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Vale M, Prochazka J, Sedlacek R. Towards a Cure for Diamond-Blackfan Anemia: Views on Gene Therapy. Cells 2024; 13:920. [PMID: 38891052 PMCID: PMC11172175 DOI: 10.3390/cells13110920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 05/17/2024] [Accepted: 05/23/2024] [Indexed: 06/20/2024] Open
Abstract
Diamond-Blackfan anemia (DBA) is a rare genetic disorder affecting the bone marrow's ability to produce red blood cells, leading to severe anemia and various physical abnormalities. Approximately 75% of DBA cases involve heterozygous mutations in ribosomal protein (RP) genes, classifying it as a ribosomopathy, with RPS19 being the most frequently mutated gene. Non-RP mutations, such as in GATA1, have also been identified. Current treatments include glucocorticosteroids, blood transfusions, and hematopoietic stem cell transplantation (HSCT), with HSCT being the only curative option, albeit with challenges like donor availability and immunological complications. Gene therapy, particularly using lentiviral vectors and CRISPR/Cas9 technology, emerges as a promising alternative. This review explores the potential of gene therapy, focusing on lentiviral vectors and CRISPR/Cas9 technology in combination with non-integrating lentiviral vectors, as a curative solution for DBA. It highlights the transformative advancements in the treatment landscape of DBA, offering hope for individuals affected by this condition.
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Affiliation(s)
- Matilde Vale
- Laboratory of Transgenic Models of Diseases, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i, 252 50 Vestec, Czech Republic; (M.V.); (J.P.)
| | - Jan Prochazka
- Laboratory of Transgenic Models of Diseases, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i, 252 50 Vestec, Czech Republic; (M.V.); (J.P.)
- Czech Centre for Phenogenomics, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i, 252 50 Vestec, Czech Republic
| | - Radislav Sedlacek
- Laboratory of Transgenic Models of Diseases, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i, 252 50 Vestec, Czech Republic; (M.V.); (J.P.)
- Czech Centre for Phenogenomics, Institute of Molecular Genetics of the Czech Academy of Sciences, v.v.i, 252 50 Vestec, Czech Republic
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Giménez Y, Palacios M, Sánchez-Domínguez R, Zorbas C, Peral J, Puzik A, Ugalde L, Alberquilla O, Villanueva M, Río P, Gálvez E, Da Costa L, Strullu M, Catala A, Ruiz-Llobet A, Segovia JC, Sevilla J, Strahm B, Niemeyer CM, Beléndez C, Leblanc T, Lafontaine DL, Bueren J, Navarro S. Lentivirus-mediated gene therapy corrects ribosomal biogenesis and shows promise for Diamond Blackfan anemia. JCI Insight 2024; 9:e171650. [PMID: 38775150 PMCID: PMC11141922 DOI: 10.1172/jci.insight.171650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 04/10/2024] [Indexed: 06/02/2024] Open
Abstract
This study lays the groundwork for future lentivirus-mediated gene therapy in patients with Diamond Blackfan anemia (DBA) caused by mutations in ribosomal protein S19 (RPS19), showing evidence of a new safe and effective therapy. The data show that, unlike patients with Fanconi anemia (FA), the hematopoietic stem cell (HSC) reservoir of patients with DBA was not significantly reduced, suggesting that collection of these cells should not constitute a remarkable restriction for DBA gene therapy. Subsequently, 2 clinically applicable lentiviral vectors were developed. In the former lentiviral vector, PGK.CoRPS19 LV, a codon-optimized version of RPS19 was driven by the phosphoglycerate kinase promoter (PGK) already used in different gene therapy trials, including FA gene therapy. In the latter one, EF1α.CoRPS19 LV, RPS19 expression was driven by the elongation factor alpha short promoter, EF1α(s). Preclinical experiments showed that transduction of DBA patient CD34+ cells with the PGK.CoRPS19 LV restored erythroid differentiation, and demonstrated the long-term repopulating properties of corrected DBA CD34+ cells, providing evidence of improved erythroid maturation. Concomitantly, long-term restoration of ribosomal biogenesis was verified using a potentially novel method applicable to patients' blood cells, based on ribosomal RNA methylation analyses. Finally, in vivo safety studies and proviral insertion site analyses showed that lentivirus-mediated gene therapy was nontoxic.
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Affiliation(s)
- Yari Giménez
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | - Manuel Palacios
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | - Rebeca Sánchez-Domínguez
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | - Christiane Zorbas
- RNA Molecular Biology, Fonds de la Recherche Scientifique (FRS/FNRS), Université libre de Bruxelles (ULB), Biopark campus, Gosselies, Belgium
| | - Jorge Peral
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | - Alexander Puzik
- Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Laura Ugalde
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | - Omaira Alberquilla
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | - Mariela Villanueva
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | - Paula Río
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | | | - Lydie Da Costa
- AP-HP, Hematology diagnostic laboratory, Hôpital Robert-Debré, Paris, France
- University of Paris; Hematim, UR4666, UPJV; LABEX GR-EX, Paris, France
| | - Marion Strullu
- AP-HP, service Immuno-Hématologie pédiatique, Hôpital R. Debré, Paris, France
| | | | | | - Jose Carlos Segovia
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | | | - Brigitte Strahm
- Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Charlotte M. Niemeyer
- Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Cristina Beléndez
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Sección de Hematología y Oncología Pediátricas, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Thierry Leblanc
- AP-HP, service Immuno-Hématologie pédiatique, Hôpital R. Debré, Paris, France
| | - Denis L.J. Lafontaine
- RNA Molecular Biology, Fonds de la Recherche Scientifique (FRS/FNRS), Université libre de Bruxelles (ULB), Biopark campus, Gosselies, Belgium
| | - Juan Bueren
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
| | - Susana Navarro
- Division of Hematopoietic Innovative Therapies, CIEMAT, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Advanced Therapies Unit, IIS-Fundación Jimenez Diaz (IIS-FJD, UAM), Madrid, Spain
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Bhoopalan SV, Suryaprakash S, Sharma A, Wlodarski MW. Hematopoietic cell transplantation and gene therapy for Diamond-Blackfan anemia: state of the art and science. Front Oncol 2023; 13:1236038. [PMID: 37752993 PMCID: PMC10518466 DOI: 10.3389/fonc.2023.1236038] [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: 06/07/2023] [Accepted: 08/25/2023] [Indexed: 09/28/2023] Open
Abstract
Diamond-Blackfan anemia (DBA) is one of the most common inherited causes of bone marrow failure in children. DBA typically presents with isolated erythroid hypoplasia and anemia in infants. Congenital anomalies are seen in 50% of the patients. Over time, many patients experience panhematopoietic defects resulting in immunodeficiency and multilineage hematopoietic cytopenias. Additionally, DBA is associated with increased risk of myelodysplastic syndrome, acute myeloid leukemia and solid organ cancers. As a prototypical ribosomopathy, DBA is caused by heterozygous loss-of-function mutations or deletions in over 20 ribosomal protein genes, with RPS19 being involved in 25% of patients. Corticosteroids are the only effective initial pharmacotherapy offered to transfusion-dependent patients aged 1 year or older. However, despite good initial response, only ~20-30% remain steroid-responsive while the majority of the remaining patients will require life-long red blood cell transfusions. Despite continuous chelation, iron overload and related toxicities pose a significant morbidity problem. Allogeneic hematopoietic cell transplantation (HCT) performed to completely replace the dysfunctional hematopoietic stem and progenitor cells is a curative option associated with potentially uncontrollable risks. Advances in HLA-typing, conditioning regimens, infection management, and graft-versus-host-disease prophylaxis have led to improved transplant outcomes in DBA patients, though survival is suboptimal for adolescents and adults with long transfusion-history and patients lacking well-matched donors. Additionally, many patients lack a suitable donor. To address this gap and to mitigate the risk of graft-versus-host disease, several groups are working towards developing autologous genetic therapies to provide another curative option for DBA patients across the whole age spectrum. In this review, we summarize the results of HCT studies and review advances and potential future directions in hematopoietic stem cell-based therapies for DBA.
