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Mitochondrial oxidative phosphorylation is dispensable for survival of CD34+ chronic myeloid leukemia stem and progenitor cells. Cell Death Dis 2022; 13:384. [PMID: 35444236 PMCID: PMC9021200 DOI: 10.1038/s41419-022-04842-5] [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: 08/16/2021] [Revised: 04/03/2022] [Accepted: 04/06/2022] [Indexed: 12/24/2022]
Abstract
AbstractChronic myeloid leukemia (CML) are initiated and sustained by self-renewing malignant CD34+ stem cells. Extensive efforts have been made to reveal the metabolic signature of the leukemia stem/progenitor cells in genomic, transcriptomic, and metabolomic studies. However, very little proteomic investigation has been conducted and the mechanism regarding at what level the metabolic program was rewired remains poorly understood. Here, using label-free quantitative proteomic profiling, we compared the signature of CD34+ stem/progenitor cells collected from CML individuals with that of healthy donors and observed significant changes in the abundance of enzymes associated with aerobic central carbonate metabolic pathways. Specifically, CML stem/progenitor cells expressed increased tricarboxylic acid cycle (TCA) with decreased glycolytic proteins, accompanying by increased oxidative phosphorylation (OXPHOS) and decreased glycolysis activity. Administration of the well-known OXPHOS inhibitor metformin eradicated CML stem/progenitor cells and re-sensitized CD34+ CML cells to imatinib in vitro and in patient-derived tumor xenograft murine model. However, different from normal CD34+ cells, the abundance and activity of OXPHOS protein were both unexpectedly elevated with endoplasmic reticulum stress induced by metformin in CML CD34+ cells. The four major aberrantly expressed protein sets, in contrast, were downregulated by metformin in CML CD34+ cells. These data challenged the dependency of OXPHOS for CML CD34+ cell survival and underlined the novel mechanism of metformin. More importantly, it suggested a strong rationale for the use of tyrosine kinase inhibitors in combination with metformin in treating CML.
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2
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Chung HY, Lin BA, Lin YX, Chang CW, Tzou WS, Pei TW, Hu CH. Meis1, Hi1α, and GATA1 are integrated into a hierarchical regulatory network to mediate primitive erythropoiesis. FASEB J 2021; 35:e21915. [PMID: 34496088 DOI: 10.1096/fj.202001044rrr] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 08/20/2021] [Accepted: 08/27/2021] [Indexed: 12/16/2022]
Abstract
During development, erythroid cells are generated by two waves of hematopoiesis. In zebrafish, primitive erythropoiesis takes place in the intermediate cell mass region, and definitive erythropoiesis arises from the aorta-gonad mesonephros. TALE-homeoproteins Meis1 and Pbx1 function upstream of GATA1 to specify the erythroid lineage. Embryos lacking Meis1 or Pbx1 have weak gata1 expression and fail to produce primitive erythrocytes. Nevertheless, the underlying mechanism of how Meis1 and Pbx1 mediate gata1 transcription in erythrocytes remains unclear. Here we show that Hif1α acts downstream of Meis1 to mediate gata1 expression in zebrafish embryos. Inhibition of Meis1 expression resulted in suppression of hif1a expression and abrogated primitive erythropoiesis, while injection with in vitro-synthesized hif1α mRNA rescued gata1 transcription in Meis1 morphants and recovered their erythropoiesis. Ablation of Hif1α expression either by morpholino knockdown or Crispr-Cas9 knockout suppressed gata1 transcription and abrogated primitive erythropoiesis. Results of chromatin immunoprecipitation assays showed that Hif1α associates with hypoxia-response elements located in the 3'-flanking region of gata1 during development, suggesting that Hif1α regulates gata1 expression in vivo. Together, our results indicate that Meis1, Hif1α, and GATA1 indeed comprise a hierarchical regulatory network in which Hif1α acts downstream of Meis1 to activate gata1 transcription through direct interactions with its cis-acting elements in primitive erythrocytes.
