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Nucleated red blood cells

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https://www.readbyqxmd.com/read/29128605/erythrocytes-as-a-biological-model-for-screening-of-xenobiotics-toxicity
#1
REVIEW
Mayada Ragab Farag, Mahmoud Alagawany
Erythrocytes are the main cells in circulation. They are devoid of internal membrane structures and easy to be isolated and handled providing a good model for different assays. Red blood cells (RBCs) plasma membrane is a multi-component structure that keeps the cell morphology, elasticity, flexibility and deformability. Alteration of membrane structure upon exposure to xenobiotics could induce various cellular abnormalities and releasing of intracellular components. Therefore the morphological changes and extracellular release of haemoglobin [hemolysis] and increased content of extracellular adenosine triphosphate (ATP) [as signs of membrane stability] could be used to evaluate the cytotoxic effects of various molecules...
November 8, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29089557/high-throughput-assessment-of-mechanical-properties-of-stem-cell-derived-red-blood-cells-toward-cellular-downstream-processing
#2
Ewa Guzniczak, Maryam Mohammad Zadeh, Fiona Dempsey, Melanie Jimenez, Henry Bock, Graeme Whyte, Nicholas Willoughby, Helen Bridle
Stem cell products, including manufactured red blood cells, require efficient sorting and purification methods to remove components potentially harmful for clinical application. However, standard approaches for cellular downstream processing rely on the use of specific and expensive labels (e.g. FACS or MACS). Techniques relying on inherent mechanical and physical properties of cells offer high-throughput scalable alternatives but knowledge of the mechanical phenotype is required. Here, we characterized for the first time deformability and size changes in CD34+ cells, and expelled nuclei, during their differentiation process into red blood cells at days 11, 14, 18 and 21, using Real-Time Deformability Cytometry (RT-DC) and Atomic Force Microscopy (AFM)...
October 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29076090/analysis-of-erythropoiesis-using-imaging-flow-cytometry
#3
Theodosia Kalfa, Kathleen E McGrath
Erythroid maturation has been classically defined based on the remarkable changes visualized through microscopy. These involve the decrease in cell size, nuclear condensation and organelle loss, and include the final unique asymmetric division creating the short-lived nucleated pyrenocyte and the enucleate reticulocyte that matures into the red blood cell. Understanding the regulation of these processes has been challenging due to the difficulty in obtaining sufficient numbers of cells, particularly of rare intermediates, to study by microscopy...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29074889/unravelling-pathways-downstream-sox6-induction-in-k562-erythroid-cells-by-proteomic-analysis
#4
Gloria Barbarani, Antonella Ronchi, Margherita Ruoppolo, Lucia Santorelli, Robert Steinfelder, Sudharshan Elangovan, Cristina Fugazza, Marianna Caterino
The Sox6 transcription factor is crucial for terminal maturation of definitive red blood cells. Sox6-null mouse fetuses present misshapen and nucleated erythrocytes, due to impaired actin assembly and cytoskeleton stability. These defects are accompanied with a reduced survival of Sox6(-/-) red blood cells, resulting in a compensated anemia. Sox6-overexpression in K562 cells and in human primary ex vivo erythroid cultures enhances erythroid differentiation and leads to hemoglobinization, the hallmark of erythroid maturation...
October 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29070145/-effect-of-erk1-2-signaling-pathway-inhibitor-pd98059-on-the-expression-of-ras-braf-mek-erk1-2-in-marrow-nucleated-red-blood-cells-of-cms-patients
#5
Yuan-Fang Han, Lin-Hua Ji, Ting-Ting Feng, Fang Liu, Sen Cui, Juan Su
OBJECTIVE: To investigate the effect of ERK1 / 2 signaling pathway inhibitor PD98059 on Ras, Raf, MEK, ERK1, ERK2 expression in order to explore a new way for basic research and clinical treatment of the chronic mountain sickness(CMS). METHODS: Sixteen CMS patients were selected, the bone marrow was collected for isolation of monomuclear cells (MNC), the cells were sorted by using CD71 and CD235a antibody magnetic beads, then positive cells were diveded into 5 groups: blank control, DMSO and PD98059 5, 10 and 20 µmol/L, and were cultured in hypoxid condition for 72 hours...
