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El-Sharkawi D, Dearden C. Prolymphocytic Leukaemia: an Update on Biology and Treatment. Curr Oncol Rep 2024; 26:129-135. [PMID: 38214879 DOI: 10.1007/s11912-023-01485-3] [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] [Accepted: 12/14/2023] [Indexed: 01/13/2024]
Abstract
PURPOSE OF REVIEW This review summarises the recent advances in knowledge regarding the biology and treatment of prolymphocytic leukaemias. RECENT FINDINGS Both B-PLL and T-PLL are genetically complex, and the molecular landscape of these diseases has been well characterised recently. Diagnostic criteria for T-PLL have been refined with the publication of the first international consensus criteria, whereas the diagnosis of B-PLL has been thrown into question by the most recent WHO classification. Treatment advances in B-PLL have relied heavily on the advances seen in CLL that have then been extrapolated to B-PLL with just a few case reports to support the use of these targeted inhibitors. Despite increased knowledge of the biology of T-PLL and some elegant pre-clinical models to identify potential treatments, unfortunately, no improvements have been made in the treatment of T-PLL. Unmet need is a term oft used for many diseases, but this is particularly true for patients with prolymphocytic leukaemias. Ongoing improvements in our understanding of these diseases will hopefully lead to improved therapies in the future.
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Affiliation(s)
- Dima El-Sharkawi
- Royal Marsden NHS Foundation Trust, London, UK.
- Institute of Cancer Research, London, UK.
| | - Claire Dearden
- Royal Marsden NHS Foundation Trust, London, UK
- Institute of Cancer Research, London, UK
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2
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Braun T, Klepzig H, Herling M. AGO2 in T-prolymphocytic leukemia: its canonical and non-canonical deregulation and function. Oncotarget 2023; 14:395-397. [PMID: 37141408 PMCID: PMC10159368 DOI: 10.18632/oncotarget.28378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Indexed: 05/06/2023] Open
Affiliation(s)
| | | | - Marco Herling
- Correspondence to:Marco Herling, Department I of Internal Medicine, Center for Integrated Oncology (CIO), Aa-chen-Bonn-Cologne-Duesseldorf, University of Cologne, Cologne, Germany; Department of Hematology, Cellular Therapy, and Hemostaseology, University of Leipzig, Leipzig, Germany email
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3
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Otte M, Stachelscheid J, Glaß M, Wahnschaffe L, Jiang Q, Lone W, Ianevski A, Aittokallio T, Iqbal J, Hallek M, Hüttelmaier S, Schrader A, Braun T, Herling M. The miR-141/200c-STAT4 Axis Contributes to Leukemogenesis by Enhancing Cell Proliferation in T-PLL. Cancers (Basel) 2023; 15:2527. [PMID: 37173993 PMCID: PMC10177500 DOI: 10.3390/cancers15092527] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/17/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023] Open
Abstract
T-prolymphocytic leukemia (T-PLL) is a rare and mature T-cell malignancy with characteristic chemotherapy-refractory behavior and a poor prognosis. Molecular concepts of disease development have been restricted to protein-coding genes. Recent global microRNA (miR) expression profiles revealed miR-141-3p and miR-200c-3p (miR-141/200c) as two of the highest differentially expressed miRs in T-PLL cells versus healthy donor-derived T cells. Furthermore, miR-141/200c expression separates T-PLL cases into two subgroups with high and low expression, respectively. Evaluating the potential pro-oncogenic function of miR-141/200c deregulation, we discovered accelerated proliferation and reduced stress-induced cell death induction upon stable miR-141/200c overexpression in mature T-cell leukemia/lymphoma lines. We further characterized a miR-141/200c-specific transcriptome involving the altered expression of genes associated with enhanced cell cycle transition, impaired DNA damage responses, and augmented survival signaling pathways. Among those genes, we identified STAT4 as a potential miR-141/200c target. Low STAT4 expression (in the absence of miR-141/200c upregulation) was associated with an immature phenotype of primary T-PLL cells as well as with a shortened overall survival of T-PLL patients. Overall, we demonstrate an aberrant miR-141/200c-STAT4 axis, showing for the first time the potential pathogenetic implications of a miR cluster, as well as of STAT4, in the leukemogenesis of this orphan disease.
