1
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Liu L, Liu A, Liu X. PRRX2 predicts poor survival prognosis, and promotes malignant phenotype of lung adenocarcinoma via transcriptional activates PSMD1. Transl Oncol 2022; 27:101586. [PMID: 36379103 PMCID: PMC9661514 DOI: 10.1016/j.tranon.2022.101586] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 10/26/2022] [Accepted: 11/08/2022] [Indexed: 11/13/2022] Open
Abstract
INTRODUCTION Paired-related homeobox transcription factor 2 (PRRX2) has been proved involves in the pathogenesis of tumors, but the role of PRRX2 in lung adenocarcinoma (LUAD) is basically not clear. MATERIALS AND METHODS LUAD datasets were obtained from Gene Expression Omnibus datasets. Functional enrichment analyses were performed based on R language. Several online analysis tools were used for PRRX2 expression, survival curves, and immune cell infiltration analyses. CCK-8, flow cytometry assays were used to detect the cell proliferation and apoptosis. Dual luciferase reporter system and chromatin immunoprecipitation were used to explore the interaction of PRRX2 and Proteasome 26S subunit, non-ATPases 1 (PSMD1). Xenograft in nude mice was used to assess the function of PRRX2 regulation in vivo. RESULTS AND DISCUSSION Bioinformatics analyses found that PRRX2 was highly expressed in LUAD tissues and the high PRRX2 expression had a poor prognostic value. PRRX2 was highly expressed in LUAD clinical samples and cell lines. PRRX2 acted as a positive regulator of cell proliferation and a negative regulator of apoptosis. PRRX2 could bind with the PSMD1 promoter and regulate PSMD1 expression, thereby affected LUAD cells' malignant phenotype. Result of xenografts in nude mice confirmed that PRRX2 promotes LUAD tumor growth in vivo. Summary, our study results reveal the crucial roles for PRRX2 in the proliferation and apoptosis of LUAD progression and suggest that PRRX2 may regulate PSMD1 expression by combining with the PSMD1 promoter, thereby participating in the malignant behavior of LUAD.
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Affiliation(s)
- Lihua Liu
- School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China,Department of Respiratory Medicine, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Aihua Liu
- Department of General Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
| | - Xuezheng Liu
- School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi, China,Corresponding author.
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2
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Michmerhuizen NL, Klco JM, Mullighan CG. Mechanistic insights and potential therapeutic approaches for NUP98-rearranged hematologic malignancies. Blood 2020; 136:2275-2289. [PMID: 32766874 PMCID: PMC7702474 DOI: 10.1182/blood.2020007093] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 07/21/2020] [Indexed: 12/15/2022] Open
Abstract
Nucleoporin 98 (NUP98) fusion oncoproteins are observed in a spectrum of hematologic malignancies, particularly pediatric leukemias with poor patient outcomes. Although wild-type full-length NUP98 is a member of the nuclear pore complex, the chromosomal translocations leading to NUP98 gene fusions involve the intrinsically disordered and N-terminal region of NUP98 with over 30 partner genes. Fusion partners include several genes bearing homeodomains or having known roles in transcriptional or epigenetic regulation. Based on data in both experimental models and patient samples, NUP98 fusion oncoprotein-driven leukemogenesis is mediated by changes in chromatin structure and gene expression. Multiple cofactors associate with NUP98 fusion oncoproteins to mediate transcriptional changes possibly via phase separation, in a manner likely dependent on the fusion partner. NUP98 gene fusions co-occur with a set of additional mutations, including FLT3-internal tandem duplication and other events contributing to increased proliferation. To improve the currently dire outcomes for patients with NUP98-rearranged malignancies, therapeutic strategies have been considered that target transcriptional and epigenetic machinery, cooperating alterations, and signaling or cell-cycle pathways. With the development of more faithful experimental systems and continued study, we anticipate great strides in our understanding of the molecular mechanisms and therapeutic vulnerabilities at play in NUP98-rearranged models. Taken together, these studies should lead to improved clinical outcomes for NUP98-rearranged leukemia.
