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Poletto E, Pinheiro CV, Schuh RS, Campagnol D, Cioato M, Garcez TNA, Martins GR, Matte U, Baldo G. Biodistribution of Transplanted Hematopoietic Precursor Cells Injected Through Different Administration Routes in Newborn Mice. Hum Gene Ther 2021; 32:495-505. [PMID: 33632008 DOI: 10.1089/hum.2019.191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Hematopoietic stem cell transplantation has been studied for several decades now, mostly as a treatment for malignancies and hematological diseases but also for genetic metabolic disorders. Since many diseases that could be potentially treated with this approach develop early in life, studies of cell transplantation in newborn mice are needed, especially for gene therapy protocols. However, the small size of pups restricts the possibilities for routes of administration, and those available are normally technically challenging. Our goal was to test different routes of administration of Lin- cells in 2-day-old mice: intraperitoneal, intravenous through temporal vein (TV), and intravenous through retro-orbital (RO) sinus. Routes were evaluated by their easiness of execution and their influence in the biodistribution of cells in the short (48 h) and medium (30 days) term. In either 48 h or 30 days, all three routes presented similar results, with cells going mostly to bone marrow, liver, and spleen in roughly the same number. RO injection resulted in quick distribution of cells to the brain, suggesting better performance than the others. Rate of failure was higher for the TV route, which was also the hardest to execute, whereas the other two were considered easier. In conclusion, TV was the hardest to perform and all routes seemed to demonstrate similar results for cell biodistribution. In particular, the RO injection results in quicker biodistribution of cells to the brain, which is particularly important in the study of genetic metabolic disorders with a neurological component.
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Affiliation(s)
- Edina Poletto
- Gene Therapy Center.,Postgraduate Program in Genetics and Molecular Biology
| | | | | | - Daniela Campagnol
- Unidade de Experimentação Animal; Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Marta Cioato
- Unidade de Experimentação Animal; Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Tuane Nerissa Alves Garcez
- Unidade de Experimentação Animal; Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | | | - Ursula Matte
- Gene Therapy Center.,Postgraduate Program in Genetics and Molecular Biology
| | - Guilherme Baldo
- Gene Therapy Center.,Postgraduate Program in Genetics and Molecular Biology.,Postgraduate Program in Physiology; Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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2
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Ko Y, Jeong YH, Lee JA. Transplantation of human umbilical cord blood CD34 + cells into the liver of newborn NOD/SCID/IL-2Rγ null (NSG) mice after busulfan conditioning. Blood Res 2017; 52:316-319. [PMID: 29333410 PMCID: PMC5762744 DOI: 10.5045/br.2017.52.4.316] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 04/05/2017] [Accepted: 06/15/2017] [Indexed: 11/17/2022] Open
Affiliation(s)
- Yunmi Ko
- Division of Clinical Translational Research, Korea Cancer Center Hospital, Seoul, Korea
| | - Yeon Ho Jeong
- Department of Medical Biotechnology, College of Biomedical Science, Kangwon National University, Chuncheon, Korea
| | - Jun Ah Lee
- Division of Clinical Translational Research, Korea Cancer Center Hospital, Seoul, Korea.,Department of Pediatrics, Korea Cancer Center Hospital, Seoul, Korea
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3
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Navarro-Montero O, Ayllon V, Lamolda M, López-Onieva L, Montes R, Bueno C, Ng E, Guerrero-Carreno X, Romero T, Romero-Moya D, Stanley E, Elefanty A, Ramos-Mejia V, Menendez P, Real PJ. RUNX1c Regulates Hematopoietic Differentiation of Human Pluripotent Stem Cells Possibly in Cooperation with Proinflammatory Signaling. Stem Cells 2017; 35:2253-2266. [PMID: 28869683 DOI: 10.1002/stem.2700] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 07/19/2017] [Accepted: 08/02/2017] [Indexed: 02/07/2023]
Abstract
Runt-related transcription factor 1 (Runx1) is a master hematopoietic transcription factor essential for hematopoietic stem cell (HSC) emergence. Runx1-deficient mice die during early embryogenesis due to the inability to establish definitive hematopoiesis. Here, we have used human pluripotent stem cells (hPSCs) as model to study the role of RUNX1 in human embryonic hematopoiesis. Although the three RUNX1 isoforms a, b, and c were induced in CD45+ hematopoietic cells, RUNX1c was the only isoform induced in hematoendothelial progenitors (HEPs)/hemogenic endothelium. Constitutive expression of RUNX1c in human embryonic stem cells enhanced the appearance of HEPs, including hemogenic (CD43+) HEPs and promoted subsequent differentiation into blood cells. Conversely, specific deletion of RUNX1c dramatically reduced the generation of hematopoietic cells from HEPs, indicating that RUNX1c is a master regulator of human hematopoietic development. Gene expression profiling of HEPs revealed a RUNX1c-induced proinflammatory molecular signature, supporting previous studies demonstrating proinflammatory signaling as a regulator of HSC emergence. Collectively, RUNX1c orchestrates hematopoietic specification of hPSCs, possibly in cooperation with proinflammatory signaling. Stem Cells 2017;35:2253-2266.
