1
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Rosenberg CA, Rodrigues MA, Bill M, Ludvigsen M. Comparative analysis of feature-based ML and CNN for binucleated erythroblast quantification in myelodysplastic syndrome patients using imaging flow cytometry data. Sci Rep 2024; 14:9349. [PMID: 38654058 DOI: 10.1038/s41598-024-59875-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 04/16/2024] [Indexed: 04/25/2024] Open
Abstract
Myelodysplastic syndrome is primarily characterized by dysplasia in the bone marrow (BM), presenting a challenge in consistent morphology interpretation. Accurate diagnosis through traditional slide-based analysis is difficult, necessitating a standardized objective technique. Over the past two decades, imaging flow cytometry (IFC) has proven effective in combining image-based morphometric analyses with high-parameter phenotyping. We have previously demonstrated the effectiveness of combining IFC with a feature-based machine learning algorithm to accurately identify and quantify rare binucleated erythroblasts (BNEs) in dyserythropoietic BM cells. However, a feature-based workflow poses challenges requiring software-specific expertise. Here we employ a Convolutional Neural Network (CNN) algorithm for BNE identification and differentiation from doublets and cells with irregular nuclear morphology in IFC data. We demonstrate that this simplified AI workflow, coupled with a powerful CNN algorithm, achieves comparable BNE quantification accuracy to manual and feature-based analysis with substantial time savings, eliminating workflow complexity. This streamlined approach holds significant clinical value, enhancing IFC accessibility for routine diagnostic purposes.
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Affiliation(s)
- Carina A Rosenberg
- Department of Hematology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 35, C115, 8200, Aarhus C, Denmark.
| | - Matthew A Rodrigues
- Amnis Flow Cytometry, Cytek Biosciences, Seattle, WA, USA
- RareCyte, Inc., Seattle, WA, USA
| | - Marie Bill
- Department of Hematology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 35, C115, 8200, Aarhus C, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Maja Ludvigsen
- Department of Hematology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 35, C115, 8200, Aarhus C, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
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2
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An C, Xue F, Sun L, Han H, Zhang Y, Hu Y. The impact of erythroblast enucleation efficiency on the severity of anemia in patients with myelodysplastic syndrome. Cell Commun Signal 2023; 21:332. [PMID: 37986081 PMCID: PMC10658927 DOI: 10.1186/s12964-023-01353-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/11/2023] [Indexed: 11/22/2023] Open
Abstract
Anemia is the most common manifestation in myelodysplastic syndrome (MDS) patients, but the cause of ineffective hematopoiesis is not fully understood. Enucleation is an important event in the maturation process of erythroblasts. According to a series of morphological phenotypes of the pathological development of MDS erythroblasts, we speculate that there may be enucleation disorders. To verify this hypothesis, we cultured MDS bone marrow CD34+ cells in vitro and induced erythroblast development. The results showed that erythroblast enucleation in MDS was significantly lower than that in the normal group, and the rate of enucleation was positively correlated with hemoglobin concentration. Risk stratification of MDS was performed to further analyze the differences in enucleation among the normal group, low-middle risk group and high-risk group. The results showed that the enucleation rate of the high risk group was higher than that of the low-middle risk group but still lower than that of the normal group. Moreover, the expression of pERK and pAKT in MDS erythroblasts in the high risk group was higher than that in the normal group, while the expression of pERK and pAKT in the low-middle risk group was lower than that in the normal group. Furthermore, the enucleation of MDS was positively correlated with the phosphorylation degree of ERK and AKT. In conclusion, this study reveals that the enucleation of erythroblasts is one of the possible causes of anemia in MDS. Video Abstract.
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Affiliation(s)
- Chao An
- Department of Clinical Laboratory, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, 450014, Henan, China.
| | - Fumin Xue
- Henan Key Laboratory of Children's Genetics and Metabolic Diseases, Children's Hospital Affiliated to Zhengzhou University, Zhengzhou, 450000, Henan, China
| | - Ling Sun
- Department of Hematology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Haiyan Han
- Department of Clinical Laboratory, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, 450014, Henan, China
| | - Yali Zhang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, 450014, Henan, China
| | - Yibo Hu
- Department of Clinical Laboratory, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, 450014, Henan, China.
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3
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Kumari R, Grzywa TM, Małecka-Giełdowska M, Tyszkowska K, Wrzesień R, Ciepiela O, Nowis D, Kaźmierczak P. Ablation of Tmcc2 Gene Impairs Erythropoiesis in Mice. Int J Mol Sci 2022; 23:ijms23095263. [PMID: 35563652 PMCID: PMC9102901 DOI: 10.3390/ijms23095263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/01/2022] [Accepted: 05/04/2022] [Indexed: 12/23/2022] Open
Abstract
(1) Background: Transcriptomic and proteomic studies provide a wealth of new genes potentially involved in red blood cell (RBC) maturation or implicated in the pathogenesis of anemias, necessitating validation of candidate genes in vivo; (2) Methods: We inactivated one such candidate, transmembrane and coiled-coil domain 2 (Tmcc2) in mice, and analyzed the erythropoietic phenotype by light microscopy, transmission electron microscopy (TEM), and flow cytometry of erythrocytes and erythroid precursors; (3) Results: Tmcc2−/− pups presented pallor and reduced body weight due to the profound neonatal macrocytic anemia with numerous nucleated RBCs (nRBCs) and occasional multinucleated RBCs. Tmcc2−/− nRBCs had cytoplasmic intrusions into the nucleus and double membranes. Significantly fewer erythroid cells were enucleated. Adult knockouts were normocytic, mildly polycythemic, with active extramedullary erythropoiesis in the spleen. Altered relative content of different stage CD71+TER119+ erythroid precursors in the bone marrow indicated a severe defect of erythroid maturation at the polychromatic to orthochromatic transition stage; (4) Conclusions: Tmcc2 is required for normal erythropoiesis in mice. While several phenotypic features resemble congenital dyserythropoietic anemias (CDA) types II, III, and IV, the involvement of TMCC2 in the pathogenesis of CDA in humans remains to be determined.
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Affiliation(s)
- Ranju Kumari
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland;
- School of Molecular Medicine, Medical University of Warsaw, Żwirki i Wigury 61, 02-091 Warsaw, Poland
| | - Tomasz M. Grzywa
- Department of Immunology, Medical University of Warsaw, Nielubowicza 5, 02-097 Warsaw, Poland; (T.M.G.); (D.N.)
- Doctoral School, Medical University of Warsaw, Żwirki i Wigury 61, 02-091 Warsaw, Poland
- Laboratory of Experimental Medicine, Medical University of Warsaw, Nielubowicza 5, 02-097 Warsaw, Poland
| | - Milena Małecka-Giełdowska
- Department of Laboratory Medicine, Medical University of Warsaw, Banacha 1A, 02-097 Warsaw, Poland; (M.M.-G.); (O.C.)
| | - Karolina Tyszkowska
- Central Laboratory of Experimental Animal, Centre for Preclinical Research, Medical University of Warsaw, Banacha 1B, 02-097 Warsaw, Poland; (K.T.); (R.W.)
| | - Robert Wrzesień
- Central Laboratory of Experimental Animal, Centre for Preclinical Research, Medical University of Warsaw, Banacha 1B, 02-097 Warsaw, Poland; (K.T.); (R.W.)
| | - Olga Ciepiela
- Department of Laboratory Medicine, Medical University of Warsaw, Banacha 1A, 02-097 Warsaw, Poland; (M.M.-G.); (O.C.)
| | - Dominika Nowis
- Department of Immunology, Medical University of Warsaw, Nielubowicza 5, 02-097 Warsaw, Poland; (T.M.G.); (D.N.)
- Laboratory of Experimental Medicine, Medical University of Warsaw, Nielubowicza 5, 02-097 Warsaw, Poland
| | - Piotr Kaźmierczak
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland;
- Correspondence: or
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4
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Feola M, Zamperone A, Moskop D, Chen H, Casu C, Lama D, Di Martino J, Djedaini M, Papa L, Martinez MR, Choesang T, Bravo-Cordero JJ, MacKay M, Zumbo P, Brinkman N, Abrams CS, Rivella S, Hattangadi S, Mason CE, Hoffman R, Ji P, Follenzi A, Ginzburg YZ. Pleckstrin-2 is essential for erythropoiesis in β-thalassemic mice, reducing apoptosis and enhancing enucleation. Commun Biol 2021; 4:517. [PMID: 33941818 PMCID: PMC8093212 DOI: 10.1038/s42003-021-02046-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 03/23/2021] [Indexed: 02/03/2023] Open
Abstract
Erythropoiesis involves complex interrelated molecular signals influencing cell survival, differentiation, and enucleation. Diseases associated with ineffective erythropoiesis, such as β-thalassemias, exhibit erythroid expansion and defective enucleation. Clear mechanistic determinants of what make erythropoiesis effective are lacking. We previously demonstrated that exogenous transferrin ameliorates ineffective erythropoiesis in β-thalassemic mice. In the current work, we utilize transferrin treatment to elucidate a molecular signature of ineffective erythropoiesis in β-thalassemia. We hypothesize that compensatory mechanisms are required in β-thalassemic erythropoiesis to prevent apoptosis and enhance enucleation. We identify pleckstrin-2-a STAT5-dependent lipid binding protein downstream of erythropoietin-as an important regulatory node. We demonstrate that partial loss of pleckstrin-2 leads to worsening ineffective erythropoiesis and pleckstrin-2 knockout leads to embryonic lethality in β-thalassemic mice. In addition, the membrane-associated active form of pleckstrin-2 occurs at an earlier stage during β-thalassemic erythropoiesis. Furthermore, membrane-associated activated pleckstrin-2 decreases cofilin mitochondrial localization in β-thalassemic erythroblasts and pleckstrin-2 knockdown in vitro induces cofilin-mediated apoptosis in β-thalassemic erythroblasts. Lastly, pleckstrin-2 enhances enucleation by interacting with and activating RacGTPases in β-thalassemic erythroblasts. This data elucidates the important compensatory role of pleckstrin-2 in β-thalassemia and provides support for the development of targeted therapeutics in diseases of ineffective erythropoiesis.
