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Li Y, Zhang H, Hu B, Wang P, Wang W, Liu J. Post-transcriptional regulation of erythropoiesis. BLOOD SCIENCE 2023; 5:150-159. [PMID: 37546708 PMCID: PMC10400058 DOI: 10.1097/bs9.0000000000000159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 04/11/2023] [Indexed: 08/08/2023] Open
Abstract
Erythropoiesis is a complex, precise, and lifelong process that is essential for maintaining normal body functions. Its strict regulation is necessary to prevent a variety of blood diseases. Normal erythropoiesis is precisely regulated by an intricate network that involves transcription levels, signal transduction, and various epigenetic modifications. In recent years, research on post-transcriptional levels in erythropoiesis has expanded significantly. The dynamic regulation of splicing transitions is responsible for changes in protein isoform expression that add new functions beneficial for erythropoiesis. RNA-binding proteins adapt the translation of transcripts to the protein requirements of the cell, yielding mRNA with dynamic translation efficiency. Noncoding RNAs, such as microRNAs and lncRNAs, are indispensable for changing the translational efficiency and/or stability of targeted mRNAs to maintain the normal expression of genes related to erythropoiesis. N6-methyladenosine-dependent regulation of mRNA translation plays an important role in maintaining the expression programs of erythroid-related genes and promoting erythroid lineage determination. This review aims to describe our current understanding of the role of post-transcriptional regulation in erythropoiesis and erythroid-associated diseases, and to shed light on the physiological and pathological implications of the post-transcriptional regulation machinery in erythropoiesis. These may help to further enrich our understanding of the regulatory network of erythropoiesis and provide new strategies for the diagnosis and treatment of erythroid-related diseases.
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Affiliation(s)
- Yanan Li
- Molecular Biology Research Center, Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, Hunan 410078, China
- Department of Imaging and Interventional Radiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Haihang Zhang
- Molecular Biology Research Center, Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, Hunan 410078, China
| | - Bin Hu
- Molecular Biology Research Center, Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, Hunan 410078, China
| | - Pan Wang
- Molecular Biology Research Center, Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, Hunan 410078, China
| | - Wei Wang
- Department of Imaging and Interventional Radiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Jing Liu
- Molecular Biology Research Center, Hunan Province Key Laboratory of Basic and Applied Hematology, School of Life Sciences, Central South University, Changsha, Hunan 410078, China
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U2AF1 and EZH2 mutations are associated with nonimmune hemolytic anemia in myelodysplastic syndromes. Blood Adv 2023; 7:1-8. [PMID: 36129843 DOI: 10.1182/bloodadvances.2022007504] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 08/10/2022] [Accepted: 09/05/2022] [Indexed: 01/18/2023] Open
Abstract
Hemolysis is a well-recognized but poorly characterized phenomenon in a subset of patients with myelodysplastic syndromes (MDS). Its pathobiological basis seems to underpin a nonimmune etiology whose clinical significance has not been adequately characterized. Hemolysis in MDS is often attributed to either ineffective intramedullary erythropoiesis or acquired hemoglobinopathies and red blood cell (RBC) membrane defects. These heterogeneous processes have not been associated with specific genetic subsets of the disease. We aimed to describe the prevalence of hemolysis among patients with MDS, their baseline characteristics, molecular features, and resulting impact on outcomes. We considered baseline serum haptoglobin <10 mg/dL a surrogate marker for intravascular hemolysis. Among 519 patients, 10% had hemolysis. The baseline characteristics were similar among both groups. Only 13% of patients with hemolysis were Coombs-positive, suggesting that hemolysis in MDS is largely not immune-mediated. Inferior survival trends were observed among lower-risk patients with MDS undergoing hemolysis. Decreased response rates to erythropoiesis-stimulating agents (ESA) and higher responses to hypomethylating agents (HMA) were also observed in the hemolysis group. U2AF1 and EZH2 hotspot mutations were more prevalent among those undergoing hemolysis (P < .05). U2AF1 mutations were observed in 30% of patients with hemolysis and occurred almost exclusively at the S34 hotspot. Somatic mutations encoding splicing factors may affect erythrocyte membrane components, biochemical properties, and RBC metabolic function, which underpin the development of atypical clones from erythroid precursors in MDS presenting with hemolysis. Future studies will explore the contribution of altered splicing to the development of acquired hemoglobinopathies.