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Affiliation(s)
| | - Jeffery M Klco
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
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3
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Acute myeloid leukemia with a cryptic NUP98/PRRX2 rearrangement developing after low-dose methotrexate therapy for rheumatoid arthritis. Ann Hematol 2019; 98:2841-2843. [PMID: 31728617 DOI: 10.1007/s00277-019-03838-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 10/28/2019] [Indexed: 01/25/2023]
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4
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Chai WX, Sun LG, Dai FH, Shao HS, Zheng NG, Cai HY. Inhibition of PRRX2 suppressed colon cancer liver metastasis via inactivation of Wnt/β-catenin signaling pathway. Pathol Res Pract 2019; 215:152593. [PMID: 31471104 DOI: 10.1016/j.prp.2019.152593] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 07/23/2019] [Accepted: 08/09/2019] [Indexed: 02/07/2023]
Abstract
The aim of this study was to investigate whether PRRX2 may regulate the liver metastasis of colon cancer via the Wnt/β-catenin signaling pathway. PRRX2 and β-catenin in patients with the liver metastases of colon cancer was detected by immunochemistry. Colon cancer cells (CT-26 and CMT93) were divided into Normal, si-Ctrl, si-PRRX2 and si-PRRX2 +LiCl groups. Cell invasive and migrating abilities and the related proteins were detected. Liver-metastatic mice model was constructed consisting of Normal, NC shRNA and PRRX2 shRNA groups to examine the function of PRRX2 shRNA on liver metastasis. We found that PRRX2 and β-catenin positive rate was elevated in colon cancer tissues, especially in those tissues with liver metastasis, and there was a close relation between PRRX2 and the clinical staging, lymph node metastasis and numbers of liver metastases of colon cancer patients with liver metastasis. In vitro, the invasive and migrating abilities of CT-26 and CMT93 cells decreased apparently in the si-PRRX2 group, with down-regulation of PRRX2, p-GSK3βSer9/GSK3β, nucleus and cytoplasm β-catenin, TCF4 and Vimentin but up-regulation of E-cadherin. However, LiCl, the Wnt/β-catenin pathway activator, can reverse the inhibitory effect of si-PRRX2 on invasive and migrating ability of colon cancer cells. In vivo, the volume and weight of transplanted tumor and the number of liver metastases in the PRRX2 shRNA group were significantly reduced, with the similar protein expression patterns as in vitro. In a word, PRRX2 inhibition may reduce invasive and migrating abilities to hinder epithelial-mesenchymal transition (EMT), and suppress colon cancer liver metastasis through inactivation of Wnt/β-catenin pathway.
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Affiliation(s)
- Wen-Xiao Chai
- Department of Interventional Oncology, Gansu Provincial People's Hospital, Lanzhou 730000, Gansu, China
| | - Li-Guo Sun
- Department of Surgical Oncology, Dingxi City People's Hospital, Dingxi 743000, Gansu, China
| | - Fu-Hong Dai
- Department of Interventional Oncology, Gansu Provincial People's Hospital, Lanzhou 730000, Gansu, China
| | - Hong-Sheng Shao
- Department of Radiology, Rehabilitation Center Hospital of Gansu Province, Lanzhou 730000, Gansu, China
| | - Ning-Gang Zheng
- Department of Interventional Oncology, Gansu Provincial People's Hospital, Lanzhou 730000, Gansu, China
| | - Hong-Yi Cai
- Department of Radiation oncology, Gansu Provincial People's Hospital, Lanzhou 730000, Gansu, China.
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5
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Lacambra MD, Weinreb I, Demicco EG, Chow C, Sung YS, Swanson D, To KF, Wong KC, Antonescu CR, Dickson BC. PRRX-NCOA1/2 rearrangement characterizes a distinctive fibroblastic neoplasm. Genes Chromosomes Cancer 2019; 58:705-712. [PMID: 31008539 DOI: 10.1002/gcc.22762] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 04/17/2019] [Accepted: 04/18/2019] [Indexed: 12/19/2022] Open
Abstract
Fibroblastic/myofibroblastic neoplasms represent a broad, and occasionally diagnostically challenging, category of soft tissue neoplasms. A subset of these tumors defy conventional classification. However, with the advent of next-generation sequencing, the identification of disease-defining molecular alterations is gradually improving their subclassification. Following identification of two index cases of a distinctive fibroblastic neoplasm with a fusion gene involving PRRX1 and NCOA1, we performed a retrospective review to further characterize this entity. We identified two additional cases, including one with a fusion between PRRX1 and NCOA2. The average patient age was 38 years, and three patients were female. Two tumors occurred on the neck, and the others involved the groin and thigh. Tumors were centered in the subcutis and ranged from 2.3 to 14.0 cm (average 5.8 cm). Morphologically, they were predominantly hypocellular, with focal hypercellularity. They were composed of monomorphic spindle-stellate cells with a vague fascicular pattern. The nuclei were bland with only rare mitotic activity, and occasional multinucleation. The intervening stroma was typically abundant and ranged from myxoid to collagenous, with frequent rope-like collagen bundles. Three of the cases had a prominent vasculature ranging from numerous small curvilinear vessels to ectatic and branching staghorn-like vessels. Immunohistochemistry was negative for desmin, smooth muscle actin, S100, CD34, keratin, and epithelial membrane antigen. Each of the patients was treated by simple excision and none of the tumors were associated with local recurrence or metastasis. Based on their unique morphological and molecular attributes, we believe this represents a novel fibroblastic tumor for which we have tentatively proposed the name "PRRX-NCOAx-rearranged fibroblastic tumor."