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Affiliation(s)
- Maria Feola
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- University of Piemonte Orientale, Amedeo Avogadro, Novara, Italy
| | - Andrea Zamperone
- Perlmutter Cancer Center, New York University Langone Medical Center, New York, NY, USA
| | - Daniel Moskop
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Huiyong Chen
- Erythropoiesis Laboratory, New York Blood Center, New York, NY, USA
- Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, China
| | - Carla Casu
- Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Dechen Lama
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Julie Di Martino
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Mansour Djedaini
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Luena Papa
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Marc Ruiz Martinez
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Tenzin Choesang
- Erythropoiesis Laboratory, New York Blood Center, New York, NY, USA
| | | | | | - Paul Zumbo
- Weill Cornell Medical College, New York, NY, USA
| | | | - Charles S Abrams
- Perelman Center for Advanced Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, USA
| | | | | | | | - Ronald Hoffman
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Peng Ji
- Northwestern University, Chicago, IL, USA
| | - Antonia Follenzi
- University of Piemonte Orientale, Amedeo Avogadro, Novara, Italy
| | - Yelena Z Ginzburg
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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5
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Han SY, Lee EM, Kim S, Kwon AM, Baek EJ. Role of Plasma Gelsolin Protein in the Final Stage of Erythropoiesis and in Correction of Erythroid Dysplasia In Vitro. Int J Mol Sci 2020; 21:ijms21197132. [PMID: 32992584 PMCID: PMC7583768 DOI: 10.3390/ijms21197132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 11/16/2022] Open
Abstract
Gelsolin, an actin-remodeling protein, is involved in cell motility, cytoskeletal remodeling, and cytokinesis and is abnormally expressed in many cancers. Recently, human recombinant plasma gelsolin protein (pGSN) was reported to have important roles in cell cycle and maturation of primary erythroblasts. However, the role of human plasma gelsolin in late stage erythroblasts prior to enucleation and putative clinical relevance in patients with myelodysplastic syndrome (MDS) and hemato-oncologic diseases have not been reported. Polychromatic and orthochromatic erythroblasts differentiated from human cord blood CD34+ cells, and human bone marrow (BM) cells derived from patients with MDS, were cultured in serum-free medium containing pGSN. Effects of pGSN on mitochondria, erythroid dysplasia, and enucleation were assessed in cellular and transcriptional levels. With pGSN treatment, terminal maturation at the stage of poly- and ortho-chromatic erythroblasts was enhanced, with higher numbers of orthochromatic erythroblasts and enucleated red blood cells (RBCs). pGSN also significantly decreased dysplastic features of cell morphology. Moreover, we found that patients with MDS with multi-lineage dysplasia or with excess blasts-1 showed significantly decreased expression of gelsolin mRNA (GSN) in their peripheral blood. When BM erythroblasts of MDS patients were cultured with pGSN, levels of mRNA transcripts related to terminal erythropoiesis and enucleation were markedly increased, with significantly decreased erythroid dysplasia. Moreover, pGSN treatment enhanced mitochondrial transmembrane potential that is unregulated in MDS and cultured cells. Our findings demonstrate a key role for plasma gelsolin in erythropoiesis and in gelsolin-depleted MDS patients, and raises the possibility that pGSN administration may promote erythropoiesis in erythroid dysplasia.
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Affiliation(s)
- So Yeon Han
- Department of Laboratory Medicine, College of Medicine, Hanyang University, Seoul 04763, Korea; (S.Y.H.); (S.K.)
- Department of Translational Medicine, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul 04763, Korea;
| | - Eun Mi Lee
- Department of Translational Medicine, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul 04763, Korea;
| | - Suyeon Kim
- Department of Laboratory Medicine, College of Medicine, Hanyang University, Seoul 04763, Korea; (S.Y.H.); (S.K.)
| | - Amy M. Kwon
- Biostatistical Consulting and Research Laboratory, Medical Research Collaborating Center, Industry-University Cooperation Foundation, Hanyang University, Seoul 04763, Korea;
| | - Eun Jung Baek
- Department of Laboratory Medicine, College of Medicine, Hanyang University, Seoul 04763, Korea; (S.Y.H.); (S.K.)
- Department of Translational Medicine, Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul 04763, Korea;
- Correspondence: ; Tel.: +82-31-560-2485; Fax: +82-31-560-2489
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6
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Neveu G, Richard C, Dupuy F, Behera P, Volpe F, Subramani PA, Marcel-Zerrougui B, Vallin P, Andrieu M, Minz AM, Azar N, Martins RM, Lorthiois A, Gazeau F, Lopez-Rubio JJ, Mazier D, Silva AKA, Satpathi S, Wassmer SC, Verdier F, Lavazec C. Plasmodium falciparum sexual parasites develop in human erythroblasts and affect erythropoiesis. Blood 2020; 136:1381-1393. [PMID: 32589714 PMCID: PMC7498361 DOI: 10.1182/blood.2019004746] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 06/01/2020] [Indexed: 02/07/2023] Open
Abstract
Plasmodium falciparum gametocytes, the sexual stage responsible for malaria parasite transmission from humans to mosquitoes, are key targets for malaria elimination. Immature gametocytes develop in the human bone marrow parenchyma, where they accumulate around erythroblastic islands. Notably though, the interactions between gametocytes and this hematopoietic niche have not been investigated. Here, we identify late erythroblasts as a new host cell for P falciparum sexual stages and show that gametocytes can fully develop inside these nucleated cells in vitro and in vivo, leading to infectious mature gametocytes within reticulocytes. Strikingly, we found that infection of erythroblasts by gametocytes and parasite-derived extracellular vesicles delay erythroid differentiation, thereby allowing gametocyte maturation to coincide with the release of their host cell from the bone marrow. Taken together, our findings highlight new mechanisms that are pivotal for the maintenance of immature gametocytes in the bone marrow and provide further insights on how Plasmodium parasites interfere with erythropoiesis and contribute to anemia in malaria patients.
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Affiliation(s)
- Gaëlle Neveu
- INSERM U1016, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8104, Université de Paris, Institut Cochin, Paris, France
- Laboratoire d'Excellence GR-Ex, Paris, France
| | - Cyrielle Richard
- INSERM U1016, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8104, Université de Paris, Institut Cochin, Paris, France
- Laboratoire d'Excellence GR-Ex, Paris, France
| | - Florian Dupuy
- INSERM U1016, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8104, Université de Paris, Institut Cochin, Paris, France
- Laboratoire d'Excellence GR-Ex, Paris, France
| | - Prativa Behera
- Department of Pathology, Ispat General Hospital, Rourkela, Odisha, India
| | - Fiona Volpe
- INSERM U1016, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8104, Université de Paris, Institut Cochin, Paris, France
- Laboratoire d'Excellence GR-Ex, Paris, France
| | - Pradeep Annamalai Subramani
- INSERM U1135, CNRS Equipe de Recherche Labellisée (ERL) 8255, Sorbonne Université, Centre d'Immunologie et des Maladies Infectieuses, Paris, France
| | | | - Patrice Vallin
- INSERM U1016, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8104, Université de Paris, Institut Cochin, Paris, France
| | - Muriel Andrieu
- INSERM U1016, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8104, Université de Paris, Institut Cochin, Paris, France
| | - Aruna Mukti Minz
- Department of Pathology, Ispat General Hospital, Rourkela, Odisha, India
| | - Nabih Azar
- Service d'Hémobiologie, Hôpital La Pitié Salpêtrière, Paris, France
| | - Rafael M Martins
- Laboratory of Pathogen Host Interactions - UMR 5235, CNRS, INSERM, Université de Montpellier, Montpellier, France; and
| | - Audrey Lorthiois
- INSERM U1016, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8104, Université de Paris, Institut Cochin, Paris, France
- Laboratoire d'Excellence GR-Ex, Paris, France
| | - Florence Gazeau
- Laboratoire Matières et Systèmes Complexes, UMR 7057 CNRS, Université de Paris, Paris, France
| | - José-Juan Lopez-Rubio
- Laboratory of Pathogen Host Interactions - UMR 5235, CNRS, INSERM, Université de Montpellier, Montpellier, France; and
| | - Dominique Mazier
- INSERM U1135, CNRS Equipe de Recherche Labellisée (ERL) 8255, Sorbonne Université, Centre d'Immunologie et des Maladies Infectieuses, Paris, France
| | - Amanda K A Silva
- Laboratoire Matières et Systèmes Complexes, UMR 7057 CNRS, Université de Paris, Paris, France
| | | | - Samuel C Wassmer
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Frédérique Verdier
- INSERM U1016, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8104, Université de Paris, Institut Cochin, Paris, France
- Laboratoire d'Excellence GR-Ex, Paris, France
| | - Catherine Lavazec
- INSERM U1016, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 8104, Université de Paris, Institut Cochin, Paris, France
- Laboratoire d'Excellence GR-Ex, Paris, France
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7
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Liu H, Tang F, Su J, Ma J, Qin Y, Ji L, Geng H, Wang S, Zhang P, Liu J, Cui S, Ge RL, Li Z. EPAS1 regulates proliferation of erythroblasts in chronic mountain sickness. Blood Cells Mol Dis 2020; 84:102446. [PMID: 32470757 DOI: 10.1016/j.bcmd.2020.102446] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 01/13/2023]
Abstract
Excessive erythrocytosis (EE) is a characteristic of chronic mountain sickness (CMS). Currently, the pathogenesis of CMS remains unclear. This study was intended to investigate the role of EPAS1 in the proliferation of erythroblasts in CMS. Changes of HIF-1α and EPAS1/HIF-2α in the bone marrow erythroblasts of 21 patients with CMS and 14 control subjects residing at the same altitudes were determined by RT-qPCR and western blotting. We also developed a lentiviral vector, Lv-EPAS1/sh-EPAS1, to over-express/silence EPAS1 in K562 cells. Cells cycle and proliferation were detected by flow cytometry. Transcriptome analyses were carried out on Illumina. CMS patients showed a higher expression of EPAS1/HIF-2α in the bone marrow erythroblasts than those of controls. Variations in EPAS1 expression in CMS patients were positively correlated with RBC levels, and negatively correlated with SaO2. Over-expressing of EPAS1 in K562 cells accelerated the erythroid cells cycle progression and promoted the erythroid cells proliferation-and vice versa. Transcriptome data indicated that proliferation-related DEGs were significantly enriched in EPAS1 overexpression/silencing K562 cells. Our results suggest that EPAS1 might participate in the pathogenesis of EE by regulating the proliferation of erythroblasts.
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Affiliation(s)
- Huihui Liu
- Research Center for High Altitude Medicine, Qinghai University, Xining, China; Qinghai Key Laboratory of Science and Technology for High Altitude Medicine, Xining, China; Qinghai-Utah Joint Research Key Lab for High Altitude Medicine, Xining, China; Department of Rheumatology, Affiliated Hospital of Qinghai University, Xining, China
| | - Feng Tang
- Research Center for High Altitude Medicine, Qinghai University, Xining, China; Qinghai Key Laboratory of Science and Technology for High Altitude Medicine, Xining, China; Qinghai-Utah Joint Research Key Lab for High Altitude Medicine, Xining, China
| | - Juan Su
- Department of Rheumatology, Affiliated Hospital of Qinghai University, Xining, China
| | - Jie Ma
- Department of Hematology, Affiliated Hospital of Qinghai University, Xining, China
| | - Yajing Qin
- Department of Rheumatology, Affiliated Hospital of Qinghai University, Xining, China
| | - Linhua Ji
- Department of Hematology, Affiliated Hospital of Qinghai University, Xining, China
| | - Hui Geng
- Department of Rheumatology, Affiliated Hospital of Qinghai University, Xining, China
| | - Shengyan Wang
- Research Center for High Altitude Medicine, Qinghai University, Xining, China; Qinghai Key Laboratory of Science and Technology for High Altitude Medicine, Xining, China; Qinghai-Utah Joint Research Key Lab for High Altitude Medicine, Xining, China
| | - Peili Zhang
- Research Center for High Altitude Medicine, Qinghai University, Xining, China; Qinghai Key Laboratory of Science and Technology for High Altitude Medicine, Xining, China; Qinghai-Utah Joint Research Key Lab for High Altitude Medicine, Xining, China
| | - Junli Liu
- Research Center for High Altitude Medicine, Qinghai University, Xining, China; Qinghai Key Laboratory of Science and Technology for High Altitude Medicine, Xining, China; Qinghai-Utah Joint Research Key Lab for High Altitude Medicine, Xining, China
| | - Sen Cui
- Department of Hematology, Affiliated Hospital of Qinghai University, Xining, China
| | - Ri-Li Ge
- Research Center for High Altitude Medicine, Qinghai University, Xining, China; Qinghai Key Laboratory of Science and Technology for High Altitude Medicine, Xining, China; Qinghai-Utah Joint Research Key Lab for High Altitude Medicine, Xining, China
| | - Zhanquan Li
- Department of Rheumatology, Affiliated Hospital of Qinghai University, Xining, China.