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Affiliation(s)
- Hsin-Yu Chung
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Bo-An Lin
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Yi-Xuan Lin
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Chen-Wei Chang
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Wen-Shyong Tzou
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan.,Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
| | - Tun-Wen Pei
- Department of Computer Science and Information Engineering, National Taipei University of Technology
| | - Chin-Hwa Hu
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan.,Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
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3
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Mao MJ, Leonardi DE. Vascular-endothelial response to IDH1 mutant fibrosarcoma secretome and metabolite: implications on cancer microenvironment. Am J Cancer Res 2019; 9:122-133. [PMID: 30755816 PMCID: PMC6356916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 11/28/2018] [Indexed: 06/09/2023] Open
Abstract
Isocitrate dehydrogenases (IDHs) are enzymes involved in the production of α-ketoglutarate (αkg) in normal cellular metabolism. Cells with IDH mutations reduce αkg to 2-hydroxyglutarate (2HG), an oncometabolite, and 2HG directly transforms normal cells to malignant cells through histone demethylation and epigenetic dysregulation. However, whether IDH mutations affect cancer stromal cells is elusive, and little is known whether 2HG may impact the tumor microenvironment. We hypothesized that the IDH mutant cancer secretome and metabolites would stimulate primitive vascular-endothelial genesis. The secretome of IDH1 mutant human fibrosarcoma cells was harvested following medium starvation and was used to treat vascular-endothelial cells using a tube formation assay. GSK864, an allosteric IDH1 inhibitor, was supplemented to the fibrosarcoma secretome to determine its effects on vascular-endothelial tube formation. Exogenous 2HG or as supplemented in the GSK864-treated secretome was applied to further induce vascular-endothelial perturbation. Total vascular-endothelial tube lengths were quantified using NIH/Image J. Two-sided Student's t-tests and Mann-Whitney U tests were used for statistical analysis. The IDH1 mutant fibrosarcoma secretome stimulated vascular-endothelial tube formation by ~138% relative to control. Remarkably, GSK864 attenuated vascular-endothelial tube formation by ~36%, but 2HG not only reversed GSK864 attenuation of tube formation, but also significantly stimulated vascular-endothelial tubes in the GSK864-treated fibrosarcoma secretome. Importantly, 2HG alone augmented vascular-endothelial tube formation that was equivalent to the fibrosarcoma secretome. Thus, 2HG stimulates vascular-endothelial genesis in conjunction with the fibrosarcoma secretome, despite pre-emptive inhibition of IDH1 mutation with GSK864, suggesting that 2HG enables oncogenic angiogenesis via paracrine signaling. Stimulation of vascular-endothelial genesis by 2HG alone, independent of the cancer secretome, suggests that 2HG also activates oncogenic angiogenic pathways in cancer stromal cells. Thus, the IDH mutant cancer secretome stimulates primitive oncogenic angiogenesis through 2HG and/or paracrine pathways. Taken together, these findings suggest novel mechanisms by which the IDH mutant cancer secretome and/or metabolite, specifically 2HG, interacts with the tumor microenvironment by inducing oncogenic angiogenesis in favor of metastasis.
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Affiliation(s)
- Maiya J Mao
- Laboratory of Cell Biology, Bergen County Academies 200 Hackensack Ave, Hackensack, NJ 07601, USA
| | - Donna E Leonardi
- Laboratory of Cell Biology, Bergen County Academies 200 Hackensack Ave, Hackensack, NJ 07601, USA
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4
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Karantanou C, Godavarthy PS, Krause DS. Targeting the bone marrow microenvironment in acute leukemia. Leuk Lymphoma 2018; 59:2535-2545. [PMID: 29431560 DOI: 10.1080/10428194.2018.1434886] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Despite individual differences between certain leukemias, the overall survival rate in acute leukemia remains low at approximately 40%. Novel therapeutics, including targeted therapies like tyrosine kinase inhibitors, have been incorporated into treatment regimens, but most have failed at eradicating leukemic stem cells (LSCs). The causes of disease relapse, progression, and resistance to chemotherapy are as yet not entirely clear but thought to be linked to protection in the bone marrow microenvironment (BMM). In this review, we summarize current knowledge on the BMM in acute leukemias and examine the ongoing efforts to target the BMM, which include treatment strategies targeting (a) leukemia-BMM interactions, (b) leukemia-cell intrinsic pathways influenced by the BMM, and (c) direct BMM targeting strategies. It is likely that the future ploy against leukemia will involve these and other innovative strategies designed to eradicate the last remaining warrior - the LSC.
