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Wang Y, Tsukamoto Y, Hori M, Iha H. Disulfidptosis: A Novel Prognostic Criterion and Potential Treatment Strategy for Diffuse Large B-Cell Lymphoma (DLBCL). Int J Mol Sci 2024; 25:7156. [PMID: 39000261 PMCID: PMC11241771 DOI: 10.3390/ijms25137156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/24/2024] [Accepted: 06/24/2024] [Indexed: 07/16/2024] Open
Abstract
Diffuse Large B-cell Lymphoma (DLBCL), with its intrinsic genetic and epigenetic heterogeneity, exhibits significantly variable clinical outcomes among patients treated with the current standard regimen. Disulfidptosis, a novel form of regulatory cell death triggered by disulfide stress, is characterized by the collapse of cytoskeleton proteins and F-actin due to intracellular accumulation of disulfides. We investigated the expression variations of disulfidptosis-related genes (DRGs) in DLBCL using two publicly available gene expression datasets. The initial analysis of DRGs in DLBCL (GSE12453) revealed differences in gene expression patterns between various normal B cells and DLBCL. Subsequent analysis (GSE31312) identified DRGs strongly associated with prognostic outcomes, revealing eight characteristic DRGs (CAPZB, DSTN, GYS1, IQGAP1, MYH9, NDUFA11, NDUFS1, OXSM). Based on these DRGs, DLBCL patients were stratified into three groups, indicating that (1) DRGs can predict prognosis, and (2) DRGs can help identify novel therapeutic candidates. This study underscores the significant role of DRGs in various biological processes within DLBCL. Assessing the risk scores of individual DRGs allows for more precise stratification of prognosis and treatment strategies for DLBCL patients, thereby enhancing the effectiveness of clinical practice.
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Affiliation(s)
- Yu Wang
- Department of Microbiology, Faculty of Medicine, Oita University, Yufu 879-5593, Japan;
| | - Yoshiyuki Tsukamoto
- Department of Molecular Pathology, Faculty of Medicine, Oita University, Yufu 879-5593, Japan;
| | - Mitsuo Hori
- Department of Hematology, Ibaraki Prefectural Central Hospital, Kasama 309-1703, Japan;
| | - Hidekatsu Iha
- Department of Microbiology, Faculty of Medicine, Oita University, Yufu 879-5593, Japan;
- Division of Pathophysiology, The Research Center for GLOBAL and LOCAL Infectious Diseases (RCGLID), Oita University, Yufu 879-5503, Japan
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2
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DA Costa Machado AK, Machado CB, DE Pinho Pessoa FMC, Barreto IV, Gadelha RB, DE Sousa Oliveira D, Ribeiro RM, Lopes GS, DE Moraesfilho MO, DE Moraes MEA, Khayat AS, Moreira-Nunes CA. Development and Clinical Applications of PI3K/AKT/mTOR Pathway Inhibitors as a Therapeutic Option for Leukemias. CANCER DIAGNOSIS & PROGNOSIS 2024; 4:9-24. [PMID: 38173664 PMCID: PMC10758851 DOI: 10.21873/cdp.10279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 11/15/2023] [Indexed: 01/05/2024]
Abstract
Leukemias are hematological neoplasms characterized by dysregulations in several cellular signaling pathways, prominently including the PI3K/AKT/mTOR pathway. Since this pathway is associated with several important cellular mechanisms, such as proliferation, metabolism, survival, and cell death, its hyperactivation significantly contributes to the development of leukemias. In addition, it is a crucial prognostic factor, often correlated with therapeutic resistance. Changes in the PI3K/AKT/mTOR pathway are identified in more than 50% of cases of acute leukemia, especially in myeloid lineages. Furthermore, these changes are highly frequent in cases of chronic lymphocytic leukemia, especially those with a B cell phenotype, due to the correlation between the hyperactivation of B cell receptors and the abnormal activation of PI3Kδ. Thus, the search for new therapies that inhibit the activity of the PI3K/AKT/mTOR pathway has become the objective of several clinical studies that aim to replace conventional oncological treatments that have high rates of toxicities and low specificity with target-specific therapies offering improved patient quality of life. In this review we describe the PI3K/AKT/mTOR signal transduction pathway and its implications in leukemogenesis. Furthermore, we provide an overview of clinical trials that employed PI3K/AKT/mTOR inhibitors either as monotherapy or in combination with other cytotoxic agents for treating patients with various types of leukemias. The varying degrees of treatment efficacy are also reported.
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Affiliation(s)
- Anna Karolyna DA Costa Machado
- Department of Medicine, Pharmacogenetics Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, CE, Brazil
| | - Caio Bezerra Machado
- Department of Medicine, Pharmacogenetics Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, CE, Brazil
| | - Flávia Melo Cunha DE Pinho Pessoa
- Department of Medicine, Pharmacogenetics Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, CE, Brazil
| | - Igor Valentim Barreto
- Department of Medicine, Pharmacogenetics Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, CE, Brazil
| | - Renan Brito Gadelha
- Department of Medicine, Pharmacogenetics Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, CE, Brazil
| | | | | | | | - Manoel Odorico DE Moraesfilho
- Department of Medicine, Pharmacogenetics Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, CE, Brazil
| | - Maria Elisabete Amaral DE Moraes
- Department of Medicine, Pharmacogenetics Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, CE, Brazil
| | - André Salim Khayat
- Department of Biological Sciences, Oncology Research Center, Federal University of Pará, Belém, PA, Brazil
| | - Caroline Aquino Moreira-Nunes
- Department of Medicine, Pharmacogenetics Laboratory, Drug Research and Development Center (NPDM), Federal University of Ceará, Fortaleza, CE, Brazil
- Department of Biological Sciences, Oncology Research Center, Federal University of Pará, Belém, PA, Brazil
- Clementino Fraga Group, Central Unity, Molecular Biology Laboratory, Fortaleza, CE, Brazil
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3
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Fernández-Garnacho EM, Nadeu F, Martín S, Mozas P, Rivero A, Delgado J, Giné E, López-Guillermo A, Duran-Ferrer M, Salaverria I, López C, Beà S, Demajo S, Jares P, Puente XS, Martín-Subero JI, Campo E, Hernández L. MALAT1 expression is associated with aggressive behavior in indolent B-cell neoplasms. Sci Rep 2023; 13:16839. [PMID: 37803049 PMCID: PMC10558466 DOI: 10.1038/s41598-023-44174-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 10/04/2023] [Indexed: 10/08/2023] Open
Abstract
MALAT1 long non-coding RNA has oncogenic roles but has been poorly studied in indolent B-cell neoplasms. Here, MALAT1 expression was analyzed using RNA-seq, microarrays or qRT-PCR in primary samples from clinico-biological subtypes of chronic lymphocytic leukemia (CLL, n = 266), paired Richter transformation (RT, n = 6) and follicular lymphoma (FL, n = 61). In peripheral blood (PB) CLL samples, high MALAT1 expression was associated with a significantly shorter time to treatment independently from other known prognostic factors. Coding genes expressed in association with MALAT1 in CLL were predominantly related to oncogenic pathways stimulated in the lymph node (LN) microenvironment. In RT paired samples, MALAT1 levels were lower, concordant with their acquired increased independency of external signals. Moreover, MALAT1 levels in paired PB/LN CLLs were similar, suggesting that the prognostic value of MALAT1 expression in PB is mirroring expression differences already present in LN. Similarly, high MALAT1 expression in FL predicted for a shorter progression-free survival, in association with expression pathways promoting FL pathogenesis. In summary, MALAT1 expression is related to pathophysiology and more aggressive clinical behavior of indolent B-cell neoplasms. Particularly in CLL, its levels could be a surrogate marker of the microenvironment stimulation and may contribute to refine the clinical management of these patients.
