201
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Feng Q, Zhang Q, He H, Zhang L, Chang B, Yu L, Zhang X. A Facile Total Synthesis of Kilogram-Scale Production of SKLB1039: A Novel and Selective Hexahydroisoquinolin-Containing EZH2 Inhibitor. Curr Org Synth 2022; 19:583-590. [PMID: 34994315 DOI: 10.2174/1570179419666220107161257] [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: 09/16/2021] [Revised: 12/03/2021] [Accepted: 12/17/2021] [Indexed: 02/08/2023]
Abstract
BACKGROUND SKLB1039 is a potent, highly selective, and orally bioavailable EZH2 inhibitor, which significantly inhibited breast tumor growth and metastasis, in pre-clinical studies. In a previously reported synthesis of SKLB1039, the yields of several steps were low which led to an overall yield of less than 10%. In addition, flash chromatography was required for the purification of several intermediates using this route. OBJECTIVE To optimize the synthesis and establish an efficient commercial-scale method for the production of SKLB1039. METHODS The reaction time, solvent, reactant ratio, temperature, and mode of addition of reactants in the reductive amination, hydrolysis, hexahydroisoquinoline formation, hydrogenolysis, condensation and Suzuki cross-coupling reactions were optimized. RESULTS A chromatography-free seven-step process starting from a commercially available material was developed that afforded SKLB1039 in 36% overall yield with > 99% purity. CONCLUSION A cost-effective, high-yielding, and convergent kilo-scale synthesis for the EZH2 inhibitor SKLB1039 was developed. The operation was simple, and the pure product was easily obtained without column chromatography. This method will be economical and convenient for the subsequent industrial scale-up production of SKLB1039, which will be conducive for this promising EZH2 inhibitor to enter clinical studies of its anti-tumor effects.
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Affiliation(s)
- Qiang Feng
- Colledge of Chemistry and Life Science,Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules,Chengdu Normal University,Chengdu, 611130,China
| | - Qiangsheng Zhang
- State Key Laboratory of Biotherapy/Collaborative Innovation Centor of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, 610041, China
| | - Hualong He
- State Key Laboratory of Biotherapy/Collaborative Innovation Centor of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, 610041, China
| | - Lidan Zhang
- State Key Laboratory of Biotherapy/Collaborative Innovation Centor of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, 610041, China
| | - Bo Chang
- Colledge of Chemistry and Life Science,Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules,Chengdu Normal University,Chengdu, 611130,China
| | - Luoting Yu
- State Key Laboratory of Biotherapy/Collaborative Innovation Centor of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, 610041, China
| | - Xiaoling Zhang
- Colledge of Chemistry and Life Science,Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules,Chengdu Normal University,Chengdu, 611130,China
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202
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Zhang Q, Chen X, Hu X, Duan X, Wan G, Li L, Feng Q, Zhang Y, Wang N, Yu L. Covalent inhibitors of EZH2: Design, synthesis and evaluation. Biomed Pharmacother 2022; 147:112617. [PMID: 34998031 DOI: 10.1016/j.biopha.2022.112617] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 12/31/2021] [Accepted: 01/02/2022] [Indexed: 02/05/2023] Open
Abstract
The histone lysine methyltransferase EZH2 has been implicated as a key component in cancer development. Up to date, there are only a few EZH2 covalent inhibitors. In this study, a new series of 3-acrylamido-2-methyl-N-((2-oxo-1,2-dihydropyridin-3-yl) methyl) benzamide derivatives were designed, synthesized, and demonstrated to act as EZH2 covalent inhibitors, among which SKLB-03176 was the most potent compound. SAM competition experiments, mass spectrometry, and washing-out assays proved that SKLB-03176 could covalently bind to the SAM pocket of EZH2. Remarkably, SKLB-03176 exhibited weak activity against other targets, such as 5 histone methyltransferases and more than 30 kinases. Besides, it could inhibit the activity of a variety of EZH2 mutants and significantly inhibit the expression of H3K27Me3 in cells. Furthermore, SKLB-03176 showed no cytotoxicity to normal cells. Our data suggested that SKLB-03176 could be used as a promising lead compound for the development of new EZH2 covalent inhibitors and a valuable chemical tool to study the biological functions of EZH2 or PRC2.
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Affiliation(s)
- Qiangsheng Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, 17#3rd Section, Ren Min South Road, Chengdu 610041, PR China
| | - Xinyi Chen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, 17#3rd Section, Ren Min South Road, Chengdu 610041, PR China
| | - Xi Hu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, 17#3rd Section, Ren Min South Road, Chengdu 610041, PR China
| | - Xianjie Duan
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, 17#3rd Section, Ren Min South Road, Chengdu 610041, PR China
| | - Guoquan Wan
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, 17#3rd Section, Ren Min South Road, Chengdu 610041, PR China
| | - Lu Li
- Clinical Trial Center, National Medical Products Administration Key Laboratory for Clinical Research and Evaluation of Innovative Drugs, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Qiang Feng
- College of Chemistry and Life Science, Chengdu Normal University, Chengdu 611130, PR China
| | - Yiqian Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, 17#3rd Section, Ren Min South Road, Chengdu 610041, PR China
| | - Ningyu Wang
- School of Life Science and Engineering, Southwest JiaoTong University, Chengdu, Sichuan 611756, PR China.
| | - Luoting Yu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, and Collaborative Innovation Center of Biotherapy, Sichuan University, 17#3rd Section, Ren Min South Road, Chengdu 610041, PR China.
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203
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Chen S, Liu Y, Zhang Y, Wierbowski SD, Lipkin SM, Wei X, Yu H. A full-proteome, interaction-specific characterization of mutational hotspots across human cancers. Genome Res 2022; 32:135-149. [PMID: 34963661 PMCID: PMC8744679 DOI: 10.1101/gr.275437.121] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 11/22/2021] [Indexed: 11/24/2022]
Abstract
Rapid accumulation of cancer genomic data has led to the identification of an increasing number of mutational hotspots with uncharacterized significance. Here we present a biologically informed computational framework that characterizes the functional relevance of all 1107 published mutational hotspots identified in approximately 25,000 tumor samples across 41 cancer types in the context of a human 3D interactome network, in which the interface of each interaction is mapped at residue resolution. Hotspots reside in network hub proteins and are enriched on protein interaction interfaces, suggesting that alteration of specific protein-protein interactions is critical for the oncogenicity of many hotspot mutations. Our framework enables, for the first time, systematic identification of specific protein interactions affected by hotspot mutations at the full proteome scale. Furthermore, by constructing a hotspot-affected network that connects all hotspot-affected interactions throughout the whole-human interactome, we uncover genome-wide relationships among hotspots and implicate novel cancer proteins that do not harbor hotspot mutations themselves. Moreover, applying our network-based framework to specific cancer types identifies clinically significant hotspots that can be used for prognosis and therapy targets. Overall, we show that our framework bridges the gap between the statistical significance of mutational hotspots and their biological and clinical significance in human cancers.
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Affiliation(s)
- Siwei Chen
- Department of Computational Biology, Cornell University, Ithaca, New York 14853, USA
- Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, New York 14853, USA
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York 14853, USA
| | - Yuan Liu
- Department of Computational Biology, Cornell University, Ithaca, New York 14853, USA
- Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, New York 14853, USA
| | - Yingying Zhang
- Department of Computational Biology, Cornell University, Ithaca, New York 14853, USA
- Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, New York 14853, USA
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York 14853, USA
| | - Shayne D Wierbowski
- Department of Computational Biology, Cornell University, Ithaca, New York 14853, USA
- Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, New York 14853, USA
| | - Steven M Lipkin
- Department of Medicine, Weill Cornell Medicine, New York, New York 10021, USA
| | - Xiaomu Wei
- Department of Computational Biology, Cornell University, Ithaca, New York 14853, USA
- Department of Medicine, Weill Cornell Medicine, New York, New York 10021, USA
| | - Haiyuan Yu
- Department of Computational Biology, Cornell University, Ithaca, New York 14853, USA
- Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, New York 14853, USA
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204
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Fernández-Serrano M, Winkler R, Santos JC, Le Pannérer MM, Buschbeck M, Roué G. Histone Modifications and Their Targeting in Lymphoid Malignancies. Int J Mol Sci 2021; 23:253. [PMID: 35008680 PMCID: PMC8745418 DOI: 10.3390/ijms23010253] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/22/2021] [Accepted: 12/24/2021] [Indexed: 12/12/2022] Open
Abstract
In a wide range of lymphoid neoplasms, the process of malignant transformation is associated with somatic mutations in B cells that affect the epigenetic machinery. Consequential alterations in histone modifications contribute to disease-specific changes in the transcriptional program. Affected genes commonly play important roles in cell cycle regulation, apoptosis-inducing signal transduction, and DNA damage response, thus facilitating the emergence of malignant traits that impair immune surveillance and favor the emergence of different B-cell lymphoma subtypes. In the last two decades, the field has made a major effort to develop therapies that target these epigenetic alterations. In this review, we discuss which epigenetic alterations occur in B-cell non-Hodgkin lymphoma. Furthermore, we aim to present in a close to comprehensive manner the current state-of-the-art in the preclinical and clinical development of epigenetic drugs. We focus on therapeutic strategies interfering with histone methylation and acetylation as these are most advanced in being deployed from the bench-to-bedside and have the greatest potential to improve the prognosis of lymphoma patients.
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Affiliation(s)
- Miranda Fernández-Serrano
- Lymphoma Translational Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Spain; (M.F.-S.); (J.C.S.)
- Department of Biochemistry and Molecular Biology, Autonomous University of Barcelona, 08014 Barcelona, Spain
| | - René Winkler
- Chromatin, Metabolism and Cell Fate Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Spain; (R.W.); (M.-M.L.P.)
| | - Juliana C. Santos
- Lymphoma Translational Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Spain; (M.F.-S.); (J.C.S.)
| | - Marguerite-Marie Le Pannérer
- Chromatin, Metabolism and Cell Fate Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Spain; (R.W.); (M.-M.L.P.)
| | - Marcus Buschbeck
- Chromatin, Metabolism and Cell Fate Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Spain; (R.W.); (M.-M.L.P.)
- Program of Personalized and Predictive Medicine of Cancer, Germans Trias i Pujol Research Institute (IGTP), 08916 Badalona, Spain
| | - Gaël Roué
- Lymphoma Translational Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Spain; (M.F.-S.); (J.C.S.)
- Department of Biochemistry and Molecular Biology, Autonomous University of Barcelona, 08014 Barcelona, Spain
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205
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Zhong M, Tan J, Pan G, Jiang Y, Zhou H, Lai Q, Chen Q, Fan L, Deng M, Xu B, Zha J. Preclinical Evaluation of the HDAC Inhibitor Chidamide in Transformed Follicular Lymphoma. Front Oncol 2021; 11:780118. [PMID: 34926293 PMCID: PMC8677934 DOI: 10.3389/fonc.2021.780118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 11/09/2021] [Indexed: 01/02/2023] Open
Abstract
The key factors leading to transformed follicular lymphoma (t-FL) include the aberrations of epigenetic modifiers as early and driving events, especially mutations in the gene encoding for histone acetyltransferase. Therefore, reversal of this phenomenon by histone deacetylase (HDAC) inhibitors is essential for the development of new treatment strategies in t-FL. Several t-FL cell lines were treated with various doses of chidamide and subjected to cell proliferation, apoptosis and cell cycle analyses with CCK-8 assay, Annexin V/PI assay and flow cytometry, respectively. Chidamide dose-dependently inhibited cell proliferation, caused G0/G1 cycle arrest and triggered apoptosis in t-FL cells. In addition, the effects of chidamide on tumor growth were evaluated in vivo in xenograft models. RNA-seq analysis revealed gene expression alterations involving the PI3K-AKT signaling pathway might account for the mechanism underlying the antitumor activity of chidamide as a single agent in t-FL. These findings provide a basis for further clinical exploration of chidamide as a promising treatment for FL.
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Affiliation(s)
- Mengya Zhong
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Jinshui Tan
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Guangchao Pan
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Yuelong Jiang
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Hui Zhou
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Qian Lai
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Qinwei Chen
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Liyuan Fan
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Manman Deng
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Bing Xu
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
| | - Jie Zha
- Department of Hematology, The First Affiliated Hospital of Xiamen University and Institute of Hematology, School of Medicine, Xiamen University, Xiamen, China.,Department of Hematology, Key Laboratory of Xiamen for Diagnosis and Treatment of Hematological Malignancy, Xiamen, China
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206
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Gao F, Tian L, Shi H, Zheng P, Wang J, Dong F, Hu K, Ke X. Genetic Landscape of Relapsed and Refractory Diffuse Large B-Cell Lymphoma: A Systemic Review and Association Analysis With Next-Generation Sequencing. Front Genet 2021; 12:677650. [PMID: 34925435 PMCID: PMC8675234 DOI: 10.3389/fgene.2021.677650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 11/10/2021] [Indexed: 11/13/2022] Open
Abstract
In our research, we screened 1,495 documents, compiled the whole-exome sequencing data of several studies, formed a data set including 92 observations of RRDLBCL (Relapsed and refractory diffuse large B-cell lymphoma), and performed association analysis on the high-frequency mutations among them. The most common mutations in the data set include TTN, KMT2D, TP53, IGLL5, CREBBP, BCL2, MYD88, and SOCS1 etc. Among these, CREBBP, KMT2D, and BCL2 have a strong association with each other, and SOCS1 has a strong association with genes such as STAT6, ACTB, CIITA, ITPKB, and GNA13. TP53 lacks significant associations with most genes. Through SOM clustering, expression-level analysis and protein interaction analysis of common gene mutations, we believe that RRDLBCL can be divided into five main types. We tested the function of the model and described the clinical characteristics of each subtype through a targeted sequencing RRDLBCL cohort of 96 patients. The classification is stated as follows: 1) JAK-STAT-related type: including STAT6, SOCS1, CIITA, etc. The genetic lineage is similar to PMBL and cHL. Retrospective analysis suggests that this subtype responds poorly to induction therapy (R-CHOP, p < 0.05). 2) BCL-CREBBP type: Epigenetic mutations such as KMT2D and CREBBP are more common in this type, and are often accompanied by BCL2 and EZH2 mutations. 3) MCD type: including MYD88 and CD79B, PIM1 is more common in this subtype. 4) TP53 mutation: TP53 mutant patients, which suggests the worst prognosis (p < 0.05) and worst response to CART treatment. 5) Undefined type (Sparse item type): Major Genetic Change Lacking Type, which has a better prognosis and better response to CART treatment. We also reviewed the literature from recent years concerning the previously mentioned common gene mutations.
