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Targeting Pim kinases in hematological cancers: molecular and clinical review. Mol Cancer 2023; 22:18. [PMID: 36694243 PMCID: PMC9875428 DOI: 10.1186/s12943-023-01721-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 01/13/2023] [Indexed: 01/26/2023] Open
Abstract
Decades of research has recognized a solid role for Pim kinases in lymphoproliferative disorders. Often up-regulated following JAK/STAT and tyrosine kinase receptor signaling, Pim kinases regulate cell proliferation, survival, metabolism, cellular trafficking and signaling. Targeting Pim kinases represents an interesting approach since knock-down of Pim kinases leads to non-fatal phenotypes in vivo suggesting clinical inhibition of Pim may have less side effects. In addition, the ATP binding site offers unique characteristics that can be used for the development of small inhibitors targeting one or all Pim isoforms. This review takes a closer look at Pim kinase expression and involvement in hematopoietic cancers. Current and past clinical trials and in vitro characterization of Pim kinase inhibitors are examined and future directions are discussed. Current studies suggest that Pim kinase inhibition may be most valuable when accompanied by multi-drug targeting therapy.
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2
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He H, Zhang J, Qu Y, Wang Y, Zhang Y, Yan X, Li Y, Zhang R. Novel tumor-suppressor FOXN3 is downregulated in adult acute myeloid leukemia. Oncol Lett 2019; 18:1521-1529. [PMID: 31423219 DOI: 10.3892/ol.2019.10424] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 02/28/2019] [Indexed: 12/31/2022] Open
Abstract
Forkhead box protein N3 (FOXN3) is a transcriptional repressor involved in cell cycle regulation and tumorigenesis. Abnormalities in gene structure and epigenetics of FOXN3 are closely associated with the occurrence of hematological malignancies; however, its involvement in the pathogenesis of acute myeloid leukemia (AML) remains unknown. The present study aimed to examine the potential significance of FOXN3 in AML. FOXN3 expression levels were examined in patients with AML and AML cell lines, and its clinical significance in AML was evaluated. FOXN3-overexpressing AML cell lines were established, and the biological function of FOXN3 was detected by flow cytometry and a Cell Counting Kit-8 assay. A significant decrease in FOXN3 expression levels was observed in patients with AML and in the AML cell lines in vitro. FOXN3 expression levels were associated with the number of leukocytes in patients. FOXN3 overexpression may inhibit cell proliferation in AML cell lines, induce cell cycle S-phase arrest and promote apoptosis in OCI-AML3 and THP-AML cells. The present study provided insight into how FOXN3 may serve as a novel tumor suppressor in AML.
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Affiliation(s)
- Hang He
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Jinjing Zhang
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Yi Qu
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Yue Wang
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Yan Zhang
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Xiaojing Yan
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Yan Li
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Rui Zhang
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
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3
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A novel, dual pan-PIM/FLT3 inhibitor SEL24 exhibits broad therapeutic potential in acute myeloid leukemia. Oncotarget 2018; 9:16917-16931. [PMID: 29682194 PMCID: PMC5908295 DOI: 10.18632/oncotarget.24747] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 02/24/2018] [Indexed: 11/25/2022] Open
Abstract
Fms-like tyrosine kinase 3 internal tandem duplication (FLT3-ITD) is one of the most common genetic lesions in acute myeloid leukemia patients (AML). Although FLT3 tyrosine kinase inhibitors initially exhibit clinical activity, resistance to treatment inevitably occurs within months. PIM kinases are thought to be major drivers of the resistance phenotype and their inhibition in relapsed samples restores cell sensitivity to FLT3 inhibitors. Thus, simultaneous PIM and FLT3 inhibition represents a promising strategy in AML therapy. For such reasons, we have developed SEL24-B489 - a potent, dual PIM and FLT3-ITD inhibitor. SEL24-B489 exhibited significantly broader on-target activity in AML cell lines and primary AML blasts than selective FLT3-ITD or PIM inhibitors. SEL24-B489 also demonstrated marked activity in cells bearing FLT3 tyrosine kinase domain (TKD) mutations that lead to FLT3 inhibitor resistance. Moreover, SEL24-B489 inhibited the growth of a broad panel of AML cell lines in xenograft models with a clear pharmacodynamic-pharmacokinetic relationship. Taken together, our data highlight the unique dual activity of the SEL24-B489 that abrogates the activity of signaling circuits involved in proliferation, inhibition of apoptosis and protein translation/metabolism. These results underscore the therapeutic potential of the dual PIM/FLT3-ITD inhibitor for the treatment of AML.
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Sun H, Cao J, Zhao L, Zhu S, Chen S, Li Y, Zhao B, Zhao T. PIM2 regulates stemness through phosphorylation of 4E-BP1. Sci Bull (Beijing) 2017; 62:679-685. [PMID: 36659438 DOI: 10.1016/j.scib.2017.04.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 04/12/2017] [Accepted: 04/12/2017] [Indexed: 01/21/2023]
Abstract
Embryonic stem cells (ESCs) can undergo unlimited self-renewal and maintain pluripotency to differentiate into any cell type of the three germ layers. Extensive studies have shown ESC identity is regulated by transcription factors, epigenetic regulators and multiple signal transduction pathways. However, the kinase regulation of pluripotency is not well understood. Here we show that the serine/threonine kinase PIM2, which is highly expressed in ESCs but not in somatic cells, functions as a crucial stemness regulator in ESCs. Knockout of Pim2 inhibits the self-renewal and differentiation capability of ESCs. Mechanistic studies identified that PIM2 can directly phosphorylate 4E-BP1, leading to release of eIF4E which facilitates the translation of pluripotent genes in ESCs. Our study highlights a novel kinase cascade pathway for ESC identity maintenance.
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Affiliation(s)
- Hongyan Sun
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiani Cao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Lin Zhao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; Chinese Medicine Hospital in Linyi City, Linyi 276600, China
| | - Shaohua Zhu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Shenghui Chen
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yaqiong Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bin Zhao
- Life Sciences Institute, Zhejiang University, Hangzhou 310058, China
| | - Tongbiao Zhao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
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Hospital MA, Green AS, Maciel TT, Moura IC, Leung AY, Bouscary D, Tamburini J. FLT3 inhibitors: clinical potential in acute myeloid leukemia. Onco Targets Ther 2017; 10:607-615. [PMID: 28223820 PMCID: PMC5304990 DOI: 10.2147/ott.s103790] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Acute myeloid leukemia (AML) is an aggressive hematopoietic malignancy that is cured in as few as 15%–40% of cases. Tremendous improvements in AML prognostication arose from a comprehensive analysis of leukemia cell genomes. Among normal karyotype AML cases, mutations in the FLT3 gene are the ones most commonly detected as having a deleterious prognostic impact. FLT3 is a transmembrane tyrosine kinase receptor, and alterations of the FLT3 gene such as internal tandem duplications (FLT3-ITD) deregulate FLT3 downstream signaling pathways in favor of increased cell proliferation and survival. FLT3 tyrosine kinase inhibitors (TKI) emerged as a new therapeutic option in FLT3-ITD AML, and clinical trials are ongoing with a variety of TKI either alone, combined with chemotherapy, or even as maintenance after allogenic stem cell transplantation. However, a wide range of molecular resistance mechanisms are activated upon TKI therapy, thus limiting their clinical impact. Massive research efforts are now ongoing to develop more efficient FLT3 TKI and/or new therapies targeting these resistance mechanisms to improve the prognosis of FLT3-ITD AML patients in the future.