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Affiliation(s)
- Christina Karantanou
- a Institute for Tumor Biology and Experimental Therapy , Georg-Speyer-Haus , Frankfurt am Main , Germany
| | - Parimala Sonika Godavarthy
- a Institute for Tumor Biology and Experimental Therapy , Georg-Speyer-Haus , Frankfurt am Main , Germany
| | - Daniela S Krause
- a Institute for Tumor Biology and Experimental Therapy , Georg-Speyer-Haus , Frankfurt am Main , Germany
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5
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Zhou HS, Carter BZ, Andreeff M. Bone marrow niche-mediated survival of leukemia stem cells in acute myeloid leukemia: Yin and Yang. Cancer Biol Med 2016; 13:248-59. [PMID: 27458532 PMCID: PMC4944541 DOI: 10.20892/j.issn.2095-3941.2016.0023] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Acute myeloid leukemia (AML) is characterized by the accumulation of circulating immature blasts that exhibit uncontrolled growth, lack the ability to undergo normal differentiation, and have decreased sensitivity to apoptosis. Accumulating evidence shows the bone marrow (BM) niche is critical to the maintenance and retention of hematopoietic stem cells (HSC), including leukemia stem cells (LSC), and an increasing number of studies have demonstrated that crosstalk between LSC and the stromal cells associated with this niche greatly influences leukemia initiation, progression, and response to therapy. Undeniably, stromal cells in the BM niche provide a sanctuary in which LSC can acquire a drug-resistant phenotype and thereby evade chemotherapy-induced death. Yin and Yang, the ancient Chinese philosophical concept, vividly portrays the intricate and dynamic interactions between LSC and the BM niche. In fact, LSC-induced microenvironmental reprogramming contributes significantly to leukemogenesis. Thus, identifying the critical signaling pathways involved in these interactions will contribute to target optimization and combinatorial drug treatment strategies to overcome acquired drug resistance and prevent relapse following therapy. In this review, we describe some of the critical signaling pathways mediating BM niche-LSC interaction, including SDF1/CXCL12, Wnt/β-catenin, VCAM/VLA-4/NF-κB, CD44, and hypoxia as a newly-recognized physical determinant of resistance, and outline therapeutic strategies for overcoming these resistance factors.
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Affiliation(s)
- Hong-Sheng Zhou
- Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA; Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Bing Z Carter
- Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Michael Andreeff
- Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
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Bosse RC, Wasserstrom B, Meacham A, Wise E, Drusbosky L, Walter GA, Chaplin DJ, Siemann DW, Purich DL, Cogle CR. Chemosensitizing AML cells by targeting bone marrow endothelial cells. Exp Hematol 2016; 44:363-377.e5. [PMID: 26898708 DOI: 10.1016/j.exphem.2016.02.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 01/11/2016] [Accepted: 02/06/2016] [Indexed: 01/19/2023]
Abstract
Refractory disease is the greatest challenge in treating patients with acute myeloid leukemia (AML). Blood vessels may serve as sanctuary sites for AML. When AML cells were co-cultured with bone marrow endothelial cells (BMECs), a greater proportion of leukemia cells were in G0/G1. This led us to a strategy of targeting BMECs with tubulin-binding combretastatins, causing BMECs to lose their flat phenotype, degrade their cytoskeleton, cease growth, and impair migration despite unchanged BMEC viability and metabolism. Combretastatins also caused downregulation of BMEC adhesion molecules known to tether AML cells, including vascular cell adhesion molecule (VCAM)-1 and vascular endothelial (VE)-cadherin. When AML-BMEC co-cultures were treated with combretastatins, a significantly greater proportion of AML cells dislodged from BMECs and entered the G2/M cell cycle, suggesting enhanced susceptibility to cell cycle agents. Indeed, the combination of combretastatins and cytotoxic chemotherapy enhanced additive AML cell death. In vivo mice xenograft studies confirmed this finding by revealing complete AML regression after treatment with combretastatins and cytotoxic chemotherapy. Beyond highlighting the pathologic role of BMECs in the leukemia microenvironment as a protective reservoir of disease, these results support a new strategy for using vascular-targeting combretastatins in combination with cytotoxic chemotherapy to treat AML.