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8
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Berger G, Gerritsen M, Yi G, Koorenhof-Scheele TN, Kroeze LI, Stevens-Kroef M, Yoshida K, Shiraishi Y, van den Berg E, Schepers H, Huls G, Mulder AB, Ogawa S, Martens JHA, Jansen JH, Vellenga E. Ring sideroblasts in AML are associated with adverse risk characteristics and have a distinct gene expression pattern. Blood Adv 2019; 3:3111-3122. [PMID: 31648334 PMCID: PMC6849935 DOI: 10.1182/bloodadvances.2019000518] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 09/14/2019] [Indexed: 12/24/2022] Open
Abstract
Ring sideroblasts (RS) emerge as result of aberrant erythroid differentiation leading to excessive mitochondrial iron accumulation, a characteristic feature for myelodysplastic syndromes (MDS) with mutations in the spliceosome gene SF3B1. However, RS can also be observed in patients diagnosed with acute myeloid leukemia (AML). The objective of this study was to characterize RS in patients with AML. Clinically, RS-AML is enriched for ELN adverse risk (55%). In line with this finding, 35% of all cases had complex cytogenetic aberrancies, and TP53 was most recurrently mutated in this cohort (37%), followed by DNMT3A (26%), RUNX1 (25%), TET2 (20%), and ASXL1 (19%). In contrast to RS-MDS, the incidence of SF3B1 mutations was low (8%). Whole-exome sequencing and SNP array analysis on a subset of patients did not uncover a single genetic defect underlying the RS phenotype. Shared genetic defects between erythroblasts and total mononuclear cell fraction indicate common ancestry for the erythroid lineage and the myeloid blast cells in patients with RS-AML. RNA sequencing analysis on CD34+ AML cells revealed differential gene expression between RS-AML and non RS-AML cases, including genes involved in megakaryocyte and erythroid differentiation. Furthermore, several heme metabolism-related genes were found to be upregulated in RS- CD34+ AML cells, as was observed in SF3B1mut MDS. These results demonstrate that although the genetic background of RS-AML differs from that of RS-MDS, they have certain downstream effector pathways in common.
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Affiliation(s)
- Gerbrig Berger
- Department of Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Mylene Gerritsen
- Department of Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Guoqiang Yi
- Department of Molecular Biology, Radboud University, Nijmegen, The Netherlands
| | | | | | - Marian Stevens-Kroef
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Kenichi Yoshida
- Department of Pathology & Tumor Biology, Kyoto University, Kyoto, Japan
| | - Yuichi Shiraishi
- Laboratory of DNA information Analysis, Human Genome Centre, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | | | - Hein Schepers
- Department of Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Geert Huls
- Department of Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - André B Mulder
- Department of Laboratory Medicine, University Medical Center Groningen, University of Groningen, The Netherlands
| | - Seishi Ogawa
- Department of Pathology & Tumor Biology, Kyoto University, Kyoto, Japan
- Institute for the Advanced Study of Human Biology, Kyoto University, Kyoto, Japan; and
- Department of Medicine, Centre for Haematology and Regenerative Medicine, Karolinksa Institute, Stockholm, Sweden
| | - Joost H A Martens
- Department of Molecular Biology, Radboud University, Nijmegen, The Netherlands
| | | | - Edo Vellenga
- Department of Hematology, Cancer Research Center Groningen, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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9
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Mimiola E, Bomben R, De Matteis G, Perbellini O, Guglielmelli P, Bonifacio M, Parisi A, Gattei V, Zamò A, Mannelli F, García Montero AC, Zanotti R. Systemic mastocytosis associated with myelodysplastic/myeloproliferative neoplasms with ring sideroblasts and thrombocytosis: Report of three cases. Hematol Oncol 2019; 37:628-633. [PMID: 31523839 DOI: 10.1002/hon.2680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 09/04/2019] [Accepted: 09/12/2019] [Indexed: 12/30/2022]
Abstract
The association of systemic mastocytosis with another hematologic neoplasia of myeloid or lymphoid origin is recognized as an advanced subvariant of mastocytosis. Here, we report the association of indolent or smoldering systemic mastocytosis with three cases of myelodysplastic/myeloproliferative neoplasms with ring sideroblasts and thrombocytosis, a recently recognized disease characterized by SF3B1 mutations. The hierarchical pattern of KIT, SF3B1, JAK2, and additional mutations was studied in whole and fractionated subpopulations of peripheral blood cells and whole bone marrow. In two cases, we could demonstrate a multilineage D816V KIT mutation, involving all myeloid lineages in one patient and also the lymphoid series in the other. Two patients displaying both SF3B1 and V617F JAK2 mutations had a very poor prognosis. Another patient bearing SF3B1, but not V617F JAK2 mutation, had a favorable response to erythropoietin treatment and long survival.
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Affiliation(s)
- Elda Mimiola
- Section of Hematology, Multidisciplinary Outpatients Clinics for Mastocytosis, Department of Medicine, AOUI, Verona, Italy
- Department of Immunohematology and Transfusion Medicine, ASST, Mantova, Italy
| | - Riccardo Bomben
- Clinical and Experimental Onco-Hematology Unit, Centro di Riferimento Oncologico, IRCCS, Aviano, Italy
| | - Giovanna De Matteis
- Section of Clinical Biochemistry, Department of Life and Reproduction Sciences, AOUI, Verona, Italy
| | - Omar Perbellini
- Department of Cell Therapy and Hematology, Ospedale San Bortolo, Vicenza, Italy
| | - Paola Guglielmelli
- Center of Research and Innovation of Myeloproliferative Neoplasms, Careggi University Hospital, Florence, Italy
| | - Massimiliano Bonifacio
- Section of Hematology, Multidisciplinary Outpatients Clinics for Mastocytosis, Department of Medicine, AOUI, Verona, Italy
| | | | - Valter Gattei
- Clinical and Experimental Onco-Hematology Unit, Centro di Riferimento Oncologico, IRCCS, Aviano, Italy
| | - Alberto Zamò
- Department of Oncology, University of Turin, Turin, Italy
| | - Francesco Mannelli
- Center of Research and Innovation of Myeloproliferative Neoplasms, Careggi University Hospital, Florence, Italy
| | | | - Roberta Zanotti
- Section of Hematology, Multidisciplinary Outpatients Clinics for Mastocytosis, Department of Medicine, AOUI, Verona, Italy
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10
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Paredes BD, Martins GLS, Azevedo CM, Sampaio GLDA, Nonaka CKV, Silva KND, Soares MBP, Santos RRD, Souza BSDF. Generation of three control iPS cell lines for sickle cell disease studies by reprogramming erythroblasts from individuals without hemoglobinopathies. Stem Cell Res 2019; 38:101454. [PMID: 31078962 DOI: 10.1016/j.scr.2019.101454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/22/2019] [Accepted: 04/29/2019] [Indexed: 11/18/2022] Open
Abstract
Sickle cell disease (SCD) is one of the most prevalent and severe monogenetic disorders. Previously, we generated iPS cell lines from SCD patients. Here, we generated iPS cell lines from three age-, ethnicity- and gender-matched healthy individuals as control cell lines. Cell reprogramming was performed using erythroblasts expanded from PBMC by a non-integrative method. SCD-iPSC controls expressed pluripotency markers, presented a normal karyotype, were able to differentiate into the three germ layers in embryoid body spontaneous differentiation and confirmed to be integration-free. The cell lines generated here may be used as matched healthy controls for SCD studies.
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Affiliation(s)
- Bruno Diaz Paredes
- São Rafael Hospital, D'Or Institute for Research and Education (IDOR), Salvador, BA, Brazil; National Institute of Science and Technology for Regenerative Medicine, Rio de Janeiro, RJ, Brazil
| | - Gabriele Louise Soares Martins
- São Rafael Hospital, D'Or Institute for Research and Education (IDOR), Salvador, BA, Brazil; Gonçalo Moniz Institute, FIOCRUZ, Salvador, BA, Brazil
| | | | - Gabriela Louise de Almeida Sampaio
- São Rafael Hospital, D'Or Institute for Research and Education (IDOR), Salvador, BA, Brazil; Gonçalo Moniz Institute, FIOCRUZ, Salvador, BA, Brazil
| | - Carolina Kymie Vasques Nonaka
- São Rafael Hospital, D'Or Institute for Research and Education (IDOR), Salvador, BA, Brazil; Gonçalo Moniz Institute, FIOCRUZ, Salvador, BA, Brazil
| | - Katia Nunes da Silva
- São Rafael Hospital, D'Or Institute for Research and Education (IDOR), Salvador, BA, Brazil; National Institute of Science and Technology for Regenerative Medicine, Rio de Janeiro, RJ, Brazil
| | - Milena Botelho Pereira Soares
- Gonçalo Moniz Institute, FIOCRUZ, Salvador, BA, Brazil; National Institute of Science and Technology for Regenerative Medicine, Rio de Janeiro, RJ, Brazil
| | - Ricardo Ribeiro Dos Santos
- Gonçalo Moniz Institute, FIOCRUZ, Salvador, BA, Brazil; National Institute of Science and Technology for Regenerative Medicine, Rio de Janeiro, RJ, Brazil
| | - Bruno Solano de Freitas Souza
- São Rafael Hospital, D'Or Institute for Research and Education (IDOR), Salvador, BA, Brazil; Gonçalo Moniz Institute, FIOCRUZ, Salvador, BA, Brazil; National Institute of Science and Technology for Regenerative Medicine, Rio de Janeiro, RJ, Brazil.
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11
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Zhao Y, Li X, Zhao W, Wang J, Yu J, Wan Z, Gao K, Yi G, Wang X, Fan B, Wu Q, Chen B, Xie F, Wu J, Zhang W, Chen F, Yang H, Wang J, Xu X, Li B, Liu S, Hou Y, Liu X. Single-cell transcriptomic landscape of nucleated cells in umbilical cord blood. Gigascience 2019; 8:giz047. [PMID: 31049560 PMCID: PMC6497034 DOI: 10.1093/gigascience/giz047] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 01/30/2019] [Accepted: 04/01/2019] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND For both pediatric and adult patients, umbilical cord blood (UCB) transplant is a therapeutic option for a variety of hematologic diseases, such as blood cancers, myeloproliferative disorders, genetic diseases, and metabolic disorders. However, the level of cellular heterogeneity and diversity of nucleated cells in UCB has not yet been assessed in an unbiased and systemic fashion. In the present study, nucleated cells from UCB were subjected to single-cell RNA sequencing to simultaneously profile the gene expression signatures of thousands of cells, generating a rich resource for further functional studies. Here, we report the transcriptomes of 17,637 UCB cells, covering 12 major cell types, many of which can be further divided into distinct subpopulations. RESULTS Pseudotemporal ordering of nucleated red blood cells identifies wave-like activation and suppression of transcription regulators, leading to a polarized cellular state, which may reflect nucleated red blood cell maturation. Progenitor cells in UCB also comprise 2 subpopulations with activation of divergent transcription programs, leading to specific cell fate commitment. Detailed profiling of cytotoxic cell populations unveiled granzymes B and K signatures in natural killer and natural killer T-cell types in UCB. CONCLUSIONS Taken together, our data form a comprehensive single-cell transcriptomic landscape that reveals previously unrecognized cell types, pathways, and mechanisms of gene expression regulation. These data may contribute to the efficacy and outcome of UCB transplant, broadening the scope of research and clinical innovations.