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Affiliation(s)
- Marie-Anne Hospital
- Département Développement, Reproduction, Cancer, Institut Cochin, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR) 8104, Institut National de la Santé et de la Recherche Médicale (INSERM) U1016; Faculté de Médecine Sorbonne Paris Cité, Université Paris Descartes; Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC)
| | - Alexa S Green
- Département Développement, Reproduction, Cancer, Institut Cochin, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR) 8104, Institut National de la Santé et de la Recherche Médicale (INSERM) U1016; Faculté de Médecine Sorbonne Paris Cité, Université Paris Descartes; Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC)
| | - Thiago T Maciel
- INSERM UMR 1163, Laboratory of Cellular and Molecular Mechanisms of Hematological Disorders and Therapeutic Implications; Paris Descartes - Sorbonne Paris Cité University; CNRS ERL 8254, Imagine Institute; Laboratory of Excellence GR-Ex, Paris, France
| | - Ivan C Moura
- INSERM UMR 1163, Laboratory of Cellular and Molecular Mechanisms of Hematological Disorders and Therapeutic Implications; Paris Descartes - Sorbonne Paris Cité University; CNRS ERL 8254, Imagine Institute; Laboratory of Excellence GR-Ex, Paris, France
| | - Anskar Y Leung
- Department of Medicine, Division of Hematology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, People's Republic of China
| | - Didier Bouscary
- Département Développement, Reproduction, Cancer, Institut Cochin, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR) 8104, Institut National de la Santé et de la Recherche Médicale (INSERM) U1016; Faculté de Médecine Sorbonne Paris Cité, Université Paris Descartes; Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC)
| | - Jerome Tamburini
- Département Développement, Reproduction, Cancer, Institut Cochin, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR) 8104, Institut National de la Santé et de la Recherche Médicale (INSERM) U1016; Faculté de Médecine Sorbonne Paris Cité, Université Paris Descartes; Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC)
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Zhao YQ, Yin YQ, Liu J, Wang GH, Huang J, Zhu LJ, Wang JH. Characterization of HJ-PI01 as a novel Pim-2 inhibitor that induces apoptosis and autophagic cell death in triple-negative human breast cancer. Acta Pharmacol Sin 2016; 37:1237-50. [PMID: 27397540 DOI: 10.1038/aps.2016.60] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Accepted: 04/21/2016] [Indexed: 02/05/2023] Open
Abstract
AIM Pim-2 is a short-lived serine/threonine kinase, which plays a key role in metastasis of breast cancer through persistent activation of STAT3. Although the crystal structure of Pim-2 has been reported, but thus far no specific Pim-2-targeted compounds have been reported. In this study, we identified a novel Pim-2 inhibitor, HJ-PI01, by in silico analysis and experimental validation. METHODS The protein-protein interaction (PPI) network, chemical synthesis, molecular docking, and molecular dynamics (MD) simulations were used to design and discover the new Pim-2 inhibitor HJ-PI01. The anti-tumor effects of HJ-PI01 were evaluated in human breast MDA-MB-231, MDA-MB-468, MDA-MB-436, MCF-7 cells in vitro and in MDA-MB-231 xenograft mice, which were treated with HJ-PI01 (40 mg·kg(-1)·d(-1), ig) with or without lienal polypeptide (50 mg·kg(-1)·d(-1), ip) for 10 d. The apoptosis/autophage-inducing mechanisms of HJ-PI01 were elucidated using Western blots, immunoblots, flow cytometry, transmission electron microscopy and fluorescence microscopy. RESULTS Based on the PrePPI network, the potential partners interacting with Pim-2 in regulating apoptosis (160 protein pairs) and autophagy (47 protein pairs) were identified. Based on the structural characteristics of Pim-2, a total of 15 compounds (HJ-PI01 to HJ-P015) were synthesized, which showed moderate or remarkable anti-proliferative potency in the human breast cancer cell lines tested. The most effective compound HJ-PI01 exerted a robust inhibition on MDA-MB-231 cells compared with chlorpromazine and the pan-Pim inhibitor PI003. Molecular dynamics (MD) simulation revealed that HJ-PI01 had a good binding score with Pim-2. Moreover, HJ-PI01 (300 nmol/L) induced death receptor-dependent and mitochondrial apoptosis as well as autophagic death in MDA-MB-231 cells. In MDA-MB-231 xenograft mice, administration of HJ-PI01 remarkably inhibited the tumor growth and induced tumor cell apoptosis in vivo. Co-administration of HJ-PI01 with lienal polypeptide could improve the anti-tumor activity of HJ-PI01 and reduce its toxicity. CONCLUSION The newly synthesized compound, HJ-PI01, can induce death receptor/mitochondrial apoptosis and autophagic cell death by targeting Pim-2 in human breast cancer cells in vitro and in vivo.
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Control of Pim2 kinase stability and expression in transformed human haematopoietic cells. Biosci Rep 2015; 35:BSR20150217. [PMID: 26500282 PMCID: PMC4672348 DOI: 10.1042/bsr20150217] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 10/05/2015] [Indexed: 01/02/2023] Open
Abstract
The oncogenic Pim2 kinase is overexpressed in several haematological malignancies, such as multiple myeloma and acute myeloid leukaemia (AML), and constitutes a strong therapeutic target candidate. Like other Pim kinases, Pim2 is constitutively active and is believed to be essentially regulated through its accumulation. We show that in leukaemic cells, the three Pim2 isoforms have dramatically short half-lives although the longer isoform is significantly more stable than the shorter isoforms. All isoforms present a cytoplasmic localization and their degradation was neither modified by broad-spectrum kinase or phosphatase inhibitors such as staurosporine or okadaic acid nor by specific inhibition of several intracellular signalling pathways including Erk, Akt and mTORC1. Pim2 degradation was inhibited by proteasome inhibitors but Pim2 ubiquitination was not detected even by blocking both proteasome activity and protein de-ubiquitinases (DUBs). Moreover, Pyr41, an ubiquitin-activating enzyme (E1) inhibitor, did not stabilize Pim2, strongly suggesting that Pim2 was degraded by the proteasome without ubiquitination. In agreement, we observed that purified 20S proteasome particles could degrade Pim2 molecule in vitro. Pim2 mRNA accumulation in UT7 cells was controlled by erythropoietin (Epo) through STAT5 transcription factors. In contrast, the translation of Pim2 mRNA was not regulated by mTORC1. Overall, our results suggest that Pim2 is only controlled by its mRNA accumulation level. Catalytically active Pim2 accumulated in proteasome inhibitor-treated myeloma cells. We show that Pim2 inhibitors and proteasome inhibitors, such as bortezomib, have additive effects to inhibit the growth of myeloma cells, suggesting that Pim2 could be an interesting target for the treatment of multiple myeloma.