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Affiliation(s)
- Raphael C Bosse
- Division of Hematology and Oncology, Department of Medicine, College of Medicine, University of Florida, Gainesville, FL.
| | - Briana Wasserstrom
- Division of Hematology and Oncology, Department of Medicine, College of Medicine, University of Florida, Gainesville, FL
| | - Amy Meacham
- Division of Hematology and Oncology, Department of Medicine, College of Medicine, University of Florida, Gainesville, FL
| | - Elizabeth Wise
- Division of Hematology and Oncology, Department of Medicine, College of Medicine, University of Florida, Gainesville, FL
| | - Leylah Drusbosky
- Division of Hematology and Oncology, Department of Medicine, College of Medicine, University of Florida, Gainesville, FL
| | - Glenn A Walter
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville, FL
| | | | - Dietmar W Siemann
- Department of Radiation Oncology, College of Medicine, University of Florida, Gainesville, FL
| | - Daniel L Purich
- Department of Biochemistry and Molecular Biology, College of Medicine, University of Florida, Gainesville, FL
| | - Christopher R Cogle
- Division of Hematology and Oncology, Department of Medicine, College of Medicine, University of Florida, Gainesville, FL
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7
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Targeted Therapies in Adult B-Cell Malignancies. BIOMED RESEARCH INTERNATIONAL 2015; 2015:217593. [PMID: 26425544 PMCID: PMC4575712 DOI: 10.1155/2015/217593] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 05/03/2015] [Accepted: 05/05/2015] [Indexed: 12/17/2022]
Abstract
B-lymphocytes are programmed for the production of immunoglobulin (Ig) after antigen presentation, in the context of T-lymphocyte control within lymphoid organs. During this differentiation/activation process, B-lymphocytes exhibit different restricted or common surface markers, activation of cellular pathways that regulate cell cycle, metabolism, proteasome activity, and protein synthesis. All molecules involved in these different cellular mechanisms are potent therapeutic targets. Nowadays, due to the progress of the biology, more and more targeted drugs are identified, a situation that is correlated with an extended field of the targeted therapy. The full knowledge of the cellular machinery and cell-cell communication allows making the best choice to treat patients, in the context of personalized medicine. Also, focus should not be restricted to the immediate effects observed as clinical endpoints, that is, response rate, survival markers with conventional statistical methods, but it should consider the prediction of different clinical consequences due to other collateral drug targets, based on new methodologies. This means that new reflection and new bioclinical follow-up have to be monitored, particularly with the new drugs used with success in B-cell malignancies. This review discussed the principal aspects of such evident bioclinical progress.
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Xia B, Tian C, Guo S, Zhang L, Zhao D, Qu F, Zhao W, Wang Y, Wu X, Da W, Wei S, Zhang Y. c-Myc plays part in drug resistance mediated by bone marrow stromal cells in acute myeloid leukemia. Leuk Res 2014; 39:92-9. [PMID: 25443862 DOI: 10.1016/j.leukres.2014.11.004] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 10/26/2014] [Accepted: 11/09/2014] [Indexed: 12/18/2022]
Abstract
Acute myeloid leukemia (AML) is a malignant and aggressive disease not sensitive to chemotherapy. The dynamic interaction between AML cells and bone marrow (BM) microenvironment plays a critical role in response of this disease to chemotherapy. It is reported that mesenchymal stromal cells (MSC) are essential component of bone marrow microenvironment which affects the survival of AML cells. The aim of our research is to elucidate the mechanism of drug resistance of AML cells associated with MSC. We found that adhesion of AML cell lines U937, KG1a and primary AML cells to MSC inhibited cytotoxic drug-induced apoptosis. Western blot showed that c-Myc of AML cells cocultured with stroma was up-regulated. Treatment with 10058-F4, a small molecule inhibitor of MYC-MAX heterodimerization, or c-Myc siRNA significantly induced apoptosis. Western blot analysis further showed that inhibition of c-Myc induced expression of caspases-3, cleavage of PARP and reduced expression of Bcl-2, Bcl-xL and vascular endothelial growth factor (VEGF). Thus, we conclude that MSCs protected leukemia cells from apoptosis, at least in part, through c-Myc dependent mechanisms, and that c-Myc contributed to microenvironment-mediated drug resistance in AML. In summary, we declared that c-Myc is a potential therapeutic target for overcoming drug resistance in AML.
