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Song J, Zhang Y, Bai Y, Sun X, Lu Y, Guo Y, He Y, Gao M, Chi X, Heng BC, Zhang X, Li W, Xu M, Wei Y, You F, Zhang X, Lu D, Deng X. The Deubiquitinase OTUD1 Suppresses Secretory Neutrophil Polarization And Ameliorates Immunopathology of Periodontitis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303207. [PMID: 37639212 PMCID: PMC10602526 DOI: 10.1002/advs.202303207] [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] [Received: 05/18/2023] [Revised: 07/12/2023] [Indexed: 08/29/2023]
Abstract
Tissue-infiltrating neutrophils (TINs) secrete various signaling molecules to establish paracrine communication within the inflammatory milieu. It is imperative to identify molecular mediators that control this secretory phenotype of TINs. The present study uncovers a secretory neutrophil subset that exhibits increased pro-inflammatory cytokine production and enhanced migratory capacity which is highly related with periodontal pathogenesis. Further analysis identifies the OTU domain-containing protein 1 (OTUD1) plays a regulatory role in this secretory neutrophil polarization. In human and mouse periodontitis, the waning of inflammation is correlated with OTUD1 upregulation, whereas severe periodontitis is induced when neutrophil-intrinsic OTUD1 is depleted. Mechanistically, OTUD1 interacts with SEC23B, a component of the coat protein II complex (COPII). By removing the K63-linked polyubiquitin chains on SEC23B Lysine 81, the deubiquitinase OTUD1 negatively regulates the COPII secretory machinery and limits protein ER-to-Golgi trafficking, thus restricting the surface expression of integrin-regulated proteins, CD9 and CD47. Accordingly, blockade of protein transport by Brefeldin A (BFA) curbs recruitment of Otud1-deficient TINs and attenuates inflammation-induced alveolar bone destruction. The results thus identify OTUD1 signaling as a negative feedback loop that limits the polarization of neutrophils with secretory phenotype and highlight the potential application of BFA in the treatment of periodontal inflammation.
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Affiliation(s)
- Jia Song
- Department of Geriatric DentistryPeking University School and Hospital of StomatologyBeijing100081P. R. China
- Department of Dental Materials & Dental Medical Devices Testing CenterPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Yuning Zhang
- Department of OrthodonticsPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Yunyang Bai
- Department of Geriatric DentistryPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Xiaowen Sun
- Department of Dental Materials & Dental Medical Devices Testing CenterPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Yanhui Lu
- Department of Dental Materials & Dental Medical Devices Testing CenterPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Yusi Guo
- Department of Geriatric DentistryPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Ying He
- Department of Geriatric DentistryPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Min Gao
- Department of Geriatric DentistryPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Xiaopei Chi
- Department of Geriatric DentistryPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Boon Chin Heng
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
- Central LaboratoryPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Xin Zhang
- Institute of Systems BiomedicineSchool of Basic Medical SciencesNHC Key Laboratory of Medical ImmunologyBeijing Key Laboratory of Tumor Systems BiologyPeking University Health Science CenterBeijing100191P. R. China
| | - Wenjing Li
- Department of Geriatric DentistryPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Mingming Xu
- Department of Geriatric DentistryPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Yan Wei
- Department of Geriatric DentistryPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
| | - Fuping You
- Institute of Systems BiomedicineSchool of Basic Medical SciencesNHC Key Laboratory of Medical ImmunologyBeijing Key Laboratory of Tumor Systems BiologyPeking University Health Science CenterBeijing100191P. R. China
| | - Xuehui Zhang
- Department of Dental Materials & Dental Medical Devices Testing CenterPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
- Peking University‐Yunnan Baiyao International Medical Research CenterBeijing100191P. R. China
| | - Dan Lu
- Institute of Systems BiomedicineSchool of Basic Medical SciencesNHC Key Laboratory of Medical ImmunologyBeijing Key Laboratory of Tumor Systems BiologyPeking University Health Science CenterBeijing100191P. R. China
| | - Xuliang Deng
- Department of Geriatric DentistryPeking University School and Hospital of StomatologyBeijing100081P. R. China
- National Center for Stomatology National Clinical Research Center for Oral DiseasesNational Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPAKey Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital StomatologyPeking University School and Hospital of StomatologyBeijing100081P. R. China
- Peking University‐Yunnan Baiyao International Medical Research CenterBeijing100191P. R. China
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2
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Tang VT, Ginsburg D. Cargo selection in endoplasmic reticulum-to-Golgi transport and relevant diseases. J Clin Invest 2023; 133:163838. [PMID: 36594468 PMCID: PMC9797344 DOI: 10.1172/jci163838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Most proteins destined for the extracellular space or various intracellular compartments must traverse the intracellular secretory pathway. The first step is the recruitment and transport of cargoes from the endoplasmic reticulum (ER) lumen to the Golgi apparatus by coat protein complex II (COPII), consisting of five core proteins. Additional ER transmembrane proteins that aid cargo recruitment are referred to as cargo receptors. Gene duplication events have resulted in multiple COPII paralogs present in the mammalian genome. Here, we review the functions of each COPII protein, human disorders associated with each paralog, and evidence for functional conservation between paralogs. We also provide a summary of current knowledge regarding two prototypical cargo receptors in mammals, LMAN1 and SURF4, and their roles in human health and disease.
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Affiliation(s)
- Vi T. Tang
- Department of Molecular and Integrative Physiology,,Life Sciences Institute
| | - David Ginsburg
- Life Sciences Institute,,Department of Internal Medicine,,Department of Human Genetics,,Department of Pediatrics and Communicable Diseases, and,Howard Hughes Medical Institute, University of Michigan, Ann Arbor, Michigan, USA
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3
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Abstract
The World Health Organization estimates that approximately a quarter of the world's population suffers from anemia, including almost half of preschool-age children. Globally, iron deficiency anemia is the most common cause of anemia. Other important causes of anemia in children are hemoglobinopathies, infection, and other chronic diseases. Anemia is associated with increased morbidity, including neurologic complications, increased risk of low birth weight, infection, and heart failure, as well as increased mortality. When approaching a child with anemia, detailed historical information, particularly diet, environmental exposures, and family history, often yield important clues to the diagnosis. Dysmorphic features on physical examination may indicate syndromic causes of anemia. Diagnostic testing involves a stepwise approach utilizing various laboratory techniques. The increasing availability of genetic testing is providing new mechanistic insights into inherited anemias and allowing diagnosis in many previously undiagnosed cases. Population-based approaches are being taken to address nutritional anemias. Novel pharmacologic agents and advances in gene therapy-based therapeutics have the potential to ameliorate anemia-associated disease and provide treatment strategies even in the most difficult and complex cases.
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Affiliation(s)
- Patrick G Gallagher
- Departments of Pediatrics, Pathology, and Genetics, Yale University School of Medicine, New Haven, CT
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4
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Wei W, Liu Z, Zhang C, Khoriaty R, Zhu M, Zhang B. A common human missense mutation of vesicle coat protein SEC23B leads to growth restriction and chronic pancreatitis in mice. J Biol Chem 2021; 298:101536. [PMID: 34954140 PMCID: PMC8760524 DOI: 10.1016/j.jbc.2021.101536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/17/2021] [Accepted: 12/18/2021] [Indexed: 11/16/2022] Open
Affiliation(s)
- Wei Wei
- Genomic Medicine Institute, Lerner Research Institute of Cleveland Clinic, Cleveland, Ohio, USA
| | - Zhigang Liu
- Genomic Medicine Institute, Lerner Research Institute of Cleveland Clinic, Cleveland, Ohio, USA
| | - Chao Zhang
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rami Khoriaty
- Departments of Internal Medicine, Cell and Developmental Biology and Rogel Cancer Center, University of Michigan, Ann Arbor, Michigan, USA
| | - Min Zhu
- Department of Pathology, Xinjiang Key Laboratory of Clinical Genetic Testing and Biomedical Information, Karamay Central Hospital, Karamay, China.
| | - Bin Zhang
- Genomic Medicine Institute, Lerner Research Institute of Cleveland Clinic, Cleveland, Ohio, USA.
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Vesicular formation regulated by ERK/MAPK pathway mediates human erythroblast enucleation. Blood Adv 2021; 5:4648-4661. [PMID: 34551066 PMCID: PMC8759143 DOI: 10.1182/bloodadvances.2021004859] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 07/17/2021] [Indexed: 11/20/2022] Open
Abstract
ERK pathway plays a key role in enucleation of human orthochromatic erythroblasts. ERK regulates human erythroblast enucleation by affecting vesicular formation.