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Affiliation(s)
- Fan Gao
- Department of Hematology, Peking University Third Hospital, Beijing, China
| | - Lei Tian
- Department of Hematology, Peking University Third Hospital, Beijing, China
| | - Hui Shi
- Department of Adult Lymphoma, Beijing Boren Hospital, Beijing, China
| | - Peihao Zheng
- Department of Adult Lymphoma, Beijing Boren Hospital, Beijing, China
| | - Jing Wang
- Department of Hematology, Peking University Third Hospital, Beijing, China
| | - Fei Dong
- Department of Hematology, Peking University Third Hospital, Beijing, China
| | - Kai Hu
- Department of Adult Lymphoma, Beijing Boren Hospital, Beijing, China
| | - Xiaoyan Ke
- Department of Hematology, Peking University Third Hospital, Beijing, China
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207
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Soshnev AA, Allis CD, Cesarman E, Melnick AM. Histone H1 Mutations in Lymphoma: A Link(er) between Chromatin Organization, Developmental Reprogramming, and Cancer. Cancer Res 2021; 81:6061-6070. [PMID: 34580064 PMCID: PMC8678342 DOI: 10.1158/0008-5472.can-21-2619] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/10/2021] [Accepted: 09/23/2021] [Indexed: 11/16/2022]
Abstract
Aberrant cell fate decisions due to transcriptional misregulation are central to malignant transformation. Histones are the major constituents of chromatin, and mutations in histone-encoding genes are increasingly recognized as drivers of oncogenic transformation. Mutations in linker histone H1 genes were recently identified as drivers of peripheral lymphoid malignancy. Loss of H1 in germinal center B cells results in widespread chromatin decompaction, redistribution of core histone modifications, and reactivation of stem cell-specific transcriptional programs. This review explores how linker histones and mutations therein regulate chromatin structure, highlighting reciprocal relationships between epigenetic circuits, and discusses the emerging role of aberrant three-dimensional chromatin architecture in malignancy.
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Affiliation(s)
- Alexey A Soshnev
- Laboratory of Chromatin Biology and Epigenetics, The Rockefeller University, New York, New York.
| | - C David Allis
- Laboratory of Chromatin Biology and Epigenetics, The Rockefeller University, New York, New York
| | - Ethel Cesarman
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, New York
| | - Ari M Melnick
- Division of Hematology & Medical Oncology, Sanford I. Weill Department of Medicine, Weill Cornell Medicine, New York, New York.
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208
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Mondello P, Ansell SM. Tazemetostat: a treatment option for relapsed/refractory follicular lymphoma. Expert Opin Pharmacother 2021; 23:295-301. [PMID: 34904909 DOI: 10.1080/14656566.2021.2014815] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Follicular lymphoma (FL) is the second most common form of B cell lymphoma and generally presents as an indolent and relatively slow-growing tumor. However, most FLs are incurable with a shortening of subsequent responses. Therefore, novel and more effective treatments are desperately needed. Tazemetostat is a first-in-class, selective, oral inhibitor of EZH2, a lysine methyltransferase that is mutated in about 25% of FL. Tazemetostat has been recently approved for relapsed/refractory FL after two or more lines of therapy in the presence of an EZH2 mutation or independent of an EZH2 mutation in the absence of other options. AREAS COVERED Here, the authors provide a review focusing on the molecular mechanisms of EZH2, clinical development of tazemetostat and other EZH2 inhibitors (EZH2i), as single-agent therapy and in combinatorial regimens. Finally, they provide a futuristic look at therapeutic approaches for this disease. EXPERT OPINION Tazemetostat monotherapy showed clinically meaningful and durable responses with a favorable toxicity profile, especially in EZH2 mutant lymphoma. Future studies should explore mechanism-based combinatorial regimens to maximize and prolong the anti-lymphoma effect.
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Affiliation(s)
- Patrizia Mondello
- Division of Hematology and Internal Medicine, Mayo Clinic, Rochester, MN, USA
| | - Stephen M Ansell
- Division of Hematology and Internal Medicine, Mayo Clinic, Rochester, MN, USA
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209
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Wilson WH, Wright GW, Huang DW, Hodkinson B, Balasubramanian S, Fan Y, Vermeulen J, Shreeve M, Staudt LM. Effect of ibrutinib with R-CHOP chemotherapy in genetic subtypes of DLBCL. Cancer Cell 2021; 39:1643-1653.e3. [PMID: 34739844 PMCID: PMC8722194 DOI: 10.1016/j.ccell.2021.10.006] [Citation(s) in RCA: 136] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/31/2021] [Accepted: 10/11/2021] [Indexed: 12/15/2022]
Abstract
In diffuse large B cell lymphoma (DLBCL), tumors belonging to the ABC but not GCB gene expression subgroup rely upon chronic active B cell receptor signaling for viability, a dependency that is targetable by ibrutinib. A phase III trial ("Phoenix;" ClinicalTrials.gov: NCT01855750) showed a survival benefit of ibrutinib addition to R-CHOP chemotherapy in younger patients with non-GCB DLBCL, but the molecular basis for this benefit was unclear. Analysis of biopsies from Phoenix trial patients revealed three previously characterized genetic subtypes of DLBCL: MCD, BN2, and N1. The 3-year event-free survival of younger patients (age ≤60 years) treated with ibrutinib plus R-CHOP was 100% in the MCD and N1 subtypes while the survival of patients with these subtypes treated with R-CHOP alone was significantly inferior (42.9% and 50%, respectively). This work provides a mechanistic understanding of the benefit of ibrutinib addition to chemotherapy, supporting its use in younger patients with non-GCB DLBCL.
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Affiliation(s)
- Wyndham H Wilson
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - George W Wright
- Biometric Research Branch, Division of Cancer Diagnosis and Treatment, National Cancer Institute, National Institutes of Health, Bethesda, MD 20850, USA
| | - Da Wei Huang
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Brendan Hodkinson
- Johnson & Johnson, 1 Johnson & Johnson Plaza, New Brunswick, NJ 08933, USA
| | | | - Yue Fan
- Johnson & Johnson, 1 Johnson & Johnson Plaza, New Brunswick, NJ 08933, USA
| | - Jessica Vermeulen
- Johnson & Johnson, 1 Johnson & Johnson Plaza, New Brunswick, NJ 08933, USA
| | - Martin Shreeve
- Johnson & Johnson, 1 Johnson & Johnson Plaza, New Brunswick, NJ 08933, USA
| | - Louis M Staudt
- Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA; Center for Cancer Genomics, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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210
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Molecular interactions of IRF4 in B cell development and malignancies. Biophys Rev 2021; 13:1219-1227. [DOI: 10.1007/s12551-021-00825-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 07/29/2021] [Indexed: 10/20/2022] Open
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211
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Rai S, Inoue H, Sakai K, Hanamoto H, Matsuda M, Maeda Y, Haeno T, Watatani Y, Kumode T, Serizawa K, Taniguchi Y, Hirase C, Espinoza JL, Morita Y, Tanaka H, Ashida T, Tatsumi Y, Nishio K, Matsumura I. Decreased expression of T-cell-associated immune markers predicts poor prognosis in patients with follicular lymphoma. Cancer Sci 2021; 113:660-673. [PMID: 34837284 PMCID: PMC8819350 DOI: 10.1111/cas.15224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 10/24/2021] [Accepted: 11/20/2021] [Indexed: 12/14/2022] Open
Abstract
We previously examined the utility of rituximab-bendamustine (RB) in patients with follicular lymphoma (FL) exhibiting less than optimal responses to 2 cycles of the R-CHOP chemotherapy regimen. The aim of this study was to identify molecular biomarkers that can predict prognosis in RB-treated patients in the context of the prospective cohort. We first analyzed the mutational status of 410 genes in diagnostic tumor specimens by target capture and Sanger sequencing. CREBBP, KMT2D, MEF2B, BCL2, EZH2, and CARD11 were recurrently mutated as reported before, however none was predictive for progression-free survival (PFS) in the RB-treated patients (n = 34). A gene expression analysis by nCounter including 800 genes associated with carcinogenesis and/or the immune response showed that expression levels of CD8+ T-cell markers and half of the genes regulating Th1 and Th2 responses were significantly lower in progression of disease within the 24-mo (POD24) group (n = 8) than in the no POD24 group (n = 31). Collectively, we selected 10 genes (TBX21, CXCR3, CCR4, CD8A, CD8B, GZMM, FLT3LG, CD3E, EOMES, GZMK), and generated an immune infiltration score (IIS) for predicting PFS using principal component analysis, which dichotomized the RB-treated patients into immune IIShigh (n = 19) and IISlow (n = 20) groups. The 3-y PFS rate was significantly lower in the IISlow group than in the IIShigh group (50.0% [95% CI: 27.1-69.2%] vs. 84.2% [95% CI: 58.7-94.6%], P = .0237). Furthermore, the IIS was correlates with absolute lymphocyte counts at diagnosis (r = 0.460, P = .00355). These results suggest that the T-cell-associated immune markers could be useful to predict prognosis in RB-treated FL patients. (UMIN:000 013 795, jRCT:051 180 181).
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Affiliation(s)
- Shinya Rai
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Hiroaki Inoue
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Kazuko Sakai
- Department of Genome Biology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Hitoshi Hanamoto
- Department of Hematology, Faculty of Medicine, Nara Hospital Kindai University, Ikoma, Japan
| | | | - Yasuhiro Maeda
- Department of Hematology, Minami Sakai Hospital, Sakai, Japan
| | - Takahiro Haeno
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Yosaku Watatani
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Takahiro Kumode
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Kentaro Serizawa
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Yasuhiro Taniguchi
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Chikara Hirase
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - J Luis Espinoza
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Yasuyoshi Morita
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Hirokazu Tanaka
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Takashi Ashida
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Yoichi Tatsumi
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Kazuto Nishio
- Department of Genome Biology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
| | - Itaru Matsumura
- Department of Hematology and Rheumatology, Faculty of Medicine, Kindai University, Osaka-sayama, Japan
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212
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Mazzu YZ, Liao Y, Nandakumar S, Sjöström M, Jehane LE, Ghale R, Govindarajan B, Gerke TA, Lee GSM, Luo JH, Chinni SR, Mucci LA, Feng FY, Kantoff PW. Dynamic expression of SNAI2 in prostate cancer predicts tumor progression and drug sensitivity. Mol Oncol 2021; 16:2451-2469. [PMID: 34792282 PMCID: PMC9251866 DOI: 10.1002/1878-0261.13140] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/05/2021] [Accepted: 11/16/2021] [Indexed: 11/13/2022] Open
Abstract
Prostate cancer is a highly heterogeneous disease, understanding the crosstalk between complex genomic and epigenomic alterations will aid in developing targeted therapeutics. We demonstrate that, even though snail family transcriptional repressor 2 (SNAI2) is frequently amplified in prostate cancer, it is epigenetically silenced in this disease, with dynamic changes in SNAI2 levels showing distinct clinical relevance. Integrative clinical data from 18 prostate cancer cohorts and experimental evidence showed that gene fusion between transmembrane serine protease 2 (TMPRSS2) and ETS transcription factor ERG (ERG) (TMPRSS2–ERG fusion) is involved in the silencing of SNAI2. We created a silencer score to evaluate epigenetic repression of SNAI2, which can be reversed by treatment with DNA methyltransferase inhibitors and histone deacetylase inhibitors. Silencing of SNAI2 facilitated tumor cell proliferation and luminal differentiation. Furthermore, SNAI2 has a major influence on the tumor microenvironment by reactivating tumor stroma and creating an immunosuppressive microenvironment in prostate cancer. Importantly, SNAI2 expression levels in part determine sensitivity to the cancer drugs dasatinib and panobinostat. For the first time, we defined the distinct clinical relevance of SNAI2 expression at different disease stages. We elucidated how epigenetic silencing of SNAI2 controls the dynamic changes of SNAI2 expression that are essential for tumor initiation and progression and discovered that restoring SNAI2 expression by treatment with panobinostat enhances dasatinib sensitivity, indicating a new therapeutic strategy for prostate cancer.
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Affiliation(s)
- Ying Z Mazzu
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - YuRou Liao
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Subhiksha Nandakumar
- Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Martin Sjöström
- Department of Radiation Oncology, University of California San Francisco, San Francisco, CA, USA.,Division of Hematology and Oncology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Lina E Jehane
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Romina Ghale
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | | | - Travis A Gerke
- Prostate Cancer Clinical Trials Consortium, New York, NY, USA
| | - Gwo-Shu Mary Lee
- Department of Medicine, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Jian-Hua Luo
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | | | - Lorelei A Mucci
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Felix Y Feng
- Department of Radiation Oncology, University of California San Francisco, San Francisco, CA, USA.,Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA.,Division of Hematology and Oncology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA.,Department of Urology, University of California San Francisco, San Francisco, CA, USA
| | - Philip W Kantoff
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA
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213
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Kim HG, Kim MS, Lee YS, Lee EH, Kim DC, Lee SH, Kim YZ. Hypo-trimethylation of Histone H3 Lysine 4 and Hyper-tri/dimethylation of Histone H3 Lysine 27 as Epigenetic Markers of Poor Prognosis in Patients with Primary Central Nervous System Lymphoma. Cancer Res Treat 2021; 54:690-708. [PMID: 34793663 PMCID: PMC9296929 DOI: 10.4143/crt.2021.1121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 11/10/2021] [Indexed: 11/21/2022] Open
Abstract
Purpose This study aimed to investigate the methylation status of major histone modification sites in primary central nervous system lymphoma (PCNSL) samples and examine their prognostic roles in patients with PCNSL. Materials and Method Between 2007 and 2020, 87 patients were histopathologically diagnosed with PCNSL. We performed immunohistochemical staining of the formalin-fixed paraffin-embedded samples of PCNSL for major histone modification sites, such as H3K4, H3K9, H3K27, H3K14, and H3K36. After detection of meaningful methylation sites, we examined histone modification enzymes that induce methylation or demethylation at each site using immunohistochemical staining. The meaningful immunoreactivity was validated by western blotting using fresh tissue of PCNSL. Results More frequent recurrences were found in hypomethylation of H3K4me3 (p=0.004) and hypermethylation of H3K27me2 (p<0.001) and H3K27me3 (p=0.002). These factors were also statistically related to short PFS and OS in the univariate and multivariate analyses. Next, histone modification enzymes inducing the demethylation of H3K4 (lysine-specific demethylase (LSD)-1/2 and Jumonji AT-rich interactive domain 1A (JARID1A-D)) and methylation of H3K27 (enhancer of zeste homolog (EZH)-1/2) were immunohistochemically stained. Among them, the immunoreactivity of JARID1A inversely associated with the methylation status of H3K4me3 (R2=-1.431), and immunoreactivity of EZH2 was directly associated with the methylation status of H3K27me2 (R2=0.667) and H3K27me3 (R2=0.604). These results were validated by western blotting in fresh PCNSL samples. Conclusion Our study suggests that hypomethylation of H3K4me3 and hypermethylation of H3K27me2 and H3K27me3 could be associated with poor outcomes in patients with PCNSL and that these relationships are modified by JARID1A and EZH2.
