulatory guidelines. E-cigs have also gained popularity among never-smokers and teenagers, becoming an emergent public health issue. Despite the burgeoning worldwide consumption of e-cigs, their safety remains largely unproven and it is unknown whether these devices cause in vivo toxicological effects that could contribute to cancer...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28510276/canine-reticulocyte-hemoglobin-content-ret-he-in-different-types-of-iron-deficient-erythropoiesis
#6
Jannika Fuchs, Andreas Moritz, Esther Grußendorf, Jörg Lechner, Felix Neuerer, Rafael Nickel, Thomas Rieker, Claudia Schwedes, Dennis B DeNicola, James Russell, Natali Bauer
BACKGROUND: Reticulocyte hemoglobin content (RET-He) is a diagnostic marker for iron deficiency (ID) in people and dogs. OBJECTIVES: The aim of our study was to evaluate the clinical utility of RET-He in the diagnosis of different causes of iron-deficient erythropoiesis (IDE). METHODS: Canine CBCs were separated into 2 groups according to RET-He values, < 20.9 pg or ≥ 20.9 pg. Erythrocyte and reticulocyte variables were compared between dogs with decreased and normal RET-He values...
May 16, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28492741/effect-of-alox-15-polymorphism-on-gcf-levels-of-lipoxin-a4-in-chronic-periodontitis-a-preliminary-study
#7
Fouzia Tarannum, Mohamed Faizuddin
Lipoxins play an important role in periodontal resolution, hence, investigation of genetic polymorphism of lipoxin gene may provide important information on the role of lipoxins in periodontal disease pathogenesis. The aim of this study was to investigate a polymorphism of C-to-T substitution at position c.-292 in ALOX15 (reticulocyte-type 15 lipoxygenase 1) gene in patients with chronic periodontitis and to associate the polymorphism with gingival crevicular fluid (GCF) lipoxin A4 (LXA4) levels. Forty-five chronic periodontitis and 45 periodontally healthy patients were included in this case-control study...
March 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28482628/red-blood-cell-and-platelet-parameters-are%C3%A2-sepsis-predictors-in-an-escherichia-coli%C3%A2-induced-lethal-porcine-model
#8
Judit Tóth, Ildikó Beke Debreceni, Mariann Berhés, Endre Hajdú, Ádám Deák, Katalin Pető, Judit Szabó, Norbert Németh, Béla Fülesdi, János Kappelmayer
OBJECTIVE: In a fulminant porcine sepsis model, we determined the kinetics of hypoxia induced changes in relation to sepsis parameters and markers of organ damage. METHODS: Female pigs were challenged by live Escherichia coli and samples were analysed up to 4 hours. Bone marrow reactions were determined by analysing immature forms of peripheral blood cells by a hematology analyser and light microscopy. Platelet mitochondrial membrane depolarisation was determined by flow cytometry...
May 5, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28473932/acquired-thrombotic-thrombocytopenic-purpura-in-a-patient-with-pernicious-anemia
#9
Ramesh Kumar Pandey, Sumit Dahal, Kamal Fadlalla El Jack Fadlalla, Shambhu Bhagat, Bikash Bhattarai
Introduction. Acquired thrombotic thrombocytopenic purpura (TTP) has been associated with different autoimmune disorders. However, its association with pernicious anemia is rarely reported. Case Report. A 46-year-old male presented with blood in sputum and urine for one day. The vitals were stable. The physical examination was significant for icterus. Lab tests' results revealed leukocytosis, macrocytic anemia, severe thrombocytopenia, renal dysfunction, and unconjugated hyperbilirubinemia. He had an elevated LDH, low haptoglobin levels with many schistocytes, nucleated RBCs, and reticulocytes on peripheral smear...
2017: Case Reports in Hematology
https://www.readbyqxmd.com/read/28468320/evaluation-of-the-efficiency-of-the-reticulocyte-hemoglobin-content-on-diagnosis-for-iron-deficiency-anemia-in-chinese-adults
#10
Jie Cai, Meng Wu, Jie Ren, Yali Du, Zhangbiao Long, Guoxun Li, Bing Han, Lichen Yang
Our aim was to evaluate the cut-off value and efficiency of using reticulocyte hemoglobin content as a marker to diagnose iron deficiency anemia in Chinese adults. 140 adults who needed bone marrow aspiration for diagnosis at the hematology department of the Peking Union Medical College Hospital were enrolled according to the inclusive and exclusive criteria. Venous blood samples were collected to detect complete blood count, including hemoglobin, reticulocyte hemoglobin content, hematocrit, mean cellular volume, corpuscular hemoglobin concentration, hemoglobin content, free erythrocyte protoporphyrin; iron indexes of serum ferritin, serum transferrin receptor, and unsaturated iron-binding capacity; and inflammation markers of C-reactive protein and α-acid glycoprotein...
