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| Open AccessThe basic helix-loop-helix transcription factor SHARP1 is an oncogenic driver in MLL-AF6 acute myelogenous leukemia
Gene fusions involving MLL and different partner genes define unique subgroups of acute myelogenous leukemia, but the mechanisms underlying specific subgroups are not fully clear. Here the authors elucidate the mechanisms of MLL-AF6 induced transformation, providing a distinct pathway that involves SHARP1 as a critical target.
- Akihiko Numata
- , Hui Si Kwok
- & Daniel G. Tenen
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Article
| Open AccessAggressive natural killer-cell leukemia mutational landscape and drug profiling highlight JAK-STAT signaling as therapeutic target
Aggressive natural killer-cell leukemia (ANKL) has few targeted therapies. Here ANKL patients are reported to harbor STAT3, RAS-MAPK pathway, DDX3X and epigenetic modifier mutations; and drug sensitivity profiling uncovers the importance of the JAK-STAT pathway, revealing potential ANKL therapeutic targets.
- Olli Dufva
- , Matti Kankainen
- & Satu Mustjoki
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| Open AccessCooperative STAT/NF-κB signaling regulates lymphoma metabolic reprogramming and aberrant GOT2 expression
Metabolic rewiring of cancer cells can be driven by both extrinsic and intrinsic factors. Here the authors show that microenvironmental factors induce metabolic rewiring of B-cell lymphoma through activation of STAT3 and NF-ΚB resulting in upregulation of the aminotransferase GOT2 and glutamine addiction.
- Maren Feist
- , Philipp Schwarzfischer
- & Dieter Kube
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Article
| Open AccessGFI1 facilitates efficient DNA repair by regulating PRMT1 dependent methylation of MRE11 and 53BP1
The transcription factor GFI1 mediates the DNA damage response (DDR) of T cells through a yet unknown mechanism. Here the authors show that GFI1 can adopt non-transcriptional roles during DDR, enabling PRMT1 to bind and methylate the DNA repair proteins MRE11 and 53BP1.
- Charles Vadnais
- , Riyan Chen
- & Tarik Möröy
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Article
| Open AccessHSP27 is a partner of JAK2-STAT5 and a potential therapeutic target in myelofibrosis
Myelofibrosis is a chronic degenerative disorder characterized by progressive bone marrow fibrosis. Here, the authors show that the chaperone HSP27 contributes to myelofibrosis via regulation of the JAK2/STAT5 pathway, and that antisense oligonucleotides targeting HSP27 are effective in two mouse models of the disease
- Margaux Sevin
- , Lucia Kubovcakova
- & Aurélie de Thonel
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Article
| Open AccessRING tetramerization is required for nuclear body biogenesis and PML sumoylation
Promyelocytic leukemia protein (PML) is a scaffolding protein that organizes PML nuclear bodies. Here the authors present the tetrameric crystal structure of the PML RING domain and show that RING tetramerization is functionally important for nuclear body formation and PML sumoylation.
- Pengran Wang
- , Shirine Benhenda
- & Guoyu Meng
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Article
| Open AccessA licensing step links AID to transcription elongation for mutagenesis in B cells
Activation-induced deaminase (AID) is important for inducing desirable mutations at the B cell receptor genes for effective antibody responses. Here the authors show that three key arginine residues of AID link AID-chromatin association with transcription elongation to license AID for specific mutagenesis in B cells.
- Stephen P. Methot
- , Ludivine C. Litzler
- & Javier M. Di Noia
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Article
| Open AccessIkaros family zinc finger 1 regulates dendritic cell development and function in humans
IKZF1 is a transcription factor known to regulate mammalian B-cell development. Here the authors show that IKZF1 is required for human pDC development and regulation of DC cytokine production in patients with IKZF1 haploinsufficiency, findings which are recapitulated in lenalidomide-induced IKZF1 deficiency.
- Urszula Cytlak
- , Anastasia Resteu
- & Venetia Bigley
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Article
| Open AccessRNA cytosine methylation and methyltransferases mediate chromatin organization and 5-azacytidine response and resistance in leukaemia
Resistance to chemotherapy is a serious issue that can be influenced by RNA epigenetics and chromatin structure. Here, the authors show in leukaemia cells that RNA 5-methylcytosine (RNA:m5C) and RNA:m5C methyltransferases (RCMTs) mediate chromatin structures that can modulate 5-Azacitidine response and resistance.