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8
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Green AS, Maciel TT, Hospital MA, Yin C, Mazed F, Townsend EC, Pilorge S, Lambert M, Paubelle E, Jacquel A, Zylbersztejn F, Decroocq J, Poulain L, Sujobert P, Jacque N, Adam K, So JCC, Kosmider O, Auberger P, Hermine O, Weinstock DM, Lacombe C, Mayeux P, Vanasse GJ, Leung AY, Moura IC, Bouscary D, Tamburini J. Pim kinases modulate resistance to FLT3 tyrosine kinase inhibitors in FLT3-ITD acute myeloid leukemia. SCIENCE ADVANCES 2015; 1:e1500221. [PMID: 26601252 PMCID: PMC4643770 DOI: 10.1126/sciadv.1500221] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 06/30/2015] [Indexed: 05/12/2023]
Abstract
Fms-like tyrosine kinase 3 internal tandem duplication (FLT3-ITD) is frequently detected in acute myeloid leukemia (AML) patients and is associated with a dismal long-term prognosis. FLT3 tyrosine kinase inhibitors provide short-term disease control, but relapse invariably occurs within months. Pim protein kinases are oncogenic FLT3-ITD targets expressed in AML cells. We show that increased Pim kinase expression is found in relapse samples from AML patients treated with FLT3 inhibitors. Ectopic Pim-2 expression induces resistance to FLT3 inhibition in both FLT3-ITD-induced myeloproliferative neoplasm and AML models in mice. Strikingly, we found that Pim kinases govern FLT3-ITD signaling and that their pharmacological or genetic inhibition restores cell sensitivity to FLT3 inhibitors. Finally, dual inhibition of FLT3 and Pim kinases eradicates FLT3-ITD(+) cells including primary AML cells. Concomitant Pim and FLT3 inhibition represents a promising new avenue for AML therapy.
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Affiliation(s)
- Alexa S. Green
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
- Department of Hematology, Charles Nicolle University Hospital, Rouen 76000, France
| | - Thiago T. Maciel
- INSERM UMR 1163, Laboratory of cellular and molecular mechanisms of hematological disorders and therapeutic implications, Paris 75015, France
- Imagine Institute, Paris Descartes–Sorbonne Paris Cité University, Paris 75015, France
- CNRS ERL 8254, Paris 75015, France
- Laboratory of Excellence GR-Ex, Paris 75015 , France
| | - Marie-Anne Hospital
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Chae Yin
- Division of Hematology, Department of Medicine, Li Ka Shing (LKS) Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Fetta Mazed
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Elizabeth C. Townsend
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston 02115, MA 02115, USA
| | - Sylvain Pilorge
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
- INSERM U1065/C3M Team 2, Cell Death Differentiation Inflammation and Cancer, Nice 06204, France
| | - Mireille Lambert
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Etienne Paubelle
- INSERM UMR 1163, Laboratory of cellular and molecular mechanisms of hematological disorders and therapeutic implications, Paris 75015, France
- Imagine Institute, Paris Descartes–Sorbonne Paris Cité University, Paris 75015, France
- CNRS ERL 8254, Paris 75015, France
- Laboratory of Excellence GR-Ex, Paris 75015 , France
| | - Arnaud Jacquel
- INSERM U1065/C3M Team 2, Cell Death Differentiation Inflammation and Cancer, Nice 06204, France
| | - Florence Zylbersztejn
- INSERM UMR 1163, Laboratory of cellular and molecular mechanisms of hematological disorders and therapeutic implications, Paris 75015, France
- Imagine Institute, Paris Descartes–Sorbonne Paris Cité University, Paris 75015, France
- CNRS ERL 8254, Paris 75015, France
- Laboratory of Excellence GR-Ex, Paris 75015 , France
| | - Justine Decroocq
- INSERM UMR 1163, Laboratory of cellular and molecular mechanisms of hematological disorders and therapeutic implications, Paris 75015, France
- Imagine Institute, Paris Descartes–Sorbonne Paris Cité University, Paris 75015, France
- CNRS ERL 8254, Paris 75015, France
- Laboratory of Excellence GR-Ex, Paris 75015 , France
| | - Laury Poulain
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Pierre Sujobert
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Nathalie Jacque
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Kevin Adam
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Jason C. C. So
- Division of Hematology, Department of Medicine, Li Ka Shing (LKS) Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Olivier Kosmider
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Patrick Auberger
- INSERM U1065/C3M Team 2, Cell Death Differentiation Inflammation and Cancer, Nice 06204, France
| | - Olivier Hermine
- INSERM UMR 1163, Laboratory of cellular and molecular mechanisms of hematological disorders and therapeutic implications, Paris 75015, France
- Imagine Institute, Paris Descartes–Sorbonne Paris Cité University, Paris 75015, France
- CNRS ERL 8254, Paris 75015, France
- Laboratory of Excellence GR-Ex, Paris 75015 , France
| | - David M. Weinstock
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston 02115, MA 02115, USA
| | - Catherine Lacombe
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Patrick Mayeux
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Gary J. Vanasse
- Novartis Institutes for BioMedical Research, Cambridge, MA 02139, USA
| | - Anskar Y. Leung
- Division of Hematology, Department of Medicine, Li Ka Shing (LKS) Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Ivan C. Moura
- INSERM UMR 1163, Laboratory of cellular and molecular mechanisms of hematological disorders and therapeutic implications, Paris 75015, France
- Imagine Institute, Paris Descartes–Sorbonne Paris Cité University, Paris 75015, France
- CNRS ERL 8254, Paris 75015, France
- Laboratory of Excellence GR-Ex, Paris 75015 , France
| | - Didier Bouscary
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
| | - Jerome Tamburini
- Institut Cochin, Département Développement, Reproduction, Cancer, CNRS, UMR 8104, INSERM U1016, Paris 75014, France
- Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris 75005, France
- Equipe Labellisée, Ligue Nationale Contre le Cancer (LNCC), Paris 75013, France
- Corresponding author. E-mail:
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Xu J, Zhang T, Wang T, You L, Zhao Y. PIM kinases: an overview in tumors and recent advances in pancreatic cancer. Future Oncol 2014; 10:865-76. [PMID: 24799066 DOI: 10.2217/fon.13.229] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The PIM kinases represent a family of serine/threonine kinases, which is composed of three different members (PIM1, PIM2 and PIM3). Aberrant expression of PIM kinases is observed in variety of tumors, including pancreatic cancer. The PIM kinases play pivotal roles in the regulation of cell cycle, apoptosis, properties of stem cells, metabolism, autophagy, drug resistance and targeted therapy. The roles of PIM kinases in pancreatic cancer include the regulation of proliferation, apoptosis, cell cycle, formation, angiogenesis and prediction prognosis. Blocking the activities of PIM kinases could prevent pancreatic cancer development. PIM kinases may be a novel target for cancer therapy.
