Leukemia最新文献

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Proteomic screening identifies PF4/Cxcl4 as a critical driver of myelofibrosis 蛋白质组筛选确定 PF4/Cxcl4 是骨髓纤维化的关键驱动因素。
IF 12.8 1区 医学
Leukemia Pub Date : 2024-07-18 DOI: 10.1038/s41375-024-02354-z
Daniele Capitanio, Francesca R. Calledda, Vittorio Abbonante, Daniele Cattaneo, Manuela Moriggi, Bartalucci Niccolò, Cristina Bucelli, Delfina Tosi, Umberto Gianelli, Alessandro Maria Vannucchi, Alessandra Iurlo, Cecilia Gelfi, Alessandra Balduini, Alessandro Malara
{"title":"Proteomic screening identifies PF4/Cxcl4 as a critical driver of myelofibrosis","authors":"Daniele Capitanio, Francesca R. Calledda, Vittorio Abbonante, Daniele Cattaneo, Manuela Moriggi, Bartalucci Niccolò, Cristina Bucelli, Delfina Tosi, Umberto Gianelli, Alessandro Maria Vannucchi, Alessandra Iurlo, Cecilia Gelfi, Alessandra Balduini, Alessandro Malara","doi":"10.1038/s41375-024-02354-z","DOIUrl":"10.1038/s41375-024-02354-z","url":null,"abstract":"Despite increased understanding of the genomic landscape of Myeloproliferative Neoplasms (MPNs), the pathological mechanisms underlying abnormal megakaryocyte (Mk)-stromal crosstalk and fibrotic progression in MPNs remain unclear. We conducted mass spectrometry-based proteomics on mice with Romiplostim-dependent myelofibrosis to reveal alterations in signaling pathways and protein changes in Mks, platelets, and bone marrow (BM) cells. The chemokine Platelet Factor 4 (PF4)/Cxcl4 was up-regulated in all proteomes and increased in plasma and BM fluids of fibrotic mice. High TPO concentrations sustained in vitro PF4 synthesis and secretion in cultured Mks, while Ruxolitinib restrains the abnormal PF4 expression in vivo. We discovered that PF4 is rapidly internalized by stromal cells through surface glycosaminoglycans (GAGs) to promote myofibroblast differentiation. Cxcl4 gene silencing in Mks mitigated the profibrotic phenotype of stromal cells in TPO-saturated co-culture conditions. Consistently, extensive stromal PF4 uptake and altered GAGs deposition were detected in Romiplostim-treated, JAK2V617F mice and BM biopsies of MPN patients. BM PF4 levels and Mk/platelet CXCL4 expression were elevated in patients, exclusively in overt fibrosis. Finally, pharmacological inhibition of GAGs ameliorated in vivo fibrosis in Romiplostim-treated mice. Thus, our findings highlight the critical role of PF4 in the fibrosis progression of MPNs and substantiate the potential therapeutic strategy of neutralizing PF4-GAGs interaction.","PeriodicalId":18109,"journal":{"name":"Leukemia","volume":null,"pages":null},"PeriodicalIF":12.8,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141723848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nudt15-mediated inflammatory signaling contributes to divergent outcomes in leukemogenesis and hematopoiesis Nudt15介导的炎症信号转导导致了白血病发生和造血过程中的不同结果。
IF 12.8 1区 医学
Leukemia Pub Date : 2024-07-18 DOI: 10.1038/s41375-024-02352-1
Jiachen Wang, Yu Zhang, Lei Li, Liujiao Wang, Shuainan Sun, Bowu Wang, Yanwen Ge, Zhonghui Zhang
{"title":"Nudt15-mediated inflammatory signaling contributes to divergent outcomes in leukemogenesis and hematopoiesis","authors":"Jiachen Wang, Yu Zhang, Lei Li, Liujiao Wang, Shuainan Sun, Bowu Wang, Yanwen Ge, Zhonghui Zhang","doi":"10.1038/s41375-024-02352-1","DOIUrl":"10.1038/s41375-024-02352-1","url":null,"abstract":"NUDT15 encodes nucleotide triphosphate diphosphatase that is responsible for metabolizing purine analog drugs, and its genetic mutation results in severe side effects from thiopurine therapy. However, the functions of Nudt15 in leukemic