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Affiliation(s)
- Bing Xia
- Department of Hematology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Chen Tian
- Department of Hematology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Shanqi Guo
- Department of Hematology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Le Zhang
- Department of Hematology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Dandan Zhao
- Department of Hematology, First Affiliated Hospital of Chinese People's Liberation Army General Hospital, Beijing, China
| | - Fulian Qu
- Department of Hematology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Weipeng Zhao
- Department of Hematology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Yafei Wang
- Department of Hematology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
| | - Xiaoxiong Wu
- Department of Hematology, First Affiliated Hospital of Chinese People's Liberation Army General Hospital, Beijing, China
| | - Wanming Da
- Department of Hematology, Chinese People's Liberation Army General Hospital, Beijing, China
| | - Sheng Wei
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, USA
| | - Yizhuo Zhang
- Department of Hematology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer, Key laboratory of Cancer Prevention and Therapy, Tianjin 300060, China.
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9
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Villalba M, Lopez-Royuela N, Krzywinska E, Rathore MG, Hipskind RA, Haouas H, Allende-Vega N. Chemical metabolic inhibitors for the treatment of blood-borne cancers. Anticancer Agents Med Chem 2014; 14:223-32. [PMID: 24237221 DOI: 10.2174/18715206113136660374] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 03/20/2013] [Accepted: 10/07/2013] [Indexed: 12/16/2022]
Abstract
Tumor cells, including leukemic cells, remodel their bioenergetic system in favor of aerobic glycolysis. This process is called "the Warburg effect" and offers an attractive pharmacological target to preferentially eliminate malignant cells. In addition, recent results show that metabolic changes can be linked to tumor immune evasion. Mouse models demonstrate the importance of this metabolic remodeling in leukemogenesis. Some leukemias, although treatable, remain incurable and resistance to chemotherapy produces an elevated percentage of relapse in most leukemia cases. Several groups have targeted the specific metabolism of leukemia cells in preclinical and clinical studies to improve the prognosis of these patients, i.e. using L-asparaginase to treat pediatric acute lymphocytic leukemia (ALL). Additional metabolic drugs that are currently being used to treat other diseases or tumors could also be exploited for leukemia, based on preclinical studies. Finally, we discuss the potential use of several metabolic drugs in combination therapies, including immunomodulatory drugs (IMiDs) or immune cell-based therapies, to increase their efficacy and reduce side effects in the treatment of hematological cancers.
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Affiliation(s)
| | | | | | | | | | | | - Nerea Allende-Vega
- INSERM U1040, Institut de Recherche en Biothérapie, 80, avenue Augustin Fliche. 34295 Montpellier Cedex 5, France.
