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Joshi U, Jani D, George LB, Highland H. Human erythrocytes' perplexing behaviour: erythrocytic microRNAs. Mol Cell Biochem 2024:10.1007/s11010-024-05075-0. [PMID: 39037663 DOI: 10.1007/s11010-024-05075-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Accepted: 07/14/2024] [Indexed: 07/23/2024]
Abstract
Erythrocytes have the potential role in erythropoiesis and disease diagnosis. Thought to have lacked nucleic acid content, mammalian erythrocytes are nevertheless able to function for 120-140 days, metabolize heme, maintain oxidative stress, and so on. Mysteriously, erythrocytes proved as largest repositories of microRNAs (miRNAs) some of which are selectively retained and function in mature erythrocytes. They have unique expression patterns and have been found to be linked to specific conditions such as sickle cell anaemia, high-altitude hypoxia, chronic mountain sickness, cardiovascular and metabolic conditions as well as host-parasite interactions. They also have been implicated in cell storage-related damage and the regulation of its survival. However, the mechanism by which miRNAs function in the cell remains unclear. Investigations into the molecular mechanism of miRNAs in erythrocytes via extracellular vesicles have provided important clues in research studies on Plasmodium infection. Erythrocytes are also the primary source of circulating miRNAs but, how they affect the plasma/serum miRNAs profiles are still poorly understood. Erythrocyte-derived exosomal miRNAs, can interact with various body cell types, and have easy access to all regions, making them potentially crucial in various pathophysiological conditions. Which can also improve our understanding to identify potential treatment options and discovery related to non-invasive diagnostic markers. This article emphasizes the importance of erythrocytic miRNAs while focusing on the enigmatic behaviour of erythrocytes. It also sheds light on how this knowledge may be applied in the future to enhance the state of erythrocyte translational research from the standpoint of erythrocytic miRNAs.
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Affiliation(s)
- Urja Joshi
- Department of Biochemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India.
| | - Dhara Jani
- Department of Zoology, Biomedical Technology, Human Genetics and WLC, School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Linz-Buoy George
- Department of Zoology, Biomedical Technology, Human Genetics and WLC, School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Hyacinth Highland
- Department of Zoology, Biomedical Technology, Human Genetics and WLC, School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
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Liu G, Kim J, Nguyen N, Zhou L, Dean A. Long noncoding RNA GATA2AS influences human erythropoiesis by transcription factor and chromatin landscape modulation. Blood 2024; 143:2300-2313. [PMID: 38447046 PMCID: PMC11181357 DOI: 10.1182/blood.2023021287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 02/29/2024] [Accepted: 03/03/2024] [Indexed: 03/08/2024] Open
Abstract
ABSTRACT Long noncoding RNAs (lncRNAs) are extensively expressed in eukaryotic cells and have been revealed to be important for regulating cell differentiation. Many lncRNAs have been found to regulate erythroid differentiation in the mouse. However, given the low sequence conservation of lncRNAs between mouse and human, our understanding of lncRNAs in human erythroid differentiation remains incomplete. lncRNAs are often transcribed opposite to protein coding genes and regulate their expression. Here, we characterized a human erythrocyte-expressed lncRNA, GATA2AS, which is transcribed opposite to erythroid transcription regulator GATA2. GATA2AS is a 2080-bp long, primarily nucleus-localized noncoding RNA that is expressed in erythroid progenitor cells and decreases during differentiation. Knockout of GATA2AS in human HUDEP2 erythroid progenitor cells using CRISPR-Cas9 genome editing to remove the transcription start site accelerated erythroid differentiation and dysregulated erythroblast gene expression. We identified GATA2AS as a novel GATA2 and HBG activator. Chromatin isolation by RNA purification showed that GATA2AS binds to thousands of genomic sites and colocalizes at a subset of sites with erythroid transcription factors including LRF and KLF1. RNA pulldown and RNA immunoprecipitation confirmed interaction between GATA2AS and LRF and KLF1. Chromatin immunoprecipitation sequencing (ChIP-seq) showed that knockout of GATA2AS reduces binding of these transcription factors genome wide. Assay for transposase-accessible chromatin sequencing (ATAC-seq) and H3K27ac ChIP-seq showed that GATA2AS is essential to maintain the chromatin regulatory landscape during erythroid differentiation. Knockdown of GATA2AS in human primary CD34+ cells mimicked results in HUDEP2 cells. Overall, our results implicate human-specific lncRNA GATA2AS as a regulator of erythroid differentiation by influencing erythroid transcription factor binding and the chromatin regulatory landscape.
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Affiliation(s)
- Guoyou Liu
- Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Juhyun Kim
- Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Nicole Nguyen
- Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Lecong Zhou
- Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
| | - Ann Dean
- Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD
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Ye L, Wang C, Li A, Li M, Pi Y, Yang J, Zhu Z, Lu D. Targeted next-generation sequencing and long-read HiFi sequencing provide novel insights into clinically significant KLF1 variants. BMC Genomics 2024; 25:230. [PMID: 38429690 PMCID: PMC10908068 DOI: 10.1186/s12864-024-10148-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 02/20/2024] [Indexed: 03/03/2024] Open
Abstract
BACKGROUND Krüppel-like factor 1 (KLF1), a crucial erythroid transcription factor, plays a significant role in various erythroid changes and haemolytic diseases. The rare erythrocyte Lutheran inhibitor (In(Lu)) blood group phenotype serves as an effective model for identifying KLF1 hypomorphic and loss-of-function variants. In this study, we aimed to analyse the genetic background of the In(Lu) phenotype in a population-based sample group by high-throughput technologies to find potentially clinically significant KLF1 variants. RESULTS We included 62 samples with In(Lu) phenotype, screened from over 300,000 Chinese blood donors. Among them, 36 samples were sequenced using targeted Next Generation Sequencing (NGS), whereas 19 samples were sequenced using High Fidelity (HiFi) technology. In addition, seven samples were simply sequenced using Sanger sequencing. A total of 29 hypomorphic or loss-of-function variants of KLF1 were identified, 21 of which were newly discovered. All new variants discovered by targeted NGS or HiFi sequencing were validated through Sanger sequencing, and the obtained results were found to be consistent. The KLF1 haplotypes of all new variants were further confirmed using clone sequencing or HiFi sequencing. The lack of functional KLF1 variants detected in the four samples indicates the presence of additional regulatory mechanisms. In addition, some samples exhibited BCAM polymorphisms, which encodes antigens of the Lutheran (LU) blood group system. However, no BCAM mutations which leads to the absence of LU proteins were detected. CONCLUSIONS High-throughput sequencing methods, particularly HiFi sequencing, were introduced for the first time into genetic analysis of the In(Lu) phenotype. Targeted NGS and HiFi sequencing demonstrated the accuracy of the results, providing additional advantages such as simultaneous analysis of other blood group genes and clarification of haplotypes. Using the In(Lu) phenotype, a powerful model for identifying hypomorphic or loss-of-function KLF1 variants, numerous novel variants have been detected, which have contributed to the comprehensive understanding of KLF1. These clinically significant KLF1 mutations can serve as a valuable reference for the diagnosis of related blood cell diseases.
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Affiliation(s)
- Luyi Ye
- State Key Laboratory of Genetic Engineering and MOE Engineering Research Center of Gene Technology, School of Life Sciences, Fudan University, 200433, Shanghai, China
- Shanghai Institute of Blood Transfusion, Shanghai Blood Center, 20051, Shanghai, China
| | - Chen Wang
- Shanghai Institute of Blood Transfusion, Shanghai Blood Center, 20051, Shanghai, China
| | - Aijing Li
- Shanghai Institute of Blood Transfusion, Shanghai Blood Center, 20051, Shanghai, China
| | - Minghao Li
- Shanghai Institute of Blood Transfusion, Shanghai Blood Center, 20051, Shanghai, China
| | - Yan Pi
- State Key Laboratory of Genetic Engineering and MOE Engineering Research Center of Gene Technology, School of Life Sciences, Fudan University, 200433, Shanghai, China
- NHC Key Laboratory of Birth Defects and Reproductive Health (Chongqing Key Laboratory of Birth Defects and Reproductive Health, Chongqing Population and Family Planning Science and Technology Research Institute), 400020, Chongqing, China
| | - Jingmin Yang
- State Key Laboratory of Genetic Engineering and MOE Engineering Research Center of Gene Technology, School of Life Sciences, Fudan University, 200433, Shanghai, China
- Shanghai WeHealth Biomedical Technology Co., Ltd, 201318, Shanghai, China
| | - Ziyan Zhu
- Shanghai Institute of Blood Transfusion, Shanghai Blood Center, 20051, Shanghai, China
| | - Daru Lu
- State Key Laboratory of Genetic Engineering and MOE Engineering Research Center of Gene Technology, School of Life Sciences, Fudan University, 200433, Shanghai, China.
- NHC Key Laboratory of Birth Defects and Reproductive Health (Chongqing Key Laboratory of Birth Defects and Reproductive Health, Chongqing Population and Family Planning Science and Technology Research Institute), 400020, Chongqing, China.
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Bieker JJ, Philipsen S. Erythroid Krüppel-Like Factor (KLF1): A Surprisingly Versatile Regulator of Erythroid Differentiation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1459:217-242. [PMID: 39017846 DOI: 10.1007/978-3-031-62731-6_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
Erythroid Krüppel-like factor (KLF1), first discovered in 1992, is an erythroid-restricted transcription factor (TF) that is essential for terminal differentiation of erythroid progenitors. At face value, KLF1 is a rather inconspicuous member of the 26-strong SP/KLF TF family. However, 30 years of research have revealed that KLF1 is a jack of all trades in the molecular control of erythropoiesis. Initially described as a one-trick pony required for high-level transcription of the adult HBB gene, we now know that it orchestrates the entire erythroid differentiation program. It does so not only as an activator but also as a repressor. In addition, KLF1 was the first TF shown to be directly involved in enhancer/promoter loop formation. KLF1 variants underlie a wide range of erythroid phenotypes in the human population, varying from very mild conditions such as hereditary persistence of fetal hemoglobin and the In(Lu) blood type in the case of haploinsufficiency, to much more serious non-spherocytic hemolytic anemias in the case of compound heterozygosity, to dominant congenital dyserythropoietic anemia type IV invariably caused by a de novo variant in a highly conserved amino acid in the KLF1 DNA-binding domain. In this chapter, we present an overview of the past and present of KLF1 research and discuss the significance of human KLF1 variants.
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Affiliation(s)
- James J Bieker
- Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Sjaak Philipsen
- Department of Cell Biology, Erasmus MC, Rotterdam, The Netherlands.