- Jason X. Cheng
- , Li Chen
- & James W. Vardiman
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Article
| Open AccessSipa1 deficiency unleashes a host-immune mechanism eradicating chronic myelogenous leukemia-initiating cells
Chronic myelogenous leukemia (CML)-initiating cells are resistant to kinase inhibitors. Here the authors show that deficiency of the Rap1 GTPase-activating protein Sipa1 in the tumor microenvironment releases an immune response that eradicates CML-initiating cells via interplay between stromal and T cells.
- Yan Xu
- , Satoshi Ikeda
- & Nagahiro Minato
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Article
| Open AccessFatty Acid Synthase induced S6Kinase facilitates USP11-eIF4B complex formation for sustained oncogenic translation in DLBCL
Aberrant protein translation and uncontrolled lipid metabolism are hallmarks of cancer growth. Here, in diffuse large B-cell lymphoma, the authors show that fatty acid synthase increases USP11 interaction with and stability of eIF4B via PI3K-S6Kinase signaling, promoting oncogenic protein translation.
- Bandish Kapadia
- , Nahid M. Nanaji
- & Ronald B. Gartenhaus
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Article
| Open AccessClonal dynamics towards the development of venetoclax resistance in chronic lymphocytic leukemia
BCL2-inhibitor venetoclax is used to treat relapsed/refractory chronic lymphocytic leukemia (CLL). Here, the authors show the clonal dynamics towards venetoclax resistance by performing whole-exome sequencing of 8 CLL patients undergoing venetoclax treatment.
- Carmen D. Herling
- , Nima Abedpour
- & Martin Peifer
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Article
| Open AccessActionable perturbations of damage responses by TCL1/ATM and epigenetic lesions form the basis of T-PLL
T-cell prolymphocytic leukemia (T-PLL) is a rare malignancy with a poor prognosis. Here, the authors investigate the genomic landscape, gene expression profiles and functional mechanisms in 111 patients, highlighting TCL1 overexpression and ATM aberrations as core lesions which co-operate to impair DNA damage processing.
- A. Schrader
- , G. Crispatzu
- & M. Herling
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Article
| Open AccessProliferation dynamics of acute myeloid leukaemia and haematopoietic progenitors competing for bone marrow space
How leukaemia cells invade the bone marrow by outcompeting haematopoietic cells is still unclear. Here, the authors used detailed cell number measurements in conjunction with a dual pulse labelling method to determine proliferation rates and followed the in vivo dynamics of AML disease progression.
- O. Akinduro
- , T. S. Weber
- & C. Lo Celso
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Article
| Open AccessCellular stressors contribute to the expansion of hematopoietic clones of varying leukemic potential
Cellular stressors can impact clonal hematopoiesis. Here, the authors explore the impact of cytotoxic therapy and hematopoietic transplantation on clonal expansion, suggesting different stressors can promote expansion of distinct long-lived clones.
- Terrence N. Wong
- , Christopher A. Miller
- & Daniel C. Link
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Article
| Open AccessAICDA drives epigenetic heterogeneity and accelerates germinal center-derived lymphomagenesis
In diffuse large B-cell lymphoma (DLBCL) increased epigenetic heterogeneity in the form of cytosine methylation is known to link to a poor clinical outcome. Here, the authors show that AICDA, an enzyme required for DLBCL pathogenesis, increases cytosine methylation heterogeneity.
- Matt Teater
- , Pilar M. Dominguez
- & Rita Shaknovich
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Article
| Open AccessPeptidomimetic blockade of MYB in acute myeloid leukemia
MYB activity is a key factor for the maintenance of acute myeloid leukemias but it is also a difficult target. Here, the authors develop a peptidomimetic (MYBMIM) that prevents the interaction of the trans-activation domain of MYB with the KIX domain of CBP/P300 and inhibits leukaemia growth.
- Kavitha Ramaswamy
- , Lauren Forbes
- & Alex Kentsis
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Article
| Open AccessA non-cell-autonomous role for Pml in the maintenance of leukemia from the niche
Persistence of resistant leukemic cells after therapy is the main cause of relapse. Here, the authors show that mesenchymal stem cells-derived PML is involved in the maintenance of leukemia cells through Cxcl1 and IL6 and that PML inhibition enhances sensitivity to chemotherapy.
- Jlenia Guarnerio
- , Lourdes Maria Mendez
- & Pier Paolo Pandolfi
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Article
| Open AccessA machine learning approach to integrate big data for precision medicine in acute myeloid leukemia
Identification of markers of drug response is essential for precision therapy. Here the authors introduce an algorithm that uses prior information about each gene’s importance in AML to identify the most predictive gene-drug associations from transcriptome and drug response data from 30 AML samples.
