1
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Hilton LK, Scott DW, Morin RD. Biological heterogeneity in diffuse large B-cell lymphoma. Semin Hematol 2023; 60:267-276. [PMID: 38151380 DOI: 10.1053/j.seminhematol.2023.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/19/2023] [Accepted: 11/28/2023] [Indexed: 12/29/2023]
Abstract
Diffuse large B-cell lymphoma (DLBCL) is heterogeneous both in clinical outcomes and the underlying disease biology. Over the last 2 decades, several different approaches for dissecting biological heterogeneity have emerged. Gene expression profiling (GEP) stratifies DLBCL into 3 broad groups (ABC, GCB, and DZsig/MHG), each with parallels to different normal mature B cell developmental states and prognostic implications. More recently, several different genomic approaches have been developed to categorize DLBCL based on the co-occurrence of tumor somatic mutations, identifying more granular biologically unified subgroups that complement GEP-based approaches. We review the molecular approaches and clinical evidence supporting the stratification of DLBCL patients based on tumor biology. By offering a platform for subtype-guided therapy, these divisions remain a promising avenue for improving patient outcomes, especially in subgroups with inferior outcomes with current standard-of-care therapy.
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Affiliation(s)
- Laura K Hilton
- BC Cancer Centre for Lymphoid Cancer, Vancouver, BC, Canada.; Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada.
| | - David W Scott
- BC Cancer Centre for Lymphoid Cancer, Vancouver, BC, Canada.; Division of Medical Oncology, Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Ryan D Morin
- BC Cancer Centre for Lymphoid Cancer, Vancouver, BC, Canada.; Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada; Canada's Michael Smith Genome Sciences Centre, BC Cancer Research Centre, Vancouver, BC, Canada
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2
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Zhao CC, Jiao Y, Zhang YY, Ning J, Zhang YR, Xu J, Wei W, Kang-Sheng G. Lnc SMAD5-AS1 as ceRNA inhibit proliferation of diffuse large B cell lymphoma via Wnt/β-catenin pathway by sponging miR-135b-5p to elevate expression of APC. Cell Death Dis 2019; 10:252. [PMID: 30874550 PMCID: PMC6420660 DOI: 10.1038/s41419-019-1479-3] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 02/07/2019] [Accepted: 02/21/2019] [Indexed: 12/16/2022]
Abstract
Diffuse large B cell lymphoma (DLBCL) is a common and fatal hematological malignancy. Long noncoding RNAs (lncRNAs) have emerged as crucial biomarkers and regulators in many cancers. Novel lncRNA biomarker in DLBCL needs to be investigated badly, as well as its function and molecular mechanism. To further explore, microarray analysis was performed to identify the differentially expressed lncRNAs in DLBCL tissues. To investigate the biological functions of SMAD5-AS1, we performed gain- and loss-of-function experiments in vitro and in vivo. Furthermore, bioinformatics analysis, dual-luciferase reporter assays, Argonaute 2-RNA immunoprecipitation (AGO2-RIP), RNA pull-down assay, quantitative PCR arrays, western blot assay, TOPFlash/FOPFlash reporter assay, and rescue experiments were conducted to explore the underlying mechanisms of competitive endogenous RNAs (ceRNAs). We found that SMAD5-AS1 was down-regulated in DLBCL tissues and cell lines. Functionally, SMAD5-AS1 downregulation promoted cell proliferation in vitro and in vivo, whereas SMAD5-AS1 overexpression could lead to the opposite effects in vitro and in vivo. Bioinformatics analysis and luciferase assays revealed that miR-135b-5p was a direct target of SMAD5-AS1, which was validated by dual-luciferase reporter assays, AGO2-RIP, RNA pull-down assay, and rescue experiments. Also, dual-luciferase reporter assays and rescue experiments demonstrated that miR-135b-5p targeted the adenomatous polyposis coli (APC) gene directly. SMAD5-AS1/miR-135b-5p inhibits the cell proliferation via inactivating the classic Wnt/β-catenin pathway in the form of APC dependency. Our results indicated that SMAD5-AS1 inhibits DLBCL proliferation by sponging miR-135b-5p to up-regulate APC expression and inactivate classic Wnt/β-catenin pathway, suggesting that SMAD5-AS1 may act as a potential biomarker and therapeutic target for DLBCL.