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Affiliation(s)
- Hoon Gi Kim
- Division of Neuro Oncology and Department of Neurosurgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Minseok S Kim
- Department of New Biology, Well Aging Research Center, College of Transdisciplinary Studies, and Translational Responsive Medicine Center, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea
| | - Young Sam Lee
- Department of New Biology, Well Aging Research Center, Division of Biotechnology, and Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea
| | - Eun Hee Lee
- Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - Dae Cheol Kim
- Department of Pathology, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Korea
| | - Sung-Hun Lee
- Cancer Research Institute, Clinomics Inc., Suwon, Korea
| | - Young Zoon Kim
- Division of Neuro Oncology and Department of Neurosurgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
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214
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Liu Y, Gokhale S, Jung J, Zhu S, Luo C, Saha D, Guo JY, Zhang H, Kyin S, Zong WX, White E, Xie P. Mitochondrial Fission Factor Is a Novel Interacting Protein of the Critical B Cell Survival Regulator TRAF3 in B Lymphocytes. Front Immunol 2021; 12:670338. [PMID: 34745083 PMCID: PMC8564014 DOI: 10.3389/fimmu.2021.670338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 10/04/2021] [Indexed: 12/30/2022] Open
Abstract
Proteins controlling mitochondrial fission have been recognized as essential regulators of mitochondrial functions, mitochondrial quality control and cell apoptosis. In the present study, we identified the critical B cell survival regulator TRAF3 as a novel binding partner of the key mitochondrial fission factor, MFF, in B lymphocytes. Elicited by our unexpected finding that the majority of cytoplasmic TRAF3 proteins were localized at the mitochondria in resting splenic B cells after ex vivo culture for 2 days, we found that TRAF3 specifically interacted with MFF as demonstrated by co-immunoprecipitation and GST pull-down assays. We further found that in the absence of stimulation, increased protein levels of mitochondrial TRAF3 were associated with altered mitochondrial morphology, decreased mitochondrial respiration, increased mitochondrial ROS production and membrane permeabilization, which eventually culminated in mitochondria-dependent apoptosis in resting B cells. Loss of TRAF3 had the opposite effects on the morphology and function of mitochondria as well as mitochondria-dependent apoptosis in resting B cells. Interestingly, co-expression of TRAF3 and MFF resulted in decreased phosphorylation and ubiquitination of MFF as well as decreased ubiquitination of TRAF3. Moreover, lentivirus-mediated overexpression of MFF restored mitochondria-dependent apoptosis in TRAF3-deficient malignant B cells. Taken together, our findings provide novel insights into the apoptosis-inducing mechanisms of TRAF3 in B cells: as a result of survival factor deprivation or under other types of stress, TRAF3 is mobilized to the mitochondria through its interaction with MFF, where it triggers mitochondria-dependent apoptosis. This new role of TRAF3 in controlling mitochondrial homeostasis might have key implications in TRAF3-mediated regulation of B cell transformation in different cellular contexts. Our findings also suggest that mitochondrial fission is an actionable therapeutic target in human B cell malignancies, including those with TRAF3 deletion or relevant mutations.
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Affiliation(s)
- Yingying Liu
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States
| | - Samantha Gokhale
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States.,Graduate Program in Cellular and Molecular Pharmacology, Rutgers University, Piscataway, NJ, United States
| | - Jaeyong Jung
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States.,Graduate Program in Cellular and Molecular Pharmacology, Rutgers University, Piscataway, NJ, United States
| | - Sining Zhu
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States.,Graduate Program in Cellular and Molecular Pharmacology, Rutgers University, Piscataway, NJ, United States
| | - Chang Luo
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States
| | - Debanjan Saha
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States
| | - Jessie Yanxiang Guo
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States.,Department of Medicine, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, United States.,Department of Chemical Biology, Rutgers Ernest Mario School of Pharmacy, Piscataway, NJ, United States
| | - Huaye Zhang
- Department of Neuroscience and Cell Biology, Rutgers Robert Wood Johnson Medical School, Piscataway, NJ, United States
| | - Saw Kyin
- Department of Molecular Biology, Princeton University, Princeton, NJ, United States
| | - Wei-Xing Zong
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States.,Department of Chemical Biology, Rutgers Ernest Mario School of Pharmacy, Piscataway, NJ, United States
| | - Eileen White
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States.,Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ, United States
| | - Ping Xie
- Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, United States.,Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, United States
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215
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A Germinal Center-Associated Microenvironmental Signature Reflects Malignant Phenotype and Outcome of DLBCL. Blood Adv 2021; 6:2388-2402. [PMID: 34638128 PMCID: PMC9006269 DOI: 10.1182/bloodadvances.2021004618] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 08/29/2021] [Indexed: 12/03/2022] Open
Abstract
The DLBCL microenvironment signature scoring system was established using nCounter-based profiling of GC-related microenvironmental genes. DMS scores stratified DLBCL patients with different prognosis independently of existing prognostic models.
Diffuse large B-cell lymphoma (DLBCL) is the most common B-cell malignancy, with varying prognosis after the gold standard rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP). Several prognostic models have been established by focusing primarily on characteristics of lymphoma cells themselves, including cell-of-origin (COO), genomic alterations, and gene/protein expressions. However, the prognostic impact of the lymphoma microenvironment and its association with characteristics of lymphoma cells are not fully understood. Using the nCounter-based gene expression profiling of untreated DLBCL tissues, we assess the clinical impact of lymphoma microenvironment on the clinical outcomes and pathophysiological, molecular signatures in DLBCL. The presence of normal germinal center (GC)-microenvironmental cells, including follicular T cells, macrophage/dendritic cells, and stromal cells in lymphoma tissue indicates a positive therapeutic response. Our prognostic model, based on quantitation of transcripts from distinct GC-microenvironmental cell markers, clearly identified patients with graded prognosis independently of existing prognostic models. We observed increased incidences of genomic alterations and aberrant gene expression associated with poor prognosis in DLBCL tissues lacking GC-microenvironmental cells relative to those containing these cells. These data suggest that the loss of GC-associated microenvironmental signature dictates clinical outcomes of DLBCL patients reflecting the accumulation of “unfavorable” molecular signatures.
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216
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Dlouhy I, Karube K, Enjuanes A, Salaverria I, Nadeu F, Ramis-Zaldivar JE, Valero JG, Rivas-Delgado A, Magnano L, Martin-García D, Pérez-Galán P, Clot G, Rovira J, Jares P, Balagué O, Giné E, Mozas P, Briones J, Sancho JM, Salar A, Mercadal S, Alcoceba M, Valera A, Campo E, López-Guillermo A. Revised International Prognostic Index and genetic alterations are associated with early failure to R-CHOP in patients with diffuse large B-cell lymphoma. Br J Haematol 2021; 196:589-598. [PMID: 34632572 DOI: 10.1111/bjh.17858] [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: 06/14/2021] [Revised: 08/26/2021] [Accepted: 09/12/2021] [Indexed: 11/28/2022]
Abstract
Relapsed or refractory diffuse large B-cell lymphoma (DLBCL) cases have a poor outcome. Here we analysed clinico-biological features in 373 DLBCL patients homogeneously treated with rituximab, cyclophosphamide, doxorubicin, vincristine and prednisolone (R-CHOP), in order to identify variables associated with early failure to treatment (EF), defined as primary refractoriness or relapse within 12 months from diagnosis. In addition to clinical features, mutational status of 106 genes was studied by targeted next-generation sequencing in 111 cases, copy number alterations in 87, and gene expression profile (GEP) in 39. Ninety-seven cases (26%) were identified as EF and showed significantly shorter overall survival (OS). Patients with B symptoms, advanced stage, high levels of serum lactate dehydrogenase (LDH) or β2-microglobulin, low lymphocyte/monocyte ratio and higher Revised International Prognostic Index (R-IPI) scores, as well as those with BCL2 rearrangements more frequently showed EF, with R-IPI being the most important in logistic regression. Mutations in NOTCH2, gains in 5p15·33 (TERT), 12q13 (CDK2), 12q14·1 (CDK4) and 12q15 (MDM2) showed predictive importance for EF independently from R-IPI. GEP studies showed that EF cases were significantly enriched in sets related to cell cycle regulation and inflammatory response, while cases in response showed over-representation of gene sets related to extra-cellular matrix and tumour microenvironment.
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Affiliation(s)
- Ivan Dlouhy
- Department of Hematology, Hospital Clínic, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain
| | - Kennosuke Karube
- Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Cell Biology & Pathology Department, University of the Ryukyus Graduate School of Medicine, Okinawa, Japan
| | - Anna Enjuanes
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Itziar Salaverria
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Ferran Nadeu
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Juan Enric Ramis-Zaldivar
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Juan G Valero
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Alfredo Rivas-Delgado
- Department of Hematology, Hospital Clínic, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain
| | - Laura Magnano
- Department of Hematology, Hospital Clínic, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain
| | - David Martin-García
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Patricia Pérez-Galán
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Guillem Clot
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Jordina Rovira
- Department of Hematology, Hospital Clínic, Barcelona, Spain
| | - Pedro Jares
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Olga Balagué
- Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Eva Giné
- Department of Hematology, Hospital Clínic, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain
| | - Pablo Mozas
- Department of Hematology, Hospital Clínic, Barcelona, Spain
| | | | | | | | | | - Miguel Alcoceba
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Hospital Clínico Universitario, Salamanca, Spain
| | - Alexandra Valera
- Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Elías Campo
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,Institut d`Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,University of Barcelona, Barcelona, Spain
| | - Armando López-Guillermo
- Department of Hematology, Hospital Clínic, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Tumores Hematológicos, Madrid, Spain.,University of Barcelona, Barcelona, Spain
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217
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Kalushkova A, Nylund P, Párraga AA, Lennartsson A, Jernberg-Wiklund H. One Omics Approach Does Not Rule Them All: The Metabolome and the Epigenome Join Forces in Haematological Malignancies. EPIGENOMES 2021; 5:epigenomes5040022. [PMID: 34968247 PMCID: PMC8715477 DOI: 10.3390/epigenomes5040022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/17/2021] [Accepted: 09/26/2021] [Indexed: 02/01/2023] Open
Abstract
Aberrant DNA methylation, dysregulation of chromatin-modifying enzymes, and microRNAs (miRNAs) play a crucial role in haematological malignancies. These epimutations, with an impact on chromatin accessibility and transcriptional output, are often associated with genomic instability and the emergence of drug resistance, disease progression, and poor survival. In order to exert their functions, epigenetic enzymes utilize cellular metabolites as co-factors and are highly dependent on their availability. By affecting the expression of metabolic enzymes, epigenetic modifiers may aid the generation of metabolite signatures that could be utilized as targets and biomarkers in cancer. This interdependency remains often neglected and poorly represented in studies, despite well-established methods to study the cellular metabolome. This review critically summarizes the current knowledge in the field to provide an integral picture of the interplay between epigenomic alterations and the cellular metabolome in haematological malignancies. Our recent findings defining a distinct metabolic signature upon response to enhancer of zeste homolog 2 (EZH2) inhibition in multiple myeloma (MM) highlight how a shift of preferred metabolic pathways may potentiate novel treatments. The suggested link between the epigenome and the metabolome in haematopoietic tumours holds promise for the use of metabolic signatures as possible biomarkers of response to treatment.
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Affiliation(s)
- Antonia Kalushkova
- Science for Life Laboratory, Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, 75185 Uppsala, Sweden; (P.N.); (A.A.P.); (H.J.-W.)
- Correspondence:
| | - Patrick Nylund
- Science for Life Laboratory, Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, 75185 Uppsala, Sweden; (P.N.); (A.A.P.); (H.J.-W.)
| | - Alba Atienza Párraga
- Science for Life Laboratory, Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, 75185 Uppsala, Sweden; (P.N.); (A.A.P.); (H.J.-W.)
| | - Andreas Lennartsson
- Department of Biosciences and Nutrition, NEO, Karolinska Institutet, 14157 Huddinge, Sweden;
| | - Helena Jernberg-Wiklund
- Science for Life Laboratory, Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, 75185 Uppsala, Sweden; (P.N.); (A.A.P.); (H.J.-W.)