- Su-In Lee
- , Safiye Celik
- & Pamela S. Becker
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Article
| Open AccessRAS-pathway mutation patterns define epigenetic subclasses in juvenile myelomonocytic leukemia
Juvenile myelomonocytic leukemia (JMML) is an aggressive disease with limited options for treatment. Here, the authors analyse the DNA methylome and mutational profile of JMML to define three subgroups with unique molecular and clinical characteristics.
- Daniel B. Lipka
- , Tania Witte
- & Christoph Plass
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Article
| Open AccessGenome-wide DNA methylation is predictive of outcome in juvenile myelomonocytic leukemia
Juvenile myelomonocytic leukemia (JMML) is an aggressive disease with limited options for treatment. Here, the authors utilize DNA methylation based subgroups in JMML to predict clinical outcome.
- Elliot Stieglitz
- , Tali Mazor
- & Mignon L. Loh
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Article
| Open AccessTargeted inhibition of STAT/TET1 axis as a therapeutic strategy for acute myeloid leukemia
Ten-eleven translocation 1 (TET1) is a critical oncoprotein in AML. Here, the authors identify 2 compounds that target the binding of STAT3/5 specifically to the TET1 promoter, inhibiting its expression and AML cell viability.
- Xi Jiang
- , Chao Hu
- & Jianjun Chen
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Article
| Open AccessAlu-dependent RNA editing of GLI1 promotes malignant regeneration in multiple myeloma
The treatment of multiple myeloma is challenging due to high relapse rates. Here the authors show that expression of ADAR1 correlates with poor patient outcomes, and that ADAR1-mediated editing of GLI1 is a mechanism relevant in the context of multiple myeloma progression and drug resistance.
- Elisa Lazzari
- , Phoebe K. Mondala
- & Catriona H. M. Jamieson
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Article
| Open AccessDendrogenin A drives LXR to trigger lethal autophagy in cancers
Dendrogenin A, cholesterol metabolite, has tumor suppressive properties but the mechanisms are unknown. Here the authors show that Dendrogenin A can induce autophagy-mediated cell death in both melanoma and acute myeloid leukaemia.
- Gregory Segala
- , Marion David
- & Sandrine Silvente-Poirot
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Article
| Open AccessGenome-wide association study of classical Hodgkin lymphoma identifies key regulators of disease susceptibility
Classical Hodgkin lymphoma is a cancer that originates in lymph nodes. Little is known about its genetic susceptibility. Here, the authors combined existing and new genome-wide association studies to identify risk loci for classical Hodgkin lymphoma at 6q22.33, and nodular sclerosis Hodgkin lymphoma at 3q28, 6q23.3, 10p14, 13q34, 16p13.13.
- Amit Sud
- , Hauke Thomsen
- & Richard S. Houlston
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Article
| Open AccessExpressed fusion gene landscape and its impact in multiple myeloma
Multiple myeloma is a malignancy of plasma cells in the blood. Here, the authors establish the landscape of fusion genes within this disease, identifying novel recurrent fusion genes that impact survival and may drive disease progression.
- A. Cleynen
- , R. Szalat
- & H. Avet-Loiseau
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Article
| Open AccessCheckpoint kinase 1 is essential for normal B cell development and lymphomagenesis
Checkpoint kinase 1 (CHK1) is critical for intrinsic cell cycle control and coordination of cell cycle progression. Here the authors show that CHK1 loss or chemical inhibition impacts on normal B cell development, lymphomagenesis and cancer cell survival.
- Fabian Schuler
- , Johannes G. Weiss
- & Andreas Villunger
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Article
| Open AccessDetermining therapeutic susceptibility in multiple myeloma by single-cell mass accumulation
Multiple myeloma is characterized by high rates of drug resistance and relapse. Here the authors utilize a functional assay to assess the ex vivo drug sensitivity of single multiple myeloma cells based on measuring the mass accumulation rate of individual cells.
- Arif E. Cetin
- , Mark M. Stevens
- & Scott R. Manalis
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Article
| Open AccessThe genomic landscape of pediatric myelodysplastic syndromes
Myelodysplastic syndromes (MDS) are uncommon in children and have poor prognosis. Here, the authors interrogate the genomic landscape of MDS, confirming adult and paediatric MDS are separate diseases with disparate mechanisms, and highlighting that SAMD9/SAMD9L mutations represent a new class of MDS predisposition.
- Jason R. Schwartz
- , Jing Ma
- & Jeffery M. Klco
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Article
| Open AccessEvolution of AF6-RAS association and its implications in mixed-lineage leukemia
Several rearrangements of the MLL gene are associated with acute leukemia, including the fusion of MLL with a RAS effector protein, AF6. Here the authors show that the truncated AF6 can induce AF6-MLL dimerization and drive its oncogenic activity.