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Affiliation(s)
- Yi Zhao
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
- BGI-Shenzhen, Shenzhen 518083, China
| | - Xiao Li
- BGI-Shenzhen, Shenzhen 518083, China
| | - Weihua Zhao
- Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen 518035, Guangdong Province, China
| | | | - Jiawei Yu
- BGI-Shenzhen, Shenzhen 518083, China
| | - Ziyun Wan
- BGI-Shenzhen, Shenzhen 518083, China
| | - Kai Gao
- BGI-Shenzhen, Shenzhen 518083, China
| | - Gang Yi
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, Shanghai 200025, China
| | - Xie Wang
- BGI-Shenzhen, Shenzhen 518083, China
| | - Bingbing Fan
- Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University, Shenzhen 518035, Guangdong Province, China
| | - Qinkai Wu
- BGI-Shenzhen, Shenzhen 518083, China
| | | | - Feng Xie
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, Shanghai 200025, China
| | | | - Wei Zhang
- BGI-Shenzhen, Shenzhen 518083, China
| | - Fang Chen
- BGI-Shenzhen, Shenzhen 518083, China
| | - Huanming Yang
- BGI-Shenzhen, Shenzhen 518083, China
- James D. Watson Institute of Genome Sciences, Hangzhou 310058, China
| | - Jian Wang
- BGI-Shenzhen, Shenzhen 518083, China
- James D. Watson Institute of Genome Sciences, Hangzhou 310058, China
| | - Xun Xu
- BGI-Shenzhen, Shenzhen 518083, China
| | - Bin Li
- BGI-Shenzhen, Shenzhen 518083, China
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, Shanghai 200025, China
- Department of Immunology and Microbiology, Shanghai JiaoTong University School of Medicine, Shanghai 200025, China
| | | | - Yong Hou
- BGI-Shenzhen, Shenzhen 518083, China
| | - Xiao Liu
- BGI-Shenzhen, Shenzhen 518083, China
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12
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Bello E, Kerry J, Singh S, Yip BH, Kušec R, Killick S, Raynaud S, Boultwood J, Pellagatti A. L-leucine increases translation of RPS14 and LARP1 in erythroblasts from del(5q) myelodysplastic syndrome patients. Haematologica 2018; 103:e496-e500. [PMID: 29903759 PMCID: PMC6278984 DOI: 10.3324/haematol.2018.190447] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Erica Bello
- Bloodwise Molecular Haematology Unit, Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, and Oxford BRC Haematology Theme, UK
| | - Jonathan Kerry
- Medical Research Council (MRC) Molecular Hematology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, UK
| | - Shalini Singh
- Bloodwise Molecular Haematology Unit, Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, and Oxford BRC Haematology Theme, UK
| | - Bon Ham Yip
- Bloodwise Molecular Haematology Unit, Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, and Oxford BRC Haematology Theme, UK
| | - Rajko Kušec
- Dubrava University Hospital and Zagreb School of Medicine, University of Zagreb, Croatia
| | - Sally Killick
- Department of Haematology, Royal Bournemouth Hospital, UK
| | | | - Jacqueline Boultwood
- Bloodwise Molecular Haematology Unit, Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, and Oxford BRC Haematology Theme, UK
| | - Andrea Pellagatti
- Bloodwise Molecular Haematology Unit, Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, and Oxford BRC Haematology Theme, UK
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13
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Thanuthanakhun N, Nuntakarn L, Sampattavanich S, Anurathapan U, Phuphanitcharoenkun S, Pornpaiboonstid S, Borwornpinyo S, Hongeng S. Investigation of FoxO3 dynamics during erythroblast development in β-thalassemia major. PLoS One 2017; 12:e0187610. [PMID: 29099866 PMCID: PMC5669432 DOI: 10.1371/journal.pone.0187610] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 10/23/2017] [Indexed: 02/08/2023] Open
Abstract
The FoxO3 transcription factor is a key regulator of oxidative stress and erythroid maturation during erythropoiesis. In this study, we explored the involvement of FoxO3 in severe β-thalassemia. Using primary CD34+ hematopoietic progenitor cells from patients with β-thalassemia major, we successfully developed an in vitro model of ineffective erythropoiesis. Based on this model, FoxO3 activity was quantified in single cells using high throughput imaging flow cytometry. This study revealed a significant reduction of FoxO3 activity during the late stage of erythroblast differentiation in β-thalassemia, in contrast to erythropoiesis in normal cells that maintain persistent activation of FoxO3. In agreement with the decreased FoxO3 activity in β-thalassemia, the expression of FoxO3 target genes was also found to decrease, concurrent with elevated phosphorylation of AKT, most clearly at the late stage of erythroid differentiation. Our findings provide further evidence for the involvement of FoxO3 during terminal erythropoiesis and confirm the modulation of the PI3K/AKT pathway as a potential therapeutic strategy for β-thalassemia.
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Affiliation(s)
| | - Lalana Nuntakarn
- Department of Obstetrics and Gynecology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Somponnat Sampattavanich
- Siriraj Laboratory for Systems Pharmacology, Department of Pharmacology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Usanarat Anurathapan
- Department of Pediatrics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | | | | | - Suparerk Borwornpinyo
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand
- Excellent Center for Drug Discovery, Faculty of Science, Mahidol University, Bangkok, Thailand
- * E-mail: (SB); (SH)
| | - Suradej Hongeng
- Department of Pediatrics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
- Excellent Center for Drug Discovery, Faculty of Science, Mahidol University, Bangkok, Thailand
- * E-mail: (SB); (SH)
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14
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Montalvão MF, de Souza JM, Guimarães ATB, de Menezes IPP, Castro ALDS, Rodrigues ASDL, Malafaia G. The genotoxicity and cytotoxicity of tannery effluent in bullfrog (Lithobates catesbeianus). Chemosphere 2017; 183:491-502. [PMID: 28570892 DOI: 10.1016/j.chemosphere.2017.05.080] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 05/02/2017] [Accepted: 05/13/2017] [Indexed: 06/07/2023]
Abstract
Some of the most polluting activities occur in bovine skin processing. Tannery generates effluents containing high concentrations of heavy metals and organic compounds. The phases composing the leather production process generate a large volume of tannery effluents that are often discarded in aquatic environments without any previous treatment. However, the effect these xenobiotics have on adult representatives belonging to the class Amphibia remains unknown. Thus, the aim of the present study is to assess the geno- and cytotoxic effects of tannery effluent on adult male bullfrogs (Lithobates castesbeianus) exposed to it. Accordingly, the animals were divided into the following groups: negative control (tannery effluent-free water), positive control (cyclophosphamide), and effluent (water added with 5% tannery effluent). The animals were euthanized for blood collection, and erythrocyte analyses were conducted after 35 and 90 days of exposure. The micronuclei (MN) frequency and the frequency of other nuclear abnormalities in each of the animals in the experimental groups were assessed in 2000 erythrocytes. According to the present results, the exposure to tannery effluents increased MN frequency as well as other nuclear abnormalities (i.e., lobed nuclei, binucleated cell, kidney-shaped nuclei, notched nuclei, and apoptotic cell) in the erythrocytes of animals in the effluent group and in the positive control group after 35 and 90 exposure days. Thus, the current study corroborated the hypothesis that the tannery effluent has aneugenic and clastogenic potential in adult male bullfrogs (L. castesbeianus). The present study is the first to report such effect.
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Affiliation(s)
| | - Joyce Moreira de Souza
- Programa de Pós-Graduação em Conservação de Recursos Naturais do Cerrado and Laboratório de Pesquisas Biológicas, Instituto Federal Goiano - Campus Urutaí, GO, Brazil
| | - Abraão Tiago Batista Guimarães
- Programa de Pós-Graduação em Conservação de Recursos Naturais do Cerrado and Laboratório de Pesquisas Biológicas, Instituto Federal Goiano - Campus Urutaí, GO, Brazil
| | - Ivandilson Pessoa Pinto de Menezes
- Departamento de Ciências Biológicas, Laboratório de Genética e Biologia Molecular and Programa de Pós-Graduação em Conservação de Recursos Naturais do Cerrado, Instituto Federal Goiano - Campus Urutaí, GO, Brazil
| | - André Luis da Silva Castro
- Departamento de Ciências Biológicas, Laboratório de Zoologia and Programa de Pós-Graduação em Conservação de Recursos Naturais do Cerrado, Instituto Federal Goiano - Campus Urutaí, GO, Brazil
| | - Aline Sueli de Lima Rodrigues
- Departamento de Ciências Biológicas, Laboratório de Pesquisas Biológicas and Programa de Pós-Graduação em Conservação de Recursos Naturais do Cerrado, Instituto Federal Goiano - Campus Urutaí, GO, Brazil
| | - Guilherme Malafaia
- Departamento de Ciências Biológicas, Laboratório de Pesquisas Biológicas and Programa de Pós-Graduação em Conservação de Recursos Naturais do Cerrado, Instituto Federal Goiano - Campus Urutaí, GO, Brazil; Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Goiás - Campus Samambaia, GO, Brazil.
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15
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Awoyemi OV, Okotie UJ, Oyagbemi AA, Omobowale TO, Asenuga ER, Ola-Davies OE, Ogunpolu BS. Cobalt chloride exposure dose-dependently induced hepatotoxicity through enhancement of cyclooxygenase-2 (COX-2)/B-cell associated protein X (BAX) signaling and genotoxicity in Wistar rats. Environ Toxicol 2017; 32:1899-1907. [PMID: 28303633 DOI: 10.1002/tox.22412] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 02/17/2017] [Accepted: 02/21/2017] [Indexed: 06/06/2023]
Abstract
Cobalt chloride (CoCl2 ) is one of the many environmental contaminants, used in numerous industrial sectors. It is a pollutant with deadly toxicological consequences both in developing and developed countries. We investigated toxicological impact of CoCl2 on hepatic antioxidant status, apoptosis, and genotoxicity. Forty Wistar rats were divided into four groups, 10 rats per group: Group 1 served as control and received clean tap water orally; Group 2 received CoCl2 solution (150 mg/L); Group 3 received CoCl2 solution (300 mg/L); and Group 4 received CoCl2 (600 mg/L) in drinking water for 7 days, respectively. Exposure of rats to CoCl2 led to a significant decline in hepatic antioxidant enzymes together with significant increase in markers of oxidative stress. Immunohistochemistry revealed dose-dependent increase in cyclooxygenase-2 and BAX expressions together with increased frequency of Micronucleated Polychromatic Erythrocytes. Combining all, CoCl2 administration led to hepatic damage through induction of oxidative stress, inflammation, and apoptosis.
