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Barreyro L, Sampson AM, Hueneman K, Choi K, Christie S, Ramesh V, Wyder M, Wang D, Pujato M, Greis KD, Huang G, Starczynowski DT. Dysregulated innate immune signaling cooperates with RUNX1 mutations to transform an MDS-like disease to AML. iScience 2024; 27:109809. [PMID: 38784013 PMCID: PMC11112336 DOI: 10.1016/j.isci.2024.109809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/07/2024] [Accepted: 04/22/2024] [Indexed: 05/25/2024] Open
Abstract
Dysregulated innate immune signaling is linked to preleukemic conditions and myeloid malignancies. However, it is unknown whether sustained innate immune signaling contributes to malignant transformation. Here we show that cell-intrinsic innate immune signaling driven by miR-146a deletion (miR-146aKO), a commonly deleted gene in myelodysplastic syndromes (MDS) and acute myeloid leukemia (AML), cooperates with mutant RUNX1 (RUNX1mut) to initially induce marrow failure and features of MDS. However, miR-146aKO hematopoietic stem and/or progenitor cells (HSPCs) expressing RUNX1mut eventually progress to a fatal AML. miR-146aKO HSPCs exhaust during serial transplantation, while expression of RUNX1mut restored their hematopoietic cell function. Thus, HSPCs exhibiting dysregulated innate immune signaling require a second hit to develop AML. Inhibiting the dysregulated innate immune pathways with a TRAF6-UBE2N inhibitor suppressed leukemic miR-146aKO/RUNX1mut HSPCs, highlighting the necessity of TRAF6-dependent cell-intrinsic innate immune signaling in initiating and maintaining AML. These findings underscore the critical role of dysregulated cell-intrinsic innate immune signaling in driving preleukemic cells toward AML progression.
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Affiliation(s)
- Laura Barreyro
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital, Cincinnati, OH, USA
| | - Avery M. Sampson
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital, Cincinnati, OH, USA
| | - Kathleen Hueneman
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital, Cincinnati, OH, USA
| | - Kwangmin Choi
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital, Cincinnati, OH, USA
| | - Susanne Christie
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital, Cincinnati, OH, USA
| | - Vighnesh Ramesh
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital, Cincinnati, OH, USA
| | - Michael Wyder
- Department of Cancer Biology, University of Cincinnati, Cincinnati, OH, USA
| | - Dehua Wang
- Department of Pathology & Laboratory Medicine, University of Cincinnati, Cincinnati, OH, USA
- Department of Pathology, Cincinnati Children’s Hospital, Cincinnati, OH, USA
| | - Mario Pujato
- Life Sciences Computational Services, LLC, Huntingdon Valley, PA, USA
| | - Kenneth D. Greis
- Department of Cancer Biology, University of Cincinnati, Cincinnati, OH, USA
| | - Gang Huang
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital, Cincinnati, OH, USA
- Department of Cell Systems & Anatomy, UT Health San Antonio, San Antonio, TX, USA
- Department of Pathology & Laboratory Medicine, UT Health San Antonio, San Antonio, TX, USA
| | - Daniel T. Starczynowski
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children’s Hospital, Cincinnati, OH, USA
- Department of Cancer Biology, University of Cincinnati, Cincinnati, OH, USA
- University of Cincinnati Cancer Center, Cincinnati, OH, USA
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2
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Georgi JA, Stasik S, Eckardt JN, Zukunft S, Hartwig M, Röllig C, Middeke JM, Oelschlägel U, Krug U, Sauer T, Scholl S, Hochhaus A, Brümmendorf TH, Naumann R, Steffen B, Einsele H, Schaich M, Burchert A, Neubauer A, Schäfer-Eckart K, Schliemann C, Krause SW, Hänel M, Noppeney R, Kaiser U, Baldus CD, Kaufmann M, Müller-Tidow C, Platzbecker U, Berdel WE, Serve H, Ehninger G, Bornhäuser M, Schetelig J, Kroschinsky F, Thiede C. UBTF tandem duplications are rare but recurrent alterations in adult AML and associated with younger age, myelodysplasia, and inferior outcome. Blood Cancer J 2023; 13:88. [PMID: 37236968 DOI: 10.1038/s41408-023-00858-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/03/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
Tandem-duplication mutations of the UBTF gene (UBTF-TDs) coding for the upstream binding transcription factor have recently been described in pediatric patients with acute myeloid leukemia (AML) and were found to be associated with particular genetics (trisomy 8 (+8), FLT3-internal tandem duplications (FLT3-ITD), WT1-mutations) and inferior outcome. Due to limited knowledge on UBTF-TDs in adult AML, we screened 4247 newly diagnosed adult AML and higher-risk myelodysplastic syndrome (MDS) patients using high-resolution fragment analysis. UBTF-TDs were overall rare (n = 52/4247; 1.2%), but significantly enriched in younger patients (median age 41 years) and associated with MDS-related morphology as well as significantly lower hemoglobin and platelet levels. Patients with UBTF-TDs had significantly higher rates of +8 (34% vs. 9%), WT1 (52% vs. 7%) and FLT3-ITD (50% vs. 20.8%) co-mutations, whereas UBTF-TDs were mutually exclusive with several class-defining lesions such as mutant NPM1, in-frame CEBPAbZIP mutations as well as t(8;21). Based on the high-variant allele frequency found and the fact that all relapsed patients analyzed (n = 5) retained the UBTF-TD mutation, UBTF-TDs represent early clonal events and are stable over the disease course. In univariate analysis, UBTF-TDs did not represent a significant factor for overall or relapse-free survival in the entire cohort. However, in patients under 50 years of age, who represent the majority of UBTF-mutant patients, UBTF-TDs were an independent prognostic factor for inferior event-free (EFS), relapse-free (RFS) and overall survival (OS), which was confirmed by multivariable analyses including established risk factors such as age and ELN2022 genetic risk groups (EFS [HR: 2.20; 95% CI 1.52-3.17, p < 0.001], RFS [HR: 1.59; 95% CI 1.02-2.46, p = 0.039] and OS [HR: 1.64; 95% CI 1.08-2.49, p = 0.020]). In summary, UBTF-TDs appear to represent a novel class-defining lesion not only in pediatric AML but also younger adults and are associated with myelodysplasia and inferior outcome in these patients.
