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Dominguez EC, Roleder C, Ball B, Danilov AV. Cyclin-dependent kinase-9 in B-cell malignancies: pathogenic role and therapeutic implications. Leuk Lymphoma 2023; 64:1893-1904. [PMID: 37552126 DOI: 10.1080/10428194.2023.2244102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 07/29/2023] [Indexed: 08/09/2023]
Abstract
Cyclin-dependent kinases (CDK) regulate cell cycle and transcriptional activity. Pan-CDK inhibitors demonstrated early efficacy in lymphoid malignancies, but also have been associated with narrow therapeutic index. Among transcriptional CDKs, CDK7 and CDK9 emerged as promising targets. CDK9 serves as a component of P-TEFb elongation complex and thus is indispensable in mRNA transcription. Selective CDK9 inhibitors demonstrated pre-clinical efficacy in in vitro and in vivo models of B-cell non-Hodgkin lymphoma. CDK9 inhibition results in transcriptional pausing with rapid downmodulation of short-lived oncogenic proteins, e.g. Myc and Mcl-1, followed by cell apoptosis. Early phase clinical trials established safety of CDK9 inhibitors, with manageable neutropenia, infections and gastrointestinal toxicities. In this review, we summarize the rationale of targeting CDK9 in lymphoid malignancies, as well as pre-clinical and early clinical data with pan-CDK and selective CDK9 inhibitors.
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Affiliation(s)
| | - Carly Roleder
- City of Hope National Medical Center, Duarte, CA, USA
| | - Brian Ball
- City of Hope National Medical Center, Duarte, CA, USA
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2
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Bröckelmann PJ, de Jong MRW, Jachimowicz RD. Targeting DNA Repair, Cell Cycle, and Tumor Microenvironment in B Cell Lymphoma. Cells 2020; 9:cells9102287. [PMID: 33066395 PMCID: PMC7602196 DOI: 10.3390/cells9102287] [Citation(s) in RCA: 8] [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: 09/21/2020] [Revised: 10/11/2020] [Accepted: 10/12/2020] [Indexed: 01/07/2023] Open
Abstract
The DNA double-strand break (DSB) is the most cytotoxic lesion and compromises genome stability. In an attempt to efficiently repair DSBs, cells activate ATM kinase, which orchestrates the DNA damage response (DDR) by activating cell cycle checkpoints and initiating DSB repair pathways. In physiological B cell development, however, programmed DSBs are generated as intermediates for effective immune responses and the maintenance of genomic integrity. Disturbances of these pathways are at the heart of B cell lymphomagenesis. Here, we review the role of DNA repair and cell cycle control on B cell development and lymphomagenesis. In addition, we highlight the intricate relationship between the DDR and the tumor microenvironment (TME). Lastly, we provide a clinical perspective by highlighting treatment possibilities of defective DDR signaling and the TME in mantle cell lymphoma, which serves as a blueprint for B cell lymphomas.