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Affiliation(s)
- Senthil Velan Bhoopalan
- Department of Hematology, St. Jude Children’s Research Hospital, Memphis, TN, United States
- Department of Bone Marrow Transplantation and Cellular Therapy, St. Jude Children’s Research Hospital, Memphis, TN, United States
| | - Shruthi Suryaprakash
- Department of Oncology, St. Jude Children’s Research Hospital, Memphis, TN, United States
| | - Akshay Sharma
- Department of Bone Marrow Transplantation and Cellular Therapy, St. Jude Children’s Research Hospital, Memphis, TN, United States
| | - Marcin W. Wlodarski
- Department of Hematology, St. Jude Children’s Research Hospital, Memphis, TN, United States
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Bhoopalan SV, Yen JS, Mayuranathan T, Mayberry KD, Yao Y, Lillo Osuna MA, Jang Y, Liyanage JS, Blanc L, Ellis SR, Wlodarski MW, Weiss MJ. An RPS19-edited model for Diamond-Blackfan anemia reveals TP53-dependent impairment of hematopoietic stem cell activity. JCI Insight 2023; 8:e161810. [PMID: 36413407 PMCID: PMC9870085 DOI: 10.1172/jci.insight.161810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 11/16/2022] [Indexed: 11/24/2022] Open
Abstract
Diamond-Blackfan anemia (DBA) is a genetic blood disease caused by heterozygous loss-of-function mutations in ribosomal protein (RP) genes, most commonly RPS19. The signature feature of DBA is hypoplastic anemia occurring in infants, although some older patients develop multilineage cytopenias with bone marrow hypocellularity. The mechanism of anemia in DBA is not fully understood and even less is known about the pancytopenia that occurs later in life, in part because patient hematopoietic stem and progenitor cells (HSPCs) are difficult to obtain, and the current experimental models are suboptimal. We modeled DBA by editing healthy human donor CD34+ HSPCs with CRISPR/Cas9 to create RPS19 haploinsufficiency. In vitro differentiation revealed normal myelopoiesis and impaired erythropoiesis, as observed in DBA. After transplantation into immunodeficient mice, bone marrow repopulation by RPS19+/- HSPCs was profoundly reduced, indicating hematopoietic stem cell (HSC) impairment. The erythroid and HSC defects resulting from RPS19 haploinsufficiency were partially corrected by transduction with an RPS19-expressing lentiviral vector or by Cas9 disruption of TP53. Our results define a tractable, biologically relevant experimental model of DBA based on genome editing of primary human HSPCs and they identify an associated HSC defect that emulates the pan-hematopoietic defect of DBA.
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Affiliation(s)
| | | | | | | | - Yu Yao
- Department of Hematology, and
| | | | | | - Janaka S.S. Liyanage
- Department of Biostatistics, St. Jude Children’s Research Hospital, Memphis, Tennessee, USA
| | - Lionel Blanc
- Institute of Molecular Medicine, Feinstein Institutes for Medical Research, Manhasset, New York, USA
| | - Steven R. Ellis
- Department of Biochemistry and Molecular Genetics, University of Louisville, Louisville, Kentucky, USA
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Piantanida N, La Vecchia M, Sculco M, Talmon M, Palattella G, Kurita R, Nakamura Y, Ronchi AE, Dianzani I, Ellis SR, Fresu LG, Aspesi A. Deficiency of ribosomal protein S26, which is mutated in a subset of patients with Diamond Blackfan anemia, impairs erythroid differentiation. Front Genet 2022; 13:1045236. [PMID: 36579335 PMCID: PMC9790993 DOI: 10.3389/fgene.2022.1045236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/01/2022] [Indexed: 12/14/2022] Open
Abstract
Introduction: Diamond Blackfan anemia (DBA) is a rare congenital disease characterized by defective maturation of the erythroid progenitors in the bone marrow, for which treatment involves steroids, chronic transfusions, or hematopoietic stem cells transplantation. Diamond Blackfan anemia is caused by defective ribosome biogenesis due to heterozygous pathogenic variants in one of 19 ribosomal protein (RP) genes. The decreased number of functional ribosomes leads to the activation of pro-apoptotic pathways and to the reduced translation of key genes for erythropoiesis. Results and discussion: Here we characterized the phenotype of RPS26-deficiency in a cell line derived from human umbilical cord blood erythroid progenitors (HUDEP-1 cells). This model recapitulates cellular hallmarks of Diamond Blackfan anemia including: imbalanced production of ribosomal RNAs, upregulation of pro-apoptotic genes and reduced viability, and shows increased levels of intracellular calcium. Evaluation of the expression of erythroid markers revealed the impairment of erythroid differentiation in RPS26-silenced cells compared to control cells. Conclusions: In conclusion, for the first time we assessed the effect of RPS26 deficiency in a human erythroid progenitor cell line and demonstrated that these cells can be used as a scalable model system to study aspects of DBA pathophysiology that have been refractory to detailed investigation because of the paucity of specific cell types affected in this disorder.
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Affiliation(s)
- Noemy Piantanida
- Department of Health Sciences, Università Del Piemonte Orientale, Novara, Italy
| | - Marta La Vecchia
- Department of Health Sciences, Università Del Piemonte Orientale, Novara, Italy
| | - Marika Sculco
- Department of Health Sciences, Università Del Piemonte Orientale, Novara, Italy
| | - Maria Talmon
- Department of Health Sciences, Università Del Piemonte Orientale, Novara, Italy
| | - Gioele Palattella
- Department of Health Sciences, Università Del Piemonte Orientale, Novara, Italy
| | - Ryo Kurita
- Department of Research and Development, Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, Tokyo, Japan
| | - Yukio Nakamura
- Cell Engineering Division, RIKEN BioResource Research Center, Tsukuba, Japan
| | | | - Irma Dianzani
- Department of Health Sciences, Università Del Piemonte Orientale, Novara, Italy
| | - Steven R. Ellis
- Department of Biochemistry and Molecular Genetics, University of Louisville, Louisville, KY, United States
| | - Luigia Grazia Fresu
- Department of Health Sciences, Università Del Piemonte Orientale, Novara, Italy
| | - Anna Aspesi
- Department of Health Sciences, Università Del Piemonte Orientale, Novara, Italy,*Correspondence: Anna Aspesi,
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Aspesi A, Borsotti C, Follenzi A. Emerging Therapeutic Approaches for Diamond Blackfan Anemia. Curr Gene Ther 2019; 18:327-335. [PMID: 30411682 PMCID: PMC6637096 DOI: 10.2174/1566523218666181109124538] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 11/02/2018] [Accepted: 11/09/2018] [Indexed: 01/05/2023]
Abstract
Diamond Blackfan Anemia (DBA) is an inherited erythroid aplasia with onset in childhood. Patients carry heterozygous mutations in one of 19 Ribosomal Protein (RP) genes, that lead to defective ribosome biogenesis and function. Standard treatments include steroids or blood transfusions but the only definitive cure is allogeneic Hematopoietic Stem Cell Transplantation (HSCT). Although advances in HSCT have greatly improved the success rate over the last years, the risk of adverse events and mor-tality is still significant. Clinical trials employing gene therapy are now in progress for a variety of monogenic diseases and the development of innovative stem cell-based strategies may open new alternatives for DBA treatment as well. In this review, we summarize the most recent progress toward the implementation of new thera-peutic approaches for this disorder. We present different DNA- and RNA-based technologies as well as new candidate pharmacological treatments and discuss their relevance and potential applicability for the cure of DBA.
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Affiliation(s)
- Anna Aspesi
- Department of Health Sciences, University of Eastern Piedmont Amedeo Avogadro, Novara, Italy
| | - Chiara Borsotti
- Department of Health Sciences, University of Eastern Piedmont Amedeo Avogadro, Novara, Italy
| | - Antonia Follenzi
- Department of Health Sciences, University of Eastern Piedmont Amedeo Avogadro, Novara, Italy
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Bueren JA, Quintana-Bustamante O, Almarza E, Navarro S, Río P, Segovia JC, Guenechea G. Advances in the gene therapy of monogenic blood cell diseases. Clin Genet 2019; 97:89-102. [PMID: 31231794 DOI: 10.1111/cge.13593] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 05/12/2019] [Accepted: 05/21/2019] [Indexed: 01/19/2023]
Abstract
Hematopoietic gene therapy has markedly progressed during the last 15 years both in terms of safety and efficacy. While a number of serious adverse events (SAE) were initially generated as a consequence of genotoxic insertions of gamma-retroviral vectors in the cell genome, no SAEs and excellent outcomes have been reported in patients infused with autologous hematopoietic stem cells (HSCs) transduced with self-inactivated lentiviral and gammaretroviral vectors. Advances in the field of HSC gene therapy have extended the number of monogenic diseases that can be treated with these approaches. Nowadays, evidence of clinical efficacy has been shown not only in primary immunodeficiencies, but also in other hematopoietic diseases, including beta-thalassemia and sickle cell anemia. In addition to the rapid progression of non-targeted gene therapies in the clinic, new approaches based on gene editing have been developed thanks to the discovery of designed nucleases and improved non-integrative vectors, which have markedly increased the efficacy and specificity of gene targeting to levels compatible with its clinical application. Based on advances achieved in the field of gene therapy, it can be envisaged that these therapies will soon be part of the therapeutic approaches used to treat life-threatening diseases of the hematopoietic system.