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Affiliation(s)
- Jianwei Xu
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100730, China
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Maintenance of leukemia-initiating cells is regulated by the CDK inhibitor Inca1. PLoS One 2014; 9:e115578. [PMID: 25525809 PMCID: PMC4272264 DOI: 10.1371/journal.pone.0115578] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 12/01/2014] [Indexed: 11/19/2022] Open
Abstract
Functional differences between healthy progenitor and cancer initiating cells may provide unique opportunities for targeted therapy approaches. Hematopoietic stem cells are tightly controlled by a network of CDK inhibitors that govern proliferation and prevent stem cell exhaustion. Loss of Inca1 led to an increased number of short-term hematopoietic stem cells in older mice, but Inca1 seems largely dispensable for normal hematopoiesis. On the other hand, Inca1-deficiency enhanced cell cycling upon cytotoxic stress and accelerated bone marrow exhaustion. Moreover, AML1-ETO9a-induced proliferation was not sustained in Inca1-deficient cells in vivo. As a consequence, leukemia induction and leukemia maintenance were severely impaired in Inca1−/− bone marrow cells. The re-initiation of leukemia was also significantly inhibited in absence of Inca1−/− in MLL—AF9- and c-myc/BCL2-positive leukemia mouse models. These findings indicate distinct functional properties of Inca1 in normal hematopoietic cells compared to leukemia initiating cells. Such functional differences might be used to design specific therapy approaches in leukemia.
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11
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Deletion of Pim kinases elevates the cellular levels of reactive oxygen species and sensitizes to K-Ras-induced cell killing. Oncogene 2014; 34:3728-36. [PMID: 25241892 PMCID: PMC4369476 DOI: 10.1038/onc.2014.306] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 08/05/2014] [Accepted: 08/13/2014] [Indexed: 02/08/2023]
Abstract
The Pim protein kinases contribute to transformation by enhancing the activity of oncogenic Myc and Ras, which drives significant metabolic changes during tumorigenesis. In this report, we demonstrate that mouse embryo fibroblasts (MEFs) lacking all three isoforms of Pim protein kinases, triple knockout (TKO), cannot tolerate the expression of activated K-Ras (K-RasG12V) and undergo cell death. Transduction of K-RasG12V into these cells markedly increased the level of cellular reactive oxygen species (ROS). The addition of N-acetyl cysteine attenuates ROS production and reversed the cytotoxic effects of K-RasG12V in the TKO MEFs. The altered cellular redox state caused by the loss of Pim occurred as a result of lower levels of metabolic intermediates in the glycolytic and pentose phosphate pathways as well as abnormal mitochondrial oxidative phosphorylation. TKO MEFs exhibit reduced levels of superoxide dismutase (Sod), glutathione peroxidase 4 (Gpx4) and peroxiredoxin 3 (Prdx3) that render them susceptible to killing by K-RasG12V-mediated ROS production. In contrast, the transduction of c-Myc into TKO cells can overcome the lack of Pim protein kinases by regulating cellular metabolism and Sod2. In the absence of the Pim kinases, c-Myc transduction permitted K-RasG12V-induced cell growth by decreasing Ras-induced cellular ROS levels. These results demonstrate that the Pim protein kinases play an important role in regulating cellular redox, metabolism and K-Ras-stimulated cell growth.
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12
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Bäumer N, Krause A, Köhler G, Lettermann S, Evers G, Hascher A, Bäumer S, Berdel WE, Müller-Tidow C, Tickenbrock L. Proteinase-Activated Receptor 1 (PAR1) regulates leukemic stem cell functions. PLoS One 2014; 9:e94993. [PMID: 24740120 PMCID: PMC3989293 DOI: 10.1371/journal.pone.0094993] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Accepted: 03/21/2014] [Indexed: 12/30/2022] Open
Abstract
External signals that are mediated by specific receptors determine stem cell fate. The thrombin receptor PAR1 plays an important role in haemostasis, thrombosis and vascular biology, but also in tumor biology and angiogenesis. Its expression and function in hematopoietic stem cells is largely unknown. Here, we analyzed expression and function of PAR1 in primary hematopoietic cells and their leukemic counterparts. AML patients' blast cells expressed much lower levels of PAR1 mRNA and protein than CD34+ progenitor cells. Constitutive Par1-deficiency in adult mice did not affect engraftment or stem cell potential of hematopoietic cells. To model an AML with Par1-deficiency, we retrovirally introduced the oncogene MLL-AF9 in wild type and Par1−/− hematopoietic progenitor cells. Par1-deficiency did not alter initial leukemia development. However, the loss of Par1 enhanced leukemic stem cell function in vitro and in vivo. Re-expression of PAR1 in Par1−/− leukemic stem cells delayed leukemogenesis in vivo. These data indicate that Par1 contributes to leukemic stem cell maintenance.