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Affiliation(s)
- Paul J. Bröckelmann
- Max Planck Research Group Mechanisms of DNA Repair, Max Planck Institute for Biology of Ageing, 50931 Cologne, Germany;
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), University of Cologne, 50937 Cologne, Germany
| | - Mathilde R. W. de Jong
- Department of Hematology, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands;
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands
| | - Ron D. Jachimowicz
- Max Planck Research Group Mechanisms of DNA Repair, Max Planck Institute for Biology of Ageing, 50931 Cologne, Germany;
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD), University of Cologne, 50937 Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany
- Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany
- Correspondence: ; Tel.: +49-(0)221-37970-580
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3
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Inamdar AA, Goy A, Ayoub NM, Attia C, Oton L, Taruvai V, Costales M, Lin YT, Pecora A, Suh KS. Mantle cell lymphoma in the era of precision medicine-diagnosis, biomarkers and therapeutic agents. Oncotarget 2018; 7:48692-48731. [PMID: 27119356 PMCID: PMC5217048 DOI: 10.18632/oncotarget.8961] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 04/10/2016] [Indexed: 12/15/2022] Open
Abstract
Despite advances in the development of clinical agents for treating Mantle Cell Lymphoma (MCL), treatment of MCL remains a challenge due to complexity and frequent relapse associated with MCL. The incorporation of conventional and novel diagnostic approaches such as genomic sequencing have helped improve understanding of the pathogenesis of MCL, and have led to development of specific agents targeting signaling pathways that have recently been shown to be involved in MCL. In this review, we first provide a general overview of MCL and then discuss about the role of biomarkers in the pathogenesis, diagnosis, prognosis, and treatment for MCL. We attempt to discuss major biomarkers for MCL and highlight published and ongoing clinical trials in an effort to evaluate the dominant signaling pathways as drugable targets for treating MCL so as to determine the potential combination of drugs for both untreated and relapse/refractory cases. Our analysis indicates that incorporation of biomarkers is crucial for patient stratification and improve diagnosis and predictability of disease outcome thus help us in designing future precision therapies. The evidence indicates that a combination of conventional chemotherapeutic agents and novel drugs designed to target specific dysregulated signaling pathways can provide the effective therapeutic options for both untreated and relapse/refractory MCL.
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Affiliation(s)
- Arati A Inamdar
- The Genomics and Biomarkers Program, The John Theurer Cancer Center, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Andre Goy
- Clinical Divisions, John Theurer Cancer Center, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Nehad M Ayoub
- Department of Clinical Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
| | - Christen Attia
- The Genomics and Biomarkers Program, The John Theurer Cancer Center, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Lucia Oton
- The Genomics and Biomarkers Program, The John Theurer Cancer Center, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Varun Taruvai
- The Genomics and Biomarkers Program, The John Theurer Cancer Center, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Mark Costales
- The Genomics and Biomarkers Program, The John Theurer Cancer Center, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Yu-Ting Lin
- The Genomics and Biomarkers Program, The John Theurer Cancer Center, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Andrew Pecora
- Clinical Divisions, John Theurer Cancer Center, Hackensack University Medical Center, Hackensack, NJ, USA
| | - K Stephen Suh
- The Genomics and Biomarkers Program, The John Theurer Cancer Center, Hackensack University Medical Center, Hackensack, NJ, USA
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Abstract
CDK9 is a protein in constant development in cancer therapy. Herein we present an overview of the enzyme as a target for cancer therapy. We provide data on its characteristics and mechanism of action. In recent years, CDK9 inhibitors that have been designed with molecular modeling have demonstrated good antitumoral activity in vitro. Clinical studies of the drugs flavopiridol, dinaciclib, seliciclib, SNS-032 and RGB-286638 used as CDK9 inhibitors are also reviewed, with their additional targets and their relative IC50 values. Unfortunately, treatment with these drugs remains unsuccessful and involves many adverse effects. We could conclude that there are many small molecules that bind to CDK9, but their lack of selectivity against other CDKs do not allow them to get to the clinical use. However, drug designers currently have the tools needed to improve the selectivity of CDK9 inhibitors and to make successful treatment available to patients.