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Affiliation(s)
- Julia-Annabell Georgi
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
| | - Sebastian Stasik
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
| | - Jan-Niklas Eckardt
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
| | - Sven Zukunft
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
| | - Marita Hartwig
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
| | - Christoph Röllig
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
| | - Jan Moritz Middeke
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
| | - Uta Oelschlägel
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
| | - Utz Krug
- Medizinische Klinik 3, Klinikum Leverkusen, Leverkusen, Germany
| | - Tim Sauer
- Universität Heidelberg, Medizinische Klinik und Poliklinik, Abteilung Innere Medizin V, Heidelberg, Germany
| | - Sebastian Scholl
- Klinik für Innere Medizin II, Universitätsklinikum Jena, Jena, Germany
| | - Andreas Hochhaus
- Klinik für Innere Medizin II, Universitätsklinikum Jena, Jena, Germany
| | | | - Ralph Naumann
- Medizinische Klinik III, St. Marien-Krankenhaus Siegen, Siegen, Germany
| | - Björn Steffen
- Medizinische Klinik 2, Hämatologie/Onkologie, Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany
| | - Hermann Einsele
- Medizinische Klinik und Poliklinik II, Universitätsklinikum Würzburg, Würzburg, Germany
| | - Markus Schaich
- Klinik für Hämatologie, Onkologie und Palliativmedizin, Rems-Murr-Klinikum Winnenden, Winnenden, Germany
| | - Andreas Burchert
- Klinik für Innere Medizin, Schwerpunkt Hämatologie, Onkologie und Immunologie, Philipps Universität Marburg, Marburg, Germany
| | - Andreas Neubauer
- Klinik für Innere Medizin, Schwerpunkt Hämatologie, Onkologie und Immunologie, Philipps Universität Marburg, Marburg, Germany
| | - Kerstin Schäfer-Eckart
- Klinikum Nürnberg, Paracelsus Medizinische Privatuniversität, Medizinische Klinik 5, Nürnberg, Germany
| | | | - Stefan W Krause
- Medizinische Klinik 5, Universitätsklinikum Erlangen, Erlangen, Germany
| | - Mathias Hänel
- Klinik für Innere Medizin III, Klinikum Chemnitz, Chemnitz, Germany
| | - Richard Noppeney
- Klinik für Hämatologie, Universitätsklinikum Essen, Essen, Germany
| | - Ulrich Kaiser
- Medizinische Klinik II, St. Bernward Krankenhaus, Hildesheim, Germany
| | - Claudia D Baldus
- Klinik für Innere Medizin II, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Martin Kaufmann
- Abteilung für Hämatologie, Onkologie und Palliativmedizin, Robert-Bosch-Krankenhaus, Stuttgart, Germany
| | - Carsten Müller-Tidow
- Universität Heidelberg, Medizinische Klinik und Poliklinik, Abteilung Innere Medizin V, Heidelberg, Germany
| | - Uwe Platzbecker
- Klinik und Poliklinik für Hämatologie, Zelltherapie und Hämostaseologie, Universitätsklinikum Leipzig, Leipzig, Germany
| | - Wolfgang E Berdel
- Medizinische Klinik A, Universitätsklinikum Münster, Münster, Germany
| | - Hubert Serve
- Medizinische Klinik 2, Hämatologie/Onkologie, Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany
| | | | - Martin Bornhäuser
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
- National Center for Tumor Diseases NCT, Dresden, Germany
| | - Johannes Schetelig
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
- DKMS Clinical Trials Unit, Dresden, Germany
| | - Frank Kroschinsky
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany
| | - Christian Thiede
- Medizinische Klinik und Poliklinik 1, Universitätsklinikum Carl Gustav Carus, Dresden, Germany.
- AgenDix GmbH, Dresden, Germany.