Enucleation is a key event in mammalian erythropoiesis responsible for the generation of enucleated reticulocytes. Although progress is being made in developing mechanistic understanding of enucleation, our understanding of mechanisms for enucleation is still incomplete. The MAPK pathway plays diverse roles in biological processes, but its role in erythropoiesis has yet to be fully defined. Analysis of RNA-sequencing data revealed that the MAPK pathway is significantly upregulated during human terminal erythroid differentiation. The MAPK pathway consists of 3 major signaling cassettes: MEK/ERK, p38, and JNK. In the present study, we show that among these 3 cassettes, only ERK was significantly upregulated in late-stage human erythroblasts. The increased expression of ERK along with its increased phosphorylation suggests a potential role for ERK activation in enucleation. To explore this hypothesis, we treated sorted populations of human orthochromatic erythroblasts with the MEK/ERK inhibitor U0126 and found that U0126 inhibited enucleation. In contrast, inhibitors of either p38 or JNK had no effect on enucleation. Mechanistically, U0126 selectively inhibited formation/accumulation of cytoplasmic vesicles and endocytosis of the transferrin receptor without affecting chromatin condensation, nuclear polarization, or enucleosome formation. Treatment with vacuolin-1 that induces vacuole formation partially rescued the blockage of enucleation by U0126. Moreover, phosphoproteomic analysis revealed that inactivation of the ERK pathway led to downregulation of the endocytic recycling pathway. Collectively, our findings uncovered a novel role of ERK activation in human erythroblast enucleation by modulating vesicle formation and have implications for understanding anemia associated with defective enucleation.
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6
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Scott C, Downes DJ, Brown JM, Beagrie R, Olijnik AA, Gosden M, Schwessinger R, Fisher CA, Rose A, Ferguson DJP, Johnson E, Hill QA, Okoli S, Renella R, Ryan K, Brand M, Hughes J, Roy NBA, Higgs DR, Babbs C, Buckle VJ. Recapitulation of erythropoiesis in congenital dyserythropoietic anaemia type I (CDA-I) identifies defects in differentiation and nucleolar abnormalities. Haematologica 2021; 106:2960-2970. [PMID: 33121234 PMCID: PMC8561284 DOI: 10.3324/haematol.2020.260158] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 09/17/2020] [Indexed: 11/19/2022] Open
Abstract
The investigation of inherited disorders of erythropoiesis has elucidated many of the principles underlying the production of normal red blood cells and how this is perturbed in human disease. Congenital Dyserythropoietic Anaemia type 1 (CDA-I) is a rare form of anaemia caused by mutations in two genes of unknown function: CDAN1 and CDIN1 (previously called C15orf41), whilst in some cases, the underlying genetic abnormality is completely unknown. Consequently, the pathways affected in CDA-I remain to be discovered. To enable detailed analysis of this rare disorder we have validated a culture system which recapitulates all of the cardinal haematological features of CDA-I, including the formation of the pathognomonic 'spongy' heterochromatin seen by electron microscopy. Using a variety of cell and molecular biological approaches we discovered that erythroid cells in this condition show a delay during terminal erythroid differentiation, associated with increased proliferation and widespread changes in chromatin accessibility. We also show that the proteins encoded by CDAN1 and CDIN1 are enriched in nucleoli which are structurally and functionally abnormal in CDA-I. Together these findings provide important pointers to the pathways affected in CDA-I which for the first time can now be pursued in the tractable culture system utilised here.
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Affiliation(s)
- Caroline Scott
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford.
| | - Damien J Downes
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford
| | - Jill M Brown
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford
| | - Robert Beagrie
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford
| | | | - Matthew Gosden
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford
| | - Ron Schwessinger
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford
| | | | - Anna Rose
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford
| | - David J P Ferguson
- Ultrastructural Morphology Group, NDCLS, John Radcliffe Hospital, Oxford
| | - Errin Johnson
- Sir William Dunn School of Pathology, Oxford University, Oxford
| | | | - Steven Okoli
- Imperial College, The Commonwealth Building, The Hammersmith Hospital, Du Cane Rd, London
| | - Raffaele Renella
- Pediatric Hematology-Oncology Research Laboratory, CHUV-UNIL Lausanne Switzerland
| | - Kate Ryan
- Department of Haematology, Manchester Royal Infirmary, Oxford Rd, Manchester
| | - Marjorie Brand
- Sprott Center for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa
| | - Jim Hughes
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford
| | - Noemi B A Roy
- Department of Haematology, Oxford University Hospitals NHS Trust, Churchill Hospital, Old Rd, Headington, and NIHR Biomedical Research Centre, Oxford
| | - Douglas R Higgs
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford
| | - Christian Babbs
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford
| | - Veronica J Buckle
- Weatherall Institute of Molecular Medicine, Oxford University, Oxford.
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7
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Using the Zebrafish as a Genetic Model to Study Erythropoiesis. Int J Mol Sci 2021; 22:ijms221910475. [PMID: 34638816 PMCID: PMC8508994 DOI: 10.3390/ijms221910475] [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: 08/13/2021] [Revised: 09/18/2021] [Accepted: 09/25/2021] [Indexed: 11/30/2022] Open
Abstract
Vertebrates generate mature red blood cells (RBCs) via a highly regulated, multistep process called erythropoiesis. Erythropoiesis involves synthesis of heme and hemoglobin, clearance of the nuclei and other organelles, and remodeling of the plasma membrane, and these processes are exquisitely coordinated by specific regulatory factors including transcriptional factors and signaling molecules. Defects in erythropoiesis can lead to blood disorders such as congenital dyserythropoietic anemias, Diamond–Blackfan anemias, sideroblastic anemias, myelodysplastic syndrome, and porphyria. The molecular mechanisms of erythropoiesis are highly conserved between fish and mammals, and the zebrafish (Danio rerio) has provided a powerful genetic model for studying erythropoiesis. Studies in zebrafish have yielded important insights into RBC development and established a number of models for human blood diseases. Here, we focus on latest discoveries of the molecular processes and mechanisms regulating zebrafish erythropoiesis and summarize newly established zebrafish models of human anemias.
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8
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McCaughey J, Stevenson NL, Mantell JM, Neal CR, Paterson A, Heesom K, Stephens DJ. A general role for TANGO1, encoded by MIA3, in secretory pathway organization and function. J Cell Sci 2021; 134:jcs259075. [PMID: 34350936 PMCID: PMC8524724 DOI: 10.1242/jcs.259075] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 07/09/2021] [Indexed: 11/25/2022] Open
Abstract
Complex machinery is required to drive secretory cargo export from the endoplasmic reticulum (ER), which is an essential process in eukaryotic cells. In vertebrates, the MIA3 gene encodes two major forms of transport and Golgi organization protein 1 (TANGO1S and TANGO1L), which have previously been implicated in selective trafficking of procollagen. Using genome engineering of human cells, light microscopy, secretion assays, genomics and proteomics, we show that disruption of the longer form, TANGO1L, results in relatively minor defects in secretory pathway organization and function, including having limited impacts on procollagen secretion. In contrast, loss of both long and short forms results in major defects in cell organization and secretion. These include a failure to maintain the localization of ERGIC53 (also known as LMAN1) and SURF4 to the ER-Golgi intermediate compartment and dramatic changes to the ultrastructure of the ER-Golgi interface. Disruption of TANGO1 causes significant changes in early secretory pathway gene and protein expression, and impairs secretion not only of large proteins, but of all types of secretory cargo, including small soluble proteins. Our data support a general role for MIA3/TANGO1 in maintaining secretory pathway structure and function in vertebrate cells.