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Affiliation(s)
- Elena María Fernández-Garnacho
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
| | - Ferran Nadeu
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Silvia Martín
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
| | - Pablo Mozas
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Hospital Clínic of Barcelona, Universitat de Barcelona, Barcelona, Spain
| | - Andrea Rivero
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Hospital Clínic of Barcelona, Universitat de Barcelona, Barcelona, Spain
| | - Julio Delgado
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
- Hospital Clínic of Barcelona, Universitat de Barcelona, Barcelona, Spain
| | - Eva Giné
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
- Hospital Clínic of Barcelona, Universitat de Barcelona, Barcelona, Spain
| | - Armando López-Guillermo
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
- Hospital Clínic of Barcelona, Universitat de Barcelona, Barcelona, Spain
| | - Martí Duran-Ferrer
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
| | - Itziar Salaverria
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Cristina López
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Sílvia Beà
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
- Hospital Clínic of Barcelona, Universitat de Barcelona, Barcelona, Spain
| | - Santiago Demajo
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
| | - Pedro Jares
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
- Hospital Clínic of Barcelona, Universitat de Barcelona, Barcelona, Spain
| | - Xose S Puente
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
- University of Oviedo, Oviedo, Spain
| | - José Ignacio Martín-Subero
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Elías Campo
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
- Hospital Clínic of Barcelona, Universitat de Barcelona, Barcelona, Spain
| | - Lluís Hernández
- Lymphoid Neoplasm Program, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Centre Esther Koplowitz (CEK), Rosselló 153, 08036, Barcelona, Spain.
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain.
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4
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Derwich A, Sykutera M, Bromińska B, Rubiś B, Ruchała M, Sawicka-Gutaj N. The Role of Activation of PI3K/AKT/mTOR and RAF/MEK/ERK Pathways in Aggressive Pituitary Adenomas-New Potential Therapeutic Approach-A Systematic Review. Int J Mol Sci 2023; 24:10952. [PMID: 37446128 PMCID: PMC10341524 DOI: 10.3390/ijms241310952] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/18/2023] [Accepted: 06/23/2023] [Indexed: 07/15/2023] Open
Abstract
Pituitary tumors (PT) are mostly benign, although occasionally they demonstrate aggressive behavior, invasion of surrounding tissues, rapid growth, resistance to conventional treatments, and multiple recurrences. The pathogenesis of PT is still not fully understood, and the factors responsible for its invasiveness, aggressiveness, and potential for metastasis are unknown. RAF/MEK/ERK and mTOR signaling are significant pathways in the regulation of cell growth, proliferation, and survival, its importance in tumorigenesis has been highlighted. The aim of our review is to determine the role of the activation of PI3K/AKT/mTOR and RAF/MEK/ERK pathways in the pathogenesis of pituitary tumors. Additionally, we evaluate their potential in a new therapeutic approach to provide alternative therapies and improved outcomes for patients with aggressive pituitary tumors that do not respond to standard treatment. We perform a systematic literature search using the PubMed, Embase, and Scopus databases (search date was 2012-2023). Out of the 529 screened studies, 13 met the inclusion criteria, 7 related to the PI3K/AKT/mTOR pathway, and 7 to the RAF/MEK/ERK pathway (one study was used in both analyses). Understanding the specific factors involved in PT tumorigenesis provides opportunities for targeted therapies. We also review the possible new targeted therapies and the use of mTOR inhibitors and TKI in PT management. Although the RAF/MEK/ERK and PI3K/AKT/mTOR pathways play a pivotal role in the complex signaling network along with many interactions, further research is urgently needed to clarify the exact functions and the underlying mechanisms of these signaling pathways in the pathogenesis of pituitary adenomas and their role in its invasiveness and aggressive clinical outcome.
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Affiliation(s)
- Aleksandra Derwich
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, 60-355 Poznan, Poland; (A.D.)
- Doctoral School, Poznan University of Medical Sciences, 60-812 Poznan, Poland
| | - Monika Sykutera
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, 60-355 Poznan, Poland; (A.D.)
| | - Barbara Bromińska
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, 60-355 Poznan, Poland; (A.D.)
| | - Błażej Rubiś
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 60-355 Poznan, Poland
| | - Marek Ruchała
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, 60-355 Poznan, Poland; (A.D.)
| | - Nadia Sawicka-Gutaj
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, 60-355 Poznan, Poland; (A.D.)
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5
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Jambrovics K, Botó P, Pap A, Sarang Z, Kolostyák Z, Czimmerer Z, Szatmari I, Fésüs L, Uray IP, Balajthy Z. Transglutaminase 2 associated with PI3K and PTEN in a membrane-bound signalosome platform blunts cell death. Cell Death Dis 2023; 14:217. [PMID: 36977701 PMCID: PMC10050012 DOI: 10.1038/s41419-023-05748-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 03/10/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023]
Abstract
Atypically expressed transglutaminase 2 (TG2) has been identified as a poor prognostic factor in a variety of cancers. In this study, we evaluated the contribution of TG2 to the prolonged cell survival of differentiated acute promyelocytic leukaemia (APL) cells in response to the standard treatment with combined retinoic acid (ATRA) and arsenic trioxide (ATO). We report that one advantage of ATRA + ATO treatment compared to ATRA alone diminishes the amount of activated and non-activated CD11b/CD18 and CD11c/CD18 cell surface integrin receptors. These changes suppress ATRA-induced TG2 docking on the cytosolic part of CD18 β2-integrin subunits and reduce cell survival. In addition, TG2 overexpresses and hyperactivates the phosphatidylinositol-3-kinase (PI3K), phospho-AKT S473, and phospho-mTOR S2481 signalling axis. mTORC2 acts as a functional switch between cell survival and death by promoting the full activation of AKT. We show that TG2 presumably triggers the formation of a signalosome platform, hyperactivates downstream mTORC2-AKT signalling, which in turn phosphorylates and inhibits the activity of FOXO3, a key pro-apoptotic transcription factor. In contrast, the absence of TG2 restores basic phospho-mTOR S2481, phospho-AKT S473, PI3K, and PTEN expression and activity, thereby sensitising APL cells to ATO-induced cell death. We conclude, that atypically expressed TG2 may serve as a hub, facilitating signal transduction via signalosome formation by the CD18 subunit with both PI3K hyperactivation and PTEN inactivation through the PI3K-PTEN cycle in ATRA-treated APL cells.