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Affiliation(s)
- Juan A Bueren
- Division of Hematopoietic Innovative Therapies, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Investigaciones Sanitarias Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - Oscar Quintana-Bustamante
- Division of Hematopoietic Innovative Therapies, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Investigaciones Sanitarias Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - Elena Almarza
- Division of Hematopoietic Innovative Therapies, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Investigaciones Sanitarias Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - Susana Navarro
- Division of Hematopoietic Innovative Therapies, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Investigaciones Sanitarias Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - Paula Río
- Division of Hematopoietic Innovative Therapies, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Investigaciones Sanitarias Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - José C Segovia
- Division of Hematopoietic Innovative Therapies, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Investigaciones Sanitarias Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - Guillermo Guenechea
- Division of Hematopoietic Innovative Therapies, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Investigaciones Sanitarias Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
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8
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Yao B, Zhang M, Leng X, Zhao D. Proteomic analysis of the effects of antler extract on chondrocyte proliferation, differentiation and apoptosis. Mol Biol Rep 2019; 46:1635-1648. [DOI: 10.1007/s11033-019-04612-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 01/17/2019] [Indexed: 01/09/2023]
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The Chinese Medicinal Formulation Guzhi Zengsheng Zhitongwan Modulates Chondrocyte Structure, Dynamics, and Metabolism by Controlling Multiple Functional Proteins. BIOMED RESEARCH INTERNATIONAL 2019; 2018:9847286. [PMID: 30596102 PMCID: PMC6282133 DOI: 10.1155/2018/9847286] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 11/08/2018] [Indexed: 12/15/2022]
Abstract
Traditional Chinese medicine is one of the oldest medical systems in the world and has its unique principles and theories in the prevention and treatment of human diseases, which are achieved through the interactions of different types of materia medica in the form of Chinese medicinal formulations. GZZSZTW, a classical and effective Chinese medicinal formulation, was designed and created by professor Bailing Liu who is the only national medical master professor in the clinical research field of traditional Chinese medicine and skeletal diseases. GZZSZTW has been widely used in clinical settings for several decades for the treatment of joint diseases. However, the underlying molecular mechanisms are still largely unknown. In the present study, we performed quantitative proteomic analysis to investigate the effects of GZZSZTW on mouse primary chondrocytes using state-of-the-art iTRAQ technology. We demonstrated that the Chinese medicinal formulation GZZSZTW modulates chondrocyte structure, dynamics, and metabolism by controlling multiple functional proteins that are involved in the cellular processes of DNA replication and transcription, protein synthesis and degradation, cytoskeleton dynamics, and signal transduction. Thus, this study has expanded the current knowledge of the molecular mechanism of GZZSZTW treatment on chondrocytes. It has also shed new light on possible strategies to further prevent and treat cartilage-related diseases using traditional Chinese medicinal formulations.
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Khan A, Ali A, Junaid M, Liu C, Kaushik AC, Cho WCS, Wei DQ. Identification of novel drug targets for diamond-blackfan anemia based on RPS19 gene mutation using protein-protein interaction network. BMC SYSTEMS BIOLOGY 2018; 12:39. [PMID: 29745857 PMCID: PMC5998885 DOI: 10.1186/s12918-018-0563-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND Diamond-Blackfan anemia (DBA) is a congenital erythroid aplasia that usually presents in infancy. In order to explore the molecular mechanisms of wild and mutated samples from DBA patients were exposed to bioinformatics investigation. Biological network of differentially expressed genes was constructed. This study aimed to identify novel therapeutic signatures in DBA and uncovered their mechanisms. The gene expression dataset of GSE14335 was used, which consists of 6 normal and 4 diseased cases. The gene ontology (GO), as well as Kyoto Encyclopaedia of Genes and Genomes (KEGG) pathway enrichment analyses were performed, and then protein-protein interaction (PPI) network of the identified differentially expressed genes (DEGs) was constructed by Cytoscape software. RESULTS A total of 607 DEGs were identified in DBA, including 433 upregulated genes and 174 downregulated genes. GO analysis results showed that upregulated DEGs were significantly enriched in biological processes, negative regulation of transcription from RNA polymerase II promoter, chemotaxis, inflammatory response, immune response, positive regulation of cell proliferation, negative regulation of cell proliferation, response to mechanical stimulus, positive regulation of cell migration, response to lipopolysaccharide, and defence response. KEGG pathway analysis revealed the TNF signalling pathway, Osteoclast differentiation, Chemokine signalling pathway, Cytokine -cytokine receptor interaction, Rheumatoid arthritis, Biosynthesis of amino acids, Biosynthesis of antibiotics and Glycine, serine and threonine metabolism. The top 10 hub genes, AKT1, IL6, NFKB1, STAT3, STAT1, RAC1, EGR1, IL8, RELA, RAC3, mTOR and CCR2 were identified from the PPI network and sub-networks. CONCLUSION The present study flagged that the identified DEGs and hub genes enrich our understanding of the molecular mechanisms underlying the development of DBA, and might shine some lights on identifying molecular targets and diagnostic biomarkers for DBA.
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Affiliation(s)
- Abbas Khan
- Department of Bioinformatics and Biostatistics, College of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - Arif Ali
- Department of Bioinformatics and Biostatistics, College of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - Muhammad Junaid
- Department of Bioinformatics and Biostatistics, College of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - Chang Liu
- Department of Bioinformatics and Biostatistics, College of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - Aman Chandra Kaushik
- Department of Bioinformatics and Biostatistics, College of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - William C. S. Cho
- Department of Clinical Oncology, Queen Elizabeth Hospital, Kowloon, Hong Kong
| | - Dong-Qing Wei
- Department of Bioinformatics and Biostatistics, College of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240 China
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11
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Yamanegi K, Yamada N, Nakasho K, Nishiura H. Erythroblast differentiation at spleen in Q137E mutant ribosomal protein S19 gene knock-in C57BL/6J mice. Immunobiology 2017; 223:118-124. [PMID: 29017823 DOI: 10.1016/j.imbio.2017.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 07/01/2017] [Accepted: 10/03/2017] [Indexed: 01/27/2023]
Abstract
We recently found that erythroblast-like cells derived from human leukaemia K562 cells express C5a receptor (C5aR) and produce its antagonistic and agonistic ligand ribosomal protein S19 (RP S19) polymer, which is cross-linked between K122 and Q137 by tissue transglutaminases. RP S19 polymer binds to the reciprocal C5aRs on erythroblast-like cells and macrophage-like cells derived from human monocytic THP-1 cells and promotes differentiation into reticulocyte-like cells through enucleation in vitro. To examine the roles of RP S19 polymer in mouse erythropoiesis, we prepared Q137E mutant RP S19 gene knock-in C57BL/6J mice. In contrast to wild-type mice, erythroblast numbers at the preliminary stage (CD71high/TER119low) in spleen based on transferrin receptor (CD71) and glycophorin A (TER119) values and erythrocyte numbers in orbital artery bloods were not largely changed in knock-in mice. Conversely, erythroblast numbers at the early stage (CD71high/TER119high) were significantly decreased in spleen by knock-in mice. The reduction of early erythroblast numbers in spleen was enhanced by the phenylhydrazine-induced pernicious anemia model knock-in mice and was rescued by a functional analogue of RP S19 dimer S-tagged C5a/RP S19. These data indicated that RP S19 polymer plays the roles in the early erythroblast differentiation of C57BL/6J mouse spleen.
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Affiliation(s)
- Koji Yamanegi
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
| | - Naoko Yamada
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
| | - Keiji Nakasho
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
| | - Hiroshi Nishiura
- Division of Functional Pathology, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
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12
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Debnath S, Jaako P, Siva K, Rothe M, Chen J, Dahl M, Gaspar HB, Flygare J, Schambach A, Karlsson S. Lentiviral Vectors with Cellular Promoters Correct Anemia and Lethal Bone Marrow Failure in a Mouse Model for Diamond-Blackfan Anemia. Mol Ther 2017; 25:1805-1814. [PMID: 28434866 PMCID: PMC5542636 DOI: 10.1016/j.ymthe.2017.04.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 03/28/2017] [Accepted: 04/01/2017] [Indexed: 01/22/2023] Open
Abstract
Diamond-Blackfan anemia is a congenital erythroid hypoplasia and is associated with physical malformations and a predisposition to cancer. Twenty-five percent of patients with Diamond-Blackfan anemia have mutations in a gene encoding ribosomal protein S19 (RPS19). Through overexpression of RPS19 using a lentiviral vector with the spleen focus-forming virus promoter, we demonstrated that the Diamond-Blackfan anemia phenotype can be successfully treated in Rps19-deficient mice. In our present study, we assessed the efficacy of a clinically relevant promoter, the human elongation factor 1α short promoter, with or without the locus control region of the β-globin gene for treatment of RPS19-deficient Diamond-Blackfan anemia. The findings demonstrate that these vectors rescue the proliferation defect and improve erythroid development of transduced RPS19-deficient bone marrow cells. Remarkably, bone marrow failure and severe anemia in Rps19-deficient mice was cured with enforced expression of RPS19 driven by the elongation factor 1α short promoter. We also demonstrate that RPS19-deficient bone marrow cells can be transduced and these cells have the capacity to repopulate bone marrow in long-term reconstituted mice. Our results collectively demonstrate the feasibility to cure RPS19-deficient Diamond-Blackfan anemia using lentiviral vectors with cellular promoters that possess a reduced risk of insertional mutagenesis.