October 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/29055896/sifd-as-a-novel-cause-of-severe-fetal-hydrops-and-neonatal-anaemia-with-iron-loading-and-marked-extramedullary-haemopoiesis
#6
Chris Barton, Sabiha Kausar, Deborah Kerr, Stefania Bitetti, Rob Wynn
SIFD describes a heritable, syndromic condition characterised principally by sideroblastic anaemia (SA) with immunodeficiency, fevers and developmental delay, arising in mutations within the TRNT1 gene. Other clinical manifestations of SIFD include cardiomyopathy, seizures, sensorineural hearing loss, renal dysfunction, metabolic abnormalities, hepatosplenomegaly and retinitis pigmentosa.Presentation of SIFD is variable but typically in early childhood with SA or with fever. In this report, we extend the described SIFD phenotype...
October 21, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/29044529/automated-identification-of-normoblast-cell-from-human-peripheral-blood-smear-images
#7
Dev Kumar DAS, Asok Kumar Maiti, Chandan Chakraborty
In this paper, we have presented a new computer-aided technique for automatic detection of nucleated red blood cells (NRBCs) or normoblast cell from peripheral blood smear image. The proposed methodology initiates with the localization of the nucleated cells by adopting multilevel thresholding approach in smear images. A novel colour space transformation technique has been introduced to differentiate nucleated blood cells [white blood cells (WBCs) and NRBC] from red blood cells (RBCs) by enhancing the contrast between them...
October 17, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28990291/performance-evaluation-of-the-automated-nucleated-red-blood-cell-count-of-five-commercial-hematological-analyzers
#8
G Da Rin, M Vidali, F Balboni, A Benegiamo, M Borin, M L Ciardelli, F Dima, A Di Fabio, A Fanelli, F Fiorini, S Francione, L Germagnoli, M Gioia, T Lari, M Lorubbio, A Marini, A Papa, M Seghezzi, L Solarino, S Pipitone, E Tilocca, S Buoro
INTRODUCTION: Recent automated hematology analyzers (HAs) can identify and report nucleated red blood cells (NRBC) count as a separate population out of white blood cells (WBC). The aim of this study was to investigate the analytical performances of NRBC enumeration on five top of the range HAs. METHODS: We evaluated the within-run and between-day precision, limit of blank (LoB), limit of detection (LoD), and limit of quantitation (LoQ) of XE-2100 and XN-module (Sysmex), ADVIA 2120i (Siemens), BC-6800 (Mindray), and UniCel DxH 800 (Beckman Coulter)...
October 8, 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/28980399/comparison-of-performance-and-abnormal-cell-flagging-of-two-automated-hematology-analyzers-sysmex-xn-3000-and-beckman-coulter-dxh-800
#9
S Genc, E Dervisoglu, S Erdem, O Arslan, M Aktan, B Omer
INTRODUCTION: The purpose was to evaluate the analytical performances of Sysmex XN 3000 and UniCel DxH 800 comparing the obtained results with manual counting and between each other. Also flagging capabilities of abnormal cells were compared for both analyzers. METHODS: Two thousand one hundred and forty-two whole-blood samples were analyzed for evaluation. The samples flagged due to blast, atypical lymphocyte (AL), immature granulocyte (IG), or nucleated red blood cells (NRBC) were microscopically reviewed (n=102)...
October 4, 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/28969191/an-attempt-to-make-platelet-rich-fibrin-from-bone-marrow-aspirate
#10
Soh Nishimoto, Kazutoshi Fujita, Toshihiro Fujiwara, Yohei Sotsuka, Maki Tonooka, Hisako Ishise, Kenichiro Kawai, Masao Kakibuchi
INTRODUCTION: Platelet Rich Fibrin (PRF) was developed as a new generation of platelet concentration from peripheral blood. Method to make PRF is simple. It is easy to handle with its moderate firmness. Histologically, platelets and nucleated cells are packed along the yellow-red border. Bone marrow aspirate contains bone marrow cells that potentially work for tissue regeneration, and platelets which contain growth factors. The specific gravities of them are comparable. It implies that, if it is possible to make PRF from bone marrow aspirate, then high concentration of platelets and bone marrow cells can be obtained simultaneously by taking out yellow-red interface of it...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28890905/single-versus-multiple-site-harvesting-techniques-for-bone-marrow-concentrate-evaluation-of-aspirate-quality-and-pain
#11
Kristin Oliver, Tariq Awan, Matthew Bayes
BACKGROUND: Bone marrow concentrate (BMC) is growing in popularity as an alternative treatment option in orthopaedics. The regenerative capacity of BMC has been linked to the number of mesenchymal stem cells (MSCs) present in the graft at the time of its clinical application. MSC counts in bone marrow aspirate (BMA) are affected by harvest technique, but controversy exists over which aspiration method optimizes cellular yield while taking patient comfort and risk into consideration. PURPOSE: To compare a single- versus multiple-site bone marrow aspiration technique to determine which would generate a sufficient volume of high-quality BMA for concentration into a BMC graft...