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Affiliation(s)
- Moritz Otte
- Department I of Internal Medicine, Center for Integrated Oncology, Aachen-Bonn-Cologne-Duesseldorf, University of Cologne, 50937 Cologne, Germany; (M.O.); (J.S.); (L.W.); (M.H.); (A.S.); (T.B.)
| | - Johanna Stachelscheid
- Department I of Internal Medicine, Center for Integrated Oncology, Aachen-Bonn-Cologne-Duesseldorf, University of Cologne, 50937 Cologne, Germany; (M.O.); (J.S.); (L.W.); (M.H.); (A.S.); (T.B.)
| | - Markus Glaß
- Section for Molecular Cell Biology, Institute of Molecular Medicine, Faculty of Medicine, Martin Luther University Halle-Wittenberg, Charles Tanford Protein Center, 06120 Halle, Germany; (M.G.)
| | - Linus Wahnschaffe
- Department I of Internal Medicine, Center for Integrated Oncology, Aachen-Bonn-Cologne-Duesseldorf, University of Cologne, 50937 Cologne, Germany; (M.O.); (J.S.); (L.W.); (M.H.); (A.S.); (T.B.)
| | - Qu Jiang
- Department of Hematology, Cellular Therapy, and Hemostaseology, University of Leipzig, 04103 Leipzig, Germany;
| | - Waseem Lone
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (W.L.); (J.I.)
| | - Aleksandr Ianevski
- Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, 00014 Helsinki, Finland; (A.I.); (T.A.)
| | - Tero Aittokallio
- Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, 00014 Helsinki, Finland; (A.I.); (T.A.)
- Institute for Cancer Research, Oslo University Hospital, Oslo Centre for Biostatistics and Epidemiology (OCBE), University of Oslo, 0372 Oslo, Norway
| | - Javeed Iqbal
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (W.L.); (J.I.)
| | - Michael Hallek
- Department I of Internal Medicine, Center for Integrated Oncology, Aachen-Bonn-Cologne-Duesseldorf, University of Cologne, 50937 Cologne, Germany; (M.O.); (J.S.); (L.W.); (M.H.); (A.S.); (T.B.)
- Excellence Cluster for Cellular Stress Response and Aging-Associated Diseases, Center for Molecular Medicine Cologne, University of Cologne, 50937 Cologne, Germany
| | - Stefan Hüttelmaier
- Section for Molecular Cell Biology, Institute of Molecular Medicine, Faculty of Medicine, Martin Luther University Halle-Wittenberg, Charles Tanford Protein Center, 06120 Halle, Germany; (M.G.)
| | - Alexandra Schrader
- Department I of Internal Medicine, Center for Integrated Oncology, Aachen-Bonn-Cologne-Duesseldorf, University of Cologne, 50937 Cologne, Germany; (M.O.); (J.S.); (L.W.); (M.H.); (A.S.); (T.B.)
- CIRI, Centre International de Recherche en Infectiologie, Team Lymphoma ImmunoBiology, INSERM, U1111 CNRS UMR 5308, University of Lyon, Université Claude Bernard Lyon 1, 69364 Lyon, France
| | - Till Braun
- Department I of Internal Medicine, Center for Integrated Oncology, Aachen-Bonn-Cologne-Duesseldorf, University of Cologne, 50937 Cologne, Germany; (M.O.); (J.S.); (L.W.); (M.H.); (A.S.); (T.B.)
| | - Marco Herling
- Department of Hematology, Cellular Therapy, and Hemostaseology, University of Leipzig, 04103 Leipzig, Germany;
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4
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Dai K, Wang C, Yao W, Hao C. Expression level and function analysis of serum miRNAs in workers with occupational exposure to benzene series. CHEMOSPHERE 2023; 313:137460. [PMID: 36473519 DOI: 10.1016/j.chemosphere.2022.137460] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 11/25/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Benzene series are ubiquitous in industrial production and daily life, and can have an impact on health even at low concentrations. miRNAs have been proved to be a biomarker of a variety of diseases and carcinogens. The purpose of this study was to explore the distribution characteristics and biological function of miRNAs in subjects exposed to benzene series. In this study, serum miRNAs were measured in 247 occupationally exposed subjects and 256 controls. The relationship between cumulative exposure dose of benzene series and miRNAs was analyzed by Generalized linear model, Spearman's rank correlation, and chi-square test for trend. The function of MiRNAs target gene was analyzed by means of bioinformatics method. The results showed that the expressions of miR-181a-5p, 221-3p, 223-3p, and 342-3p were down-regulated, whilst the expression of miR-638 was up-regulated in the occupational exposure group. miR-181a-5p, 221-3p, 223-3p, 342-3p, and 638 showed dose-response relationship with benzene series, and were closely related to multiple tumor pathways. miR-181a-5p, 221-3p, 223-3p, 342-3p, and 638 may be involved in the carcinogenic process of benzene series, and can be used to evaluate the early biological effects and monitor the exposure level of benzene series. miRNAs are potential biomarkers of benzene series exposure.