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Affiliation(s)
- Shubhranshu Debnath
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Lund 22184, Sweden
| | - Pekka Jaako
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Lund 22184, Sweden
| | - Kavitha Siva
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Lund 22184, Sweden
| | - Michael Rothe
- Institute of Experimental Hematology, Hannover Medical School, Hannover 30625, Germany
| | - Jun Chen
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Lund 22184, Sweden
| | - Maria Dahl
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Lund 22184, Sweden
| | - H Bobby Gaspar
- Molecular Immunology Unit, Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Johan Flygare
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Lund 22184, Sweden
| | - Axel Schambach
- Institute of Experimental Hematology, Hannover Medical School, Hannover 30625, Germany; Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Stefan Karlsson
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Lund 22184, Sweden.
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13
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The roles of a ribosomal protein S19 polymer in a mouse model of carrageenan-induced acute pleurisy. Immunobiology 2017; 222:738-750. [PMID: 28190533 DOI: 10.1016/j.imbio.2017.02.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 01/24/2017] [Accepted: 02/05/2017] [Indexed: 12/21/2022]
Abstract
C5-deficient mice usually present moderate neutrophil activation during the initiation phase of acute inflammation. Conversely, C5a receptor (C5aR)-deficient mice show unusually excessive activation of neutrophils. We identified the ribosomal protein S19 (RP S19) polymer, which is cross-linked at Lys122 and Gln137 by transglutaminases in apoptotic neutrophils, as a second C5aR ligand during the resolution phase of acute inflammation. The RP S19 polymer promotes apoptosis via the neutrophil C5aR and phagocytosis via the macrophage C5aR. To confirm the roles of the RP S19 polymer, we employed a carrageenan-induced acute pleurisy mouse model using C57BL/6J mice with a knock-in of the Gln137Glu mutant RP S19 gene and replaced the RP S19 polymer with either an S-tagged C5a/RP S19 recombinant protein or the RP S19122-145 peptide monomer and dimer (as functional C5aR agonists/antagonists) and the RP S19122-145 peptide trimer (as a functional C5aR antagonist). Neutrophils and macrophages were still present in the thoracic cavities of the knock-in mice at 24h and 7days after carrageenan injection, respectively. Knock-in mice showed structural organization and severe hemorrhaging from the surrounding small vessels of the alveolar walls in the lung parenchyma. In contrast to the RP S19122-145 peptide monomer and trimer, the simultaneous presence of S-tagged C5a/RP S19 and the RP S19122-145 peptide dimer completely improved the physiological and pathological acute inflammatory cues. The RP S19 polymer, especially the dimer, appears to play a role at the resolution phase of carrageenan-induced acute pleurisy in C57BL/6J model mice.
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14
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Robertson AL, Avagyan S, Gansner JM, Zon LI. Understanding the regulation of vertebrate hematopoiesis and blood disorders - big lessons from a small fish. FEBS Lett 2016; 590:4016-4033. [PMID: 27616157 DOI: 10.1002/1873-3468.12415] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/22/2016] [Accepted: 09/07/2016] [Indexed: 12/12/2022]
Abstract
Hematopoietic stem cells (HSCs) give rise to all differentiated blood cells. Understanding the mechanisms that regulate self-renewal and lineage specification of HSCs is key for developing treatments for many human diseases. Zebrafish have emerged as an excellent model for studying vertebrate hematopoiesis. This review will highlight the unique strengths of zebrafish and important findings that have emerged from studies of blood development and disorders using this system. We discuss recent advances in our understanding of hematopoiesis, including the origin of HSCs, molecular control of their development, and key signaling pathways involved in their regulation. We highlight significant findings from zebrafish models of blood disorders and discuss their application for investigating stem cell dysfunction in disease and for the development of new therapeutics.
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Affiliation(s)
- Anne L Robertson
- Division of Hematology/Oncology, Boston Children's Hospital and Harvard Medical School, MA, USA
| | - Serine Avagyan
- Division of Hematology/Oncology, Boston Children's Hospital and Dana-Farber Cancer Institute, MA, USA
| | - John M Gansner
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Leonard I Zon
- Howard Hughes Medical Institute, Harvard Stem Cell Institute, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA
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15
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D'Allard DL, Liu JM. Toward RNA Repair of Diamond Blackfan Anemia Hematopoietic Stem Cells. Hum Gene Ther 2016; 27:792-801. [PMID: 27550323 DOI: 10.1089/hum.2016.081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Diamond blackfan anemia (DBA) is a well-known inherited bone marrow failure syndrome mostly caused by mutations in ribosomal protein (RP) genes but also rarely in the hematopoietic transcription factor gene, GATA1, or TSR2, a ribosomal protein (Rps26) chaperone gene. About 25% of patients have heterozygous mutations in the RPS19 gene, which leads to haploinsufficiency of Rps19 protein in most cases. However, some RPS19 missense mutations appear to act in a dominant negative fashion. DBA typically leads to a hypoplastic anemia that becomes apparent during the first year of life, and standard treatment includes steroids or red blood cell transfusions, each modality having attendant side effects. The only curative therapy is allogeneic stem-cell transplantation, but this option is limited to patients with a histocompatible donor. DBA-mutant embryonic, induced pluripotent, and hematopoietic stem cells all exhibit growth abnormalities that can be corrected by DNA gene transfer, suggesting the possibility of ex vivo autologous gene therapy. The authors have been interested in the application of spliceosome-mediated mRNA trans-splicing (SMaRT) technology to RNA repair of DBA stem cells. Compared with gene replacement or other RNA re-programming approaches, SMaRT has several potential advantages. First, delivery of the entire normal cDNA is unnecessary, thus minimizing the overall size of the construct for packaging into a viral delivery vector. Second, RNA transcription of the corrected gene relies on the cell's endogenous transcriptional, processing, and regulatory machinery, thereby ensuring faithful and contextual expression. Third, RNA trans-splicing employs the endogenous spliceosome enzymatic machinery present in nearly all cells. Fourth, RNA trans-splicing converts mutant transcripts into therapeutically useful mRNA, and thus may be capable of treating disorders caused by dominant negative mutations. This review critically assesses prospects for both gene and RNA repair in DBA stem cells.
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Affiliation(s)
- Diane L D'Allard
- Les Nelkin Memorial Pediatric Oncology Laboratory, The Feinstein Institute for Medical Research , Manhasset, New York
| | - Johnson M Liu
- Les Nelkin Memorial Pediatric Oncology Laboratory, The Feinstein Institute for Medical Research , Manhasset, New York
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16
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Sjögren SE, Siva K, Soneji S, George AJ, Winkler M, Jaako P, Wlodarski M, Karlsson S, Hannan RD, Flygare J. Glucocorticoids improve erythroid progenitor maintenance and dampen Trp53 response in a mouse model of Diamond-Blackfan anaemia. Br J Haematol 2015; 171:517-29. [PMID: 26305041 PMCID: PMC5014181 DOI: 10.1111/bjh.13632] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 07/03/2015] [Indexed: 01/06/2023]
Abstract
Diamond-Blackfan anaemia (DBA) is a rare congenital disease causing severe anaemia and progressive bone marrow failure. The majority of patients carry mutations in ribosomal proteins, which leads to depletion of erythroid progenitors in the bone marrow. As many as 40% of all DBA patients receive glucocorticoids to alleviate their anaemia. However, despite their use in DBA treatment for more than half a century, the therapeutic mechanisms of glucocorticoids remain largely unknown. Therefore we sought to study disease specific effects of glucocorticoid treatment using a ribosomal protein s19 (Rps19) deficient mouse model of DBA. This study determines for the first time that a mouse model of DBA can respond to glucocorticoid treatment, similar to DBA patients. Our results demonstrate that glucocorticoid treatment reduces apoptosis, rescues erythroid progenitor depletion and premature differentiation of erythroid cells. Furthermore, glucocorticoids prevent Trp53 activation in Rps19-deficient cells- in a disease-specific manner. Dissecting the therapeutic mechanisms behind glucocorticoid treatment of DBA provides indispensible insight into DBA pathogenesis. Identifying mechanisms important for DBA treatment also enables development of more disease-specific treatments of DBA.