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Affiliation(s)
- Oscar Navarro-Montero
- Gene Regulation, Stem Cells and Development Group, Department of Genomic Oncology, GENYO: Centre for Genomics and Oncological Research Pfizer-University of Granada-Junta de Andalucía, PTS Granada, Granada, Spain
| | - Veronica Ayllon
- Gene Regulation, Stem Cells and Development Group, Department of Genomic Oncology, GENYO: Centre for Genomics and Oncological Research Pfizer-University of Granada-Junta de Andalucía, PTS Granada, Granada, Spain
| | - Mar Lamolda
- Gene Regulation, Stem Cells and Development Group, Department of Genomic Oncology, GENYO: Centre for Genomics and Oncological Research Pfizer-University of Granada-Junta de Andalucía, PTS Granada, Granada, Spain.,Department of Biochemistry and Molecular Biology I, Faculty of Science, University of Granada, Granada, Spain
| | - Lourdes López-Onieva
- Gene Regulation, Stem Cells and Development Group, Department of Genomic Oncology, GENYO: Centre for Genomics and Oncological Research Pfizer-University of Granada-Junta de Andalucía, PTS Granada, Granada, Spain
| | - Rosa Montes
- Gene Regulation, Stem Cells and Development Group, Department of Genomic Oncology, GENYO: Centre for Genomics and Oncological Research Pfizer-University of Granada-Junta de Andalucía, PTS Granada, Granada, Spain
| | - Clara Bueno
- Josep Carreras Leukemia Research Institute and Biomedicine Department, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Elizabeth Ng
- Blood Cell Development and Disease Laboratory, Murdoch Childrens Research Institute. The Royal Children's Hospital, Parkville, Australia
| | - Xiomara Guerrero-Carreno
- Gene Regulation, Stem Cells and Development Group, Department of Genomic Oncology, GENYO: Centre for Genomics and Oncological Research Pfizer-University of Granada-Junta de Andalucía, PTS Granada, Granada, Spain
| | - Tamara Romero
- Gene Regulation, Stem Cells and Development Group, Department of Genomic Oncology, GENYO: Centre for Genomics and Oncological Research Pfizer-University of Granada-Junta de Andalucía, PTS Granada, Granada, Spain
| | - Damià Romero-Moya
- Josep Carreras Leukemia Research Institute and Biomedicine Department, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Ed Stanley
- Stem Cell Technology Laboratory, Murdoch Childrens Research Institute. The Royal Children's Hospital, Parkville, Australia
| | - Andrew Elefanty
- Blood Cell Development and Disease Laboratory, Murdoch Childrens Research Institute. The Royal Children's Hospital, Parkville, Australia
| | - Verónica Ramos-Mejia
- Gene Regulation, Stem Cells and Development Group, Department of Genomic Oncology, GENYO: Centre for Genomics and Oncological Research Pfizer-University of Granada-Junta de Andalucía, PTS Granada, Granada, Spain
| | - Pablo Menendez
- Josep Carreras Leukemia Research Institute and Biomedicine Department, School of Medicine, University of Barcelona, Barcelona, Spain.,Instituciò Catalana de Reserca i EstudisAvançats (ICREA), Barcelona, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), ISCIII, Barcelona, Spain
| | - Pedro J Real
- Gene Regulation, Stem Cells and Development Group, Department of Genomic Oncology, GENYO: Centre for Genomics and Oncological Research Pfizer-University of Granada-Junta de Andalucía, PTS Granada, Granada, Spain.,Department of Biochemistry and Molecular Biology I, Faculty of Science, University of Granada, Granada, Spain
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4