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Cao Z, Shu Y, Wang J, Wang C, Feng T, Yang L, Shao J, Zou L. Super enhancers: Pathogenic roles and potential therapeutic targets for acute myeloid leukemia (AML). Genes Dis 2022; 9:1466-1477. [PMID: 36157504 PMCID: PMC9485276 DOI: 10.1016/j.gendis.2022.01.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 01/06/2022] [Accepted: 01/13/2022] [Indexed: 11/04/2022] Open
Abstract
Acute myeloid leukemia (AML) is a malignant hematological tumor with disordered oncogenes/tumor suppressor genes and limited treatments. The potent anti-cancer effects of bromodomain and extra-terminal domain (BET) inhibitors, targeting the key component of super enhancers, in early clinical trials on AML patients, implies the critical role of super enhancers in AML. Here, we review the concept and characteristic of super enhancer, and then summarize the current researches about super enhancers in AML pathogenesis, diagnosis and classification, followed by illustrate the potential super enhancer-related targets and drugs, and propose the future directions of super enhancers in AML. This information provides integrated insight into the roles of super enhancers in this disease.
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Affiliation(s)
- Ziyang Cao
- Clinical Research Unit, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, PR China
- Institute of Pediatric Infection, Immunity, Critical Care Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200062, PR China
| | - Yi Shu
- Center for Clinical Molecular Laboratory Medicine of Children's Hospital of Chongqing Medical University, Chongqing 400014, PR China
| | - Jinxia Wang
- Clinical Research Unit, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, PR China
- Institute of Pediatric Infection, Immunity, Critical Care Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200062, PR China
| | - Chunxia Wang
- Clinical Research Unit, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, PR China
- Institute of Pediatric Infection, Immunity, Critical Care Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200062, PR China
| | - Tienan Feng
- Clinical Research Unit, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, PR China
- Clinical Research Institute, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, PR China
| | - Li Yang
- Department of Hematology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China
| | - Jingbo Shao
- Department of Hematology/Oncology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, PR China
| | - Lin Zou
- Clinical Research Unit, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, PR China
- Institute of Pediatric Infection, Immunity, Critical Care Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200062, PR China
- Center for Clinical Molecular Laboratory Medicine of Children's Hospital of Chongqing Medical University, Chongqing 400014, PR China
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4
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El-Meligui YM, Hassan NM, Kassem AB, Gouda NA, Mohanad M, Hamouda MA, Salahuddin A. Impact of HOXB4 and PRDM16 Gene Expressions on Prognosis and Treatment Response in Acute Myeloid Leukemia Patients. Pharmgenomics Pers Med 2022; 15:663-674. [PMID: 35782688 PMCID: PMC9241994 DOI: 10.2147/pgpm.s368640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/14/2022] [Indexed: 12/08/2022] Open
Abstract
Introduction Acute myeloid leukemia (AML) is the most common type of leukemia among adults and is characterized by various genetic abnormalities. HOXB4 and PRDM16 are promising markers of AML. Our objective is to assess the potential roles of HOXB4 and PRDM16 as prognostic and predictive markers in newly diagnosed AML patients and determine the correlation between their expressions and other prognostic markers as FLT3-ITD, NPM1 exon 12 mutations, response to treatment, and patient’s survival. Methods This study included 83 de novo AML adult patients. All patients were subjected to clinical, morphological, cytochemical, and molecular analysis to detect HOXB4 and PRDM16 gene expressions and FLT3-ITD, NPM1 exon 12 mutations. Results The results showed that a low expression of HOXB4 was found in 31.3% of AML patients, whereas a high expression of PRDM16 was evident in 33.8% of AML patients. FLT3-ITD mutations were detected in 6 patients (7.2%), while NPM1 exon 12 mutations were detected in 7 patients (19.4%) out of 36 patients with intermediate genetic risk. Out of the 50 patients who achieved complete remission (CR), relapse occurred in 16% of the cases. Low expression of HOXB4 and high expression of PRDM16 were associated with CR of 32% and 28%, respectively, and a short overall survival (OS) and disease-free survival (DFS). Conclusion Further larger study should be conducted to verify that high PRDM16 and low HOXB4 gene expressions could be used as a poor prognostic predictor for AML. The correlation between PRDM16 and HOXB4 gene expressions and FLT3-ITD and NPM1 exon 12 mutations might have a role on CR, relapse, OS, and, however, this should be clarified in analysis with a larger number of samples.