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Affiliation(s)
- Maribel D Lacambra
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Ilan Weinreb
- Department of Pathology, University Health Network, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Elizabeth G Demicco
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Department of Pathology and Laboratory Medicine, Mount Sinai Health System, Toronto, Ontario, Canada
| | - Chit Chow
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Yun-Shao Sung
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - David Swanson
- Department of Pathology, University Health Network, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Ka-Fai To
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Kwok-Chuen Wong
- Musculokeletal Oncology, Prince of Wales Hospital, Hong Kong, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Cristina R Antonescu
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Brendan C Dickson
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Department of Pathology and Laboratory Medicine, Mount Sinai Health System, Toronto, Ontario, Canada
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6
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Hsieh G, Bierman R, Szabo L, Lee AG, Freeman DE, Watson N, Sweet-Cordero EA, Salzman J. Statistical algorithms improve accuracy of gene fusion detection. Nucleic Acids Res 2017; 45:e126. [PMID: 28541529 PMCID: PMC5737606 DOI: 10.1093/nar/gkx453] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Accepted: 05/22/2017] [Indexed: 11/14/2022] Open
Abstract
Gene fusions are known to play critical roles in tumor pathogenesis. Yet, sensitive and specific algorithms to detect gene fusions in cancer do not currently exist. In this paper, we present a new statistical algorithm, MACHETE (Mismatched Alignment CHimEra Tracking Engine), which achieves highly sensitive and specific detection of gene fusions from RNA-Seq data, including the highest Positive Predictive Value (PPV) compared to the current state-of-the-art, as assessed in simulated data. We show that the best performing published algorithms either find large numbers of fusions in negative control data or suffer from low sensitivity detecting known driving fusions in gold standard settings, such as EWSR1-FLI1. As proof of principle that MACHETE discovers novel gene fusions with high accuracy in vivo, we mined public data to discover and subsequently PCR validate novel gene fusions missed by other algorithms in the ovarian cancer cell line OVCAR3. These results highlight the gains in accuracy achieved by introducing statistical models into fusion detection, and pave the way for unbiased discovery of potentially driving and druggable gene fusions in primary tumors.
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Affiliation(s)
- Gillian Hsieh
- Stanford University, Department of Biochemistry, 279 Campus Drive, Stanford, CA 94305, USA
| | - Rob Bierman
- Stanford University, Department of Biochemistry, 279 Campus Drive, Stanford, CA 94305, USA
| | - Linda Szabo
- Stanford University, Biomedical Informatics, 1265 Welch Road, MSOB, X-215, MC 5479, Stanford, CA 94305-5479, USA
| | - Alex Gia Lee
- Stanford University, Cancer Biology, 265 Campus Drive, Suite G2103, Stanford, CA 94305-5456, USA
| | - Donald E Freeman
- Stanford University, Department of Biochemistry, 279 Campus Drive, Stanford, CA 94305, USA
| | - Nathaniel Watson
- Stanford University, Department of Biochemistry, 279 Campus Drive, Stanford, CA 94305, USA
| | | | - Julia Salzman
- Stanford University, Department of Biochemistry, 279 Campus Drive, Stanford, CA 94305, USA.,Stanford University, Department of Biomedical Data Science, Stanford, CA 94305-5456, USA
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7
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Wu Q, Yu H, Fang X, Cheng Y, Dong L, Wei W, Wang G, Fu H, Liu S, Hao L. The association of haplotypes inIGFBP-3gene promoter region and tissue expressions in three pig breeds. Anim Cells Syst (Seoul) 2016. [DOI: 10.1080/19768354.2016.1253614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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8
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Juang YL, Jeng YM, Chen CL, Lien HC. PRRX2 as a novel TGF-β-induced factor enhances invasion and migration in mammary epithelial cell and correlates with poor prognosis in breast cancer. Mol Carcinog 2016; 55:2247-2259. [DOI: 10.1002/mc.22465] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 12/23/2015] [Accepted: 01/08/2016] [Indexed: 01/08/2023]
Affiliation(s)
- Yu-Lin Juang
- Graduate Institute of Pathology; National Taiwan University; Taipei Taiwan
| | - Yung-Ming Jeng
- Graduate Institute of Pathology; National Taiwan University; Taipei Taiwan
- Department of Pathology; National Taiwan University Hospital; Taipei Taiwan
| | - Chi-Long Chen
- Department of Pathology, College of Medicine; Taipei Medical University; Taipei Taiwan
- Department of Pathology; Taipei Medical University Hospital; Taipei Taiwan
| | - Huang-Chun Lien
- Graduate Institute of Pathology; National Taiwan University; Taipei Taiwan
- Department of Pathology; National Taiwan University Hospital; Taipei Taiwan
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9
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Abstract
Nuclear pore complexes (NPCs) are the sole gateways between the nucleus and the cytoplasm of eukaryotic cells and they mediate all macromolecular trafficking between these cellular compartments. Nucleocytoplasmic transport is highly selective and precisely regulated and as such an important aspect of normal cellular function. Defects in this process or in its machinery have been linked to various human diseases, including cancer. Nucleoporins, which are about 30 proteins that built up NPCs, are critical players in nucleocytoplasmic transport and have also been shown to be key players in numerous other cellular processes, such as cell cycle control and gene expression regulation. This review will focus on the three nucleoporins Nup98, Nup214, and Nup358. Common to them is their significance in nucleocytoplasmic transport, their multiple other functions, and being targets for chromosomal translocations that lead to haematopoietic malignancies, in particular acute myeloid leukaemia. The underlying molecular mechanisms of nucleoporin-associated leukaemias are only poorly understood but share some characteristics and are distinguished by their poor prognosis and therapy outcome.