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Affiliation(s)
- Chen-Chen Zhao
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Yang Jiao
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Yi-Yin Zhang
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Jie Ning
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Yi-Ruo Zhang
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Jing Xu
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Wei Wei
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China.
| | - Gu Kang-Sheng
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China.
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3
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Robetorye RS, Ramsower CA, Rosenthal AC, Yip TK, Wendel Spiczka AJ, Glinsmann-Gibson BJ, Rimsza LM. Incorporation of Digital Gene Expression Profiling for Cell-of-Origin Determination (Lymph2Cx Testing) into the Routine Work-Up of Diffuse Large B-Cell Lymphoma. J Hematop 2019; 12:3-10. [PMID: 34447482 PMCID: PMC8386504 DOI: 10.1007/s12308-019-00344-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 01/31/2019] [Indexed: 12/13/2022] Open
Abstract
Diffuse large B-cell lymphomas (DLBCL) represent a clinically heterogeneous group of lymphomas that are classified together based on similarities in morphology and immunophenotype. Gene expression profiling further classifies DLBCL into distinct molecular subgroups based on cell-of-origin (COO), including Germinal Center B-cell type, Activated B-cell type, and Unclassified type. COO assignment of DLBCL has important biological and prognostic significance, as well as emerging therapeutic implications. Herein, we describe the first clinical validation of a digital gene expression profiling assay (Lymph2Cx) to perform COO assignment in the routine work-up of DLBCL using formalin-fixed paraffin-embedded (FFPE) tissue sections and describe the results of 90 consecutive DLBCL cases analyzed prospectively by a College of American Pathologists/Clinical Laboratory Improvement Amendments (CAP/CLIA)-certified clinical molecular diagnostics laboratory.
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Affiliation(s)
- Ryan S. Robetorye
- Molecular Diagnostics Laboratory Arizona (MDAZL), Department of Laboratory Medicine and Pathology, Mayo Clinic in Arizona, Scottsdale, AZ
| | - Colleen A. Ramsower
- Molecular Diagnostics Laboratory Arizona (MDAZL), Department of Laboratory Medicine and Pathology, Mayo Clinic in Arizona, Scottsdale, AZ
| | - Allison C. Rosenthal
- Division of Hematology and Oncology, Department of Internal Medicine, Mayo Clinic in Arizona, Phoenix, AZ
| | - Tameson K. Yip
- Molecular Diagnostics Laboratory Arizona (MDAZL), Department of Laboratory Medicine and Pathology, Mayo Clinic in Arizona, Scottsdale, AZ
| | - Amy J. Wendel Spiczka
- Molecular Diagnostics Laboratory Arizona (MDAZL), Department of Laboratory Medicine and Pathology, Mayo Clinic in Arizona, Scottsdale, AZ
| | - Betty J. Glinsmann-Gibson
- Molecular Diagnostics Laboratory Arizona (MDAZL), Department of Laboratory Medicine and Pathology, Mayo Clinic in Arizona, Scottsdale, AZ
| | - Lisa M. Rimsza
- Molecular Diagnostics Laboratory Arizona (MDAZL), Department of Laboratory Medicine and Pathology, Mayo Clinic in Arizona, Scottsdale, AZ
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Scott DW, Rimsza LM. Dissecting aggressive B-cell lymphoma through genomic analysis - What is clinically relevant? Best Pract Res Clin Haematol 2018; 31:187-198. [PMID: 30213388 DOI: 10.1016/j.beha.2018.07.003] [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: 05/23/2018] [Revised: 06/21/2018] [Accepted: 07/02/2018] [Indexed: 10/28/2022]
Abstract
The aggressive B-cell lymphomas are a diverse collection of cancers grouped together based on clinical behavior and derivation from B lymphocytes. Genomic analyses on these tumours are now translating into improved classification systems and identification of underpinning targetable biology. Simple karyotyping revealed key translocations involving MYC, BCL2, and BCL6 that have impacted lymphoma classification in the World Health Organization classification scheme. Subsequently, gene expression profiling identified molecular subgroups within the most common lymphoma, diffuse large B-cell lymphoma (DLBCL): activated B-cell-like and germinal centre B-cell-like. Finally, next generation sequencing has revealed a modest number of frequently mutated genes and a long list of infrequent mutations. The mutational landscapes involve diverse genes associated with dysregulated signalling, epigenetic modification, blockade of cellular differentiation, and immune evasion. These mutational "signatures" are enriched in the different aggressive lymphoma subtypes impacting phenotypes and identifying therapeutic targets. Challenges to implementing genomic assays into clinical practice remain.