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Affiliation(s)
- Yomna M El-Meligui
- Clinical Pathology Department, National Cancer Institute, Cairo University, Cairo, Egypt
| | - Naglaa M Hassan
- Clinical Pathology Department, National Cancer Institute, Cairo University, Cairo, Egypt
| | - Amira B Kassem
- Clinical Pharmacy and Pharmacy Practice Department, Faculty of Pharmacy, Damanhour University, Damanhour, Egypt
- Correspondence: Amira B Kassem, Email
| | - Nora A Gouda
- Cancer Epidemiology and Biostatistics Department, National Cancer Institute, Cairo University, Cairo, Egypt
| | - Marwa Mohanad
- Biochemistry Department, College of Pharmaceutical Sciences and Drug Manufacturing, Misr University for Science and Technology, Giza, Egypt
| | - Manal A Hamouda
- Clinical Pharmacy Department, Faculty of Pharmacy, Menoufia University, Shibin El Kom, Egypt
| | - Ahmad Salahuddin
- Biochemistry Department, Faculty of Pharmacy, Damanhour University, Damanhour, Egypt
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Jiang N, Yang M, Han Y, Zhao H, Sun L. PRDM16 Regulating Adipocyte Transformation and Thermogenesis: A Promising Therapeutic Target for Obesity and Diabetes. Front Pharmacol 2022; 13:870250. [PMID: 35462933 PMCID: PMC9024053 DOI: 10.3389/fphar.2022.870250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 03/11/2022] [Indexed: 11/13/2022] Open
Abstract
Given that obesity and diabetes have been major public health concerns and that disease morbidities have been rising continuously, effective treatment for these diseases is urgently needed. Because adipose tissue metabolism is involved in the progression of obesity and diabetes, it might be efficient to target adipocyte metabolic pathways. Positive regulatory domain zinc finger region protein 16 (PRDM16), a transcription factor that is highly expressed in adipocytes, plays a key role in adipose tissue metabolism, such as the browning and thermogenesis of adipocytes, the beigeing of adipocytes, the adipogenic differentiation of myoblasts, and the conversion of visceral adipocytes to subcutaneous adipocytes. Furthermore, clinical and basic studies have shown that the expression of PRDM16 is associated with obesity and diabetes and that PRDM16 signaling participates in the treatment of the two diseases. For example, metformin promotes thermogenesis and alleviates obesity by activating the AMPK/αKG/PRDM16 signaling pathway; rosiglitazone alleviates obesity under the synergistic effect of PRDM16; resveratrol plays an antiobesity role by inducing the expression of PRDM16; liraglupeptide improves insulin resistance by inducing the expression of PRDM16; and mulberry leaves play an anti-inflammatory and antidiabetes role by activating the expression of brown fat cell marker genes (including PRDM16). In this review, we summarize the evidence of PRDM16 involvement in the progression of obesity and diabetes and that PRDM16 may be a promising therapy for obesity and diabetes.
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Mayer IM, Hoelbl-Kovacic A, Sexl V, Doma E. Isolation, Maintenance and Expansion of Adult Hematopoietic Stem/Progenitor Cells and Leukemic Stem Cells. Cancers (Basel) 2022; 14:cancers14071723. [PMID: 35406494 PMCID: PMC8996967 DOI: 10.3390/cancers14071723] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/23/2022] [Accepted: 03/25/2022] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Transplantation of adult hematopoietic stem cells is an important therapeutic tool to help patients suffering from diverse hematological disorders. All types of blood cells can develop from a single hematopoietic stem cell underlining their enormous potential. Intense efforts are ongoing to generate “engraftable” human hematopoietic stem cells to treat hematopoietic diseases and to understand the molecular machinery driving them. Leukemic stem cells represent a low frequency subpopulation of leukemia cells that possess stem cell properties. They can instigate, maintain, and serially propagate leukemia in vivo, while they retain the capacity to differentiate into committed progenitors. Leukemic stem cells are unaffected by many therapeutic strategies and represent the major cause of relapse. We here describe all methods to maintain and expand murine and human hematopoietic cells in culture and describe their specific advantages. These methods are also employed to understand the biology of leukemic stem cells and to identify novel therapeutic strategies. Abstract Hematopoietic stem cells (HSCs) are rare, self-renewing cells that perch on top of the hematopoietic tree. The HSCs ensure the constant supply of mature blood cells in a tightly regulated process producing peripheral blood cells. Intense efforts are ongoing to optimize HSC engraftment as therapeutic strategy to treat patients suffering from hematopoietic diseases. Preclinical research paves the way by developing methods to maintain, manipulate and expand HSCs ex vivo to understand their regulation and molecular make-up. The generation of a sufficient number of transplantable HSCs is the Holy Grail for clinical therapy. Leukemia stem cells (LSCs) are characterized by their acquired stem cell characteristics and are responsible for disease initiation, progression, and relapse. We summarize efforts, that have been undertaken to increase the number of long-term (LT)-HSCs and to prevent differentiation towards committed progenitors in ex vivo culture. We provide an overview and compare methods currently available to isolate, maintain and enrich HSC subsets, progenitors and LSCs and discuss their individual advantages and drawbacks.
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An oncogenic enhancer encodes selective selenium dependency in AML. Cell Stem Cell 2022; 29:386-399.e7. [PMID: 35108519 PMCID: PMC8903199 DOI: 10.1016/j.stem.2022.01.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 11/29/2021] [Accepted: 01/04/2022] [Indexed: 12/13/2022]
Abstract
Deregulation of transcription is a hallmark of acute myeloid leukemia (AML) that drives oncogenic expression programs and presents opportunities for therapeutic targeting. By integrating comprehensive pan-cancer enhancer landscapes with genetic dependency mapping, we find that AML-enriched enhancers encode for more selective tumor dependencies. We hypothesized that this approach could identify actionable dependencies downstream of oncogenic driver events and discovered a MYB-regulated AML-enriched enhancer regulating SEPHS2, a key component of the selenoprotein production pathway. Using a combination of patient samples and mouse models, we show that this enhancer upregulates SEPHS2, promoting selenoprotein production and antioxidant function required for AML survival. SEPHS2 and other selenoprotein pathway genes are required for AML growth in vitro. SEPHS2 knockout and selenium dietary restriction significantly delay leukemogenesis in vivo with little effect on normal hematopoiesis. These data validate the utility of enhancer mapping in target identification and suggest that selenoprotein production is an actionable target in AML.