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Luo P, Liu X, Tang Z, Xiong B. Decreased expression of HBA1 and HBB genes in acute myeloid leukemia patients and their inhibitory effects on growth of K562 cells. Hematology 2022; 27:1003-1009. [DOI: 10.1080/16078454.2022.2117186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Ping Luo
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, People’s Republic of China
| | - Xiaoyan Liu
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, People’s Republic of China
| | - Zehai Tang
- Department of Emergency, The Union Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, People’s Republic of China
| | - Bei Xiong
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, People’s Republic of China
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Peng Y, Tang L, Li Y, Song J, Liu H, Wang P, Zhong Z, Yang Y, Wang S, Chen L, Zhang J, Zhang S, Wang Z, Li M, Liang L, Liu J. Comprehensive proteomic analysis reveals dynamic phospho-profiling in human early erythropoiesis. Br J Haematol 2022; 199:427-442. [PMID: 35974424 DOI: 10.1111/bjh.18407] [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: 02/16/2022] [Revised: 07/25/2022] [Accepted: 08/03/2022] [Indexed: 12/01/2022]
Abstract
Normal early erythropoiesis depends on the precise regulation of protein expression and phosphorylation modification. Dysregulation of protein levels or modification contributes to erythroid disorders. To date, the dynamics of protein phosphorylation profiling across human erythroid development is not fully understood. Here, we characterized quantitative proteomic and phosphoproteomic profiling by tandem mass-tagging technology. We systemically built phospho-expression profiling and expression clusters of 11 414 phosphopeptides for human early erythropoiesis. The standardization methods for multitier integrative analyses revealed multiple functional modules of phosphoproteins (e.g., regulation of the G2/M transition) and active phosphorylated signalling (e.g., cell cycle-related pathways). Our further analysis revealed that CDK family members were the main kinases that phosphorylate substrates in erythroid progenitors and identified that CDK9 played an important role in the proliferation of erythroid progenitors. Collectively, our phosphoproteomic profiling, integrative network analysis and functional studies define landscapes of the phosphoproteome and reveal signalling pathways that are involved in human early erythropoiesis. This study will serve as a valuable resource for further investigations of phosphatase and kinase functions in human erythropoiesis and erythroid-related diseases.
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Affiliation(s)
- Yuanliang Peng
- Department of Hematology, The Second Xiangya Hospital of Central South University, Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences, Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha, China
| | - Li Tang
- School of Information Science and Engineering, Central South University, Changsha, China
| | - Yanan Li
- Department of Hematology, The Second Xiangya Hospital of Central South University, Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences, Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha, China
| | - Jianhui Song
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Hong Liu
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China
| | - Pan Wang
- Department of Hematology, The Second Xiangya Hospital of Central South University, Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences, Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha, China
| | - Zhizhou Zhong
- School of Information Science and Engineering, Central South University, Changsha, China
| | - Yifei Yang
- School of Information Science and Engineering, Central South University, Changsha, China
| | - Shihui Wang
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Lixiang Chen
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Ji Zhang
- Department of Clinical Laboratory, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Shijie Zhang
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Zi Wang
- Department of Hematology, The Second Xiangya Hospital of Central South University, Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences, Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha, China
| | - Min Li
- School of Information Science and Engineering, Central South University, Changsha, China
| | - Long Liang
- Department of Hematology, The Second Xiangya Hospital of Central South University, Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences, Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha, China
| | - Jing Liu
- Department of Hematology, The Second Xiangya Hospital of Central South University, Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences, Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha, China
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Wadugu BA, Nonavinkere Srivatsan S, Heard A, Alberti MO, Ndonwi M, Liu J, Grieb S, Bradley J, Shao J, Ahmed T, Shirai CL, Khanna A, Fei DL, Miller CA, Graubert TA, Walter MJ. U2af1 is a haplo-essential gene required for hematopoietic cancer cell survival in mice. J Clin Invest 2021; 131:141401. [PMID: 34546980 DOI: 10.1172/jci141401] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 09/16/2021] [Indexed: 11/17/2022] Open
Abstract
Somatic mutations in the spliceosome gene U2AF1 are common in patients with myelodysplastic syndromes. U2AF1 mutations that code for the most common amino acid substitutions are always heterozygous, and the retained WT allele is expressed, suggesting that mutant hematopoietic cells may require the residual WT allele to be viable. We show that hematopoiesis and RNA splicing in U2af1 heterozygous knockout mice were similar to those in control mice, but that deletion of the WT allele in U2AF1(S34F) heterozygous mutant-expressing hematopoietic cells (i.e., hemizygous mutant) was lethal. These results confirm that U2AF1 mutant hematopoietic cells are dependent on the expression of WT U2AF1 for survival in vivo and that U2AF1 is a haplo-essential cancer gene. Mutant U2AF1(S34F)-expressing cells were also more sensitive to reduced expression of WT U2AF1 than nonmutant cells. Furthermore, mice transplanted with leukemia cells expressing mutant U2AF1 had significantly reduced tumor burden and improved survival after the WT U2af1 allele was deleted compared with when it was not deleted. These results suggest that selectively targeting the WT U2AF1 allele in heterozygous mutant cells could induce cancer cell death and be a therapeutic strategy for patients harboring U2AF1 mutations.