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10
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Lopez-Royuela N, Rathore MG, Allende-Vega N, Annicotte JS, Fajas L, Ramachandran B, Gulick T, Villalba M. Extracellular-signal-regulated kinase 5 modulates the antioxidant response by transcriptionally controlling Sirtuin 1 expression in leukemic cells. Int J Biochem Cell Biol 2014; 53:253-61. [DOI: 10.1016/j.biocel.2014.05.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 04/17/2014] [Accepted: 05/19/2014] [Indexed: 01/15/2023]
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11
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Civini S, Jin P, Ren J, Sabatino M, Castiello L, Jin J, Wang H, Zhao Y, Marincola F, Stroncek D. Leukemia cells induce changes in human bone marrow stromal cells. J Transl Med 2013; 11:298. [PMID: 24304929 PMCID: PMC3882878 DOI: 10.1186/1479-5876-11-298] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 11/27/2013] [Indexed: 12/24/2022] Open
Abstract
Background Bone marrow stromal cells (BMSCs) are multipotent cells that support angiogenesis, wound healing, and immunomodulation. In the hematopoietic niche, they nurture hematopoietic cells, leukemia, tumors and metastasis. BMSCs secrete of a wide range of cytokines, growth factors and matrix proteins which contribute to the pro-tumorigenic marrow microenvironment. The inflammatory cytokines IFN-γ and TNF-α change the BMSC secretome and we hypothesized that factors produced by tumors or leukemia would also affect the BMSC secretome and investigated the interaction of leukemia cells with BMSCs. Methods BMSCs from healthy subjects were co-cultured with three myeloid leukemia cell lines (TF-1, TF-1α and K562) using a trans-well system. Following co-culture, the BMSCs and leukemia cells were analyzed by global gene expression analysis and culture supernatants were analyzed for protein expression. As a control, CD34+ cells were also cocultured with BMSCs. Results Co-culture induced leukemia cell gene expression changes in stem cell pluripotency, TGF-β signaling and carcinoma signaling pathways. BMSCs co-cultured with leukemia cells up-regulated a number of proinflammatory genes including IL-17 signaling-related genes and IL-8 and CCL2 levels were increased in co-culture supernatants. In contrast, purine metabolism, mTOR signaling and EIF2 signaling pathways genes were up-regulated in BMSCs co-cultured with CD34+ cells. Conclusions BMSCs react to the presence of leukemia cells undergoing changes in the cytokine and chemokine secretion profiles. Thus, BMSCs and leukemia cells both contribute to the creation of a competitive niche more favorable for leukemia stem cells.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - David Stroncek
- Cell Processing Section, Department of Transfusion Medicine, Clinical Center, National Institutes of Health (NIH), Building 10, Room 3C720, 9000 Rockville Pike, Bethesda, MD 20892-1184, USA.
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12
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Bucur O, Stancu AL, Goganau I, Petrescu SM, Pennarun B, Bertomeu T, Dewar R, Khosravi-Far R. Combination of bortezomib and mitotic inhibitors down-modulate Bcr-Abl and efficiently eliminates tyrosine-kinase inhibitor sensitive and resistant Bcr-Abl-positive leukemic cells. PLoS One 2013; 8:e77390. [PMID: 24155950 PMCID: PMC3796452 DOI: 10.1371/journal.pone.0077390] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 09/06/2013] [Indexed: 12/17/2022] Open
Abstract
Emergence of resistance to Tyrosine-Kinase Inhibitors (TKIs), such as imatinib, dasatinib and nilotinib, in Chronic Myelogenous Leukemia (CML) demands new therapeutic strategies. We and others have previously established bortezomib, a selective proteasome inhibitor, as an important potential treatment in CML. Here we show that the combined regimens of bortezomib with mitotic inhibitors, such as the microtubule-stabilizing agent Paclitaxel and the PLK1 inhibitor BI2536, efficiently kill TKIs-resistant and -sensitive Bcr-Abl-positive leukemic cells. Combined treatment activates caspases 8, 9 and 3, which correlate with caspase-induced PARP cleavage. These effects are associated with a marked increase in activation of the stress-related MAP kinases p38MAPK and JNK. Interestingly, combined treatment induces a marked decrease in the total and phosphorylated Bcr-Abl protein levels, and inhibits signaling pathways downstream of Bcr-Abl: downregulation of STAT3 and STAT5 phosphorylation and/or total levels and a decrease in phosphorylation of the Bcr-Abl-associated proteins CrkL and Lyn. Moreover, we found that other mitotic inhibitors (Vincristine and Docetaxel), in combination with bortezomib, also suppress the Bcr-Abl-induced pro-survival signals and result in caspase 3 activation. These results open novel possibilities for the treatment of Bcr-Abl-positive leukemias, especially in the imatinib, dasatinib and nilotinib-resistant CML cases.
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Affiliation(s)
- Octavian Bucur
- Department of Pathology, Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
- Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Andreea Lucia Stancu
- Department of Pathology, Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Ioana Goganau
- Department of Pathology, Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | | | - Bodvael Pennarun
- Department of Pathology, Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Thierry Bertomeu
- Department of Pathology, Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Rajan Dewar
- Department of Pathology, Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Roya Khosravi-Far
- Department of Pathology, Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
- Biological and Biomedical Sciences Program, Harvard Medical School, Boston, Massachusetts, United States of America;
- * E-mail:
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