August 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28883519/monolithic-chip-for-high-throughput-blood-cell-depletion-to-sort-rare-circulating-tumor-cells
#12
Fabio Fachin, Philipp Spuhler, Joseph M Martel-Foley, Jon F Edd, Thomas A Barber, John Walsh, Murat Karabacak, Vincent Pai, Melissa Yu, Kyle Smith, Henry Hwang, Jennifer Yang, Sahil Shah, Ruby Yarmush, Lecia V Sequist, Shannon L Stott, Shyamala Maheswaran, Daniel A Haber, Ravi Kapur, Mehmet Toner
Circulating tumor cells (CTCs) are a treasure trove of information regarding the location, type and stage of cancer and are being pursued as both a diagnostic target and a means of guiding personalized treatment. Most isolation technologies utilize properties of the CTCs themselves such as surface antigens (e.g., epithelial cell adhesion molecule or EpCAM) or size to separate them from blood cell populations. We present an automated monolithic chip with 128 multiplexed deterministic lateral displacement devices containing ~1...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28880455/automated-cell-counts-on-csf-samples-a-multicenter-performance-evaluation-of-the-glocyte-system
#13
E A Hod, C Brugnara, M Pilichowska, L M Sandhaus, H S Luu, S K Forest, J C Netterwald, G M Reynafarje, A Kratz
OBJECTIVES: Automated cell counters have replaced manual enumeration of cells in blood and most body fluids. However, due to the unreliability of automated methods at very low cell counts, most laboratories continue to perform labor-intensive manual counts on many or all cerebrospinal fluid (CSF) samples. This multicenter clinical trial investigated if the GloCyte System (Advanced Instruments, Norwood, MA), a recently FDA-approved automated cell counter, which concentrates and enumerates red blood cells (RBCs) and total nucleated cells (TNCs), is sufficiently accurate and precise at very low cell counts to replace all manual CSF counts...
September 7, 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/28858830/exposure-to-low-levels-of-lead-in-utero-and-umbilical-cord-blood-dna-methylation-in-project-viva-an-epigenome-wide-association-study
#14
Shaowei Wu, Marie-France Hivert, Andres Cardenas, Jia Zhong, Sheryl L Rifas-Shiman, Golareh Agha, Elena Colicino, Allan C Just, Chitra Amarasiriwardena, Xihong Lin, Augusto A Litonjua, Dawn L DeMeo, Matthew W Gillman, Robert O Wright, Emily Oken, Andrea A Baccarelli
BACKGROUND: Early-life exposure to lead is associated with deficits in neurodevelopment and with hematopoietic system toxicity. DNA methylation may be one of the underlying mechanisms for the adverse effects of prenatal lead on the offspring, but epigenome-wide methylation data for low levels of prenatal lead exposure are lacking. OBJECTIVES: We investigated the association between prenatal maternal lead exposure and epigenome-wide DNA methylation in umbilical cord blood nucleated cells in Project Viva, a prospective U...
August 25, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28856231/investigation-of-morphological-changes-for-the-discrimination-of-nucleated-red-blood-cells-and-other-leukocytes-in-sysmex-xn-hematology-analyzer-scattergrams-using-transmission-electron-microscopy
#15
Masako Kaido, Yuri Takagi, Mari Kono, Fumie Nakazawa, Shiori Yamamoto, Atsushi Wada, Takashi Morikawa
BACKGROUND: The WNR channel of the XN-Series automated hematology analyzer (Sysmex) counts white blood cells (WBCs) and simultaneously performs a differential counting of basophils and nucleated red blood cells (NRBCs). The detection process involves exposing the cells to WNR-specific reagents containing an acidic detergent and a fluorescent dye and measuring the intensity of the forward scattered light (FSC) and side fluorescence light (SFL). METHOD: We treated isolated peripheral WBCs and NRBCs with specific reagents and assessed the morphological changes in NRBCs and each leukocyte type using transmission electron microscopy (TEM)...