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Affiliation(s)
- Janine McCaughey
- Cell Biology Laboratories,
School of Biochemistry, Faculty of Life Sciences, University Walk,
University of Bristol, Bristol, BS8 1TD,
UK
| | - Nicola L. Stevenson
- Cell Biology Laboratories,
School of Biochemistry, Faculty of Life Sciences, University Walk,
University of Bristol, Bristol, BS8 1TD,
UK
| | - Judith M. Mantell
- Wolfson Bioimaging Facility, Faculty of Life
Sciences, University Walk, University of
Bristol, Bristol, BS8 1TD,
UK
| | - Chris R. Neal
- Wolfson Bioimaging Facility, Faculty of Life
Sciences, University Walk, University of
Bristol, Bristol, BS8 1TD,
UK
| | | | - Kate Heesom
- Proteomics Facility, Faculty of Life
Sciences, University Walk, University of
Bristol, Bristol, BS8 1TD,
UK
| | - David J. Stephens
- Cell Biology Laboratories,
School of Biochemistry, Faculty of Life Sciences, University Walk,
University of Bristol, Bristol, BS8 1TD,
UK
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9
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Abstract
Congenital dyserythropoietic anemias (CDAs) are a heterogeneous group of inherited anemias that affect the normal differentiation-proliferation pathways of the erythroid lineage. They belong to the wide group of ineffective erythropoiesis conditions that mainly result in monolinear cytopenia. CDAs are classified into the 3 major types (I, II, III), plus the transcription factor-related CDAs, and the CDA variants, on the basis of the distinctive morphological, clinical, and genetic features. Next-generation sequencing has revolutionized the field of diagnosis of and research into CDAs, with reduced time to diagnosis, and ameliorated differential diagnosis in terms of identification of new causative/modifier genes and polygenic conditions. The main improvements regarding CDAs have been in the study of iron metabolism in CDAII. The erythroblast-derived hormone erythroferrone specifically inhibits hepcidin production, and its role in the mediation of hepatic iron overload has been dissected out. We discuss here the most recent advances in this field regarding the molecular genetics and pathogenic mechanisms of CDAs, through an analysis of the clinical and molecular classifications, and the complications and clinical management of patients. We summarize also the main cellular and animal models developed to date and the possible future therapies.
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10
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Cendrowski J, Kaczmarek M, Mazur M, Kuzmicz-Kowalska K, Jastrzebski K, Brewinska-Olchowik M, Kominek A, Piwocka K, Miaczynska M. Splicing variation of BMP2K balances abundance of COPII assemblies and autophagic degradation in erythroid cells. eLife 2020; 9:e58504. [PMID: 32795391 PMCID: PMC7473771 DOI: 10.7554/elife.58504] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 08/13/2020] [Indexed: 12/26/2022] Open
Abstract
Intracellular transport undergoes remodeling upon cell differentiation, which involves cell type-specific regulators. Bone morphogenetic protein 2-inducible kinase (BMP2K) has been potentially implicated in endocytosis and cell differentiation but its molecular functions remained unknown. We discovered that its longer (L) and shorter (S) splicing variants regulate erythroid differentiation in a manner unexplainable by their involvement in AP-2 adaptor phosphorylation and endocytosis. However, both variants interact with SEC16A and could localize to the juxtanuclear secretory compartment. Variant-specific depletion approach showed that BMP2K isoforms constitute a BMP2K-L/S regulatory system that controls the distribution of SEC16A and SEC24B as well as SEC31A abundance at COPII assemblies. Finally, we found L to promote and S to restrict autophagic degradation and erythroid differentiation. Hence, we propose that BMP2K-L and BMP2K-S differentially regulate abundance and distribution of COPII assemblies as well as autophagy, possibly thereby fine-tuning erythroid differentiation.
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Affiliation(s)
- Jaroslaw Cendrowski
- Laboratory of Cell Biology, International Institute of Molecular and Cell BiologyWarsawPoland
| | - Marta Kaczmarek
- Laboratory of Cell Biology, International Institute of Molecular and Cell BiologyWarsawPoland
| | - Michał Mazur
- Laboratory of Cell Biology, International Institute of Molecular and Cell BiologyWarsawPoland
| | | | - Kamil Jastrzebski
- Laboratory of Cell Biology, International Institute of Molecular and Cell BiologyWarsawPoland
| | | | - Agata Kominek
- Laboratory of Cytometry, Nencki Institute of Experimental BiologyWarsawPoland
| | - Katarzyna Piwocka
- Laboratory of Cytometry, Nencki Institute of Experimental BiologyWarsawPoland
| | - Marta Miaczynska
- Laboratory of Cell Biology, International Institute of Molecular and Cell BiologyWarsawPoland
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11
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McCaughey J, Stevenson NL, Cross S, Stephens DJ. ER-to-Golgi trafficking of procollagen in the absence of large carriers. J Cell Biol 2018; 218:929-948. [PMID: 30587510 PMCID: PMC6400576 DOI: 10.1083/jcb.201806035] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 10/17/2018] [Accepted: 12/06/2018] [Indexed: 01/28/2023] Open
Abstract
Trafficking of procollagen is essential for normal cell function. Here, imaging of GFP-tagged type I procollagen reveals that it is transported from the endoplasmic reticulum to the Golgi, without the use of large carriers. Secretion and assembly of collagen are fundamental to the function of the extracellular matrix. Defects in the assembly of a collagen matrix lead to pathologies including fibrosis and osteogenesis imperfecta. Owing to the size of fibril-forming procollagen molecules it is assumed that they are transported from the endoplasmic reticulum to the Golgi in specialized large COPII-dependent carriers. Here, analyzing endogenous procollagen and a new engineered GFP-tagged form, we show that transport to the Golgi occurs in the absence of large (>350 nm) carriers. Large GFP-positive structures were observed occasionally, but these were nondynamic, are not COPII positive, and are labeled with markers of the ER. We propose a short-loop model of COPII-dependent ER-to-Golgi traffic that, while consistent with models of ERGIC-dependent expansion of COPII carriers, does not invoke long-range trafficking of large vesicular structures. Our findings provide an important insight into the process of procollagen trafficking and reveal a short-loop pathway from the ER to the Golgi, without the use of large carriers.
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Affiliation(s)
- Janine McCaughey
- Cell Biology Laboratories, School of Biochemistry, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Nicola L Stevenson
- Cell Biology Laboratories, School of Biochemistry, Faculty of Life Sciences, University of Bristol, Bristol, UK
| | - Stephen Cross
- Wolfson Bioimaging Facility, Faculty of Biomedical Sciences, University of Bristol, Bristol, UK
| | - David J Stephens
- Cell Biology Laboratories, School of Biochemistry, Faculty of Life Sciences, University of Bristol, Bristol, UK
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12
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Qu X, Zhang S, Wang S, Wang Y, Li W, Huang Y, Zhao H, Wu X, An C, Guo X, Hale J, Li J, Hillyer CD, Mohandas N, Liu J, Yazdanbakhsh K, Vinchi F, Chen L, Kang Q, An X. TET2 deficiency leads to stem cell factor-dependent clonal expansion of dysfunctional erythroid progenitors. Blood 2018; 132:2406-2417. [PMID: 30254129 PMCID: PMC6265651 DOI: 10.1182/blood-2018-05-853291] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 09/14/2018] [Indexed: 12/12/2022] Open
Abstract
Myelodysplastic syndromes (MDSs) are clonal hematopoietic stem cell disorders characterized by ineffective hematopoiesis. Anemia is the defining cytopenia of MDS patients, yet the molecular mechanisms for dyserythropoiesis in MDSs remain to be fully defined. Recent studies have revealed that heterozygous loss-of-function mutation of DNA dioxygenase TET2 is 1 of the most common mutations in MDSs and that TET2 deficiency disturbs erythroid differentiation. However, mechanistic insights into the role of TET2 on disordered erythropoiesis are not fully defined. Here, we show that TET2 deficiency leads initially to stem cell factor (SCF)-dependent hyperproliferation and impaired differentiation of human colony-forming unit-erythroid (CFU-E) cells, which were reversed by a c-Kit inhibitor. We further show that this was due to increased phosphorylation of c-Kit accompanied by decreased expression of phosphatase SHP-1, a negative regulator of c-Kit. At later stages, TET2 deficiency led to an accumulation of a progenitor population, which expressed surface markers characteristic of normal CFU-E cells but were functionally different. In contrast to normal CFU-E cells that require only erythropoietin (EPO) for proliferation, these abnormal progenitors required SCF and EPO and exhibited impaired differentiation. We termed this population of progenitors "marker CFU-E" cells. We further show that AXL expression was increased in marker CFU-E cells and that the increased AXL expression led to increased activation of AKT and ERK. Moreover, the altered proliferation and differentiation of marker CFU-E cells were partially rescued by an AXL inhibitor. Our findings document an important role for TET2 in erythropoiesis and have uncovered previously unknown mechanisms by which deficiency of TET2 contributes to ineffective erythropoiesis.