- Matthew J. Smith
- , Elizabeth Ottoni
- & Mitsuhiko Ikura
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Article
| Open AccessNFAT2 is a critical regulator of the anergic phenotype in chronic lymphocytic leukaemia
NFAT2 is a transcription factor that has been linked with chronic lymphocytic leukaemia (CLL), but its functions in CLL manifestation are still unclear. Here the authors show, by analysing mouse CLL models and characterising biopsies from CLL patients, that NFAT2 is an important regulator for the anergic phenotype of CLL.
- Melanie Märklin
- , Jonas S. Heitmann
- & Martin R. Müller
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Article
| Open AccessThe non-canonical poly(A) polymerase FAM46C acts as an onco-suppressor in multiple myeloma
FAM46C is one of the most frequently mutated genes in multiple myeloma (MM), but its molecular function remains unknown. Here the authors show that FAM46C is a poly(A) polymerase and that loss of function of FAM46C drives multiple myeloma through the destabilisation of ER response transcripts.
- Seweryn Mroczek
- , Justyna Chlebowska
- & Andrzej Dziembowski
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Article
| Open AccessHSP70-Hrd1 axis precludes the oncorepressor potential of N-terminal misfolded Blimp-1s in lymphoma cells
The transcriptional repressor Blimp-1 has an important role in B-cell differentiation. Here the authors show that lymphoma-associated Blimp-1 mutants are selectively recognized by HSP70-Hrd1, which leads to their accelerated degradation and propose HSP70 inhibition as a therapeutic approach for certain lymphomas.
- Wen-Fang Wang
- , Li Yan
- & Jiang Zhu
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Article
| Open AccessSpatial genomic heterogeneity in multiple myeloma revealed by multi-region sequencing
In multiple myeloma, malignant cells expand within bone marrow. Here, the authors use multi-region sequencing in patient samples to analyse spatial clonal architecture and heterogeneity, providing novel insight into multiple myeloma progression and evolution.
- L. Rasche
- , S. S. Chavan
- & N. Weinhold
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Article
| Open AccessATR inhibition facilitates targeting of leukemia dependence on convergent nucleotide biosynthetic pathways
Leukemic cells depend on the nucleotide synthesis pathway to proliferate. Here the authors use metabolomics and proteomics to show that inhibition of ATR reduced the activity of these pathways thus providing a valuable therapeutic target in leukemia.
- Thuc M. Le
- , Soumya Poddar
- & Caius G. Radu
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Article
| Open AccessThe non-coding RNA landscape of human hematopoiesis and leukemia
While micro-RNAs are known regulators of haematopoiesis and leukemogenesis, the role of long non-coding RNAs is less clear. Here the authors provide a non-coding RNA expression landscape of the human hematopoietic system, highlighting their role in the formation and maintenance of the human blood hierarchy.
- Adrian Schwarzer
- , Stephan Emmrich
- & Jan-Henning Klusmann
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Article
| Open AccessTwo mouse models reveal an actionable PARP1 dependence in aggressive chronic lymphocytic leukemia
ATM and TP53 mutations are associated with poor prognosis in chronic lymphocytic leukaemia (CLL). Here the authors generate mouse models of Tp53- and Atm-defective CLL mimicking the high-risk form of human disease and show that Atm-deficient CLL is sensitive to PARP1 inhibition.
- Gero Knittel
- , Tim Rehkämper
- & H. Christian Reinhardt
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Article
| Open AccessDisruption of the C/EBPα—miR-182 balance impairs granulocytic differentiation
C/EBPα is a critical transcription factor involved in myelopoiesis and its inactivation is associated with acute myeloid leukemia (AML). Here the authors show a negative feedback loop between C/EBPα and miR-182 and identify this miRNA as a marker of high-risk AML.
- Alexander Arthur Wurm
- , Polina Zjablovskaja
- & Gerhard Behre
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Article
| Open AccessDistinct homotypic B-cell receptor interactions shape the outcome of chronic lymphocytic leukaemia
Chronic lymphocytic leukaemia (CLL) is characterized by cell-autonomous B-cell receptor (BcR)-mediated signalling of neoplastic B lymphocytes. Here the authors unveil the structural basis and diversity of activatory homotypic BcR contacts and link them with CLL heterogeneity and the clinical outcome.
- Claudia Minici
- , Maria Gounari
- & Massimo Degano
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Article
| Open AccessLoss of Asxl2 leads to myeloid malignancies in mice
ASXL2 mutations are mostly found in a subset of leukemia patients with certain genetic aberrations; however the role of this protein in normal hematopoiesis and related malignancies is still unclear. Here the authors use a knock-out mouse model to uncover the role of Asxl2in hematopoiesis and leukemogenesis.