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Affiliation(s)
| | - Ufuoma Jowafe Okotie
- Federal College of Animal Health and Production Technology, Moor Plantation, Ibadan, Nigeria
| | - Ademola Adetokunbo Oyagbemi
- Department of Veterinary Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Temidayo Olutayo Omobowale
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Ebunoluwa Racheal Asenuga
- Department of Veterinary Biochemistry, Faculty of Veterinary Medicine, University of Benin, Benin, Nigeria
| | - Olufunke Eunice Ola-Davies
- Department of Veterinary Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Blessing Seun Ogunpolu
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
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16
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Klei TRL, Kheradmand Kia S, Veldthuis M, Beuger BM, Geissler J, Dehbozorgian J, Karimi M, van Bruggen R, van Zwieten R. Residual pyruvate kinase activity in PKLR-deficient erythroid precursors of a patient suffering from severe haemolytic anaemia. Eur J Haematol 2017; 98:584-589. [PMID: 28295642 DOI: 10.1111/ejh.12874] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/03/2017] [Indexed: 01/19/2023]
Abstract
OBJECTIVE Here, we present a 7-year-old patient suffering from severe haemolytic anaemia. The most common cause of chronic hereditary non-spherocytic haemolytic anaemia is red blood cell pyruvate kinase (PK-R) deficiency. Because red blood cells rely solely on glycolysis to generate ATP, PK-R deficiency can severely impact energy supply and cause reduction in red blood cell lifespan. We determined the underlying cause of the anaemia and investigated how erythroid precursors in the patient survive. METHODS PK activity assays, Western blot and Sanger sequencing were employed to determine the underlying cause of the anaemia. Patient erythroblasts were cultured and reticulocytes were isolated to determine PK-R and PKM2 contribution to glycolytic activity during erythrocyte development. RESULTS We found a novel homozygous mutation (c.583G>A) in the PK-R coding gene (PKLR). Although this mutation did not influence PKLR mRNA production, no PK-R protein could be detected in the red blood cells nor in its precursors. In spite of the absence of PK-R, the reticulocytes of the patient exhibited 20% PK activity compared with control. Western blotting revealed that patient erythroid precursors, like controls, express residual PKM2. CONCLUSIONS We conclude that PKM2 rescues glycolysis in PK-R-deficient erythroid precursors.
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MESH Headings
- Anemia, Hemolytic, Congenital Nonspherocytic/enzymology
- Anemia, Hemolytic, Congenital Nonspherocytic/genetics
- Anemia, Hemolytic, Congenital Nonspherocytic/pathology
- Base Sequence
- Carrier Proteins/genetics
- Cell Differentiation
- Child
- Consanguinity
- Erythroblasts/enzymology
- Erythroblasts/pathology
- Gene Expression
- Glycolysis/genetics
- Homozygote
- Humans
- Male
- Membrane Proteins/deficiency
- Membrane Proteins/genetics
- Mutation
- Myeloid Cells/cytology
- Myeloid Cells/enzymology
- Primary Cell Culture
- Pyruvate Kinase/deficiency
- Pyruvate Kinase/genetics
- Pyruvate Metabolism, Inborn Errors/enzymology
- Pyruvate Metabolism, Inborn Errors/genetics
- Pyruvate Metabolism, Inborn Errors/pathology
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Reticulocytes/enzymology
- Reticulocytes/pathology
- Thyroid Hormones/deficiency
- Thyroid Hormones/genetics
- Thyroid Hormone-Binding Proteins
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Affiliation(s)
- Thomas R L Klei
- Sanquin Research and Landsteiner Laboratory, Department of Blood Cell Research, University of Amsterdam, Amsterdam, The Netherlands
| | - Sima Kheradmand Kia
- Laboratory for Red Blood Cell Diagnostics, Sanquin, Amsterdam, The Netherlands
- Sara Medical Genetics Centre, Tehran, Iran
| | - Martijn Veldthuis
- Laboratory for Red Blood Cell Diagnostics, Sanquin, Amsterdam, The Netherlands
| | - Boukje M Beuger
- Sanquin Research and Landsteiner Laboratory, Department of Blood Cell Research, University of Amsterdam, Amsterdam, The Netherlands
| | - Judy Geissler
- Laboratory for Red Blood Cell Diagnostics, Sanquin, Amsterdam, The Netherlands
| | | | - Mehran Karimi
- Hematology Research Centre, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Robin van Bruggen
- Sanquin Research and Landsteiner Laboratory, Department of Blood Cell Research, University of Amsterdam, Amsterdam, The Netherlands
| | - Rob van Zwieten
- Sanquin Research and Landsteiner Laboratory, Department of Blood Cell Research, University of Amsterdam, Amsterdam, The Netherlands
- Laboratory for Red Blood Cell Diagnostics, Sanquin, Amsterdam, The Netherlands
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Uchida T, Hagihara M, Hua J, Inoue M. The effects of azacitidine on the response and prognosis of myelodysplastic syndrome and acute myeloid leukemia involving a bone marrow erythroblast frequency of >50. Leuk Res 2016; 53:35-38. [PMID: 28013105 DOI: 10.1016/j.leukres.2016.11.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 11/18/2016] [Accepted: 11/21/2016] [Indexed: 12/23/2022]
Abstract
We reviewed the cases of 68 consecutive patients who were diagnosed with myelodysplastic syndrome (MDS, n=61) or acute erythroleukemia (AEL, n=7) according to the World Health Organization (WHO) 2008 criteria and had previously been treated with azacitidine, a hypomethylating agent. Fifteen MDS patients had bone marrow erythroblast frequencies of ≥50%, and 6 out of the 7 AEL patients were reclassified as MDS (refractory anemia with excess blasts [RAEB]-1: 1, RAEB-2: 5) according to the revised WHO 2016 criteria. There was no difference between the overall response ratio (41%), as determined by a hematological improvement in at least one of 3 lineages, of these erythroid rich patients and that of the control group, which comprised 46 MDS patients with bone marrow erythroblast frequencies of <50%. Three MDS patients that exhibited erythroid predominance achieved complete remission. The overall survival period (median: 15 months) of the erythroblast-predominant group was not inferior to that of the control group (median: 16 months). These results indicate that azacitidine is a promising treatment option for MDS/AEL irrespective of the numbers of erythroid cells in the patient's bone marrow.
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Affiliation(s)
- Tomoyuki Uchida
- Depatment of Hematology, Eiju General Hospital, Higashi-Ueno 2-23-16, Japan
| | - Masao Hagihara
- Depatment of Hematology, Eiju General Hospital, Higashi-Ueno 2-23-16, Japan.
| | - Jian Hua
- Depatment of Hematology, Eiju General Hospital, Higashi-Ueno 2-23-16, Japan
| | - Morihiro Inoue
- Depatment of Hematology, Eiju General Hospital, Higashi-Ueno 2-23-16, Japan
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Kuznetsov ME, Kurenkov EL, Zakharov YM. [ERYTHROKARIOCYTES APOPTO- TIC ACTIVITY IN ERYTHROBLASTIC ISLANDS OF RATS BONE MARROW]. Ross Fiziol Zh Im I M Sechenova 2016; 102:1216-1223. [PMID: 30193439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The functional activity of bcl-2 andp53 proteins in erythrokariocytes of erythroblastic islands (EI) of various classes of bone marrow belonging to intact rats and animals following an acute blood loss were investigated. It is observed that intact rats had the elevated levels of percent content of bcl-2+ erythrokariocytes in EI of the second maturity class, compared to EI of first maturity class and EI involutionary class, and also less in the EI involutionary class compared to EI 1 and EI 2. The percentage content of p53+ erythrokariocytes in intact rats in the EI 2 class was less than in EI 1 and EI involutionary class, and were nearly the same of EI 1, EI 3, EI involutionary class and EI reconstructed. 48 hours after blood loss, the content of bcl-2+ erythrokariocytes were increased in EI 1, EI 2, and EI reconstructed.
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Tishevskaya NV. [COMPARATIVE ANALYSIS OF REPOA (EPOKRIN) AND REPOB (RECORMON) INFLUENCE ON ERYTHROPOIESIS IN VIVO AND IN VITRO]. Eksp Klin Farmakol 2016; 79:24-28. [PMID: 27416679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The study performed on erythroblastic island cultures and rats with experimental polycythemia showed that recormon and epokrin stimulated erythropoiesis in erythroblastic islands both in vitro and in vivo. In cell cultures, recormon activates the formation of erythroblastic islands de novo and de repeto 1.3 times better than epokrin (p < 0.05). Erythroid cells exbhibited same reaction to epokrin and recormon in vivo: the number of erythroblastic islands in the bone marrow increased 3.4 times (p < 0.05) and the number of reticulocytes in the blood increased 2.2 times (p < 0.05).
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Monteiro Júnior JGDM, Torres DDOC, da Silva MCFC, Ramos TMDB, Alves ML, Filho WJN, Damasceno EP, Brunet AF, Bittencourt MS, Pedrosa RP, Filho DCS. Nucleated Red Blood Cells as Predictors of All-Cause Mortality in Cardiac Intensive Care Unit Patients: A Prospective Cohort Study. PLoS One 2015; 10:e0144259. [PMID: 26713613 PMCID: PMC4695082 DOI: 10.1371/journal.pone.0144259] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 11/16/2015] [Indexed: 12/21/2022] Open
Abstract
Background The presence of nucleated red blood cells (NRBCs) in the peripheral blood of critically ill patients is associated with a poorer prognosis, though data on cardiovascular critical care patients is lacking. The aim of the present study was to assess the role of NRBCs as a predictor of intensive care unit (ICU) and in hospital all-cause mortality among cardiologic patients. Methods NRBCs were measured daily in consecutive cardiac ICU patients, including individuals with both coronary and non-coronary acute cardiac care. We excluded patients younger than 18 years, with cancer or hematological disease, on glucocorticoid therapy, those that were readmitted after hospital discharge and patients who died in the first 24 hours after admission. We performed a multiple logistic analysis to identify independent predictors of mortality. Results We included 152 patients (60.6 ± 16.8 years, 51.8% female, median ICU stay of 7 [4–11] days). The prevalence of NRBCs was 54.6% (83/152). The presence of NRBC was associated with a higher ICU mortality (49.4% vs 21.7%, P<0.001) as well as in-hospital mortality (61.4% vs 33.3%, p = 0.001). NRBC were equally associated with mortality among coronary disease (64.71% vs 32.5% [OR 3.80; 95%CI: 1.45–10.0; p = 0.007]) and non-coronary disease patients (61.45% vs 33.3% [OR 3.19; 95%CI: 1.63–6.21; p<0.001]). In a multivariable model, the inclusion of NRBC to the APACHE II score resulted in a significant improvement in the discrimination (p = 0.01). Conclusions NRBC are predictors of all-cause in-hospital mortality in patients admitted to a cardiac ICU. This predictive value is independent and complementary to the well validated APACHE II score.