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Affiliation(s)
- David W Scott
- Centre for Lymphoid Cancer, British Columbia Cancer, Vancouver, British Columbia, Canada; Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
| | - Lisa M Rimsza
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Scottsdale, AZ, USA
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5
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Hsi ED. 2016 WHO Classification update-What's new in lymphoid neoplasms. Int J Lab Hematol 2017; 39 Suppl 1:14-22. [DOI: 10.1111/ijlh.12650] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 01/25/2017] [Indexed: 12/18/2022]
Affiliation(s)
- E. D. Hsi
- Department of Laboratory Medicine; Cleveland Clinic; Cleveland OH USA
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6
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Ladetto M, Buske C, Hutchings M, Dreyling M, Gaidano G, Le Gouill S, Luminari S, Pott C, Zamò A, Zucca E. ESMO consensus conference on malignant lymphoma: general perspectives and recommendations for prognostic tools in mature B-cell lymphomas and chronic lymphocytic leukaemia. Ann Oncol 2016; 27:2149-2160. [PMID: 27701070 DOI: 10.1093/annonc/mdw419] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 08/11/2016] [Accepted: 08/23/2016] [Indexed: 01/02/2023] Open
Abstract
The European Society for Medical Oncology (ESMO) consensus conference on mature B-cell lymphomas and chronic lymphocytic leukaemia (CLL) was held on 20 June 2015 in Lugano, Switzerland, and included a multidisciplinary panel of 25 leading experts. The aim of the conference was to develop recommendations on critical subjects difficult to consider in detail in the ESMO Clinical Practice Guidelines. The following areas were identified: (i) the elderly patient, (ii) prognostic factors suitable for clinical use and (iii) the 'ultra-high-risk' group. Before the conference, the expert panel was divided into three working groups; each group focused on one of these areas in order to address four clinically relevant questions relating to that topic. All relevant scientific literature, as identified by the experts, was reviewed in advance. During the consensus conference, each working group developed recommendations to address each of the four questions assigned to their group. These recommendations were then presented to the entire panel and a consensus was reached. This manuscript presents recommendations dedicated to the second area of interest, i.e. prognostic factors suitable for clinical use. The four topics [i.e. interim positron emission tomography (PET), TP53 mutations, cell of origin (COO) and minimal residual disease (MRD)] were primarily chosen because of the bulk of available data together with the lack of clear guidance regarding their use in clinical practice and within clinical trials. Results, including a summary of evidence supporting each recommendation, are detailed in this manuscript. The panel acknowledged that detection of TP53 inactivation by deletion or mutation in CLL should be implemented in clinical practice (level of evidence I, strength of recommendation A). Due to their potentially high prognostic value, at least in some lymphoma entities, implementation of interim PET, COO and MRD was highly recommended in the context of clinical trials. All expert panel members approved this final article.
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Affiliation(s)
- M Ladetto
- Hematology Division, Azienda Ospedaliera Santi Antonio e Biagio e Cesare Arrigo, Alessandria, Italy
| | - C Buske
- Comprehensive Cancer Center Ulm and Department of Internal Medicine III, Institute of Experimental Cancer Research, University Hospital, Ulm, Germany
| | - M Hutchings
- Department of Hematology, Rigshospitalet, Copenhagen, Denmark
| | - M Dreyling
- Medizinische Klinik III, Klinikum der Universität München/LMU, Munich, Germany
| | - G Gaidano
- Division of Hematology, Department of Translational Medicine, Amedeo Avogadro University of Eastern Piedmont, Novara, Italy
| | - S Le Gouill
- Clinical Hematology, Centre Hospitalo-Universitaire de Nantes, UMR892 Team 10, CIC Nantes, France
| | - S Luminari
- Hematology, Arcispedale S. Maria Nuova, IRCCS Reggio Emilia.,Department of Diagnostic, Clinical and Public Health Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - C Pott
- Second Medical Department, University Hospital Schleswig-Holstein, Kiel, Germany
| | - A Zamò
- Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - E Zucca
- Lymphoma Unit, Oncology Institute of Southern Switzerland, Ospedale San Giovanni, Bellinzona, Switzerland
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7
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Sun R, Medeiros LJ, Young KH. Diagnostic and predictive biomarkers for lymphoma diagnosis and treatment in the era of precision medicine. Mod Pathol 2016; 29:1118-42. [PMID: 27363492 DOI: 10.1038/modpathol.2016.92] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 04/13/2016] [Accepted: 04/14/2016] [Indexed: 02/07/2023]
Abstract