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218
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Chen CC, Hsu CC, Chen SL, Lin PH, Chen JP, Pan YR, Huang CE, Chen YJ, Chen YY, Wu YY, Yang MH. RAS Mediates BET Inhibitor-Endued Repression of Lymphoma Migration and Prognosticates a Novel Proteomics-Based Subgroup of DLBCL through Its Negative Regulator IQGAP3. Cancers (Basel) 2021; 13:cancers13195024. [PMID: 34638508 PMCID: PMC8508075 DOI: 10.3390/cancers13195024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 09/28/2021] [Accepted: 10/04/2021] [Indexed: 12/14/2022] Open
Abstract
Simple Summary The inhibitors of BET proteins represent a promising class of therapeutic agents that target the oncogenic activity of MYC and repress DLBCL cell migration, but the mechanism of such repression remains elusive. Herein, we found that BET inhibitor JQ1 abrogated the amoeboid movement of DLBCL cells through a small GTPase-driven mechanism, including both restrained RAS signaling and MYC-mediated suppression of GTP-RhoA activity. BET inhibition drastically increased the expression of a GTPase regulatory protein, the IQ motif containing GTPase activating protein 3 (IQGAP3), in DLBCL. Proteomics-based re-stratification identified a specific subgroup of DLBCL patients whose tumors harbored an enhanced PI3K activity and had an inferior survival, whereas a lower IQGAP3 expression level further portended a very dismal outcome for those patients. The inhibitors of both BET and RAS (through attenuated PI3K signaling) activities effectively ameliorated the outspread of in vivo DLBCL tumors, indicating the potential of their synergism in the treatment of specific DLBCL subtypes. Abstract Phenotypic heterogeneity and molecular diversity make diffuse large B-cell lymphoma (DLBCL) a challenging disease. We recently illustrated that amoeboid movement plays an indispensable role in DLBCL dissemination and inadvertently identified that the inhibitor of bromodomain and extra-terminal (BET) proteins JQ1 could repress DLBCL migration. To explore further, we dissected the impacts of BET inhibition in DLBCL. We found that JQ1 abrogated amoeboid movement of DLBCL cells through both restraining RAS signaling and suppressing MYC-mediated RhoA activity. We also demonstrated that BET inhibition resulted in the upregulation of a GTPase regulatory protein, the IQ motif containing GTPase activating protein 3 (IQGAP3). IQGAP3 similarly exhibited an inhibitory effect on RAS activity in DLBCL cells. Through barcoded mRNA/protein profiling in clinical samples, we identified a specific subgroup of DLBCL tumors with enhanced phosphatidylinositol-3-kinase (PI3K) activity, which led to an inferior survival in these patients. Strikingly, a lower IQGAP3 expression level further portended those with PI3K-activated DLBCL a very dismal outcome. The inhibition of BET and PI3K signaling activity led to effective suppression of DLBCL dissemination in vivo. Our study provides an important insight into the ongoing efforts of targeting BET proteins as a therapeutic approach for DLBCL.
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Affiliation(s)
- Chih-Cheng Chen
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan; (C.-C.C.); (C.-C.H.); (C.-E.H.); (Y.-J.C.); (Y.-Y.C.); (Y.-Y.W.)
- School of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Chia-Chen Hsu
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan; (C.-C.C.); (C.-C.H.); (C.-E.H.); (Y.-J.C.); (Y.-Y.C.); (Y.-Y.W.)
| | - Sung-Lin Chen
- Institute of Biotechnology in Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan;
| | - Po-Han Lin
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan;
| | - Ju-Pei Chen
- Cancer Progression Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan;
| | - Yi-Ru Pan
- Division of General Surgery, Department of Surgery, Chang Gung Memorial Hospital, Taoyuan 33302, Taiwan;
| | - Cih-En Huang
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan; (C.-C.C.); (C.-C.H.); (C.-E.H.); (Y.-J.C.); (Y.-Y.C.); (Y.-Y.W.)
- School of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Ying-Ju Chen
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan; (C.-C.C.); (C.-C.H.); (C.-E.H.); (Y.-J.C.); (Y.-Y.C.); (Y.-Y.W.)
| | - Yi-Yang Chen
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan; (C.-C.C.); (C.-C.H.); (C.-E.H.); (Y.-J.C.); (Y.-Y.C.); (Y.-Y.W.)
| | - Yu-Ying Wu
- Division of Hematology and Oncology, Department of Medicine, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan; (C.-C.C.); (C.-C.H.); (C.-E.H.); (Y.-J.C.); (Y.-Y.C.); (Y.-Y.W.)
| | - Muh-Hwa Yang
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan;
- Cancer Progression Research Center, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan;
- Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 11217, Taiwan
- Correspondence:
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In-depth cell-free DNA sequencing reveals genomic landscape of Hodgkin’s lymphoma and facilitates ultrasensitive residual disease detection. MED 2021; 2:1171-1193.e11. [DOI: 10.1016/j.medj.2021.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 07/12/2021] [Accepted: 09/15/2021] [Indexed: 12/12/2022]
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Alsaadi M, Khan MY, Dalhat MH, Bahashwan S, Khan MU, Albar A, Almehdar H, Qadri I. Dysregulation of miRNAs in DLBCL: Causative Factor for Pathogenesis, Diagnosis and Prognosis. Diagnostics (Basel) 2021; 11:1739. [PMID: 34679437 PMCID: PMC8535125 DOI: 10.3390/diagnostics11101739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/10/2021] [Accepted: 09/17/2021] [Indexed: 11/16/2022] Open
Abstract
MicroRNA is a small non-coding RNA (sncRNA) involved in gene silencing and regulating post-transcriptional gene expression. miRNAs play an essential role in the pathogenesis of numerous diseases, including diabetes, cardiovascular diseases, viral diseases and cancer. Diffuse large B-cell lymphoma (DLBCL) is an aggressive non-Hodgkin's lymphoma (NHL), arising from different stages of B-cell differentiation whose pathogenesis involves miRNAs. Various viral and non-viral vectors are used as a delivery vehicle for introducing specific miRNA inside the cell. Adenoviruses are linear, double-stranded DNA viruses with 35 kb genome size and are extensively used in gene therapy. Meanwhile, Adeno-associated viruses accommodate up to 4.8 kb foreign genetic material and are favorable for transferring miRNA due to small size of miRNA. The genetic material is integrated into the DNA of the host cell by retroviruses so that only dividing cells are infected and stable expression of miRNA is achieved. Over the years, remarkable progress was made to understand DLBCL biology using advanced genomics and epigenomics technologies enabling oncologists to uncover multiple genetic mutations in DLBCL patients. These genetic mutations are involved in epigenetic modification, ability to escape immunosurveillance, impaired BCL6 and NF-κβ signaling pathways and blocking terminal differentiation. These pathways have since been identified and used as therapeutic targets for the treatment of DLBCL. Recently miRNAs were also identified to act either as oncogenes or tumor suppressors in DLBCL pathology by altering the expression levels of some of the known DLBCL related oncogenes. i.e., miR-155, miR-17-92 and miR-21 act as oncogenes by altering the expression levels of MYC, SHIP and FOXO1, respectively, conversely; miR-34a, mir-144 and miR-181a act as tumor suppressors by altering the expression levels of SIRT1, BCL6 and CARD11, respectively. Hundreds of miRNAs have already been identified as biomarkers in the prognosis and diagnosis of DLBCL because of their significant roles in DLBCL pathogenesis. In conclusion, miRNAs in addition to their role as biomarkers of prognosis and diagnosis could also serve as potential therapeutic targets for treating DLBCL.
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Affiliation(s)
- Mohammed Alsaadi
- Department of Biological Science, Faculty of Science, King AbdulAziz University, Jeddah 21589, Saudi Arabia; (M.A.); (M.Y.K.); (A.A.); (H.A.)
- Hematology Research Unit, King Fahad Medical Research Center, King AbdulAziz University, Jeddah 21589, Saudi Arabia;
| | - Muhammad Yasir Khan
- Department of Biological Science, Faculty of Science, King AbdulAziz University, Jeddah 21589, Saudi Arabia; (M.A.); (M.Y.K.); (A.A.); (H.A.)
- Vaccine and Immunotherapy Unit, King Fahad Medical Research Center, King AbdulAziz University, Jeddah 21589, Saudi Arabia
| | - Mahmood Hassan Dalhat
- Department of Biochemistry, Faculty of Science, King AbdulAziz University, Jeddah 21589, Saudi Arabia;
| | - Salem Bahashwan
- Hematology Research Unit, King Fahad Medical Research Center, King AbdulAziz University, Jeddah 21589, Saudi Arabia;
- Department of Hematology, Faculty of Medicine, King AbdulAziz University, Jeddah 21589, Saudi Arabia
- King AbdulAziz University Hospital, King AbdulAziz University, Jeddah 21589, Saudi Arabia
| | - Muhammad Uzair Khan
- Department of Health Sciences, City University of Science and Information Technology, Peshawar 25000, Pakistan;
| | - Abdulgader Albar
- Department of Biological Science, Faculty of Science, King AbdulAziz University, Jeddah 21589, Saudi Arabia; (M.A.); (M.Y.K.); (A.A.); (H.A.)
- Department of Microbiology, Faculty of Medicine, Jeddah University, Jeddah 23218, Saudi Arabia
| | - Hussein Almehdar
- Department of Biological Science, Faculty of Science, King AbdulAziz University, Jeddah 21589, Saudi Arabia; (M.A.); (M.Y.K.); (A.A.); (H.A.)
| | - Ishtiaq Qadri
- Department of Biological Science, Faculty of Science, King AbdulAziz University, Jeddah 21589, Saudi Arabia; (M.A.); (M.Y.K.); (A.A.); (H.A.)
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Ennishi D. The biology of the tumor microenvironment in DLBCL: Targeting the "don't eat me" signal. J Clin Exp Hematop 2021; 61:210-215. [PMID: 34511583 PMCID: PMC8808113 DOI: 10.3960/jslrt.21015] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Diffuse large B-cell lymphoma (DLBCL) is the most common type of malignant lymphoma with biologically and clinically heterogeneous features. Recently, the tumor microenvironment of this disease has been recognized as an important biological aspect of tumor development and therapeutic targets. Recurrent genetic alterations play significant roles in immune recognition of lymphoma cells. In particular, novel genetic alterations promoting phagocytosis were identified, suggesting a potential therapeutic strategy targeting the “don’t eat me” signal.
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Affiliation(s)
- Daisuke Ennishi
- Center for Comprehensive Genomic Medicine, Okayama University Hospital, Okayama, Japan
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Conway E, Rossi F, Fernandez-Perez D, Ponzo E, Ferrari KJ, Zanotti M, Manganaro D, Rodighiero S, Tamburri S, Pasini D. BAP1 enhances Polycomb repression by counteracting widespread H2AK119ub1 deposition and chromatin condensation. Mol Cell 2021; 81:3526-3541.e8. [PMID: 34186021 PMCID: PMC8428331 DOI: 10.1016/j.molcel.2021.06.020] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 12/15/2022]
Abstract
BAP1 is mutated or deleted in many cancer types, including mesothelioma, uveal melanoma, and cholangiocarcinoma. It is the catalytic subunit of the PR-DUB complex, which removes PRC1-mediated H2AK119ub1, essential for maintaining transcriptional repression. However, the precise relationship between BAP1 and Polycombs remains elusive. Using embryonic stem cells, we show that BAP1 restricts H2AK119ub1 deposition to Polycomb target sites. This increases the stability of Polycomb with their targets and prevents diffuse accumulation of H2AK119ub1 and H3K27me3. Loss of BAP1 results in a broad increase in H2AK119ub1 levels that is primarily dependent on PCGF3/5-PRC1 complexes. This titrates PRC2 away from its targets and stimulates H3K27me3 accumulation across the genome, leading to a general chromatin compaction. This provides evidence for a unifying model that resolves the apparent contradiction between BAP1 catalytic activity and its role in vivo, uncovering molecular vulnerabilities that could be useful for BAP1-related pathologies.
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Affiliation(s)
- Eric Conway
- IEO, European Institute of Oncology IRCCS, Department of Experimental Oncology, Via Adamello 16, 20139 Milan, Italy
| | - Federico Rossi
- IEO, European Institute of Oncology IRCCS, Department of Experimental Oncology, Via Adamello 16, 20139 Milan, Italy
| | - Daniel Fernandez-Perez
- IEO, European Institute of Oncology IRCCS, Department of Experimental Oncology, Via Adamello 16, 20139 Milan, Italy
| | - Eleonora Ponzo
- IEO, European Institute of Oncology IRCCS, Department of Experimental Oncology, Via Adamello 16, 20139 Milan, Italy
| | - Karin Johanna Ferrari
- IEO, European Institute of Oncology IRCCS, Department of Experimental Oncology, Via Adamello 16, 20139 Milan, Italy
| | - Marika Zanotti
- IEO, European Institute of Oncology IRCCS, Department of Experimental Oncology, Via Adamello 16, 20139 Milan, Italy
| | - Daria Manganaro
- IEO, European Institute of Oncology IRCCS, Department of Experimental Oncology, Via Adamello 16, 20139 Milan, Italy
| | - Simona Rodighiero
- IEO, European Institute of Oncology IRCCS, Department of Experimental Oncology, Via Adamello 16, 20139 Milan, Italy
| | - Simone Tamburri
- IEO, European Institute of Oncology IRCCS, Department of Experimental Oncology, Via Adamello 16, 20139 Milan, Italy; University of Milan, Via A. di Rudini 8, Department of Health Sciences, 20142 Milan, Italy.
| | - Diego Pasini
- IEO, European Institute of Oncology IRCCS, Department of Experimental Oncology, Via Adamello 16, 20139 Milan, Italy; University of Milan, Via A. di Rudini 8, Department of Health Sciences, 20142 Milan, Italy.
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Kumar E, Pickard L, Okosun J. Pathogenesis of follicular lymphoma: genetics to the microenvironment to clinical translation. Br J Haematol 2021; 194:810-821. [PMID: 33694181 DOI: 10.1111/bjh.17383] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 02/08/2021] [Indexed: 01/10/2023]
Abstract
Follicular lymphoma (FL) represents a heterogeneous disease both clinically and biologically. The pathognomonic t(14;18) translocation can no longer be thought of as the primary genetic driver, with increasing recognition of the biological relevance of recurrent genetic alterations in epigenetic regulators that now feature as a pivotal hallmark of this lymphoma subtype. Furthermore, sequencing studies have provided a near complete catalogue of additional genetic aberrations. Longitudinal and spatial genetic studies add an additional layer to the biological heterogeneity, providing preliminary molecular insights into high-risk phenotypes such as early progressors and transformation, and also supporting evidence for the existence of persisting re-populating cells that act as lymphoma reservoirs and harbingers for FL recurrence. Simultaneously, understanding of the tumour microenvironmental cues promoting lymphomagenesis and disease progression continue to broaden. More recently, studies are beginning to unravel the convergence and co-operation between the genetics, epigenetics and microenvironment. There is a pressing need to marry biology with therapeutics, especially with the burgeoning treatment landscape in FL, to aid in optimising patient selection and guiding the 'right drug to the right patient'.