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Prieto C, Stam RW, Agraz-Doblas A, Ballerini P, Camos M, Castaño J, Marschalek R, Bursen A, Varela I, Bueno C, Menendez P. Activated KRAS Cooperates with MLL-AF4 to Promote Extramedullary Engraftment and Migration of Cord Blood CD34+ HSPC But Is Insufficient to Initiate Leukemia. Cancer Res 2016; 76:2478-89. [PMID: 26837759 DOI: 10.1158/0008-5472.can-15-2769] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 01/08/2016] [Indexed: 11/16/2022]
Abstract
The MLL-AF4 (MA4) fusion gene is the genetic hallmark of an aggressive infant pro-B-acute lymphoblastic leukemia (B-ALL). Our understanding of MA4-mediated transformation is very limited. Whole-genome sequencing studies revealed a silent mutational landscape, which contradicts the aggressive clinical outcome of this hematologic malignancy. Only RAS mutations were recurrently detected in patients and found to be associated with poorer outcome. The absence of MA4-driven B-ALL models further questions whether MA4 acts as a single oncogenic driver or requires cooperating mutations to manifest a malignant phenotype. We explored whether KRAS activation cooperates with MA4 to initiate leukemia in cord blood-derived CD34(+) hematopoietic stem/progenitor cells (HSPC). Clonogenic and differentiation/proliferation assays demonstrated that KRAS activation does not cooperate with MA4 to immortalize CD34(+) HSPCs. Intrabone marrow transplantation into immunodeficient mice further showed that MA4 and KRAS(G12V) alone or in combination enhanced hematopoietic repopulation without impairing myeloid-lymphoid differentiation, and that mutated KRAS did not cooperate with MA4 to initiate leukemia. However, KRAS activation enhanced extramedullary hematopoiesis of MA4-expressing cell lines and CD34(+) HSPCs that was associated with leukocytosis and central nervous system infiltration, both hallmarks of infant t(4;11)(+) B-ALL. Transcriptional profiling of MA4-expressing patients supported a cell migration gene signature underlying the mutant KRAS-mediated phenotype. Collectively, our findings demonstrate that KRAS affects the homeostasis of MA4-expressing HSPCs, suggesting that KRAS activation in MA4(+) B-ALL is important for tumor maintenance rather than initiation. Cancer Res; 76(8); 2478-89. ©2016 AACR.
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Affiliation(s)
- Cristina Prieto
- Josep Carreras Leukemia Research Institute and Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Ronald W Stam
- Pediatric Oncology/Hematology, Erasmus MC-Sophia Children's Hospital, Rotterdam, the Netherlands
| | - Antonio Agraz-Doblas
- Josep Carreras Leukemia Research Institute and Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona, Spain. Institute of Biomedicine and Biotechnology of Cantabria (IBBTEC-CSIC-UNIVERSIDAD DE CANTABRIA-SODERCAN), Santander, Spain
| | - Paola Ballerini
- Pediatric Hematology Department, A. Trousseau Hospital, Paris, France
| | - Mireia Camos
- Hematology Laboratory, Hospital Sant Joan de Deu, Barcelona, Spain
| | - Julio Castaño
- Josep Carreras Leukemia Research Institute and Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Rolf Marschalek
- Institute Pharmaceutical Biology, Goethe-University, Frankfurt/Main, Germany
| | - Aldeheid Bursen
- Institute Pharmaceutical Biology, Goethe-University, Frankfurt/Main, Germany
| | - Ignacio Varela
- Institute of Biomedicine and Biotechnology of Cantabria (IBBTEC-CSIC-UNIVERSIDAD DE CANTABRIA-SODERCAN), Santander, Spain
| | - Clara Bueno
- Josep Carreras Leukemia Research Institute and Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona, Spain.
| | - Pablo Menendez
- Josep Carreras Leukemia Research Institute and Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona, Spain. Instituciò Catalana Recerca i Estudis Avançats (ICREA), Barcelona, Spain.