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Affiliation(s)
- Károly Jambrovics
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
| | - Pál Botó
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
| | - Attila Pap
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
| | - Zsolt Sarang
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
| | - Zsuzsanna Kolostyák
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
| | - Zsolt Czimmerer
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
- Eötvös Loránd Research Network, Biological Research Centre, Institute of Genetics, Szeged, Hungary
| | - Istvan Szatmari
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
| | - László Fésüs
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
| | - Iván P Uray
- Department of Clinical Oncology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
| | - Zoltán Balajthy
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary.
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6
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Clinical Implications of mTOR Expression in Papillary Thyroid Cancer—A Systematic Review. Cancers (Basel) 2023; 15:cancers15061665. [PMID: 36980552 PMCID: PMC10046096 DOI: 10.3390/cancers15061665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/01/2023] [Accepted: 03/06/2023] [Indexed: 03/11/2023] Open
Abstract
Papillary thyroid cancer (PTC) comprises approximately 80% of all thyroid malignancies. Although several etiological factors, such as age, gender, and irradiation, are already known to be involved in the development of PTC, the genetics of cancerogenesis remain undetermined. The mTOR pathway regulates several cellular processes that are critical for tumorigenesis. Activated mTOR is involved in the development and progression of PTC. Therefore, we performed a systematic review of papers studying the expression of the mTOR gene and protein and its relationship with PTC risk and clinical outcome. A systematic literature search was performed using PubMed, Embase, and Scopus databases (the search date was 2012–2022). Studies investigating the expression of mTOR in the peripheral blood or tissue of patients with PTC were deemed eligible for inclusion. Seven of the 286 screened studies met the inclusion criteria for mTOR gene expression and four for mTOR protein expression. We also analyzed the data on mTOR protein expression in PTC. We analyzed the association of mTOR expression with papillary thyroid cancer clinicopathological features, such as the TNM stage, BRAF V600E mutation, sex distribution, lymph node and distant metastases, and survival prognosis. Understanding specific factors involved in PTC tumorigenesis provides opportunities for targeted therapies. We also reviewed the possible new targeted therapies and the use of mTOR inhibitors in PTC. This topic requires further research with novel techniques to translate the achieved results to clinical application.
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7
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Phillips NJ, Vinaithirthan BM, Oses-Prieto JA, Chalkley RJ, Burlingame AL. Capture, Release, and Identification of Newly Synthesized Proteins for Improved Profiling of Functional Translatomes. Mol Cell Proteomics 2023; 22:100497. [PMID: 36642223 PMCID: PMC9971285 DOI: 10.1016/j.mcpro.2023.100497] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 12/17/2022] [Accepted: 01/09/2023] [Indexed: 01/15/2023] Open
Abstract
New protein synthesis is regulated both at the level of mRNA transcription and translation. RNA-Seq is effective at measuring levels of mRNA expression, but techniques to monitor mRNA translation are much more limited. Previously, we reported results from O-propargyl-puromycin (OPP) labeling of proteins undergoing active translation in a 2-h time frame, followed by biotinylation using click chemistry, affinity purification, and on-bead digestion to identify nascent proteins by mass spectrometry (OPP-ID). As with any on-bead digestion protocol, the problem of nonspecific binders complicated the rigorous categorization of nascent proteins by OPP-ID. Here, we incorporate a chemically cleavable linker, Dde biotin-azide, into the protocol (OPP-IDCL) to provide specific release of modified proteins from the streptavidin beads. Following capture, the Dde moiety is readily cleaved with 2% hydrazine, releasing nascent polypeptides bearing OPP plus a residual C3H8N4 tag. When results are compared side by side with the original OPP-ID method, change to a cleavable linker led to a dramatic reduction in the number of background proteins detected in controls and a concomitant increase in the number of proteins that could be characterized as newly synthesized. We evaluated the method's ability to detect nascent proteins at various submilligram protein input levels and showed that, when starting with only 100 μg of protein, ∼1500 nascent proteins could be identified with low background. Upon treatment of K562 cells with MLN128, a potent inhibitor of the mammalian target of rapamycin, prior to OPP treatment, we identified 1915 nascent proteins, the majority of which were downregulated upon inhibitor treatment. Repressed proteins with log2 FC <-1 revealed a complex network of functionally interacting proteins, with the largest cluster associated with translational initiation. Overall, incorporation of the Dde biotin-azide cleavable linker into our protocol has increased the depth and accuracy of profiling of nascent protein networks.
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Affiliation(s)
- Nancy J Phillips
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California, USA
| | - Bala M Vinaithirthan
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California, USA
| | - Juan A Oses-Prieto
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California, USA
| | - Robert J Chalkley
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California, USA
| | - Alma L Burlingame
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California, USA; Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California, USA.
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8
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Panuzzo C, Pironi L, Maglione A, Rocco S, Stanga S, Riganti C, Kopecka J, Ali MS, Pergolizzi B, Bracco E, Cilloni D. mTORC2 Is Activated under Hypoxia and Could Support Chronic Myeloid Leukemia Stem Cells. Int J Mol Sci 2023; 24:ijms24021234. [PMID: 36674750 PMCID: PMC9865638 DOI: 10.3390/ijms24021234] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 01/03/2023] [Accepted: 01/03/2023] [Indexed: 01/11/2023] Open
Abstract
Hypoxia is a critical condition that governs survival, self-renewal, quiescence, metabolic shift and refractoriness to leukemic stem cell (LSC) therapy. The present study aims to investigate the hypoxia-driven regulation of the mammalian Target of the Rapamycin-2 (mTORC2) complex to unravel it as a novel potential target in chronic myeloid leukemia (CML) therapeutic strategies. After inducing hypoxia in a CML cell line model, we investigated the activities of mTORC1 and mTORC2. Surprisingly, we detected a significant activation of mTORC2 at the expense of mTORC1, accompanied by the nuclear localization of the main substrate phospho-Akt (Ser473). Moreover, the Gene Ontology analysis of CML patients' CD34+ cells showed enrichment in the mTORC2 signature, further strengthening our data. The deregulation of mTOR complexes highlights how hypoxia could be crucial in CML development. In conclusion, we propose a mechanism by which CML cells residing under a low-oxygen tension, i.e., in the leukemia quiescent LSCs, singularly regulate the mTORC2 and its downstream effectors.