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Affiliation(s)
- Xiaoli Qu
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
- Laboratory of Membrane Biology, New York Blood Center, New York, NY
| | - Shijie Zhang
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Shihui Wang
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Yaomei Wang
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
- Laboratory of Membrane Biology, New York Blood Center, New York, NY
| | - Wei Li
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
- Laboratory of Membrane Biology, New York Blood Center, New York, NY
- Department of Immunotherapy, The Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, China
| | - Yumin Huang
- Laboratory of Membrane Biology, New York Blood Center, New York, NY
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Huizhi Zhao
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Xiuyun Wu
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Chao An
- Laboratory of Membrane Biology, New York Blood Center, New York, NY
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xinhua Guo
- Laboratory of Membrane Biology, New York Blood Center, New York, NY
| | - John Hale
- Red Cell Physiology, New York Blood Center, New York, NY
| | - Jie Li
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
- Laboratory of Membrane Biology, New York Blood Center, New York, NY
| | | | - Narla Mohandas
- Red Cell Physiology, New York Blood Center, New York, NY
| | - Jing Liu
- The Province Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, China; and
| | | | | | - Lixiang Chen
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Qiaozhen Kang
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Xiuli An
- Erythrocyte Biology Laboratory, School of Life Sciences, Zhengzhou University, Zhengzhou, China
- Laboratory of Membrane Biology, New York Blood Center, New York, NY
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13
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Identification of a Novel Mutation in the SEC23B Gene Associated With Congenital Dyserythropoietic Anemia Type II Through the Use of Next-generation Sequencing Panel in an Undiagnosed Case of Nonimmune Hereditary Hemolytic Anemia. J Pediatr Hematol Oncol 2018; 40:e421-e423. [PMID: 29846281 DOI: 10.1097/mph.0000000000001207] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Congenital dyserythropoietic anemias (CDAs) are rare hereditary blood disorders characterized by ineffective erythropoiesis, hemolysis, and erythroblast morphologic abnormalities in the bone marrow. The 3 main types of CDA, I to III, and variant types of CDA, IV-VIII, have been described. The causative genes have been identified as CDAN1, C15ORF41, SEC23B, KIF23, KLF1, and GATA1. CDA type II is the most frequent form. Typical symptoms are jaundice, hepatosplenomegaly, mild-to-severe normocytic anemia, and inadequate reticulocyte response. We report an 18-year-old boy who had chronic mild congenital anemia, jaundice, and splenomegaly mimicking nonautoimmune hemolytic anemia since 18 months of age. Compound heterozygous mutations in SEC23B gene were detected by the use of a gene-targeted next-generation sequencing panel: the already reported missense mutation c.40C>T (p.Arg14Trp), and a new frameshift deletion (c.489_489delG, p.Val164Trpfs*3), confirming the diagnosis of CDA type II. The study underlines the molecular heterogeneity of CDA II and the importance of a precise diagnosis in rare congenital diseases such as CDA II. In consequence, it can be difficult to diagnose because of limited resources, financial constraint, and rarity of disease in the developing country. Advanced laboratories and new molecular approaches may help in diagnosing rare anemias.
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14
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McCaughey J, Stephens DJ. COPII-dependent ER export in animal cells: adaptation and control for diverse cargo. Histochem Cell Biol 2018; 150:119-131. [PMID: 29916038 PMCID: PMC6096569 DOI: 10.1007/s00418-018-1689-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/06/2018] [Indexed: 12/31/2022]
Abstract
The export of newly synthesized proteins from the endoplasmic reticulum is fundamental to the ongoing maintenance of cell and tissue structure and function. After co-translational translocation into the ER, proteins destined for downstream intracellular compartments or secretion from the cell are sorted and packaged into transport vesicles by the COPII coat protein complex. The fundamental discovery and characterization of the pathway has now been augmented by a greater understanding of the role of COPII in diverse aspects of cell function. We now have a deep understanding of how COPII contributes to the trafficking of diverse cargoes including extracellular matrix molecules, developmental signalling proteins, and key metabolic factors such as lipoproteins. Structural and functional studies have shown that the COPII coat is both highly flexible and subject to multiple modes of regulation. This has led to new discoveries defining roles of COPII in development, autophagy, and tissue organization. Many of these newly emerging features of the canonical COPII pathway are placed in a context of procollagen secretion because of the fundamental interest in how a coat complex that typically generates 80-nm transport vesicles can package a cargo reported to be over 300 nm. Here we review the current understanding of COPII and assess the current consensus on its role in packaging diverse cargo proteins.
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Affiliation(s)
- Janine McCaughey
- Cell Biology Laboratories, School of Biochemistry, University Walk, University of Bristol, Bristol, BS8 1TD, UK
| | - David J Stephens
- Cell Biology Laboratories, School of Biochemistry, University Walk, University of Bristol, Bristol, BS8 1TD, UK.
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15
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Moreno-Carralero MI, Horta-Herrera S, Morado-Arias M, Ricard-Andrés MP, Lemes-Castellano A, Abio-Calvete M, Cedena-Romero MT, González-Fernández FA, Llorente-González L, Periago-Peralta AM, de-la-Iglesia-Íñigo S, Méndez M, Morán-Jiménez MJ. Clinical and genetic features of congenital dyserythropoietic anemia (CDA). Eur J Haematol 2018; 101:368-378. [PMID: 29901818 DOI: 10.1111/ejh.13112] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2018] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Congenital dyserythropoietic anemias (CDA) are characterized by hyporegenerative anemia with inadequate reticulocyte values, ineffective erythropoiesis, and hemolysis. Distinctive morphology of bone marrow erythroblasts and identification of causative genes allow classification into 4 types caused by variants in CDAN1, c15orf41, SEC23B, KIF23, and KLF1 genes. OBJECTIVE Identify pathogenic variants in CDA patients. METHODS Massive parallel sequencing with a targeted gene panel, Sanger sequencing, Comparative Genome Hybridization (CGH), and in silico predictive analysis of pathogenicity. RESULTS Pathogenic variants were found in 21 of 53 patients studied from 44 unrelated families. Six variants were found in CDAN1: two reported, p.Arg714Trp and p.Arg725Trp and, four novel, p.Arg623Trp, p.Arg946Trp, p.Phe1125Ser and p.Ser1227Gly. Twelve variants were found in SEC23B: seven reported, p.Arg14Trp, p.Glu109Lys, p.Arg217Ter, c.835-2A>G, p.Arg535Ter, p.Arg550Ter and p.Arg718Ter and, five novel, p.Val164Leu, p.Arg190Gln, p.Gln521Ter, p.Arg546Trp, and p.Arg611Gln. The variant p.Glu325Lys in KLF1 was found in one patient and p.Tyr365Cys in ALAS2 in an other. Moreover, we identified genomic rearrangements by CGH in some SEC23B-monoallelic patients. CONCLUSIONS New technologies for genetic studies will help to find variants in other genes, in addition to those known, that contribute to or modulate the CDA phenotype or support the correct diagnosis.