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5
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Sanjuan-Pla A, Romero-Moya D, Prieto C, Bueno C, Bigas A, Menendez P. Intra-Bone Marrow Transplantation Confers Superior Multilineage Engraftment of Murine Aorta-Gonad Mesonephros Cells Over Intravenous Transplantation. Stem Cells Dev 2016; 25:259-65. [PMID: 26603126 DOI: 10.1089/scd.2015.0309] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Hematopoietic stem cell (HSC) engraftment has been achieved using single-cell transplantation of prospectively highly purified adult HSC populations. However, bulk transplants are still performed when assessing the HSC potential of early embryonic hematopoietic tissues such as the aorta-gonad mesonephros (AGM) due to very low HSC activity content early in development. Intra-bone marrow transplantation (IBMT) has emerged as a superior administration route over intravenous (IV) transplantation for assessing the reconstituting ability of human HSCs in the xenotransplant setting since it bypasses the requirement for homing to the BM. In this study, we compared the ability of IBMT and IV administration of embryonic day 11.5 AGM-derived cells to reconstitute the hematopoietic system of myeloablated recipients. IBMT resulted in higher levels of AGM HSC long-term multilineage engraftment in the peripheral blood, BM, spleen, and thymus of primary and secondary recipients, and in limiting dilution experiments. The administration route did not skew the multilineage contribution pattern, but IBMT conferred higher Lineage(-)Sca-1(+)c-kit(+) long-term engraftment, in line with the superior IBMT reconstitution. Therefore, IBMT represents a superior administration route to detect HSC activity from developmentally early sources with limited HSC activity content, such as the AGM.
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Affiliation(s)
- Alejandra Sanjuan-Pla
- 1 Josep Carreras Leukemia Research Institute and School of Medicine, University of Barcelona , Barcelona, Spain
| | - Damia Romero-Moya
- 1 Josep Carreras Leukemia Research Institute and School of Medicine, University of Barcelona , Barcelona, Spain
| | - Cristina Prieto
- 1 Josep Carreras Leukemia Research Institute and School of Medicine, University of Barcelona , Barcelona, Spain
| | - Clara Bueno
- 1 Josep Carreras Leukemia Research Institute and School of Medicine, University of Barcelona , Barcelona, Spain
| | - Anna Bigas
- 2 Program in Cancer Research, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM) , Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain
| | - Pablo Menendez
- 1 Josep Carreras Leukemia Research Institute and School of Medicine, University of Barcelona , Barcelona, Spain .,3 Institució Catalana de Recerca i Estudis Avançats (ICREA) , Barcelona, Spain
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6
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Chung YS, Son JK, Choi B, Park JB, Chang J, Kim SJ. Transplantation of human spleen into immunodeficient NOD/SCID IL2Rγ null mice generates humanized mice that improve functional B cell development. Clin Immunol 2015; 161:308-15. [DOI: 10.1016/j.clim.2015.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Revised: 08/23/2015] [Accepted: 09/01/2015] [Indexed: 11/16/2022]
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7
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Abstract
The molecular determinants regulating the specification of human embryonic stem cells (hESCs) into hematopoietic cells remain elusive. HOXA9 plays a relevant role in leukemogenesis and hematopoiesis. It is highly expressed in hematopoietic stem and progenitor cells (HSPCs) and is downregulated upon differentiation. Hoxa9-deficient mice display impaired hematopoietic development, and deregulation of HOXA9 expression is frequently associated with acute leukemia. Analysis of the genes differentially expressed in cord blood HSPCs vs hESC-derived HSPCs identified HOXA9 as the most downregulated gene in hESC-derived HSPCs, suggesting that expression levels of HOXA9 may be crucial for hematopoietic differentiation of hESC. Here we show that during hematopoietic differentiation of hESCs, HOXA9 expression parallels hematopoietic development, but is restricted to the hemogenic precursors (HEP) (CD31(+)CD34(+)CD45(-)), and diminishes as HEPs differentiate into blood cells (CD45(+)). Different gain-of-function and loss-of-function studies reveal that HOXA9 enhances hematopoietic differentiation of hESCs by specifically promoting the commitment of HEPs into primitive and total CD45(+) blood cells. Gene expression analysis suggests that nuclear factor-κB signaling could be collaborating with HOXA9 to increase hematopoietic commitment. However, HOXA9 on its own is not sufficient to confer in vivo long-term engraftment potential to hESC-hematopoietic derivatives, reinforcing the idea that additional molecular regulators are needed for the generation of definitive in vivo functional HSPCs from hESC.