- Jianping Li
- , Fuhong He
- & Feng-Chun Yang
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Article
| Open AccessCis-perturbation of cancer drivers by the HTLV-1/BLV proviruses is an early determinant of leukemogenesis
Human T-cell leukaemia virus type-1 and bovine leukaemia virus infect T and B lymphocytes and lead to aggressive leukaemia. Here, the authors show these proviruses integrate near cancer drivers perturbing transcription termination or antisense RNA-dependent interaction, suggesting post-transcriptional mechanisms in some cases.
- Nicolas Rosewick
- , Keith Durkin
- & Anne Van den Broeke
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Article
| Open AccesspSILAC mass spectrometry reveals ZFP91 as IMiD-dependent substrate of the CRL4CRBN ubiquitin ligase
Targeting therapeutically-relevant proteins for degradation is an emerging paradigm in drug discovery. Here the authors describe a sensitive pulse SILAC mass spectrometry-based proteomics approach that reports global changes in protein stability following drug treatment in a single time point experiment.
- Jian An
- , Charles M. Ponthier
- & Eric S. Fischer
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Article
| Open AccessASXL2 is essential for haematopoiesis and acts as a haploinsufficient tumour suppressor in leukemia
While the role of ASLX1 in haematopoiesis and leukaemia has been heavily studied, the role of ASLX2 is unclear. Here the authors show that ASLX2 is required for normal haematopoietic stem cell self-renewal whereas Asxl2 loss promotes leukemogenesis, thus explaining the frequently observed mutations in AML patients
- Jean-Baptiste Micol
- , Alessandro Pastore
- & Omar Abdel-Wahab
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Article
| Open AccessProlonged intracellular accumulation of light-inducible nanoparticles in leukemia cells allows their remote activation
Leukaemia cells resident in the bone marrow niche are often resistant to conventional therapies. In this study, the authors develop light-sensitive, polymeric, retinoic acid-containing nanoparticles that are able to modulate the differentiation of resistant leukaemia cells bothin vitro and in vivo.
- Carlos Boto
- , Emanuel Quartin
- & Lino Ferreira
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Article
| Open AccessTet2 loss leads to hypermutagenicity in haematopoietic stem/progenitor cells
TET2 catalyses DNA demethylation and is mutated in various blood cancers; in particularTet2null mice develop haematological neoplasms. Here the authors show that this effect could be due to the increased frequency of mutation associated with TET2 loss in haematopoietic stem/progenitor cells.
- Feng Pan
- , Thomas S. Wingo
- & Mingjiang Xu
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Article
| Open AccessClonal evolution in myelodysplastic syndromes
Myelodysplastic syndromes are a broad group of haematopoietic malignancies that often progress to acute myeloid leukaemia. Here, the authors show that linear and branched evolution occurs within myelodysplastic syndrome and these patterns can be impacted by treatment.
- Pedro da Silva-Coelho
- , Leonie I. Kroeze
- & Joop H. Jansen
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Article
| Open AccessUnification of de novo and acquired ibrutinib resistance in mantle cell lymphoma
Ibrutinib has demonstrated high response rates in B-cell lymphomas but a lot of ibrutinib-treated patients relapse with resistance. This study unified TME-mediatedde novoand acquired drug resistance through B-cell receptor signalling and PI3K-AKT-mTOR axis and provides a combination therapeutic strategy against B-cell malignancies.
- Xiaohong Zhao
- , Tint Lwin
- & Jianguo Tao
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Article
| Open AccessCirculating tumour DNA reflects treatment response and clonal evolution in chronic lymphocytic leukaemia
Disease monitoring of chronic lymphocytic leukaemia (CLL) is a challenge. Here, the authors show that serial ctDNA analysis in 32 CLL patients allows monitoring of clonal dynamics over time, and identifies the emergence of genomic changes associated with Richter’s syndrome.
- Paul Yeh
- , Tane Hunter
- & Sarah-Jane Dawson
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Article
| Open AccessGenomic characterisation of Eμ-Myc mouse lymphomas identifies Bcor as a Myc co-operative tumour-suppressor gene
The Eμ-Myc lymphoma mouse model has been invaluable in the study of this disease. Here, the authors use multiple sequencing strategies to analyse the tumours in these mice and find recurrent inactivating mutations in Bcor, suggesting that this gene has a negative role in Mycsignalling.
- Marcus Lefebure
- , Richard W. Tothill
- & Ricky W. Johnstone