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Affiliation(s)
| | | | - Marta Morado-Arias
- Servicio de Hematología y Hemoterapia, Hospital Universitario La Paz, Madrid, Spain
| | | | - Angelina Lemes-Castellano
- Servicio de Hematología y Hemoterapia, Hospital Universitario de Gran Canaria Doctor Negrín, Las Palmas de Gran Canaria, Gran Canaria, Spain
| | - Mariola Abio-Calvete
- Servicio de Hematología y Hemoterapia, Hospital Virgen de la Salud, Complejo Hospitalario de Toledo, Toledo, Spain
| | | | | | - Laura Llorente-González
- Servicio de Hematología y Hemoterapia, Hospital Universitario Puerta de Hierro, Majadahonda, Spain
| | | | - Silvia de-la-Iglesia-Íñigo
- Servicio de Hematología y Hemoterapia, Hospital Universitario de Gran Canaria Doctor Negrín, Las Palmas de Gran Canaria, Gran Canaria, Spain
| | - Manuel Méndez
- Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
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16
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Pellegrin S, Haydn-Smith KL, Hampton-O'Neil LA, Hawley BR, Heesom KJ, Fermo E, Bianchi P, Toye AM. Transduction with BBF2H7/CREB3L2 upregulates SEC23A protein in erythroblasts and partially corrects the hypo-glycosylation phenotype associated with CDAII. Br J Haematol 2018. [PMID: 29536501 PMCID: PMC6491999 DOI: 10.1111/bjh.15189] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Stéphanie Pellegrin
- School of Biochemistry, Biomedical Sciences Building, University Walk Bristol, Bristol, UK.,Bristol Institute of Transfusion Sciences, NHSBT Filton, Bristol, UK.,National Institute for Health Research (NIHR) Blood and Transplant Unit in Red Blood Cell Products at the University of Bristol, Bristol, UK
| | - Katy L Haydn-Smith
- School of Biochemistry, Biomedical Sciences Building, University Walk Bristol, Bristol, UK.,Bristol Institute of Transfusion Sciences, NHSBT Filton, Bristol, UK
| | - Lea A Hampton-O'Neil
- School of Biochemistry, Biomedical Sciences Building, University Walk Bristol, Bristol, UK.,National Institute for Health Research (NIHR) Blood and Transplant Unit in Red Blood Cell Products at the University of Bristol, Bristol, UK
| | - Bethan R Hawley
- School of Biochemistry, Biomedical Sciences Building, University Walk Bristol, Bristol, UK.,National Institute for Health Research (NIHR) Blood and Transplant Unit in Red Blood Cell Products at the University of Bristol, Bristol, UK
| | - Kate J Heesom
- School of Biochemistry, Biomedical Sciences Building, University Walk Bristol, Bristol, UK
| | - Elisa Fermo
- Haematology Unit, Physiopathology of Anaemia Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Paola Bianchi
- Haematology Unit, Physiopathology of Anaemia Unit, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Ashley M Toye
- School of Biochemistry, Biomedical Sciences Building, University Walk Bristol, Bristol, UK.,Bristol Institute of Transfusion Sciences, NHSBT Filton, Bristol, UK.,National Institute for Health Research (NIHR) Blood and Transplant Unit in Red Blood Cell Products at the University of Bristol, Bristol, UK
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17
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Mordue KE, Hawley BR, Satchwell TJ, Toye AM. CD47 surface stability is sensitive to actin disruption prior to inclusion within the band 3 macrocomplex. Sci Rep 2017; 7:2246. [PMID: 28533511 PMCID: PMC5440412 DOI: 10.1038/s41598-017-02356-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/10/2017] [Indexed: 02/04/2023] Open
Abstract
CD47 is an important 'marker of self' protein with multiple isoforms produced though alternative splicing that exhibit tissue-specific expression. Mature erythrocytes express CD47 isoform 2 only, with membrane stability of this version dependent on inclusion within the band 3 macrocomplex, via protein 4.2. At present a paucity of information exists regarding the associations and trafficking of the CD47 isoforms during erythropoiesis. We show that CD47 isoform 2 is the predominant version maintained at the surface of expanding and terminally differentiating erythroblasts. CD47 isoforms 3 and 4 are expressed in all cell types tested except mature erythrocytes, but do not reach the plasma membrane in erythroblasts and are degraded by the orthochromatic stage of differentiation. To identify putative CD47 interactants, immunoprecipitation combined with Nano LC-MS/MS mass spectrometry was conducted on the erythroleukaemic K562 cell line, expanding and terminally differentiating primary erythroblasts and mature erythrocytes. Results indicate that prior to incorporation into the band 3 macrocomplex, CD47 associates with actin-binding proteins and we confirm that CD47 membrane stability is sensitive to actin disrupting drugs. Maintenance of CD47 at the cell surface was also influenced by dynamin, with sensitivity to dynamin disruption prolonged relative to that of actin during erythropoiesis.
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Affiliation(s)
- Kathryn E Mordue
- School of Biochemistry, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, United Kingdom
- Bristol Institute of Transfusion Sciences, NHSBT, Filton, BS34 7QH, United Kingdom
| | - Bethan R Hawley
- School of Biochemistry, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, United Kingdom
- Bristol Institute of Transfusion Sciences, NHSBT, Filton, BS34 7QH, United Kingdom
- National Institute for Health Research (NIHR) Blood and Transplant Unit in Red Blood Cell Products at the University of Bristol, Bristol, BS8 1TD, United Kingdom
| | - Timothy J Satchwell
- School of Biochemistry, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, United Kingdom
- Bristol Institute of Transfusion Sciences, NHSBT, Filton, BS34 7QH, United Kingdom
- National Institute for Health Research (NIHR) Blood and Transplant Unit in Red Blood Cell Products at the University of Bristol, Bristol, BS8 1TD, United Kingdom
| | - Ashley M Toye
- School of Biochemistry, Biomedical Sciences Building, University Walk, Bristol, BS8 1TD, United Kingdom.
- Bristol Institute of Transfusion Sciences, NHSBT, Filton, BS34 7QH, United Kingdom.
- National Institute for Health Research (NIHR) Blood and Transplant Unit in Red Blood Cell Products at the University of Bristol, Bristol, BS8 1TD, United Kingdom.
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18
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Polyurethane scaffolds seeded with CD34(+) cells maintain early stem cells whilst also facilitating prolonged egress of haematopoietic progenitors. Sci Rep 2016; 6:32149. [PMID: 27573994 PMCID: PMC5004174 DOI: 10.1038/srep32149] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 08/03/2016] [Indexed: 12/15/2022] Open
Abstract
We describe a 3D erythroid culture system that utilises a porous polyurethane (PU) scaffold to mimic the compartmentalisation found in the bone marrow. PU scaffolds seeded with peripheral blood CD34+ cells exhibit a remarkable reproducibility of egress, with an increased output when directly compared to human bone scaffolds over 28 days. Immunofluorescence demonstrated the persistence of CD34+ cells within the scaffolds for the entirety of the culture. To characterise scaffold outputs, we designed a flow cytometry panel that utilises surface marker expression observed in standard 2D erythroid and megakaryocyte cultures. This showed that the egress population is comprised of haematopoietic progenitor cells (CD36+GPA−/low). Control cultures conducted in parallel but in the absence of a scaffold were also generally maintained for the longevity of the culture albeit with a higher level of cell death. The harvested scaffold egress can also be expanded and differentiated to the reticulocyte stage. In summary, PU scaffolds can behave as a subtractive compartmentalised culture system retaining and allowing maintenance of the seeded “CD34+ cell” population despite this population decreasing in amount as the culture progresses, whilst also facilitating egress of increasingly differentiated cells.
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19
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Increased levels of ERFE-encoding FAM132B in patients with congenital dyserythropoietic anemia type II. Blood 2016; 128:1899-1902. [PMID: 27540014 DOI: 10.1182/blood-2016-06-724328] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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20
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Bianchi P, Schwarz K, Högel J, Fermo E, Vercellati C, Grosse R, van Wijk R, van Zwieten R, Barcellini W, Zanella A, Heimpel H. Analysis of a cohort of 101 CDAII patients: description of 24 new molecular variants and genotype-phenotype correlations. Br J Haematol 2016; 175:696-704. [PMID: 27471141 DOI: 10.1111/bjh.14271] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 06/10/2016] [Indexed: 01/21/2023]
Abstract
Congenital dyserythropoietic anaemia type II (CDAII) is a rare autosomal recessive disease characterized by ineffective erythropoiesis, haemolysis, erythroblast morphological abnormalities, hypoglycosylation of some red blood cell membrane proteins, particularly band 3, and mutations in the SEC23B gene. We report the analysis of 101 patients from 91 families with a median follow-up of 23 years (range 0-65); 68 patients are newly reported. Clinical and haematological parameters were separately analysed in early infancy and thereafter, when feasible. Molecular analysis of the SEC23B gene confirmed the high heterogeneity of the defect, leading to the identification of 54 different mutations, 24 of which are newly described. To evaluate the genotype-phenotype correlation, patients were grouped according to their genotype (two missense mutations vs. one missense/one drastic mutation) and assigned to two different severity gradings based on laboratory data and on therapeutic needs; by this approach only a weak genotype-phenotype correlation was observed in the analysed groups.