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Affiliation(s)
- Cristina Panuzzo
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy
- Correspondence:
| | - Lucrezia Pironi
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy
| | - Alessandro Maglione
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy
| | - Simone Rocco
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy
| | - Serena Stanga
- Department of Neuroscience Rita Levi Montalcini, Neuroscience Institute Cavalieri Ottolenghi, University of Turin, 10043 Turin, Italy
| | - Chiara Riganti
- Department of Oncology, University of Turin, 10043 Turin, Italy
| | - Joanna Kopecka
- Department of Oncology, University of Turin, 10043 Turin, Italy
| | - Muhammad Shahzad Ali
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy
| | - Barbara Pergolizzi
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy
| | - Enrico Bracco
- Department of Oncology, University of Turin, 10043 Turin, Italy
| | - Daniela Cilloni
- Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy
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9
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Maurya N, Mohanty P, Panchal P, Shanmukhaiah C, Vundinti BR. Over expression of mTOR gene predicts overall survival in myelodysplastic syndromes. Mol Biol Rep 2023; 50:235-244. [PMID: 36322239 DOI: 10.1007/s11033-022-07973-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 09/21/2022] [Indexed: 11/05/2022]
Abstract
BACKGROUND Myelodysplastic syndromes (MDS) is defined as heterogenous disease, it contains heterogenous leukemic stem cells with various degree of cell differentiation. The perturbation of genes involved in myeloid progenitor cell growth, differentiation and proliferation lead to morphologic dysplasia, maturation arrest, ineffective hematopoiesis hence the cytopenias and propensity to develop into acute myeloid leukemia (AML). Heterogeneous subsets of MDS patients have been defined by their clinical and biologic abnormalities. These different features lead to the development of different prognostic system; however, these approaches are limited in predicting clinical course, and management of patients remains challenging given the uncertainty of the time course of disease progression. It is of importance to identify transcriptomic marker causing maturational and differentiation arrest which could help in understanding the pathogenesis of disease. METHODS AND RESULTS We have studied differential gene expression profiles (GEPs) in CD34 + marrow cells from myelodysplastic syndrome (MDS) patients (n = 14) and control CD34 + cells using Affymetrix Human Clariom S microarray with 20,000 well annotated genes. We found 4165 genes significantly (p < 0.05) differentially expressed in MDS. Using stringent bioinformatics analyses, we were able to identify few genes (MAPK8, JUNB, mTOR) which were differentially upregulated i.e. 5.39, 73.61 and 2.7 fold change observed in MDS than control and also validated (n = 60) these genes by RT - qPCR. Kaplan - Meier survival analysis indicated that MAPK8 and JUNB could be poor prognostic marker as patients with increased expression showed poor survival, whereas surprisingly mTOR increased expression proved to be good prognostic marker. The correlation analysis showed that the level of gene (MAPK8, JUNB, mTOR) expression was significantly (p ≤ 0.05) associated with frequency of genetic lesions. Interestingly the increased expression of MAPK8 was significantly accompanied with ASXL1 gene mutation. CONCLUSION Our study showed an elevation of TNF and AMPK signalling pathways in MDS. TNF signalling might be mediating the proliferative advantage to myeloid clonal cells (mutation carrying cells) over normal cells, whereas, AMPK signalling could be acting as protector against it (favouring normal cells). Hence it would be interesting to explore the functions and pathways associated with mTOR, AMPK, MAPK8 and JUNB in myelopoiesis related diseases like MDS.
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Affiliation(s)
- Nehakumari Maurya
- Department of Cytogenetics, ICMR-National Institute of Immunohematology, K.E.M. Hospital Campus, Mumbai, Maharashtra, India
| | - Purvi Mohanty
- Department of Cytogenetics, ICMR-National Institute of Immunohematology, K.E.M. Hospital Campus, Mumbai, Maharashtra, India
| | - Purvi Panchal
- Department of Cytogenetics, ICMR-National Institute of Immunohematology, K.E.M. Hospital Campus, Mumbai, Maharashtra, India
| | | | - Babu Rao Vundinti
- Department of Cytogenetics, ICMR-National Institute of Immunohematology, K.E.M. Hospital Campus, Mumbai, Maharashtra, India.
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10
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Fletcher D, Brown E, Javadala J, Uysal‐Onganer P, Guinn B. microRNA expression in acute myeloid leukaemia: New targets for therapy? EJHAEM 2022; 3:596-608. [PMID: 36051053 PMCID: PMC9421970 DOI: 10.1002/jha2.441] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 03/27/2022] [Accepted: 03/31/2022] [Indexed: 11/09/2022]
Abstract
Recent studies have shown that short non-coding RNAs, known as microRNAs (miRNAs) and their dysregulation, are implicated in the pathogenesis of acute myeloid leukaemia (AML). This is due to their role in the control of gene expression in a variety of molecular pathways. Therapies involving miRNA suppression and replacement have been developed. The normalisation of expression and the subsequent impact on AML cells have been investigated for some miRNAs, demonstrating their potential to act as therapeutic targets. Focussing on miRs with therapeutic potential, we have reviewed those that have a significant impact on the aberrant biological processes associated with AML, and crucially, impact leukaemic stem cell survival. We describe six miRNAs in preclinical trials (miR-21, miR-29b, miR-126, miR-181a, miR-223 and miR-196b) and two miRNAs that are in clinical trials (miR-29 and miR-155). However none have been used to treat AML patients and greater efforts are needed to develop miRNA therapies that could benefit AML patients in the future.
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Affiliation(s)
| | - Elliott Brown
- Department of Biomedical SciencesUniversity of HullHull, UK
| | | | - Pinar Uysal‐Onganer
- Cancer Research GroupSchool of Life SciencesUniversity of WestminsterLondonUK
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11
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Calciolari B, Scarpinello G, Tubi LQ, Piazza F, Carrer A. Metabolic control of epigenetic rearrangements in B cell pathophysiology. Open Biol 2022; 12:220038. [PMID: 35580618 PMCID: PMC9113833 DOI: 10.1098/rsob.220038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 04/26/2022] [Indexed: 01/04/2023] Open
Abstract
Both epigenetic and metabolic reprogramming guide lymphocyte differentiation and can be linked, in that metabolic inputs can be integrated into the epigenome to inform cell fate decisions. This framework has been thoroughly investigated in several pathophysiological contexts, including haematopoietic cell differentiation. In fact, metabolite availability dictates chromatin architecture and lymphocyte specification, a multi-step process where haematopoietic stem cells become terminally differentiated lymphocytes (effector or memory) to mount the adaptive immune response. B and T cell precursors reprogram their cellular metabolism across developmental stages, not only to meet ever-changing energetic demands but to impose chromatin accessibility and regulate the function of master transcription factors. Metabolic control of the epigenome has been extensively investigated in T lymphocytes, but how this impacts type-B life cycle remains poorly appreciated. This assay will review our current understanding of the connection between cell metabolism and epigenetics at crucial steps of B cell maturation and how its dysregulation contributes to malignant transformation.