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Affiliation(s)
- Sara E Sjögren
- Department of Molecular Medicine and Gene Therapy, Lund University, Lund, Sweden.,Lund Stem Cell Centre, Lund University, Lund, Sweden
| | - Kavitha Siva
- Department of Molecular Medicine and Gene Therapy, Lund University, Lund, Sweden.,Lund Stem Cell Centre, Lund University, Lund, Sweden
| | - Shamit Soneji
- Lund Stem Cell Centre, Lund University, Lund, Sweden
| | - Amee J George
- Oncogenic Signalling and Growth Control Program, Peter MacCallum Cancer Centre, East Melbourne, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Australia.,Department of Cancer Biology and Therapeutics, John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Marcus Winkler
- Department of Molecular Medicine and Gene Therapy, Lund University, Lund, Sweden.,Lund Stem Cell Centre, Lund University, Lund, Sweden
| | - Pekka Jaako
- Lund Stem Cell Centre, Lund University, Lund, Sweden.,Division of Molecular Haematology, Lund University, Lund, Sweden
| | - Marcin Wlodarski
- Division of Paediatric Haematology and Oncology, University of Freiburg, Freiburg, Germany
| | - Stefan Karlsson
- Department of Molecular Medicine and Gene Therapy, Lund University, Lund, Sweden.,Lund Stem Cell Centre, Lund University, Lund, Sweden
| | - Ross D Hannan
- Oncogenic Signalling and Growth Control Program, Peter MacCallum Cancer Centre, East Melbourne, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Australia.,Department of Cancer Biology and Therapeutics, John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Johan Flygare
- Department of Molecular Medicine and Gene Therapy, Lund University, Lund, Sweden.,Lund Stem Cell Centre, Lund University, Lund, Sweden
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17
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Yu C, Luo C, Qu B, Khudhair N, Gu X, Zang Y, Wang C, Zhang N, Li Q, Gao X. Molecular network including eIF1AX, RPS7, and 14-3-3γ regulates protein translation and cell proliferation in bovine mammary epithelial cells. Arch Biochem Biophys 2014; 564:142-55. [DOI: 10.1016/j.abb.2014.09.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 09/21/2014] [Accepted: 09/23/2014] [Indexed: 02/07/2023]
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18
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Jaako P, Debnath S, Olsson K, Modlich U, Rothe M, Schambach A, Flygare J, Karlsson S. Gene therapy cures the anemia and lethal bone marrow failure in a mouse model of RPS19-deficient Diamond-Blackfan anemia. Haematologica 2014; 99:1792-8. [PMID: 25216681 DOI: 10.3324/haematol.2014.111195] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Diamond-Blackfan anemia is a congenital erythroid hypoplasia caused by functional haploinsufficiency of genes encoding ribosomal proteins. Mutations involving the ribosomal protein S19 gene are detected in 25% of patients. Enforced expression of ribosomal protein S19 improves the overall proliferative capacity, erythroid colony-forming potential and erythroid differentiation of hematopoietic progenitors from ribosomal protein S19-deficient patients in vitro and in vivo following xenotransplantation. However, studies using animal models are needed to assess the therapeutic efficacy and safety of the viral vectors. In the present study we have validated the therapeutic potential of gene therapy using mouse models of ribosomal protein S19-deficient Diamond-Blackfan anemia. Using lentiviral gene transfer we demonstrated that enforced expression of ribosomal protein S19 cures the anemia and lethal bone marrow failure in recipients transplanted with ribosomal protein S19-deficient cells. Furthermore, gene-corrected ribosomal protein S19-deficient cells showed an increased pan-hematopoietic contribution over time compared to untransduced cells without signs of vector-mediated toxicity. Our study provides a proof of principle for the development of clinical gene therapy to cure ribosomal protein 19-deficient Diamond-Blackfan anemia.
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Affiliation(s)
- Pekka Jaako
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Sweden
| | - Shubhranshu Debnath
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Sweden
| | - Karin Olsson
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Sweden
| | - Ute Modlich
- Institute of Experimental Hematology, Hannover Medical School, Germany; LOEWE Research Group for Gene Modification in Stem Cells, Paul-Ehrlich-Institute, 63225 Langen, Germany
| | - Michael Rothe
- Institute of Experimental Hematology, Hannover Medical School, Germany
| | - Axel Schambach
- Institute of Experimental Hematology, Hannover Medical School, Germany
| | - Johan Flygare
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Sweden
| | - Stefan Karlsson
- Molecular Medicine and Gene Therapy, Lund Strategic Center for Stem Cell Biology, Lund University, Sweden;
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19
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Ribosomal and hematopoietic defects in induced pluripotent stem cells derived from Diamond Blackfan anemia patients. Blood 2013; 122:912-21. [PMID: 23744582 DOI: 10.1182/blood-2013-01-478321] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Diamond Blackfan anemia (DBA) is a congenital disorder with erythroid (Ery) hypoplasia and tissue morphogenic abnormalities. Most DBA cases are caused by heterozygous null mutations in genes encoding ribosomal proteins. Understanding how haploinsufficiency of these ubiquitous proteins causes DBA is hampered by limited availability of tissues from affected patients. We generated induced pluripotent stem cells (iPSCs) from fibroblasts of DBA patients carrying mutations in RPS19 and RPL5. Compared with controls, DBA fibroblasts formed iPSCs inefficiently, although we obtained 1 stable clone from each fibroblast line. RPS19-mutated iPSCs exhibited defects in 40S (small) ribosomal subunit assembly and production of 18S ribosomal RNA (rRNA). Upon induced differentiation, the mutant clone exhibited globally impaired hematopoiesis, with the Ery lineage affected most profoundly. RPL5-mutated iPSCs exhibited defective 60S (large) ribosomal subunit assembly, accumulation of 12S pre-rRNA, and impaired erythropoiesis. In both mutant iPSC lines, genetic correction of ribosomal protein deficiency via complementary DNA transfer into the "safe harbor" AAVS1 locus alleviated abnormalities in ribosome biogenesis and hematopoiesis. Our studies show that pathological features of DBA are recapitulated by iPSCs, provide a renewable source of cells to model various tissue defects, and demonstrate proof of principle for genetic correction strategies in patient stem cells.
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20
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Sjögren SE, Flygare J. Progress towards mechanism-based treatment for Diamond-Blackfan anemia. ScientificWorldJournal 2012; 2012:184362. [PMID: 22619618 PMCID: PMC3349117 DOI: 10.1100/2012/184362] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Accepted: 12/20/2011] [Indexed: 11/17/2022] Open
Abstract
Diamond-Blackfan anemia (DBA) is a congenital erythroid hypoplastic anemia, characterized by macrocytic anemia, reticulocytopenia, and severely reduced numbers of erythroid precursors in the bone marrow. For more than fifty years, glucocorticoids have remained the main option for pharmacological treatment of DBA. While continuous glucocorticoid administration increases hemoglobin levels in a majority of DBA patients, it also causes severe side effects. There is therefore a great need for more specific and effective treatments to boost or replace the use of glucocorticoids. Over the years, many alternative therapies have been tried out, but most of them have shown to be ineffective. Here we review previous and current attempts to develop such alternative therapies for DBA. We further discuss how emerging knowledge regarding the pathological mechanism in DBA and the therapeutic mechanism of glucocorticoids treatment may reveal novel drug targets for DBA treatment.
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Affiliation(s)
- Sara E Sjögren
- Department of Molecular Medicine and Gene Therapy, 22184 Lund University, Lund, Sweden
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21
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Abstract
Abstract
Fifty percent of Diamond-Blackfan anemia (DBA) patients possess mutations in genes coding for ribosomal proteins (RPs). To identify new mutations, we investigated large deletions in the RP genes RPL5, RPL11, RPL35A, RPS7, RPS10, RPS17, RPS19, RPS24, and RPS26. We developed an easy method based on quantitative-PCR in which the threshold cycle correlates to gene copy number. Using this approach, we were able to diagnose 7 of 27 Japanese patients (25.9%) possessing mutations that were not detected by sequencing. Among these large deletions, similar results were obtained with 6 of 7 patients screened with a single nucleotide polymorphism array. We found an extensive intragenic deletion in RPS19, including exons 1-3. We also found 1 proband with an RPL5 deletion, 1 patient with an RPL35A deletion, 3 with RPS17 deletions, and 1 with an RPS19 deletion. In particular, the large deletions in the RPL5 and RPS17 alleles are novel. All patients with a large deletion had a growth retardation phenotype. Our data suggest that large deletions in RP genes comprise a sizable fraction of DBA patients in Japan. In addition, our novel approach may become a useful tool for screening gene copy numbers of known DBA genes.
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22
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Abstract
Despite significant improvements in our understanding of the pathophysiology of Diamond Blackfan anemia (DBA), there have been few advances in therapy. The cornerstones of treatment remain corticosteroids, chronic red blood cell transfusions, and hematopoietic stem cell transplantation, each of which is fraught with complications. In this article, we will review the history of therapies that have been offered to patients with DBA, summarize the current standard of care, including management of side effects, and discuss novel therapeutics that are being developed in the context of the research into the roles of ribosomal haplo-insufficiency and p53 activation in Diamond Blackfan anemia.
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Affiliation(s)
- Anupama Narla
- Brigham and Women's Hospital, Department of Medicine, Boston, MA, USA
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23
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Abstract
Diamond Blackfan anemia (DBA) is a genetic syndrome characterized by red blood cell aplasia in association with developmental abnormalities such as growth retardation, orofacial, hand or limb malformations, urogenital anomalies, and heart defects. The only known cause is heterozygosity for mutations in genes encoding ribosomal proteins. Understanding how defective ribosome biogenesis and function, important for all cells, causes defects in erythropoiesis and tissue-specific phenotypes during development is paramount to the evolution of effective treatment protocols. Here, we discuss how animal models based on mammals, insects, and fish replicate genetic or developmental aspects of DBA and have led to the identification of pathways and candidate molecules that are important in the pathogenesis of the disease. A recurring theme in many of these models suggests that defective ribosome biogenesis induces a p53-dependent cell cycle checkpoint in cells that require high levels of ribosome production and leads to cell type-specific, whole animal phenotypes.