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Affiliation(s)
- Fatima Morales
- a Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University , Philadelphia , PA , USA
| | - Antonio Giordano
- a Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University , Philadelphia , PA , USA.,b Department of Medicine , Surgery and Neuroscience, University of Siena , Siena , Italy
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Cinar M, Rosenfelt F, Rokhsar S, Lopategui J, Pillai R, Cervania M, Pao A, Cinar B, Alkan S. Concurrent inhibition of MYC and BCL2 is a potentially effective treatment strategy for double hit and triple hit B-cell lymphomas. Leuk Res 2015; 39:730-8. [DOI: 10.1016/j.leukres.2015.04.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 03/07/2015] [Accepted: 04/06/2015] [Indexed: 12/22/2022]
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Ema Y, Igase M, Takeda Y, Yanase T, Umeki S, Hiraoka H, Okuda M, Mizuno T. Investigation of the cytotoxic effect of flavopiridol in canine lymphoma cell lines. Vet Comp Oncol 2015; 14 Suppl 1:95-106. [DOI: 10.1111/vco.12130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 10/30/2014] [Accepted: 11/04/2014] [Indexed: 11/27/2022]
Affiliation(s)
- Y. Ema
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - M. Igase
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - Y. Takeda
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - T. Yanase
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - S. Umeki
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - H. Hiraoka
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
| | - M. Okuda
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
- Biomedical Science Center for Translational Research; The United Graduate School of Veterinary Science, Yamaguchi University; Yamaguchi Japan
| | - T. Mizuno
- Laboratory of Veterinary Internal Medicine, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
- Laboratory of Molecular Diagnostics and Therapeutics, Joint Faculty of Veterinary Medicine; Yamaguchi University; Yamaguchi Japan
- Biomedical Science Center for Translational Research; The United Graduate School of Veterinary Science, Yamaguchi University; Yamaguchi Japan
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Jones JA, Rupert AS, Poi M, Phelps MA, Andritsos L, Baiocchi R, Benson DM, Blum KA, Christian B, Flynn J, Penza S, Porcu P, Grever MR, Byrd JC. Flavopiridol can be safely administered using a pharmacologically derived schedule and demonstrates activity in relapsed and refractory non-Hodgkin's lymphoma. Am J Hematol 2014; 89:19-24. [PMID: 23959599 PMCID: PMC4150545 DOI: 10.1002/ajh.23568] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2013] [Revised: 07/07/2013] [Accepted: 08/06/2013] [Indexed: 01/14/2023]
Abstract
Flavopiridol is a broad cyclin-dependent kinase inhibitor (CDKI) that induces apoptosis of malignant lymphocytes in vitro and in murine lymphoma models. We conducted a Phase I dose-escalation study to determine the maximum tolerated dose (MTD) for single-agent flavopiridol administered on a pharmacokinetically derived hybrid dosing schedule to patients with relapsed and refractory non-Hodgkin's lymphoma. Dose was escalated independently in one of four cohorts: indolent B-cell (Cohort 1), mantle cell (Cohort 2), intermediate-grade B-cell including transformed lymphoma (Cohort 3), and T-/NK-cell excluding primary cutaneous disease (Cohort 4). Forty-six patients were accrued. Grade 3 or 4 leukopenia was observed in the majority of patients (60%), but infection was infrequent. Common nonhematologic toxicities included diarrhea and fatigue. Biochemical tumor lysis was observed in only two patients, and no patients required hemodialysis for its management. Dose escalation was completed in two cohorts (indolent and aggressive B-cell). Dose-limiting toxicities were not observed, and the MTD was not reached in either cohort at the highest dose tested (50 mg/m(2) bolus + 50 mg/m(2) continuous infusion weekly for 4 consecutive weeks of a 6-week cycle). Clinical benefit was observed in 26% of 43 patients evaluable for response, including 14% with partial responses (two mantle cells, three indolent B-cells, and one diffuse large B-cell). The single-agent activity of this first-generation CDKI suggests that other agents in this class merit further study in lymphoid malignancies, both alone and in combination.
