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Brown N, Finnon R, Finnon P, McCarron R, Cruz-Garcia L, O’Brien G, Herbert E, Scudamore CL, Morel E, Badie C. Spi1 R235C point mutation confers hypersensitivity to radiation-induced acute myeloid leukemia in mice. iScience 2023; 26:107530. [PMID: 37664628 PMCID: PMC10469541 DOI: 10.1016/j.isci.2023.107530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 03/03/2023] [Accepted: 07/28/2023] [Indexed: 09/05/2023] Open
Abstract
Ionizing radiation (IR) is a risk factor for acute myeloid leukemia (rAML). Murine rAMLs feature both hemizygous chromosome 2 deletions (Del2) and point mutations (R235) within the hematopoietic regulatory gene Spi1. We generated a heterozygous CBA Spi1 R235 mouse (CBASpm/+) which develops de novo AML with 100% incidence by ∼12 months old and shows a dose-dependent reduction in latency following X-irradiation. These effects are reduced on an AML-resistant C57Bl6 genetic background. CBASpm/Gfp reporter mice show increased Gfp expression, indicating compensation for Spm-induced Spi1 haploinsufficiency. Del2 is always detected in both de novo and rAMLs, indicating that biallelic Spi1 mutation is required for AML. CBASpm/+ mice show that a single Spm modification is sufficient for initiating AML development with complete penetrance, via the "two-hit" mechanism and this is accelerated by IR exposure. Similar SPI1/PU.1 polymorphisms in humans could potentially lead to enhanced susceptibility to IR following medical or environmental exposure.
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Affiliation(s)
- Natalie Brown
- Cancer Mechanisms and Biomarkers Group Radiation Effects Department, Radiation, Chemical and Environmental Hazards, UK Health Security Agency (UKHSA), Didcot OX11 ORQ, UK
| | - Rosemary Finnon
- Cancer Mechanisms and Biomarkers Group Radiation Effects Department, Radiation, Chemical and Environmental Hazards, UK Health Security Agency (UKHSA), Didcot OX11 ORQ, UK
| | - Paul Finnon
- Cancer Mechanisms and Biomarkers Group Radiation Effects Department, Radiation, Chemical and Environmental Hazards, UK Health Security Agency (UKHSA), Didcot OX11 ORQ, UK
| | - Roisin McCarron
- Cancer Mechanisms and Biomarkers Group Radiation Effects Department, Radiation, Chemical and Environmental Hazards, UK Health Security Agency (UKHSA), Didcot OX11 ORQ, UK
| | - Lourdes Cruz-Garcia
- Cancer Mechanisms and Biomarkers Group Radiation Effects Department, Radiation, Chemical and Environmental Hazards, UK Health Security Agency (UKHSA), Didcot OX11 ORQ, UK
| | - Grainne O’Brien
- Cancer Mechanisms and Biomarkers Group Radiation Effects Department, Radiation, Chemical and Environmental Hazards, UK Health Security Agency (UKHSA), Didcot OX11 ORQ, UK
| | | | | | - Edouard Morel
- Cancer Mechanisms and Biomarkers Group Radiation Effects Department, Radiation, Chemical and Environmental Hazards, UK Health Security Agency (UKHSA), Didcot OX11 ORQ, UK
| | - Christophe Badie
- Cancer Mechanisms and Biomarkers Group Radiation Effects Department, Radiation, Chemical and Environmental Hazards, UK Health Security Agency (UKHSA), Didcot OX11 ORQ, UK
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Klokov D, Applegate K, Badie C, Brede DA, Dekkers F, Karabulutoglu M, Le Y, Rutten EA, Lumniczky K, Gomolka M. International expert group collaboration for developing an adverse outcome pathway for radiation induced leukaemia. Int J Radiat Biol 2022; 98:1802-1815. [PMID: 36040845 DOI: 10.1080/09553002.2022.2117873] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
PURPOSE The concept of the adverse outcome pathway (AOP) has recently gained significant attention as to its potential for incorporation of mechanistic biological information into the assessment of adverse health outcomes following ionizing radiation (IR) exposure. This work is an account of the activities of an international expert group formed specifically to develop an AOP for IR-induced leukaemia. Group discussions were held during dedicated sessions at the international AOP workshop jointly organized by the MELODI (Multidisciplinary European Low Dose Initiative) and the ALLIANCE (European Radioecology Alliance) associations to consolidate knowledge into a number of biological key events causally linked by key event relationships and connecting a molecular initiating event with the adverse outcome. Further knowledge review to generate a weight of evidence support for the Key Event Relationships (KERs) was undertaken using a systematic review approach. CONCLUSIONS An AOP for IR-induced acute myeloid leukaemia was proposed and submitted for review to the OECD-curated AOP-wiki (aopwiki.org). The systematic review identified over 500 studies that link IR, as a stressor, to leukaemia, as an adverse outcome. Knowledge gap identification, although requiring a substantial effort via systematic review of literature, appears to be one of the major added values of the AOP concept. Further work, both within this leukaemia AOP working group and other similar working groups, is warranted and is anticipated to produce highly demanded products for the radiation protection research community.