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Genome-wide DNA Methylation Analysis in Pediatric Acute Myeloid Leukemia. Blood Adv 2022; 6:3207-3219. [PMID: 35008106 PMCID: PMC9198913 DOI: 10.1182/bloodadvances.2021005381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 12/20/2021] [Indexed: 12/03/2022] Open
Abstract
FLT3-ITD and high PRDM16 expression induced methylation changes at STAT5 and AP-1 binding sites in pediatric AML. Hypomethylated regions in PRDM16-highly expressed AMLs were correlated with enhanced chromatin accessibilities at multiple genomic regions.
We investigated genome-wide DNA methylation patterns in 64 pediatric patients with acute myeloid leukemia (AML). Based on unsupervised clustering with the 567 most variably methylated cytosine guanine dinucleotide (CpG) sites, patients were categorized into 4 clusters associated with genetic alterations. Clusters 1 and 3 were characterized by the presence of known favorable prognostic factors, such as RUNX1-RUNX1T1 fusion and KMT2A rearrangement with low MECOM expression, and biallelic CEBPA mutations (all 8 patients), respectively. Clusters 2 and 4 comprised patients exhibiting molecular features associated with adverse outcomes, namely internal tandem duplication of FLT3 (FLT3-ITD), partial tandem duplication of KMT2A, and high PRDM16 expression. Depending on the methylation values of the 1243 CpG sites that were significantly different between FLT3-ITD+ and FLT3-ITD− AML, patients were categorized into 3 clusters: A, B, and C. The STAT5-binding motif was most frequently found close to the 1243 CpG sites. All 8 patients with FLT3-ITD in cluster A harbored high PRDM16 expression and experienced adverse events, whereas only 1 of 7 patients with FLT3-ITD in the other clusters experienced adverse events. PRDM16 expression levels were also related to DNA methylation patterns, which were drastically changed at the cutoff value of PRDM16/ABL1 = 0.10. The assay for transposase-accessible chromatin sequencing of AMLs supported enhanced chromatin accessibility around genomic regions, such as HOXB cluster genes, SCHIP1, and PRDM16, which were associated with DNA methylation changes in AMLs with FLT3-ITD and high PRDM16 expression. Our results suggest that DNA methylation levels at specific CpG sites are useful to support genetic alterations and gene expression patterns of patients with pediatric AML.
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Kanagal-Shamanna R, Montalban-Bravo G, Sasaki K, Darbaniyan F, Jabbour E, Bueso-Ramos C, Wei Y, Chien K, Kadia T, Ravandi F, Borthakur G, Soltysiak KA, Routbort M, Patel K, Pierce S, Medeiros LJ, Kantarjian HM, Garcia-Manero G. Only SF3B1 mutation involving K700E independently predicts overall survival in myelodysplastic syndromes. Cancer 2021; 127:3552-3565. [PMID: 34161603 PMCID: PMC10015977 DOI: 10.1002/cncr.33745] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 04/14/2021] [Accepted: 05/11/2021] [Indexed: 11/08/2022]
Abstract
BACKGROUND SF3B1 mutations (SF3B1mut ) in myelodysplastic syndromes (MDS) frequently involve codon K700E and have a favorable prognosis. The prognostic effect of non-K700E SF3B1mut is uncertain. METHODS The authors analyzed the clinicopathological features and outcomes of a single-institution series of 94 treatment-naive SF3B1mut MDS patients (18%) and 415 treatment-naive SF3B1wt MDS patients and explored the differences between K700E and non-K700E SF3B1mut MDS. RESULTS Fifty-five patients (59%) carried K700E. Recurrent non-K700E mutations (39 [41%]) included R625, H662, and K666. Compared with SF3B1mut K700E patients, non-K700E patients had a lower median absolute neutrophil count (1.8 vs 2.4; P = .005) and were frequently "high" according to the Revised International Prognostic Scoring System (19% vs 4%; P = .031). Non-K700E MDS was associated frequently with RUNX1 (26% vs 7%; P = .012) and exclusively with BCOR, IDH2, and SRSF2 mutations. A splicing analysis showed the differential distribution of alternatively spliced events and gene expression profiles between K700 and non-K700E MDS patients. The majority (at least 80%) of SF3B1mut K700E, SF3B1mut non-K700E, and SF3B1wt patients were treated with hypomethylating agents. Over a median follow-up of 16 months, SF3B1mut had superior overall survival (OS) in comparison with SF3B1wt in all MDS patients (not reached vs 25.2 months; P = .0003), in patients with low-grade MDS, and in patients with myelodysplastic syndromes with ring sideroblasts (MDS-RS). Compared with SF3B1wt , SF3B1mut K700E had superior outcomes in all MDS (median OS, 25 months vs not reached; P = .0001), in low-grade MDS (median OS, 41.3 months vs not reached; P = .0015), and in MDS-RS (median OS, 22.3 months vs not reached; P = .0001), but no significant difference was seen between non-K700E and SF3B1wt MDS. By multivariable analysis, the absence of SF3B1mut K700E mutations was independently associated with the prognosis. CONCLUSIONS This study highlights the importance of the SF3B1 mutation subtype in MDS risk assessment. LAY SUMMARY Myelodysplastic syndromes (MDS) with SF3B1 mutations are regarded as having a favorable prognosis by both the World Health Organization and the International Working Group for the Prognosis of Myelodysplastic Syndromes. However, this article shows that only MDS patients with SF3B1 K700E mutations have a favorable prognosis (and not MDS patients with SF3B1 mutations involving other codons). This has important implications for refining future MDS subclassification and risk assessment criteria.