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Affiliation(s)
- Nicole Bäumer
- Department of Medicine, Hematology/Oncology, University of Muenster, Muenster, Germany
| | - Annika Krause
- Department of Medicine, Hematology/Oncology, University of Muenster, Muenster, Germany
| | - Gabriele Köhler
- Gerhard Domagk Institute for Pathology, University of Muenster, Muenster, Germany
| | - Stephanie Lettermann
- Department of Medicine, Hematology/Oncology, University of Muenster, Muenster, Germany
| | - Georg Evers
- Department of Medicine, Hematology/Oncology, University of Muenster, Muenster, Germany
| | - Antje Hascher
- Hochschule Hamm-Lippstadt, University of Applied Science, Hamm, Germany
| | - Sebastian Bäumer
- Department of Medicine, Hematology/Oncology, University of Muenster, Muenster, Germany
| | - Wolfgang E. Berdel
- Department of Medicine, Hematology/Oncology, University of Muenster, Muenster, Germany
| | - Carsten Müller-Tidow
- Department of Medicine, Hematology/Oncology, University of Muenster, Muenster, Germany
- Interdisciplinary Center for Clinical Research IZKF, University of Muenster, Muenster, Germany
- Dept. of Medicine IV, Hematology and Oncology, University of Halle, Halle, Germany
- * E-mail: (CMT); (LT)
| | - Lara Tickenbrock
- Department of Medicine, Hematology/Oncology, University of Muenster, Muenster, Germany
- Hochschule Hamm-Lippstadt, University of Applied Science, Hamm, Germany
- * E-mail: (CMT); (LT)
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Ostronoff F, Estey E. The role of quizartinib in the treatment of acute myeloid leukemia. Expert Opin Investig Drugs 2013; 22:1659-69. [PMID: 24070241 DOI: 10.1517/13543784.2013.842973] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Approximately one-third of the patients with acute myeloid leukemia (AML) harbor internal tandem duplication (ITD) in the gene encoding FMS-like tyrosine kinase 3 (FLT3-ITD), which is associated with poor prognosis. Over the course of the last decade, several FLT3 inhibitors have been developed. Nevertheless, the pharmacokinetic limitations of some of these compounds as well as their potency have limited their therapeutic efficacy. Quizartinib (AC220) is a second-generation FLT3 inhibitor that has shown promising activity in AML in Phase II clinical trials. AREAS COVERED The pharmacokinetic, mechanism of action and resistance as well as clinical studies of quizartinib in AML are reported here in detail. EXPERT OPINION Quizartinib is potent and selective FLT3 tyrosine kinase inhibitor with significant activity in both FLT3-mutant and wild-type AML. The quality and duration of achievable response thus far seen with this agent is suboptimal. Quizartinib in combination with chemotherapy might result in improved outcome and results of these trials are eagerly awaited. In addition, quizartinib in combination with other agents tackling the bone marrow microenvironment and FLT3 cooperative pathways may enhance response to quizartinib.
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Affiliation(s)
- Fabiana Ostronoff
- Fred Hutchinson Cancer Research Center , 1100 Fairview Ave N. D5-360, Seattle, WA 98109-1024 , USA +1 206 667 6045 ; +1 206 667-2324 ;
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14
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β2 integrin-derived signals induce cell survival and proliferation of AML blasts by activating a Syk/STAT signaling axis. Blood 2013; 121:3889-99, S1-66. [PMID: 23509157 DOI: 10.1182/blood-2012-09-457887] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Spleen tyrosine kinase (Syk) induces cell survival and proliferation in a high proportion of acute myeloid leukemia (AML) blasts, but the underlying molecular events of Syk signaling have not been investigated. Proteomic techniques have allowed us to identify the multiprotein complex that is nucleated by constitutively active Syk in AML cells. This complex differs from the B-lymphoid Syk interactome with respect to several proteins, especially the integrin receptor Mac-1, the Fc-γ receptor I (FcγRI), and the transcription factors STAT3 and STAT5. We show in several AML cell line models that tonic signals derived from the Fc-γ chain lead to Syk-dependent activation of STAT3 and STAT5, which in turn induces cell survival and proliferation. Moreover, stimulation of Mac-1 or FcγRI intensifies the constitutive Syk-mediated STAT3/5 activation in AML cells, a scenario likely to take place in the bone marrow niche. In accordance with these findings, we observed that β2 integrins, including Mac-1, trigger proliferation of AML cells in an AML cell/stroma coculture model. Taken together, we identified an oncogenic integrin/Syk/STAT3/5 signaling axis that might serve as a therapeutic target of AML in the future.
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15
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Blanco-Aparicio C, Carnero A. Pim kinases in cancer: diagnostic, prognostic and treatment opportunities. Biochem Pharmacol 2012; 85:629-643. [PMID: 23041228 DOI: 10.1016/j.bcp.2012.09.018] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 09/18/2012] [Accepted: 09/18/2012] [Indexed: 12/14/2022]
Abstract
PIM proteins belong to a family of ser/thr kinases composed of 3 members, PIM1, PIM2 and PIM3, with greatly overlapping functions. PIM kinases are mainly responsible for cell cycle regulation, antiapoptotic activity and the homing and migration of receptor tyrosine kinases mediated via the JAK/STAT pathway. PIM kinases have been found to be upregulated in many hematological malignancies and solid tumors. Although these kinases have been described as weak oncogenes, they are heavily targeted for anticancer drug discovery. The present review summarizes the discoveries made to date regarding PIM kinases as driving oncogenes in the process of tumorigenesis and their validation as drug targets.
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Affiliation(s)
- Carmen Blanco-Aparicio
- Experimental Therapeutics Programme, Spanish National Cancer Research Centre, Madrid, Spain
| | - Amancio Carnero
- Instituto de Biomedicina de Sevilla (IBiS), HUVR/CSIC/Universidad de Sevilla, Sevilla, Spain; Consejo Superior de Investigaciones Cientificas, Spain.
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16
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Abstract
The PIM genes represent a family of proto-oncogenes that encode three different serine/threonine protein kinases (PIM1, PIM2 and PIM3) with essential roles in the regulation of signal transduction cascades, which promote cell survival, proliferation and drug resistance. PIM kinases are overexpressed in several hematopoietic tumors and support in vitro and in vivo malignant cell growth and survival, through cell cycle regulation and inhibition of apoptosis. PIM kinases do not have an identified regulatory domain, which means that these proteins are constitutively active once transcribed. They appear to be critical downstream effectors of important oncoproteins and, when overexpressed, can mediate drug resistance to available agents, such as rapamycin. Recent crystallography studies reveal that, unlike other kinases, they possess a hinge region, which creates a unique binding pocket for ATP, offering a target for an increasing number of potent small-molecule PIM kinase inhibitors. Preclinical studies in models of various hematologic cancers indicate that these novel agents show promising activity and some of them are currently being evaluated in a clinical setting. In this review, we profile the PIM kinases as targets for therapeutics in hematologic malignancies.