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Affiliation(s)
| | | | | | | | | | - Wellington Jorge Nunes Filho
- Coronary Care Unit of PROCAPE (Pernambuco Cardiac Emergency Hospital), University of Pernambuco (UPE), Recife, Pernambuco, Brazil
| | - Edgar Paulo Damasceno
- Coronary Care Unit of PROCAPE (Pernambuco Cardiac Emergency Hospital), University of Pernambuco (UPE), Recife, Pernambuco, Brazil
| | - Antônio Fernandes Brunet
- Coronary Care Unit of PROCAPE (Pernambuco Cardiac Emergency Hospital), University of Pernambuco (UPE), Recife, Pernambuco, Brazil
| | | | - Rodrigo Pinto Pedrosa
- Coronary Care Unit of PROCAPE (Pernambuco Cardiac Emergency Hospital), University of Pernambuco (UPE), Recife, Pernambuco, Brazil
| | - Dário Celestino Sobral Filho
- Coronary Care Unit of PROCAPE (Pernambuco Cardiac Emergency Hospital), University of Pernambuco (UPE), Recife, Pernambuco, Brazil
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Sugano H, Kawaguchi T, Furusawa M, Ikawa Y. Differentiation of Friend virus-induced leukemia cells. Bibl Haematol 2015:221-8. [PMID: 1164397 DOI: 10.1159/000397536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A long-term cultured Friend leukemia cell is able to differentiate along the erythrocytic series following treatment with some substances and that can be demonstrated by a conjugated erythrocyte membrane-specific antibody technique. Differentiation is induced by inhibition of DNA synthesis and by dimethylsulfoxide (DMSO), erythropoietin (EP) and Vitamin B12 (B12), and other agents. The effective substances were divided into 2 groups by the mode of differentiation of Friend cells. A differentiated state continues for several days when cells are re-cultured in the medium without substances. The decreased tumorigenecity of differentiated cells is proved by back transplantation to mice.
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Furusawa M. Erythroid "differentiation" of Friend cells. Bibl Haematol 2015:273-4. [PMID: 51623 DOI: 10.1159/000397543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Bârsan L, Stanciu A, Stancu S, Căpuşă C, Brătescu L, Mandache E, Radu E, Mircescu G. Bone marrow iron distribution, hepcidin, and ferroportin expression in renal anemia. ACTA ACUST UNITED AC 2015; 20:543-52. [PMID: 25745821 DOI: 10.1179/1607845415y.0000000004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVES The hepcidin-ferroportin system is involved in both conditions associated with iron-restricted erythropoiesis in renal anemia: iron deficiency and anemia of chronic disorders. As serum hepcidin could aid diagnosis, we investigated its relationships with bone marrow iron distribution, hepcidin-ferroportin expression in bone marrow cells, and peripheral iron indices in non-dialysis chronic kidney disease (CKD) patients. METHODS Fifty-four epoetin and iron naive CKD patients entered this prospective, observational study. According to bone marrow iron distribution (iliac crest biopsy, Perls' stain), 26 had iron deficiency anemia, 21 anemia of chronic disorders and 7 had normal iron stores. Medullar hepcidin and ferroportin expression (immunofluorescence (IF), semiquantitative scales) and serum hepcidin (Hep25 - ELISA) were the main studied parameters. RESULTS Low hepcidin and high ferroportin expression by erythroblast and macrophage were seen in iron deficiency anemia, while the opposites were true in anemia of chronic disorders. In regression analysis, higher Hep25 and ferritin predicted hepcidin expression (R(2)=0.48; P < 0.0001), while lower ferritin and Hep25 - predicted ferroportin expression (R(2) = 0.29; P = 0.003) by erythroblast; inflammation had no contribution. In ROC analysis, serum hepcidin and ferritin had similar moderate utility in differentiating iron deficiency anemia from anemia of chronic disorders (AUC 0.63 95% CI 0.47-0.79 and 0.76 95% CI 0.61-0.90, respectively). CONCLUSIONS Thus, in anemic epoetin naive non-dialysis CKD patients, hepcidin and ferroportin expression by erythroblast and macrophage are closely related to bone marrow iron distribution. Although the hepcidin-ferroportin system seems regulated by ferritin-driven Hep25, serum hepcidin and peripheral iron indices are of little help in describing bone marrow iron status.
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Sadahira Y, Sugihara T, Fujiwara H, Nishimura H, Suetsugu Y, Takeshita M, Okamura S, Goto M. WRN protein as a novel erythroblast immunohistochemical marker with applications for the diagnosis of Werner syndrome. Virchows Arch 2014; 466:343-50. [PMID: 25503078 DOI: 10.1007/s00428-014-1703-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 11/18/2014] [Accepted: 12/01/2014] [Indexed: 11/25/2022]
Abstract
Genetic testing for mutations in the WRN gene is critical for the diagnosis of Werner syndrome (WS); however, these tests cannot be performed in a clinical setting. Nearly all of the WRN mutations result in expression of truncated WRN proteins that are missing the C-terminal nuclear localization signal. We evaluated the use of WRN protein immunohistochemistry for diagnosing WS using paraffin-embedded bone marrow sections. Using a well-defined commercially available polyclonal antibody against the C terminus of WRN, we found that of all the cell types tested, bone marrow erythroid precursors showed the strongest nuclear expression of WRN. Immunohistochemical analysis of bone marrow samples from 120 patients with non-WS hematological disorders (age range, 7 days-90 years) revealed WRN staining of the nuclei of CD71-positive early and late erythroid precursors. Erythroblasts negative for WRN immunostaining were only observed in two patients, both of whom were diagnosed with WS: one with concomitant myelodysplastic syndrome and the other with erythroleukemia with overexpression of TP53. Western blot analysis and immunocytochemistry indicated WRN was localized in the nuclei of the four positive control cell lines from non-WS patients but not in the five cell lines from WS patients, who had three different types of WRN mutations. Thus, immunohistochemical detection of WRN in erythroblasts from bone marrow paraffin sections could be useful in screening of WS cases and worthy of further molecular confirmation.
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Affiliation(s)
- Yoshito Sadahira
- Department of Pathology, Kawasaki Medical School, 577 Matsushima, Kurashiki, Okayama, 701-0192, Japan,
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Usenko T, Chan G, Torlakovic E, Klingmüller U, Neel BG. Leukemogenic Ptpn11 allele causes defective erythropoiesis in mice. PLoS One 2014; 9:e109682. [PMID: 25289670 PMCID: PMC4188809 DOI: 10.1371/journal.pone.0109682] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 09/05/2014] [Indexed: 02/04/2023] Open
Abstract
Src homology 2 (SH2) domain-containing phosphatase 2 (SHP2), encoded by PTPN11, regulates signaling networks and cell fate in many tissues. Expression of oncogenic PTPN11 in the hematopoietic compartment causes myeloproliferative neoplasm (MPN) in humans and mice. However, the stage-specific effect(s) of mutant Ptpn11 on erythroid development have remained unknown. We found that expression of an activated, leukemogenic Ptpn11 allele, Ptpn11D61Y, specifically in the erythroid lineage causes dyserythropoiesis in mice. Ptpn11D61Y progenitors produce excess cKIT+CD71+Ter119− cells and aberrant numbers of cKITl°CD71+ erythroblasts. Mutant erythroblasts show elevated activation of ERK, AKT and STAT3 in response to EPO stimulation, and MEK inhibitor treatment blocks Ptpn11D61Y-evoked erythroid hyperproliferation in vitro. Thus, the expression of oncogenic Ptpn11 causes dyserythropoiesis in a cell-autonomous manner in vivo.
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Affiliation(s)
- Tatiana Usenko
- Princess Margaret Cancer Center, University Health Network, Toronto, Canada
| | - Gordon Chan
- Princess Margaret Cancer Center, University Health Network, Toronto, Canada
| | - Emina Torlakovic
- Department of Laboratory Hematology, Toronto General Hospital, University Health Network, Toronto, Canada
| | - Ursula Klingmüller
- Systems Biology of Signal Transduction, German Cancer Research Center (DKFZ), DKFZ-ZMBH-Alliance, Heidelberg, Germany
| | - Benjamin G. Neel
- Princess Margaret Cancer Center, University Health Network, Toronto, Canada
- Departments of Medical Biophysics and Biochemistry, University of Toronto, Toronto, Canada
- * E-mail:
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Zheng SL, Zheng T, Cheng X, Hao XK. Clinical application and evaluation of Sysmex XE-5000 analyser for detecting nucleated red blood cells in peripheral blood. Clin Lab 2014; 60:833-8. [PMID: 24839828 DOI: 10.7754/clin.lab.2013.130412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND To evaluate the performance of Sysmex XE-5000 analyser for detecting nucleated red blood cells (NRBCs) in peripheral blood and investigate the clinical application of this analyser. METHODS The absolute NRBC counts (NRBC#) and percentage (NRBC%) of 137 blood specimens (NRBC-positive according to the DIFF channel of the analyser) were determined in the NRBC channel of the analyser. The intra-assay imprecision, carryover rate, and linear range of the analyser were evaluated. The NRBC% of the blood sample was detected with a microscope, and the difference between two methods was analysed. RESULTS The intra-assay imprecision of the analyser for detecting NRBC# in specimens with high, moderate, and low Q-flag values were 2.10%, 3.26%, and 11.62%, respectively, and the imprecision for detecting NRBC% were 3.79%, 5.80%, and 13.33%, respectively. The carryover rates of the analyser for detecting NRBC# and NRBC% were 0.51% and 0.26%, respectively. CONCLUSIONS Sysmex XE-5000 analyser had good linearity in NRBC# (i.e., 0/L to 18 x 10(9)/L). The NRBC%s of the two methods did not significantly differ (p = 0.716). The analyser can completely replace the traditional microscope for clinically classifying and counting NRBCs.
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Wang YH, Fu R, Dong SW, Liu H, Shao ZH. Erythroblastic islands in the bone marrow of patients with immune-related pancytopenia. PLoS One 2014; 9:e95143. [PMID: 24740145 PMCID: PMC3989288 DOI: 10.1371/journal.pone.0095143] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Accepted: 03/24/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Immune-related pancytopenia (IRP) is characterized by pancytopenia caused by autoantibody-mediated bone marrow destruction or suppression. The bone marrows of IRP patients have remarkably increased erythroblastic islands (EIs). METHODOLOGY AND PRINCIPAL FINDINGS We determined the immunoglobulin G (IgG) autoantibodies in some parts of EIs of IRP patients using immunofluorescence to investigate the biological function of EIs with IgG in the pathophysiology of IRP. The dominant class of autoantibodies detected in mononuclear cells was IgG (CD34 IgG, CD15 IgG, and GlycoA IgG), specifically IgG on GlycoA-positive cells (GlycoA IgG). Results show that extravascular hemolysis occurred in IRP through IgG autoantibodies in the EIs. These data included a high percentage of reticulocytes in the peripheral blood, hypererythrocytosis in the bone marrow, and high serum bilirubin. Furthermore, we examined the macrophages in the bone marrow of IRP patients. The results show that the number of activated macrophages relatively increased, and the phagocytic activity of macrophages significantly increased. CONCLUSIONS AND SIGNIFICANCE Increased EIs with IgG were the sites of erythroblast phagocytosis by the activated macrophages, rather than erythropoietic niches. The IgG autoantibodies in the EIs possibly functioned as adhesion molecules for a ring of erythroblasts around the macrophages, thereby forming morphologic EIs.