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10
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Braekeleer ED, Douet-Guilbert N, Basinko A, Bris MJL, Morel F, Braekeleer MD. Hox gene dysregulation in acute myeloid leukemia. Future Oncol 2014; 10:475-95. [DOI: 10.2217/fon.13.195] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
ABSTRACT: In humans, class I homeobox genes (HOX genes) are distributed in four clusters. Upstream regulators include transcriptional activators and members of the CDX family of transcription factors. HOX genes encode proteins and need cofactor interactions, to increase their specificity and selectivity. HOX genes contribute to the organization and regulation of hematopoiesis by controlling the balance between proliferation and differentiation. Changes in HOX gene expression can be associated with chromosomal rearrangements generating fusion genes, such as those involving MLL and NUP98, or molecular defects, such as mutations in NPM1 and CEBPA for example. Several miRNAs are involved in the control of HOX gene expression and their expression correlates with HOX gene dysregulation. HOX genes dysregulation is a dominant mechanism of leukemic transformation. A better knowledge of their target genes and the mechanisms by which their dysregulated expression contributes to leukemogenesis could lead to the development of new drugs.
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Affiliation(s)
- Etienne De Braekeleer
- Laboratoire d’Histologie, Embryologie et Cytogénétique, Faculté de Médecine et des Sciences de la Santé, Université de Brest, Brest, France
| | - Nathalie Douet-Guilbert
- Laboratoire d’Histologie, Embryologie et Cytogénétique, Faculté de Médecine et des Sciences de la Santé, Université de Brest, Brest, France
| | - Audrey Basinko
- Laboratoire d’Histologie, Embryologie et Cytogénétique, Faculté de Médecine et des Sciences de la Santé, Université de Brest, Brest, France
| | - Marie-Josée Le Bris
- Service de Cytogénétique, Cytologie et Biologie de la Reproduction, Hôpital Morvan, CHRU Brest, Brest, France
| | - Frédéric Morel
- Laboratoire d’Histologie, Embryologie et Cytogénétique, Faculté de Médecine et des Sciences de la Santé, Université de Brest, Brest, France
| | - Marc De Braekeleer
- Laboratoire d’Histologie, Embryologie et Cytogénétique, Faculté de Médecine et des Sciences de la Santé, Université de Brest, Brest, France
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11
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Abstract
Structural chromosomal rearrangements of the Nucleoporin 98 gene (NUP98), primarily balanced translocations and inversions, are associated with a wide array of hematopoietic malignancies. NUP98 is known to be fused to at least 28 different partner genes in patients with hematopoietic malignancies, including acute myeloid leukemia, chronic myeloid leukemia in blast crisis, myelodysplastic syndrome, acute lymphoblastic leukemia, and bilineage/biphenotypic leukemia. NUP98 gene fusions typically encode a fusion protein that retains the amino terminus of NUP98; in this context, it is important to note that several recent studies have demonstrated that the amino-terminal portion of NUP98 exhibits transcription activation potential. Approximately half of the NUP98 fusion partners encode homeodomain proteins, and at least 5 NUP98 fusions involve known histone-modifying genes. Several of the NUP98 fusions, including NUP98-homeobox (HOX)A9, NUP98-HOXD13, and NUP98-JARID1A, have been used to generate animal models of both lymphoid and myeloid malignancy; these models typically up-regulate HOXA cluster genes, including HOXA5, HOXA7, HOXA9, and HOXA10. In addition, several of the NUP98 fusion proteins have been shown to inhibit differentiation of hematopoietic precursors and to increase self-renewal of hematopoietic stem or progenitor cells, providing a potential mechanism for malignant transformation.
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12
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Van de Vosse DW, Wan Y, Wozniak RW, Aitchison JD. Role of the nuclear envelope in genome organization and gene expression. WILEY INTERDISCIPLINARY REVIEWS-SYSTEMS BIOLOGY AND MEDICINE 2011; 3:147-66. [PMID: 21305702 DOI: 10.1002/wsbm.101] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Although often depicted as a static structure upon which proteinaceous factors bind to control gene expression, the genome is actually highly mobile and capable of exploring the complex domain architecture of the nucleus, which in turn controls genome maintenance and gene expression. Numerous genes relocate from the nuclear periphery to the nuclear interior upon activation and are hypothesized to interact with pre-assembled sites of transcription. In contrast to the nuclear interior, the nuclear periphery is widely regarded as transcriptionally silent. This is reflected by the preferential association of heterochromatin with the nuclear envelope (NE). However, some activated genes are recruited to the nuclear periphery through interactions with nuclear pore complexes (NPCs), and NPC components are capable of preventing the spread of silent chromatin into adjacent regions of active chromatin, leading to the speculation that NPCs may facilitate the transition of chromatin between transcriptional states. Thus, the NE might better be considered as a discontinuous platform that promotes both gene activation and repression. As such, it is perhaps not surprising that many disease states are frequently associated with alterations in the NE. Here, we review the effects of the NE and its constituents on chromatin organization and gene expression.