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5
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Tang P, Wang H. Regulation of erythropoiesis: emerging concepts and therapeutic implications. Hematology 2023; 28:2250645. [PMID: 37639548 DOI: 10.1080/16078454.2023.2250645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 08/17/2023] [Indexed: 08/31/2023] Open
Abstract
The process of erythropoiesis is complex and involves the transfer of cells from the yolk sac to the fetal hepar and, ultimately, to the bone marrow during embryonic development. Within the bone marrow, erythroid progenitor cells undergo several stages to generate reticulocytes that enter the bloodstream. Erythropoiesis is regulated by various factors, with erythropoietin (EPO) synthesized by the kidney being the promoting factor and hepcidin synthesized by the hepar inhibiting iron mobilization. Transcription factors, such as GATA and KLF, also play a crucial role in erythropoiesis. Disruption of any of these factors can lead to abnormal erythropoiesis, resulting in red cell excess, red cell deficiency, or abnormal morphological function. This review provides a general description of erythropoiesis, as well as its regulation, highlighting the significance of understanding the process for the diagnosis and treatment of various hematological disorders.
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Affiliation(s)
- Pu Tang
- Department of Hematology, General Hospital, Tianjin Medical University, Tianjin, People's Republic of China
| | - Huaquan Wang
- Department of Hematology, General Hospital, Tianjin Medical University, Tianjin, People's Republic of China
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Chen X, Pillay S, Lohmann F, Bieker JJ. Association of DDX5/p68 protein with the upstream erythroid enhancer element (EHS1) of the gene encoding the KLF1 transcription factor. J Biol Chem 2023; 299:105489. [PMID: 38000658 PMCID: PMC10750184 DOI: 10.1016/j.jbc.2023.105489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 10/28/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023] Open
Abstract
EKLF/KLF1 is an essential transcription factor that plays a global role in erythroid transcriptional activation. Regulation of KLF1 is of interest, as it displays a highly restricted expression pattern, limited to erythroid cells and its progenitors. Here we use biochemical affinity purification to identify the DDX5/p68 protein as an activator of KLF1 by virtue of its interaction with the erythroid-specific DNAse hypersensitive site upstream enhancer element (EHS1). We further show that this protein associates with DEK and CTCF. We postulate that the range of interactions of DDX5/p68 with these and other proteins known to interact with this element render it part of the enhanseosome complex critical for optimal expression of KLF1 and enables the formation of a proper chromatin configuration at the Klf1 locus. These individual interactions provide quantitative contributions that, in sum, establish the high-level activity of the Klf1 promoter and suggest they can be selectively manipulated for clinical benefit.
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Affiliation(s)
- Xiaoyong Chen
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, New York, New York, USA
| | - Sanjana Pillay
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, New York, New York, USA
| | - Felix Lohmann
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, New York, New York, USA
| | - James J Bieker
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, New York, New York, USA; Black Familly Stem Cell Institute, Mount Sinai School of Medicine, New York, New York, USA; Tisch Cancer Institute, Mount Sinai School of Medicine, New York, New York, USA; Mindich Child Health and Development Institute, Mount Sinai School of Medicine, New York, New York, USA.
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7
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Li D, Zhao XY, Zhou S, Hu Q, Wu F, Lee HY. Multidimensional profiling reveals GATA1-modulated stage-specific chromatin states and functional associations during human erythropoiesis. Nucleic Acids Res 2023; 51:6634-6653. [PMID: 37254808 PMCID: PMC10359633 DOI: 10.1093/nar/gkad468] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 04/18/2023] [Accepted: 05/13/2023] [Indexed: 06/01/2023] Open
Abstract
Mammalian erythroid development can be divided into three stages: hematopoietic stem and progenitor cell (HSPC), erythroid progenitor (Ery-Pro), and erythroid precursor (Ery-Pre). However, the mechanisms by which the 3D genome changes to establish the stage-specific transcription programs that are critical for erythropoiesis remain unclear. Here, we analyze the chromatin landscape at multiple levels in defined populations from primary human erythroid culture. While compartments and topologically associating domains remain largely unchanged, ∼50% of H3K27Ac-marked enhancers are dynamic in HSPC versus Ery-Pre. The enhancer anchors of enhancer-promoter loops are enriched for occupancy of respective stage-specific transcription factors (TFs), indicating these TFs orchestrate the enhancer connectome rewiring. The master TF of erythropoiesis, GATA1, is found to occupy most erythroid gene promoters at the Ery-Pro stage, and mediate conspicuous local rewiring through acquiring binding at the distal regions in Ery-Pre, promoting productive erythroid transcription output. Knocking out GATA1 binding sites precisely abrogates local rewiring and corresponding gene expression. Interestingly, knocking down GATA1 can transiently revert the cell state to an earlier stage and prolong the window of progenitor state. This study reveals mechanistic insights underlying chromatin rearrangements during development by integrating multidimensional chromatin landscape analyses to associate with transcription output and cellular states.
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Affiliation(s)
- Dong Li
- Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Xin-Ying Zhao
- Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Shuo Zhou
- Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Qi Hu
- Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Fan Wu
- Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Hsiang-Ying Lee
- Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Peking University, Beijing 100871, China
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing 100871, China
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Pegka F, Ben-Califa N, Neumann D, Jäkel H, Hengst L. EpoR Activation Stimulates Erythroid Precursor Proliferation by Inducing Phosphorylation of Tyrosine-88 of the CDK-Inhibitor p27 Kip1. Cells 2023; 12:1704. [PMID: 37443738 PMCID: PMC10340229 DOI: 10.3390/cells12131704] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/07/2023] [Accepted: 06/20/2023] [Indexed: 07/15/2023] Open
Abstract
Erythrocyte biogenesis needs to be tightly regulated to secure oxygen transport and control plasma viscosity. The cytokine erythropoietin (Epo) governs erythropoiesis by promoting cell proliferation, differentiation, and survival of erythroid precursor cells. Erythroid differentiation is associated with an accumulation of the cyclin-dependent kinase inhibitor p27Kip1, but the regulation and role of p27 during erythroid proliferation remain largely unknown. We observed that p27 can bind to the erythropoietin receptor (EpoR). Activation of EpoR leads to immediate Jak2-dependent p27 phosphorylation of tyrosine residue 88 (Y88). This modification is known to impair its CDK-inhibitory activity and convert the inhibitor into an activator and assembly factor of CDK4,6. To investigate the physiological role of p27-Y88 phosphorylation in erythropoiesis, we analyzed p27Y88F/Y88F knock-in mice, where tyrosine-88 was mutated to phenylalanine. We observed lower red blood cell counts, lower hematocrit levels, and a reduced capacity for colony outgrowth of CFU-Es (colony-forming unit-erythroid), indicating impaired cell proliferation of early erythroid progenitors. Compensatory mechanisms of reduced p27 and increased Epo expression protect from stronger dysregulation of erythropoiesis. These observations suggest that p27-Y88 phosphorylation by EpoR pathway activation plays an important role in the stimulation of erythroid progenitor proliferation during the early stages of erythropoiesis.
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Affiliation(s)
- Fragka Pegka
- Institute of Medical Biochemistry, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Nathalie Ben-Califa
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel (D.N.)
| | - Drorit Neumann
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel (D.N.)
| | - Heidelinde Jäkel
- Institute of Medical Biochemistry, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria
| | - Ludger Hengst
- Institute of Medical Biochemistry, Biocenter, Medical University of Innsbruck, 6020 Innsbruck, Austria
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9
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Ferrer-Vicens I, Ferguson DCJ, Wilson MC, Heesom KJ, Bieker JJ, Frayne J. A novel human cellular model of CDA IV enables comprehensive analysis revealing the molecular basis of the disease phenotype. Blood 2023; 141:3039-3054. [PMID: 37084386 PMCID: PMC10315626 DOI: 10.1182/blood.2022018735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 02/16/2023] [Accepted: 02/17/2023] [Indexed: 04/23/2023] Open
Abstract
Red blood cell disorders can result in severe anemia. One such disease congenital dyserythropoietic anemia IV (CDA IV) is caused by the heterozygous mutation E325K in the transcription factor KLF1. However, studying the molecular basis of CDA IV is severely impeded by the paucity of suitable and adequate quantities of material from patients with anemia and the rarity of the disease. We, therefore, took a novel approach, creating a human cellular disease model system for CDA IV that accurately recapitulates the disease phenotype. Next, using comparative proteomics, we reveal extensive distortion of the proteome and a wide range of disordered biological processes in CDA IV erythroid cells. These include downregulated pathways the governing cell cycle, chromatin separation, DNA repair, cytokinesis, membrane trafficking, and global transcription, and upregulated networks governing mitochondrial biogenesis. The diversity of such pathways elucidates the spectrum of phenotypic abnormalities that occur with CDA IV and impairment to erythroid cell development and survival, collectively explaining the CDA IV disease phenotype. The data also reveal far more extensive involvement of KLF1 in previously assigned biological processes, along with novel roles in the regulation of intracellular processes not previously attributed to this transcription factor. Overall, the data demonstrate the power of such a model cellular system to unravel the molecular basis of disease and how studying the effects of a rare mutation can reveal fundamental biology.
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Affiliation(s)
| | | | - Marieangela C. Wilson
- Proteomics Facility, Faculty of Life Sciences, University of Bristol, Bristol, United Kingdom
| | - Kate J. Heesom
- Proteomics Facility, Faculty of Life Sciences, University of Bristol, Bristol, United Kingdom
| | - James J. Bieker
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, New York, NY
| | - Jan Frayne
- School of Biochemistry, University of Bristol, Bristol, United Kingdom
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10
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Li Y, Liang ZY, Wang HL. N6-methyl-2'-deoxyadenosine promotes self-renewal of BFU-E progenitor in erythropoiesis. iScience 2023; 26:106924. [PMID: 37283807 PMCID: PMC10239700 DOI: 10.1016/j.isci.2023.106924] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/08/2023] [Accepted: 05/15/2023] [Indexed: 06/08/2023] Open
Abstract
Red blood cells supply the oxygen required for all human cells and are in demand for emerging blood-loss therapy. Here we identified N6-methyl-2'-deoxyadenosine (6mdA) as an agonist that promotes the hyperproliferation of burst-forming unit erythroid (BFU-E) progenitor cells. In addition, 6mdA represses the apoptosis of erythroid progenitor cells (EPCs). Combined use of with SCF and EPO enabled cultures of isolated BFU-E to be expanded up to 5,000-fold. Transcriptome analysis showed that 6mdA upregulates the expression of the EPC-associated factors c-Kit, Myb, and Gata2 and downregulates that of the erythroid maturation-related transcription factors Gata1, Spi1, and Klf1. Mechanistic studies suggested that 6mdA enhances and prolongs the activation of erythropoiesis-associated master gene c-Kit and its downstream signaling, leading to expansion and accumulation of EPCs. Collectively, we demonstrate that 6mdA can efficiently stimulate the EPC hyperproliferation and provide a new regenerative medicine recipe to improve ex vivo generation of red blood cells.