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Affiliation(s)
- Paola Bianchi
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, UO Oncoematologia, UOS Fisiopatologia delle Anemie, Milan, Italy
| | - Klaus Schwarz
- Institute for Clinical Transfusion Medicine and Immunogenetics, German Red Cross Blood Service Baden-Wuerttemberg - Hessen and Institute for Transfusion Medicine, University of Ulm, Ulm, Germany
| | - Josef Högel
- Institute for Human Genetics, University Ulm, Ulm, Germany
| | - Elisa Fermo
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, UO Oncoematologia, UOS Fisiopatologia delle Anemie, Milan, Italy
| | - Cristina Vercellati
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, UO Oncoematologia, UOS Fisiopatologia delle Anemie, Milan, Italy
| | - Regine Grosse
- Klinik für Pädiatrische Hämatologie und Onkologie, Universität Hamburg, Hamburg, Germany
| | | | - Rob van Zwieten
- Laboratory of Red Blood Cell Diagnostics, Department of Blood Cell Research, Sanquin Blood Supply Foundation, Amsterdam, The Netherlands
| | - Wilma Barcellini
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, UO Oncoematologia, UOS Fisiopatologia delle Anemie, Milan, Italy
| | - Alberto Zanella
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, UO Oncoematologia, UOS Fisiopatologia delle Anemie, Milan, Italy
| | - Hermann Heimpel
- Department Internal Medicine III, University Hospital Ulm, Ulm, Germany
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21
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Khoriaty R, Everett L, Chase J, Zhu G, Hoenerhoff M, McKnight B, Vasievich MP, Zhang B, Tomberg K, Williams J, Maillard I, Ginsburg D. Pancreatic SEC23B deficiency is sufficient to explain the perinatal lethality of germline SEC23B deficiency in mice. Sci Rep 2016; 6:27802. [PMID: 27297878 PMCID: PMC4906273 DOI: 10.1038/srep27802] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 05/25/2016] [Indexed: 01/18/2023] Open
Abstract
In humans, loss of function mutations in SEC23B result in Congenital Dyserythropoietic Anemia type II (CDAII), a disease limited to defective erythroid development. Patients with two nonsense SEC23B mutations have not been reported, suggesting that complete SEC23B deficiency might be lethal. We previously reported that SEC23B-deficient mice die perinatally, exhibiting massive pancreatic degeneration and that mice with hematopoietic SEC23B deficiency do not exhibit CDAII. We now show that SEC23B deficiency restricted to the pancreas is sufficient to explain the lethality observed in mice with global SEC23B-deficiency. Immunohistochemical stains demonstrate an acinar cell defect but normal islet cells. Mammalian genomes contain two Sec23 paralogs, Sec23A and Sec23B. The encoded proteins share ~85% amino acid sequence identity. We generate mice with pancreatic SEC23A deficiency and demonstrate that these mice survive normally, exhibiting normal pancreatic weights and histology. Taken together, these data demonstrate that SEC23B but not SEC23A is essential for murine pancreatic development. We also demonstrate that two BAC transgenes spanning Sec23b rescue the lethality of mice homozygous for a Sec23b gene trap allele, excluding a passenger gene mutation as the cause of the pancreatic lethality, and indicating that the regulatory elements critical for Sec23b pancreatic function reside within the BAC transgenes.
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Affiliation(s)
- Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Lesley Everett
- University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jennifer Chase
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Guojing Zhu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Mark Hoenerhoff
- In Vivo Animal Core, Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Brooke McKnight
- College of Literature Science and the Arts, University of Michigan, Ann Arbor, MI, USA
| | | | - Bin Zhang
- Genomic Medicine Institute, Cleveland Clinic Lerner Research Institute, Cleveland, OH, USA
| | - Kärt Tomberg
- Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA
| | - John Williams
- Department of Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Ivan Maillard
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - David Ginsburg
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.,Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA.,Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI, USA.,Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI, USA
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22
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Ferguson DJP, Green CA, Ahmed M, King MJ. Peripheral marginalisation of endoplasmic reticulum membranes in cultured erythroblasts of congenital dyserythropoietic anaemia type II. J Clin Pathol 2016; 69:649-51. [PMID: 27010435 DOI: 10.1136/jclinpath-2016-203611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 03/08/2016] [Indexed: 11/03/2022]
Affiliation(s)
- D J P Ferguson
- Nuffield Department of Clinical Laboratory Science, University of Oxford, Oxford, UK
| | - C A Green
- Bristol Institution of Transfusion Science, NHS Blood and Transplant, Bristol, UK
| | - M Ahmed
- Department of Haematology, University College London Cancer Institute, London, UK
| | - M-J King
- International Blood Group Reference Laboratory, NHS Blood and Transplant, Bristol, UK
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23
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Gambale A, Iolascon A, Andolfo I, Russo R. Diagnosis and management of congenital dyserythropoietic anemias. Expert Rev Hematol 2016; 9:283-96. [PMID: 26653117 DOI: 10.1586/17474086.2016.1131608] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Congenital dyserythropoietic anemias (CDAs) are inherited disorders hallmarked by chronic hyporegenerative anemia, relative reticulocytopenia, hemolytic component and iron overload. They represent a subtype of the inherited bone marrow failure syndromes, characterized by impaired differentiation and proliferation of the erythroid lineage. Three classical types were defined by marrow morphology, even if the most recent classification recognized six different genetic types. The pathomechanisms of CDAs are different, but all seem to involve the regulation of DNA replication and cell division. CDAs are often misdiagnosed, since either morphological abnormalities or clinical features can be commonly identified in other clinically-related anemias. However, differential diagnosis is essential for guiding both follow up and management of the patients.
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Affiliation(s)
- Antonella Gambale
- a Dipartimento di Medicina Molecolare e Biotecnologie Mediche , Università degli Studi di Napoli Federico II , Napoli , Italy.,b CEINGE Biotecnologie Avanzate , Napoli , Italy
| | - Achille Iolascon
- a Dipartimento di Medicina Molecolare e Biotecnologie Mediche , Università degli Studi di Napoli Federico II , Napoli , Italy.,b CEINGE Biotecnologie Avanzate , Napoli , Italy
| | - Immacolata Andolfo
- a Dipartimento di Medicina Molecolare e Biotecnologie Mediche , Università degli Studi di Napoli Federico II , Napoli , Italy.,b CEINGE Biotecnologie Avanzate , Napoli , Italy
| | - Roberta Russo
- a Dipartimento di Medicina Molecolare e Biotecnologie Mediche , Università degli Studi di Napoli Federico II , Napoli , Italy.,b CEINGE Biotecnologie Avanzate , Napoli , Italy
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Liu J, Han X, An X. Novel methods for studying normal and disordered erythropoiesis. SCIENCE CHINA-LIFE SCIENCES 2015; 58:1270-5. [PMID: 26588913 DOI: 10.1007/s11427-015-4971-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 09/27/2015] [Indexed: 01/08/2023]
Abstract
Erythropoiesis is a process during which multipotential hematopoietic stem cells proliferate, differentiate and eventually form mature erythrocytes. Interestingly, unlike most cell types, an important feature of erythropoiesis is that following each mitosis the daughter cells are morphologically and functionally different from the parent cell from which they are derived, demonstrating the need to study erythropoiesis in a stage-specific manner. This has been impossible until recently due to lack of methods for isolating erythroid cells at each distinct developmental stage. This review summarizes recent advances in the development of methods for isolating both murine and human erythroid cells and their applications. These methods provide powerful means for studying normal and impaired erythropoiesis associated with hematological disorders.
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Affiliation(s)
- Jing Liu
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha, 410078, China
| | - Xu Han
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha, 410078, China
| | - XiuLi An
- College of Life Sciences, Zhengzhou University, Zhengzhou, 450001, China.
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Yehia L, Niazi F, Ni Y, Ngeow J, Sankunny M, Liu Z, Wei W, Mester J, Keri R, Zhang B, Eng C. Germline Heterozygous Variants in SEC23B Are Associated with Cowden Syndrome and Enriched in Apparently Sporadic Thyroid Cancer. Am J Hum Genet 2015; 97:661-76. [PMID: 26522472 DOI: 10.1016/j.ajhg.2015.10.001] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Accepted: 09/30/2015] [Indexed: 12/12/2022] Open
Abstract
Cancer-predisposing genes associated with inherited cancer syndromes help explain mechanisms of sporadic carcinogenesis and often inform normal development. Cowden syndrome (CS) is an autosomal-dominant disorder characterized by high lifetime risks of epithelial cancers, such that ∼50% of affected individuals are wild-type for known cancer-predisposing genes. Using whole-exome and Sanger sequencing of a multi-generation CS family affected by thyroid and other cancers, we identified a pathogenic missense heterozygous SEC23B variant (c.1781T>G [p.Val594Gly]) that segregates with the phenotype. We also found germline heterozygous SEC23B variants in 3/96 (3%) unrelated mutation-negative CS probands with thyroid cancer and in The Cancer Genome Atlas (TCGA), representing apparently sporadic cancers. We note that the TCGA thyroid cancer dataset is enriched with unique germline deleterious SEC23B variants associated with a significantly younger age of onset. SEC23B encodes Sec23 homolog B (S. cerevisiae), a component of coat protein complex II (COPII), which transports proteins from the endoplasmic reticulum (ER) to the Golgi apparatus. Interestingly, germline homozygous or compound-heterozygous SEC23B mutations cause an unrelated disorder, congenital dyserythropoietic anemia type II, and SEC23B-deficient mice suffer from secretory organ degeneration due to ER-stress-associated apoptosis. By characterizing the p.Val594Gly variant in a normal thyroid cell line, we show that it is a functional alteration that results in ER-stress-mediated cell-colony formation and survival, growth, and invasion, which reflect aspects of a cancer phenotype. Our findings suggest a different role for SEC23B, whereby germline heterozygous variants associate with cancer predisposition potentially mediated by ER stress "addiction."