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Affiliation(s)
- Kai Dai
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Chen Wang
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Wu Yao
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, 450001, Henan, China
| | - Changfu Hao
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou, 450001, Henan, China.
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5
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Xie W, Yang J, Zhou N, Ding H, Zhou G, Wu S, Guo S, Li W, Zhang L, Yang H, Mao C, Zheng Y. Identification of microRNA editing sites in three subtypes of leukemia. Front Mol Biosci 2022; 9:1014288. [PMID: 36452459 PMCID: PMC9702332 DOI: 10.3389/fmolb.2022.1014288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/28/2022] [Indexed: 09/15/2023] Open
Abstract
Leukemia is an aberrant hyper-proliferation of immature blood cells that do not form solid tumors. The transcriptomes of microRNAs (miRNAs) of leukemia have been intensively explored. However, miRNA editing of leukemia has not been extensively studied. To identify miRNA editing patterns and explore their functional relevance in leukemia, we analyzed 200 small RNA sequencing profiles of three subtypes of leukemia and identified hundreds of miRNA editing sites in three subtypes of leukemia. Then, we compared the editing levels of identified miRNA editing sites in leukemia and normal controls. Many miRNAs were differential edited in different subtypes of leukemia. We also found the editing levels of 3'-A editing sites of hsa-mir-21-5p and hsa-mir-155-5p decreased in chronic lymphocytic leukemia patients with radiation treatments. By integrating PAR-CLIP sequencing profiles, we predicted the targets of original and edited miRNAs. One of the edited miRNA, hsa-let-7b_5c, with an additional cytosine at 5' end of hsa-let-7b-5p, potentially targeted VBP1 and CTDSP1. CTDSP1 was significantly downregulated in T-ALL compared to normal controls, which might be originated from the hyperediting of hsa-let-7b-5p in T-ALL. Our study provides a comprehensive view of miRNA editing in three different subtypes of leukemia.
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Affiliation(s)
- Wenping Xie
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
- State Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Jun Yang
- Yunnan Police College, Kunming, Yunnan, China
| | - Nan Zhou
- Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Hao Ding
- Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Guangchen Zhou
- Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Shuai Wu
- State Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Shiyong Guo
- State Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Wanran Li
- State Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Lei Zhang
- State Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Huaide Yang
- Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Chunyi Mao
- State Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Yun Zheng
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
- State Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, Yunnan, China
- Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, Yunnan, China
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, Yunnan, China
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6
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Braun T, Stachelscheid J, Bley N, Oberbeck S, Otte M, Müller TA, Wahnschaffe L, Glaß M, Ommer K, Franitza M, Gathof B, Altmüller J, Hallek M, Auguin D, Hüttelmaier S, Schrader A, Herling M. Non-canonical function of AGO2 augments T-cell receptor signaling in T-cell prolymphocytic leukemia. Cancer Res 2022; 82:1818-1831. [PMID: 35259248 DOI: 10.1158/0008-5472.can-21-1908] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 01/23/2022] [Accepted: 03/04/2022] [Indexed: 11/16/2022]
Abstract
T-cell prolymphocytic leukemia (T-PLL) is a chemotherapy-refractory T-cell malignancy with limited therapeutic options and a poor prognosis. Current disease concepts implicate TCL1A oncogene-mediated enhanced T-cell receptor (TCR) signaling and aberrant DNA repair as central perturbed pathways. We discovered that recurrent gains on chromosome 8q more frequently involve the AGO2 gene than the adjacent MYC locus as the affected minimally amplified genomic region. AGO2 has been understood as a pro-tumorigenic key regulator of microRNA (miR) processing. In primary tumor material and cell line models, AGO2 overrepresentation associated (i) with higher disease burden, (ii) with enhanced in vitro viability and growth of leukemic T-cells, and (iii) with miR-omes and transcriptomes that highlight altered survival signaling, abrogated cell cycle control, and defective DNA damage responses. Moreover, AGO2 elicited immediate, rather than non-RNA mediated, effects in leukemic T-cells. Systems of genetically modulated AGO2 revealed that it enhances TCR signaling, particularly at the level of ZAP70, PLCγ1, and LAT kinase phospho-activation. In global mass-spectrometric analyses, AGO2 interacted with a unique set of partners in a TCR-stimulated context, including the TCR kinases LCK and ZAP70, forming membranous protein complexes. Models of their three-dimensional structure also suggested that AGO2 undergoes post-transcriptional modi-fications by LCK. This novel TCR-associated non-canonical function of AGO2 represents, in addition to TCL1A-mediated TCR signal augmentation, another enhancer mechanism of this important deregulated growth pathway in T-PLL. These findings further emphasize TCR signaling intermediates as candidates for therapeutic targeting.