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Affiliation(s)
- Jeffrey A. Jones
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - Amy S. Rupert
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - Ming Poi
- Division of Pharmaceutics, College of Pharmacy, The Ohio State University, Columbus, OH 43210
| | - Mitch A. Phelps
- Division of Pharmaceutics, College of Pharmacy, The Ohio State University, Columbus, OH 43210
| | - Leslie Andritsos
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - Robert Baiocchi
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - Don M. Benson
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - Kristie A. Blum
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - Beth Christian
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - Joseph Flynn
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - Sam Penza
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - Pierluigi Porcu
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - Michael R. Grever
- Division of Hematology, The Ohio State University, Columbus, OH 43210
| | - John C. Byrd
- Division of Hematology, The Ohio State University, Columbus, OH 43210
- Division of Medicinal Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210
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P276-00, a cyclin-dependent kinase inhibitor, modulates cell cycle and induces apoptosis in vitro and in vivo in mantle cell lymphoma cell lines. Mol Cancer 2012; 11:77. [PMID: 23075291 PMCID: PMC3558400 DOI: 10.1186/1476-4598-11-77] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 10/16/2012] [Indexed: 11/29/2022] Open
Abstract
Background Mantle cell lymphoma (MCL) is a well-defined aggressive lymphoid neoplasm characterized by proliferation of mature B-lymphocytes that have a remarkable tendency to disseminate. This tumor is considered as one of the most aggressive lymphoid neoplasms with poor responses to conventional chemotherapy and relatively short survival. Since cyclin D1 and cell cycle control appears as a natural target, small-molecule inhibitors of cyclin-dependent kinases (Cdks) and cyclins may play important role in the therapy of this disorder. We explored P276-00, a novel selective potent Cdk4-D1, Cdk1-B and Cdk9-T1 inhibitor discovered by us against MCL and elucidated its potential mechanism of action. Methods The cytotoxic effect of P276-00 in three human MCL cell lines was evaluated in vitro. The effect of P276-00 on the regulation of cell cycle, apoptosis and transcription was assessed, which are implied in the pathogenesis of MCL. Flow cytometry, western blot, immunoflourescence and siRNA studies were performed. The in vivo efficacy and effect on survival of P276-00 was evaluated in a Jeko-1 xenograft model developed in SCID mice. PK/PD analysis of tumors were performed using LC-MS and western blot analysis. Results P276-00 showed a potent cytotoxic effect against MCL cell lines. Mechanistic studies confirmed down regulation of cell cycle regulatory proteins with apoptosis. P276-00 causes time and dose dependent increase in the sub G1 population as early as from 24 h. Reverse transcription PCR studies provide evidence that P276-00 treatment down regulated transcription of antiapoptotic protein Mcl-1 which is a potential pathogenic protein for MCL. Most importantly, in vivo studies have revealed significant efficacy as a single agent with increased survival period compared to vehicle treated. Further, preliminary combination studies of P276-00 with doxorubicin and bortezomib showed in vitro synergism. Conclusion Our studies thus provide evidence and rational that P276-00 alone or in combination is a potential therapeutic molecule to improve patients’ outcome in mantle cell lymphoma.
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9
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RNA inhibition highlights cyclin D1 as a potential therapeutic target for mantle cell lymphoma. PLoS One 2012; 7:e43343. [PMID: 22905260 PMCID: PMC3419170 DOI: 10.1371/journal.pone.0043343] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Accepted: 07/19/2012] [Indexed: 11/19/2022] Open
Abstract
Mantle cell lymphoma is characterized by a genetic translocation results in aberrant overexpression of the CCND1 gene, which encodes cyclin D1. This protein functions as a regulator of the cell cycle progression, hence is considered to play an important role in the pathogenesis of the disease. In this study, we used RNA interference strategies to examine whether cyclin D1 might serve as a therapeutic target for mantle cell lymphoma. Knocking down cyclin D1 resulted in significant growth retardation, cell cycle arrest, and most importantly, induction of apoptosis. These results mark cyclin D1 as a target for mantle cell lymphoma and emphasize the therapeutic potential hidden in its silencing.
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Abstract
Mantle cell lymphoma is a mature B cell neoplasm constituting 5-7% of all non-Hodgkin lymphoma. Overall prognosis with current therapeutics remains poor, thus numerous novel agents are currently under investigation. In this review we focus on early phase trials that have demonstrated promise in mantle cell. Constitutive activation of signaling components downstream of the B cell receptor play an important role in the pathobiology of mantle cell lymphoma. Targeting of this signaling pathway has become a focus with specific agents under development including inhibitors of spleen tyrosine kinase, phosphoinositide 3-kinase and Bruton's tyrosine kinase. Promising data also supports further development of BH-3 mimetics, a crucial component of anti-apoptotic signaling. Histone deacetylase inhibitors have an established role in cutaneous T-cell lymphoma and are now under investigation in mantle cell lymphoma as well. With further understanding of cellular signaling, the armamentarium of treatment options will be enhanced, with the hope of improving the prognosis of this disease.