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Affiliation(s)
- Rashmi Kanagal-Shamanna
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | | | - Koji Sasaki
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Faezeh Darbaniyan
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Elias Jabbour
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Carlos Bueso-Ramos
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Yue Wei
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Kelly Chien
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Tapan Kadia
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Farhad Ravandi
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Gautam Borthakur
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Kelly A Soltysiak
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mark Routbort
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Keyur Patel
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Sherry Pierce
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - L Jeffrey Medeiros
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Hagop M Kantarjian
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, Texas
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10
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Murdaugh RL, Hoegenauer KA, Kitano A, Holt MV, Hill MC, Shi X, Tiessen JF, Chapple R, Hu T, Tseng YJ, Lin A, Martin JF, Young NL, Nakada D. The histone H3.3 chaperone HIRA restrains erythroid-biased differentiation of adult hematopoietic stem cells. Stem Cell Reports 2021; 16:2014-2028. [PMID: 34242617 PMCID: PMC8365107 DOI: 10.1016/j.stemcr.2021.06.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 06/11/2021] [Accepted: 06/11/2021] [Indexed: 11/15/2022] Open
Abstract
Histone variants contribute to the complexity of the chromatin landscape and play an integral role in defining DNA domains and regulating gene expression. The histone H3 variant H3.3 is incorporated into genic elements independent of DNA replication by its chaperone HIRA. Here we demonstrate that Hira is required for the self-renewal of adult hematopoietic stem cells (HSCs) and to restrain erythroid differentiation. Deletion of Hira led to rapid depletion of HSCs while differentiated hematopoietic cells remained largely unaffected. Depletion of HSCs after Hira deletion was accompanied by increased expression of bivalent and erythroid genes, which was exacerbated upon cell division and paralleled increased erythroid differentiation. Assessing H3.3 occupancy identified a subset of polycomb-repressed chromatin in HSCs that depends on HIRA to maintain the inaccessible, H3.3-occupied state for gene repression. HIRA-dependent H3.3 incorporation thus defines distinct repressive chromatin that represses erythroid differentiation of HSCs.
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Affiliation(s)
- Rebecca L Murdaugh
- Graduate Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Kevin A Hoegenauer
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ayumi Kitano
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Matthew V Holt
- Graduate Program in Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Verna & Marrs McLean Department of Biochemistry & Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Matthew C Hill
- Graduate Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Xiangguo Shi
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jonathan F Tiessen
- Graduate Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Richard Chapple
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Tianyuan Hu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yu-Jung Tseng
- Graduate Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - Angelique Lin
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - James F Martin
- Graduate Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77030, USA; Texas Heart Institute, Houston, TX 77030, USA
| | - Nicolas L Young
- Graduate Program in Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Verna & Marrs McLean Department of Biochemistry & Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Daisuke Nakada
- Graduate Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Graduate Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX 77030, USA.
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11
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Shi X, Jiang Y, Kitano A, Hu T, Murdaugh RL, Li Y, Hoegenauer KA, Chen R, Takahashi K, Nakada D. Nuclear NAD + homeostasis governed by NMNAT1 prevents apoptosis of acute myeloid leukemia stem cells. SCIENCE ADVANCES 2021; 7:7/30/eabf3895. [PMID: 34290089 PMCID: PMC8294764 DOI: 10.1126/sciadv.abf3895] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 06/03/2021] [Indexed: 05/13/2023]
Abstract
Metabolic dysregulation underlies malignant phenotypes attributed to cancer stem cells, such as unlimited proliferation and differentiation blockade. Here, we demonstrate that NAD+ metabolism enables acute myeloid leukemia (AML) to evade apoptosis, another hallmark of cancer stem cells. We integrated whole-genome CRISPR screening and pan-cancer genetic dependency mapping to identify NAMPT and NMNAT1 as AML dependencies governing NAD+ biosynthesis. While both NAMPT and NMNAT1 were required for AML, the presence of NAD+ precursors bypassed the dependence of AML on NAMPT but not NMNAT1, pointing to NMNAT1 as a gatekeeper of NAD+ biosynthesis. Deletion of NMNAT1 reduced nuclear NAD+, activated p53, and increased venetoclax sensitivity. Conversely, increased NAD+ biosynthesis promoted venetoclax resistance. Unlike leukemia stem cells (LSCs) in both murine and human AML xenograft models, NMNAT1 was dispensable for hematopoietic stem cells and hematopoiesis. Our findings identify NMNAT1 as a previously unidentified therapeutic target that maintains NAD+ for AML progression and chemoresistance.