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Affiliation(s)
- Yao Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zi-Yu Liang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hai-Lin Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Institute of Environment and Health, Jianghan University, Wuhan, Hubei 430056, China
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11
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Gnanapragasam MN, Planutis A, Glassberg JA, Bieker JJ. Identification of a genomic DNA sequence that quantitatively modulates KLF1 transcription factor expression in differentiating human hematopoietic cells. Sci Rep 2023; 13:7589. [PMID: 37165057 PMCID: PMC10172341 DOI: 10.1038/s41598-023-34805-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 05/08/2023] [Indexed: 05/12/2023] Open
Abstract
The onset of erythropoiesis is under strict developmental control, with direct and indirect inputs influencing its derivation from the hematopoietic stem cell. A major regulator of this transition is KLF1/EKLF, a zinc finger transcription factor that plays a global role in all aspects of erythropoiesis. Here, we have identified a short, conserved enhancer element in KLF1 intron 1 that is important for establishing optimal levels of KLF1 in mouse and human cells. Chromatin accessibility of this site exhibits cell-type specificity and is under developmental control during the differentiation of human CD34+ cells towards the erythroid lineage. This site binds GATA1, SMAD1, TAL1, and ETV6. In vivo editing of this region in cell lines and primary cells reduces KLF1 expression quantitatively. However, we find that, similar to observations seen in pedigrees of families with KLF1 mutations, downstream effects are variable, suggesting that the global architecture of the site is buffered towards keeping the KLF1 genetic region in an active state. We propose that modification of intron 1 in both alleles is not equivalent to complete loss of function of one allele.
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Affiliation(s)
- M N Gnanapragasam
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, One Gustave L. Levy Place, Box 1020, New York, NY, 10029, USA
- Department of Biological, Geological, and Environmental Sciences, Center for Gene Regulation in Health and Disease, Cleveland State University, Cleveland, OH, USA
| | - A Planutis
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, One Gustave L. Levy Place, Box 1020, New York, NY, 10029, USA
| | - J A Glassberg
- Department of Emergency Medicine, Hematology and Medical Oncology, Mount Sinai School of Medicine, New York, NY, USA
| | - J J Bieker
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, One Gustave L. Levy Place, Box 1020, New York, NY, 10029, USA.
- Black Family Stem Cell Institute, Mount Sinai School of Medicine, New York, USA.
- Tisch Cancer Institute, Mount Sinai School of Medicine, New York, USA.
- Mindich Child Health and Development Institute, Mount Sinai School of Medicine, New York, NY, USA.
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12
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EKLF/Klf1 regulates erythroid transcription by its pioneering activity and selective control of RNA Pol II pause-release. Cell Rep 2022; 41:111830. [PMID: 36543143 PMCID: PMC9879271 DOI: 10.1016/j.celrep.2022.111830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 10/06/2022] [Accepted: 11/22/2022] [Indexed: 12/24/2022] Open
Abstract
EKLF/Klf1 is a zinc-finger transcription activator essential for erythroid lineage commitment and terminal differentiation. Using ChIP-seq, we investigate EKLF DNA binding and transcription activation mechanisms during mouse embryonic erythropoiesis. We utilize the Nan/+ mouse that expresses the EKLF-E339D (Nan) variant mutated in its conserved zinc-finger region and address the mechanism of hypomorphic and neomorphic changes in downstream gene expression. First, we show that Nan-EKLF limits normal EKLF binding to a subset of its sites. Second, we find that ectopic binding of Nan-EKLF occurs largely at enhancers and activates transcription through pioneering activity. Third, we find that for a subset of ectopic targets, gene activation is achieved in Nan/+ only by Nan-EKLF binding to distal enhancers, leading to RNA polymerase II pause-release. These results have general applicability to understanding how a DNA binding variant factor confers dominant disruptive effects on downstream gene expression even in the presence of its normal counterpart.
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13
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Bai M, Cao P, Lin Y, Yu P, Song S, Chen L, Wang L, Chen Y. Intermittent Caloric Restriction Promotes Erythroid Development and Ameliorates Phenylhydrazine-Induced Anemia in Mice. Front Nutr 2022; 9:892435. [PMID: 35757249 PMCID: PMC9218721 DOI: 10.3389/fnut.2022.892435] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 05/11/2022] [Indexed: 12/17/2022] Open
Abstract
Background Dietary restriction has a profound effect in altering immune system and promoting metabolic health and aging. However, how dietary restriction impacts erythroid system is largely unknown. We found that a short-term caloric restriction (CR) stimulates expression of KLF1, a master regulator of erythroid development, in the spleen of mouse, and thus explored the potential effect of CR on erythropoiesis. Methods We analyzed the effects of intermittent CR and continuous CR for different lengths of time on parameters of peripheral blood and erythroid profiles in the spleen and bone marrow in C57BL/6 mice. We next assessed how different types of CR affect phenylhydrazine-induced anemia in the mice. Colony formation assay was also used to analyze LK + progenitors and BFU-E in the bone marrow. Results Intermittent CR for 2 weeks raised the number of reticulocytes in the blood, while continuous CR for 2 weeks elevated red blood cells and hemoglobin level. Intermittent CR for 2 weeks promoted extramedullary hematopoiesis in the spleen, while continuous CR mainly promoted erythropoiesis in the bone marrow. Interestingly, a short-term intermittent CR but not continuous CR was able to ameliorate phenylhydrazine-induced anemia. Intermittent CR reduced early-stage erythroblasts and increased late-stage erythroblasts/mature RBCs in the spleen, indicating an accelerated transition from early-stage to late-stage erythroblasts/mature red blood cells. Furthermore, a short-term intermittent CR elevated LK + progenitors and the committed erythroid progenitor cells BFU-E in the bone marrow. Conclusion Our study demonstrated that a short-term intermittent CR, but not continuous CR, has a significant effect to promote hematopoiesis and such activity can ameliorate phenylhydrazine-induced acute anemia in the mouse.
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Affiliation(s)
- Meijuan Bai
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Peijuan Cao
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yijun Lin
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Pengcheng Yu
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Shuo Song
- School of Life Sciences and Technology, ShanghaiTech University, Shanghai, China
| | - Lingling Chen
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Lan Wang
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yan Chen
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China.,School of Life Sciences and Technology, ShanghaiTech University, Shanghai, China
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14
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Soboleva S, Miharada K. Induction of enucleation in primary and immortalized erythroid cells. Int J Hematol 2022; 116:192-198. [PMID: 35610497 DOI: 10.1007/s12185-022-03386-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/02/2022] [Accepted: 05/06/2022] [Indexed: 10/18/2022]
Abstract
Enucleation is a crucial event during the erythropoiesis, implicating drastic morphologic and transcriptomic/proteomic changes. While many genes deletion lead to failed or impaired enucleation have been identified, directly triggering the erythroid maturation, particularly enucleation, is still challenging. Inducing enucleation at the desired timing is necessary to develop efficient methods to generate mature, fully functional red blood cells in vitro for future transfusion therapies. However, there are considerable differences between primary erythroid cells and cultured cell sources, particularly pluripotent stem cell-derived erythroid cells and immortalized erythroid cell lines. For instance, the difference in the proliferative status between those cell types could be a critical factor, as cell cycle exit is closely connected to the terminal maturation of primary. In this review, we will discuss previous findings on the enucleation machinery and current challengings to trigger the enucleation of infinite erythroid cell sources.
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Affiliation(s)
- Svetlana Soboleva
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, Lund, Sweden
| | - Kenichi Miharada
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, Lund, Sweden. .,International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan.
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15
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Yang S, Sun G, Wu P, Chen C, Kuang Y, Liu L, Zheng Z, He Y, Gu Q, Lu T, Zhu C, Wang F, Gou F, Yang Z, Zhao X, Yuan S, Yang L, Lu S, Li Y, Lv X, Dong F, Ma Y, Yu J, Ng LG, Shi L, Liu J, Shi L, Cheng T, Cheng H. WDR82-binding long noncoding RNA lncEry controls mouse erythroid differentiation and maturation. J Exp Med 2022; 219:213079. [PMID: 35315911 PMCID: PMC8943841 DOI: 10.1084/jem.20211688] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 01/18/2022] [Accepted: 02/16/2022] [Indexed: 12/13/2022] Open
Abstract
Hematopoietic differentiation is controlled by both genetic and epigenetic regulators. Long noncoding RNAs (lncRNAs) have been demonstrated to be important for normal hematopoiesis, but their function in erythropoiesis needs to be further explored. We profiled the transcriptomes of 16 murine hematopoietic cell populations by deep RNA sequencing and identified a novel lncRNA, Gm15915, that was highly expressed in erythroid-related progenitors and erythrocytes. For this reason, we named it lncEry. We also identified a novel lncEry isoform, which was the principal transcript that has not been reported before. lncEry depletion impaired erythropoiesis, indicating the important role of the lncRNA in regulating erythroid differentiation and maturation. Mechanistically, we found that lncEry interacted with WD repeat–containing protein 82 (WDR82) to promote the transcription of Klf1 and globin genes and thus control the early and late stages of erythropoiesis, respectively. These findings identified lncEry as an important player in the transcriptional regulation of erythropoiesis.