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Neural tube opening and abnormal extraembryonic membrane development in SEC23A deficient mice. Sci Rep 2015; 5:15471. [PMID: 26494538 PMCID: PMC4616029 DOI: 10.1038/srep15471] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 09/23/2015] [Indexed: 01/14/2023] Open
Abstract
COPII (coat protein complex-II) vesicles transport proteins from the endoplasmic reticulum (ER) to the Golgi. Higher eukaryotes have two or more paralogs of most COPII components. Here we characterize mice deficient for SEC23A and studied interactions of Sec23a null allele with the previously reported Sec23b null allele. SEC23A deficiency leads to mid-embryonic lethality associated with defective development of extraembryonic membranes and neural tube opening in midbrain. Secretion defects of multiple collagen types are observed in different connective tissues, suggesting that collagens are primarily transported in SEC23A-containing vesicles in these cells. Other extracellular matrix proteins, such as fibronectin, are not affected by SEC23A deficiency. Intracellular accumulation of unsecreted proteins leads to strong induction of the unfolded protein response in collagen-producing cells. No collagen secretion defects are observed in SEC23B deficient embryos. We report that E-cadherin is a cargo that accumulates in acini of SEC23B deficient pancreas and salivary glands. Compensatory increase of one paralog is observed in the absence of the second paralog. Haploinsufficiency of the remaining Sec23 paralog on top of homozygous inactivation of the first paralog leads to earlier lethality of embryos. Our results suggest that mammalian SEC23A and SEC23B transport overlapping yet distinct spectra of cargo in vivo.
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Satchwell TJ, Bell AJ, Toye AM. The sorting of blood group active proteins during enucleation. ISBT SCIENCE SERIES 2015; 10:163-168. [PMID: 26640516 PMCID: PMC4668593 DOI: 10.1111/voxs.12127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Enucleation represents the critical stage during red blood cell development when the nucleus is extruded from an orthochromatic erythroblast in order to generate a nascent immature reticulocyte. Extrusion of the nucleus results in loss of a proportion of the erythroblast plasma membrane, which surrounds the nucleus, the bulk of the endoplasmic reticulum and a small region of cytoplasm. For this reason enucleation provides an important point in erythroblast differentiation at which proteins not required for the function of the erythrocyte can be lost, whilst those that are important for the structure-function properties of the mature erythrocyte must be efficiently retained in the reticulocyte plasma membrane. Disturbances in protein distribution during enucleation are envisaged to occur during human diseases such as Hereditary Spherocytosis. This article will discuss the current knowledge of erythroblast enucleation in the context of retention and loss of proteins that display antigenic blood group sites and that exist within multiprotein complexes within the erythrocyte membrane.
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Affiliation(s)
- Timothy J. Satchwell
- School of Biochemistry, Medical Sciences Building, University Walk, Bristol BS8 1TD
- Bristol Institute of Transfusion Sciences, NHS Blood and Transplant, Filton, Bristol
| | - Amanda J. Bell
- School of Biochemistry, Medical Sciences Building, University Walk, Bristol BS8 1TD
| | - Ashley M. Toye
- School of Biochemistry, Medical Sciences Building, University Walk, Bristol BS8 1TD
- Bristol Institute of Transfusion Sciences, NHS Blood and Transplant, Filton, Bristol
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Ulirsch JC, Lacy JN, An X, Mohandas N, Mikkelsen TS, Sankaran VG. Altered chromatin occupancy of master regulators underlies evolutionary divergence in the transcriptional landscape of erythroid differentiation. PLoS Genet 2014; 10:e1004890. [PMID: 25521328 PMCID: PMC4270484 DOI: 10.1371/journal.pgen.1004890] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 11/13/2014] [Indexed: 12/20/2022] Open
Abstract
Erythropoiesis is one of the best understood examples of cellular differentiation. Morphologically, erythroid differentiation proceeds in a nearly identical fashion between humans and mice, but recent evidence has shown that networks of gene expression governing this process are divergent between species. We undertook a systematic comparative analysis of six histone modifications and four transcriptional master regulators in primary proerythroblasts and erythroid cell lines to better understand the underlying basis of these transcriptional differences. Our analyses suggest that while chromatin structure across orthologous promoters is strongly conserved, subtle differences are associated with transcriptional divergence between species. Many transcription factor (TF) occupancy sites were poorly conserved across species (∼25% for GATA1, TAL1, and NFE2) but were more conserved between proerythroblasts and cell lines derived from the same species. We found that certain cis-regulatory modules co-occupied by GATA1, TAL1, and KLF1 are under strict evolutionary constraint and localize to genes necessary for erythroid cell identity. More generally, we show that conserved TF occupancy sites are indicative of active regulatory regions and strong gene expression that is sustained during maturation. Our results suggest that evolutionary turnover of TF binding sites associates with changes in the underlying chromatin structure, driving transcriptional divergence. We provide examples of how this framework can be applied to understand epigenomic variation in specific regulatory regions, such as the β-globin gene locus. Our findings have important implications for understanding epigenomic changes that mediate variation in cellular differentiation across species, while also providing a valuable resource for studies of hematopoiesis. The process whereby blood progenitor cells differentiate into red blood cells, known as erythropoiesis, is very similar between mice and humans. Yet, while studies of this process in mouse have substantially improved our knowledge of human erythropoiesis, recent work has shown a significant divergence in global gene expression across species, suggesting that extrapolation from mouse models to human is not always straightforward. In order to better understand these differences, we have performed a comparative epigenomic analysis of six histone modifications and four master transcription factors. By globally comparing chromatin structure across primary cells and model cell lines in both species, we discovered that while chromatin structure is well conserved at orthologous promoters, subtle changes are predictive of species-specific gene expression. Furthermore, we discovered that the genomic localizations of master transcription factors are poorly conserved, and species-specific losses or gains are associated with changes to the underlying chromatin structure and concomitant gene expression. By using our comparative epigenomics framework, we identified a putative human-specific cis-regulatory module that drives expression of human, but not mouse, GDF15, a gene implicated in iron homeostasis. Our results provide a resource to aid researchers in interpreting genetic and epigenetic differences between species.
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Affiliation(s)
- Jacob C. Ulirsch
- Division of Hematology/Oncology, The Manton Center for Orphan Disease Research, Boston Children's Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, United States of America
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
| | - Jessica N. Lacy
- Division of Hematology/Oncology, The Manton Center for Orphan Disease Research, Boston Children's Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, United States of America
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
| | - Xiuli An
- New York Blood Center, New York, New York, United States of America
| | - Narla Mohandas
- New York Blood Center, New York, New York, United States of America
| | - Tarjei S. Mikkelsen
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
- Harvard Stem Cell Institute, Cambridge, Massachusetts, United States of America
| | - Vijay G. Sankaran
- Division of Hematology/Oncology, The Manton Center for Orphan Disease Research, Boston Children's Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, United States of America
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
- * E-mail:
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Satchwell TJ, Hawley BR, Bell AJ, Ribeiro ML, Toye AM. The cytoskeletal binding domain of band 3 is required for multiprotein complex formation and retention during erythropoiesis. Haematologica 2014; 100:133-42. [PMID: 25344524 DOI: 10.3324/haematol.2014.114538] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Band 3 is the most abundant protein in the erythrocyte membrane and forms the core of a major multiprotein complex. The absence of band 3 in human erythrocytes has only been reported once, in the homozygous band 3 Coimbra patient. We used in vitro culture of erythroblasts derived from this patient, and separately short hairpin RNA-mediated depletion of band 3, to investigate the development of a band 3-deficient erythrocyte membrane and to specifically assess the stability and retention of band 3 dependent proteins in the absence of this core protein during terminal erythroid differentiation. Further, using lentiviral transduction of N-terminally green fluorescent protein-tagged band 3, we demonstrated the ability to restore expression of band 3 to normal levels and to rescue secondary deficiencies of key proteins including glycophorin A, protein 4.2, CD47 and Rh proteins arising from the absence of band 3 in this patient. By transducing band 3-deficient erythroblasts from this patient with band 3 mutants with absent or impaired ability to associate with the cytoskeleton we also demonstrated the importance of cytoskeletal connectivity for retention both of band 3 and of its associated dependent proteins within the reticulocyte membrane during the process of erythroblast enucleation.