May 2, 2017: Nutrients
https://www.readbyqxmd.com/read/28463670/hereditary-spherocytosis-diagnosis-surgical-treatment-and-outcomes-a-literature-review
#11
Simona Manciu, Emil Matei, Bogdan Trandafir
Hereditary spherocytosis (HS) is a disease affecting the red blood cells membrane and belongs to the congenital hemolytic anemias. The clinical spectrum ranges from asymptomatic patients to severe forms requiring transfusions in early childhood. The diagnosis can be based on the physical examination, complete red blood cell count, reticulocytes count, medical history and specific tests, preferentially the EMA test (eosin-5-maleimide binding) test and AGLT (Acidified Glycerol Lysis Time). Splenectomy is considered the standard surgical treatment in moderate and severe forms of hereditary spherocytosis...
March 2017: Chirurgia
https://www.readbyqxmd.com/read/28461823/neonatal-indirect-hyperbilirubinemia-and-glucose-6-phosphate-dehydrogenase-deficiency
#12
Hasan M Isa, Masooma S Mohamed, Afaf M Mohamed, Adel Abdulla, Fuad Abdulla
PURPOSE: This study aimed to determine the prevalence of glucose-6-phosphate dehydrogenase (G6PD) deficiency among infants with neonatal indirect hyperbilirubinemia (NIH); compare G6PD-deficient and G6PD-normal patients regarding hyperbilirubinemia and need for exchange transfusions (ET); and assess risk factors for ET and kernicterus. METHODS: This is a case-control retrospective study. Medical records of NIH patients admitted to the Pediatric Department, Salmaniya Medical Complex, Bahrain, between January 2007 and June 2010 were reviewed...
April 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28460043/cell-free-mitochondrial-fusion-assay-detected-by-specific-protease-reaction-revealed-ca2-as-regulator-of-mitofusin-dependent-mitochondrial-fusion
#13
Naotada Ishihara, Maki Maeda, Tadato Ban, Katsuyoshi Mihara
Mitochondrial dynamic by frequent fusion and fission have important roles in various cellular signaling processes and pathophysiology in vivo. However, the molecular mechanisms that regulate mitochondrial fusion, especially in mammalian cells, are not well understood. Accordingly, we developed a novel biochemical cell-free mitochondrial fusion assay system using isolated human mitochondria. We used a protease and its specific substrate that are essential for yeast autophagy; Atg4 protease is required for maturation and the de-conjugation of the ubiquitin-like modifier Atg8...
April 27, 2017: Journal of Biochemistry
https://www.readbyqxmd.com/read/28454546/asymptomatic-plasmodium-vivax-infections-induce-robust-igg-responses-to-multiple-blood-stage-proteins-in-a-low-transmission-region-of-western-thailand
#14
Rhea J Longley, Camila T França, Michael T White, Chalermpon Kumpitak, Patiwat Sa-Angchai, Jakub Gruszczyk, Jessica B Hostetler, Anjali Yadava, Christopher L King, Rick M Fairhurst, Julian C Rayner, Wai-Hong Tham, Wang Nguitragool, Jetsumon Sattabongkot, Ivo Mueller
BACKGROUND: Thailand is aiming to eliminate malaria by the year 2024. Plasmodium vivax has now become the dominant species causing malaria within the country, and a high proportion of infections are asymptomatic. A better understanding of antibody dynamics to P. vivax antigens in a low-transmission setting, where acquired immune responses are poorly characterized, will be pivotal for developing new strategies for elimination, such as improved surveillance methods and vaccines. The objective of this study was to characterize total IgG antibody levels to 11 key P...
April 28, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28452907/in-a-mouse-model-of-sepsis-hepcidin-ablation-ameliorates-anemia-more-effectively-than-iron-and-erythropoietin-treatment
#15
Eeman Khorramian, Eileen Fung, Kristine Chua, Victoria Gabayan, Tomas Ganz, Elizabeta Nemeth, Airie Kim
Intensive Care Unit (ICU) anemia is an extreme version of anemia of inflammation (AI) that occurs commonly in critically ill patients and is associated with increased morbidity and mortality. Currently available therapies for ICU anemia have shown inconsistent efficacies in clinical trials. We conducted a systematic study of the effects of early versus delayed iron (Fe) and/or erythropoietin (EPO) therapy in our previously characterized mouse model of ICU anemia based on an injection of heat-killed Brucella abortus (BA)...