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Affiliation(s)
- Dmitry Klokov
- Laboratory of Experimental Radiotoxicology and Radiobiology, Institute for Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France.,Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Canada
| | - Kimberly Applegate
- Department of Radiology, University of Kentucky College of Medicine (retired), Lexington, KY, USA
| | - Christophe Badie
- Cancer Mechanisms and Biomarkers group, Department of Radiation Effects, Radiation, Chemical and Environmental, UK Health Security Agency, Oxfordshire, United Kingdom
| | - Dag Anders Brede
- Centre for Environmental Radioactivity (CERAD), Faculty of Environmental Sciences and Natural Resource Management (MINA), Norwegian University of Life Sciences (NMBU), Norway
| | - Fieke Dekkers
- Mathematical Institute, Utrecht University, Utrecht, The Netherlands.,Netherlands National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Melis Karabulutoglu
- Cancer Mechanisms and Biomarkers group, Department of Radiation Effects, Radiation, Chemical and Environmental, UK Health Security Agency, Oxfordshire, United Kingdom
| | | | - Eric Andreas Rutten
- Cancer Mechanisms and Biomarkers group, Department of Radiation Effects, Radiation, Chemical and Environmental, UK Health Security Agency, Oxfordshire, United Kingdom
| | - Katalin Lumniczky
- Radiation Biology, Federal Office for Radiation Protection BfS, Oberschleißheim, Germany
| | - Maria Gomolka
- Unit of Radiation Medicine, Department of Radiobiology and Radiohygiene, National Public Health Centre, Budapest, Hungary
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3
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Gault N, Verbiest T, Badie C, Romeo PH, Bouffler S. Hematopoietic stem and progenitor cell responses to low radiation doses - implications for leukemia risk. Int J Radiat Biol 2019; 95:892-899. [PMID: 30652952 DOI: 10.1080/09553002.2019.1569777] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Studies of the responses of hematopoietic stem and progenitor cells (HSPCs) to low doses of ionizing radiation formed an important aspect of the RISK-IR project ( www.risk-ir.eu ). A brief overview of these studies is presented here. The findings confirm the sensitivity of HSPCs to radiation even at low doses, and illustrate the substantial impact that differentiation state has upon cell sensitivity. The work provides mechanistic support for epidemiological findings of leukemia risk at dose levels used in diagnostic CT imaging, and further suggests that low-dose irradiation may facilitate bone marrow transplantation, a finding that could lead to refinements in clinical practice.