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Affiliation(s)
| | | | | | | | | | | | - Linus Wahnschaffe
- Department I of Internal Medicine, Center for Integrated Oncology (CIO) Aachen-Bonn-Cologne-Duesseldorf (ABCD), Cologne Cluster of Excellence in Cellular Stress Response and Aging-Associated Diseases (CECAD), and Center of Molecular Medicine Cologne (CMMC), at the University of Cologne, Germany
| | - Markus Glaß
- Martin Luther University, Halle (Saale), Germany
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7
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Patil P, Hillebrecht S, Chteinberg E, López C, Toprak UH, Seufert J, Bernhart SH, Kretzmer H, Bergmann AK, Bens S, Högel J, Scheffold A, Chelliah Jebaraj BM, Schrader A, Johansson P, Costa D, Schlesner M, Dürig J, Herling M, Campo E, Stilgenbauer S, Wiehle L, Siebert R. T-cell prolymphocytic leukemia is associated with deregulation of oncogenic microRNAs on transcriptional and epigenetic level. Genes Chromosomes Cancer 2022; 61:432-436. [PMID: 35218115 DOI: 10.1002/gcc.23034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 02/14/2022] [Accepted: 02/15/2022] [Indexed: 11/09/2022] Open
Abstract
Deregulation of micro(mi)-RNAs is a common mechanism in tumorigenesis. We investigated the expression of 2083 miRNAs in T-cell prolymphocytic leukemia (T-PLL). Compared to physiologic CD4+ and CD8+ T-cell subsets, 111 miRNAs were differentially expressed in T-PLL. Of these, 33 belonged to miRNA gene clusters linked to cancer. Genomic variants affecting miRNAs were infrequent with the notable exception of copy number aberrations. Remarkably, we found strong upregulation of the miR-200c/-141 cluster in T-PLL to be associated with DNA hypomethylation and active promoter marks. Our findings suggest that copy number aberrations and epigenetic changes could contribute to miRNA deregulation in T-PLL. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Paurnima Patil
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Sina Hillebrecht
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Emil Chteinberg
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Cristina López
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany.,Institute for Human Genetics, Christian-Albrechts-University Kiel and University Hospital Schleswig-Holstein, Kiel, Germany.,Haematopathology Section, Hospital Clínic, Institut d'Investigaciones Biomèdiques August Pi I Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Umut H Toprak
- Bioinformatics and Omics Data Analytics, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Faculty of Biosciences, Heidelberg University, Heidelberg, Germany.,Division Neuroblastoma Genomics, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Hopp-Children's Cancer Center at the NCT Heidelberg (KiTZ), Heidelberg, Germany
| | - Julian Seufert
- Bioinformatics and Omics Data Analytics, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
| | - Stephan H Bernhart
- Interdisciplinary Center for Bioinformatics, Transcriptome Bioinformatics, University of Leipzig, Germany
| | - Helene Kretzmer
- Interdisciplinary Center for Bioinformatics, Transcriptome Bioinformatics, University of Leipzig, Germany
| | - Anke K Bergmann
- Institute for Human Genetics, Christian-Albrechts-University Kiel and University Hospital Schleswig-Holstein, Kiel, Germany.,Institute for Human Genetics, Hannover Medical School, Hannover, Germany
| | - Susanne Bens
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany.,Institute for Human Genetics, Christian-Albrechts-University Kiel and University Hospital Schleswig-Holstein, Kiel, Germany
| | - Josef Högel
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Annika Scheffold
- Department of Internal Medicine III, University of Ulm, Ulm, Germany
| | | | - Alexandra Schrader
- Department of Internal Medicine, Center for Integrated Oncology Köln Bonn, Deutsche CLL Study Group (DCLLSG), University of Cologne, Cologne, Germany
| | - Patricia Johansson
- Institute for Cell Biology (Cancer Research), Medical Faculty, University of Duisburg-Essen, Essen, Germany
| | - Dolors Costa
- Haematopathology Section, Hospital Clínic, Institut d'Investigaciones Biomèdiques August Pi I Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Matthias Schlesner