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Affiliation(s)
- Shangda Yang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Guohuan Sun
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Peng Wu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Cong Chen
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Yijin Kuang
- Molecular Biology Research Center, Center for Medical Genetics, Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, China
| | - Ling Liu
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Zhaofeng Zheng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Yicheng He
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Quan Gu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Ting Lu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Caiying Zhu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Fengjiao Wang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Fanglin Gou
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Zining Yang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Xiangnan Zhao
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Shiru Yuan
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Liu Yang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Shihong Lu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Yapu Li
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Xue Lv
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Fang Dong
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Yanni Ma
- State Key Laboratory of Medical Molecular Biology, Key Laboratory of RNA Regulation and Hematopoiesis, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Jia Yu
- State Key Laboratory of Medical Molecular Biology, Key Laboratory of RNA Regulation and Hematopoiesis, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Lai Guan Ng
- Singapore Immunology Network, Agency for Science, Technology and Research, Biopolis, Singapore
| | - Lihong Shi
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Jing Liu
- Molecular Biology Research Center, Center for Medical Genetics, Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, China
| | - Lei Shi
- The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Tao Cheng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
| | - Hui Cheng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.,Center for Stem Cell Medicine, Department of Stem Cell and Regenerative Medicine, Chinese Academy of Medical Sciences, Tianjin, China
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16
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Wells M, Steiner L. Epigenetic and Transcriptional Control of Erythropoiesis. Front Genet 2022; 13:805265. [PMID: 35330735 PMCID: PMC8940284 DOI: 10.3389/fgene.2022.805265] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 02/16/2022] [Indexed: 12/21/2022] Open
Abstract
Erythropoiesis is a process of enormous magnitude, with the average person generating two to three million red cells every second. Erythroid progenitors start as large cells with large nuclei, and over the course of three to four cell divisions they undergo a dramatic decrease in cell size accompanied by profound nuclear condensation, which culminates in enucleation. As maturing erythroblasts are undergoing these dramatic phenotypic changes, they accumulate hemoglobin and express high levels of other erythroid-specific genes, while silencing much of the non-erythroid transcriptome. These phenotypic and gene expression changes are associated with distinct changes in the chromatin landscape, and require close coordination between transcription factors and epigenetic regulators, as well as precise regulation of RNA polymerase II activity. Disruption of these processes are associated with inherited anemias and myelodysplastic syndromes. Here, we review the epigenetic mechanisms that govern terminal erythroid maturation, and their role in human disease.
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Affiliation(s)
- Maeve Wells
- Department of Pediatrics, University of Rochester, Rochester, NY, United States
| | - Laurie Steiner
- Department of Pediatrics, University of Rochester, Rochester, NY, United States
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17
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Ghosh S, Raundhal M, Myers SA, Carr SA, Chen X, Petsko GA, Glimcher LH. Identification of RIOK2 as a master regulator of human blood cell development. Nat Immunol 2022; 23:109-121. [PMID: 34937919 DOI: 10.1038/s41590-021-01079-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Accepted: 10/25/2021] [Indexed: 11/09/2022]
Abstract
Anemia is a major comorbidity in aging, chronic kidney and inflammatory diseases, and hematologic malignancies. However, the transcriptomic networks governing hematopoietic differentiation in blood cell development remain incompletely defined. Here we report that the atypical kinase RIOK2 (right open reading frame kinase 2) is a master transcription factor (TF) that not only drives erythroid differentiation, but also simultaneously suppresses megakaryopoiesis and myelopoiesis in primary human stem and progenitor cells. Our study reveals the previously uncharacterized winged helix-turn-helix DNA-binding domain and two transactivation domains of RIOK2 that are critical to regulate key hematopoietic TFs GATA1, GATA2, SPI1, RUNX3 and KLF1. This establishes RIOK2 as an integral component of the transcriptional regulatory network governing human hematopoietic differentiation. Importantly, RIOK2 mRNA expression significantly correlates with these TFs and other hematopoietic genes in myelodysplastic syndromes, acute myeloid leukemia and chronic kidney disease. Further investigation of RIOK2-mediated transcriptional pathways should yield therapeutic approaches to correct defective hematopoiesis in hematologic disorders.
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Affiliation(s)
- Shrestha Ghosh
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.,Department of Immunology, Harvard Medical School, Boston, MA, USA
| | - Mahesh Raundhal
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.,Department of Immunology, Harvard Medical School, Boston, MA, USA.,Jnana Therapeutics, Boston, MA, USA
| | - Samuel A Myers
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.,La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Steven A Carr
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Xi Chen
- Department of Molecular & Cellular Biology, Lester and Sue Smith Breast Center, Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - Gregory A Petsko
- Department of Neurology, Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
| | - Laurie H Glimcher
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA. .,Department of Immunology, Harvard Medical School, Boston, MA, USA. .,Department of Medicine, Harvard Medical School, Boston, MA, USA.
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18
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Hidalgo D, Bejder J, Pop R, Gellatly K, Hwang Y, Maxwell Scalf S, Eastman AE, Chen JJ, Zhu LJ, Heuberger JAAC, Guo S, Koury MJ, Nordsborg NB, Socolovsky M. EpoR stimulates rapid cycling and larger red cells during mouse and human erythropoiesis. Nat Commun 2021; 12:7334. [PMID: 34921133 PMCID: PMC8683474 DOI: 10.1038/s41467-021-27562-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 11/19/2021] [Indexed: 11/08/2022] Open
Abstract
The erythroid terminal differentiation program couples sequential cell divisions with progressive reductions in cell size. The erythropoietin receptor (EpoR) is essential for erythroblast survival, but its other functions are not well characterized. Here we use Epor-/- mouse erythroblasts endowed with survival signaling to identify novel non-redundant EpoR functions. We find that, paradoxically, EpoR signaling increases red cell size while also increasing the number and speed of erythroblast cell cycles. EpoR-regulation of cell size is independent of established red cell size regulation by iron. High erythropoietin (Epo) increases red cell size in wild-type mice and in human volunteers. The increase in mean corpuscular volume (MCV) outlasts the duration of Epo treatment and is not the result of increased reticulocyte number. Our work shows that EpoR signaling alters the relationship between cycling and cell size. Further, diagnostic interpretations of increased MCV should now include high Epo levels and hypoxic stress.
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Affiliation(s)
- Daniel Hidalgo
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Jacob Bejder
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark
| | - Ramona Pop
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA
- Harvard Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
| | - Kyle Gellatly
- Program in Bioinformatics and Computational Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Yung Hwang
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - S Maxwell Scalf
- Department of Cell Biology and Yale Stem Cell Center, Yale University, New Haven, CT, USA
| | - Anna E Eastman
- Department of Cell Biology and Yale Stem Cell Center, Yale University, New Haven, CT, USA
| | - Jane-Jane Chen
- Institute for Medical Engineering & Science, MIT, Cambridge, MA, USA
| | - Lihua Julie Zhu
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA
- Program in Bioinformatics and Computational Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA
- Department of Molecular Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | | | - Shangqin Guo
- Department of Cell Biology and Yale Stem Cell Center, Yale University, New Haven, CT, USA
| | - Mark J Koury
- Department of Medicine, Division of Hematology and Oncology, Vanderbilt University Medical Center, Nashville, TN, USA
| | | | - Merav Socolovsky
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA.
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19
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Mukherjee K, Bieker JJ. Transcriptional Control of Gene Expression and the Heterogeneous Cellular Identity of Erythroblastic Island Macrophages. Front Genet 2021; 12:756028. [PMID: 34880902 PMCID: PMC8646026 DOI: 10.3389/fgene.2021.756028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 11/04/2021] [Indexed: 11/13/2022] Open
Abstract
During definitive erythropoiesis, maturation of erythroid progenitors into enucleated reticulocytes requires the erythroblastic island (EBI) niche comprising a central macrophage attached to differentiating erythroid progenitors. Normally, the macrophage provides a nurturing environment for maturation of erythroid cells. Its critical physiologic importance entails aiding in recovery from anemic insults, such as systemic stress or acquired disease. Considerable interest in characterizing the central macrophage of the island niche led to the identification of putative cell surface markers enriched in island macrophages, enabling isolation and characterization. Recent studies focus on bulk and single cell transcriptomics of the island macrophage during adult steady-state erythropoiesis and embryonic erythropoiesis. They reveal that the island macrophage is a distinct cell type but with widespread cellular heterogeneity, likely suggesting distinct developmental origins and biological function. These studies have also uncovered transcriptional programs that drive gene expression in the island macrophage. Strikingly, the master erythroid regulator EKLF/Klf1 seems to also play a major role in specifying gene expression in island macrophages, including a putative EKLF/Klf1-dependent transcription circuit. Our present review and analysis of mouse single cell genetic patterns suggest novel expression characteristics that will enable a clear enrichment of EBI subtypes and resolution of island macrophage heterogeneity. Specifically, the discovery of markers such as Epor, and specific features for EKLF/Klf1-expressing island macrophages such as Sptb and Add2, or for SpiC-expressing island macrophage such as Timd4, or for Maf/Nr1h3-expressing island macrophage such as Vcam1, opens exciting possibilities for further characterization of these unique macrophage cell types in the context of their critical developmental function.
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Affiliation(s)
- Kaustav Mukherjee
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, New York, NY, United States.,Black Family Stem Cell Institute, Mount Sinai School of Medicine, New York, NY, United States
| | - James J Bieker
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, New York, NY, United States.,Black Family Stem Cell Institute, Mount Sinai School of Medicine, New York, NY, United States.,Tisch Cancer Center, Mount Sinai School of Medicine, New York, NY, United States.,Mindich Child Health and Development Institute, Mount Sinai School of Medicine, New York, NY, United States
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20
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de Miranda FS, Barauna VG, dos Santos L, Costa G, Vassallo PF, Campos LCG. Properties and Application of Cell-Free DNA as a Clinical Biomarker. Int J Mol Sci 2021; 22:9110. [PMID: 34502023 PMCID: PMC8431421 DOI: 10.3390/ijms22179110] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/18/2021] [Accepted: 04/20/2021] [Indexed: 12/17/2022] Open
Abstract
Biomarkers are valuable tools in clinical practice. In 2001, the National Institutes of Health (NIH) standardized the definition of a biomarker as a characteristic that is objectively measured and evaluated as an indicator of normal biological processes, pathogenic processes, or pharmacological responses to a therapeutic intervention. A biomarker has clinical relevance when it presents precision, standardization and reproducibility, suitability to the patient, straightforward interpretation by clinicians, and high sensitivity and/or specificity by the parameter it proposes to identify. Thus, serum biomarkers should have advantages related to the simplicity of the procedures and to the fact that venous blood collection is commonplace in clinical practice. We described the potentiality of cfDNA as a general clinical biomarker and focused on endothelial dysfunction. Circulating cell-free DNA (cfDNA) refers to extracellular DNA present in body fluid that may be derived from both normal and diseased cells. An increasing number of studies demonstrate the potential use of cfDNA as a noninvasive biomarker to determine physiologic and pathologic conditions. However, although still scarce, increasing evidence has been reported regarding using cfDNA in cardiovascular diseases. Here, we have reviewed the history of cfDNA, its source, molecular features, and release mechanism. We also show recent studies that have investigated cfDNA as a possible marker of endothelial damage in clinical settings. In the cardiovascular system, the studies are quite new, and although interesting, stronger evidence is still needed. However, some drawbacks in cfDNA methodologies should be overcome before its recommendation as a biomarker in the clinical setting.