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8
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Montes R, Ayllón V, Prieto C, Bursen A, Prelle C, Romero-Moya D, Real PJ, Navarro-Montero O, Chillón C, Marschalek R, Bueno C, Menendez P. Ligand-independent FLT3 activation does not cooperate with MLL-AF4 to immortalize/transform cord blood CD34+ cells. Leukemia 2013; 28:666-74. [PMID: 24240202 DOI: 10.1038/leu.2013.346] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 10/18/2013] [Accepted: 11/08/2013] [Indexed: 01/11/2023]
Abstract
MLL-AF4 fusion is hallmark in high-risk infant pro-B-acute lymphoblastic leukemia (pro-B-ALL). Our limited understanding of MLL-AF4-mediated transformation reflects the absence of human models reproducing this leukemia. Hematopoietic stem/progenitor cells (HSPCs) constitute likely targets for transformation. We previously reported that MLL-AF4 enhanced hematopoietic engraftment and clonogenic potential in cord blood (CB)-derived CD34+ HSPCs but was not sufficient for leukemogenesis, suggesting that additional oncogenic lesions are required for MLL-AF4-mediated transformation. MLL-AF4+ pro-B-ALL display enormous levels of FLT3, and occasionally FLT3-activating mutations, thus representing a candidate cooperating event in MLL-AF4+ pro-B-ALL. We have explored whether FLT3.TKD (tyrosine kinase domain) mutation or increased expression of FLT3.WT (wild type) cooperates with MLL-AF4 to immortalize/transform CB-CD34+ HSPCs. In vivo, FLT3.TKD/FLT3.WT alone, or in combination with MLL-AF4, enhances hematopoietic repopulating function of CB-CD34+ HSPCs without impairing migration or hematopoietic differentiation. None of the animals transplanted with MLL-AF4+FLT3.TKD/WT-CD34+ HSPCs showed any sign of disease after 16 weeks. In vitro, enforced expression of FLT3.TKD/FLT3.WT conveys a transient overexpansion of MLL-AF4-expressing CD34+ HSPCs associated to higher proportion of cycling cells coupled to lower apoptotic levels, but does not augment clonogenic potential nor confer stable replating. Together, FLT3 activation does not suffice to immortalize/transform MLL-AF4-expressing CB-CD34+ HSPCs, suggesting the need of alternative (epi)-genetic cooperating oncogenic lesions.