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Affiliation(s)
- Emil Kumar
- Centre for Cancer Genomics and Computational Biology, Barts Cancer Institute, Queen Mary University of London, London, UK
| | - Lucy Pickard
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, UK
| | - Jessica Okosun
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, UK
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Wu P, Ma T, Chen Y, Wang F, Chen Y, Gao J, Zhou Z, Jia Y. Treatment of refractory diffuse large B-cell lymphoma by chidamide combined with autologous stem cell transplantation: a case report. Anticancer Drugs 2021; 32:886-889. [PMID: 34145178 DOI: 10.1097/cad.0000000000001093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Diffuse large B-cell lymphoma (DLBCL) is the most common subtype of non-Hodgkin's lymphoma, with certain DLBCLs affecting specific anatomic sites, such as primary cutaneous DLBCL, leg type and intravascular large B-cell lymphoma. However, the occurrence of secondary cutaneous involvement in DLBCL while patients are undergoing regular chemotherapy is rare. In this study, we reported a case of refractory diffuse large B-cell lymphoma with cutaneous involvement that achieved complete remission for more than 4 years with epigenetic regulation of chidamide in combination with chemotherapy and autologous hematopoietic stem cell transplantation including a pretreatment regimen containing chidamide.
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Affiliation(s)
- Pengqiang Wu
- Department of Hematology and Research Laboratory of Hematology, West China Hospital of Sichuan University, Chengdu
- Department of Hematology, The affiliated hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Tao Ma
- Department of Hematology, The affiliated hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Yan Chen
- Department of Hematology, The affiliated hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Fujue Wang
- Department of Hematology and Research Laboratory of Hematology, West China Hospital of Sichuan University, Chengdu
| | - Yingying Chen
- Department of Hematology and Research Laboratory of Hematology, West China Hospital of Sichuan University, Chengdu
| | - Jie Gao
- Department of Hematology and Research Laboratory of Hematology, West China Hospital of Sichuan University, Chengdu
| | - Zhencang Zhou
- Department of Hematology and Research Laboratory of Hematology, West China Hospital of Sichuan University, Chengdu
| | - Yongqian Jia
- Department of Hematology and Research Laboratory of Hematology, West China Hospital of Sichuan University, Chengdu
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Loss of synergistic transcriptional feedback loops drives diverse B-cell cancers. EBioMedicine 2021; 71:103559. [PMID: 34461601 PMCID: PMC8403728 DOI: 10.1016/j.ebiom.2021.103559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/10/2021] [Accepted: 08/13/2021] [Indexed: 12/30/2022] Open
Abstract
Background The most common B-cell cancers, chronic lymphocytic leukemia/lymphoma (CLL), follicular and diffuse large B-cell (FL, DLBCL) lymphomas, have distinct clinical courses, yet overlapping “cell-of-origin”. Dynamic changes to the epigenome are essential regulators of B-cell differentiation. Therefore, we reasoned that these distinct cancers may be driven by shared mechanisms of disruption in transcriptional circuitry. Methods We compared purified malignant B-cells from 52 patients with normal B-cell subsets (germinal center centrocytes and centroblasts, naïve and memory B-cells) from 36 donor tonsils using >325 high-resolution molecular profiling assays for histone modifications, open chromatin (ChIP-, FAIRE-seq), transcriptome (RNA-seq), transcription factor (TF) binding, and genome copy number (microarrays). Findings From the resulting data, we identified gains in active chromatin in enhancers/super-enhancers that likely promote unchecked B-cell receptor signaling, including one we validated near the immunoglobulin superfamily receptors FCMR and PIGR. More striking and pervasive was the profound loss of key B-cell identity TFs, tumor suppressors and their super-enhancers, including EBF1, OCT2(POU2F2), and RUNX3. Using a novel approach to identify transcriptional feedback, we showed that these core transcriptional circuitries are self-regulating. Their selective gain and loss form a complex, iterative, and interactive process that likely curbs B-cell maturation and spurs proliferation. Interpretation Our study is the first to map the transcriptional circuitry of the most common blood cancers. We demonstrate that a critical subset of B-cell TFs and their cognate enhancers form self-regulatory transcriptional feedback loops whose disruption is a shared mechanism underlying these diverse subtypes of B-cell lymphoma. Funding National Institute of Health, Siteman Cancer Center, Barnes-Jewish Hospital Foundation, Doris Duke Foundation.
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226
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Morin RD, Arthur SE, Hodson DJ. Molecular profiling in diffuse large B-cell lymphoma: why so many types of subtypes? Br J Haematol 2021; 196:814-829. [PMID: 34467527 DOI: 10.1111/bjh.17811] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The term diffuse large B-cell lymphoma (DLBCL) includes a heterogeneous collection of biologically distinct tumours. This heterogeneity currently presents a barrier to the successful deployment of novel, biologically targeted therapies. Molecular profiling studies have recently proposed new molecular classification systems. These have the potential to resolve the biological heterogeneity of DLBCL into manageable subgroups of tumours that rely on shared oncogenic programmes. In many cases these biological programmes straddle the boundaries of our existing systems for classifying B-cell lymphomas. Here we review the findings from these major molecular profiling studies with a specific focus on those that propose new genetic subgroups of DLBCL. We highlight the areas of consensus and discordance between these studies and discuss the implications for current clinical practice and for clinical trials. Finally, we address the outstanding challenges and solutions to the introduction of genomic subtyping and precision medicine in DLBCL.
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Affiliation(s)
- Ryan D Morin
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada.,Genome Sciences Centre, BC Cancer, Vancouver, BC, Canada.,BC Cancer Centre for Lymphoid Cancer, Vancouver, BC, Canada
| | - Sarah E Arthur
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada.,BC Cancer Centre for Lymphoid Cancer, Vancouver, BC, Canada
| | - Daniel J Hodson
- Wellcome MRC Cambridge Stem Cell Institute, Cambridge Biomedical Campus, Cambridge, UK.,Department of Haematology, University of Cambridge, Cambridge, UK
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Frequent genetic alterations in immune checkpoint-related genes in intravascular large B-cell lymphoma. Blood 2021; 137:1491-1502. [PMID: 33512416 DOI: 10.1182/blood.2020007245] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 12/09/2020] [Indexed: 12/24/2022] Open
Abstract
Intravascular large B-cell lymphoma (IVLBCL) is a unique type of extranodal lymphoma characterized by selective growth of tumor cells in small vessels without lymphadenopathy. Greater understanding of the molecular pathogenesis of IVLBCL is hampered by the paucity of lymphoma cells in biopsy specimens, creating a limitation in obtaining sufficient tumor materials. To uncover the genetic landscape of IVLBCL, we performed whole-exome sequencing (WES) of 21 patients with IVLBCL using plasma-derived cell-free DNA (cfDNA) (n = 18), patient-derived xenograft tumors (n = 4), and tumor DNA from bone marrow (BM) mononuclear cells (n = 2). The concentration of cfDNA in IVLBCL was significantly higher than that in diffuse large B-cell lymphoma (DLBCL) (P < .0001) and healthy donors (P = .0053), allowing us to perform WES; most mutations detected in BM tumor DNA were successfully captured in cfDNA and xenograft. IVLBCL showed a high frequency of genetic lesions characteristic of activated B-cell-type DLBCL, with the former showing conspicuously higher frequencies (compared with nodal DLBCL) of mutations in MYD88 (57%), CD79B (67%), SETD1B (57%), and HLA-B (57%). We also found that 8 IVLBCL (38%) harbored rearrangements of programmed cell death 1 ligand 1 and 2 (PD-L1/PD-L2) involving the 3' untranslated region; such rearrangements are implicated in immune evasion via PD-L1/PD-L2 overexpression. Our data demonstrate the utility of cfDNA and imply important roles for immune evasion in IVLBCL pathogenesis and PD-1/PD-L1/PD-L2 blockade in therapeutics for IVLBCL.
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228
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Zia A, Rashid S. Systematic transition modeling analysis in the MEF2B-DNA binding interface due to Y69H and K4E variants. J Mol Graph Model 2021; 108:108009. [PMID: 34418874 DOI: 10.1016/j.jmgm.2021.108009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 10/20/2022]
Abstract
Transcriptional coactivator myocyte enhancer factor 2B (MEF2B) mutations are the most common cause of germinal center-derived B-cell non-Hodgkin lymphoma. Despite well-established contributions in lymphomagenesis, the structure-function paradigms of these mutations are largely unknown. Here through in silico approaches, we present structural evaluation of two reported missense variants (K4E and Y69H) in MEF2B to investigate their impact on DNA-binding through molecular dynamics simulation assays. Notably, MEF2B-specific MADs box domain (Lys23, Arg24 and Lys31) and N-terminal loop residues (Gly2, Arg3, Lys4, Lys5, Ile6 and Asn13) contribute in DNA binding, while in MEF2BK4E, DNA binding is facilitated by Gly2, Arg3 and Arg91 (α3) residues. Conversely, in MEF2BY69H, Arg3, Lys5, Ser78, Arg79 and Asn81 residues mediate DNA binding. DNA binding induces pronounced conformational readjustments in MEF2BWT-specific α1-N-terminal loop region, while MEF2BY69H and MEF2BK4E exhibit fluctuations in both α1 and α3. Hydrogen (H)-bond occupancy analysis reveals a similar DNA binding behavior for MEF2WT and MEF2BY69H, compared to MEF2BK4E structure. The Anisotropic Network Model analysis depicts α1 and α3 as more fluctuant regions in MEF2BK4E as compared to other systems. MEF2BWT and MEF2BK4E, Tyr69 residue is involved in p300 binding thus possible influence of Y69H variation in the functions other than DNA binding, such as p300 co-activator recruitment may explain the reduced transcriptional activation of MEF2BY69H. Thus, present study may provide a structural basis of DNA recognition by pinpointing the underlying conformational changes in the dynamics of MEF2BK4E, MEF2BY69H, and MEF2BWT structures that may contribute in the identification of novel therapeutic strategies for lymphomagenesis.
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Affiliation(s)
- Ayisha Zia
- National Center for Bioinformatics, Quaid-i-Azam University, Islamabad, Pakistan.
| | - Sajid Rashid
- National Center for Bioinformatics, Quaid-i-Azam University, Islamabad, Pakistan.
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Bhavsar S, Liu YC, Gibson SE, Moore EM, Swerdlow SH. Mutational Landscape of TdT+ Large B-cell Lymphomas Supports Their Distinction From B-lymphoblastic Neoplasms: A Multiparameter Study of a Rare and Aggressive Entity. Am J Surg Pathol 2021; 46:71-82. [PMID: 34392269 DOI: 10.1097/pas.0000000000001750] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In the current World Health Organization classification, terminal deoxynucleotidyl transferase (TdT) expression in a high grade/large cell B-cell lymphoma (LBCL) indicates a B-lymphoblastic lymphoma/leukemia (B-LBL), although TdT expression in what appear to be mature LBCL or following mature B-cell neoplasms is reported. The frequency of TdT+ LBCL, how to best categorize these cases, and their clinicopathologic features, molecular landscape, and relationship to classic B-LBL remain to be better defined. TdT expression was therefore assessed in 258 LBCL and the results correlated with the cytologic, phenotypic, and cytogenetic findings. Targeted mutational analysis, review of prior biopsies, and assessment of clinical associations was performed in the 6 cases with >10% TdT+ cells. All 6 TdT+ LBCL were blastoid-appearing, CD34-, MYC+, BCL2+, and had MYC rearrangements (R) (5/6 with BCL2 and/or BCL6-R). 5/6 had a prior TdT- LBCL and/or follicular lymphoma and all had an aggressive course. Fifteen nonsynonymous variants in 11 genes were seen in the 4/5 tested cases with mutations. TdT+ and TdT- areas in 1 case showed identical mutations. The mutational profiles were more like those reported in germinal center B-cell type-diffuse LBCL rather than B-LBL. Evolution from preceding TdT- lymphomas was nondivergent in 1/3 tested cases and partially divergent in 2. The clinicopathologic and cytogenetic features of these 6 cases were similar to those found in a meta-analysis that included additional cases of TdT+ LBCL or B-LBL following follicular lymphoma. Thus, TdT+, CD34- large B-cell neoplasms with MYC rearrangements and often a "double hit" are rare, frequently a transformational event and aggressive but are distinct from classic B-LBL.
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Affiliation(s)
- Shweta Bhavsar
- Department of Pathology, UPMC Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA
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230
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Meyer SN, Koul S, Pasqualucci L. Mouse Models of Germinal Center Derived B-Cell Lymphomas. Front Immunol 2021; 12:710711. [PMID: 34456919 PMCID: PMC8387591 DOI: 10.3389/fimmu.2021.710711] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 06/28/2021] [Indexed: 12/19/2022] Open
Abstract
Over the last decades, the revolution in DNA sequencing has changed the way we understand the genetics and biology of B-cell lymphomas by uncovering a large number of recurrently mutated genes, whose aberrant function is likely to play an important role in the initiation and/or maintenance of these cancers. Dissecting how the involved genes contribute to the physiology and pathology of germinal center (GC) B cells -the origin of most B-cell lymphomas- will be key to advance our ability to diagnose and treat these patients. Genetically engineered mouse models (GEMM) that faithfully recapitulate lymphoma-associated genetic alterations offer a valuable platform to investigate the pathogenic roles of candidate oncogenes and tumor suppressors in vivo, and to pre-clinically develop new therapeutic principles in the context of an intact tumor immune microenvironment. In this review, we provide a summary of state-of-the art GEMMs obtained by accurately modelling the most common genetic alterations found in human GC B cell malignancies, with a focus on Burkitt lymphoma, follicular lymphoma, and diffuse large B-cell lymphoma, and we discuss how lessons learned from these models can help guide the design of novel therapeutic approaches for this disease.