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13
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Wang Y, Xue Y, Chen S, Wu Y, Pan J, Zhang J, Shen J. A novel t(5;11)(q31;p15) involving the NUP98 gene on 11p15 is associated with a loss of the EGR1 gene on 5q31 in a patient with acute myeloid leukemia. ACTA ACUST UNITED AC 2010; 199:9-14. [PMID: 20417862 DOI: 10.1016/j.cancergencyto.2010.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2009] [Revised: 01/07/2010] [Accepted: 01/12/2010] [Indexed: 11/26/2022]
Abstract
To date, at least 25 translocations involving the NUP98 gene and different partner genes have been reported in the literature. Here, we describe a novel reciprocal t(5;11)(q31;p15) involving NUP98, as revealed by conventional karyotypic analysis using R-banding technique and fluorescence in situ hybridization (FISH) using a BAC RP11-120E20 probe and whole chromosome paint probes for chromosomes 5 and 11 in a 77-year-old woman who was diagnosed as having de novo acute myeloid leukemia. The patient received two courses of intensive combined chemotherapy but did not reach complete remission. She eventually died from the progressive disease, surviving for only 1 month after diagnosis. FISH analysis using WCP5 together with BAC RP11-878F9 or RP11-155N22 demonstrated that the breakpoint of chromosome 5 is located on 5q31. In addition, the EGR1 gene was unexpectedly found to be lost in the FISH study using EGR1 (red)/D5S23, D5S721 (green) dual-color probe. We supposed that the fusion gene created by t(5;11)(q31;p15) consisting of the NUP98 and its partner gene, as well as the loss of the EGR1 gene, may play a cooperative role in leukemogenesis. The partner gene of NUP98 in t(5;11)(q31;p15) is unclear at this time. Further molecular study is required to identify this partner gene in our patient.
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Affiliation(s)
- Yong Wang
- The First Affiliated Hospital of Soochow University, Jiangsu Institutes of Hematology, Suzhou, PR China
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14
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Xu S, Powers MA. Nuclear pore proteins and cancer. Semin Cell Dev Biol 2009; 20:620-30. [PMID: 19577736 DOI: 10.1016/j.semcdb.2009.03.003] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Revised: 03/05/2009] [Accepted: 03/09/2009] [Indexed: 12/28/2022]
Abstract
Nucleocytoplasmic trafficking of macromolecules, a highly specific and tightly regulated process, occurs exclusively through the nuclear pore complex. This immense structure is assembled from approximately 30 proteins, termed nucleoporins. Here we discuss the four nucleoporins that have been linked to cancers, either through elevated expression in tumors (Nup88) or through involvement in chromosomal translocations that encode chimeric fusion proteins (Tpr, Nup98, Nup214). In each case we consider the normal function of the nucleoporin and its translocation partners, as well as what is known about their mechanistic contributions to carcinogenesis, particularly in leukemias. Studies of nucleoporin-linked cancers have revealed novel mechanisms of oncogenesis and in the future, should continue to expand our understanding of cancer biology.
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Affiliation(s)
- Songli Xu
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA
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15
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A new fusion gene NUP98-IQCG identified in an acute T-lymphoid/myeloid leukemia with a t(3;11)(q29q13;p15)del(3)(q29) translocation. Oncogene 2007; 27:3414-23. [PMID: 18084320 DOI: 10.1038/sj.onc.1210999] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
NUP98 has been involved in multiple recurrent chromosome rearrangements in leukemia. We identified a novel fusion between NUP98 and IQ motif containing G (IQCG) gene from a de novo acute T-lymphoid/myeloid leukemia harboring t(3;11)(q29q13;p15)del(3)(q29). IQCG has two putative coiled-coil domains and one IQ domain. The FG repeat from NUP98 and the coiled-coil domain from IQCG were retained in the fusion protein. We demonstrated that NUP98-IQCG could form homodimer, heterodimerize with NUP98 or IQCG, bind co-activators and/or co-repressors, and show transcriptional activity in vitro. Expression of NUP98-IQCG inhibited 32Dcl3 cell apoptosis induced by Ara-C, and partially blocked granulocyte differentiation induced by G-CSF. Colony-forming assay and serial replating assays indicated that NUP98-IQCG was able to stimulate proliferation, partially block differentiation of hematopoietic stem/progenitor cells but was unable to confer transformation alone. Taken together, our data indicate that newly identified NUP98-IQCG fusion protein may play an essential role in leukemogenesis, but by itself may not be sufficient to induce leukemia.