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Affiliation(s)
- Beatrice Calciolari
- Department of Biology (DiBio), of the University of Padova, Padova, Italy
- Department of Medicine (DIMED), Hematology and Clinical Immunology Section, of the University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy
| | - Greta Scarpinello
- Department of Surgical, Oncological and Gastroenterological Sciences (DiSCOG), of the University of Padova, Padova, Italy
| | - Laura Quotti Tubi
- Department of Medicine (DIMED), Hematology and Clinical Immunology Section, of the University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy
| | - Francesco Piazza
- Department of Medicine (DIMED), Hematology and Clinical Immunology Section, of the University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy
| | - Alessandro Carrer
- Department of Biology (DiBio), of the University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy
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12
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Mesbahi Y, Trahair TN, Lock RB, Connerty P. Exploring the Metabolic Landscape of AML: From Haematopoietic Stem Cells to Myeloblasts and Leukaemic Stem Cells. Front Oncol 2022; 12:807266. [PMID: 35223487 PMCID: PMC8867093 DOI: 10.3389/fonc.2022.807266] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 01/18/2022] [Indexed: 12/13/2022] Open
Abstract
Despite intensive chemotherapy regimens, up to 60% of adults with acute myeloid leukaemia (AML) will relapse and eventually succumb to their disease. Recent studies suggest that leukaemic stem cells (LSCs) drive AML relapse by residing in the bone marrow niche and adapting their metabolic profile. Metabolic adaptation and LSC plasticity are novel hallmarks of leukemogenesis that provide important biological processes required for tumour initiation, progression and therapeutic responses. These findings highlight the importance of targeting metabolic pathways in leukaemia biology which might serve as the Achilles' heel for the treatment of AML relapse. In this review, we highlight the metabolic differences between normal haematopoietic cells, bulk AML cells and LSCs. Specifically, we focus on four major metabolic pathways dysregulated in AML; (i) glycolysis; (ii) mitochondrial metabolism; (iii) amino acid metabolism; and (iv) lipid metabolism. We then outline established and emerging drug interventions that exploit metabolic dependencies of leukaemic cells in the treatment of AML. The metabolic signature of AML cells alters during different biological conditions such as chemotherapy and quiescence. Therefore, targeting the metabolic vulnerabilities of these cells might selectively eradicate them and improve the overall survival of patients with AML.
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Affiliation(s)
- Yashar Mesbahi
- Children's Cancer Institute, Lowy Cancer Centre, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia.,School of Women's and Children's Health, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia.,University of New South Wales Centre for Childhood Cancer Research, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia
| | - Toby N Trahair
- Children's Cancer Institute, Lowy Cancer Centre, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia.,School of Women's and Children's Health, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia.,Kids Cancer Centre, Sydney Children's Hospital, Randwick, NSW, Australia
| | - Richard B Lock
- Children's Cancer Institute, Lowy Cancer Centre, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia.,School of Women's and Children's Health, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia.,University of New South Wales Centre for Childhood Cancer Research, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia
| | - Patrick Connerty
- Children's Cancer Institute, Lowy Cancer Centre, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia.,School of Women's and Children's Health, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia.,University of New South Wales Centre for Childhood Cancer Research, University of New South Wales (UNSW) Sydney, Kensington, NSW, Australia
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13
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Reducing FASN expression sensitizes acute myeloid leukemia cells to differentiation therapy. Cell Death Differ 2021; 28:2465-2481. [PMID: 33742137 PMCID: PMC8329134 DOI: 10.1038/s41418-021-00768-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 02/14/2021] [Accepted: 03/01/2021] [Indexed: 01/31/2023] Open
Abstract
Fatty acid synthase (FASN) is the only human lipogenic enzyme available for de novo fatty acid synthesis and is often highly expressed in cancer cells. We found that FASN mRNA levels were significantly higher in acute myeloid leukemia (AML) patients than in healthy granulocytes or CD34+ hematopoietic progenitors. Accordingly, FASN levels decreased during all-trans retinoic acid (ATRA)-mediated granulocytic differentiation of acute promyelocytic leukemia (APL) cells, partially via autophagic degradation. Furthermore, our data suggest that inhibition of FASN expression levels using RNAi or (-)-epigallocatechin-3-gallate (EGCG) accelerated the differentiation of APL cell lines and significantly re-sensitized ATRA refractory non-APL AML cells. FASN reduction promoted translocation of transcription factor EB (TFEB) to the nucleus, paralleled by activation of CLEAR network genes and lysosomal biogenesis. Together, our data demonstrate that inhibition of FASN expression in combination with ATRA treatment facilitates granulocytic differentiation of APL cells and may extend differentiation therapy to non-APL AML cells.
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14
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Collins GP, Clevenger TN, Burke KA, Yang B, MacDonald A, Cunningham D, Fox CP, Goy A, Gribben J, Nowakowski GS, Roschewski M, Vose JM, Vallurupalli A, Cheung J, Raymond A, Nuttall B, Stetson D, Dougherty BA, Schalkwijk S, Carnevalli LS, Willis B, Tao L, Harrington EA, Hamdy A, Izumi R, Pease JE, Frigault MM, Flinn I. A phase 1/2 study of the combination of acalabrutinib and vistusertib in patients with relapsed/refractory B-cell malignancies. Leuk Lymphoma 2021; 62:2625-2636. [PMID: 34269152 DOI: 10.1080/10428194.2021.1938027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
In a phase 1b study of acalabrutinib (a covalent Bruton tyrosine kinase (BTK) inhibitor) in combination with vistusertib (a dual mTORC1/2 inhibitor) in patients with relapsed/refractory diffuse large B-cell lymphoma (DLBCL), multiple ascending doses of the combination as intermittent or continuous schedules of vistusertib were evaluated. The overall response rate was 12% (3/25). The pharmacodynamic (PD) profile for acalabrutinib showed that BTK occupancy in all patients was >95%. In contrast, PD analysis for vistusertib showed variable inhibition of phosphorylated 4EBP1 (p4EBP1) without modulation of AKT phosphorylation (pAKT). The pharmacokinetic (PK)/PD relationship of vistusertib was direct for TORC1 inhibition (p4EBP1) but did not correlate with TORC2 inhibition (pAKT). Cell-of-origin subtyping or next-generation sequencing did not identify a subset of DLBCL patients with clinical benefit; however, circulating tumor DNA dynamics correlated with radiographic response. These data suggest that vistusertib does not modulate targets sufficiently to add to the clinical activity of acalabrutinib monotherapy. Clinicaltrials.gov identifier: NCT03205046.