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Affiliation(s)
- Stefanie N. Meyer
- Institute for Cancer Genetics, Columbia University, New York, NY, United States
| | - Sanjay Koul
- Department of Biological Sciences & Geology, Queensborough Community College (City University of New York), Bayside, NY, United States
| | - Laura Pasqualucci
- Institute for Cancer Genetics, Columbia University, New York, NY, United States
- Department of Pathology & Cell Biology, Columbia University, New York, NY, United States
- The Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, United States
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231
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Li Y, Yang G, Yang C, Tang P, Chen J, Zhang J, Liu J, Ouyang L. Targeting Autophagy-Related Epigenetic Regulators for Cancer Drug Discovery. J Med Chem 2021; 64:11798-11815. [PMID: 34378389 DOI: 10.1021/acs.jmedchem.1c00579] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Existing evidence has demonstrated that epigenetic modifications (including DNA methylation, histone modifications, and microRNAs), which are associated with the occurrence and development of tumors, can directly or indirectly regulate autophagy. In particular, nuclear events induced by several epigenetic regulators can regulate the autophagic process and expression levels of tumor-associated genes, thereby promoting tumor progression. Tumor-associated microRNAs, including oncogenic and tumor-suppressive microRNAs, are of great significance to autophagy during tumor progression. Targeting autophagy with emerging epigenetic drugs is expected to be a promising therapeutic strategy for human tumors. From this perspective, we aim to summarize the role of epigenetic modification in the autophagic process and the underlying molecular mechanisms of tumorigenesis. Furthermore, the regulatory efficacy of epigenetic drugs on the autophagic process in tumors is also summarized. This perspective may provide a theoretical basis for the combined treatment of epigenetic drugs/autophagy mediators in tumors.
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Affiliation(s)
- Yang Li
- State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Gaoxia Yang
- State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Chengcan Yang
- State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Pan Tang
- State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Juncheng Chen
- State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Jifa Zhang
- State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Jie Liu
- State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Liang Ouyang
- State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
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232
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Heward J, Konali L, D'Avola A, Close K, Yeomans A, Philpott M, Dunford J, Rahim T, Al Seraihi AF, Wang J, Korfi K, Araf S, Iqbal S, Bewicke-Copley F, Kumar E, Barisic D, Calaminici M, Clear A, Gribben J, Johnson P, Neve R, Cutillas P, Okosun J, Oppermann U, Melnick A, Packham G, Fitzgibbon J. KDM5 inhibition offers a novel therapeutic strategy for the treatment of KMT2D mutant lymphomas. Blood 2021; 138:370-381. [PMID: 33786580 PMCID: PMC8351530 DOI: 10.1182/blood.2020008743] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 03/04/2021] [Indexed: 02/07/2023] Open
Abstract
Loss-of-function mutations in KMT2D are a striking feature of germinal center (GC) lymphomas, resulting in decreased histone 3 lysine 4 (H3K4) methylation and altered gene expression. We hypothesized that inhibition of the KDM5 family, which demethylates H3K4me3/me2, would reestablish H3K4 methylation and restore the expression of genes repressed on loss of KMT2D. KDM5 inhibition increased H3K4me3 levels and caused an antiproliferative response in vitro, which was markedly greater in both endogenous and gene-edited KMT2D mutant diffuse large B-cell lymphoma cell lines, whereas tumor growth was inhibited in KMT2D mutant xenografts in vivo. KDM5 inhibition reactivated both KMT2D-dependent and -independent genes, resulting in diminished B-cell signaling and altered expression of B-cell lymphoma 2 (BCL2) family members, including BCL2 itself. KDM5 inhibition may offer an effective therapeutic strategy for ameliorating KMT2D loss-of-function mutations in GC lymphomas.
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Affiliation(s)
- James Heward
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Lola Konali
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Annalisa D'Avola
- Cancer Research UK Centre, Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton, United Kingdom
| | - Karina Close
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Alison Yeomans
- Cancer Research UK Centre, Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton, United Kingdom
| | - Martin Philpott
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - James Dunford
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Tahrima Rahim
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Ahad F Al Seraihi
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Jun Wang
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Koorosh Korfi
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Shamzah Araf
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Sameena Iqbal
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Findlay Bewicke-Copley
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Emil Kumar
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Darko Barisic
- Department of Medicine, Weill Cornell Medicine, New York, NY; and
| | - Maria Calaminici
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Andrew Clear
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - John Gribben
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Peter Johnson
- Cancer Research UK Centre, Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton, United Kingdom
| | | | - Pedro Cutillas
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Jessica Okosun
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Udo Oppermann
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Ari Melnick
- Department of Medicine, Weill Cornell Medicine, New York, NY; and
| | - Graham Packham
- Cancer Research UK Centre, Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton, United Kingdom
| | - Jude Fitzgibbon
- Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
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233
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Yi S, Yan Y, Jin M, Xiong W, Yu Z, Yu Y, Cui R, Wang J, Wang Y, Lin Y, Jia Y, Zhang D, Wang T, Lv R, Liu W, Sui W, Huang W, Fu M, Xu Y, Deng S, An G, Zou D, Li Z, Shi J, Xiao Z, Wang J, Cheng T, Gale RP, Wang L, Qiu L. High incidence of MYD88 and KMT2D mutations in Chinese with chronic lymphocytic leukemia. Leukemia 2021; 35:2412-2415. [PMID: 33483618 PMCID: PMC8295410 DOI: 10.1038/s41375-021-01124-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/29/2020] [Accepted: 01/07/2021] [Indexed: 01/29/2023]
Affiliation(s)
- Shuhua Yi
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Yuting Yan
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Meiling Jin
- Department of Systems Biology, Beckman Research Institute, City of Hope National Comprehensive Cancer Center, Monrovia, California, USA, 91016
| | - Wenjie Xiong
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Zhen Yu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Ying Yu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Rui Cui
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020,Department of Hematology, Tianjin First Center Hospital, Tianjin 300192, China
| | - Jun Wang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Yi Wang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Yani Lin
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Yujiao Jia
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Donglei Zhang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Tingyu Wang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Rui Lv
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Wei Liu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Weiwei Sui
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Wenyang Huang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Mingwei Fu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Yan Xu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Shuhui Deng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Gang An
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Dehui Zou
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Zengjun Li
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Jun Shi
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Zhijian Xiao
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Jianxiang Wang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Tao Cheng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
| | - Robert Peter Gale
- Centre for Haematology Research, Department of Immunology and Inflammation, Imperial College London, London, UK
| | - Lili Wang
- Department of Systems Biology, Beckman Research Institute, City of Hope National Comprehensive Cancer Center, Monrovia, California, USA, 91016
| | - Lugui Qiu
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Blood Diseases Hospital & Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China, 300020
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234
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Poynton E, Okosun J. Liquid biopsy in lymphoma: Is it primed for clinical translation? EJHAEM 2021; 2:616-627. [PMID: 35844685 PMCID: PMC9175672 DOI: 10.1002/jha2.212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 12/23/2022]
Abstract
The simultaneous growth in our understanding of lymphoma biology and the burgeoning therapeutic options has come with a renewed drive for precision-based approaches and how best to incorporate them into contemporary and future patient care. In the hunt for accurate and sensitive biomarkers, liquid biopsies, particularly circulating tumour DNA, have come to the forefront as a promising tool in multiple cancer types including lymphomas, with considerable implications for clinical practice. Liquid biopsy analyses could supplement existing tissue biopsies with distinct advantages including the minimally invasive nature and the ease with which it can be repeated during a patient's clinical journey. Circulating tumour DNA (ctDNA) analyses has been and continues to be evaluated across lymphoma subtypes with potential applications as a diagnostic, disease monitoring and treatment selection tool. To make the leap into the clinic, these assays must demonstrate accuracy, reliability and a quick turnaround to be employed in the real-time clinical management of lymphoma patients. Here, we review the available ctDNA assays and discuss key practical and technical issues around improving sensitivity. We then focus on their potential roles in several lymphoma subtypes exemplified by recent studies and provide a glimpse of different features that can be analysed beyond ctDNA.
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Affiliation(s)
- Edward Poynton
- Centre for Haemato‐OncologyBarts Cancer Institute, Queen Mary University of LondonLondonUK
| | - Jessica Okosun
- Centre for Haemato‐OncologyBarts Cancer Institute, Queen Mary University of LondonLondonUK
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235
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He MY, Kridel R. Treatment resistance in diffuse large B-cell lymphoma. Leukemia 2021; 35:2151-2165. [PMID: 34017074 DOI: 10.1038/s41375-021-01285-3] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 04/21/2021] [Accepted: 05/05/2021] [Indexed: 01/29/2023]
Abstract
Diffuse large B-cell lymphoma (DLBCL) is a highly heterogeneous disease and represents the most common subtype of lymphoma. Although 60-70% of all patients can be cured by the current standard of care in the frontline setting, the majority of the remaining patients will experience treatment resistance and have a poor clinical outcome. Numerous efforts have been made to improve the efficacy of the standard regimen by, for example, dose intensification or adding novel agents. However, these results generally failed to demonstrate significant clinical benefits. Hence, understanding treatment resistance is a pressing need to optimize the outcome of those patients. In this Review, we first describe the conceptual sources of treatment resistance in DLBCL and then provide detailed and up-to-date molecular insight into the mechanisms of resistance to the current treatment options in DLBCL. We lastly highlight the potential strategies for rationally managing treatment resistance from both the preventive and interventional perspectives.
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Affiliation(s)
- Michael Y He
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Robert Kridel
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada. .,Institute of Medical Science, University of Toronto, Toronto, ON, Canada. .,Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.
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236
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Shimada K, Kiyoi H. Current progress and future perspectives of research on intravascular large B-cell lymphoma. Cancer Sci 2021; 112:3953-3961. [PMID: 34327781 PMCID: PMC8486207 DOI: 10.1111/cas.15091] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 07/12/2021] [Accepted: 07/25/2021] [Indexed: 12/30/2022] Open
Abstract
Intravascular large B‐cell lymphoma is a rare disease of the large B cells characterized by selective growth in the lumina of small vessels in systemic organs. Since first reported in 1959, the difficulty of obtaining sufficient tumor cells from biopsy specimens has hampered the elucidation of its underlying biology. Recent progress using xenograft models and plasma cell‐free DNA has uncovered genetic features that are similar to those of activated B‐cell type diffuse large B‐cell lymphoma, including MYD88 and CD79B mutations and frequent alterations in immune check point‐related genes such as PD‐L1 and PD‐L2. Given the improvement in clinical outcomes and a higher risk of secondary central nervous system (CNS) involvement in the rituximab era, a phase 2 trial of R‐CHOP combined with high‐dose methotrexate and intrathecal chemotherapy as a CNS‐oriented therapy has been conducted. This trial, the PRIMEUR‐IVL study, has displayed good progression‐free survival and a low cumulative incidence of secondary CNS involvement. Long‐term follow‐up within this trial is still ongoing. Further understanding of the pathophysiology of the disease and improvements in clinical outcomes are still needed.
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Affiliation(s)
- Kazuyuki Shimada
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hitoshi Kiyoi
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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237
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Katainen R, Donner I, Räisänen M, Berta D, Kuosmanen A, Kaasinen E, Hietala M, Aaltonen LA. Novel germline variant in the histone demethylase and transcription regulator KDM4C induces a multi-cancer phenotype. J Med Genet 2021; 59:644-651. [PMID: 34281993 PMCID: PMC9252859 DOI: 10.1136/jmedgenet-2021-107747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 05/25/2021] [Indexed: 11/10/2022]
Abstract
Background Genes involved in epigenetic regulation are central for chromatin structure and gene expression. Specific mutations in these might promote carcinogenesis in several tissue types. Methods We used exome, whole-genome and Sanger sequencing to detect rare variants shared by seven affected individuals in a striking early-onset multi-cancer family. The only variant that segregated with malignancy resided in a histone demethylase KDM4C. Consequently, we went on to study the epigenetic landscape of the mutation carriers with ATAC, ChIP (chromatin immunoprecipitation) and RNA-sequencing from lymphoblastoid cell lines to identify possible pathogenic effects. Results A novel variant in KDM4C, encoding a H3K9me3 histone demethylase and transcription regulator, was found to segregate with malignancy in the family. Based on Roadmap Epigenomics Project data, differentially accessible chromatin regions between the variant carriers and controls enrich to normally H3K9me3-marked chromatin. We could not detect a difference in global H3K9 trimethylation levels. However, carriers of the variant seemed to have more trimethylated H3K9 at transcription start sites. Pathway analyses of ChIP-seq and differential gene expression data suggested that genes regulated through KDM4C interaction partner EZH2 and its interaction partner PLZF are aberrantly expressed in mutation carriers. Conclusions The apparent dysregulation of H3K9 trimethylation and KDM4C-associated genes in lymphoblastoid cells supports the hypothesis that the KDM4C variant is causative of the multi-cancer susceptibility in the family. As the variant is ultrarare, located in the conserved catalytic JmjC domain and predicted pathogenic by the majority of available in silico tools, further studies on the role of KDM4C in cancer predisposition are warranted.