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16
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Palmqvist L, Pineault N, Wasslavik C, Humphries RK. Candidate genes for expansion and transformation of hematopoietic stem cells by NUP98-HOX fusion genes. PLoS One 2007; 2:e768. [PMID: 17712416 PMCID: PMC1942085 DOI: 10.1371/journal.pone.0000768] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2007] [Accepted: 07/24/2007] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Hox genes are implicated in hematopoietic stem cell (HSC) regulation as well as in leukemia development through translocation with the nucleoporin gene NUP98. Interestingly, an engineered NUP98-HOXA10 (NA10) fusion can induce a several hundred-fold expansion of HSCs in vitro and NA10 and the AML-associated fusion gene NUP98-HOXD13 (ND13) have a virtually indistinguishable ability to transform myeloid progenitor cells in vitro and to induce leukemia in collaboration with MEIS1 in vivo. METHODOLOGY/PRINCIPAL FINDINGS These findings provided a potentially powerful approach to identify key pathways mediating Hox-induced expansion and transformation of HSCs by identifying gene expression changes commonly induced by ND13 and NA10 but not by a NUP98-Hox fusion with a non-DNA binding homedomain mutation (N51S). The gene expression repertoire of purified murine bone marrow Sca-1+Lin- cells transduced with retroviral vectors encoding for these genes was established using the Affymetrix GeneChip MOE430A. Approximately seventy genes were differentially expressed in ND13 and NA10 cells that were significantly changed by both compared to the ND13(N51S) mutant. Intriguingly, several of these potential Hox target genes have been implicated in HSC expansion and self-renewal, including the tyrosine kinase receptor Flt3, the prion protein, Prnp, hepatic leukemia factor, Hlf and Jagged-2, Jag2. Consistent with these results, FLT3, HLF and JAG2 expression correlated with HOX A cluster gene expression in human leukemia samples. CONCLUSIONS In conclusion this study has identified several novel Hox downstream target genes and provides important new leads to key regulators of the expansion and transformation of hematopoietic stem cells by Hox.
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Affiliation(s)
- Lars Palmqvist
- Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
- Institute of Biomedicine, Sahlgrenska University Hospital, Göteborg, Sweden
| | - Nicolas Pineault
- Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
| | - Carina Wasslavik
- Institute of Biomedicine, Sahlgrenska University Hospital, Göteborg, Sweden
| | - R. Keith Humphries
- Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
- Departments of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- * To whom correspondence should be addressed. E-mail:
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Yamamoto K, Yakushijin K, Kawamori Y, Minagawa K, Katayama Y, Matsui T. Translocation (7;9)(q22;q34) in therapy-related myelodysplastic syndrome after allogeneic bone marrow transplantation for acute myeloblastic leukemia. ACTA ACUST UNITED AC 2007; 176:61-6. [PMID: 17574966 DOI: 10.1016/j.cancergencyto.2007.02.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2007] [Revised: 02/07/2007] [Accepted: 02/09/2007] [Indexed: 11/26/2022]
Abstract
Reciprocal translocations involving the long arm of chromosome 7 are relatively rare cytogenetic aberrations in myelodysplastic syndrome (MDS) and acute myeloblastic leukemia (AML). A 44-year-old woman was initially given a diagnosis of de novo AML M6A with a normal karyotype. After achieving complete remission, she received allogeneic bone marrow transplantation from an unrelated male donor. Seven months later, pancytopenia appeared with 14.8% myeloblasts and dysplastic changes of neutrophils and megakaryocytes in the bone marrow. Chromosome analysis revealed complex karyotypes, with add(7)(q22) and add(9)(q34) detected in all abnormal metaphase spreads; spectral karyotyping revealed these chromosomal aberrations to be derived from a reciprocal translocation t(7;9)(q22;q34). Fluorescence in situ hybridization analyses showed that D7S486 at 7q31 was translocated to the der(9)t(7;9), and that the ABL gene at 9q34 remained on the der(9)t(7;9). Because the same translocation reappeared and sustained for more than 8 months after second stem cell transplantation, we revised the diagnosis as therapy-related MDS after allogeneic transplantation. The t(7;9)(q22;q34) was supposed to have a crucial role in the pathogenesis of MDS. Considering two other such reported cases of AML, the t(7;9)(q22;q34) may be a novel recurrent translocation in myeloid malignancies.