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Affiliation(s)
- Yesid Alvarado
- Department of Hematology/Oncology, Cancer Therapy & Research Center, The University of Texas Health Science Center San Antonio, 7979 Wurzbach Road, MC8232, San Antonio, 78229, TX, USA
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Genome-wide analysis of histone H3 acetylation patterns in AML identifies PRDX2 as an epigenetically silenced tumor suppressor gene. Blood 2011; 119:2346-57. [PMID: 22207736 DOI: 10.1182/blood-2011-06-358705] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
With the use of ChIP on microarray assays in primary leukemia samples, we report that acute myeloid leukemia (AML) blasts exhibit significant alterations in histone H3 acetylation (H3Ac) levels at > 1000 genomic loci compared with CD34(+) progenitor cells. Importantly, core promoter regions tended to have lower H3Ac levels in AML compared with progenitor cells, which suggested that a large number of genes are epigenetically silenced in AML. Intriguingly, we identified peroxiredoxin 2 (PRDX2) as a novel potential tumor suppressor gene in AML. H3Ac was decreased at the PRDX2 gene promoter in AML, which correlated with low mRNA and protein expression. We also observed DNA hypermethylation at the PRDX2 promoter in AML. Low protein expression of the antioxidant PRDX2 gene was clinically associated with poor prognosis in patients with AML. Functionally, PRDX2 acted as inhibitor of myeloid cell growth by reducing levels of reactive oxygen species (ROS) generated in response to cytokines. Forced PRDX2 expression inhibited c-Myc-induced leukemogenesis in vivo on BM transplantation in mice. Taken together, epigenome-wide analyses of H3Ac in AML led to the identification of PRDX2 as an epigenetically silenced growth suppressor, suggesting a possible role of ROS in the malignant phenotype in AML.
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A potential therapeutic target for FLT3-ITD AML: PIM1 kinase. Leuk Res 2011; 36:224-31. [PMID: 21802138 DOI: 10.1016/j.leukres.2011.07.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Revised: 06/24/2011] [Accepted: 07/03/2011] [Indexed: 12/18/2022]
Abstract
Patients with acute myeloid leukemia (AML) and a FLT3 internal tandem duplication (ITD) mutation have a poor prognosis, and FLT3 inhibitors are now under clinical investigation. PIM1, a serine/threonine kinase, is up-regulated in FLT3-ITD AML and may be involved in FLT3-mediated leukemogenesis. We employed a PIM1 inhibitor, AR00459339 (Array Biopharma Inc.), to investigate the effect of PIM1 inhibition in FLT3-mutant AML. Like FLT3 inhibitors, AR00459339 was preferentially cytotoxic to FLT3-ITD cells, as demonstrated in the MV4-11, Molm-14, and TF/ITD cell lines, as well as 12 FLT3-ITD primary samples. Unlike FLT3 inhibitors, AR00459339 did not suppress phosphorylation of FLT3, but did promote the de-phosphorylation of downstream FLT3 targets, STAT5, AKT, and BAD. Combining AR00459339 with a FLT3 inhibitor resulted in additive to mildly synergistic cytotoxic effects. AR00459339 was cytotoxic to FLT3-ITD samples from patients with secondary resistance to FLT3 inhibitors, suggesting a novel benefit to combining these agents. We conclude that PIM1 appears to be closely associated with FLT3 signaling, and that inhibition of PIM1 may hold therapeutic promise, either as monotherapy, or by overcoming resistance to FLT3 inhibitors.
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19
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Bäumer N, Tickenbrock L, Tschanter P, Lohmeyer L, Diederichs S, Bäumer S, Skryabin BV, Zhang F, Agrawal-Singh S, Köhler G, Berdel WE, Serve H, Koschmieder S, Müller-Tidow C. Inhibitor of cyclin-dependent kinase (CDK) interacting with cyclin A1 (INCA1) regulates proliferation and is repressed by oncogenic signaling. J Biol Chem 2011; 286:28210-22. [PMID: 21540187 DOI: 10.1074/jbc.m110.203471] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The cell cycle is driven by the kinase activity of cyclin·cyclin-dependent kinase (CDK) complexes, which is negatively regulated by CDK inhibitor proteins. Recently, we identified INCA1 as an interaction partner and a substrate of cyclin A1 in complex with CDK2. On a functional level, we identified a novel cyclin-binding site in the INCA1 protein. INCA1 inhibited CDK2 activity and cell proliferation. The inhibitory effects depended on the cyclin-interacting domain. Mitogenic and oncogenic signals suppressed INCA1 expression, whereas it was induced by cell cycle arrest. We established a deletional mouse model that showed increased CDK2 activity in spleen with altered spleen architecture in Inca1(-/-) mice. Inca1(-/-) embryonic fibroblasts showed an increase in the fraction of S-phase cells. Furthermore, blasts from acute lymphoid leukemia and acute myeloid leukemia patients expressed significantly reduced INCA1 levels highlighting its relevance for growth control in vivo. Taken together, this study identifies a novel CDK inhibitor with reduced expression in acute myeloid and lymphoid leukemia. The molecular events that control the cell cycle occur in a sequential process to ensure a tight regulation, which is important for the survival of a cell and includes the detection and repair of genetic damage and the prevention of uncontrolled cell division.
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Affiliation(s)
- Nicole Bäumer
- Department of Medicine, Hematology/Oncology, University ofMvnster, 48129 Münster, Germany
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20
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Olaharski AJ, Bitter H, Gonzaludo N, Kondru R, Goldstein DM, Zabka TS, Lin H, Singer T, Kolaja K. Modeling bone marrow toxicity using kinase structural motifs and the inhibition profiles of small molecular kinase inhibitors. Toxicol Sci 2010; 118:266-75. [PMID: 20810542 DOI: 10.1093/toxsci/kfq258] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The cellular function of kinases combined with the difficulty of designing selective small molecule kinase inhibitors (SMKIs) poses a challenge for drug development. The late-stage attrition of SMKIs could be lessened by integrating safety information of kinases into the lead optimization stage of drug development. Herein, a mathematical model to predict bone marrow toxicity (BMT) is presented which enables the rational design of SMKIs away from this safety liability. A specific example highlights how this model identifies critical structural modifications to avoid BMT. The model was built using a novel algorithm, which selects 19 representative kinases from a panel of 277 based upon their ATP-binding pocket sequences and ability to predict BMT in vivo for 48 SMKIs. A support vector machine classifier was trained on the selected kinases and accurately predicts BMT with 74% accuracy. The model provides an efficient method for understanding SMKI-induced in vivo BMT earlier in drug discovery.