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Affiliation(s)
- Riku Katainen
- Applied Tumor Genomics Research Program and Department of Medical and Clinical Genetics, University of Helsinki Faculty of Medicine, Helsinki, Finland
| | - Iikki Donner
- Applied Tumor Genomics Research Program and Department of Medical and Clinical Genetics, University of Helsinki Faculty of Medicine, Helsinki, Finland
| | - Maritta Räisänen
- Applied Tumor Genomics Research Program and Department of Medical and Clinical Genetics, University of Helsinki Faculty of Medicine, Helsinki, Finland
| | - Davide Berta
- Applied Tumor Genomics Research Program and Department of Medical and Clinical Genetics, University of Helsinki Faculty of Medicine, Helsinki, Finland
| | - Anna Kuosmanen
- Applied Tumor Genomics Research Program and Department of Medical and Clinical Genetics, University of Helsinki Faculty of Medicine, Helsinki, Finland
| | - Eevi Kaasinen
- Applied Tumor Genomics Research Program and Department of Medical and Clinical Genetics, University of Helsinki Faculty of Medicine, Helsinki, Finland
| | - Marja Hietala
- Department of Clinical Genetics, TYKS Turku University Hospital and University of Turku Institute of Biomedicine, Turku, Finland
| | - Lauri A Aaltonen
- Applied Tumor Genomics Research Program and Department of Medical and Clinical Genetics, University of Helsinki Faculty of Medicine, Helsinki, Finland
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238
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Chapman JR, Bouska AC, Zhang W, Alderuccio JP, Lossos IS, Rimsza LM, Maguire A, Yi S, Chan WC, Vega F, Song JY. EBV-positive HIV-associated diffuse large B cell lymphomas are characterized by JAK/STAT (STAT3) pathway mutations and unique clinicopathologic features. Br J Haematol 2021; 194:870-878. [PMID: 34272731 DOI: 10.1111/bjh.17708] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/22/2021] [Accepted: 06/29/2021] [Indexed: 12/20/2022]
Abstract
Even in the era of highly active combination antiretroviral therapy (cART), patients with HIV have a disproportionate risk of developing aggressive lymphomas that are frequently Epstein-Barr virus (EBV)-related. Here, we investigate HIV-associated diffuse large B-cell lymphoma (HIV-DLBCL) and compare EBV-positive and EBV-negative cases. HIV-DLBCL were identified from two academic medical centres and characterised by immunohistochemistry, EBV status, fluorescence in situ hybridisation, cell of origin determination by gene expression profiling, and targeted deep sequencing using a custom mutation panel of 334 genes. We also applied the Lymphgen tool to determine the genetic subtype of each case. Thirty HIV-DLBCL were identified, with a median patient age of 46 years and male predominance (5:1). Thirteen cases (48%) were EBV-positive and 14 (52%) EBV-negative. Nine of the 16 tested cases (56%) had MYC rearrangement, three (19%) had BCL6 (two of which were double hit MYC/BCL6) and none had BCL2 rearrangements. Using the Lymphgen tool, half of the cases (15) were classified as other. All HIV-DLBCL showed mutational abnormalities, the most frequent being TP53 (37%), MYC (30%), STAT3 (27%), HIST1H1E (23%), EP300 (20%), TET2 (20%), SOCS1 (17%) and SGK1 (17%). EBV-negative cases were mostly of germinal centre B-cell (GCB) origin (62%), showed more frequent mutations per case (a median of 13·5/case) and significant enrichment of TP53 (57% vs. 15%; P = 0·046), SGK1 (36% vs. 0%; P = 0·04), EP300 (43% vs. 0%; P = 0·02) and histone-modifying gene (e.g. HIST1H1E, HIST1H1D, 79% vs. 31%; P = 0·02) mutations. EBV-positive cases were mostly of non-GCB origin (70%), with fewer mutations per case (median 8/case; P = 0·007), and these tumours were enriched for STAT3 mutations (P = 0·10). EBV-positive cases had a higher frequency of MYC mutations but the difference was not significant (36% vs. 15%; P = 0·38). EBV-association was more frequent in HIV-DLBCLs, arising in patients with lower CD4 counts at diagnosis (median 46·5 vs. 101, P = 0·018). In the era of cART, approximately half of HIV-DLBCL are EBV-related. HIV-DLBCL are enriched for MYC rearrangements, MYC mutations and generally lack BCL2 rearrangements, regardless of EBV status. Among HIV-DLBCL, tumours that are EBV-negative and EBV-positive appear to have important differences, the latter arising in context of lower CD4 count, showing frequent non-GCB origin, lower mutation burden and recurrent STAT3 mutations.
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Affiliation(s)
- Jennifer R Chapman
- Division of Hematopathology, Department of Pathology, University of Miami and Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Alyssa C Bouska
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Weiwei Zhang
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Juan Pablo Alderuccio
- Division of Hematology, Department of Medicine, University of Miami and Sylvester Comprehensive Cancer Center, Miami, FL, USA
| | - Izidore S Lossos
- Division of Hematology, Department of Medicine, University of Miami and Sylvester Comprehensive Cancer Center, Miami, FL, USA.,Department of Molecular and Cellular Pharmacology, University of Miami, Miami, FL, USA
| | - Lisa M Rimsza
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Scottsdale, AZ, USA
| | - Alanna Maguire
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Scottsdale, AZ, USA
| | - Shuhua Yi
- Department of Pathology, City of Hope National Medical Center, Duarte, CA, USA
| | - Wing C Chan
- Department of Pathology, City of Hope National Medical Center, Duarte, CA, USA
| | - Francisco Vega
- Department of Hematopathology, MD Anderson Cancer Center, Houston, TX, USA
| | - Joo Y Song
- Department of Pathology, City of Hope National Medical Center, Duarte, CA, USA
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239
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Exploration of the Activation Mechanism of the Epigenetic Regulator MLL3: A QM/MM Study. Biomolecules 2021; 11:biom11071051. [PMID: 34356675 PMCID: PMC8301819 DOI: 10.3390/biom11071051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 07/07/2021] [Accepted: 07/10/2021] [Indexed: 11/17/2022] Open
Abstract
The mixed lineage leukemia 3 or MLL3 is the enzyme in charge of the writing of an epigenetic mark through the methylation of lysine 4 from the N-terminal domain of histone 3 and its deregulation has been related to several cancer lines. An interesting feature of this enzyme comes from its regulation mechanism, which involves its binding to an activating dimer before it can be catalytically functional. Once the trimer is formed, the reaction mechanism proceeds through the deprotonation of the lysine followed by the methyl-transfer reaction. Here we present a detailed exploration of the activation mechanism through a QM/MM approach focusing on both steps of the reaction, aiming to provide new insights into the deprotonation process and the role of the catalytic machinery in the methyl-transfer reaction. Our finding suggests that the source of the activation mechanism comes from conformational restriction mediated by the formation of a network of salt-bridges between MLL3 and one of the activating subunits, which restricts and stabilizes the positioning of several residues relevant for the catalysis. New insights into the deprotonation mechanism of lysine are provided, identifying a valine residue as crucial in the positioning of the water molecule in charge of the process. Finally, a tyrosine residue was found to assist the methyl transfer from SAM to the target lysine.
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240
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Mossadegh-Keller N, Brisou G, Beyou A, Nadel B, Roulland S. Human B Lymphomas Reveal Their Secrets Through Genetic Mouse Models. Front Immunol 2021; 12:683597. [PMID: 34335584 PMCID: PMC8323519 DOI: 10.3389/fimmu.2021.683597] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 05/12/2021] [Indexed: 12/18/2022] Open
Abstract
Lymphomas are cancers deriving from lymphocytes, arising preferentially in secondary lymphoid organs, and represent the 6th cancer worldwide and the most frequent blood cancer. The majority of B cell Non-Hodgkin lymphomas (B-NHL) develop from germinal center (GC) experienced mature B cells. GCs are transient structures that form in lymphoid organs in response to antigen exposure of naive B cells, and where B cell receptor (BCR) affinity maturation occurs to promote B cell differentiation into memory B and plasma cells producing high-affinity antibodies. Genomic instability associated with the somatic hypermutation (SHM) and class-switch recombination (CSR) processes during GC transit enhance susceptibility to malignant transformation. Most B cell differentiation steps in the GC are at the origin of frequent B cell malignant entities, namely Follicular Lymphoma (FL) and GCB diffuse large B cell lymphomas (GCB-DLBCL). Over the past decade, large sequencing efforts have provided a great boost in the identification of candidate oncogenes and tumor suppressors involved in FL and DLBCL oncogenesis. Mouse models have been instrumental to accurately mimic in vivo lymphoma-specific mutations and interrogate their normal function in the GC context and their oncogenic function leading to lymphoma onset. The limited access of biopsies during the initiating steps of the disease, the cellular and (epi)genetic heterogeneity of individual tumors across and within patients linked to perturbed dynamics of GC ecosystems make the development of genetically engineered mouse models crucial to decipher lymphomagenesis and disease progression and eventually to test the effects of novel targeted therapies. In this review, we provide an overview of some of the important genetically engineered mouse models that have been developed to recapitulate lymphoma-associated (epi)genetic alterations of two frequent GC-derived lymphoma entities: FL and GCB-DLCBL and describe how those mouse models have improved our knowledge of the molecular processes supporting GC B cell transformation.
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Affiliation(s)
| | - Gabriel Brisou
- Aix Marseille Univ, CNRS, INSERM, CIML, Marseille, France.,Department of Hematology, Institut Paoli-Calmettes, Marseille, France
| | - Alicia Beyou
- Aix Marseille Univ, CNRS, INSERM, CIML, Marseille, France
| | - Bertrand Nadel
- Aix Marseille Univ, CNRS, INSERM, CIML, Marseille, France
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241
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Onaindia A, Santiago-Quispe N, Iglesias-Martinez E, Romero-Abrio C. Molecular Update and Evolving Classification of Large B-Cell Lymphoma. Cancers (Basel) 2021; 13:3352. [PMID: 34283060 PMCID: PMC8269067 DOI: 10.3390/cancers13133352] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/21/2021] [Accepted: 06/25/2021] [Indexed: 12/12/2022] Open
Abstract
Diffuse large B-cell lymphomas (DLBCLs) are aggressive B-cell neoplasms with considerable clinical, biologic, and pathologic diversity. The application of high throughput technologies to the study of lymphomas has yielded abundant molecular data leading to the identification of distinct molecular identities and novel pathogenetic pathways. In light of this new information, newly refined diagnostic criteria have been established in the fourth edition of the World Health Organization (WHO) consensus classification of lymphomas, which was revised in 2016. This article reviews the histopathological and molecular features of the various aggressive B-cell lymphoma subtypes included in the updated classification.
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Affiliation(s)
- Arantza Onaindia
- Bioaraba Health Research Institute, Oncohaematology Research Group, 01070 Vitoria-Gasteiz, Spain
- Osakidetza Basque Health Service, Araba University Hospital, Pathology Department, 01070 Vitoria-Gasteiz, Spain; (N.S.-Q.); (E.I.-M.); (C.R.-A.)
| | - Nancy Santiago-Quispe
- Osakidetza Basque Health Service, Araba University Hospital, Pathology Department, 01070 Vitoria-Gasteiz, Spain; (N.S.-Q.); (E.I.-M.); (C.R.-A.)
| | - Erika Iglesias-Martinez
- Osakidetza Basque Health Service, Araba University Hospital, Pathology Department, 01070 Vitoria-Gasteiz, Spain; (N.S.-Q.); (E.I.-M.); (C.R.-A.)
| | - Cristina Romero-Abrio
- Osakidetza Basque Health Service, Araba University Hospital, Pathology Department, 01070 Vitoria-Gasteiz, Spain; (N.S.-Q.); (E.I.-M.); (C.R.-A.)
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242
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Hanel W, Epperla N. Evolving therapeutic landscape in follicular lymphoma: a look at emerging and investigational therapies. J Hematol Oncol 2021; 14:104. [PMID: 34193230 PMCID: PMC8247091 DOI: 10.1186/s13045-021-01113-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/04/2021] [Indexed: 02/08/2023] Open
Abstract
Follicular Lymphoma (FL) is the most common subtype of indolent B cell non-Hodgkin lymphoma. The clinical course can be very heterogeneous with some patients being safely observed over many years without ever requiring treatment to other patients having more rapidly progressive disease requiring multiple lines of treatment for disease control. Front-line treatment of advanced FL has historically consisted of chemoimmunotherapy but has extended to immunomodulatory agents such as lenalidomide. In the relapsed setting, several exciting therapies that target the underlying biology and immune microenvironment have emerged, most notable among them include targeted therapies such as phosphoinositide-3 kinase and Enhancer of Zeste 2 Polycomb Repressive Complex 2 inhibitors and cellular therapies including chimeric antigen receptor T cells and bispecific T cell engagers. There are several combination therapies currently in clinical trials that appear promising. These therapies will likely reshape the treatment approach for patients with relapsed and refractory FL in the coming years. In this article, we provide a comprehensive review of the emerging and investigational therapies in FL and discuss how these agents will impact the therapeutic landscape in FL.
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Affiliation(s)
- Walter Hanel
- Division of Hematology, Department of Medicine, The James Cancer Hospital and Solove Research Institute, The Ohio State University, 460 W 10th Ave, Columbus, OH 43210 USA
| | - Narendranath Epperla
- Division of Hematology, Department of Medicine, The James Cancer Hospital and Solove Research Institute, The Ohio State University, 460 W 10th Ave, Columbus, OH 43210 USA
- The Ohio State University Comprehensive Cancer Center, 1110E Lincoln Tower, 1800 Cannon Drive, Columbus, OH 43210 USA
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243
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SOX11, CD70 and Treg cells configure the tumor immune microenvironment of aggressive mantle cell lymphoma. Blood 2021; 138:2202-2215. [PMID: 34189576 DOI: 10.1182/blood.2020010527] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 06/16/2021] [Indexed: 11/20/2022] Open
Abstract
Mantle cell lymphoma (MCL) is a mature B-cell neoplasm with a heterogeneous clinical and biological behavior. SOX11 oncogenic expression contributes to the aggressiveness of these tumors by different mechanisms including tumor and stromal cell interactions. However, the precise composition of the immune cell microenvironment of MCL, its possible relationship to SOX11 expression, and how it may contribute to tumor behavior is not well known. Here, we performed an integrative transcriptome analysis of 730 immune-related genes combined with the immune cell phenotype analysis by immunohistochemistry in SOX11+ and SOX11- primary nodal MCL cases and non-neoplastic reactive lymph nodes (RLN). SOX11+ MCL had a significant lower T-cell intratumoral infiltration compared to negative cases. A reduced expression of MHCI/II-like and T-cell costimulation and signaling activation related transcripts was significantly associated with poor clinical outcome. Moreover, we identified CD70 as a SOX11 direct target gene, whose overexpression was induced in SOX11+ but not SOX11- tumor cells by CD40L in vitro. CD70 was overexpressed in primary SOX11+ MCL and it was associated with an immune unbalance of the tumor microenvironment characterized by increased number of effector Treg cell infiltration, higher proliferation, and aggressive clinical course. CD27 was expressed with moderate to strong intensity in 76% of cases. Overall, our results suggest that SOX11 expression in MCL is associated with an immunosuppressive microenvironment characterized by CD70 overexpression in tumor cells, increased Treg cell infiltration and downmodulation of antigen-processing and -presentation and T-cell activation that could promote MCL progression and represent a potential target for tailored therapies.