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Affiliation(s)
- Felipe Silva de Miranda
- Post Graduation Program in Biology and Biotechnology of Microorganisms, State University of Santa Cruz, Ilhéus 45662-900, Bahia, Brazil;
- Department of Biological Science, State University of Santa Cruz, Ilhéus 45662-900, Bahia, Brazil
- Laboratory of Applied Pathology and Genetics, State University of Santa Cruz, Ilhéus 45662-900, Bahia, Brazil
| | - Valério Garrone Barauna
- Post Graduation Program in Health Sciences, State University of Santa Cruz, Ilhéus 45662-900, Bahia, Brazil;
- Molecular Physiology Laboratory of Exercise Science, Federal University of Espírito Santo, Vitória 29075-910, Espírito Santo, Brazil
- Post Graduation Program in Physiological Sciences, Federal University of Espírito Santo, Vitória 29075-910, Espírito Santo, Brazil; (G.C.); (P.F.V.)
| | - Leandro dos Santos
- Academic Unit of Serra Talhada, Rural Federal University of Pernambuco, Serra Talhada 56909-535, Pernambuco, Brazil;
| | - Gustavo Costa
- Post Graduation Program in Physiological Sciences, Federal University of Espírito Santo, Vitória 29075-910, Espírito Santo, Brazil; (G.C.); (P.F.V.)
| | - Paula Frizera Vassallo
- Post Graduation Program in Physiological Sciences, Federal University of Espírito Santo, Vitória 29075-910, Espírito Santo, Brazil; (G.C.); (P.F.V.)
- Clinical Hospital, Federal University of Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Luciene Cristina Gastalho Campos
- Post Graduation Program in Biology and Biotechnology of Microorganisms, State University of Santa Cruz, Ilhéus 45662-900, Bahia, Brazil;
- Department of Biological Science, State University of Santa Cruz, Ilhéus 45662-900, Bahia, Brazil
- Laboratory of Applied Pathology and Genetics, State University of Santa Cruz, Ilhéus 45662-900, Bahia, Brazil
- Post Graduation Program in Health Sciences, State University of Santa Cruz, Ilhéus 45662-900, Bahia, Brazil;
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21
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Mei Y, Liu Y, Ji P. Understanding terminal erythropoiesis: An update on chromatin condensation, enucleation, and reticulocyte maturation. Blood Rev 2021; 46:100740. [PMID: 32798012 DOI: 10.1016/j.blre.2020.100740] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/02/2020] [Accepted: 08/05/2020] [Indexed: 12/19/2022]
Abstract
A characteristic feature of terminal erythropoiesis in mammals is extrusion of the highly condensed nucleus out of the cytoplasm. Other vertebrates, including fish, reptiles, amphibians, and birds, undergo nuclear condensation but do not enucleate. Enucleation provides mammals evolutionary advantages by gaining extra space for hemoglobin and being more flexible to migrate through capillaries. Nascent reticulocytes further mature into red blood cells through membrane and proteome remodeling and organelle clearance. Over the past decade, novel molecular mechanisms and signaling pathways have been uncovered that play important roles in chromatin condensation, enucleation, and reticulocyte maturation. These advances not only increase understanding of the physiology of erythropoiesis, but also facilitate efforts in generating in vitro red blood cells for various translational application. In the present review, recent studies in epigenetic modification and release of histones during chromatin condensation are highlighted. New insights in enucleation, including protein sorting, vesicle trafficking, transcriptional regulation, noncoding RNA, cytoskeleton remodeling, erythroblastic islands, and cytokinesis, are summarized. Moreover, organelle clearance and proteolysis mediated by ubiquitin-proteasome degradation during reticulocytes maturation is also examined. Perspectives for future directions in this rapidly evolving research area are also provided.
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Affiliation(s)
- Yang Mei
- Department of Pathology, Northwestern University, Chicago, IL, USA.
| | - Yijie Liu
- Department of Pathology, Northwestern University, Chicago, IL, USA.
| | - Peng Ji
- Department of Pathology, Northwestern University, Chicago, IL, USA.
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22
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Mukherjee K, Xue L, Planutis A, Gnanapragasam MN, Chess A, Bieker JJ. EKLF/KLF1 expression defines a unique macrophage subset during mouse erythropoiesis. eLife 2021; 10:61070. [PMID: 33570494 PMCID: PMC7932694 DOI: 10.7554/elife.61070] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 02/10/2021] [Indexed: 12/17/2022] Open
Abstract
Erythroblastic islands are a specialized niche that contain a central macrophage surrounded by erythroid cells at various stages of maturation. However, identifying the precise genetic and transcriptional control mechanisms in the island macrophage remains difficult due to macrophage heterogeneity. Using unbiased global sequencing and directed genetic approaches focused on early mammalian development, we find that fetal liver macrophages exhibit a unique expression signature that differentiates them from erythroid and adult macrophage cells. The importance of erythroid Krüppel-like factor (EKLF)/KLF1 in this identity is shown by expression analyses in EKLF-/- and in EKLF-marked macrophage cells. Single-cell sequence analysis simplifies heterogeneity and identifies clusters of genes important for EKLF-dependent macrophage function and novel cell surface biomarkers. Remarkably, this singular set of macrophage island cells appears transiently during embryogenesis. Together, these studies provide a detailed perspective on the importance of EKLF in the establishment of the dynamic gene expression network within erythroblastic islands in the developing embryo and provide the means for their efficient isolation.
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Affiliation(s)
- Kaustav Mukherjee
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of MedicineNew York, NYUnited States
- Black Family Stem Cell InstituteNew York, NYUnited States
| | - Li Xue
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of MedicineNew York, NYUnited States
| | - Antanas Planutis
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of MedicineNew York, NYUnited States
| | - Merlin Nithya Gnanapragasam
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of MedicineNew York, NYUnited States
| | - Andrew Chess
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of MedicineNew York, NYUnited States
| | - James J Bieker
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of MedicineNew York, NYUnited States
- Black Family Stem Cell InstituteNew York, NYUnited States
- Tisch Cancer InstituteNew York, NYUnited States
- Mindich Child Health and Development Institute, Mount Sinai School of MedicineNew York, NYUnited States
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23
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Liu Q, Luo L, Ren C, Zou M, Yang S, Cai B, Wu L, Wang Y, Fu S, Hua X, Tang N, Huang S, Huang X, Xin W, Chen F, Zhang X. The opposing roles of the mTOR signaling pathway in different phases of human umbilical cord blood-derived CD34 + cell erythropoiesis. Stem Cells 2020; 38:1492-1505. [PMID: 32871057 PMCID: PMC7693065 DOI: 10.1002/stem.3268] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 06/25/2020] [Accepted: 07/10/2020] [Indexed: 02/05/2023]
Abstract
As an indispensable, even lifesaving practice, red blood cell (RBC) transfusion is challenging due to several issues, including supply shortage, immune incompatibility, and blood-borne infections since donated blood is the only source of RBCs. Although large-scale in vitro production of functional RBCs from human stem cells is a promising alternative, so far, no such system has been reported to produce clinically transfusable RBCs due to the poor understanding of mechanisms of human erythropoiesis, which is essential for the optimization of in vitro erythrocyte generation system. We previously reported that inhibition of mammalian target of rapamycin (mTOR) signaling significantly decreased the percentage of erythroid progenitor cells in the bone marrow of wild-type mice. In contrast, rapamycin treatment remarkably improved terminal maturation of erythroblasts and anemia in a mouse model of β-thalassemia. In the present study, we investigated the effect of mTOR inhibition with rapamycin from different time points on human umbilical cord blood-derived CD34+ cell erythropoiesis in vitro and the underlying mechanisms. Our data showed that rapamycin treatment significantly suppressed erythroid colony formation in the commitment/proliferation phase of erythropoiesis through inhibition of cell-cycle progression and proliferation. In contrast, during the maturation phase of erythropoiesis, mTOR inhibition dramatically promoted enucleation and mitochondrial clearance by enhancing autophagy. Collectively, our results suggest contrasting roles for mTOR in regulating different phases of human erythropoiesis.
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Affiliation(s)
- Qian Liu
- Laboratory of Molecular CardiologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
- Shantou University Medical CollegeShantouPeople's Republic of China
| | - Linhong Luo
- Department of Obstetrics and GynecologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
| | - Chunhong Ren
- Department of International Medical ServiceThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
| | - Muping Zou
- Laboratory of Molecular CardiologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
| | - Siqin Yang
- Laboratory of Molecular CardiologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
| | - Bozhi Cai
- Laboratory of Molecular CardiologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
| | - Libiao Wu
- Laboratory of Molecular CardiologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
| | - Yunsheng Wang
- Laboratory of Molecular CardiologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
| | - Shan Fu
- Shantou University Medical CollegeShantouPeople's Republic of China
| | - Xu Hua
- Shantou University Medical CollegeShantouPeople's Republic of China
| | - Nianping Tang
- Shantou University Medical CollegeShantouPeople's Republic of China
| | - Shiping Huang
- Shantou University Medical CollegeShantouPeople's Republic of China
| | - Xianxi Huang
- Intensive Care Unit, The First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
| | - Wen Xin
- Beijing TransGen Biotech Co., Ltd.BeijingPeople's Republic of China
| | - Feiheng Chen
- Department of HematologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
| | - Xin Zhang
- Laboratory of Molecular CardiologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
- Shantou University Medical CollegeShantouPeople's Republic of China
- Department of CardiologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
- Laboratory of Medical Molecular ImagingThe First Affiliated Hospital of Shantou University Medical CollegeShantouPeople's Republic of China
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24
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Kulczynska-Figurny K, Bieker JJ, Siatecka M. Severe anemia caused by dominant mutations in Krüppel-like factor 1 (KLF1). MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2020; 786:108336. [PMID: 33339573 DOI: 10.1016/j.mrrev.2020.108336] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/23/2020] [Accepted: 09/29/2020] [Indexed: 10/23/2022]
Abstract
The etiology and severity of anemia, a common blood disorder, are diverse. Dominant mutations in Krüppel-like factor 1 (KLF1/EKLF) underlie the molecular basis for some of them. KLF1 is a zinc finger transcription factor that plays an essential role in red blood cell proliferation and differentiation. Mutations have been identified in the KLF1 gene that cause hematologic diseases. Two of these alter one allele but generate an extreme phenotype: the mouse Nan mutation (E339D) leads to hemolytic neonatal anemia with hereditary spherocytosis, and the human CDA mutation (E325K) causes congenital dyserythropoietic anemia (CDA) type IV. These modify functionally important amino acids in the zinc finger DNA-binding domain at positions involved in direct interactions with regulatory elements of KLF1's target genes. Although the two dominant mutations alter the same evolutionarily conserved glutamic acid residue, the substitutions are not equivalent and lead to divergent consequences for the molecular mechanisms underlying activity of these mutants, particularly in recognition and interaction with their unique binding sites. Consequently, the properties of the protein are transformed such that it acquires novel dominant characteristics whose effects may not be limited to the erythroid compartment. KLF1 mutants cause loss-of-function/haploinsufficiency effects on some KLF1 wild-type target genes, while at the same time gain-of-function effects activate ectopic sites and neomorphic gene expression. Such anomalies not only lead to intrinsic red cell problems, but also to expression of non-erythroid genes that systemically disturb organ development. This review highlights recent molecular, biochemical, and genetic studies of KLF1 mutants, particularly the dramatic consequences that come from just a single amino acid change. The study of these variants provides an important contribution to the overall understanding of the DNA-protein interface of the zinc finger subtype of transcription factors, and the potential clinical consequences of what might appear to be a minor change in sequence.