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Affiliation(s)
- Graham P Collins
- NIHR Oxford Biomedical Research Center, Oxford Cancer and Haematology Centre, Churchill Hospital, Oxford, UK
| | | | - Kathleen A Burke
- Translational Medicine, Oncology R&D, AstraZeneca, Boston, MA, USA
| | - Buyue Yang
- Acerta Pharma, South San Francisco, CA, USA
| | - Alex MacDonald
- Clinical Pharmacology & Safety Sciences, Oncology R&D, AstraZeneca, Cambridge, UK
| | - David Cunningham
- Gastrointestinal and Lymphoma Unit, Royal Marsden and Institute of Cancer Research Biomedical Research Centre, London, UK
| | - Christopher P Fox
- Department of Clinical Haematology, Nottingham University Hospitals NHS Trust and Division of Cancer and Stem Cells, University of Nottingham, Nottingham, UK
| | - Andre Goy
- Department of Medicine, John Theurer Cancer Center, Hackensack University Medical Center, Hackensack, NJ, USA
| | - John Gribben
- Department of Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, UK
| | | | - Mark Roschewski
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Julie M Vose
- Division of Hematology/Oncology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Anusha Vallurupalli
- Division of Hematologic Malignancies and Cellular Therapeutics, University of Kansas Medical Center, Kansas City, KS, USA
| | | | - Amelia Raymond
- Translational Medicine, Oncology R&D, AstraZeneca, Boston, MA, USA
| | - Barrett Nuttall
- Translational Medicine, Oncology R&D, AstraZeneca, Boston, MA, USA
| | - Dan Stetson
- Translational Medicine, Oncology R&D, AstraZeneca, Boston, MA, USA
| | | | - Stein Schalkwijk
- Clinical Pharmacology & Safety Sciences, Oncology R&D, AstraZeneca, Cambridge, UK
| | | | | | - Lin Tao
- Biometrics, Oncology R&D, AstraZeneca, South San Francisco, CA, USA
| | | | | | | | | | | | - Ian Flinn
- Sarah Cannon Center for Blood Cancer, Nashville, TN, USA
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15
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Emadi A, Kapadia B, Bollino D, Bhandary B, Baer MR, Niyongere S, Strovel ET, Kaizer H, Chang E, Choi EY, Ma X, Tighe KM, Carter-Cooper B, Moses BS, Civin CI, Mahurkar A, Shetty AC, Gartenhaus RB, Kamangar F, Lapidus RG. Venetoclax and pegcrisantaspase for complex karyotype acute myeloid leukemia. Leukemia 2021; 35:1907-1924. [PMID: 33199836 PMCID: PMC10976320 DOI: 10.1038/s41375-020-01080-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 09/25/2020] [Accepted: 10/25/2020] [Indexed: 12/14/2022]
Abstract
Complex karyotype acute myeloid leukemia (CK-AML) has a dismal outcome with current treatments, underscoring the need for new therapies. Here, we report synergistic anti-leukemic activity of the BCL-2 inhibitor venetoclax (Ven) and the asparaginase formulation Pegylated Crisantaspase (PegC) in CK-AML in vitro and in vivo. Ven-PegC combination inhibited growth of multiple AML cell lines and patient-derived primary CK-AML cells in vitro. In vivo, Ven-PegC showed potent reduction of leukemia burden and improved survival, compared with each agent alone, in a primary patient-derived CK-AML xenograft. Superiority of Ven-PegC, compared to single drugs, and, importantly, the clinically utilized Ven-azacitidine combination, was also demonstrated in vivo in CK-AML. We hypothesized that PegC-mediated plasma glutamine depletion inhibits 4EBP1 phosphorylation, decreases the expression of proteins such as MCL-1, whose translation is cap dependent, synergizing with the BCL-2 inhibitor Ven. Ven-PegC treatment decreased cellular MCL-1 protein levels in vitro by enhancing eIF4E-4EBP1 interaction on the cap-binding complex via glutamine depletion. In vivo, Ven-PegC treatment completely depleted plasma glutamine and asparagine and inhibited mRNA translation and cellular protein synthesis. Since this novel mechanistically-rationalized regimen combines two drugs already in use in acute leukemia treatment, we plan a clinical trial of the Ven-PegC combination in relapsed/refractory CK-AML.
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Affiliation(s)
- Ashkan Emadi
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA.
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.
- Department of Pharmacology, University of Maryland School of Medicine, Baltimore, MD, USA.
| | - Bandish Kapadia
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
- Department of Internal Medicine, Virginia Commonwealth University School of Medicine, Hunter Holmes McGuire Veterans Affairs Medical Center, Richmond, USA
| | - Dominique Bollino
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Binny Bhandary
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
| | - Maria R Baer
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Sandrine Niyongere
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Erin T Strovel
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Hannah Kaizer
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Elizabeth Chang
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
| | - Eun Yong Choi
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
| | - Xinrong Ma
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
| | - Kayla M Tighe
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
| | - Brandon Carter-Cooper
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
| | - Blake S Moses
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD, USA
- University of Maryland Center for Stem Cell Biology & Regenerative Medicine, Baltimore, MD, USA
| | - Curt I Civin
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
- Department of Pediatrics, University of Maryland School of Medicine, Baltimore, MD, USA
- University of Maryland Center for Stem Cell Biology & Regenerative Medicine, Baltimore, MD, USA
- Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Anup Mahurkar
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
- Institute of Genome Sciences, University of Maryland, Baltimore, MD, USA
| | - Amol C Shetty
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
- Institute of Genome Sciences, University of Maryland, Baltimore, MD, USA
| | - Ronald B Gartenhaus
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Internal Medicine, Virginia Commonwealth University School of Medicine, Hunter Holmes McGuire Veterans Affairs Medical Center, Richmond, USA
| | - Farin Kamangar
- Department of Biology, School of Computer, Mathematical, and Natural Sciences, Morgan State University, Baltimore, MD, USA
| | - Rena G Lapidus
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
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16
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Ge Z, Song C, Ding Y, Tan BH, Desai D, Sharma A, Gowda R, Yue F, Huang S, Spiegelman V, Payne JL, Reeves ME, Iyer S, Dhanyamraju PK, Imamura Y, Bogush D, Bamme Y, Yang Y, Soliman M, Kane S, Dovat E, Schramm J, Hu T, McGrath M, Chroneos ZC, Payne KJ, Gowda C, Dovat S. Dual targeting of MTOR as a novel therapeutic approach for high-risk B-cell acute lymphoblastic leukemia. Leukemia 2021; 35:1267-1278. [PMID: 33531656 PMCID: PMC8102195 DOI: 10.1038/s41375-021-01132-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/28/2020] [Accepted: 01/07/2021] [Indexed: 01/30/2023]
Abstract
Children of Hispanic/Latino ancestry have increased incidence of high-risk B-cell acute lymphoblastic leukemia (HR B-ALL) with poor prognosis. This leukemia is characterized by a single-copy deletion of the IKZF1 (IKAROS) tumor suppressor and increased activation of the PI3K/AKT/mTOR pathway. This identifies mTOR as an attractive therapeutic target in HR B-ALL. Here, we report that IKAROS represses MTOR transcription and IKAROS' ability to repress MTOR in leukemia is impaired by oncogenic CK2 kinase. Treatment with the CK2 inhibitor, CX-4945, enhances IKAROS activity as a repressor of MTOR, resulting in reduced expression of MTOR in HR B-ALL. Thus, we designed a novel therapeutic approach that implements dual targeting of mTOR: direct inhibition of the mTOR protein (with rapamycin), in combination with IKAROS-mediated transcriptional repression of the MTOR gene (using the CK2 inhibitor, CX-4945). Combination treatment with rapamycin and CX-4945 shows synergistic therapeutic effects in vitro and in patient-derived xenografts from Hispanic/Latino children with HR B-ALL. These data suggest that such therapy has the potential to reduce the health disparity in HR B-ALL among Hispanic/Latino children. The dual targeting of oncogene transcription, combined with inhibition of the corresponding oncoprotein provides a paradigm for a novel precision medicine approach for treating hematological malignancies.