August 2017: Pract Lab Med
https://www.readbyqxmd.com/read/28853417/recommendations-for-cerebrospinal-fluid-examination-in-acute-leukemia
#16
Sandrine Girard, Odile Fenneteau, Fanélie Mestrallet, Xavier Troussard, Jean-François Lesesve
Cytological identification of blasts in cerebrospinal fluid in acute leukemia, lymphoid or myeloid, in adult and child, at diagnosis or during follow up lead to the diagnosis of leukemic meningitidis. Suitable CNS therapy based on a defined "CNS status" following an international standardized classification, lead to decrease cerebrospinal relapses. Established in 1993, this classification allows to treat patients based on their CNS status. Based on the red blood cells count, nucleated cells count and presence of blasts, it requires a standard technical procedure that guarantees the comparability of results coming from different medical laboratory...
August 30, 2017: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/28843601/preliminary-evaluation-of-uf-5000-body-fluid-mode-for-automated-cerebrospinal-fluid-cell-counting
#17
Michela Seghezzi, Barbara Manenti, Giulia Previtali, Maria Grazia Alessio, Paola Dominoni, Sabrina Buoro
BACKGROUND: Cellular analysis of cerebrospinal fluid (CSF) provides important diagnostic information in various medical conditions. The aim of this study was to evaluate the application of Sysmex UF-5000 body fluid mode in cytometric analysis of CSF compared to Light Microscopic (LM). METHODS: Eighty-one consecutive CSF samples were analyzed by UF-5000 body fluid mode and by LM. The study also included the evaluation of: limit of Blank (LoB), limit of Detection (LoD), limit of Quantitation (LoQ), carryover and linearity...
October 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28752394/a-prolonged-microscopic-observation-improves-detection-of-underpopulated-cells-in-peripheral-blood-smears
#18
Antonio La Gioia, Fabiana Fiorini, Maurizio Fumi, Marcello Fiorini, Ylenia Pancione, Lucia Rocco, Silvia Sale, Maria Bombara, Vincenzo Rocco
We evaluated an extended time in the microscopic review in samples in which the potential clinical information could be increased with respect to those that could be achieved with the usual laboratory methodologies. We used samples containing nucleated red blood cells in a small amount and cytopenic samples. For these purposes for each peripheral blood smear, the timing of eye-count differential was increased up to 20 min, regardless of the final number of cells which could be counted. In addition, an automated system for digital analysis of peripheral blood smears was employed and the number of cells counted was brought up to 1000 leukocytes...
October 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28736161/-immortalization-of-erythroid-progenitors-for-in-vitro-large-scale-red-cell-production
#19
A Caulier, L Guyonneau Harmand, L Garçon
Population ageing and increase in cancer incidence may lead to a decreased availability of red blood cell units. Thus, finding an alternative source of red blood cells is a highly relevant challenge. The possibility to reproduce in vitro the human erythropoiesis opens a new era, particularly since the improvement in the culture systems allows to produce erythrocytes from induced-Pluripotent Stem Cells (iPSCs), or CD34(+) Hematopoietic Stem Cells (HSCs). iPSCs have the advantage of in vitro self-renewal, but lead to poor amplification and maturation defects (high persistence of nucleated erythroid precursors)...
July 20, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28735973/in-vitro-study-on-the-regulation-of-cellular-mrna-levels-by-changes-in-transcription-rate-and-transcript-stability-in-fish-red-blood-cells
#20
Miriam Götting, Mikko Nikinmaa
The interplay of transcriptional and post-transcriptional processes in the regulation of gene expression has been extensively studied in mammals but little is known in other vertebrates so far. Most non-mammalian vertebrates are faced with environmental cues and stressors distinct from those experienced by mammals and thus it is likely that the gene expression strategies differ from those of mammals. Here we performed experiments to study in vitro the various levels of gene expression regulation in nucleated fish red blood cells...
November 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
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