stem cells (LSCs) and hematopoietic stem cells (HSCs) remain unknown. Here we reveal the Nudt15-regulating self-renewal of both mouse LSCs and HSCs. Our data show that Nudt15 negatively regulates murine leukemogenesis and its deficiency prolongs the survival of murine AML recipients by impairing LSC self-renewal, while Nudt15 ablation markedly enhances mouse HSC regenerative potential and self-renewal. Mechanistically, Nudt15 modulates inflammatory signaling in mouse LSCs and HSCs, leading to divergent self-renewal outcomes. Nudt15 depletion inhibits mouse LSC self-renewal by downregulating Ifi30, resulting in elevating intracellular ROS level. Gata2, a key regulator, is required for Nudt15-mediating inflammatory signaling in mouse HSCs. Collectively, our results present new crucial roles of Nudt15 in maintaining the functions of mouse LSC and HSC through inflammatory signaling and have a new insight into clinical implications.","PeriodicalId":18109,"journal":{"name":"Leukemia","volume":null,"pages":null},"PeriodicalIF":12.8,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141723847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Molecular relapse after first-line intensive therapy in patients with CBF or NPM1-mutated acute myeloid leukemia – a FILO study CBF或NPM1突变急性髓性白血病患者一线强化治疗后的分子复发--一项FILO研究
IF 12.8 1区 医学
Leukemia Pub Date : 2024-07-17 DOI: 10.1038/s41375-024-02335-2
Corentin Orvain, Sarah Bertoli, Pierre Peterlin, Yohann Desbrosses, Pierre-Yves Dumas, Alexandre Iat, Marie-Anne Hospital, Martin Carre, Emmanuelle Tavernier, Jérémie Riou, Anne Bouvier, Audrey Bidet, Sylvie Tondeur, Florian Renosi, Marie-Joelle Mozziconacci, Pascale Flandrin-Gresta, Bérengère Dadone-Montaudié, Eric Delabesse, Arnaud Pigneux, Mathilde Hunault-Berger, Christian Recher
{"title":"Molecular relapse after first-line intensive therapy in patients with CBF or NPM1-mutated acute myeloid leukemia – a FILO study","authors":"Corentin Orvain, Sarah Bertoli, Pierre Peterlin, Yohann Desbrosses, Pierre-Yves Dumas, Alexandre Iat, Marie-Anne Hospital, Martin Carre, Emmanuelle Tavernier, Jérémie Riou, Anne Bouvier, Audrey Bidet, Sylvie Tondeur, Florian Renosi, Marie-Joelle Mozziconacci, Pascale Flandrin-Gresta, Bérengère Dadone-Montaudié, Eric Delabesse, Arnaud Pigneux, Mathilde Hunault-Berger, Christian Recher","doi":"10.1038/s41375-024-02335-2","DOIUrl":"10.1038/s41375-024-02335-2","url":null,"abstract":"Patients with Core-Binding Factor (CBF) and NPM1-mutated acute myeloid leukemia (AML) can be monitored by quantitative PCR after having achieved first complete remission (CR) to detect morphologic relapse and drive preemptive therapy. How to best manage these patients is unknown. We retrospectively analyzed 303 patients with CBF and NPM1-mutated AML, aged 18–60 years, without allogeneic hematopoietic cell transplantation (HCT) in first CR, with molecular monitoring after first-line intensive therapy. Among these patients, 153 (51%) never relapsed, 95 (31%) had molecular relapse (53 received preemptive therapy and 42 progressed to morphologic relapse at salvage therapy), and 55 (18%) had upfront morphologic relapse. Patients who received preemptive therapy had higher OS than those who received salvage therapy after having progressed from molecular to morphologic relapse and those with upfront morphologic relapse (three-year OS: 78% vs. 51% vs. 51%, respectively, P = 0.01). Preemptive therapy included upfront allogeneic HCT (n = 19), intensive chemotherapy (n = 21), and non-intensive therapy (n = 13; three-year OS: 92% vs. 79% vs. 58%, respectively, P = 0.09). Although not definitive due to the non-randomized allocation of patients to different treatment strategies at relapse, our study suggests that molecular monitoring should be considered during follow-up to start preemptive therapy before overt morphologic relapse.","PeriodicalId":18109,"journal":{"name":"Leukemia","volume":null,"pages":null},"PeriodicalIF":12.