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Affiliation(s)
- Xiangguo Shi
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yajian Jiang
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ayumi Kitano
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Tianyuan Hu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Rebecca L Murdaugh
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yuan Li
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
- School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Kevin A Hoegenauer
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Rui Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Koichi Takahashi
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Daisuke Nakada
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
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12
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He C, Han S, Chang Y, Wu M, Zhao Y, Chen C, Chu X. CRISPR screen in cancer: status quo and future perspectives. Am J Cancer Res 2021; 11:1031-1050. [PMID: 33948344 PMCID: PMC8085856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 01/19/2021] [Indexed: 06/12/2023] Open
Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR) system offers a powerful platform for genome manipulation, including protein-coding genes, noncoding RNAs and regulatory elements. The development of CRISPR screen enables high-throughput interrogation of gene functions in diverse tumor biologies, such as tumor growth, metastasis, synthetic lethal interactions, therapeutic resistance and immunotherapy response, which are mostly performed in vitro or in transplant models. Recently, direct in vivo CRISPR screens have been developed to identify drivers of tumorigenesis in native microenvironment. Key parameters of CRISPR screen are constantly being optimized to achieve higher targeting efficiency and lower off-target effect. Here, we review the recent advances of CRISPR screen in cancer studies both in vitro and in vivo, with a particular focus on identifying cancer immunotherapy targets, and propose optimizing strategies and future perspectives for CRISPR screen.
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Affiliation(s)
- Chenglong He
- Department of Medical Oncology, Jinling Hospital, The First School of Clinical Medicine, Southern Medical UniversityNanjing 210002, China
| | - Siqi Han
- Department of Medical Oncology, Jinling Hospital, The First School of Clinical Medicine, Southern Medical UniversityNanjing 210002, China
| | - Yue Chang
- Department of Medical Oncology, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing 210002, China
| | - Meijuan Wu
- Department of Medical Oncology, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing 210002, China
| | - Yulu Zhao
- Department of Medical Oncology, Jinling Hospital, Nanjing Medical UniversityNanjing 210002, China
| | - Cheng Chen
- Department of Medical Oncology, Jinling Hospital, The First School of Clinical Medicine, Southern Medical UniversityNanjing 210002, China
- Department of Medical Oncology, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing 210002, China
| | - Xiaoyuan Chu
- Department of Medical Oncology, Jinling Hospital, The First School of Clinical Medicine, Southern Medical UniversityNanjing 210002, China
- Department of Medical Oncology, Jinling Hospital, School of Medicine, Nanjing UniversityNanjing 210002, China
- Department of Medical Oncology, Jinling Hospital, Nanjing Medical UniversityNanjing 210002, China
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13
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Prdm16 is a critical regulator of adult long-term hematopoietic stem cell quiescence. Proc Natl Acad Sci U S A 2020; 117:31945-31953. [PMID: 33268499 DOI: 10.1073/pnas.2017626117] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Regulation of quiescence is critical for the maintenance of adult hematopoietic stem cells (HSCs). Disruption of transcription factor gene Prdm16 during mouse embryonic development has been shown to cause a severe loss of fetal liver HSCs; however, the underlying mechanisms and the function of Prdm16 in adult HSCs remain unclear. To investigate the role of Prdm16 in adult HSCs, we generated a novel conditional knockout mouse model and deleted Prdm16 in adult mouse hematopoietic system using the IFN-inducible Mx1-Cre Our results show that Prdm16 deletion in the adult mouse hematopoietic system has a less severe effect on HSCs, causing a gradual decline of adult HSC numbers and a concomitant increase in the multipotent progenitor (MPP) compartment. Prdm16 deletion in the hematopoietic system following transplantation produced the same phenotype, indicating that the defect is intrinsic to adult HSCs. This HSC loss was also exacerbated by stress induced by 5-fluorouracil injections. Annexin V staining showed no difference in apoptosis between wild-type and knockout adult HSCs. In contrast, Bromodeoxyuridine analysis revealed that loss of Prdm16 significantly increased cycling of long-term HSCs (LT-HSCs) with the majority of the cells found in the S to G2/M phase. Consistently, RNA sequencing analysis of mouse LT-HSCs with and without Prdm16 deletion showed that Prdm16 loss induced a significant decrease in the expression of several known cell cycle regulators of HSCs, among which Cdkn1a and Egr1 were identified as direct targets of Prdm16 Our results suggest that Prdm16 preserves the function of adult LT-HSCs by promoting their quiescence.