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Affiliation(s)
- Kelly A McGowan
- Department of Genetics, Stanford University, Stanford, CA 94305, USA.
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24
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Mice with ribosomal protein S19 deficiency develop bone marrow failure and symptoms like patients with Diamond-Blackfan anemia. Blood 2011; 118:6087-96. [PMID: 21989989 DOI: 10.1182/blood-2011-08-371963] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Diamond-Blackfan anemia (DBA) is a congenital erythroid hypoplasia caused by a functional haploinsufficiency of genes encoding for ribosomal proteins. Among these genes, ribosomal protein S19 (RPS19) is mutated most frequently. Generation of animal models for diseases like DBA is challenging because the phenotype is highly dependent on the level of RPS19 down-regulation. We report the generation of mouse models for RPS19-deficient DBA using transgenic RNA interference that allows an inducible and graded down-regulation of Rps19. Rps19-deficient mice develop a macrocytic anemia together with leukocytopenia and variable platelet count that with time leads to the exhaustion of hematopoietic stem cells and bone marrow failure. Both RPS19 gene transfer and the loss of p53 rescue the DBA phenotype implying the potential of the models for testing novel therapies. This study demonstrates the feasibility of transgenic RNA interference to generate mouse models for human diseases caused by haploinsufficient expression of a gene.
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25
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Da Costa L, Moniz H, Simansour M, Tchernia G, Mohandas N, Leblanc T. Diamond-Blackfan anemia, ribosome and erythropoiesis. Transfus Clin Biol 2010; 17:112-9. [PMID: 20655265 DOI: 10.1016/j.tracli.2010.06.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Accepted: 06/04/2010] [Indexed: 01/19/2023]
Abstract
Diamond-Blackfan anemia is a rare inherited bone marrow failure syndrome (five to seven cases per million live births) characterized by an aregenerative, usually macrocytic anemia with an absence or less than 5% of erythroid precursors (erythroblastopenia) in an otherwise normal bone marrow. The platelet and the white cell counts are usually normal but neutropenia, thrombopenia or thrombocytosis have been noted at diagnosis. In 40 to 50% of DBA patients, congenital abnormalities mostly in the cephalic area and in thumbs and upper limbs have been described. Recent analysis did show a phenotype/genotype correlation. Congenital erythroblastopenia of DBA is the first human disease identified to result from defects in ribosomal biogenesis. The first ribosomal gene involved in DBA, ribosomal protein (RP) gene S19 (RPS19 gene), was identified in 1999. Subsequently, mutations in 12 other RP genes out of a total of 78 RP genes have been identified in DBA. All RP gene mutations described to date are heterozygous and dominant inheritance has been documented in 40 to 45% of affected individuals. As RP mutations are yet to be identified in approximately 50% of DBA cases, it is likely that other yet to be identified genes involved in ribosomal biogenesis or other pathways may be responsible for DBA phenotype.
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Affiliation(s)
- L Da Costa
- Service d'hématologie biologique, hôpital R.-Debré, 48, boulevard Sérurier, 75019 Paris, France.
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26
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Diamond Blackfan Anemia at the Crossroad between Ribosome Biogenesis and Heme Metabolism. Adv Hematol 2010; 2010:790632. [PMID: 20454576 PMCID: PMC2864449 DOI: 10.1155/2010/790632] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Revised: 01/22/2010] [Accepted: 02/16/2010] [Indexed: 01/23/2023] Open
Abstract
Diamond-Blackfan anemia (DBA) is a rare, pure red-cell aplasia that presents during infancy. Approximately 40% of cases are associated with other congenital defects, particularly malformations of the upper limb or craniofacial region. Mutations in the gene coding for the ribosomal protein RPS19 have been identified in 25% of patients with DBA, with resulting impairment of 18S rRNA processing and 40S ribosomal subunit formation. Moreover, mutations in other ribosomal protein coding genes account for about 25% of other DBA cases. Recently, the analysis of mice from which the gene coding for the heme exporter Feline Leukemia Virus subgroup C Receptor (FLVCR1) is deleted suggested that this gene may be involved in the pathogenesis of DBA. FLVCR1-null mice show a phenotype resembling that of DBA patients, including erythroid failure and malformations. Interestingly, some DBA patients have disease linkage to chromosome 1q31, where FLVCR1 is mapped. Moreover, it has been reported that cells from DBA patients express alternatively spliced isoforms of FLVCR1 which encode non-functional proteins. Herein, we review the known roles of RPS19 and FLVCR1 in ribosome function and heme metabolism respectively, and discuss how the deficiency of a ribosomal protein or of a heme exporter may result in the same phenotype.
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Masumi A, Hamaguchi I, Kuramitsu M, Mizukami T, Takizawa K, Momose H, Naito S, Yamaguchi K. Interferon regulatory factor-2 induces megakaryopoiesis in mouse bone marrow hematopoietic cells. FEBS Lett 2009; 583:3493-500. [DOI: 10.1016/j.febslet.2009.10.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2009] [Revised: 09/24/2009] [Accepted: 10/01/2009] [Indexed: 11/30/2022]
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Badhai J, Fröjmark AS, J Davey E, Schuster J, Dahl N. Ribosomal protein S19 and S24 insufficiency cause distinct cell cycle defects in Diamond-Blackfan anemia. Biochim Biophys Acta Mol Basis Dis 2009; 1792:1036-42. [PMID: 19689926 DOI: 10.1016/j.bbadis.2009.08.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 08/06/2009] [Accepted: 08/07/2009] [Indexed: 11/25/2022]
Abstract
Diamond-Blackfan anemia (DBA) is a severe congenital anemia characterized by a specific decrease of erythroid precursors. The disease is also associated with growth retardation, congenital malformations, a predisposition for malignant disease and heterozygous mutations in either of the ribosomal protein (RP) genes RPS7, RPS17, RPS19, RPS24, RPL5, RPL11 and RPL35a. We show herein that primary fibroblasts from DBA patients with truncating mutations in RPS19 or in RPS24 have a marked reduction in proliferative capacity. Mutant fibroblasts are associated with extended cell cycles and normal levels of p53 when compared to w.t. cells. RPS19 mutant fibroblasts accumulate in the G1 phase, whereas the RPS24 mutant cells show an altered progression in the S phase resulting in reduced levels in the G2/M phase. RPS19 deficient cells exhibit reduced levels of Cyclin-E, CDK2 and retinoblastoma (Rb) protein supporting a cell cycle arrest in the G1 phase. In contrast, RPS24 deficient cells show increased levels of the cell cycle inhibitor p21 and a seemingly opposing increase in Cyclin-E, CDK4 and CDK6. In combination, our results show that RPS19 and RPS24 insufficient fibroblasts have an impaired growth caused by distinct blockages in the cell cycle. We suggest this proliferative constraint to be an important contributing mechanism for the complex extra-hematological features observed in DBA.
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Affiliation(s)
- Jitendra Badhai
- Department of Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
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Hou YL, Hou WR, Ren ZL, Hao YZ, Zhang T. cDNA Cloning and Overexpression of Ribosomal Protein S19 Gene (RPS19) from the Giant Panda. DNA Cell Biol 2009; 28:41-7. [PMID: 19072723 DOI: 10.1089/dna.2008.0799] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Yi-Ling Hou
- College of Agriculture, Sichuan Agricultural University, Ya-an, China
- College of Life Science, China West Normal University, Nanchong, China
| | - Wan-Ru Hou
- College of Life Science, China West Normal University, Nanchong, China
| | - Zheng-Long Ren
- College of Agriculture, Sichuan Agricultural University, Ya-an, China
| | - Yan-Zhe Hao
- College of Life Science, China West Normal University, Nanchong, China
| | - Tian Zhang
- College of Life Science, China West Normal University, Nanchong, China
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Vlachos A, Ball S, Dahl N, Alter BP, Sheth S, Ramenghi U, Meerpohl J, Karlsson S, Liu JM, Leblanc T, Paley C, Kang EM, Leder EJ, Atsidaftos E, Shimamura A, Bessler M, Glader B, Lipton JM. Diagnosing and treating Diamond Blackfan anaemia: results of an international clinical consensus conference. Br J Haematol 2008; 142:859-76. [PMID: 18671700 PMCID: PMC2654478 DOI: 10.1111/j.1365-2141.2008.07269.x] [Citation(s) in RCA: 309] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Diamond Blackfan anaemia (DBA) is a rare, genetically and clinically heterogeneous, inherited red cell aplasia. Classical DBA affects about seven per million live births and presents during the first year of life. However, as mutated genes have been discovered in DBA, non-classical cases with less distinct phenotypes are being described in adults as well as children. In caring for these patients it is often difficult to have a clear understanding of the treatment options and their outcomes because of the lack of complete information on the natural history of the disease. The purpose of this document is to review the criteria for diagnosis, evaluate the available treatment options, including corticosteroid and transfusion therapies and stem cell transplantation, and propose a plan for optimizing patient care. Congenital anomalies, mode of inheritance, cancer predisposition, and pregnancy in DBA are also reviewed. Evidence-based conclusions will be made when possible; however, as in many rare diseases, the data are often anecdotal and the recommendations are based upon the best judgment of experienced clinicians. The recommendations regarding the diagnosis and management described in this report are the result of deliberations and discussions at an international consensus conference.