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41375-024-02335-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141631473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Immunofluorescence microscopy on the blood smear identifies patients with myeloproliferative neoplasms 免疫荧光显微镜在血液涂片上识别骨髓增殖性肿瘤患者。
IF 12.8 1区 医学
Leukemia Pub Date : 2024-07-17 DOI: 10.1038/s41375-024-02346-z
Carlo Zaninetti, Leonard Vater, Lars Kaderali, Carl C. Crodel, Tina M. Schnöder, Jessica Fuhrmann, Leonard Swensson, Jan Wesche, Carmen Freyer, Andreas Greinacher, Florian H. Heidel
{"title":"Immunofluorescence microscopy on the blood smear identifies patients with myeloproliferative neoplasms","authors":"Carlo Zaninetti, Leonard Vater, Lars Kaderali, Carl C. Crodel, Tina M. Schnöder, Jessica Fuhrmann, Leonard Swensson, Jan Wesche, Carmen Freyer, Andreas Greinacher, Florian H. Heidel","doi":"10.1038/s41375-024-02346-z","DOIUrl":"10.1038/s41375-024-02346-z","url":null,"abstract":"","PeriodicalId":18109,"journal":{"name":"Leukemia","volume":null,"pages":null},"PeriodicalIF":12.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41375-024-02346-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141633910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FBXL6 is a vulnerability in AML and unmasks proteolytic cleavage as a major experimental pitfall in myeloid cells FBXL6 是急性髓细胞性白血病的易感基因,它揭示了蛋白水解裂解是骨髓细胞实验中的一个主要陷阱
IF 12.8 1区 医学
Leukemia Pub Date : 2024-07-16 DOI: 10.1038/s41375-024-02345-0
Anna Sperk, Antje Gabriel, Daniela Koch, Abirami Augsburger, Victoria Sanchez, David Brockelt, Rupert Öllinger, Thomas Engleitner, Piero Giansanti, Romina Ludwig, Priska Auf der Maur, Wencke Walter, Torsten Haferlach, Irmela Jeremias, Roland Rad, Barbara Steigenberger, Bernhard Kuster, Ruth Eichner, Florian Bassermann
{"title":"FBXL6 is a vulnerability in AML and unmasks proteolytic cleavage as a major experimental pitfall in myeloid cells","authors":"Anna Sperk, Antje Gabriel, Daniela Koch, Abirami Augsburger, Victoria Sanchez, David Brockelt, Rupert Öllinger, Thomas Engleitner, Piero Giansanti, Romina Ludwig, Priska Auf der Maur, Wencke Walter, Torsten Haferlach, Irmela Jeremias, Roland Rad, Barbara Steigenberger, Bernhard Kuster, Ruth Eichner, Florian Bassermann","doi":"10.1038/s41375-024-02345-0","DOIUrl":"10.1038/s41375-024-02345-0","url":null,"abstract":"","PeriodicalId":18109,"journal":{"name":"Leukemia","volume":null,"pages":null},"PeriodicalIF":12.8,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41375-024-02345-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141624984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Validation of independent prognostic significance of blast count in a large cohort of MDS patients 在一大批 MDS 患者中验证爆炸细胞计数的独立预后意义。
IF 12.8 1区 医学
Leukemia Pub Date : 2024-07-16 DOI: 10.1038/s41375-024-02348-x
Raniah Al Amri, Vandana Baloda, Sara A. Monaghan, Flavia G. Rosado, Erika M. Moore, Bryan Rea, Miroslav Djokic, Nidhi Aggarwal, Svetlana A. Yatsenko, Nathanael G. Bailey