April 27, 2017: Shock
https://www.readbyqxmd.com/read/28450652/concordance-between-reticulocyte-hemoglobin-equivalent-and-reticulocyte-hemoglobin-content-in-ckd-patients-undergoing-hemodialysis
#16
Riadi Wirawan, Ailinda Theodora Tedja, Fify Henrika, Aida Lydia
AIM: to evaluate the correlation and the concordance between reticulocyte hemoglobin equivalent (RET-He) and reticulocyte hemoglobin content (CHr) as well as to obtain the cut-off value of RET-He as the target of iron supplementation in chronic kidney disease (CKD) patients undergoing hemodialysis. METHODS: a cross-sectional study was performed using K3EDTA-anticoagulated peripheral blood samples collected from 106 CKD patients undergoing routine hemodialysis. The samples were then analyzed using both Sysmex XN-2000 and Siemens ADVIA 2120i for RET-He and CHr analysis...
January 2017: Acta Medica Indonesiana
https://www.readbyqxmd.com/read/28447765/plasma-microrna-451-as-a-novel-hemolytic-marker-for-%C3%AE-0-thalassemia-hbe-disease
#17
Kamonlak Leecharoenkiat, Yuka Tanaka, Yasuko Harada, Porntip Chaichompoo, Orawan Sarakul, Yasunobu Abe, Duncan Richard Smith, Suthat Fucharoen, Saovaros Svasti, Tsukuru Umemura
In Southeast Asia, particularly in Thailand, β0-thalassemia/hemoglobin E (HbE) disease is a common hereditary hematological disease. It is associated with pathophysiological processes, such as the intramedullary destruction of immature erythroid cells and peripheral hemolysis of mature red blood cells. MicroRNA (miR) sequences, which are short non-coding RNA that regulate gene expression in a suppressive manner, serve a crucial role in human erythropoiesis. In the present study, the plasma levels of the erythroid-expressed miRNAs, miR‑451 and miR‑155, were analyzed in 23 patients with β0-thalassemia/HbE and 16 control subjects...
May 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28446125/soluble-transferrin-receptor-as-a-marker-of-erythropoiesis-in-patients-undergoing-high-flux-hemodialysis
#18
Pei Yin, Jijun Li, Yan Song
Anemia is a common complication in chronic kidney disease (CKD) patients receiving hemodialysis. The effect of high-flux dialysis (HFD) on anemia remains unclear. This prospective study aimed to evaluate the effect of HFD on anemia, and the potential of soluble transferrin receptor (sTfR) as a marker of iron status and erythropoiesis in CKD patients on hemodialysis. Forty patients, who switched from conventional low-flux dialysis to HFD for 12 months, were enrolled in this study. The levels of sTfR, hemoglobin, iron, and nutritional markers, as well as the dose of recombinant human erythropoietin (rhEPO) and use of chalybeate were determined at 0, 2, 6, and 12 months after starting HFD...
April 27, 2017: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28441942/rare-antibody-associated-hemolytic-transfusion-reaction-and-transfusion-related-acute-lung-injury-a-case-report
#19
Tim N Beck, Natalee G Young, Michelle L Erickson, Ignacio Prats
BACKGROUND: Hemolytic transfusion reactions and transfusion-related acute lung injury (TRALI) are life-threatening complications associated with the transfusion of blood products. Hemorrhage is one of the most common surgical complications and the risk of bleeding is particularly acute in patients with hematologic deficiencies. Management of surgical bleeding can be divided into two phases. The first phase centers on immediate control of acute bleeding and the second phase focuses on keeping the patient stable and on reducing the sequelae associated with blood transfusions and blood loss...
April 26, 2017: BMC Surgery
https://www.readbyqxmd.com/read/28439738/prospective-open-uncontrolled-phase-i-study-to-define-a-well-tolerated-dose-of-oral-artesunate-as-add-on-therapy-in-patients-with-metastatic-breast-cancer-artic-m33-2
#20
Cornelia von Hagens, Ingeborg Walter-Sack, Maren Goeckenjan, Julia Osburg, Brigitte Storch-Hagenlocher, Serkan Sertel, Michael Elsässer, Bjoern Andrew Remppis, Lutz Edler, Judith Munzinger, Thomas Efferth, Andreas Schneeweiss, Thomas Strowitzki
PURPOSE: The antimalarial drug artesunate (ART) is a promising candidate for cancer treatment as it displays anticancer effects in various models. While in short-term treatment of malaria, an excellent safety profile has been found for ART, the potential long-term treatment of cancer patients demands a phase I dose-finding clinical trial determining the daily ART dose which would be well tolerated as add-on therapy. METHODS: Patients with metastatic breast cancer were to receive either 100 or 150 or 200 mg oral ART daily as add-on to their guideline-based oncological therapy for a study period of four weeks with frequent clinical and laboratory monitoring until 4-8 weeks thereafter...
April 24, 2017: Breast Cancer Research and Treatment
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