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Affiliation(s)
- R Montes
- GENYO, Centre for Genomics and Oncological Research: Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain
| | - V Ayllón
- GENYO, Centre for Genomics and Oncological Research: Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain
| | - C Prieto
- 1] GENYO, Centre for Genomics and Oncological Research: Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain [2] Faculty of Medicine, Department of Stem Cells, Development and Cancer, Cell Therapy Program of the University of Barcelona, Josep Carreras Leukemia Research Institute, Barcelona, Spain
| | - A Bursen
- Institute of Pharmaceutical Biology/ZAFES/DCAL, Goethe-University of Frankfurt, Biocenter, Frankfurt, Germany
| | - C Prelle
- Institute of Pharmaceutical Biology/ZAFES/DCAL, Goethe-University of Frankfurt, Biocenter, Frankfurt, Germany
| | - D Romero-Moya
- 1] GENYO, Centre for Genomics and Oncological Research: Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain [2] Faculty of Medicine, Department of Stem Cells, Development and Cancer, Cell Therapy Program of the University of Barcelona, Josep Carreras Leukemia Research Institute, Barcelona, Spain
| | - P J Real
- GENYO, Centre for Genomics and Oncological Research: Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain
| | - O Navarro-Montero
- GENYO, Centre for Genomics and Oncological Research: Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain
| | - C Chillón
- Hospital Universitario de Salamanca, Servicio de Hematología, Salamanca, Spain
| | - R Marschalek
- Institute of Pharmaceutical Biology/ZAFES/DCAL, Goethe-University of Frankfurt, Biocenter, Frankfurt, Germany
| | - C Bueno
- 1] GENYO, Centre for Genomics and Oncological Research: Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain [2] Faculty of Medicine, Department of Stem Cells, Development and Cancer, Cell Therapy Program of the University of Barcelona, Josep Carreras Leukemia Research Institute, Barcelona, Spain
| | - P Menendez
- 1] GENYO, Centre for Genomics and Oncological Research: Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain [2] Faculty of Medicine, Department of Stem Cells, Development and Cancer, Cell Therapy Program of the University of Barcelona, Josep Carreras Leukemia Research Institute, Barcelona, Spain [3] Instituciò Catalana de Reserca i Estudis Avançats (ICREA)
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9
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The role of RUNX1 isoforms in hematopoietic commitment of human pluripotent stem cells. Blood 2013; 121:5250-2. [PMID: 23813937 DOI: 10.1182/blood-2013-03-487587] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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10
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Romero-Moya D, Bueno C, Montes R, Navarro-Montero O, Iborra FJ, López LC, Martin M, Menendez P. Cord blood-derived CD34+ hematopoietic cells with low mitochondrial mass are enriched in hematopoietic repopulating stem cell function. Haematologica 2013; 98:1022-9. [PMID: 23349299 DOI: 10.3324/haematol.2012.079244] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The homeostasis of the hematopoietic stem/progenitor cell pool relies on a fine-tuned balance between self-renewal, differentiation and proliferation. Recent studies have proposed that mitochondria regulate these processes. Although recent work has contributed to understanding the role of mitochondria during stem cell differentiation, it remains unclear whether the mitochondrial content/function affects human hematopoietic stem versus progenitor function. We found that mitochondrial mass correlates strongly with mitochondrial membrane potential in CD34(+) hematopoietic stem/progenitor cells. We, therefore, sorted cord blood CD34(+) cells on the basis of their mitochondrial mass and analyzed the in vitro homeostasis and clonogenic potential as well as the in vivo repopulating potential of CD34(+) cells with high (CD34(+) Mito(High)) versus low (CD34(+) Mito(Low)) mitochondrial mass. The CD34(+) Mito(Low) fraction contained 6-fold more CD34(+)CD38(-) primitive cells and was enriched in hematopoietic stem cell function, as demonstrated by its significantly greater hematopoietic reconstitution potential in immuno-deficient mice. In contrast, the CD34(+) Mito(High) fraction was more enriched in hematopoietic progenitor function with higher in vitro clonogenic capacity. In vitro differentiation of CD34(+) Mito(Low) cells was significantly delayed as compared to that of CD34(+) Mito(High) cells. The eventual complete differentiation of CD34(+) Mito(Low) cells, which coincided with a robust expansion of the CD34(-) differentiated progeny, was accompanied by mitochondrial adaptation, as shown by significant increases in ATP production and expression of the mitochondrial genes ND1 and COX2. In conclusion, cord blood CD34(+) cells with low levels of mitochondrial mass are enriched in hematopoietic repopulating stem cell function whereas high levels of mitochondrial mass identify hematopoietic progenitors. A mitochondrial response underlies hematopoietic stem/progenitor cell differentiation and proliferation of lineage-committed CD34(-) cells.
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Affiliation(s)
- Damia Romero-Moya
- GENyO-Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Government, Granada, Spain
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