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Affiliation(s)
- Yi-Hao Wang
- Department of Hematology, Tianjin Medical University General Hospital, Tianjin, China,
| | - Rong Fu
- Department of Hematology, Tianjin Medical University General Hospital, Tianjin, China,
| | - Shu-Wen Dong
- Department of Hematology, Tianjin Medical University General Hospital, Tianjin, China,
| | - Hui Liu
- Department of Hematology, Tianjin Medical University General Hospital, Tianjin, China,
| | - Zong-Hong Shao
- Department of Hematology, Tianjin Medical University General Hospital, Tianjin, China,
- * E-mail:
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Abstract
Although tumor angiogenesis in relation to cancer therapy has been widely investigated for more than four decades, its counterpart tumor hematopoiesis has not been equally considered. In that respect, in our long-term immunohistochemical examination of fetal hemoglobin (HbF) cells in various solid tumors, we have observed signs of fetal hematopoiesis in situ within the tumors. We hypothesize that this observed fetal hematopoiesis, involving angiogenesis, mirrors mammalian blood system development in the embryo and the fetus; this is consistent with the concept of the hemogenic endothelial progenitor, common to endothelial and hemopoietic cells. Based on this assumption, there should exist in tumors at least two routes of hematoangiogenesis: one of fetal (HbF) hematopoiesis and the other of adult (HbA) hematopoiesis, each one deserving a different therapeutic approach. In the fetal route, HbF should support tumor growth by virtue of its high oxygen affinity.
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Affiliation(s)
- Moshe Wolk
- Emeritus, Israel Ministry of Health, Central Laboratories , Jerusalem, Israel
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Rajpara A, Blackmon J, Laarman R, Skaggs R, Liolios A, Lui D, Fraga G. Preterm infant with a late presentation of blueberry muffin lesions secondary to recombinant erythropoietin. Dermatol Online J 2013; 19:19618. [PMID: 24050292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 09/13/2013] [Indexed: 06/02/2023] Open
Abstract
Our patient is a 26-week-old preterm female infant delivered by caesarean section secondary to severe maternal preeclampsia who had been receiving subcutaneous recombinant erythropoietin (r-EPO) for anemia of prematurity. At 8 weeks of age after 8 doses of r-EPO, the infant developed numerous non-blanching erythematous macules and patches located on the back, posterior shoulder, and posterior arms, concerning for late-onset blueberry muffin lesions. Biopsy of the lesions confirmed dermal hematopoiesis. After r-EPO was discontinued all skin lesions gradually resolved over a period of 2 weeks and never recurred.
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Sherazi SFH, Butt Z. Massive splenomegaly in acute erythroid leukaemia (FAB Class-M6): an unusual presentation. J PAK MED ASSOC 2012; 62:989-990. [PMID: 23139997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AML-M6 has a peak incidence in the seventh decade with slight male preponderance, and can also present at a younger age. The usual features are anaemia, thrombocytopenia, malaise, fatigue, easy bruising, epistaxis and petechiae. Splenomegaly may occur in 20-40 % of the cases but massive splenomegaly is rare presentation and have been only reported once in humans and once in animals. A 22 year Asian female, presented with fatigue, pallor, mild jaundice, exertional dyspnoea, epigastric pain, tender right hypochondrium and massive splenomegaly. Investigations revealed anaemia and thrombocytopenia, tear drop cells, basophilic stippling, piokilocytosis and anisochromia; increased uric acid and LDH. Abdominal ultrasound showed enlarged liver (22cm) and spleen (20cm). Bone marrow aspiration revealed 51% erythroid and 24% non-erythroid precursors, depressed leukopoeisis and megakarypoeisis. Erythroblasts were PAS and CD71 positive and also reacted to Antihaemoglobin-Antibody. This report highlights characteristic features and diagnostic criteria of erythroleukaemia, differential diagnosis of massive splenomegaly and their rare association.
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Abstract
BACKGROUND The immunohistochemical features of fetal haemoglobin cells and their distribution patterns in solid tumours, such as colorectal cancer and blastomas, suggest that fetal haemopoiesis may take place in these tumour tissues. These locally highly concentrated fetal haemoglobin (HbF) cells may promote tumour growth by providing a more efficient oxygen supply. METHODS AND RESULTS Biomarkers of HbF were checked in transitional cell carcinoma (TCC) of the urinary bladder, assessing this as a new parameter for disease management. Fetal haemoglobin was immunohistochemically examined in tumours from 60 patients with TCC of the bladder. Fetal haemoglobin erythrocytes and erythroblasts were mainly clonally distributed in proliferating blood vessels and not mixed with normal haemoglobin erythrocytes. The proportion of such HbF blood vessels could reach more than half of the total number of vessels. There were often many HbF erythroblasts distributed in one-cell or two-cell capillaries and present as 5-15% of cells in multi-cell vessels. This suggests a local proliferation of HbF-cell progenitors. Fetal haemoglobin cells were prominently marking lower grades of tumours, as 76% (n=21) of the patients with G1pTa were HbF+, whereas only 6.7% (n=30) of the patients with G3pT1-pT2a were HbF+. CONCLUSION Our results suggest that HbF, besides being a potential new marker for early tumour detection, might be an essential factor of early tumour development, as in fetal life. Inhibiting HbF upregulation may provide a therapeutic target for the inhibition of tumour growth.
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Affiliation(s)
- M Wolk
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Core Pathology Facility, The Royal London Hospital, 80 Newark Street, London E1 2ES, UK.
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Karalova EM, Arzumanian GA, Zakarian OS, Voskanian GE, Sarkisian KV, Karalian ZA. [Dynamics of changes in the composition of leukocyte population of peripheral blood during the African swine fever]. Vopr Virusol 2012; 57:27-31. [PMID: 23012981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The comparison of the composition of leukocytes of peripheral blood of healthy and Infected swine revealed the quantitative alterations, as well as the appearance of new cells in leukocyte population during African swine fever. It was determined that African swine fever virus induced mass-scale mortality of cells of peripheral blood, especially lymphocytes and neutrophiles. The number of the dead cells reaches 60% of the initial number of all cells at the end of infection. It was also revealed that the appearance of atypical lymphocytes and lymphoblasts was observed during viral Infections. Most of these cells are characterized by the presence of additional nucleus.
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Chen YY, Cui S, Li ZQ. [Studies on Bcl-xl, Bax and Bid expressions and erythroblasts apoptosis in chronic altitude sickness]. Zhonghua Xue Ye Xue Za Zhi 2012; 33:326-328. [PMID: 22781732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
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Mosler D, Cavrić G, Naumovski-Mihalić S, Kardum-Skelin I, Sustercić D, Jelić-Puskarić B, Prkacin I, Mestrović IP, Bradić T, Nazor A, Mosler EL. [Erythroblasts in the peripheral blood of adult patient as an adverse prognostic sign--a case report]. Acta Med Croatica 2011; 65 Suppl 1:183-187. [PMID: 23126050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Red blood cells (RBC) normally lose their nuclei before appearing in peripheral blood. After having undergone differentiation in bone marrow, blood cells must cross the blood-marrow barrier to enter the bloodstream. Erythroblasts, or nucleated red blood cells (NRBC), do not distort easily, so they cannot escape this barrier. Therefore, with the exception of the neonatal period, the presence of NRBCs in peripheral blood is always a pathologic finding. NRBCs may be found in the course of severe diseases and are associated with poor prognosis and higher mortality. The underlying pathophysiology of NRBCs in peripheral blood is not fully understood. It is hypothesized that their appearance could be provoked by either increased erythropoiesis or bone marrow micro-architectural damage mostly caused by inflammation and/or decreased tissue oxygenation. In addition, it is known that the mortality is higher in NRBC-positive patients as compared with NRBC-negative patients. Hereby we present a patient admitted to the hospital with the symptoms of cardiac failure and decompensated liver cirrhosis. The patient was already known to have liver cirrhosis of ethylic etiology, cardiac decompensation caused by hypertensive heart disease with permanent atrial fibrillation, chronic obstructive pulmonary disease, diabetes mellitus type 2, and cholelithiasis. During hospital stay, the patient developed acute pancreatitis and, soon after that, a stroke with left hemiparesis followed by cardiopulmonary arrest. Then he was transferred to the intensive care unit. Despite appropriate therapy, intensive care treatment and cardiopulmonary support, the patient's general state worsened, he developed multiple organ failure and died on day 10 of intensive care unit stay. Three days earlier, NRBCs were detected in peripheral blood and their concentration increased during the next two days before death. NRBCs are known to appear 1-3 weeks before death, but their appearance does not seem to be related to one particular cause of death. Still, detection of NRBCs is an independent risk of poor outcome, where the mortality increases with the increasing NRBC concentration. Detection of NRBCs in blood is a relatively early phenomenon prior to death, so screening for NRBCs may aid in the early identification of patients at high risk, and in making duly decision for NRBC-positive patients to obtain ongoing intensive care treatment.
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37
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Kvazireli-Kopadze MA, Pagava KI, Korinteli IA. [The congenital parcial erithroblastopenia--Diamond-Blackfan anemia]. Georgian Med News 2011:81-85. [PMID: 21617281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The article presents twenty-five year observation on 5 patients with Diamond-Blackfan anemia. In 2010 the new case of this pathology in neonate was diagnosed. Research suggests that rarely, the Diamond-Blackfan anemia may be may be the result of an aplastic anemia. To find out what the real cause of anemia is the number of reticulocytes and qualitative and quantitative indicators bone marrow should be investigated in newborns and infants.
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Funakoshi Y, Matsuoka H, Yamamoto K, Yakushijin K, Inui Y, Okamura A, Takeuchi M, Yokozaki H, Minami H. Therapy-related pure erythroid leukemia with hepatic infiltration and hemophagocytic syndrome. Intern Med 2011; 50:3031-5. [PMID: 22185999 DOI: 10.2169/internalmedicine.50.6168] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Pure erythroid leukemia (PEL) is an extremely rare disorder characterized by neoplastic proliferation of immature erythroblasts. A 66-year-old man, who had received chemoradiotherapy for hypopharyngeal cancer, was admitted because of pancytopenia. Bone marrow was infiltrated with 81% proerythroblasts positive for CD71 and CD235a. An increased number of macrophages with active hemophagocytosis was also present. Chromosome analysis showed hypodiploid complex abnormalities. The patient died of progressive disease despite induction chemotherapy. Erythroblastic infiltration into the liver and hemophagocytosis in the spleen were found at autopsy. Therapy-related PEL with hemophagocytic syndrome and hepatic infiltration of PEL has never been reported.
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Affiliation(s)
- Yohei Funakoshi
- Division of Medical Oncology/Hematology, Department of Medicine, Kobe University Graduate School of Medicine, Japan
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Affiliation(s)
- Barbara J Bain
- Department of Haematology, St Mary's Hospital Campus of Imperial College, Faculty of Medicine, St Mary's Hospital, London, United Kingdom.