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21
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Hödar C, Assar R, Colombres M, Aravena A, Pavez L, González M, Martínez S, Inestrosa NC, Maass A. Genome-wide identification of new Wnt/beta-catenin target genes in the human genome using CART method. BMC Genomics 2010; 11:348. [PMID: 20515496 PMCID: PMC2996972 DOI: 10.1186/1471-2164-11-348] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2009] [Accepted: 06/01/2010] [Indexed: 11/21/2022] Open
Abstract
Background The importance of in silico predictions for understanding cellular processes is now widely accepted, and a variety of algorithms useful for studying different biological features have been designed. In particular, the prediction of cis regulatory modules in non-coding human genome regions represents a major challenge for understanding gene regulation in several diseases. Recently, studies of the Wnt signaling pathway revealed a connection with neurodegenerative diseases such as Alzheimer's. In this article, we construct a classification tool that uses the transcription factor binding site motifs composition of some gene promoters to identify new Wnt/β-catenin pathway target genes potentially involved in brain diseases. Results In this study, we propose 89 new Wnt/β-catenin pathway target genes predicted in silico by using a method based on multiple Classification and Regression Tree (CART) analysis. We used as decision variables the presence of transcription factor binding site motifs in the upstream region of each gene. This prediction was validated by RT-qPCR in a sample of 9 genes. As expected, LEF1, a member of the T-cell factor/lymphoid enhancer-binding factor family (TCF/LEF1), was relevant for the classification algorithm and, remarkably, other factors related directly or indirectly to the inflammatory response and amyloidogenic processes also appeared to be relevant for the classification. Among the 89 new Wnt/β-catenin pathway targets, we found a group expressed in brain tissue that could be involved in diverse responses to neurodegenerative diseases, like Alzheimer's disease (AD). These genes represent new candidates to protect cells against amyloid β toxicity, in agreement with the proposed neuroprotective role of the Wnt signaling pathway. Conclusions Our multiple CART strategy proved to be an effective tool to identify new Wnt/β-catenin pathway targets based on the study of their regulatory regions in the human genome. In particular, several of these genes represent a new group of transcriptional dependent targets of the canonical Wnt pathway. The functions of these genes indicate that they are involved in pathophysiology related to Alzheimer's disease or other brain disorders.
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Affiliation(s)
- Christian Hödar
- Laboratorio de Bioinformática y Expresión Génica, INTA, Universidad de Chile, Santiago, Chile.
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Pim2 cooperates with PML-RARalpha to induce acute myeloid leukemia in a bone marrow transplantation model. Blood 2010; 115:4507-16. [PMID: 20215640 DOI: 10.1182/blood-2009-03-210070] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Although the potential role of Pim2 as a cooperative oncogene has been well described in lymphoma, its role in leukemia has remained largely unexplored. Here we show that high expression of Pim2 is observed in patients with acute promyelocytic leukemia (APL). To further characterize the cooperative role of Pim2 with promyelocytic leukemia/retinoic acid receptor alpha (PML/RARalpha), we used a well-established PML-RARalpha (PRalpha) mouse model. Pim2 coexpression in PRalpha-positive hematopoietic progenitor cells (HPCs) induces leukemia in recipient mice after a short latency. Pim2-PRalpha cells were able to repopulate mice in serial transplantations and to induce disease in all recipients. Neither Pim2 nor PRalpha alone was sufficient to induce leukemia upon transplantation in this model. The disease induced by Pim2 overexpression in PRalpha cells contained a slightly higher fraction of immature myeloid cells, compared with the previously described APL disease induced by PRalpha. However, it also clearly resembled an APL-like phenotype and showed signs of differentiation upon all-trans retinoic acid (ATRA) treatment in vitro. These results support the hypothesis that Pim2, which is also a known target of Flt3-ITD (another gene that cooperates with PML-RARalpha), cooperates with PRalpha to induce APL-like disease.
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Brault L, Gasser C, Bracher F, Huber K, Knapp S, Schwaller J. PIM serine/threonine kinases in the pathogenesis and therapy of hematologic malignancies and solid cancers. Haematologica 2010; 95:1004-15. [PMID: 20145274 DOI: 10.3324/haematol.2009.017079] [Citation(s) in RCA: 285] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The identification as cooperating targets of Proviral Integrations of Moloney virus in murine lymphomas suggested early on that PIM serine/threonine kinases play an important role in cancer biology. Whereas elevated levels of PIM1 and PIM2 were mostly found in hematologic malignancies and prostate cancer, increased PIM3 expression was observed in different solid tumors. PIM kinases are constitutively active and their activity supports in vitro and in vivo tumor cell growth and survival through modification of an increasing number of common as well as isoform-specific substrates including several cell cycle regulators and apoptosis mediators. PIM1 but not PIM2 seems also to mediate homing and migration of normal and malignant hematopoietic cells by regulating chemokine receptor surface expression. Knockdown experiments by RNA interference or dominant-negative acting mutants suggested that PIM kinases are important for maintenance of a transformed phenotype and therefore potential therapeutic targets. Determination of the protein structure facilitated identification of an increasing number of potent small molecule PIM kinase inhibitors with in vitro and in vivo anticancer activity. Ongoing efforts aim to identify isoform-specific PIM inhibitors that would not only help to dissect the kinase function but hopefully also provide targeted therapeutics. Here, we summarize the current knowledge about the role of PIM serine/threonine kinases for the pathogenesis and therapy of hematologic malignancies and solid cancers, and we highlight structural principles and recent progress on small molecule PIM kinase inhibitors that are on their way into first clinical trials.
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Affiliation(s)
- Laurent Brault
- Department of Biomedicine, University Hospital Basel, Hebelstrasse 20, 4031 Basel, Switzerland
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24
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Bullock AN, Russo S, Amos A, Pagano N, Bregman H, Debreczeni JÉ, Lee WH, von Delft F, Meggers E, Knapp S. Crystal structure of the PIM2 kinase in complex with an organoruthenium inhibitor. PLoS One 2009; 4:e7112. [PMID: 19841674 PMCID: PMC2743286 DOI: 10.1371/journal.pone.0007112] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Accepted: 04/29/2009] [Indexed: 01/23/2023] Open
Abstract
Background The serine/threonine kinase PIM2 is highly expressed in human leukemia and lymphomas and has been shown to positively regulate survival and proliferation of tumor cells. Its diverse ATP site makes PIM2 a promising target for the development of anticancer agents. To date our knowledge of catalytic domain structures of the PIM kinase family is limited to PIM1 which has been extensively studied and which shares about 50% sequence identity with PIM2. Principal Findings Here we determined the crystal structure of PIM2 in complex with an organoruthenium complex (inhibition in sub-nanomolar level). Due to its extraordinary shape complementarity this stable organometallic compound is a highly potent inhibitor of PIM kinases. Significance The structure of PIM2 revealed several differences to PIM1 which may be explored further to generate isoform selective inhibitors. It has also demonstrated how an organometallic inhibitor can be adapted to the binding site of protein kinases to generate highly potent inhibitors. Enhanced version This article can also be viewed as an enhanced version in which the text of the article is integrated with interactive 3D representations and animated transitions. Please note that a web plugin is required to access this enhanced functionality. Instructions for the installation and use of the web plugin are available in Text S1.