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Affiliation(s)
- Marcus S Noel
- University of Rochester Medical Center, James P. Wilmot Cancer Center, 601 Elmwood Avenue, Box 704, Rochester, NY 14642, USA.
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Touzeau C, Dousset C, Bodet L, Gomez-Bougie P, Bonnaud S, Moreau A, Moreau P, Pellat-Deceunynck C, Amiot M, Le Gouill S. ABT-737 induces apoptosis in mantle cell lymphoma cells with a Bcl-2high/Mcl-1low profile and synergizes with other antineoplastic agents. Clin Cancer Res 2011; 17:5973-81. [PMID: 21821698 DOI: 10.1158/1078-0432.ccr-11-0955] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Mantle cell lymphoma (MCL) is considered to be incurable. ABT-737 is a BH3 mimetic that targets Bcl-2, which is overexpressed in MCL and implicated in drug resistance. The present work investigated the antitumor effect of ABT-737. EXPERIMENTAL DESIGN Six MCL cell lines and primary MCL cells (n = 13) were used. Sensitivity to ABT-737 was assessed, and expression levels of Bcl-2 and Mcl-1 were analyzed. Finally, ABT-737 was combined with other cytotoxic agents to promote tailored therapy. RESULTS MINO and GRANTA-519 cell lines were highly sensitive to ABT-737 [the median lethal dose (LD₅₀) = 20 and 80 nmol/L, respectively], whereas other cell lines were resistant. In primary MCL cells, 46% of patients' samples were sensitive to ABT-737. The analysis of protein expression levels revealed that both sensitive cell lines and primary MCL cells could be characterized by a Bcl-2(high)/Mcl-1(low) profile, whereas resistant MCL cells contained high levels of Mcl-1. ABT-737 induced a rapid disruption of both Bcl-2/Bax and Bcl-2/Bik complexes. In addition, silencing of Mcl-1 by siRNA sensitized MCL cell lines to ABT-737. Similarly, flavopiridol, which induces Mcl-1 downregulation, in combination with ABT-737 led to a synergistic anti-MCL effect in ABT-737-resistant cell lines. This synergy was also observed when ABT-737 was combined with either bortezomib or cytarabine. CONCLUSIONS The present work shows that ABT-737 induces strong apoptosis in MCL cells expressing a Bcl-2(high)/Mcl-1(low) profile. In ABT-737-resistant MCL cells, downregulation of Mcl-1 overcomes Mcl-1-induced resistance and synergizes ABT-737 effects. Our results strongly support the use of ABT-737 according to the Bcl-2/Mcl-1 tumor cell profiles in the treatment of MCL.
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Abstract
PURPOSE OF REVIEW Despite current advances in the therapy for newly diagnosed mantle cell lymphoma (MCL), relapsed MCL continues to have a poor prognosis. Advances in our understanding of the molecular pathogenesis of MCL are yielding many promising novel therapies. RECENT FINDINGS This article reviews the unique biology of MCL and describes how our understanding of its cell cycle dysregulation, and impaired apoptotic pathways is yielding many potential therapeutic targets including cyclin D1 and the cell cycle regulatory proteins, inhibitors of mammalian target of rapamycin, the proteasome, and proapoptotic family members. Recent preclinical and clinical data with cdk inhibitors, histone deacetylase inhibitors, the proteasome inhibitor bortezomib, mammalian target of rapamycin inhibitors, and other experimental strategies such as immunotherapy and microRNA are discussed. SUMMARY Understanding these targeted therapies in the context of the biology of MCL, has the potential to develop novel therapeutic platforms for the treatment of relapsed MCL, and will hopefully change the outcome for patients with this challenging clinical condition.