{"title":"Validation of independent prognostic significance of blast count in a large cohort of MDS patients","authors":"Raniah Al Amri, Vandana Baloda, Sara A. Monaghan, Flavia G. Rosado, Erika M. Moore, Bryan Rea, Miroslav Djokic, Nidhi Aggarwal, Svetlana A. Yatsenko, Nathanael G. Bailey","doi":"10.1038/s41375-024-02348-x","DOIUrl":"10.1038/s41375-024-02348-x","url":null,"abstract":"","PeriodicalId":18109,"journal":{"name":"Leukemia","volume":null,"pages":null},"PeriodicalIF":12.8,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141627045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
PHF6 suppresses self-renewal of leukemic stem cells in AML PHF6 抑制急性髓细胞性白血病干细胞的自我更新
IF 12.8 1区 医学
Leukemia Pub Date : 2024-07-14 DOI: 10.1038/s41375-024-02340-5
Sapana S. Jalnapurkar, Aishwarya S. Pawar, Subin S. George, Charles Antony, Patrick Somers, Jason Grana, Victoria K. Feist, Sandeep Gurbuxani, Vikram R. Paralkar
{"title":"PHF6 suppresses self-renewal of leukemic stem cells in AML","authors":"Sapana S. Jalnapurkar, Aishwarya S. Pawar, Subin S. George, Charles Antony, Patrick Somers, Jason Grana, Victoria K. Feist, Sandeep Gurbuxani, Vikram R. Paralkar","doi":"10.1038/s41375-024-02340-5","DOIUrl":"10.1038/s41375-024-02340-5","url":null,"abstract":"Acute myeloid leukemia is characterized by uncontrolled proliferation of self-renewing myeloid progenitors accompanied by a differentiation arrest. PHF6 is a chromatin-binding protein mutated in myeloid leukemias, and its isolated loss increases mouse HSC self-renewal without malignant transformation. We report here that Phf6 knockout increases the aggressiveness of Hoxa9-driven AML over serial transplantation, and increases the frequency of leukemia initiating cells. We define the in vivo hierarchy of Hoxa9-driven AML and identify a population that we term the “LIC-e” (leukemia initiating cells enriched) population. We find that Phf6 loss expands the LIC-e population and skews its transcriptome to a more stem-like state; concordant transcriptome shifts are also observed on PHF6 knockout in a human AML cell line and in PHF6 mutant patient samples from the BEAT AML dataset. We demonstrate that LIC-e accumulation in Phf6 knockout AML occurs not due to effects on cell cycle or apoptosis, but due to an increase in the fraction of its progeny that retain LIC-e identity. Our work indicates that Phf6 loss increases AML self-renewal through context-specific effects on leukemia stem cells.","PeriodicalId":18109,"journal":{"name":"Leukemia","volume":null,"pages":null},"PeriodicalIF":12.8,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41375-024-02340-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141608146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Targeting CERS6-AS1/FGFR1 axis as synthetic vulnerability to constrain stromal cells supported proliferation in Mantle cell lymphoma 靶向 CERS6-AS1/FGFR1 轴作为合成漏洞,限制基质细胞在套细胞淋巴瘤中的增殖。
IF 12.8 1区 医学
Leukemia Pub Date : 2024-07-13 DOI: 10.1038/s41375-024-02344-1
Udita Jindal, Mukesh Mamgain, Uttam Kumar Nath, Isha Sharma, Bhaskar Pant, Ankita Sharma, Archita Gupta, Khaliqur Rahman, Sunil Yadav, Manish Pratap Singh, Shaktiprasad Mishra, Chandra Praksah Chaturvedi, Jose Courty, Navin Singh, Seema Gupta, Sanjeev Kumar, Shailendra Prasad Verma, Saumyaranjan Mallick, Ajay Gogia, Sunil Raghav, Jayanta Sarkar, Kinshuk Raj Srivastava, Dipak Datta, Neeraj Jain