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Affiliation(s)
- Adrianna Vlachos
- The Feinstein Institute for Medical Research, Manhasset, NY, USA.
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Flygare J, Olsson K, Richter J, Karlsson S. Gene therapy of Diamond Blackfan anemia CD34(+) cells leads to improved erythroid development and engraftment following transplantation. Exp Hematol 2008; 36:1428-35. [PMID: 18715690 DOI: 10.1016/j.exphem.2008.06.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2008] [Revised: 06/16/2008] [Accepted: 06/24/2008] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Diamond-Blackfan anemia (DBA) is a rare congenital hypoplastic anemia caused by mutations in ribosomal protein (RP) genes. Our aim is to develop gene therapy for DBA patients with mutations in RPS19. We previously demonstrated that RPS19 gene transfer partially corrects erythroid development in vitro. In this study, we asked if RPS19 gene transfer corrects erythroid development in unsorted cells transplanted to immunodeficient mice and if the RPS19-corrected fraction has a proliferative advantage after transplantation. We further determined if high level of RPS19 expression is required for correction. MATERIAL AND METHODS Mobilized peripheral blood CD34(+) cells were transduced by oncoretroviral vector particles pseudotyped with the feline endogenous retrovirus envelope. Vectors containing two different promoters with different RPS19 transgene expression levels were compared. Transduced cells were transplanted to immunocompromised nonobese diabetic/severe combined immunodeficient-beta2 microglobulin null mice in order to assess therapeutic effects of RPS19 gene transfer in vivo. RESULTS We show that correction of erythroid development requires high RPS19 expression. The corrected fraction of unselected DBA cells have a survival advantage in vivo, suggesting that successful gene therapy may only require correction of a fraction of the patient cells. CONCLUSION Our findings are fundamental for development of clinical gene therapy for DBA because they demonstrate increased engraftment of RPS19-transduced cells without selection of gene-corrected cells prior to transplantation, an essential prelude to studying long-term therapeutic effects in emerging animal models for DBA.
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Affiliation(s)
- Johan Flygare
- Department of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University Hospital, Lund, Sweden.
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Kuramitsu M, Hamaguchi I, Takuo M, Masumi A, Momose H, Takizawa K, Mochizuki M, Naito S, Yamaguchi K. Deficient RPS19 protein production induces cell cycle arrest in erythroid progenitor cells. Br J Haematol 2008; 140:348-59. [PMID: 18217898 DOI: 10.1111/j.1365-2141.2007.06930.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The gene encoding ribosomal protein S19 (RPS19) is one of the responsible genes for Diamond-Blackfan anaemia (DBA), a congenital erythroblastopenia. Although haplo-insufficiency of RPS19 has been suggested to be the onset mechanism underlying the pathogenesis of DBA, the sequential mechanism has not been elucidated. In order to analyse the consequences of the missense mutation of RPS19 specific for DBA patients, we made mutated RPS19 expression vectors. Twelve C-terminally Flag-tagged missense mutants were exogenously expressed from retroviral vectors and analysed by Western blot analysis and flow cytometry. When these 12 mutants were expressed in the erythro-leukaemic cell lines K562 and human bone marrow CD34(+) cells, almost all of the mutant proteins (except for G120R) were unstable, and the levels of mutated RPS19 protein were significantly low. To address the effect of deficient RPS19 expression on cell proliferation, RPS19 was downregulated by siRNA. Repressive expression of RPS19 in human CD34(+) cells produced an elevated number of cells at G0 and induced erythroid progenitor-specific defects in BM cells. These results suggest that abnormal ribosomal biogenesis causes inadequate cell cycle arrest in haematopoietic progenitors, and that, subsequently, erythroid progenitors are specifically hampered. These in vitro phenotypes of genetically manipulated CD34(+) cells mimic DBA pathogenesis.
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Affiliation(s)
- Madoka Kuramitsu
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Disease, Musashimurayama, Tokyo, Japan
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Miyake K, Utsugisawa T, Flygare J, Kiefer T, Hamaguchi I, Richter J, Karlsson S. Ribosomal protein S19 deficiency leads to reduced proliferation and increased apoptosis but does not affect terminal erythroid differentiation in a cell line model of Diamond-Blackfan anemia. Stem Cells 2007; 26:323-9. [PMID: 17962699 DOI: 10.1634/stemcells.2007-0569] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Diamond-Blackfan anemia (DBA) is a congenital red-cell aplasia in which 25% of the patients have a mutation in the ribosomal protein (RP) S19 gene. It is not known how the RPS19 deficiency impairs erythropoiesis and proliferation of hematopoietic progenitors. To elucidate molecular mechanisms in RPS19-deficient DBA, we analyzed the effects of RPS19 deficiency on erythropoietin (EPO)-induced signal transduction, cell cycle, and apoptosis in RPS19-deficient TF-1 cells. We did not find any abnormality in EPO-induced signal transduction. However, RPS19-deficient TF-1 cells showed G0/G1 arrest (82% vs. 58%; p < .05) together with accumulation of p21 and p27. The fraction of apoptotic cells detected by Annexin V analysis also increased compared with control cells (13% vs. 3.1%; p < .05). Western blot analysis of apoptosis-related proteins showed that the level of bcl-2 and Bad was decreased and Bax was increased in RPS19-deficient TF-1 cells. Moreover, primary CD34-positive cells from DBA patients detected by Annexin V analysis also generated a higher number of apoptotic cells compared with normal CD34-positive cells during in vitro culture (38% vs. 8.9%; n = 5; p < .001). Finally, we show that although RPS19 silencing reduces EPO-induced development of erythroid progenitors expressing glycophorin A (GPA), RPS19 silencing in cells already expressing GPA does not affect GPA expression. These findings indicate that RPS19 deficiency causes apoptosis and accelerated loss of erythroid progenitors in RPS19-deficient DBA.
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Affiliation(s)
- Koich Miyake
- Molecular Medicine and Gene Therapy, Lund University, BMC A12, 221 84, Lund, Sweden
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Abstract
Diamond-Blackfan anemia (DBA) is a congenital erythroid aplasia that usually presents as macrocytic anemia during infancy. Linkage analysis suggests that at least 4 genes are associated with DBA of which 2 have been identified so far. The known DBA genes encode the ribosomal proteins S19 and S24 accounting for 25% and 2% of the patients, respectively. Herein, we review possible links between ribosomal proteins and erythropoiesis that might explain DBA pathogenesis. Recent studies and emerging findings suggest that a malfunctioning translational machinery may be a cause of anemia in patients with DBA.
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Affiliation(s)
- Johan Flygare
- Department of Molecular Medicine and Gene Therapy, Institute of Molecular Medicine, and Lund Strategic Research Center for Stem Cell Biology and Cell Therapy, Lund University, A12 221-84 Lund, Sweden.
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Flygare J, Aspesi A, Bailey JC, Miyake K, Caffrey JM, Karlsson S, Ellis SR. Human RPS19, the gene mutated in Diamond-Blackfan anemia, encodes a ribosomal protein required for the maturation of 40S ribosomal subunits. Blood 2006; 109:980-6. [PMID: 16990592 PMCID: PMC1785147 DOI: 10.1182/blood-2006-07-038232] [Citation(s) in RCA: 150] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Diamond-Blackfan anemia (DBA) typically presents with red blood cell aplasia that usually manifests in the first year of life. The only gene currently known to be mutated in DBA encodes ribosomal protein S19 (RPS19). Previous studies have shown that the yeast RPS19 protein is required for a specific step in the maturation of 40S ribosomal subunits. Our objective here was to determine whether the human RPS19 protein functions at a similar step in 40S subunit maturation. Studies where RPS19 expression is reduced by siRNA in the hematopoietic cell line, TF-1, show that human RPS19 is also required for a specific step in the maturation of 40S ribosomal subunits. This maturation defect can be monitored by studying rRNA-processing intermediates along the ribosome synthesis pathway. Analysis of these intermediates in CD34- cells from the bone marrow of patients with DBA harboring mutations in RPS19 revealed a pre-rRNA-processing defect similar to that observed in TF-1 cells where RPS19 expression was reduced. This defect was observed to a lesser extent in CD34+ cells from patients with DBA who have mutations in RPS19.