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14
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Nasser MI, Qi X, Zhu S, He Y, Zhao M, Guo H, Zhu P. Current situation and future of stem cells in cardiovascular medicine. Biomed Pharmacother 2020; 132:110813. [PMID: 33068940 DOI: 10.1016/j.biopha.2020.110813] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/22/2020] [Accepted: 09/25/2020] [Indexed: 12/21/2022] Open
Abstract
Cardiovascular disease (CVD) is one of the leading causes of death worldwide. Currently, many methods have been proposed by researchers for the prevention and treatment of CVD; among them, stem cell-based therapies are the most promising. As the cells of origin for various mature cells, stem cells have the ability to self-renew and differentiate. Stem cells have a powerful ability to regenerate biologically, self-repair, and enhance damaged functional tissues or organs. Allogeneic stem cells and somatic stem cells are two types of cells that can be used for cardiac repair. Theoretically, dilated cardiomyopathy and acute myocardial infarction can be treated with such cells. In addition, stem cell transplantation procedures, including intravenous, epicardial, cardiac, and endocardial injections, have been reported to provide significant benefits in clinical practice; however, there are still a number of issues that need further study and consideration, such as the form and quantity of transplanted cells and post-transplantation health. The goal of this analysis was to summarize the recent advances in stem cell-based therapies and their efficacy in cardiovascular regenerative medicine.
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Affiliation(s)
- M I Nasser
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510100, China. Address: 106 Zhongshan Er Road, Guangzhou, 510080, PR China
| | - Xiao Qi
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510100, China. Address: 106 Zhongshan Er Road, Guangzhou, 510080, PR China
| | - Shuoji Zhu
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510100, China. Address: 106 Zhongshan Er Road, Guangzhou, 510080, PR China
| | - Yin He
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510100, China. Address: 106 Zhongshan Er Road, Guangzhou, 510080, PR China
| | - Mingyi Zhao
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510100, China. Address: 106 Zhongshan Er Road, Guangzhou, 510080, PR China
| | - Huiming Guo
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510100, China. Address: 106 Zhongshan Er Road, Guangzhou, 510080, PR China
| | - Ping Zhu
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510100, China. Address: 106 Zhongshan Er Road, Guangzhou, 510080, PR China.
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15
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Batista-Gomes JA, Mello FAR, de Oliveira EHC, de Souza MPC, Wanderley AV, da Costa Pantoja L, dos Santos NPC, Khayat BCM, Khayat AS. Identifying novel genetic alterations in pediatric acute lymphoblastic leukemia based on copy number analysis. Mol Cytogenet 2020; 13:25. [PMID: 32607130 PMCID: PMC7320540 DOI: 10.1186/s13039-020-00491-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 06/08/2020] [Indexed: 11/12/2022] Open
Abstract
Copy number variations (CNVs) analysis may reveal molecular biomarkers and provide information on the pathogenesis of acute lymphoblastic leukemia (ALL). We investigated the gene copy number in childhood ALL by microarray and select three new recurrent CNVs to evaluate by real-time PCR assay: DMBT1, KIAA0125 and PRDM16 were selected due to high frequency of CNVs in ALL samples and based on their potential biological functions in carcinogenesis described in the literature. DBMT1 deletion was associated with patients with chromosomal translocations and is a potential tumor suppressor; KIAA0125 and PRDM16 may act as an oncogene despite having a paradoxical behavior in carcinogenesis. This study reinforces that microarrays/aCGH is it is a powerful tool for detection of genomic aberrations, which may be used in the risk stratification.
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16
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Jiang Y, Hu T, Wang T, Shi X, Kitano A, Eagle K, Hoegenauer KA, Konopleva MY, Lin CY, Young NL, Nakada D. AMP-activated protein kinase links acetyl-CoA homeostasis to BRD4 recruitment in acute myeloid leukemia. Blood 2019; 134:2183-2194. [PMID: 31697807 PMCID: PMC6908829 DOI: 10.1182/blood.2019001076] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 09/30/2019] [Indexed: 12/15/2022] Open
Abstract
Altered metabolism fuels 2 hallmark properties of cancer cells: unlimited proliferation and differentiation blockade. Adenosine monophosphate-activated protein kinase (AMPK) is a master regulator of bioenergetics crucial for glucose metabolism in acute myeloid leukemia (AML), and its inhibition delays leukemogenesis, but whether the metabolic function of AMPK alters the AML epigenome remains unknown. Here, we demonstrate that AMPK maintains the epigenome of MLL-rearranged AML by linking acetyl-coenzyme A (CoA) homeostasis to Bromodomain and Extra-Terminal domain (BET) protein recruitment to chromatin. AMPK deletion reduced acetyl-CoA and histone acetylation, displacing BET proteins from chromatin in leukemia-initiating cells. In both mouse and patient-derived xenograft AML models, treating with AMPK and BET inhibitors synergistically suppressed AML. Our results provide a therapeutic rationale to target AMPK and BET for AML therapy.
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Affiliation(s)
| | | | - Tao Wang
- Verna & Marrs McLean Department of Biochemistry & Molecular Biology, and
| | | | | | | | | | - Marina Y Konopleva
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Nicolas L Young
- Verna & Marrs McLean Department of Biochemistry & Molecular Biology, and
| | - Daisuke Nakada
- Program in Developmental Biology
- Department of Molecular and Human Genetics
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