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40
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Lemez P, Gáliková J, Michalová K, Dvoráková D, MacWhannell A, Zemanová Z, Stejskal J. [Patients older than 80 years with de novo acute myeloid leukemias without erythroblastic and/or megakaryocytic dysplasia achieve complete remission and longer survival after classical chemotherapy 3 + 7]. Vnitr Lek 2010; 56:37-43. [PMID: 20184110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Chemotherapy in most patients with AML over 80 years of age is not recommended because their median survival is about 1 month. The aim of our study was to identify patients in this age group who might achieve complete remission with standard dose chemotherapy. We report 9 consecutive patients with de novo AML diagnosed and treated in 1992-2008. All bone marrow samples were hypercellular, classified as FAB types M2 in 2 cases, M4 in 6, and M5 in one case. Three patients opted for supportive or palliative therapy and survived 1-4 months. Six patients received standard dose chemotherapy. Two patients with a normal karyotype had resistant AML and survived 1.0 and 2.7 months; one patient with a complex karyotype died of septic shock on the 10th day of therapy. All these three patients exhibited erythroblastic and/or megakaryocytic dysplasia (EMD) at presentation (two in more than 26% erythroblasts, all three in a half or more of megakaryocytes). Three remaining patients with AML M4, a normal karyotype but without EMD, achieved complete remission in spite of co-morbidities and a poor performance status. Two of them survived 18.6 and 28 months on maintenance therapy, the third 16.5 months without it. Very elderly AML patients without EMD appear to represent a favorable prognostic biological category (single-lineage AML) that show a good response to standard dose chemotherapy.
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Affiliation(s)
- P Lemez
- Hematologicko-transfuzní oddĕlení Nemocnice Jihlava.
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41
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Zaninoni A, Imperiali FG, Pomati M, Colombi M, Boschetti C, Barcellini W. Bone marrow mitogen-stimulated direct antiglobulin test in a case of erythroblastic synartesis. Clin Lab 2010; 56:459-462. [PMID: 21086791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this article we report a case of erythroblastic synartesis, a rare disease characterized by ineffective erythropoiesis, clusters of erythroblasts due to membrane invaginations, in which an autoimmune pathogenesis is hypothesized. We investigated the presence of anti-erythroblast autoimmunity in bone marrow cultures using a mitogen-stimulated direct antiglobulin test, a method reported to be able to disclose a latent autoimmunity in various diseases. The test revealed the presence of erythroblast-bound IgG, supporting the hypothesis of the autoimmune pathogenesis of erythroblastic synartesis. Supernatants induced the same specific morphological features, i.e erythroblastic clustering and diserythropoietic signs (multiple nuclei, nuclear inclusions, and intercellular bridges) in normal progenitors.
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Affiliation(s)
- Anna Zaninoni
- U.O. Ematologia 2, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
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Ito Y, Mitsutani S. Non-megaloblastic pernicious anemia with normoblasts possessing cytoplasmic bridge. Intern Med 2010; 49:2645-6. [PMID: 21139311 DOI: 10.2169/internalmedicine.49.4337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Yasushi Ito
- Department of Internal Medicine, Kobe Tokushukai Hospital.
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Doldan Silvero AM, Acevedo-Gadea CR, Pantanowitz L, Dezube BJ, Johari V. Images in HIV/AIDS. Unsuspected parvovirus B19 infection in a person with AIDS. AIDS Read 2009; 19:225-227. [PMID: 19642240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Adriana M Doldan Silvero
- Department of Pathology, Bayside Medical Center, Tufts University School of Medicine, Springfield, Massachusetts, USA
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44
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Nakamura K, Dan K. [Picture in clinical hematology no. 38: pure erythroid leukemia]. Rinsho Ketsueki 2009; 50:445. [PMID: 19571502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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Abstract
Erythrocyte production is regulated by balancing precursor cell apoptosis and survival signaling. Previously, we found that BH3-only proapoptotic factor, Nix, opposed erythroblast-survival signaling by erythropoietin-induced Bcl-xl during normal erythrocyte formation. Since erythropoietin treatment of human anemia has limitations, we explored the therapeutic potential of abrogating Nix-mediated erythroblast apoptosis to enhance erythrocyte production. Nix gene ablation blunted the phenylhydrazine-induced fall in blood count, enhanced hematocrit recovery, and reduced erythroblast apoptosis, despite lower endogenous erythropoietin levels. Similar to erythropoietin, Nix ablation increased early splenic erythroblasts and circulating reticulocytes, while maintaining a pool of mature erythroblasts as erythropoietic reserve. Erythrocytes in Nix-deficient mice showed morphological abnormalities, suggesting that apoptosis during erythropoiesis not only controls red blood cell number, but also serves a "triage" function, preferentially eliminating abnormal erythrocytes. These results support the concept of targeting erythroblast apoptosis to maximize erythrocyte production in acute anemia, which may be of value in erythropoietin resistance.
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Affiliation(s)
- Abhinav Diwan
- Center for Molecular Cardiovascular Research, University of Cincinnati, Cincinnati, OH, USA
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Martin FM, Prchal J, Nieva J, Saven A, Andrey J, Bethel K, Barton JC, Aripally G, Bottomley SS, Friedman JS. Purification and characterization of sideroblasts from patients with acquired and hereditary sideroblastic anaemia. Br J Haematol 2008; 143:446-50. [PMID: 18729851 DOI: 10.1111/j.1365-2141.2008.07358.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Czyz A, Dworacki G, Komarnicki M. [The role of bone marrow cells immunophenotypic study by flow cytometry in diagnosing myelodysplastic syndrome]. POSTEP HIG MED DOSW 2008; 62:354-363. [PMID: 18688206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Accepted: 06/13/2008] [Indexed: 05/26/2023] Open
Abstract
Myelodysplastic syndromes are a heterogeneous group of clonal bone marrow disorders characterized by dysplasia, progressive bone marrow failure, and increased risk of transformation to acute myeloid leukemia. Although diagnostic criteria are well established, a diagnosis based on morphologic and cytogenetic findings is often difficult in a significant number of patients. Multiparametric flow cytometric immunophenotyping is a highly sensitive and specific method for quantitative and qualitative evaluation of hematopoietic cells. Flow cytometry is used to identify dysregulated antigen expression of myeloid cells, estimate the proportion of bone marrow blasts cells, and reveal their abnormal immunophenotype. Recent data suggest that flow cytometry adds important prognostic information to the widely accepted International Prognostic Scoring System.
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Affiliation(s)
- Anna Czyz
- Katedra i Klinika Hematologii i Chorób Rozrostowych Układu Krwiotwórczego Uniwersytetu Medycznego w Poznaniu, ul. A.Szamarzewskiego 84, 60-569 Poznań.
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Abstract
Acquired sideroblastic anemia with unilineage dysplasia (WHO RARS) is a clonal stem cell disorder characterized by erythroid dysplasia, mitochondrial accumulation of mitochondrial ferritin, defective erythroid maturation and anemia. A fraction of these patients also show elevated platelet counts; since 2001 this has been defined as RARS with marked thrombocytosis (RARS-T). It has recently been described that around half of RARS-T patients, along with a small subset of other MDS and mixed myelodysplastic/ myeloproliferative disorders, carry the JAK2 mutation, and that MPL mutations are found in single patients. Clinically, RARS-T patients show features of both RARS, essential thrombocythmia (ET) and to some extent also myelofibrosis. However, the degree of anemia and overall survival is more similar to RARS than myeloproliferative disorders. The occurrence of JAK2 mutations and features of ET in RARS is too frequent to be the result of chance only, and it is possible that this link may provide a key to an increased understanding of the genetic abnormalities causing ring sideroblast formation.
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Affiliation(s)
- Eva Hellström-Lindberg
- Department of Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden.
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Krajewski P, Welfel E, Kalinka J, Pokrzywnicka M, Kwiatkowska M. [Evaluation of the relationship between circulating nucleated red blood cells count and inborn infection in neonates]. Ginekol Pol 2008; 79:17-22. [PMID: 18510045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
OBJECTIVES to determine the relationship between the initial nucleated red blood cells (nRBC) count during the first 12 hours after birth and inborn infection in neonates. MATERIALS AND METHODS The retrospective study comprised of 306 neonates born in the Department of Perinatology of the I Chair of Gynaecology and Obstetrics in Łódź, Poland, in the years 2002-2007, among whom the nucleated red blood cells count were calculated within the first 12 hours after birth. Two categories of nRBC count: the normal and the elevated value, were statistically elaborated by a Mann-Whitney test and a chi-square test with two clinical outcome categories: the presence and the absence of inborn infection in the analyzed neonates. Statistical significance was indicated by p value lower than 0,05. RESULTS Among 306 newborns, there were 127 mature neonates (41.5%) and 179 prematures (58.5%). The mean of the initial nRBC count in the analyzed newborn population was 40, 15. The mean of the nRBC count in the infected neonates was three times higher (52.56) than the mean of the nRBC count in newborns without inborn infection (16.76) - (p=0.00001). Inborn neonatal infection concerned a vast majority of cases with an elevated value of the nRBC count (86.4%), but in 13.6%, inborn infection was not observed. Among the cases with a normal nRBC count, the presence and the absence of inborn infection was diagnosed in about 50% of the analyzed babies (50.83% vs 49.17%). The elevated value of the nRBC count in infected neonates concerned mainly premature babies, rather than mature neonates, and similarly in neonates with a lower Apgar score than in babies born in good condition. CONCLUSIONS 1. The positive association between elevated initial nucleated red blood cells count after birth and inborn infection in newborns has been revealed. 2. An elevated nucleated red blood cells count may be an auxiliary, early indicator for inborn infection in neonates. 3. Prematurity and perinatal asphyxia favour the elevation of a nucleated red blood cells count in cases with inborn infection.
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Affiliation(s)
- Paweł Krajewski
- Klinika Perinatologii I Katedry Ginekologii i Połoznictwa Uniwersytetu Medycznego w Łodzi
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Morales-Ramírez P, Vallarino-Kelly T, Cruz-Vallejo VL. Mechanisms of DNA breaks inductionin vivo by 5-azacytidine: paths of micronucleus induction by azaC. J Appl Toxicol 2008; 28:254-9. [PMID: 17685412 DOI: 10.1002/jat.1274] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The aim of the present study was to correlate the time-response curves of micronucleated polychromatic erythrocyte (MN-PCE) induction by 5-azacytidine (azaC) with the possible processes involved in DNA break production; this is based on the results previously published by other authors. The MN-PCE induction at two different doses of azaC was determined by sampling blood from the tails of mice before the acute treatment and over nine periods of 8 h each afterwards. Both doses caused two peaks of MN-PCE induction, one at 32 h and another at 48 h, approximately; a shoulder was detected that remained high from 56 h up to the end of the study (72 h). These results suggest that azaC induced DNA breaks and subsequently MN (micronucleus) by three different mechanisms, and in agreement with data in the literature, these could be successively the following: (i) during excision of the large adduct comprising the DNA methyl transferase covalently linked to DNA; (ii) failure of recombination repair or mismatch repair; and (iii) persistent chromosome fragility in G-C rich sites due to DNA demethylation and chromatin decondensation.
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Affiliation(s)
- P Morales-Ramírez
- Instituto Nacional de Investigaciones Nucleares, AP 18-1027 México, D.F., México.
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