Lymphomas are a group of hematological malignancies derived from lymphocytes. Lymphomas are clinically and biologically heterogeneous and have overlapping diagnostic features. With the advance of new technologies and the application of efficient and feasible detection platforms, an unprecedented number of novel biomarkers have been discovered or are under investigation at the genetic, epigenetic, and protein level as well as the tumor microenvironment. These biomarkers have enabled new clinical and pathological insights into the mechanisms underlying lymphomagenesis and also have facilitated improvements in the diagnostic workup, sub-classification, outcome stratification, and personalized therapy for lymphoma patients. However, integrating these biomarkers into clinical practice effectively and precisely in daily practice is challenging. More in-depth studies are required to further validate these novel biomarkers and to assess other parameters that can affect the reproducibility of these biomarkers such as the selection of detection methods, biological reagents, interpretation of data, and cost efficiency. Despite these challenges, there are many reasons to be optimistic that novel biomarkers will facilitate better algorithms and strategies as we enter a new era of precision medicine to better refine diagnosis, prognostication, and rational treatment design for patients with lymphomas.
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Affiliation(s)
- Ruifang Sun
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Pathology, Shanxi Cancer Hospital, Shanxi, China
| | - L Jeffrey Medeiros
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ken H Young
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,The University of Texas Graduate School of Biomedical Science, Houston, TX, USA
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Araf S, Korfi K, Rahim T, Davies A, Fitzgibbon J. Advances in the molecular diagnosis of diffuse large B-cell lymphoma in the era of precision medicine. Expert Rev Mol Diagn 2016; 16:1093-1102. [PMID: 27648481 DOI: 10.1080/14737159.2016.1235974] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
INTRODUCTION The adoption of high-throughput technologies has led to a transformation in our ability to classify diffuse large B-cell lymphoma (DLBCL) into unique molecular subtypes. In parallel, the expansion of agents targeting key genetic and gene expression signatures has led to an unprecedented opportunity to personalize cancer therapies, paving the way for precision medicine. Areas covered: This review summarizes the key molecular subtypes of DLBCL and outlines the novel technology platforms in development to discriminate clinically relevant subtypes. Expert commentary: The application of emerging diagnostic tests into routine clinical practise is gaining momentum following the demonstration of subtype specific activity by novel agents. Co-ordinated efforts are required to ensure that these state of the art technologies provide reliable and clinically meaningful results accessible to the wider haematology community.
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MESH Headings
- Biomarkers, Tumor
- Gene Expression
- Genes, bcl-2
- Genes, myc
- High-Throughput Nucleotide Sequencing
- Humans
- Lymphoma, Large B-Cell, Diffuse/diagnosis
- Lymphoma, Large B-Cell, Diffuse/genetics
- Lymphoma, Large B-Cell, Diffuse/mortality
- Lymphoma, Large B-Cell, Diffuse/therapy
- Molecular Diagnostic Techniques
- Mutation
- Precision Medicine/methods
- Prognosis
- Transcriptome
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Affiliation(s)
- Shamzah Araf
- a Centre for Haemato-Oncology , Barts Cancer Institute, Queen Mary University of London , London , UK
| | - Koorosh Korfi
- a Centre for Haemato-Oncology , Barts Cancer Institute, Queen Mary University of London , London , UK
| | - Tahrima Rahim
- a Centre for Haemato-Oncology , Barts Cancer Institute, Queen Mary University of London , London , UK
| | - Andrew Davies
- b Cancer Sciences Unit, Faculty of Medicine , University of Southampton , Southampton , UK
| | - Jude Fitzgibbon
- a Centre for Haemato-Oncology , Barts Cancer Institute, Queen Mary University of London , London , UK
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9
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Hong JY, Suh C, Kim WS. Evolution of frontline treatment of diffuse large B-cell lymphoma: a brief review and recent update. F1000Res 2016; 5. [PMID: 27606052 PMCID: PMC4979644 DOI: 10.12688/f1000research.8790.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/04/2016] [Indexed: 12/22/2022] Open
Abstract
Various strategies have been implemented to improve the outcomes of diffuse large B-cell lymphoma (DLBCL). In recent years, remarkable advances have been achieved, based on the discovery of cell-of-origin in DLBCL and on more effective targeted agents. This commentary will summarize recent updates on the evolution of frontline therapies for DLBCL, focusing on the upcoming promising frontline chemotherapy platforms and on activated B-cell subtype DLBCL and double-hit DLBCL.