{"title":"Targeting CERS6-AS1/FGFR1 axis as synthetic vulnerability to constrain stromal cells supported proliferation in Mantle cell lymphoma","authors":"Udita Jindal, Mukesh Mamgain, Uttam Kumar Nath, Isha Sharma, Bhaskar Pant, Ankita Sharma, Archita Gupta, Khaliqur Rahman, Sunil Yadav, Manish Pratap Singh, Shaktiprasad Mishra, Chandra Praksah Chaturvedi, Jose Courty, Navin Singh, Seema Gupta, Sanjeev Kumar, Shailendra Prasad Verma, Saumyaranjan Mallick, Ajay Gogia, Sunil Raghav, Jayanta Sarkar, Kinshuk Raj Srivastava, Dipak Datta, Neeraj Jain","doi":"10.1038/s41375-024-02344-1","DOIUrl":"10.1038/s41375-024-02344-1","url":null,"abstract":"The interaction between stromal and tumor cells in tumor microenvironment is a crucial factor in Mantle cell lymphoma (MCL) progression and therapy resistance. We have identified a long non-coding RNA, CERS6-AS1, upregulated in MCL and associated with poor overall survival. CERS6-AS1 expression was elevated in primary MCL within stromal microenvironment and in a subset of MCL cells adhered to stromal layer. These stromal-adhered MCL-subsets exhibited cancer stem cell signatures than suspension counterparts. Mechanistically, we found that downregulating CERS6-AS1 in MCL reduced Fibroblast Growth Factor Receptor-1 (FGFR1), expression attributed to loss of its interaction with RNA-binding protein nucleolin. In addition, using in-silico approach, we have discovered a direct interaction between nucleolin and 5’UTR of FGFR1, thereby regulating FGFR1 transcript stability. We discovered a positive association of CERS6-AS1 with cancer stem cell signatures, and Wnt signaling. Building on these, we explored potential therapeutic strategies where combining nucleolin-targeting agent with FGFR1 inhibition significantly contributed to reversing cancer stem cell signatures and abrogated primary MCL cell growth on stromal layer. These findings provide mechanistic insights into regulatory network involving CERS6-AS1, nucleolin, and FGFR1 axis-associated crosstalk between tumor cells and stromal cell interaction and highlights therapeutic potential of targeting a non-coding RNA in MCL.","PeriodicalId":18109,"journal":{"name":"Leukemia","volume":null,"pages":null},"PeriodicalIF":12.8,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41375-024-02344-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141603867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Altered RNA export by SF3B1 mutants confers sensitivity to nuclear export inhibition SF3B1突变体的RNA输出改变了对核输出抑制的敏感性。
IF 12.8 1区 医学
Leukemia Pub Date : 2024-07-13 DOI: 10.1038/s41375-024-02328-1
Sana Chaudhry, Felipe Beckedorff, Shaista Shabbir Jasdanwala, Tulasigeri M. Totiger, Maurizio Affer, Abimbola Eunice Lawal, Skye Montoya, Francesco Tamiro, Olivia Tonini, Alexandra Chirino, Andrew Adams, Anya K. Sondhi, Stephen Noudali, Alyssa Mauri Cornista, Miah Nicholls, Jumana Afaghani, Paola Robayo, Daniel Bilbao, Stephen D. Nimer, Jose Antonio Rodríguez, Shruti Bhatt, Eric Wang, Justin Taylor
{"title":"Altered RNA export by SF3B1 mutants confers sensitivity to nuclear export inhibition","authors":"Sana Chaudhry, Felipe Beckedorff, Shaista Shabbir Jasdanwala, Tulasigeri M. Totiger, Maurizio Affer, Abimbola Eunice Lawal, Skye Montoya, Francesco Tamiro, Olivia Tonini, Alexandra Chirino, Andrew Adams, Anya K. Sondhi, Stephen Noudali, Alyssa Mauri Cornista, Miah Nicholls, Jumana Afaghani, Paola Robayo, Daniel Bilbao, Stephen D. Nimer, Jose Antonio Rodríguez, Shruti Bhatt, Eric Wang, Justin Taylor","doi":"10.1038/s41375-024-02328-1","DOIUrl":"10.1038/s41375-024-02328-1","url":null,"abstract":"SF3B1 mutations frequently occur in cancer yet lack targeted therapies. Clinical trials of XPO1 inhibitors, selinexor and eltanexor, in high-risk myelodysplastic neoplasms (MDS) revealed responders were enriched with SF3B1 mutations. Given that XPO1 (Exportin-1) is a nuclear exporter responsible for the export of proteins and multiple RNA species, this led to the hypothesis that SF3B1-mutant cells are sensitive to XPO1 inhibition, potentially due to altered splicing. Subsequent