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Affiliation(s)
- Zheng Ge
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
- Zhongda Hospital, Medical School of Southeast University Nanjing, 210009, Nanjing, China
| | - Chunhua Song
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
- Ohio State University College of Medicine, Columbus, OH, 43210, USA
| | - Yali Ding
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Bi-Hua Tan
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Dhimant Desai
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Arati Sharma
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Raghavendra Gowda
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Feng Yue
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Suming Huang
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | | | - Jonathon L Payne
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
- Loma Linda University College of Medicine, Loma Linda, CA, 92350, USA
| | - Mark E Reeves
- Loma Linda University College of Medicine, Loma Linda, CA, 92350, USA
| | - Soumya Iyer
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | | | - Yuka Imamura
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Daniel Bogush
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Yevgeniya Bamme
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Yiping Yang
- Ohio State University College of Medicine, Columbus, OH, 43210, USA
| | - Mario Soliman
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Shriya Kane
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Elanora Dovat
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Joseph Schramm
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Tommy Hu
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Mary McGrath
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Zissis C Chroneos
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA
| | - Kimberly J Payne
- Loma Linda University College of Medicine, Loma Linda, CA, 92350, USA
| | - Chandrika Gowda
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA.
| | - Sinisa Dovat
- Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA.
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17
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Vlachavas EI, Bohn J, Ückert F, Nürnberg S. A Detailed Catalogue of Multi-Omics Methodologies for Identification of Putative Biomarkers and Causal Molecular Networks in Translational Cancer Research. Int J Mol Sci 2021; 22:2822. [PMID: 33802234 PMCID: PMC8000236 DOI: 10.3390/ijms22062822] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/05/2021] [Accepted: 03/05/2021] [Indexed: 02/06/2023] Open
Abstract
Recent advances in sequencing and biotechnological methodologies have led to the generation of large volumes of molecular data of different omics layers, such as genomics, transcriptomics, proteomics and metabolomics. Integration of these data with clinical information provides new opportunities to discover how perturbations in biological processes lead to disease. Using data-driven approaches for the integration and interpretation of multi-omics data could stably identify links between structural and functional information and propose causal molecular networks with potential impact on cancer pathophysiology. This knowledge can then be used to improve disease diagnosis, prognosis, prevention, and therapy. This review will summarize and categorize the most current computational methodologies and tools for integration of distinct molecular layers in the context of translational cancer research and personalized therapy. Additionally, the bioinformatics tools Multi-Omics Factor Analysis (MOFA) and netDX will be tested using omics data from public cancer resources, to assess their overall robustness, provide reproducible workflows for gaining biological knowledge from multi-omics data, and to comprehensively understand the significantly perturbed biological entities in distinct cancer types. We show that the performed supervised and unsupervised analyses result in meaningful and novel findings.
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Affiliation(s)
- Efstathios Iason Vlachavas
- Medical Informatics for Translational Oncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (J.B.); (F.Ü.)
| | - Jonas Bohn
- Medical Informatics for Translational Oncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (J.B.); (F.Ü.)
| | - Frank Ückert
- Medical Informatics for Translational Oncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (J.B.); (F.Ü.)
- Applied Medical Informatics, University Hospital Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Sylvia Nürnberg
- Medical Informatics for Translational Oncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (J.B.); (F.Ü.)
- Applied Medical Informatics, University Hospital Hamburg-Eppendorf, 20251 Hamburg, Germany
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Parcha PK, Sarvagalla S, Ashok C, Sudharshan SJ, Dyavaiah M, Coumar MS, Rajasekaran B. Repositioning antispasmodic drug Papaverine for the treatment of chronic myeloid leukemia. Pharmacol Rep 2021; 73:615-628. [PMID: 33389727 DOI: 10.1007/s43440-020-00196-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 11/08/2020] [Accepted: 11/16/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND Papaverine is a benzylisoquinoline alkaloid from the plant Papaver somniferum (Opium poppy). It is approved as an antispasmodic drug by the US FDA and is also reported to have anti-cancer properties. Here, Papaverine's activity in chronic myeloid leukemia (CML) is explored using Saccharomyces cerevisiae, mammalian cancer cell lines, and in silico studies. METHODS The sensitivity of wild-type and mutant (anti-oxidant defense, apoptosis) strains of S. cerevisiae to the drug Papaverine was tested by colony formation, spot assays, and AO/EB staining. In vitro cytotoxic effect was investigated on HCT15 (colon), A549 (lung), HeLa (cervical), and K562 (Bcr-Abl positive CML), and RAW 264.7 cell lines; cell cycle, mitochondrial membrane potential, ROS detection analyzed in K562 cells using flow cytometry and apoptotic markers, Bcr-Abl signaling pathways examined by western blotting. Molecular docking and molecular dynamics simulation of Papaverine against the target Bcr-Abl were also carried out. RESULTS Investigation in S. cerevisiae evidenced Papaverine induces ROS-mediated apoptosis. Subsequent in vitro examination showed that CML cell line K562 was more sensitive to the drug Papaverine. Papaverine induces ROS generation, promotes apoptosis, and inhibits Bcr-Abl downstream signaling. Papaverine acts synergistically with the drug Imatinib. Furthermore, the docking and molecular dynamic simulation studies supported that Papaverine binds to the allosteric site of Bcr-Abl. CONCLUSION The data presented here have added support to the concept of polypharmacology of existing drugs and natural compounds to interact with more than one target. This study provides a proof-of-concept for repositioning Papaverine as an anti-CML drug.