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Affiliation(s)
- Jung Yong Hong
- Department of Oncology, Asan Medical Centre, University of Ulsan, Seoul, 05505, Korea, South
| | - Cheolwon Suh
- Department of Oncology, Asan Medical Centre, University of Ulsan, Seoul, 05505, Korea, South
| | - Won Seog Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Centre, Sungkyunkwan University, Seoul, 135-710, Korea, South
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10
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Clinical approach to diffuse large B cell lymphoma. Blood Rev 2016; 30:477-491. [PMID: 27596109 DOI: 10.1016/j.blre.2016.06.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 05/26/2016] [Accepted: 06/20/2016] [Indexed: 12/19/2022]
Abstract
Diffuse large B cell lymphoma (DLBCL) is the most common subtype of lymphoma. We now recognize that DLBCL corresponds to a biologically heterogeneous family of diseases. Given the potential for cure for most DLBCL patients, appropriate diagnostic and staging evaluation and therapy are essential. Here we review areas of consensus as well as controversy in the evaluation, treatment and monitoring of patients with DLBCL and its related subtypes.
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Abstract
High-grade B-cell lymphomas (HGBCLs) are a heterogeneous group of neoplasms that include subsets of diffuse large B-cell lymphoma, Burkitt lymphoma, and lymphomas with features intermediate between diffuse large B-cell lymphoma and Burkitt lymphoma. Morphologically indistinguishable HGBCLs may demonstrate variable clinical courses and responses to therapy. The morphologic evaluation and classification of these neoplasms must be followed by further genetic and immunophenotypic work-up. These additional diagnostic modalities lead to a comprehensive stratification of HGBCL that determines the prognosis and optimal therapy. This article reviews the well-established and emerging biomarkers that are most relevant to the clinical management of HGBCL.
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MESH Headings
- Biomarkers, Tumor/metabolism
- Burkitt Lymphoma/diagnosis
- Burkitt Lymphoma/genetics
- Burkitt Lymphoma/pathology
- Gene Rearrangement
- Humans
- Lymphoma, B-Cell/diagnosis
- Lymphoma, B-Cell/genetics
- Lymphoma, B-Cell/pathology
- Lymphoma, Large B-Cell, Diffuse/diagnosis
- Lymphoma, Large B-Cell, Diffuse/genetics
- Lymphoma, Large B-Cell, Diffuse/pathology
- Neoplasm Grading
- Proto-Oncogene Proteins c-bcl-2/genetics
- Proto-Oncogene Proteins c-bcl-2/metabolism
- Proto-Oncogene Proteins c-myc/genetics
- Proto-Oncogene Proteins c-myc/metabolism
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Affiliation(s)
- Amir Behdad
- Division of Hematopathology, Department of Pathology, Northwestern Memorial Hospital, Northwestern University, Feinberg School of Medicine, 251 East Huron, Feinberg 7-210, Chicago, IL 60611, USA.
| | - Nathanael G Bailey
- Division of Hematopathology, Department of Pathology, University of Michigan, 5242 Med Sci I, 1301 Catherine Street, Ann Arbor, MI 48109, USA
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Scott DW. Cell-of-Origin in Diffuse Large B-Cell Lymphoma: Are the Assays Ready for the Clinic? Am Soc Clin Oncol Educ Book 2016:e458-66. [PMID: 25993210 DOI: 10.14694/edbook_am.2015.35.e458] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Diffuse large B-cell lymphoma (DLBCL) is the most common lymphoma worldwide and consists of a heterogeneous group of cancers classified together on the basis of shared morphology, immunophenotype, and aggressive clinical behavior. It is now recognized that this malignancy comprises at least two distinct molecular subtypes identified by gene expression profiling: the activated B-cell-like (ABC) and the germinal center B-cell-like (GCB) groups-the cell-of-origin (COO) classification. These two groups have different genetic mutation landscapes, pathobiology, and outcomes following treatment. Evidence is accumulating that novel agents have selective activity in one or the other COO group, making COO a predictive biomarker. Thus, there is now a pressing need for accurate and robust methods to assign COO, to support clinical trials, and ultimately guide treatment decisions for patients. The "gold standard" methods for COO are based on gene expression profiling (GEP) of RNA from fresh frozen tissue using microarray technology, which is an impractical solution when formalin-fixed paraffin-embedded tissue (FFPET) biopsies are the standard diagnostic material. This review outlines the history of the COO classification before examining the practical implementation of COO assays applicable to FFPET biopsies. The immunohistochemistry (IHC)-based algorithms and gene expression-based assays suitable for the highly degraded RNA from FFPET are discussed. Finally, the technical and practical challenges that still need to be addressed are outlined before robust gene expression-based assays are used in the routine management of patients with DLBCL.