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Affiliation(s)
- Alex N. Bullock
- University of Oxford, Structural Genomics Consortium, Oxford, United Kingdom
| | - Santina Russo
- Swiss Light Source, Paul Scherrer Institut, Villigen PSI, Switzerland
| | - Ann Amos
- University of Oxford, Structural Genomics Consortium, Oxford, United Kingdom
| | - Nicholas Pagano
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, Marburg, Germany
| | - Howard Bregman
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Judit É. Debreczeni
- University of Oxford, Structural Genomics Consortium, Oxford, United Kingdom
| | - Wen Hwa Lee
- University of Oxford, Structural Genomics Consortium, Oxford, United Kingdom
| | - Frank von Delft
- University of Oxford, Structural Genomics Consortium, Oxford, United Kingdom
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, Marburg, Germany
| | - Stefan Knapp
- University of Oxford, Structural Genomics Consortium, Oxford, United Kingdom
- * E-mail:
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25
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Grundler R, Brault L, Gasser C, Bullock AN, Dechow T, Woetzel S, Pogacic V, Villa A, Ehret S, Berridge G, Spoo A, Dierks C, Biondi A, Knapp S, Duyster J, Schwaller J. Dissection of PIM serine/threonine kinases in FLT3-ITD-induced leukemogenesis reveals PIM1 as regulator of CXCL12-CXCR4-mediated homing and migration. ACTA ACUST UNITED AC 2009; 206:1957-70. [PMID: 19687226 PMCID: PMC2737164 DOI: 10.1084/jem.20082074] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
FLT3-ITD–mediated leukemogenesis is associated with increased expression of oncogenic PIM serine/threonine kinases. To dissect their role in FLT3-ITD–mediated transformation, we performed bone marrow reconstitution assays. Unexpectedly, FLT3-ITD cells deficient for PIM1 failed to reconstitute lethally irradiated recipients, whereas lack of PIM2 induction did not interfere with FLT3-ITD–induced disease. PIM1-deficient bone marrow showed defects in homing and migration and displayed decreased surface CXCR4 expression and impaired CXCL12–CXCR4 signaling. Through small interfering RNA–mediated knockdown, chemical inhibition, expression of a dominant-negative mutant, and/or reexpression in knockout cells, we found PIM1 activity to be essential for proper CXCR4 surface expression and migration of cells toward a CXCL12 gradient. Purified PIM1 led to the phosphorylation of serine 339 in the CXCR4 intracellular domain in vitro, a site known to be essential for normal receptor recycling. In primary leukemic blasts, high levels of surface CXCR4 were associated with increased PIM1 expression, and this could be significantly reduced by a small molecule PIM inhibitor in some patients. Our data suggest that PIM1 activity is important for homing and migration of hematopoietic cells through modification of CXCR4. Because CXCR4 also regulates homing and maintenance of cancer stem cells, PIM1 inhibitors may exert their antitumor effects in part by interfering with interactions with the microenvironment.
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Affiliation(s)
- Rebekka Grundler
- Department of Internal Medicine III, Technical University, Munich 81739, Germany
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Protein synthesis is resistant to rapamycin and constitutes a promising therapeutic target in acute myeloid leukemia. Blood 2009; 114:1618-27. [PMID: 19458359 DOI: 10.1182/blood-2008-10-184515] [Citation(s) in RCA: 152] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The deregulation of translation markedly contributes to the malignant phenotype in cancers, and the assembly of the translation initiating complex eIF4F is the limiting step of this process. The mammalian Target of Rapamycin Complex 1 (mTORC1) is thought to positively regulate eIF4F assembly and subsequent oncogenic protein synthesis through 4E-BP1 phosphorylation. We showed here that the translation inhibitor 4EGI-1 decreased the clonogenic growth of leukemic progenitors and induced apoptosis of blast cells, with limited toxicity against normal hematopoiesis, which emphasize the importance of translation deregulation in acute myeloid leukemia (AML) biology. However, the mTORC1 inhibitor RAD001 (a rapamycin derivate) did not induce AML blast cell apoptosis. We herein demonstrated that mTORC1 disruption using raptor siRNA or RAD001 failed to inhibit 4E-BP1 phosphorylation in AML. Moreover, RAD001 failed to inhibit eIF4F assembly, to decrease the proportion of polysome-bound c-Myc mRNA, and to reduce the translation-dependent accumulation of oncogenic proteins. We identified the Pim-2 serine/threonine kinase as mainly responsible for 4E-BP1 phosphorylation on the S(65) residue and subsequent translation control in AML. Our results strongly implicate an mTORC1-independent deregulation of oncogenic proteins synthesis in human myeloid leukemogenesis. Direct inhibition of the translation initiating complex thus represents an attractive option for the development of new therapies in AML.
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Pizzimenti S, Ferracin M, Sabbioni S, Toaldo C, Pettazzoni P, Dianzani MU, Negrini M, Barrera G. MicroRNA expression changes during human leukemic HL-60 cell differentiation induced by 4-hydroxynonenal, a product of lipid peroxidation. Free Radic Biol Med 2009; 46:282-8. [PMID: 19022373 DOI: 10.1016/j.freeradbiomed.2008.10.035] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Revised: 10/08/2008] [Accepted: 10/08/2008] [Indexed: 01/22/2023]
Abstract
4-Hydroxynonenal (HNE) is one of several lipid oxidation products that may have an impact on human pathophysiology. It is an important second messenger involved in the regulation of various cellular processes and exhibits antiproliferative and differentiative properties in various tumor cell lines. The mechanisms by which HNE affects cell growth and differentiation are only partially clarified. Because microRNAs (miRNAs) have the ability to regulate several cellular processes, we hypothesized that HNE, in addition to other mechanisms, could affect miRNA expression. Here, we present the results of a genome-wide miRNA expression profiling of HNE-treated HL-60 leukemic cells. Among 470 human miRNAs, 10 were found to be differentially expressed between control and HNE-treated cells (at p<0.05). Six miRNAs were down-regulated (miR-181a*, miR-199b, miR-202, miR-378, miR-454-3p, miR-575) and 4 were up-regulated (miR-125a, miR-339, miR-663, miR-660). Three of these regulated miRNAs (miR-202, miR-339, miR-378) were further assayed and validated by quantitative real-time RT-PCR. Moreover, consistent with the down-regulation of miR-378, HNE also induced the expression of the SUFU protein, a tumor suppressor recently identified as a target of miR-378. The finding that HNE could regulate the expression of miRNAs and their targets opens new perspectives on the understanding of HNE-controlled pathways. A functional analysis of 191 putative gene targets of miRNAs modulated by HNE is discussed.
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Affiliation(s)
- Stefania Pizzimenti
- Dipartimento di Medicina e Oncologia Sperimentale, Sezione di Patologia Generale, Università di Torino, Corso Raffaello 30, 10125 Torino, Italy.
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