- Bioinformatics and Omics Data Analytics, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Biomedical Informatics, Data Mining and Data Analytics, Faculty of Applied Informatics and Medical Faculty, Augsburg University, Augsburg, Germany
| | - Jan Dürig
- Department of Hematology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Marco Herling
- Department of Internal Medicine, Center for Integrated Oncology Köln Bonn, Deutsche CLL Study Group (DCLLSG), University of Cologne, Cologne, Germany.,Clinic of Hematology, Cellular Therapy and Hemostaseology, University of Leipzig, Leipzig, Germany
| | - Elias Campo
- Haematopathology Section, Hospital Clínic, Institut d'Investigaciones Biomèdiques August Pi I Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | | | - Laura Wiehle
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Reiner Siebert
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany.,Institute for Human Genetics, Christian-Albrechts-University Kiel and University Hospital Schleswig-Holstein, Kiel, Germany
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8
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Braun T, Dechow A, Friedrich G, Seifert M, Stachelscheid J, Herling M. Advanced Pathogenetic Concepts in T-Cell Prolymphocytic Leukemia and Their Translational Impact. Front Oncol 2021; 11:775363. [PMID: 34869023 PMCID: PMC8639578 DOI: 10.3389/fonc.2021.775363] [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: 09/13/2021] [Accepted: 10/18/2021] [Indexed: 12/29/2022] Open
Abstract
T-cell prolymphocytic leukemia (T-PLL) is the most common mature T-cell leukemia. It is a typically aggressively growing and chemotherapy-resistant malignancy with a poor prognosis. T-PLL cells resemble activated, post-thymic T-lymphocytes with memory-type effector functions. Constitutive transcriptional activation of genes of the T-cell leukemia 1 (TCL1) family based on genomic inversions/translocations is recognized as a key event in T-PLL's pathogenesis. TCL1's multiple effector pathways include the enhancement of T-cell receptor (TCR) signals. New molecular dependencies around responses to DNA damage, including repair and apoptosis regulation, as well as alterations of cytokine and non-TCR activation signaling were identified as perturbed hallmark pathways within the past years. We currently witness these vulnerabilities to be interrogated in first pre-clinical concepts and initial clinical testing in relapsed/refractory T-PLL patients. We summarize here the current knowledge on the molecular understanding of T-PLL's pathobiology and critically assess the true translational progress around this to help appraisal by caregivers and patients. Overall, the contemporary concepts on T-PLL's pathobiology are condensed in a comprehensive mechanistic disease model and promising interventional strategies derived from it are highlighted.
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Affiliation(s)
- Till Braun
- Department I of Internal Medicine, Center for Integrated Oncology (CIO), Aachen-Bonn-Cologne-Duesseldorf, Excellence Cluster for Cellular Stress Response and Aging-Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC), University of Cologne (UoC), Cologne, Germany
| | - Annika Dechow
- Department I of Internal Medicine, Center for Integrated Oncology (CIO), Aachen-Bonn-Cologne-Duesseldorf, Excellence Cluster for Cellular Stress Response and Aging-Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC), University of Cologne (UoC), Cologne, Germany
| | - Gregor Friedrich
- Department of Hematology and Cellular Therapy, University of Leipzig, Leipzig, Germany
| | - Michael Seifert
- Institute for Medical Informatics and Biometry (IMB), Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Johanna Stachelscheid
- Department I of Internal Medicine, Center for Integrated Oncology (CIO), Aachen-Bonn-Cologne-Duesseldorf, Excellence Cluster for Cellular Stress Response and Aging-Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC), University of Cologne (UoC), Cologne, Germany
| | - Marco Herling
- Department I of Internal Medicine, Center for Integrated Oncology (CIO), Aachen-Bonn-Cologne-Duesseldorf, Excellence Cluster for Cellular Stress Response and Aging-Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC), University of Cologne (UoC), Cologne, Germany.,Department of Hematology and Cellular Therapy, University of Leipzig, Leipzig, Germany
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