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Affiliation(s)
- David W Scott
- From the Centre for Lymphoid Cancer, BC Cancer Agency, Vancouver, British Columbia, Canada; Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
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13
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Clark Schneider KM, Banks PM, Collie AMB, Lanigan CP, Manilich E, Durkin LM, Hill BT, Hsi ED. Dual expression of MYC and BCL2 proteins predicts worse outcomes in diffuse large B-cell lymphoma. Leuk Lymphoma 2015; 57:1640-8. [DOI: 10.3109/10428194.2015.1101099] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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14
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Abstract
Abstract
The diffuse aggressive large B-cell lymphomas are a heterogeneous group of B-cell malignancies. Although many are readily recognized due to characteristic clinical and pathologic features, several problematic areas still exist in diagnosis of these lymphomas due to a variety of reasons that include imprecise or difficult-to-apply diagnostic criteria, gaps in our understanding of lymphoma biology, and limitations in technologies available in the clinical laboratory compared to the research laboratory. This may result in some degree of confusion in the pathology report, particularly if the issues are not clearly explained, leading to frustration or misinterpretation on the part of the reader. In this review, I will discuss the pathologic features of a subset of the WHO 2008 classification diffuse aggressive large B-cell lymphomas, focusing on areas in which difficulties exist in diagnosis and/or biomarker marker assessment. A deeper understanding of the issues and areas of uncertainty due to limitations in our knowledge about the biology of these diseases should lead to better communication between pathologists and clinicians.
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15
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Wong KK, Ch'ng ES, Loo SK, Husin A, Muruzabal MA, Møller MB, Pedersen LM, Pomposo MP, Gaafar A, Banham AH, Green TM, Lawrie CH. Low HIP1R mRNA and protein expression are associated with worse survival in diffuse large B-cell lymphoma patients treated with R-CHOP. Exp Mol Pathol 2015; 99:537-45. [DOI: 10.1016/j.yexmp.2015.08.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 08/31/2015] [Indexed: 10/23/2022]
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Abstract
The diagnosis of B-cell non-Hodgkin lymphomas has changed significantly over the past few decades as new immunophenotypic markers, molecular subtype classification schemes, and novel biomarkers have emerged. Meanwhile, there has been an increasing emphasis on individualizing treatment approaches in accordance with a biologic heterogeneity that has been uncovered within many of the individual B-cell lymphoma entities. The application of high-throughput genomic sequencing to B-cell lymphomas has yielded large amounts of valuable information. The data encompass discoveries essential to an understanding of pathogenesis, clonal or tumoral evolution, and identification of biomarkers that may be useful for prognostic or therapeutic considerations. The following review discusses several of the more common, primarily tissuebased B-cell lymphomas, with a focus on pathologic classification and certain phenotypic characteristics or genetic lesions that apply to refinement of diagnosis and therapy.
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MESH Headings
- Biomarkers, Tumor
- High-Throughput Nucleotide Sequencing
- Humans
- Lymphoma, B-Cell/diagnosis
- Lymphoma, B-Cell/genetics
- Lymphoma, B-Cell/pathology
- Lymphoma, Follicular/diagnosis
- Lymphoma, Follicular/genetics
- Lymphoma, Follicular/pathology
- Lymphoma, Mantle-Cell/diagnosis
- Lymphoma, Mantle-Cell/genetics
- Lymphoma, Mantle-Cell/pathology
- Mutation
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Affiliation(s)
- Sarah L Ondrejka
- Cleveland Clinic-Robert J. Tomsich Pathology and Laboratory Medicine Institute, 9500 Euclid Ave, L3, Cleveland, OH, 44195, USA
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