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Affiliation(s)
| | | | - Amanda Heard
- Division of Oncology, Department of Medicine and
| | - Michael O Alberti
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, USA
| | | | - Jie Liu
- Division of Oncology, Department of Medicine and
| | - Sarah Grieb
- Division of Oncology, Department of Medicine and
| | | | - Jin Shao
- Division of Oncology, Department of Medicine and
| | - Tanzir Ahmed
- Division of Oncology, Department of Medicine and
| | | | - Ajay Khanna
- Division of Oncology, Department of Medicine and
| | - Dennis L Fei
- Department of Medicine, Meyer Cancer Center, Weill Cornell Medicine, New York, New York, USA.,Cancer Biology Section, Cancer Genetics Branch, National Human Genome Research Institute, Bethesda, Maryland, USA
| | | | - Timothy A Graubert
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, Massachusetts, USA
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Differential U2AF1 mutation sites, burden and co-mutation genes can predict prognosis in patients with myelodysplastic syndrome. Sci Rep 2020; 10:18622. [PMID: 33122737 PMCID: PMC7596495 DOI: 10.1038/s41598-020-74744-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 09/30/2020] [Indexed: 12/16/2022] Open
Abstract
To investigate the U2AF1 gene mutation site, mutation load and co-mutations genes in patients with myelodysplastic syndrome (MDS) and their effects on prognosis. Gene mutation detection by next-generation sequence and related clinical data of 234 MDS patients were retrospectively collected and analyzed for the relationship between the clinical characteristics, treatment efficacy and prognosis of U2AF1 gene mutation. Among the 234 MDS patients, the U2AF1 gene mutation rate was 21.7% (51 cases), and the median variant allele frequency was 39.5%. Compared with the wild type, the U2AF1 mutant had a higher incidence of chromosome 8 aberration, and was positively correlated with the occurrence of ASXL1, RUNX1, SETBP1 gene mutation, negatively correlated with SF3B1, NPM1 genes mutation (p < 0.05). The most common mutation site of U2AF1 was S34F (32 cases), while U2AF1 Q157P site mutations had a higher incidence of chromosome 7 abnormalities (p = 0.003). The U2AF1 gene mutation more frequently coincided with signal pathway related gene mutations (p = 0.043) with a trend of shortened overall survival. Among patients with U2AF1 gene mutations, those with ASXL1 mutations were prone to develop into acute myeloid leukemia, those with RUNX1 mutations had an increased risk of relapse, and those with TET2 mutations had higher 1-year survival rate. Compared with the patient group of lower mutation load (VAF ≤ 40%), the group with higher mutation load of U2AF1 (VAF > 40%) had a significantly lower 1-year survival rate (46.1% and 80.5%, p = 0.027). The criteria of U2AF1 VAF > 40% is an independent indicator for poor prognosis of MDS patients. VAF > 40% of U2AF1 is an independent factor of short OS in MDS patients. MDS patients with a mutation in the Q157P site of U2AF1 and a higher U2AF1 mutation load suggests poor prognosis, and co-mutated genes in U2AF1 can affect disease progression and prognosis.
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Zhang J, Zhao H, Wu K, Peng Y, Han X, Zhang H, Liang L, Chen H, Hu J, Qu X, Zhang S, Chen L, Liu J. Knockdown of spliceosome U2AF1 significantly inhibits the development of human erythroid cells. J Cell Mol Med 2019; 23:5076-5086. [PMID: 31144421 PMCID: PMC6652819 DOI: 10.1111/jcmm.14370] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 03/14/2019] [Accepted: 04/21/2019] [Indexed: 11/30/2022] Open
Abstract
U2AF1 (U2AF35) is the small subunit of the U2 auxiliary factor (U2AF) that constitutes the U2 snRNP (small nuclear ribonucleoproteins) of the spliceosome. Here, we examined the function of U2AF1 in human erythropoiesis. First, we examined the expression of U2AF1 during in vitro human erythropoiesis and showed that U2AF1 was highly expressed in the erythroid progenitor burst-forming-unit erythroid (BFU-E) cell stage. A colony assay revealed that U2AF1 knockdown cells failed to form BFU-E and colony-forming-unit erythroid (CFU-E) colonies. Our results further showed that knockdown of U2AF1 significantly inhibited cell growth and induced apoptosis in erythropoiesis. Additionally, knockdown of U2AF1 also delayed terminal erythroid differentiation. To explore the molecular basis of the impaired function of erythroid development, RNA-seq was performed and the Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis results showed that several biological pathways, including the p53 signalling pathway, MAPK signalling pathway and haematopoietic cell lineage, were involved, with the p53 signalling pathway showing the greatest involvement. Western blot analysis revealed an increase in the protein levels of downstream targets of p53 following U2AF1 knockdown. The data further showed that depletion of U2AF1 altered alternatively spliced apoptosis-associated gene transcripts in CFU-E cells. Our findings elucidate the role of U2AF1 in human erythropoiesis and reveal the underlying mechanisms.
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Affiliation(s)
- Jieying Zhang
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Huizhi Zhao
- School of Life Science, Zhengzhou University, Zhengzhou, China
| | - Kunlu Wu
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Yuanliang Peng
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Xu Han
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Huan Zhang
- School of Life Science, Zhengzhou University, Zhengzhou, China
| | - Long Liang
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Huiyong Chen
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Jingping Hu
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Xiaoli Qu
- School of Life Science, Zhengzhou University, Zhengzhou, China
| | - Shijie Zhang
- School of Life Science, Zhengzhou University, Zhengzhou, China
| | - Lixiang Chen
- School of Life Science, Zhengzhou University, Zhengzhou, China
| | - Jing Liu
- Molecular Biology Research Center & Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, China
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