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Affiliation(s)
| | - James J Bieker
- Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Miroslawa Siatecka
- Department of Genetics, Faculty of Biology, University of Adam Mickiewicz, Poznan, 61-614, Poland.
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25
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Sawaengdee W, Cui K, Zhao K, Hongeng S, Fucharoen S, Wongtrakoongate P. Genome-Wide Transcriptional Regulation of the Long Non-coding RNA Steroid Receptor RNA Activator in Human Erythroblasts. Front Genet 2020; 11:850. [PMID: 32849830 PMCID: PMC7431964 DOI: 10.3389/fgene.2020.00850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 07/13/2020] [Indexed: 01/21/2023] Open
Abstract
Erythropoiesis of human hematopoietic stem cells (HSCs) maintains generation of red blood cells throughout life. However, little is known how human erythropoiesis is regulated by long non-coding RNAs (lncRNAs). By using ChIRP-seq, we report here that the lncRNA steroid receptor RNA activator (SRA) occupies chromatin, and co-localizes with CTCF, H3K4me3, and H3K27me3 genome-wide in human erythroblast cell line K562. CTCF binding sites that are also occupied by SRA are enriched for either H3K4me3 or H3K27me3. Transcriptome-wide analyses reveal that SRA facilitates expression of erythroid-associated genes, while repressing leukocyte-associated genes in both K562 and CD36-positive primary human proerythroblasts derived from HSCs. We find that SRA-regulated genes are enriched by both CTCF and SRA bindings. Further, silencing of SRA decreases expression of the erythroid-specific markers TFRC and GYPA, and down-regulates expression of globin genes in both K562 and human proerythroblast cells. Taken together, our findings establish that the lncRNA SRA occupies chromatin, and promotes transcription of erythroid genes, therefore facilitating human erythroid transcriptional program.
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Affiliation(s)
- Waritta Sawaengdee
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Kairong Cui
- Laboratory of Epigenome Biology, Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Keji Zhao
- Laboratory of Epigenome Biology, Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Suradej Hongeng
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Suthat Fucharoen
- Thalassemia Research Center, Institute of Molecular Biosciences, Mahidol University, Bangkok, Thailand
| | - Patompon Wongtrakoongate
- Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
- Center for Neuroscience, Faculty of Science, Mahidol University, Bangkok, Thailand
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26
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27
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Mansoor A, Mansoor MO, Patel JL, Zhao S, Natkunam Y, Bieker JJ. KLF1/EKLF expression in acute leukemia is correlated with chromosomal abnormalities. Blood Cells Mol Dis 2020; 83:102434. [PMID: 32311573 DOI: 10.1016/j.bcmd.2020.102434] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/20/2020] [Accepted: 03/20/2020] [Indexed: 12/15/2022]
Abstract
KLF1 (EKLF) is a master regulator of erythropoiesis and controls expression of a wide array of target genes. We interrogated human tissue microarray samples via immunohistological analysis to address whether levels of KLF1 protein are associated with leukemia. We have made the unexpected findings that higher KLF1 levels are correlated with cells containing abnormal chromosomes, and that high KLF1 expression is not limited to acute myeloid leukemia (AML) associated with erythroid/megakaryoblastic differentiation. Expression of KLF1 is associated with poor survival. Further analyses reveal that KLF1 directly regulates a number of genes that play a role in chromosomal integrity. Together these results suggest that monitoring KLF1 levels may provide a new marker for risk stratification and prognosis in patients with AML.
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Affiliation(s)
- Adnan Mansoor
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Canada
| | - Mohammad Omer Mansoor
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Canada
| | - Jay L Patel
- Department of Pathology, University of Utah, Salt Lake City, UT, USA
| | - Shuchun Zhao
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Yasodha Natkunam
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - James J Bieker
- Department of Cell, Developmental, & Regenerative Biology, Black Family Stem Cell Institute, Tisch Cancer Institute, Mount Sinai School of Medicine, New York, NY, USA.
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28
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Yeo JH, Lam YW, Fraser ST. Cellular dynamics of mammalian red blood cell production in the erythroblastic island niche. Biophys Rev 2019; 11:873-894. [PMID: 31418139 PMCID: PMC6874942 DOI: 10.1007/s12551-019-00579-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 07/08/2019] [Indexed: 12/12/2022] Open
Abstract
Red blood cells, or erythrocytes, make up approximately a quarter of all cells in the human body with over 2 billion new erythrocytes made each day in a healthy adult human. This massive cellular production system is coupled with a set of cell biological processes unique to mammals, in particular, the elimination of all organelles, and the expulsion and destruction of the condensed erythroid nucleus. Erythrocytes from birds, reptiles, amphibians and fish possess nuclei, mitochondria and other organelles: erythrocytes from mammals lack all of these intracellular components. This review will focus on the dynamic changes that take place in developing erythroid cells that are interacting with specialized macrophages in multicellular clusters termed erythroblastic islands. Proerythroblasts enter the erythroblastic niche as large cells with active nuclei, mitochondria producing heme and energy, and attach to the central macrophage via a range of adhesion molecules. Proerythroblasts then mature into erythroblasts and, following enucleation, in reticulocytes. When reticulocytes exit the erythroblastic island, they are smaller cells, without nuclei and with few mitochondria, possess some polyribosomes and have a profoundly different surface molecule phenotype. Here, we will review, step-by-step, the biophysical mechanisms that regulate the remarkable process of erythropoiesis with a particular focus on the events taking place in the erythroblastic island niche. This is presented from the biological perspective to offer insight into the elements of red blood cell development in the erythroblastic island niche which could be further explored with biophysical modelling systems.
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Affiliation(s)
- Jia Hao Yeo
- Discipline of Anatomy and Histology, School of Medical Sciences, University of Sydney, Sydney, Australia.
- School of Chemistry, University of Sydney, Sydney, Australia.
- Discipline of Physiology, School of Medical Sciences, University of Sydney, Sydney, Australia.
| | - Yun Wah Lam
- Department of Chemistry, City University of Hong Kong, Kowloon Tong, Hong Kong
| | - Stuart T Fraser
- Discipline of Anatomy and Histology, School of Medical Sciences, University of Sydney, Sydney, Australia.
- Discipline of Physiology, School of Medical Sciences, University of Sydney, Sydney, Australia.
- Bosch Institute, School of Medical Sciences, University of Sydney, Sydney, Australia.
- University of Sydney Nano Institute, Sydney, Australia.
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29
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PPAR- γ Ligand Inhibits Nasopharyngeal Carcinoma Cell Proliferation and Metastasis by Regulating E2F2. PPAR Res 2019; 2019:8679271. [PMID: 31467515 PMCID: PMC6699258 DOI: 10.1155/2019/8679271] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 06/23/2019] [Accepted: 07/03/2019] [Indexed: 12/20/2022] Open
Abstract
Purpose Peroxisome proliferator-activated receptor-γ (PPAR-γ) is a nuclear hormone receptor with a key role in lipid metabolism. Previous studies have identified various roles of PPAR-γ in cell cycle progression, cellular proliferation, and tumor progression. However, no report has described a role for PPAR-γ in human nasopharyngeal carcinoma (NPC). Notably, some studies have reported a relationship between PPAR-γ and E2F transcription factor 2 (E2F2), which has been identified as a regulator of cell cycle, apoptosis, and the DNA damage response. Notably, E2F2 has also been reported to correlate with a poor prognosis in patients with various malignancies. Methods We used immunohistochemical (IHC) and western blot methods to evaluate PPAR-γ and E2F2 expression and function in nonkeratinizing NPC and nasopharyngitis (NPG) tissue samples, as well as western blotting and CCK8 analyses in the NPC cell lines, CNE1 and CNE2. Results We observed lower levels of PPAR-γ expression in nonkeratinizing NPC tissues compared with NPG tissues and determined an association between a low level of PPAR-γ expression with a more advanced tumor stage. Furthermore, strong E2F2 expression was detected in nonkeratinizing NPC tissues. We further demonstrated that rosiglitazone, a PPAR-γ agonist, reduced E2F2 expression and proliferation in NPC cell lines. Conclusions Our study results revealed a novel role for the PPAR-γ–E2F2 pathway in controlling NPC cell proliferation and metastasis.