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Affiliation(s)
- Johan Flygare
- Department of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University Hospital, Sweden
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Gazda HT, Kho AT, Sanoudou D, Zaucha JM, Kohane IS, Sieff CA, Beggs AH. Defective ribosomal protein gene expression alters transcription, translation, apoptosis, and oncogenic pathways in Diamond-Blackfan anemia. Stem Cells 2006; 24:2034-44. [PMID: 16741228 PMCID: PMC3372914 DOI: 10.1634/stemcells.2005-0554] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Diamond-Blackfan anemia (DBA) is a broad developmental disease characterized by anemia, bone marrow (BM) erythroblastopenia, and an increased incidence of malignancy. Mutations in ribosomal protein gene S19 (RPS19) are found in approximately 25% of DBA patients; however, the role of RPS19 in the pathogenesis of DBA remains unknown. Using global gene expression analysis, we compared highly purified multipotential, erythroid, and myeloid BM progenitors from RPS19 mutated and control individuals. We found several ribosomal protein genes downregulated in all DBA progenitors. Apoptosis genes, such as TNFRSF10B and FAS, transcriptional control genes, including the erythropoietic transcription factor MYB (encoding c-myb), and translational genes were greatly dysregulated, mostly in diseased erythroid cells. Cancer-related genes, including RAS family oncogenes and tumor suppressor genes, were significantly dysregulated in all diseased progenitors. In addition, our results provide evidence that RPS19 mutations lead to codownregulation of multiple ribosomal protein genes, as well as downregulation of genes involved in translation in DBA cells. In conclusion, the altered expression of cancer-related genes suggests a molecular basis for malignancy in DBA. Downregulation of c-myb expression, which causes complete failure of fetal liver erythropoiesis in knockout mice, suggests a link between RPS19 mutations and reduced erythropoiesis in DBA.
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Affiliation(s)
- Hanna T Gazda
- Department of Pediatric Oncology, Dana Farber Cancer Institute, Boston, Massachusetts, USA.
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Nishiura H, Tanase S, Shibuya Y, Futa N, Sakamoto T, Higginbottom A, Monk P, Zwirner J, Yamamoto T. S19 ribosomal protein dimer augments metal-induced apoptosis in a mouse fibroblastic cell line by ligation of the C5a receptor. J Cell Biochem 2005; 94:540-53. [PMID: 15543555 DOI: 10.1002/jcb.20318] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
To analyze the role of S19 ribosomal protein (RP S19) in apoptosis, murine NIH3T3 were transfected with either hemagglutinin peptide-tagged (HA) wild-type human RP S19 or a mutant (Gln137Asn) that is resistant to transglutaminase-catalyzed cross-linked-dimerization. Transfection with the mutant HA-RP S19 inhibited manganese (II) (Mn II)-induced apoptosis whereas the wild-type HA-RP S19 augmented apoptosis and a mock transfection had no effect. Release of the wild-type HA-RP S19 dimer but not the mutant HA-RP S19 was observed during the apoptosis. The reduced rate of apoptosis of the cells transfected with the mutant HA-RP S19 was overcome by addition of extracellular wild-type RP S19 dimer. The apoptosis rates in cells transfected with either form of human HA-RP S19 and in mock transfectants were reduced to about 40% by the presence of anti-RP S19 antibody in the culture medium. Immunofluorescence staining and fluorescence-activated cell sorting (FACS) analysis showed that the cell surface expression of the receptor for cross-linked RP S19 dimer, C5a receptor, increased during apoptosis, concomitant with phosphatidylserine exposure. The expression of the C5a receptor gene also increased twofold. Apoptosis rates in the transfected and control cell lines were also reduced by the presence of an anti-mouse C5a receptor monoclonal antibody or of a peptide C5a receptor antagonist. These results indicated the presence of an RP S19 dimer- and C5a receptor-mediated autocrine-type augmentation mechanism during Mn II-induced apoptosis in the mouse fibroblastic cell line. In contrast to the RP S19 dimer, C5a actually inhibited apoptosis, suggesting that signaling through the C5a receptor varies depending on the ligand bound.
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Affiliation(s)
- Hiroshi Nishiura
- Department of Molecular Pathology, Faculty of Medical and Pharmaceutical Sciences, Kumamoto University, 2-1-1 Honjo, Kumamoto 860-0811, Japan
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Miyake K, Flygare J, Kiefer T, Utsugisawa T, Richter J, Ma Z, Wiznerowicz M, Trono D, Karlsson S. Development of cellular models for ribosomal protein S19 (RPS19)-deficient diamond–blackfan anemia using inducible expression of siRNA against RPS19. Mol Ther 2005; 11:627-37. [PMID: 15771965 DOI: 10.1016/j.ymthe.2004.12.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2004] [Accepted: 12/05/2004] [Indexed: 10/26/2022] Open
Abstract
Diamond-Blackfan anemia (DBA) is a congenital red cell aplasia in which 25% of the patients have a mutation in the ribosomal protein S19 (RPS19) gene. No models exist for RPS19-deficient DBA and the molecular pathogenesis is unknown. To establish an in vitro inducible model for DBA, human erythroid leukemic cell lines, TF-1 and UT-7 cells, were cotransduced with a lentiviral vector expressing the green fluorescent protein (GFP) gene and small interfering RNA (siRNA) against RPS19 controlled by a tet operator regulatory element and another transactivator vector containing the red fluorescent protein (RFP) gene and the cDNA encoding a tetracycline-controllable transcriptional repressor. Following transduction, the RFP-positive and GFP-negative cell population was sorted by flow cytometry. Upon incubation with doxycycline (0.5 mug/ml), more than 98% of cells expressed GFP and the siRNA. Significant suppression of erythroid differentiation, cell growth, and colony formation was observed in cells treated with siRNA against RPS19 but not in cells treated with a control vector. These findings show that RPS19 plays an important role in the regulation of hematopoietic cell proliferation and erythroid differentiation. These novel cell lines represent models for RPS19-deficient DBA and can be used to identify the molecular mechanisms in RPS19-deficient DBA.
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Affiliation(s)
- Koichi Miyake
- Molecular Medicine and Gene Therapy, Lund University, BMC A12, 221 84 Lund, Sweden
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Gazda HT, Zhong R, Long L, Niewiadomska E, Lipton JM, Ploszynska A, Zaucha JM, Vlachos A, Atsidaftos E, Viskochil DH, Niemeyer CM, Meerpohl JJ, Rokicka-Milewska R, Pospisilova D, Wiktor-Jedrzejczak W, Nathan DG, Beggs AH, Sieff CA. RNA and protein evidence for haplo-insufficiency in Diamond-Blackfan anaemia patients with RPS19 mutations. Br J Haematol 2004; 127:105-13. [PMID: 15384984 DOI: 10.1111/j.1365-2141.2004.05152.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The genetic basis of Diamond-Blackfan anaemia (DBA), a congenital erythroid hypoplasia that shows marked clinical heterogeneity, remains obscure. However, the fact that nearly one-quarter of patients harbour a variety of mutations in RPS19, a ribosomal protein gene, provides an opportunity to examine whether haplo-insufficiency of RPS19 protein can be demonstrated in certain cases. To that end, we identified 19 of 81 DBA index cases, both familial and sporadic, with RPS19 mutations. We found 14 distinct insertions, deletions, missense, nonsense and splice site mutations in the 19 probands, and studied mutations in 10 patients at the RNA level and in three patients at the protein level. Characterization of the mutations in 10 probands, including six with novel insertions, nonsense and splice site mutations, showed that the abnormal transcript was detectable in nine cases. The RPS19 mRNA and protein in CD34+ bone marrow cells identified haplo-insufficiency in three cases predicted to have one functional allele. Our data support the notion that, in addition to rare DBA patients with the deletion of one allele, the disease in certain other RPS19 mutant patients is because of RPS19 protein haplo-insufficiency.
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Affiliation(s)
- Hanna T Gazda
- Department of Pediatric Oncology, Dana Farber Cancer Institute, Boston, MA 02115, USA.
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von Kalle C, Fehse B, Layh-Schmitt G, Schmidt M, Kelly P, Baum C. Stem cell clonality and genotoxicity in hematopoietic cells: Gene activation side effects should be avoidable. Semin Hematol 2004; 41:303-18. [PMID: 15508116 DOI: 10.1053/j.seminhematol.2004.07.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Two serious adverse events involving activation of the LMO2 oncogene through retrovirus vector insertion in the otherwise extremely successful first gene therapy trial for X-linked severe combined immunodeficieny type 1 (SCID-X1) had initially caused widespread concern in the patient and research communities. Careful consideration 1 year after diagnosis of the second case still finds 12 of the treated patients clearly benefiting from gene therapy (freedom from treatment failure, 80%; survival 100%), a situation that should not portend the end of gene therapy for this disease, and is, in fact encouraging. While current approaches are justified to treat patients with otherwise life-threatening disorders, a broad consensus has developed that systematic basic research is required to further understand the pathophysiology of these serious adverse events and to provide new insights, enabling safer and more effective gene therapy strategies. With the continued success of SCID-X1 gene therapy in the majority of patients treated, it is of even greater importance to understand exactly which vector element or combination of elements predispose to toxicity. An in-depth study of the mechanisms behind the activation of the LMO2 and gammac genes will be highly instructive for the development of safer procedures and vectors. We summarize the central observations, ongoing experimental approaches, new concepts, and developments relevant to understanding, interpreting, and eventually overcoming the real and perceived obstacles posed by insertional mutagenesis due to gene transfer vectors.
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Affiliation(s)
- C von Kalle
- Division of Experimental Hematology, Cincinnati Children's Hospital Research Foundation, Cincinnati, OH 45229, USA.
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