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244
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Ozyerli-Goknar E, Bagci-Onder T. Epigenetic Deregulation of Apoptosis in Cancers. Cancers (Basel) 2021; 13:3210. [PMID: 34199020 PMCID: PMC8267644 DOI: 10.3390/cancers13133210] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/09/2021] [Accepted: 06/11/2021] [Indexed: 12/11/2022] Open
Abstract
Cancer cells possess the ability to evade apoptosis. Genetic alterations through mutations in key genes of the apoptotic signaling pathway represent a major adaptive mechanism of apoptosis evasion. In parallel, epigenetic changes via aberrant modifications of DNA and histones to regulate the expression of pro- and antiapoptotic signal mediators represent a major complementary mechanism in apoptosis regulation and therapy response. Most epigenetic changes are governed by the activity of chromatin modifying enzymes that add, remove, or recognize different marks on histones and DNA. Here, we discuss how apoptosis signaling components are deregulated at epigenetic levels, particularly focusing on the roles of chromatin-modifying enzymes in this process. We also review the advances in cancer therapies with epigenetic drugs such as DNMT, HMT, HDAC, and BET inhibitors, as well as their effects on apoptosis modulation in cancer cells. Rewiring the epigenome by drug interventions can provide therapeutic advantage for various cancers by reverting therapy resistance and leading cancer cells to undergo apoptotic cell death.
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Affiliation(s)
- Ezgi Ozyerli-Goknar
- Brain Cancer Research and Therapy Laboratory, Koç University School of Medicine, Istanbul 34450, Turkey;
- Research Center for Translational Medicine, Koç University, Istanbul 34450, Turkey
| | - Tugba Bagci-Onder
- Brain Cancer Research and Therapy Laboratory, Koç University School of Medicine, Istanbul 34450, Turkey;
- Research Center for Translational Medicine, Koç University, Istanbul 34450, Turkey
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245
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Lavacchi D, Landini I, Perrone G, Roviello G, Mini E, Nobili S. Pharmacogenetics in diffuse large B-cell lymphoma treated with R-CHOP: Still an unmet challenge. Pharmacol Ther 2021; 229:107924. [PMID: 34175369 DOI: 10.1016/j.pharmthera.2021.107924] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/19/2021] [Accepted: 05/24/2021] [Indexed: 02/07/2023]
Abstract
DLBCL is the most common lymphoma representing approximately one third of all non-Hodgkin lymphomas and about 40% of patients do not benefit of the standard first-line immune-chemotherapeutic treatment (i.e., R-CHOP - rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone) that is administered as upfront therapy to substantially all patients independently from the stage of disease and other prognostic parameters. The administration of other pharmacological treatments is in fact limited to selected patients, unfitting for R-CHOP. Although clinical prognostic scores, i.e. International Prognostic Index (IPI), and molecular classifiers based on the cell of origin are available, at present no biomarkers predictive of R-CHOP response has been identified and validated. Constitutional polymorphisms of genes involved in the mechanism of action of drugs included in R-CHOP have been suggested by many authors to play a role in the efficacy and in some case in the toxicity of this treatment. Thus, it is conceivable that in the future, after proper validation, some polymorphisms can be used as pharmacogenetic biomarkers of therapeutic outcome in this disease setting. This review discusses the status of the art on molecular biomarkers predictive of DLBCL prognosis and deals with the relevant issue of the variability in response to DLBCL drug treatment. Overall, this review focuses on single nucleotide polymorphisms (SNPs) that, based on a candidate gene approach or on a GWAS analysis, have been suggested to play a role in response to R-CHOP. In particular, SNPs discovered by a candidate gene approach are related to gene involved in drug transport (i.e. ATP-binding cassette transporters), drug metabolism, drug detoxification enzymes, oxidative stress, apoptosis, DNA repair, immunity and angiogenesis. Data from a GWAS analysis performed in DLBCL patients treated with R-CHOP, identified two SNPs associated with clinical outcomes related to genes involved in pivotal cellular processes and in transcriptional regulation and cell cycle progression, respectively. Ongoing prospective pharmacogenetic clinical trials, including a GWAS study we performed, have also been discussed.
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Affiliation(s)
- Daniele Lavacchi
- Clinical Oncology Unit, Careggi University Hospital, Florence, Italy
| | - Ida Landini
- Department of Health Sciences, University of Florence, Florence, Italy; DENOTHE Excellence Center, University of Florence, Florence, Italy
| | - Gabriele Perrone
- Department of Health Sciences, University of Florence, Florence, Italy; DENOTHE Excellence Center, University of Florence, Florence, Italy
| | - Giandomenico Roviello
- Department of Health Sciences, University of Florence, Florence, Italy; DENOTHE Excellence Center, University of Florence, Florence, Italy
| | - Enrico Mini
- Department of Health Sciences, University of Florence, Florence, Italy; DENOTHE Excellence Center, University of Florence, Florence, Italy; Cancer Pharmacology Working Group of the Italian Society of Pharmacology, Milan, Italy.
| | - Stefania Nobili
- Cancer Pharmacology Working Group of the Italian Society of Pharmacology, Milan, Italy; Department of Neurosciences, Imaging and Clinical Sciences, "G. D'Annunzio" University of Chieti-Pescara, Chieti, Italy.
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246
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Clinical Correlations of Polycomb Repressive Complex 2 in Different Tumor Types. Cancers (Basel) 2021; 13:cancers13133155. [PMID: 34202528 PMCID: PMC8267669 DOI: 10.3390/cancers13133155] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 06/20/2021] [Indexed: 12/13/2022] Open
Abstract
Simple Summary PRC2 (Polycomb repressive complex 2) is a catalytic multi-subunit complex involved in transcriptional repression through the methylation of lysine 27 at histone 3 (H3K27me1/2/3). Dysregulation of PRC2 has been linked to tumor development and progression. Here, we performed a comprehensive analysis of data in the genomic and transcriptomic (cBioPortal, KMplot) database portals of clinical tumor samples and evaluated clinical correlations of EZH2, SUZ12, and EED. Next, we developed an original Python application enabling the identification of genes cooperating with PRC2 in oncogenic processes for the analysis of the DepMap CRISPR knockout database. Our study identified cancer types that are most likely to be responsive to PRC2 inhibitors. By analyzing co-dependencies with other genes, this analysis also provides indications of prognostic biomarkers and new therapeutic regimens. Abstract PRC2 (Polycomb repressive complex 2) is an evolutionarily conserved protein complex required to maintain transcriptional repression. The core PRC2 complex includes EZH2, SUZ12, and EED proteins and methylates histone H3K27. PRC2 is known to contribute to carcinogenesis and several small molecule inhibitors targeting PRC2 have been developed. The present study aimed to identify the cancer types in which PRC2 targeting drugs could be beneficial. We queried genomic and transcriptomic (cBioPortal, KMplot) database portals of clinical tumor samples to evaluate clinical correlations of PRC2 subunit genes. EZH2, SUZ12, and EED gene amplification was most frequently found in prostate cancer, whereas lymphoid malignancies (DLBCL) frequently showed EZH2 mutations. In both cases, PRC2 alterations were associated with poor prognosis. Moreover, higher expression of PRC2 subunits was correlated with poor survival in renal and liver cancers as well as gliomas. Finally, we generated a Python application to analyze the correlation of EZH2/SUZ12/EED gene knockouts by CRISPR with the alterations detected in the cancer cell lines using DepMap data. As a result, we were able to identify mutations that correlated significantly with tumor cell sensitivity to PRC2 knockout, including SWI/SNF, COMPASS/COMPASS-like subunits and BCL2, warranting the investigation of these genes as potential markers of sensitivity to PRC2-targeting drugs.
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247
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The MLL3/4 H3K4 methyltransferase complex in establishing an active enhancer landscape. Biochem Soc Trans 2021; 49:1041-1054. [PMID: 34156443 PMCID: PMC8286814 DOI: 10.1042/bst20191164] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/21/2021] [Accepted: 05/24/2021] [Indexed: 12/23/2022]
Abstract
Enhancers are cis-regulatory elements that play essential roles in tissue-specific gene expression during development. Enhancer function in the expression of developmental genes requires precise regulation, while deregulation of enhancer function could be the main cause of tissue-specific cancer development. MLL3/KMT2C and MLL4/KMT2D are two paralogous histone modifiers that belong to the SET1/MLL (also named COMPASS) family of lysine methyltransferases and play critical roles in enhancer-regulated gene activation. Importantly, large-scale DNA sequencing studies have revealed that they are amongst the most frequently mutated genes associated with human cancers. MLL3 and MLL4 form identical multi-protein complexes for modifying mono-methylation of histone H3 lysine 4 (H3K4) at enhancers, which together with the p300/CBP-mediated H3K27 acetylation can generate an active enhancer landscape for long-range target gene activation. Recent studies have provided a better understanding of the possible mechanisms underlying the roles of MLL3/MLL4 complexes in enhancer regulation. Moreover, accumulating studies offer new insights into our knowledge of the potential role of MLL3/MLL4 in cancer development. In this review, we summarize recent evidence on the molecular mechanisms of MLL3/MLL4 in the regulation of active enhancer landscape and long-range gene expression, and discuss their clinical implications in human cancers.
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248
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Dhar SS, Lee MG. Cancer-epigenetic function of the histone methyltransferase KMT2D and therapeutic opportunities for the treatment of KMT2D-deficient tumors. Oncotarget 2021; 12:1296-1308. [PMID: 34194626 PMCID: PMC8238240 DOI: 10.18632/oncotarget.27988] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 06/01/2021] [Indexed: 12/27/2022] Open
Abstract
Epigenetic mechanisms are central to understanding the molecular basis underlying tumorigenesis. Aberrations in epigenetic modifiers alter epigenomic landscapes and play a critical role in tumorigenesis. Notably, the histone lysine methyltransferase KMT2D (a COMPASS/ Set1 family member; also known as MLL4, ALR, and MLL2) is among the most frequently mutated genes in many different types of cancer. Recent studies have demonstrated how KMT2D loss induces abnormal epigenomic reprograming and rewires molecular pathways during tumorigenesis. These findings also have clinical and therapeutic implications for cancer treatment. In this review, we summarize recent advances in understanding the role of KMT2D in regulating tumorigenesis and discuss therapeutic opportunities for the treatment of KMT2D-deficient tumors.
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Affiliation(s)
- Shilpa S Dhar
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Min Gyu Lee
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.,The Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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249
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Milpied P, Gandhi AK, Cartron G, Pasqualucci L, Tarte K, Nadel B, Roulland S. Follicular lymphoma dynamics. Adv Immunol 2021; 150:43-103. [PMID: 34176559 DOI: 10.1016/bs.ai.2021.05.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Follicular lymphoma (FL) is an indolent yet challenging disease. Despite a generally favorable response to immunochemotherapy regimens, a fraction of patients does not respond or relapses early with unfavorable prognosis. For the vast majority of those who initially respond, relapses will repeatedly occur with increasing refractoriness to available treatments. Addressing the clinical challenges in FL warrants deep understanding of the nature of treatment-resistant FL cells seeding relapses, and of the biological basis of early disease progression. Great progress has been made in the last decade in the description and interrogation of the (epi)genomic landscape of FL cells, of their major dependency to the tumor microenvironment (TME), and of the stepwise lymphomagenesis process, from healthy to subclinical disease and to overt FL. A new picture is emerging, in which an ever-evolving tumor-TME duo sparks a complex and multilayered clonal and functional heterogeneity, blurring the discovery of prognostic biomarkers, patient stratification and reliable designs of risk-adapted treatments. Novel technological approaches allowing to decipher both tumor and TME heterogeneity at the single-cell level are beginning to unravel unsuspected cell dynamics and plasticity of FL cells. The upcoming drawing of a comprehensive functional picture of FL within its ecosystem holds great promise to address the unmet medical needs of this complex lymphoma.
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Affiliation(s)
- Pierre Milpied
- Aix Marseille University, CNRS, INSERM, CIML, Marseille, France
| | - Anita K Gandhi
- Translational Medicine, Bristol Myers Squibb, Summit, NJ, United States
| | - Guillaume Cartron
- Department of Hematology, Centre Hospitalier Universitaire Montpellier, UMR-CNRS 5535, Montpellier, France
| | - Laura Pasqualucci
- Pathology and Cell Biology, Institute for Cancer Genetics, Columbia University, New York City, NY, United States
| | - Karin Tarte
- INSERM U1236, Univ Rennes, EFS Bretagne, CHU Rennes, Rennes, France
| | - Bertrand Nadel
- Aix Marseille University, CNRS, INSERM, CIML, Marseille, France.
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250
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Wienand K, Chapuy B. Molecular classification of aggressive lymphomas-past, present, future. Hematol Oncol 2021; 39 Suppl 1:24-30. [PMID: 34105819 DOI: 10.1002/hon.2847] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Indexed: 12/12/2022]
Abstract
Aggressive large B-cell lymphomas (LBCLs) represent a frequent but clinically and molecularly heterogeneous group of tumors. Technological advances over the last decades prompted the development of different classification schemas to either sharpen diagnoses, dissect molecular heterogeneity, predict outcome, or identify rational treatment targets. Despite increased diagnostic precision and a noticeably improved molecular understanding of these lymphomas, clinical perspectives of patients largely remain unchanged. Recently, finished comprehensive genomic studies discovered genetically defined LBCL subtypes that predict outcome, provide insight into lymphomagenesis, and suggest rational therapies with the hope of generating patient-tailored treatments with increased perspective for patients in greatest need. Current and future efforts integrate multiomics studies and/or leverage single-cell technologies and will provide us with an even more fine-grained picture of LBCL biology. Here, we highlight examples of how high-throughput technologies aided in a better molecular understanding of LBCLs and provide examples of how to select rationally designed targeted treatment approaches that might personalize LBCL treatment and eventually improve patients' perspective in the near future.
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Affiliation(s)
- Kirsty Wienand
- Department of Hematology and Medical Oncology, University Medical Center Göttingen, Göttingen, Germany
| | - Björn Chapuy
- Department of Hematology and Medical Oncology, University Medical Center Göttingen, Göttingen, Germany
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