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Affiliation(s)
- Katsuya Yamamoto
- Hematology/Oncology, Department of Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
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18
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Romana SP, Radford-Weiss I, Ben Abdelali R, Schluth C, Petit A, Dastugue N, Talmant P, Bilhou-Nabera C, Mugneret F, Lafage-Pochitaloff M, Mozziconacci MJ, Andrieu J, Lai JL, Terre C, Rack K, Cornillet-Lefebvre P, Luquet I, Nadal N, Nguyen-Khac F, Perot C, Van den Akker J, Fert-Ferrer S, Cabrol C, Charrin C, Tigaud I, Poirel H, Vekemans M, Bernard OA, Berger R. NUP98 rearrangements in hematopoietic malignancies: a study of the Groupe Francophone de Cytogénétique Hématologique. Leukemia 2006; 20:696-706. [PMID: 16467868 DOI: 10.1038/sj.leu.2404130] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The NUP98 gene is fused with 19 different partner genes in various human hematopoietic malignancies. In order to gain additional clinico-hematological data and to identify new partners of NUP98, the Groupe Francophone de Cytogénétique Hématologique (GFCH) collected cases of hematological malignancies where a 11p15 rearrangement was detected. Fluorescence in situ hybridization (FISH) analysis showed that 35% of these patients (23/66) carried a rearrangement of the NUP98 locus. Genes of the HOXA cluster and the nuclear-receptor set domain (NSD) genes were frequently fused to NUP98, mainly in de novo myeloid malignancies whereas the DDX10 and TOP1 genes were equally rearranged in de novo and in therapy-related myeloid proliferations. Involvement of ADD3 and C6ORF80 genes were detected, respectively, in myeloid disorders and in T-cell acute lymphoblastic leukemia (T-ALL), whereas the RAP1GDS1 gene was fused to NUP98 in T-ALL. Three new chromosomal breakpoints: 3q22.1, 7p15 (in a localization distinct from the HOXA locus) and Xq28 were detected in rearrangements with the NUP98 gene locus. The present study as well as a review of the 73 cases previously reported in the literature allowed us to delineate some chromosomal, clinical and molecular features of patients carrying a NUP98 gene rearrangements.
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Affiliation(s)
- S P Romana
- Service de cytogénétique, Centre Hospitalier Universitaire (CHU) Necker-Enfants Malades, Paris, France.
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19
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Shali W, Hélias C, Fohrer C, Struski S, Gervais C, Falkenrodt A, Leymarie V, Lioure B, Raby P, Herbrecht R, Lessard M. Cytogenetic studies of a series of 43 consecutive secondary myelodysplastic syndromes/acute myeloid leukemias: conventional cytogenetics, FISH, and multiplex FISH. ACTA ACUST UNITED AC 2006; 168:133-45. [PMID: 16843103 DOI: 10.1016/j.cancergencyto.2006.02.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2005] [Revised: 01/31/2006] [Accepted: 02/07/2006] [Indexed: 12/01/2022]
Abstract
We report a series of 43 consecutive therapy-related myelodysplastic syndromes (t-MDS) or acute myeloid leukemias (t-AML) observed for 6 years. This series consisted of 26 women and 17 men, ages ranging from 9 to 85 years. These cases were classified into three groups according to the primary diagnosis. Conventional cytogenetic and fluorescent in situ hybridization (FISH)/ multiplex FISH (M-FISH) methods were used to analyze cytogenetic characteristics of secondary MDS/AML. The features of chromosomal abnormalities were linked to the nature of the therapy and protocols used. A considerable proportion of recurrent balanced translocations characterized t-AML secondary to therapy. FISH techniques showed that conventional cytogenetics often underestimated associated translocations; some deletions were in fact derivative chromosomes associated with deletions. After treatment for lymphomas and chronic myeloproliferative diseases, there were more complex unbalanced abnormalities than the control group. Compared to other series, recurrent translocations appeared to be more numerous (25%), probably reflecting an evolution of therapeutic modalities.
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Affiliation(s)
- Wei Shali
- Laboratoire d'Hématologie, Hôpitaux Universitaires de Strasbourg, Avenue Moliére, 67098 Strasbourg, France
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20
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Abstract
PURPOSE OF REVIEW Recurring chromosomal abnormalities are considered the primary genetic change in oncogenesis as well as an important indicator for tumor phenotype and clinical outcome. This review highlights recent findings regarding the genes associated with chromosomal translocations. RECENT FINDINGS A great number of novel fusion genes associated with chromosomal translocations have been cloned. These novel fusion genes are found in the smaller part of various malignancies, and it can be expected that the significance of novel fusion gene occurrence for oncogenesis will be clarified in the not too distant future. Observation of high frequencies of mutations in NOTCH1, NPM and JAK2 in T-cell acute lymphoblastic leukemia, acute myeloid leukemia with normal karyotype and myeloproliferative disorders (polycythemia vera, essential thrombocythemia and idiopathic myelofibrosis) have provided important suggestions for a better understanding of chromosomal translocations. This is because all these genes had already been identified as genes associated with chromosomal translocations in a small subset of specific phenotypes of hematologic malignancies. SUMMARY This review summarizes recent findings associated with chromosomal translocations including newly identified fusion genes, a novel mechanism of fusion gene formation and their relevance for novel targeted therapies. Continuing attempts to identify genes associated with chromosomal translocations can be expected to provide further insights into the significance of various gene alterations in cancer and the development of novel targeted therapies.