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Affiliation(s)
- Nathalie Gault
- a CEA/DRF/IBFJ/iRCM/LRTS , Fontenay-aux-Roses Cedex , France.,b Inserm U967 , Fontenay-aux-Roses Cedex , France.,c CEA/DRF/IBFJ/iRCM/LRTS-U1274 Inserm-Université Paris-Diderot , Paris , France.,d CEA/DRF/IBFJ/iRCM/LRTS-U1274 Inserm-Université Paris-Sud , Paris , France
| | - Tom Verbiest
- e Public Health England , Centre for Radiation, Chemical and Environmental Hazards , Oxfordshire , UK
| | - Christophe Badie
- e Public Health England , Centre for Radiation, Chemical and Environmental Hazards , Oxfordshire , UK
| | - Paul-Henri Romeo
- a CEA/DRF/IBFJ/iRCM/LRTS , Fontenay-aux-Roses Cedex , France.,b Inserm U967 , Fontenay-aux-Roses Cedex , France.,c CEA/DRF/IBFJ/iRCM/LRTS-U1274 Inserm-Université Paris-Diderot , Paris , France.,d CEA/DRF/IBFJ/iRCM/LRTS-U1274 Inserm-Université Paris-Sud , Paris , France
| | - Simon Bouffler
- e Public Health England , Centre for Radiation, Chemical and Environmental Hazards , Oxfordshire , UK
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4
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Tracking preleukemic cells in vivo to reveal the sequence of molecular events in radiation leukemogenesis. Leukemia 2018; 32:1435-1444. [PMID: 29556020 PMCID: PMC5990525 DOI: 10.1038/s41375-018-0085-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 02/05/2018] [Accepted: 02/06/2018] [Indexed: 12/16/2022]
Abstract
Epidemiological studies have demonstrated an increased leukemia incidence following ionizing radiation exposure, but to date, the target cells and underlying mechanisms of radiation leukemogenesis remain largely unidentified. We engineered a mouse model carrying a different fluorescent marker on each chromosome 2, located inside the minimum deleted region occurring after radiation exposure and recognized as the first leukemogenic event. Using this tailored model, we report that following radiation exposure, more than half of asymptomatic CBA Sfpi1GFP/mCh mice presented with expanding clones of preleukemic hematopoietic cells harboring a hemizygous interstitial deletion of chromosome 2. Moreover, following isolation of preleukemic hematopoietic stem and progenitor cells irradiated in their native microenvironment, we identified the presence of Sfpi1 point mutations within a subpopulation of these preleukemic cells expanding rapidly (increasing from 6% to 55% in 21 days in peripheral blood in one case), hence identifying for the first time the presence of such cells within a living animal. Importantly, we also report a previously undescribed gender difference in the phenotype of the preleukemic cells and leukemia, suggesting a gender imbalance in the radiation-induced leukemic target cell. In conclusion, we provide novel insights into the sequence of molecular events occurring during the (radiation-induced) leukemic clonal evolution.
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5
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Badie C, Blachowicz A, Barjaktarovic Z, Finnon R, Michaux A, Sarioglu H, Brown N, Manning G, Benotmane MA, Tapio S, Polanska J, Bouffler SD. Transcriptomic and proteomic analysis of mouse radiation-induced acute myeloid leukaemia (AML). Oncotarget 2018; 7:40461-40480. [PMID: 27250028 PMCID: PMC5130020 DOI: 10.18632/oncotarget.9626] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 05/09/2016] [Indexed: 01/06/2023] Open
Abstract
A combined transcriptome and proteome analysis of mouse radiation-induced AMLs using two primary AMLs, cell lines from these primaries, another cell line and its in vivo passage is reported. Compared to haematopoietic progenitor and stem cells (HPSC), over 5000 transcriptome alterations were identified, 2600 present in all materials. 55 and 3 alterations were detected in the proteomes of the cell lines and primary/in vivo passage material respectively, with one common to all materials. In cell lines, approximately 50% of the transcriptome changes are related to adaptation to cell culture, and in the proteome this proportion was higher. An AML 'signature' of 17 genes/proteins commonly deregulated in primary AMLs and cell lines compared to HPSCs was identified and validated using human AML transcriptome data. This also distinguishes primary AMLs from cell lines and includes proteins such as Coronin 1, pontin/RUVBL1 and Myeloperoxidase commonly implicated in human AML. C-Myc was identified as having a key role in radiation leukaemogenesis. These data identify novel candidates relevant to mouse radiation AML pathogenesis, and confirm that pathways of leukaemogenesis in the mouse and human share substantial commonality.