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Affiliation(s)
- Timothy J Satchwell
- School of Biochemistry, Medical Sciences Building, University Walk, Bristol, UK Bristol Institute of Transfusion Sciences, NHSBT Filton, Bristol, UK
| | - Bethan R Hawley
- School of Biochemistry, Medical Sciences Building, University Walk, Bristol, UK Bristol Institute of Transfusion Sciences, NHSBT Filton, Bristol, UK
| | - Amanda J Bell
- School of Biochemistry, Medical Sciences Building, University Walk, Bristol, UK
| | - M Leticia Ribeiro
- Servico de Hematologia Clinica, Centro Hospitalar e Universitario de Coimbra, Portugal
| | - Ashley M Toye
- School of Biochemistry, Medical Sciences Building, University Walk, Bristol, UK Bristol Institute of Transfusion Sciences, NHSBT Filton, Bristol, UK
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Russo R, Gambale A, Langella C, Andolfo I, Unal S, Iolascon A. Retrospective cohort study of 205 cases with congenital dyserythropoietic anemia type II: definition of clinical and molecular spectrum and identification of new diagnostic scores. Am J Hematol 2014; 89:E169-75. [PMID: 25044164 DOI: 10.1002/ajh.23800] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 07/03/2014] [Indexed: 12/13/2022]
Abstract
Congenital Dyserythropoietic Anemia II (CDA II) is a rare hyporegenerative anemia of variable degree, whose causative gene is SEC23B. More than 60 causative mutations in 142 independent pedigrees have been described so far. However, the prevalence of the CDA II is probably underestimated, since its clinical spectrum was not yet well-defined and thus it is often misdiagnosed with more frequent clinically-related anemias. This study represents the first meta-analysis on clinical and molecular spectrum of CDA II from the largest cohort of cases ever described. We characterized 41 new cases and 18 mutations not yet associated to CDA II, thus expanding the global series to 205 cases (172 unrelated) and the total number of causative variants to 84. The 68.3% of patients are included in our International Registry of CDA II (Napoli, Italy). A genotype-phenotype correlation in three genotypic groups of patients was assessed. To quantify the degree of severity in each patient, a method based on ranking score was performed. We introduced a clinical index to easily discriminate patients with a well-compensated hemolytic anemia from those with ineffective erythropoiesis. Finally, the worldwide geographical distribution of SEC23B alleles highlighted the presence of multiple founder effects in different areas of the world.
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Affiliation(s)
- Roberta Russo
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche; Università degli Studi di Napoli Federico II; Napoli Italy
- CEINGE Biotecnologie Avanzate; Napoli Italy
| | - Antonella Gambale
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche; Università degli Studi di Napoli Federico II; Napoli Italy
- CEINGE Biotecnologie Avanzate; Napoli Italy
| | - Concetta Langella
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche; Università degli Studi di Napoli Federico II; Napoli Italy
- CEINGE Biotecnologie Avanzate; Napoli Italy
| | - Immacolata Andolfo
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche; Università degli Studi di Napoli Federico II; Napoli Italy
- CEINGE Biotecnologie Avanzate; Napoli Italy
| | - Sule Unal
- Division of Pediatric Hematology; Hacettepe University; Ankara Turkey
| | - Achille Iolascon
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche; Università degli Studi di Napoli Federico II; Napoli Italy
- CEINGE Biotecnologie Avanzate; Napoli Italy
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Grsf1-induced translation of the SNARE protein Use1 is required for expansion of the erythroid compartment. PLoS One 2014; 9:e104631. [PMID: 25184340 PMCID: PMC4153549 DOI: 10.1371/journal.pone.0104631] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 07/11/2014] [Indexed: 01/01/2023] Open
Abstract
Induction of cell proliferation requires a concomitant increase in the synthesis of glycosylated lipids and membrane proteins, which is dependent on ER-Golgi protein transport by CopII-coated vesicles. In this process, retrograde transport of ER resident proteins from the Golgi is crucial to maintain ER integrity, and allows for anterograde transport to continue. We previously showed that expression of the CopI specific SNARE protein Use1 (Unusual SNARE in the ER 1) is tightly regulated by eIF4E-dependent translation initiation of Use1 mRNA. Here we investigate the mechanism that controls Use1 mRNA translation. The 5'UTR of mouse Use1 contains a 156 nt alternatively spliced intron. The non-spliced form is the predominantly translated mRNA. The alternatively spliced sequence contains G-repeats that bind the RNA-binding protein G-rich sequence binding factor 1 (Grsf1) in RNA band shift assays. The presence of these G-repeats rendered translation of reporter constructs dependent on the Grsf1 concentration. Down regulation of either Grsf1 or Use1 abrogated expansion of erythroblasts. The 5'UTR of human Use1 lacks the splice donor site, but contains an additional upstream open reading frame in close proximity of the translation start site. Similar to mouse Use1, also the human 5'UTR contains G-repeats in front of the start codon. In conclusion, Grsf1 controls translation of the SNARE protein Use1, possibly by positioning the 40S ribosomal subunit and associated translation factors in front of the translation start site.
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Absence of a red blood cell phenotype in mice with hematopoietic deficiency of SEC23B. Mol Cell Biol 2014; 34:3721-34. [PMID: 25071156 DOI: 10.1128/mcb.00287-14] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Congenital dyserythropoietic anemia type II (CDAII) is an autosomal recessive disease of ineffective erythropoiesis characterized by increased bi/multinucleated erythroid precursors in the bone marrow. CDAII results from mutations in SEC23B. The SEC23 protein is a core component of coat protein complex II-coated vesicles, which transport secretory proteins from the endoplasmic reticulum to the Golgi apparatus. Though the genetic defect underlying CDAII has been identified, the pathophysiology of this disease remains unknown. We previously reported that SEC23B-deficient mice die perinatally, exhibiting massive pancreatic degeneration, with this early mortality limiting evaluation of the adult hematopoietic compartment. We now report that mice with SEC23B deficiency restricted to the hematopoietic compartment survive normally and do not exhibit anemia or other CDAII characteristics. We also demonstrate that SEC23B-deficient hematopoietic stem cells (HSC) do not exhibit a disadvantage at reconstituting hematopoiesis when compared directly to wild-type HSC in a competitive repopulation assay. Secondary bone marrow transplants demonstrated continued equivalence of SEC23B-deficient and WT HSC in their hematopoietic reconstitution potential. The surprising discordance in phenotypes between SEC23B-deficient mice and humans may reflect an evolutionary shift in SEC23 paralog function and/or expression, or a change in a specific COPII cargo critical for erythropoiesis.
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Transcriptional divergence and conservation of human and mouse erythropoiesis. Proc Natl Acad Sci U S A 2014; 111:4103-8. [PMID: 24591581 DOI: 10.1073/pnas.1401598111] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Mouse models have been used extensively for decades and have been instrumental in improving our understanding of mammalian erythropoiesis. Nonetheless, there are several examples of variation between human and mouse erythropoiesis. We performed a comparative global gene expression study using data from morphologically identical stage-matched sorted populations of human and mouse erythroid precursors from early to late erythroblasts. Induction and repression of major transcriptional regulators of erythropoiesis, as well as major erythroid-important proteins, are largely conserved between the species. In contrast, at a global level we identified a significant extent of divergence between the species, both at comparable stages and in the transitions between stages, especially for the 500 most highly expressed genes during development. This suggests that the response of multiple developmentally regulated genes to key erythroid transcriptional regulators represents an important modification that has occurred in the course of erythroid evolution. In developing a systematic framework to understand and study conservation and divergence between human and mouse erythropoiesis, we show how mouse models can fail to mimic specific human diseases and provide predictions for translating findings from mouse models to potential therapies for human disease.
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