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Chen R, Chubb S, Cheng T, Hawtin RE, Gandhi V, Plunkett W. Responses in mantle cell lymphoma cells to SNS-032 depend on the biological context of each cell line. Cancer Res 2010; 70:6587-97. [PMID: 20663900 DOI: 10.1158/0008-5472.can-09-3578] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
SNS-032 is a potent inhibitor of cyclin-dependent kinases (Cdk) 2, 7, and 9 that regulate the cell cycle and transcription. Our studies in indolent primary chronic lymphocytic leukemia cells showed that SNS-032 inhibited transcription, diminished the antiapoptotic protein Mcl-1, and induced apoptosis. The present study focuses on evaluating this compound in four proliferating mantle cell lymphoma lines (Jeko-1, Granta 519, Mino, and SP-53). Consistent with its action against Cdk9 and Cdk7, SNS-032 inhibited the phosphorylation of RNA pol II in all four lines and blocked RNA synthesis. The transcripts and protein levels of short-lived proteins decreased, including cyclin D1 and Mcl-1. Cell growth was inhibited in a concentration-dependent manner in all lines. Apoptosis was induced in JeKo-1, Mino, and SP-53 cells without disrupting cell cycle distribution. However, apoptosis was limited in Granta cells; rather, there was a significant reduction of clonogenic survival. Small interfering RNA was used to specifically knock down Mcl-1 and cyclin D1 in JeKo-1 and Granta cells. Knocking down Mcl-1 induced significant apoptosis in Jeko-1 cells but not Granta cells. Reducing cyclin D1, rather than Mcl-1, was associated with loss of clonogenic survival in Granta cells. Thus, these results indicated that mantle cell lymphoma cell lines have distinct mechanisms sustaining their survival, and the mechanism of action of SNS-032 is dependent on the biological context of an individual line.
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Affiliation(s)
- Rong Chen
- Department of Experimental Therapeutics, University of Texas MD Anderson Cancer Center and Graduate School of Biomedical Sciences, University of Texas Houston Health Science Center, Houston, Texas 77030, USA
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Abstract
There has been tremendous insight gained in the last two decades from basic science research. New molecular targets in neoplastic cells are emerging and provide the rationale for clinical development of novel agents in non-Hodgkin lymphoma. These novel agents can be broadly categorized into two groups. The first is by immunotherapy which includes novel monoclonal antibodies and immunomodulating drugs, which takes advantage of or optimizes immune system function. The other group of drugs target small molecules that may play an important role in tumorigenesis. The mechanisms of anti-tumor activity include targeting apoptotic pathways, inhibition of proteasomes, mammalian target of rapamycin (mTOR), cyclin-dependent kinases and histone deacetylases. The purpose of this review is to focus on these novel agents and the various treatment approaches that are currently being evaluated in non-Hodgkin lymphoma.
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Affiliation(s)
- Kevin Tay
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Centre Drive, Bethesda, MD 20892-1203, USA
| | - Kieron Dunleavy
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Centre Drive, Bethesda, MD 20892-1203, USA
| | - Wyndham H. Wilson
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, 10 Centre Drive, Bethesda, MD 20892-1203, USA
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15
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Dennison JB, Balakrishnan K, Gandhi V. Preclinical activity of 8-chloroadenosine with mantle cell lymphoma: roles of energy depletion and inhibition of DNA and RNA synthesis. Br J Haematol 2009; 147:297-307. [PMID: 19709085 DOI: 10.1111/j.1365-2141.2009.07850.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
8-Chloroadenosine (8-Cl-Ado), an RNA-directed nucleoside analogue, is currently under evaluation in phase I clinical trials for treatment of chronic lymphocytic leukaemia. In the current study, the efficacy of 8-Cl-Ado was evaluated using mantle cell lymphoma (MCL) cell lines: Granta 519, JeKo, Mino, and SP-53. After continuous exposure to 10 mumol/l 8-Cl-Ado for 24 h, loss of mitochondrial transmembrane potential and poly [adenosine diphosphate (ADP)-ribose] polymerase (PARP) cleavage were detected in three of four cell lines. Reduced ATP levels (30-60% reduction) and concurrent 8-Cl-ATP accumulation were highly associated with cell death (P < 0.01). The intracellular 8-Cl-ATP concentrations were also highly correlated with inhibition of global transcription (50-90%, r(2) = 0.90, P < 0.01). However, the inhibition of transcription only accounted for 30-40% of cell death as determined by equivalent inhibition with actinomycin D. Likewise, short-lived mRNAs, those encoding cyclin D1 and Mcl-1, were not consistently reduced after treatment. Unique to MCL as compared to other haematological malignancies, 8-Cl-Ado inhibited the rates of DNA synthesis and selectively depleted dATP pools (50-80%). We conclude that the DNA and RNA directed actions of 8-Cl-Ado in combination with depleted energetics may promote cell death and inhibit growth of MCL cell lines.