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Affiliation(s)
- Christophe Badie
- Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, UK
| | - Agnieszka Blachowicz
- Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Techology, Gliwice, Poland
| | - Zarko Barjaktarovic
- Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Radiation Proteomics Group, Institute of Radiation Biology, Neuherberg, Germany
| | - Rosemary Finnon
- Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, UK
| | - Arlette Michaux
- Radiobiology Unit, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK•.CEN), Mol, Belgium
| | - Hakan Sarioglu
- Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Research Unit Protein Science, Neuherberg, Germany
| | - Natalie Brown
- Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, UK
| | - Grainne Manning
- Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, UK
| | - M Abderrafi Benotmane
- Radiobiology Unit, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK•.CEN), Mol, Belgium
| | - Soile Tapio
- Helmholtz Zentrum München, German Research Center for Environmental Health GmbH, Radiation Proteomics Group, Institute of Radiation Biology, Neuherberg, Germany
| | - Joanna Polanska
- Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Techology, Gliwice, Poland
| | - Simon D Bouffler
- Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, UK
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Sive JI, Basilico S, Hannah R, Kinston SJ, Calero-Nieto FJ, Göttgens B. Genome-scale definition of the transcriptional programme associated with compromised PU.1 activity in acute myeloid leukaemia. Leukemia 2016; 30:14-23. [PMID: 26126967 PMCID: PMC4705427 DOI: 10.1038/leu.2015.172] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 05/15/2015] [Accepted: 06/15/2015] [Indexed: 11/09/2022]
Abstract
Transcriptional dysregulation is associated with haematological malignancy. Although mutations of the key haematopoietic transcription factor PU.1 are rare in human acute myeloid leukaemia (AML), they are common in murine models of radiation-induced AML, and PU.1 downregulation and/or dysfunction has been described in human AML patients carrying the fusion oncogenes RUNX1-ETO and PML-RARA. To study the transcriptional programmes associated with compromised PU.1 activity, we adapted a Pu.1-mutated murine AML cell line with an inducible wild-type PU.1. PU.1 induction caused transition from leukaemia phenotype to monocytic differentiation. Global binding maps for PU.1, CEBPA and the histone mark H3K27Ac with and without PU.1 induction showed that mutant PU.1 retains DNA-binding ability, but the induction of wild-type protein dramatically increases both the number and the height of PU.1-binding peaks. Correlating chromatin immunoprecipitation (ChIP) Seq with gene expression data, we found that PU.1 recruitment coupled with increased histone acetylation induces gene expression and activates a monocyte/macrophage transcriptional programme. PU.1 induction also caused the reorganisation of a subgroup of CEBPA binding peaks. Finally, we show that the PU.1 target gene set defined in our model allows the stratification of primary human AML samples, shedding light on both known and novel AML subtypes that may be driven by PU.1 dysfunction.
