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An C, Xue F, Sun L, Han H, Zhang Y, Hu Y. The impact of erythroblast enucleation efficiency on the severity of anemia in patients with myelodysplastic syndrome. Cell Commun Signal 2023; 21:332. [PMID: 37986081 PMCID: PMC10658927 DOI: 10.1186/s12964-023-01353-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/11/2023] [Indexed: 11/22/2023] Open
Abstract
Anemia is the most common manifestation in myelodysplastic syndrome (MDS) patients, but the cause of ineffective hematopoiesis is not fully understood. Enucleation is an important event in the maturation process of erythroblasts. According to a series of morphological phenotypes of the pathological development of MDS erythroblasts, we speculate that there may be enucleation disorders. To verify this hypothesis, we cultured MDS bone marrow CD34+ cells in vitro and induced erythroblast development. The results showed that erythroblast enucleation in MDS was significantly lower than that in the normal group, and the rate of enucleation was positively correlated with hemoglobin concentration. Risk stratification of MDS was performed to further analyze the differences in enucleation among the normal group, low-middle risk group and high-risk group. The results showed that the enucleation rate of the high risk group was higher than that of the low-middle risk group but still lower than that of the normal group. Moreover, the expression of pERK and pAKT in MDS erythroblasts in the high risk group was higher than that in the normal group, while the expression of pERK and pAKT in the low-middle risk group was lower than that in the normal group. Furthermore, the enucleation of MDS was positively correlated with the phosphorylation degree of ERK and AKT. In conclusion, this study reveals that the enucleation of erythroblasts is one of the possible causes of anemia in MDS. Video Abstract.
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Affiliation(s)
- Chao An
- Department of Clinical Laboratory, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, 450014, Henan, China.
| | - Fumin Xue
- Henan Key Laboratory of Children's Genetics and Metabolic Diseases, Children's Hospital Affiliated to Zhengzhou University, Zhengzhou, 450000, Henan, China
| | - Ling Sun
- Department of Hematology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Haiyan Han
- Department of Clinical Laboratory, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, 450014, Henan, China
| | - Yali Zhang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, 450014, Henan, China
| | - Yibo Hu
- Department of Clinical Laboratory, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, 450014, Henan, China.
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Li M, Liu D, Xue F, Zhang H, Yang Q, Sun L, Qu X, Wu X, Zhao H, Liu J, Kang Q, Wang T, An X, Chen L. Stage-specific dual function: EZH2 regulates human erythropoiesis by eliciting histone and non-histone methylation. Haematologica 2023; 108:2487-2502. [PMID: 37021526 PMCID: PMC10483364 DOI: 10.3324/haematol.2022.282016] [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: 09/05/2022] [Accepted: 03/28/2023] [Indexed: 04/07/2023] Open
Abstract
Enhancer of zeste homolog 2 (EZH2) is the lysine methyltransferase of polycomb repressive complex 2 (PRC2) that catalyzes H3K27 tri-methylation. Aberrant expression and loss-of-function mutations of EZH2 have been demonstrated to be tightly associated with the pathogenesis of various myeloid malignancies characterized by ineffective erythropoiesis, such as myelodysplastic syndrome (MDS). However, the function and mechanism of EZH2 in human erythropoiesis still remains largely unknown. Here, we demonstrated that EZH2 regulates human erythropoiesis in a stage-specific, dual-function manner by catalyzing histone and non-histone methylation. During the early erythropoiesis, EZH2 deficiency caused cell cycle arrest in the G1 phase, which impaired cell growth and differentiation. Chromatin immunoprecipitation sequencing and RNA sequencing discovered that EZH2 knockdown caused a reduction of H3K27me3 and upregulation of cell cycle proteindependent kinase inhibitors. In contrast, EZH2 deficiency led to the generation of abnormal nuclear cells and impaired enucleation during the terminal erythropoiesis. Interestingly, EZH2 deficiency downregulated the methylation of HSP70 by directly interacting with HSP70. RNA-sequencing analysis revealed that the expression of AURKB was significantly downregulated in response to EZH2 deficiency. Furthermore, treatment with an AURKB inhibitor and small hairpin RNAmediated AURKB knockdown also led to nuclear malformation and decreased enucleation efficiency. These findings strongly suggest that EZH2 regulates terminal erythropoiesis through a HSP70 methylation-AURKB axis. Our findings have implications for improved understanding of ineffective erythropoiesis with EZH2 dysfunction.