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30
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Ilsley MD, Huang S, Magor GW, Landsberg MJ, Gillinder KR, Perkins AC. Corrupted DNA-binding specificity and ectopic transcription underpin dominant neomorphic mutations in KLF/SP transcription factors. BMC Genomics 2019; 20:417. [PMID: 31126231 PMCID: PMC6534859 DOI: 10.1186/s12864-019-5805-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 05/17/2019] [Indexed: 02/07/2023] Open
Abstract
Background Mutations in the transcription factor, KLF1, are common within certain populations of the world. Heterozygous missense mutations in KLF1 mostly lead to benign phenotypes, but a heterozygous mutation in a DNA-binding residue (E325K in human) results in severe Congenital Dyserythropoietic Anemia type IV (CDA IV); i.e. an autosomal-dominant disorder characterized by neonatal hemolysis. Results To investigate the biochemical and genetic mechanism of CDA IV, we generated murine erythroid cell lines that harbor tamoxifen-inducible (ER™) versions of wild type and mutant KLF1 on a Klf1−/− genetic background. Nuclear translocation of wild type KLF1 results in terminal erythroid differentiation, whereas mutant KLF1 results in hemolysis without differentiation. The E to K variant binds poorly to the canonical 9 bp recognition motif (NGG-GYG-KGG) genome-wide but binds at high affinity to a corrupted motif (NGG-GRG-KGG). We confirmed altered DNA-binding specificity by quantitative in vitro binding assays of recombinant zinc-finger domains. Our results are consistent with previously reported structural data of KLF-DNA interactions. We employed 4sU-RNA-seq to show that a corrupted transcriptome is a direct consequence of aberrant DNA binding. Conclusions Since all KLF/SP family proteins bind DNA in an identical fashion, these results are likely to be generally applicable to mutations in all family members. Importantly, they explain how certain mutations in the DNA-binding domain of transcription factors can generate neomorphic functions that result in autosomal dominant disease. Electronic supplementary material The online version of this article (10.1186/s12864-019-5805-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Melissa D Ilsley
- Mater Research, Translational Research Institute, University of Queensland, Brisbane, QLD, Australia.,School of Biomedical Sciences, University of Queensland, Brisbane, QLD, Australia
| | - Stephen Huang
- Mater Research, Translational Research Institute, University of Queensland, Brisbane, QLD, Australia.,School of Biomedical Sciences, University of Queensland, Brisbane, QLD, Australia
| | - Graham W Magor
- Mater Research, Translational Research Institute, University of Queensland, Brisbane, QLD, Australia.,Australian Centre for Blood Diseases, Monash University, Melbourne, VIC, Australia
| | - Michael J Landsberg
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, QLD, Australia
| | - Kevin R Gillinder
- Mater Research, Translational Research Institute, University of Queensland, Brisbane, QLD, Australia. .,Australian Centre for Blood Diseases, Monash University, Melbourne, VIC, Australia.
| | - Andrew C Perkins
- Mater Research, Translational Research Institute, University of Queensland, Brisbane, QLD, Australia.,Australian Centre for Blood Diseases, Monash University, Melbourne, VIC, Australia
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31
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Varricchio L, Planutis A, Manwani D, Jaffray J, Mitchell WB, Migliaccio AR, Bieker JJ. Genetic disarray follows mutant KLF1-E325K expression in a congenital dyserythropoietic anemia patient. Haematologica 2019; 104:2372-2380. [PMID: 30872368 PMCID: PMC6959163 DOI: 10.3324/haematol.2018.209858] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 03/12/2019] [Indexed: 12/20/2022] Open
Abstract
Congenital dyserythropoietic anemia type IV is caused by a heterozygous mutation, Glu325Lys (E325K), in the KLF1 transcription factor. Molecular characteristics of this disease have not been clarified, partly due to its rarity. We expanded erythroid cells from a patient's peripheral blood and analyzed its global expression pattern. We find that a large number of erythroid pathways are disrupted, particularly those related to membrane transport, globin regulation, and iron utilization. The altered genetics lead to significant deficits in differentiation. Glu325 is within the KLF1 zinc finger domain at an amino acid critical for site specific DNA binding. The change to Lys is predicted to significantly alter the target site recognition sequence, both by subverting normal recognition and by enabling interaction with novel sites. Consistent with this, we find high level ectopic expression of genes not normally present in the red cell. These altered properties explain patients' clinical and phenotypic features, and elucidate the dominant character of the mutation.
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Affiliation(s)
- Lilian Varricchio
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Antanas Planutis
- Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Deepa Manwani
- Division of Hematology/Oncology, The Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Julie Jaffray
- Children's Hospital Los Angeles, University of Southern California Keck School of Medicine, Los Angeles, CA, USA
| | - W Beau Mitchell
- Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Anna Rita Migliaccio
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Dipartimento di Scienze Biomediche e NeuroMotorie, Alma Mater Studiorum, Università di Bologna, Bologna, Italy
| | - James J Bieker
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA .,Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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32
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Kohara H, Utsugisawa T, Sakamoto C, Hirose L, Ogawa Y, Ogura H, Sugawara A, Liao J, Aoki T, Iwasaki T, Asai T, Doisaki S, Okuno Y, Muramatsu H, Abe T, Kurita R, Miyamoto S, Sakuma T, Shiba M, Yamamoto T, Ohga S, Yoshida K, Ogawa S, Ito E, Kojima S, Kanno H, Tani K. KLF1 mutation E325K induces cell cycle arrest in erythroid cells differentiated from congenital dyserythropoietic anemia patient-specific induced pluripotent stem cells. Exp Hematol 2019; 73:25-37.e8. [PMID: 30876823 DOI: 10.1016/j.exphem.2019.03.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 03/05/2019] [Accepted: 03/06/2019] [Indexed: 02/06/2023]
Abstract
Krüppel-like factor 1 (KLF1), a transcription factor controlling definitive erythropoiesis, is involved in sequential control of terminal cell division and enucleation via fine regulation of key cell cycle regulator gene expression in erythroid lineage cells. Type IV congenital dyserythropoietic anemia (CDA) is caused by a monoallelic mutation at the second zinc finger of KLF1 (c.973G>A, p.E325K). We recently diagnosed a female patient with type IV CDA with the identical missense mutation. To understand the mechanism underlying the dyserythropoiesis caused by the mutation, we generated induced pluripotent stem cells (iPSCs) from the CDA patient (CDA-iPSCs). The erythroid cells that differentiated from CDA-iPSCs (CDA-erythroid cells) displayed multinucleated morphology, absence of CD44, and dysregulation of the KLF1 target gene expression. In addition, uptake of bromodeoxyuridine by CDA-erythroid cells was significantly decreased at the CD235a+/CD71+ stage, and microarray analysis revealed that cell cycle regulator genes were dysregulated, with increased expression of negative regulators such as CDKN2C and CDKN2A. Furthermore, inducible expression of the KLF1 E325K, but not the wild-type KLF1, caused a cell cycle arrest at the G1 phase in CDA-erythroid cells. Microarray analysis of CDA-erythroid cells and real-time polymerase chain reaction analysis of the KLF1 E325K inducible expression system also revealed altered expression of several KLF1 target genes including erythrocyte membrane protein band 4.1 (EPB41), EPB42, glutathione disulfide reductase (GSR), glucose phosphate isomerase (GPI), and ATPase phospholipid transporting 8A1 (ATP8A1). Our data indicate that the E325K mutation in KLF1 is associated with disruption of transcriptional control of cell cycle regulators in association with erythroid membrane or enzyme abnormalities, leading to dyserythropoiesis.
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Affiliation(s)
- Hiroshi Kohara
- Project Division of ALA Advanced Medical Research, The Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Taiju Utsugisawa
- Department of Transfusion Medicine and Cell Processing, Tokyo Women's Medical University, Tokyo, Japan
| | - Chika Sakamoto
- Division of Molecular and Clinical Genetics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Lisa Hirose
- Project Division of ALA Advanced Medical Research, The Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Yoshie Ogawa
- Project Division of ALA Advanced Medical Research, The Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Hiromi Ogura
- Department of Transfusion Medicine and Cell Processing, Tokyo Women's Medical University, Tokyo, Japan
| | - Ai Sugawara
- Project Division of ALA Advanced Medical Research, The Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Jiyuan Liao
- Project Division of ALA Advanced Medical Research, The Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Takako Aoki
- Department of Transfusion Medicine and Cell Processing, Tokyo Women's Medical University, Tokyo, Japan
| | - Takuya Iwasaki
- Department of Transfusion Medicine and Cell Processing, Tokyo Women's Medical University, Tokyo, Japan
| | | | - Sayoko Doisaki
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Okuno
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takaaki Abe
- Department of Research and Development, Central Blood Institute, Japanese Red Cross Society, Tokyo, Japan
| | - Ryo Kurita
- Department of Research and Development, Central Blood Institute, Japanese Red Cross Society, Tokyo, Japan
| | - Shohei Miyamoto
- Project Division of ALA Advanced Medical Research, The Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Tetsushi Sakuma
- Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, Hiroshima, Japan
| | - Masayuki Shiba
- Department of Research and Development, Central Blood Institute, Japanese Red Cross Society, Tokyo, Japan
| | - Takashi Yamamoto
- Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, Hiroshima, Japan
| | - Shouichi Ohga
- Department of Pediatrics, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Kenichi Yoshida
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Etsuro Ito
- Department of Pediatrics, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Seiji Kojima
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hitoshi Kanno
- Department of Transfusion Medicine and Cell Processing, Tokyo Women's Medical University, Tokyo, Japan.
| | - Kenzaburo Tani
- Project Division of ALA Advanced Medical Research, The Institute of Medical Science, University of Tokyo, Tokyo, Japan; Division of Molecular and Clinical Genetics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan; Department of Advanced Molecular and Cell Therapy, Kyushu University Hospital, Fukuoka, Japan.
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Integrative view on how erythropoietin signaling controls transcription patterns in erythroid cells. Curr Opin Hematol 2019; 25:189-195. [PMID: 29389768 DOI: 10.1097/moh.0000000000000415] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
PURPOSE OF REVIEW Erythropoietin (EPO) is necessary and sufficient to trigger dynamic transcriptional patterns that drive the differentiation of erythroid precursor cells into mature, enucleated red cells. Because the molecular cloning and Food and Drug Administration approval for the therapeutic use of EPO over 30 years ago, a detailed understanding of how EPO works has advanced substantially. Yet, the precise epigenetic and transcriptional mechanisms by which EPO signaling controls erythroid expression patterns remains poorly understood. This review focuses on the current state of erythroid biology in regards to EPO signaling from human genetics and functional genomics perspectives. RECENT FINDINGS The goal of this review is to provide an integrative view of the gene regulatory underpinnings for erythroid expression patterns that are dynamically shaped during erythroid differentiation. Here, we highlight vignettes connecting recent insights into a genome-wide association study linking an EPO mutation to anemia, a study linking EPO-signaling to signal transducer and activator of transcription 5 (STAT5) chromatin occupancy and enhancers, and studies that examine the molecular mechanisms driving topological chromatin organization in erythroid cells. SUMMARY The genetic, epigenetic, and gene regulatory mechanisms underlying how hormone signal transduction influences erythroid gene expression remains only partly understood. A detailed understanding of these molecular pathways and how they intersect with one another will provide the basis for novel strategies to treat anemia and potentially other hematological diseases. As new regulators and signal transducers of EPO-signaling continue to emerge, new clinically relevant targets may be identified that improve the specificity and effectiveness of EPO therapy.