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Affiliation(s)
- J I Sive
- Department of Haematology, Cambridge Institute for Medical Research and Wellcome Trust and MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - S Basilico
- Department of Haematology, Cambridge Institute for Medical Research and Wellcome Trust and MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - R Hannah
- Department of Haematology, Cambridge Institute for Medical Research and Wellcome Trust and MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - S J Kinston
- Department of Haematology, Cambridge Institute for Medical Research and Wellcome Trust and MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - F J Calero-Nieto
- Department of Haematology, Cambridge Institute for Medical Research and Wellcome Trust and MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - B Göttgens
- Department of Haematology, Cambridge Institute for Medical Research and Wellcome Trust and MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
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7
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Influence of radiation quality on mouse chromosome 2 deletions in radiation-induced acute myeloid leukaemia. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2015; 793:48-54. [DOI: 10.1016/j.mrgentox.2015.07.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 07/23/2015] [Indexed: 01/21/2023]
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8
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Verbiest T, Bouffler S, Nutt SL, Badie C. PU.1 downregulation in murine radiation-induced acute myeloid leukaemia (AML): from molecular mechanism to human AML. Carcinogenesis 2015; 36:413-9. [PMID: 25750172 PMCID: PMC4392607 DOI: 10.1093/carcin/bgv016] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 02/24/2015] [Indexed: 01/06/2023] Open
Abstract
The transcription factor PU.1, encoded by the murine Sfpi1 gene (SPI1 in humans), is a member of the Ets transcription factor family and plays a vital role in commitment and maturation of the myeloid and lymphoid lineages. Murine studies directly link primary acute myeloid leukaemia (AML) and decreased PU.1 expression in specifically modified strains. Similarly, a radiation-induced chromosome 2 deletion and subsequent Sfpi1 point mutation in the remaining allele lead to murine radiation-induced AML. Consistent with murine data, heterozygous deletion of the SPI1 locus and mutation of the −14kb SPI1 upstream regulatory element were described previously in human primary AML, although they are rare events. Other mechanisms linked to PU.1 downregulation in human AML include TP53 deletion, FLT3-ITD mutation and the recurrent AML1-ETO [t(8;21)] and PML-RARA [t(15;17)] translocations. This review provides an up-to-date overview on our current understanding of the involvement of PU.1 in the initiation and development of radiation-induced AML, together with recommendations for future murine and human studies.
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Affiliation(s)
- Tom Verbiest
- Biological Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 ORQ, UK, CRUK & MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
| | - Simon Bouffler
- Biological Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 ORQ, UK
| | - Stephen L Nutt
- Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3052, Australia and Department of Medical Biology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Christophe Badie
- Biological Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 ORQ, UK,
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9
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Olme CH, Finnon R, Brown N, Kabacik S, Bouffler S, Badie C. Live cell detection of chromosome 2 deletion and Sfpi1/PU1 loss in radiation-induced mouse acute myeloid leukaemia. Leuk Res 2013; 37:1374-82. [PMID: 23806234 PMCID: PMC3775122 DOI: 10.1016/j.leukres.2013.05.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 05/24/2013] [Accepted: 05/26/2013] [Indexed: 12/20/2022]
Abstract
The CBA/H mouse model of radiation-induced acute myeloid leukaemia (rAML) has been studied for decades to bring to light the molecular mechanisms associated with multistage carcinogenesis. A specific interstitial deletion of chromosome 2 found in a high proportion of rAML is recognised as the initiating event. The deletion leads to the loss of Sfpi, a gene essential for haematopoietic development. Its product, the transcription factor PU.1 acts as a tumour suppressor in this model. Although the deletion can be detected early following ionising radiation exposure by cytogenetic techniques, precise characterisation of the haematopoietic cells carrying the deletion and the study of their fate in vivo cannot be achieved. Here, using a genetically engineered C57BL/6 mouse model expressing the GFP fluorescent molecule under the control of the Sfpi1 promoter, which we have bred onto the rAML-susceptible CBA/H strain, we demonstrate that GFP expression did not interfere with X-ray induced leukaemia incidence and that GFP fluorescence in live leukaemic cells is a surrogate marker of radiation-induced chromosome 2 deletions with or without point mutations on the remaining allele of the Sfpi1 gene. This study presents the first experimental evidence for the detection of this leukaemia initiating event in live leukemic cells.
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MESH Headings
- Animals
- Bone Marrow Cells/metabolism
- Bone Marrow Cells/pathology
- Chromosome Deletion
- Disease Models, Animal
- Exons
- Female
- Flow Cytometry
- Gene Deletion
- Gene Expression
- Genes, Reporter
- Genetic Predisposition to Disease
- Immunophenotyping
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/mortality
- Leukemia, Radiation-Induced/genetics
- Leukemia, Radiation-Induced/metabolism
- Mice
- Mutation
- Proto-Oncogene Proteins/genetics
- Trans-Activators/genetics
- Transcription, Genetic
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Affiliation(s)
| | | | | | | | | | - C. Badie
- Biological Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Didcot, Oxfordshire, UK
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