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Affiliation(s)
- Mengjia Li
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001
| | - Donghao Liu
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001
| | - Fumin Xue
- Department of Gastroenterology, Children's Hospital affiliated to Zhengzhou University, Zhengzhou, China 450000
| | - Hengchao Zhang
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001
| | - Qianqian Yang
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001
| | - Lei Sun
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001
| | - Xiaoli Qu
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001
| | - Xiuyun Wu
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001
| | - Huizhi Zhao
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001
| | - Jing Liu
- Molecular Biology Research Center and Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, China 410078
| | - Qiaozhen Kang
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001
| | - Ting Wang
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001
| | - Xiuli An
- Laboratory of Membrane Biology, New York Blood Center, 310 East, 67th Street, New York, NY 10065.
| | - Lixiang Chen
- School of Life Sciences, Zhengzhou University, Science Road 100, Zhengzhou, China 450001.
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Ginzburg Y, An X, Rivella S, Goldfarb A. Normal and dysregulated crosstalk between iron metabolism and erythropoiesis. eLife 2023; 12:e90189. [PMID: 37578340 PMCID: PMC10425177 DOI: 10.7554/elife.90189] [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: 06/16/2023] [Accepted: 08/06/2023] [Indexed: 08/15/2023] Open
Abstract
Erythroblasts possess unique characteristics as they undergo differentiation from hematopoietic stem cells. During terminal erythropoiesis, these cells incorporate large amounts of iron in order to generate hemoglobin and ultimately undergo enucleation to become mature red blood cells, ultimately delivering oxygen in the circulation. Thus, erythropoiesis is a finely tuned, multifaceted process requiring numerous properly timed physiological events to maintain efficient production of 2 million red blood cells per second in steady state. Iron is required for normal functioning in all human cells, the erythropoietic compartment consuming the majority in light of the high iron requirements for hemoglobin synthesis. Recent evidence regarding the crosstalk between erythropoiesis and iron metabolism sheds light on the regulation of iron availability by erythroblasts and the consequences of insufficient as well as excess iron on erythroid lineage proliferation and differentiation. In addition, significant progress has been made in our understanding of dysregulated iron metabolism in various congenital and acquired malignant and non-malignant diseases. Finally, we report several actual as well as theoretical opportunities for translating the recently acquired robust mechanistic understanding of iron metabolism regulation to improve management of patients with disordered erythropoiesis, such as anemia of chronic inflammation, β-thalassemia, polycythemia vera, and myelodysplastic syndromes.
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Affiliation(s)
- Yelena Ginzburg
- Division of Hematology and Medical Oncology, The Tisch Cancer Institute, Icahn School of Medicine at Mount SinaiNew YorkUnited States
| | - Xiuli An
- LFKRI, New York Blood CenterNew YorkUnited States
| | - Stefano Rivella
- Department of Pediatrics, Division of Hematology, The Children’s Hospital of PhiladelphiaPhiladelphiaUnited States
- Cell and Molecular Biology affinity group (CAMB), University of PennsylvaniaPhiladelphiaUnited States
- Raymond G. Perelman Center for Cellular and Molecular Therapeutics at the Children’s Hospital of PhiladelphiaPhiladelphiaUnited States
- Penn Center for Musculoskeletal Disorders at the Children’s Hospital of PhiladelphiaPhiladelphiaUnited States
- Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Institute for Regenerative Medicine at University of PennsylvaniaPhiladelphiaUnited States
- RNA Institute at University of PennsylvaniaPhiladelphiaUnited States
| | - Adam Goldfarb
- Department of Pathology, University of VirginiaCharlottesvilleUnited States
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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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