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Abstract
We identified a child with KLF1-E325K congenital dyserythropoietic anemia type IV who experienced a severe clinical course, fetal anemia, hydrops fetalis, and postnatal transfusion dependence only partially responsive to splenectomy. The child also had complete sex reversal, the cause which remains undetermined. To gain insights into our patient's severe hematologic phenotype, detailed analyses were performed. Erythrocytes from the patient and parents demonstrated functional abnormalities of the erythrocyte membrane, attributed to variants in the α-spectrin gene. Hypomorphic alleles in SEC23B and YARS2 were also identified. We hypothesize that coinheritance of variants in relevant erythrocyte genes contribute to the clinical course in our patient and other E325K-linked congenital dyserythropoietic anemia IV patients with severe clinical phenotypes.
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Huang NJ, Lin YC, Lin CY, Pishesha N, Lewis CA, Freinkman E, Farquharson C, Millán JL, Lodish H. Enhanced phosphocholine metabolism is essential for terminal erythropoiesis. Blood 2018; 131:2955-2966. [PMID: 29712634 PMCID: PMC6024642 DOI: 10.1182/blood-2018-03-838516] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 04/26/2018] [Indexed: 12/18/2022] Open
Abstract
Red cells contain a unique constellation of membrane lipids. Although much is known about regulated protein expression, the regulation of lipid metabolism during erythropoiesis is poorly studied. Here, we show that transcription of PHOSPHO1, a phosphoethanolamine and phosphocholine phosphatase that mediates the hydrolysis of phosphocholine to choline, is strongly upregulated during the terminal stages of erythropoiesis of both human and mouse erythropoiesis, concomitant with increased catabolism of phosphatidylcholine (PC) and phosphocholine as shown by global lipidomic analyses of mouse and human terminal erythropoiesis. Depletion of PHOSPHO1 impaired differentiation of fetal mouse and human erythroblasts, and, in adult mice, depletion impaired phenylhydrazine-induced stress erythropoiesis. Loss of PHOSPHO1 also impaired phosphocholine catabolism in mouse fetal liver progenitors and resulted in accumulation of several lipids; adenosine triphosphate (ATP) production was reduced as a result of decreased oxidative phosphorylation. Glycolysis replaced oxidative phosphorylation in PHOSPHO1-knockout erythroblasts and the increased glycolysis was used for the production of serine or glycine. Our study elucidates the dynamic changes in lipid metabolism during terminal erythropoiesis and reveals the key roles of PC and phosphocholine metabolism in energy balance and amino acid supply.
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Affiliation(s)
- Nai-Jia Huang
- Whitehead Institute for Biomedical Research, Cambridge, MA
| | - Ying-Cing Lin
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA
| | - Chung-Yueh Lin
- Whitehead Institute for Biomedical Research, Cambridge, MA
- Department of Biology and
| | - Novalia Pishesha
- Whitehead Institute for Biomedical Research, Cambridge, MA
- Department of Biological Engineering, MIT, Cambridge, MA
| | | | | | - Colin Farquharson
- The Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - José Luis Millán
- Sanford Children's Health Research Center, La Jolla, CA; and
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Harvey Lodish
- Whitehead Institute for Biomedical Research, Cambridge, MA
- Department of Biology and
- Department of Biological Engineering, MIT, Cambridge, MA
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Gnanapragasam MN, Crispino JD, Ali AM, Weinberg R, Hoffman R, Raza A, Bieker JJ. Survey and evaluation of mutations in the human KLF1 transcription unit. Sci Rep 2018; 8:6587. [PMID: 29700354 PMCID: PMC5920080 DOI: 10.1038/s41598-018-24962-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 04/12/2018] [Indexed: 01/03/2023] Open
Abstract
Erythroid Krüppel-like Factor (EKLF/KLF1) is an erythroid-enriched transcription factor that plays a global role in all aspects of erythropoiesis, including cell cycle control and differentiation. We queried whether its mutation might play a role in red cell malignancies by genomic sequencing of the KLF1 transcription unit in cell lines, erythroid neoplasms, dysplastic disorders, and leukemia. In addition, we queried published databases from a number of varied sources. In all cases we only found changes in commonly notated SNPs. Our results suggest that if there are mutations in KLF1 associated with erythroid malignancies, they are exceedingly rare.
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Affiliation(s)
- Merlin Nithya Gnanapragasam
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, New York, NY, 10029, USA
| | - John D Crispino
- Department of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Abdullah M Ali
- Department of Medicine, Columbia University Medical Center, New York, NY, 10032, USA
| | - Rona Weinberg
- Cellular Therapy Laboratory, New York Blood Center, New York, NY, 10065, USA
| | - Ronald Hoffman
- Department of Medicine, Mount Sinai School of Medicine, New York, NY, 10029, USA
| | - Azra Raza
- Department of Medicine, Columbia University Medical Center, New York, NY, 10032, USA
| | - James J Bieker
- Department of Cell, Developmental, and Regenerative Biology, Mount Sinai School of Medicine, New York, NY, 10029, USA.
- Tisch Cancer Institute, Mount Sinai School of Medicine, New York, NY, 10029, USA.
- Black Familly Stem Cell Institute, Mount Sinai School of Medicine, New York, NY, 10029, USA.
- Mindich Child Health and Development Institute, Mount Sinai School of Medicine, New York, NY, 10029, USA.
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Moras M, Lefevre SD, Ostuni MA. From Erythroblasts to Mature Red Blood Cells: Organelle Clearance in Mammals. Front Physiol 2017; 8:1076. [PMID: 29311991 PMCID: PMC5742207 DOI: 10.3389/fphys.2017.01076] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 12/06/2017] [Indexed: 12/14/2022] Open
Abstract
Erythropoiesis occurs mostly in bone marrow and ends in blood stream. Mature red blood cells are generated from multipotent hematopoietic stem cells, through a complex maturation process involving several morphological changes to produce a highly functional specialized cells. In mammals, terminal steps involved expulsion of the nucleus from erythroblasts that leads to the formation of reticulocytes. In order to produce mature biconcave red blood cells, organelles and ribosomes are selectively eliminated from reticulocytes as well as the plasma membrane undergoes remodeling. The mechanisms involved in these last maturation steps are still under investigation. Enucleation involves dramatic chromatin condensation and establishment of the nuclear polarity, which is driven by a rearrangement of actin cytoskeleton and the clathrin-dependent generation of vacuoles at the nuclear-cytoplasmic junction. This process is favored by interaction between the erythroblasts and macrophages at the erythroblastic island. Mitochondria are eliminated by mitophagy. This is a macroautophagy pathway consisting in the engulfment of mitochondria into a double-membrane structure called autophagosome before degradation. Several mice knock-out models were developed to identify mitophagy-involved proteins during erythropoiesis, but whole mechanisms are not completely determined. Less is known concerning the clearance of other organelles, such as smooth and rough ER, Golgi apparatus and ribosomes. Understanding the modulators of organelles clearance in erythropoiesis may elucidate the pathogenesis of different dyserythropoietic diseases such as myelodysplastic syndrome, leukemia and anemia.
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Affiliation(s)
| | | | - Mariano A. Ostuni
- UMR-S1134 Integrated Biology of Red Blood Cell, INSERM, Université Paris Diderot, Sorbonne Paris Cité, Institut National de la Transfusion Sanguine, Laboratoire d'Excellence GR-Ex, Paris, France
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Genetic variation of Krüppel-like factor 1 (KLF1) and fetal hemoglobin (HbF) levels in β 0-thalassemia/HbE disease. Int J Hematol 2017; 107:297-310. [PMID: 29067594 DOI: 10.1007/s12185-017-2357-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 10/09/2017] [Accepted: 10/10/2017] [Indexed: 12/21/2022]
Abstract
Heterogeneity of HbF levels in β0-thalassemia/HbE disease has been reported to be associated with variations in clinical manifestations of the disease, and several genetic-modifying factors beyond the β-globin gene cluster have been identified as HbF regulators. Down-regulation or heterozygous mutations of Krüppel-like factor 1 (KLF1) is associated with elevated HbF levels in non-thalassemia subjects. This study confirms that experimental down-regulation of KLF1 in β0-thalassemia/HbE-derived erythroblasts significantly increases HbF production (up to 52.3 ± 2.4%), albeit with slightly delayed erythroid terminal differentiation. KLF1 exome sequencing of 130 Thai β0-thalassemia/HbE patients without co-inheritance of α-thalassemia found six patients with KLF1 heterozygous mutations including rs2072596 (p.F182L; n = 5) and rs745347362 (p.P284L; n = 1) missense mutations. However, while these patients had high HbF levels (38.1 ± 7.5%), they were all associated with a severe clinical phenotype. These results suggest that while reduction of KLF1 expression in β0-thalassemia/HbE erythroblasts can increase HbF levels, it is not sufficient to alleviate the clinical phenotype.
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39
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Tropomodulin 1 controls erythroblast enucleation via regulation of F-actin in the enucleosome. Blood 2017; 130:1144-1155. [PMID: 28729432 DOI: 10.1182/blood-2017-05-787051] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 07/03/2017] [Indexed: 01/01/2023] Open
Abstract
Biogenesis of mammalian red blood cells requires nuclear expulsion by orthochromatic erythoblasts late in terminal differentiation (enucleation), but the mechanism is largely unexplained. Here, we employed high-resolution confocal microscopy to analyze nuclear morphology and F-actin rearrangements during the initiation, progression, and completion of mouse and human erythroblast enucleation in vivo. Mouse erythroblast nuclei acquire a dumbbell-shaped morphology during enucleation, whereas human bone marrow erythroblast nuclei unexpectedly retain their spherical morphology. These morphological differences are linked to differential expression of Lamin isoforms, with primary mouse erythroblasts expressing only Lamin B and primary human erythroblasts only Lamin A/C. We did not consistently identify a continuous F-actin ring at the cell surface constriction in mouse erythroblasts, nor at the membrane protein-sorting boundary in human erythroblasts, which do not have a constriction, arguing against a contractile ring-based nuclear expulsion mechanism. However, both mouse and human erythroblasts contain an F-actin structure at the rear of the translocating nucleus, enriched in tropomodulin 1 (Tmod1) and nonmuscle myosin IIB. We investigated Tmod1 function in mouse and human erythroblasts both in vivo and in vitro and found that absence of Tmod1 leads to enucleation defects in mouse fetal liver erythroblasts, and in CD34+ hematopoietic stem and progenitor cells, with increased F-actin in the structure at the rear of the nucleus. This novel structure, the "enucleosome," may mediate common cytoskeletal mechanisms underlying erythroblast enucleation, notwithstanding the morphological heterogeneity of enucleation across species.
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