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Affiliation(s)
- Phani Krishna Parcha
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Pondicherry University, Puducherry, India
- DBT-Interdisciplinary Program in Life Sciences, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Sailu Sarvagalla
- Centre for Bioinformatics, School of Life Sciences, Pondicherry University, Puducherry, 605014, India
| | - Cheemala Ashok
- Department of Biotechnology, School of Life Sciences, Pondicherry University, Puducherry, 605014, India
| | - S J Sudharshan
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Pondicherry University, Puducherry, India
- DBT-Interdisciplinary Program in Life Sciences, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Madhu Dyavaiah
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Pondicherry University, Puducherry, India
- DBT-Interdisciplinary Program in Life Sciences, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Mohane Selvaraj Coumar
- Centre for Bioinformatics, School of Life Sciences, Pondicherry University, Puducherry, 605014, India.
| | - Baskaran Rajasekaran
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Pondicherry University, Puducherry, India
- DBT-Interdisciplinary Program in Life Sciences, School of Life Sciences, Pondicherry University, Puducherry, India
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Klimaszewska-Wiśniewska A, Grzanka D, Czajkowska P, Hałas-Wiśniewska M, Durślewicz J, Antosik P, Grzanka A, Gagat M. Cellular and molecular alterations induced by low‑dose fisetin in human chronic myeloid leukemia cells. Int J Oncol 2019; 55:1261-1274. [PMID: 31638196 PMCID: PMC6831210 DOI: 10.3892/ijo.2019.4889] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 09/11/2019] [Indexed: 12/23/2022] Open
Abstract
The present study aimed to evaluate the cellular and molecular effects of low concentrations of the flavonoid, fisetin, on K562 human chronic myeloid leukemia cells, in the context of both potential anti-proliferative and anti-metastatic effects. Thiazolyl blue tetrazolium bromide assay, Trypan blue exclusion assay, Annexin V/propidium iodide test, cell cycle analysis, Transwell migration and invasion assays, the fluorescence staining of β-catenin and F-actin as well as reverse transcription-quantitative polymerase chain reaction were performed to achieve the research goal. Furthermore, the nature of the interaction between fisetin and arsenic trioxide in the K562 cells was analyzed according to the Chou-Talalay median-effect method. We found that low concentrations of fisetin had not only a negligible effect on the viability and apoptosis of the K562 cells, but also modulated the mRNA levels of selected metastatic-related markers, accompanied by an increase in the migratory and invasive properties of these cancer cells. Although some markers of cell death were significantly elevated in response to fisetin treatment, these were counterbalanced through anti-apoptotic and pro-survival signals. With decreasing concentrations of fisetin and arsenic trioxide, the antagonistic interactions between the 2 agents increased. On the whole, the findings of this study suggest that careful consideration should be taken when advising cancer patients to take fisetin as a dietary supplement and when considering fisetin as a potential candidate for the treatment of chronic myeloid leukemia. Further more detailed studies are required to confirm our findings.
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Affiliation(s)
- Anna Klimaszewska-Wiśniewska
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85‑092 Bydgoszcz, Poland
| | - Dariusz Grzanka
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85‑092 Bydgoszcz, Poland
| | - Paulina Czajkowska
- Department of Histology and Embryology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85‑092 Bydgoszcz, Poland
| | - Marta Hałas-Wiśniewska
- Department of Histology and Embryology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85‑092 Bydgoszcz, Poland
| | - Justyna Durślewicz
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85‑092 Bydgoszcz, Poland
| | - Paulina Antosik
- Department of Clinical Pathomorphology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85‑092 Bydgoszcz, Poland
| | - Alina Grzanka
- Department of Histology and Embryology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85‑092 Bydgoszcz, Poland
| | - Maciej Gagat
- Department of Histology and Embryology, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85‑092 Bydgoszcz, Poland
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Stuani L, Sabatier M, Sarry JE. Exploiting metabolic vulnerabilities for personalized therapy in acute myeloid leukemia. BMC Biol 2019; 17:57. [PMID: 31319822 PMCID: PMC6637566 DOI: 10.1186/s12915-019-0670-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Changes in cell metabolism and metabolic adaptation are hallmark features of many cancers, including leukemia, that support biological processes involved into tumor initiation, growth, and response to therapeutics. The discovery of mutations in key metabolic enzymes has highlighted the importance of metabolism in cancer biology and how these changes might constitute an Achilles heel for cancer treatment. In this Review, we discuss the role of metabolic and mitochondrial pathways dysregulated in acute myeloid leukemia, and the potential of therapeutic intervention targeting these metabolic dependencies on the proliferation, differentiation, stem cell function and cell survival to improve patient stratification and outcomes.
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Affiliation(s)
- Lucille Stuani
- Centre de Recherches en Cancérologie de Toulouse, UMR1037, Inserm, Université de Toulouse 3 Paul Sabatier, Equipe Labellisée LIGUE 2018, F-31037, Toulouse, France.
| | - Marie Sabatier
- Centre de Recherches en Cancérologie de Toulouse, UMR1037, Inserm, Université de Toulouse 3 Paul Sabatier, Equipe Labellisée LIGUE 2018, F-31037, Toulouse, France
| | - Jean-Emmanuel Sarry
- Centre de Recherches en Cancérologie de Toulouse, UMR1037, Inserm, Université de Toulouse 3 Paul Sabatier, Equipe Labellisée LIGUE 2018, F-31037, Toulouse, France.
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Abstract
The human body regenerates constantly in part under the control of signaling pathways that regulate cell growth [...].
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Targeting mTOR in Acute Lymphoblastic Leukemia. Cells 2019; 8:cells8020190. [PMID: 30795552 PMCID: PMC6406494 DOI: 10.3390/cells8020190] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/12/2019] [Accepted: 02/16/2019] [Indexed: 12/12/2022] Open
Abstract
Acute Lymphoblastic Leukemia (ALL) is an aggressive hematologic disorder and constitutes approximately 25% of cancer diagnoses among children and teenagers. Pediatric patients have a favourable prognosis, with 5-years overall survival rates near 90%, while adult ALL still correlates with poorer survival. However, during the past few decades, the therapeutic outcome of adult ALL was significantly ameliorated, mainly due to intensive pediatric-based protocols of chemotherapy. Mammalian (or mechanistic) target of rapamycin (mTOR) is a conserved serine/threonine kinase belonging to the phosphatidylinositol 3-kinase (PI3K)-related kinase family (PIKK) and resides in two distinct signalling complexes named mTORC1, involved in mRNA translation and protein synthesis and mTORC2 that controls cell survival and migration. Moreover, both complexes are remarkably involved in metabolism regulation. Growing evidence reports that mTOR dysregulation is related to metastatic potential, cell proliferation and angiogenesis and given that PI3K/Akt/mTOR network activation is often associated with poor prognosis and chemoresistance in ALL, there is a constant need to discover novel inhibitors for ALL treatment. Here, the current knowledge of mTOR signalling and the development of anti-mTOR compounds are documented, reporting the most relevant results from both preclinical and clinical studies in ALL that have contributed significantly into their efficacy or failure.
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