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Affiliation(s)
- Jennifer B Dennison
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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16
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Klier M, Anastasov N, Hermann A, Meindl T, Angermeier D, Raffeld M, Fend F, Quintanilla-Martinez L. Specific lentiviral shRNA-mediated knockdown of cyclin D1 in mantle cell lymphoma has minimal effects on cell survival and reveals a regulatory circuit with cyclin D2. Leukemia 2008; 22:2097-105. [PMID: 18685613 DOI: 10.1038/leu.2008.213] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Cyclin D1 overexpression is the hallmark of mantle cell lymphoma (MCL). However, the importance of cyclin D1 in the maintenance and progression of the disease remains to be defined. The aim of this study was to elucidate the role of cyclin D1 overexpression using an efficient cyclin D1-shRNA and a lentiviral system in well-characterized MCL cell lines. Surprisingly, the knockdown of cyclin D1 led to a moderate retardation in growth, without induction of apoptosis. The cyclin D1-shRNA-transduced MCL cells showed a 15% shift from S phase to G(1) phase of the cell cycle, a weak induction of p27(Kip1), decreased Rb (Ser807/811) phosphorylation, and a consistent upregulation of cyclin D2 mRNA and protein expression. However, double knockdown of cyclins D1 and D2 did not intensify the effects observed with cyclin D1 knockdown alone. These data suggest that the moderate effects of cyclin D1 downregulation on survival and proliferation are likely the result of compensatory cyclin-independent mechanisms governing proliferation or alternatively, secondary genetic events that make cyclin D1 dispensable. These findings have important implications for MCL therapy, as strategies targeting only cyclin D1 function might be hampered by compensatory regulatory mechanisms, resulting in a low probability of treatment response.
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Affiliation(s)
- M Klier
- Institute of Pathology, Helmholtz Center Munich-German Research Center for Environmental Health, Neuherberg, Germany
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Darwiche N, El-Banna S, Gali-Muhtasib H. Cell cycle modulatory and apoptotic effects of plant-derived anticancer drugs in clinical use or development. Expert Opin Drug Discov 2007; 2:361-79. [DOI: 10.1517/17460441.2.3.361] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Abstract
Abstract
Mantle cell lymphoma (MCL) remains one of the more challenging sub-types of non-Hodgkin lymphoma. This entity, which is only approximately 10 years old, is characterized by response to many different chemotherapy regimens, though the duration of those responses remains often times quite short. Retreatment with second and third line combination regimens results in shorter and shorter durations of response, with the rapid emergence of a very drug-resistant phenotype. Despite these often frustrating clinical features, there is now a lot of new hope in managing patients with MCL. New insights into the molecular pathogenesis of MCL has revealed a plethora of new potential targets, while our continued efforts in novel targeted drug development has produced a host of agents that are already helping patients with this challenging disease. The use of proteasome inhibitors, for example, represents one example of a new strategy that has offered new hope for patients, and new opportunities for the physician treating this disease. In this review, we will put this biology into perspective, and describe how new revelations in MCL pathogenesis are leading to the identification of many exciting new drugs with promising activity.
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Underlying mechanisms of hematologic malignancies revealed by gene expression profiling. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.ddmec.2006.11.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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