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Affiliation(s)
- Tomohiko Taki
- Department of Molecular Laboratory Medicine, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Kyoto, Japan
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21
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Nebral K, Schmidt HH, Haas OA, Strehl S. NUP98 Is Fused to Topoisomerase (DNA) IIβ 180 kDa (TOP2B) in a Patient with Acute Myeloid Leukemia with a New t(3;11)(p24;p15). Clin Cancer Res 2005; 11:6489-94. [PMID: 16166424 DOI: 10.1158/1078-0432.ccr-05-0150] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE The nucleoporin 98 kDa (NUP98) gene has been reported to be fused to 17 different partner genes in various hematologic malignancies with 11p15 aberrations. Cytogenetic analysis of an adult de novo acute myelogenous leukemia (M5a) revealed a t(3;11)(p24;p15), suggesting rearrangement of NUP98 with a novel partner gene. EXPERIMENTAL DESIGN Fluorescence in situ hybridization (FISH) was used to confirm the involvement of NUP98 in the t(3;11)(p24;p15). Selection of possible NUP98 partner genes was done by computer-aided analysis of the 3p24 region using the University of California Santa Cruz genome browser. Fusion gene-specific FISH and reverse transcription-PCR analyses were done to verify the presence of the new NUP98 fusion. RESULTS FISH analysis using a NUP98-specific clone showed a split signal, indicating that the NUP98 gene was affected by the translocation. Of the genes localized at 3p24, TOP2B was selected as a possible fusion partner candidate gene. Dual-color fusion gene-specific FISH and reverse transcription-PCR analysis verified that NUP98 was indeed fused to TOP2B. In addition to reciprocal NUP98-TOP2B and TOP2B-NUP98 in-frame fusion transcripts, an alternatively spliced out-of-frame TOP2B-NUP98 transcript that resulted in a premature stop codon was detected. Analysis of the genomic breakpoints revealed typical signs of nonhomologous end joining resulting from error-prone DNA repair. CONCLUSIONS TOP2B encodes a type II topoisomerase, which is involved in DNA transcription, replication, recombination, and mitosis, and besides TOP1, represents the second NUP98 fusion partner gene that belongs to the topoisomerase gene family. This finding emphasizes the important role of topoisomerases in malignant transformation processes.
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MESH Headings
- Acute Disease
- Amino Acid Sequence
- Base Sequence
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 3/genetics
- DNA Topoisomerases, Type II/genetics
- DNA-Binding Proteins/genetics
- Humans
- In Situ Hybridization, Fluorescence
- Leukemia, Myeloid/genetics
- Male
- Middle Aged
- Molecular Sequence Data
- Nuclear Pore Complex Proteins/genetics
- Oncogene Proteins, Fusion/genetics
- Poly-ADP-Ribose Binding Proteins
- RNA, Neoplasm/genetics
- RNA, Neoplasm/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Sequence Homology, Nucleic Acid
- Translocation, Genetic
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Affiliation(s)
- Karin Nebral
- Children's Cancer Research Institute, Vienna, Austria
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22
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Moore MAS. Converging pathways in leukemogenesis and stem cell self-renewal. Exp Hematol 2005; 33:719-37. [PMID: 15963848 DOI: 10.1016/j.exphem.2005.04.011] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2005] [Accepted: 04/29/2005] [Indexed: 12/11/2022]
Abstract
Studies over the last 40 years have led to an understanding of the hierarchical organization of the hematopoietic system and the role of the pluripotential hematopoietic stem cell. Earlier recognition of the importance of bone marrow hematopoietic microenvironments has evolved into the recognition of specific niches that regulate stem cell pool size, proliferative status, mobilization, and differentiation. The discovery of the role of multiple hematopoietic growth factors and their receptors in the orchestration of stem cell self-renewal and differentiation has been followed by recognition of the importance of the Notch and Wnt pathways. The homeobox family of transcription factors serve as master regulators of development and are increasingly found to be critical regulators of hematopoiesis. In parallel with this understanding of normal hematopoiesis has come a recognition that stem cell dysregulation at various levels is involved in leukemogenesis. Furthermore, the progression from chronic leukemia or myelodysplasia to acute leukemia involves accumulation of at least two mutational events that lead to enhancement of stem cell proliferation, or acquisition of stem cell behavior by a progenitor cell, coupled with maturation inhibition. Translocations resulting in development of oncogenic fusion genes are found in AML and the transforming potential of two of these, AML1-ETO and NUP98-HOXA9, will be discussed. Secondary, constitutively activating mutations of the Flt3 and c-kit receptors and of K- and N-ras are found with high frequency in AML, and the transforming potential of mutated FLT3 and the role of STAT5A activation in human stem cell transformation will be reviewed.
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Affiliation(s)
- Malcolm A S Moore
- James Ewing Laboratory of Developmental Hematopoiesis, Cell Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY, USA.
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