RNA sequencing after XPO1 inhibition in SF3B1 wildtype and mutant cells showed increased nuclear retention of RNA transcripts and increased alternative splicing in the SF3B1 mutant cells particularly of genes that impact apoptotic pathways. To identify novel drug combinations that synergize with XPO1 inhibition, a forward genetic screen was performed with eltanexor treatment implicating anti-apoptotic targets BCL2 and BCLXL, which were validated by functional testing in vitro and in vivo. These targets were tested in vivo using Sf3b1K700E conditional knock-in mice, which showed that the combination of eltanexor and venetoclax (BCL2 inhibitor) had a preferential sensitivity for SF3B1 mutant cells without excessive toxicity. In this study, we unveil the mechanisms underlying sensitization to XPO1 inhibition in SF3B1-mutant MDS and preclinically rationalize the combination of eltanexor and venetoclax for high-risk MDS.","PeriodicalId":18109,"journal":{"name":"Leukemia","volume":null,"pages":null},"PeriodicalIF":12.8,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41375-024-02328-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141600329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The RNA helicases DDX19A/B modulate selinexor sensitivity by regulating MCL1 mRNA nuclear export in leukemia cells RNA 螺旋酶 DDX19A/B 通过调节白血病细胞中 MCL1 mRNA 的核输出来调节西林索的敏感性。
IF 12.8 1区 医学
Leukemia Pub Date : 2024-07-11 DOI: 10.1038/s41375-024-02343-2
Tatsuya Terasaki, Yuichiro Semba, Kensuke Sasaki, Hiroshi Imanaga, Kiyoko Setoguchi, Takuji Yamauchi, Shigeki Hirabayashi, Fumihiko Nakao, Koshi Akahane, Takeshi Inukai, Takaomi Sanda, Koichi Akashi, Takahiro Maeda
{"title":"The RNA helicases DDX19A/B modulate selinexor sensitivity by regulating MCL1 mRNA nuclear export in leukemia cells","authors":"Tatsuya Terasaki, Yuichiro Semba, Kensuke Sasaki, Hiroshi Imanaga, Kiyoko Setoguchi, Takuji Yamauchi, Shigeki Hirabayashi, Fumihiko Nakao, Koshi Akahane, Takeshi Inukai, Takaomi Sanda, Koichi Akashi, Takahiro Maeda","doi":"10.1038/s41375-024-02343-2","DOIUrl":"10.1038/s41375-024-02343-2","url":null,"abstract":"Selinexor, a first-in-class exportin1 (XPO1) inhibitor, is an attractive anti-tumor agent because of its unique mechanisms of action; however, its dose-dependent toxicity and lack of biomarkers preclude its wide use in clinical applications. To identify key molecules/pathways regulating selinexor sensitivity, we performed genome-wide CRISPR/Cas9 dropout screens using two B-ALL lines. We identified, for the first time, that paralogous DDX19A and DDX19B RNA helicases modulate selinexor sensitivity by regulating MCL1 mRNA nuclear export. While single depletion of either DDX19A or DDX19B barely altered MCL1 protein levels, depletion of both significantly attenuated MCL1 mRNA nuclear export, reducing MCL1 protein levels. Importantly, combining selinexor treatment with depletion of either DDX19A or DDX19B markedly induced intrinsic apoptosis of leukemia cells, an effect rescued by MCL1 overexpression. Analysis of Depmap datasets indicated that a subset of T-ALL lines expresses minimal DDX19B mRNA levels. Moreover, we found that either selinexor treatment or DDX19A depletion effectively induced apoptosis of T-ALL lines expressing low DDX19B levels. We conclude that XPO1 and DDX19A/B coordinately regulate cellular MCL1 levels and propose that DDX19A/B could serve as biomarkers for selinexor treatment. Moreover, pharmacological targeting of DDX19 paralogs may represent a potential strategy to induce intrinsic apoptosis in leukemia cells.","PeriodicalId":18109,"journal":{"name":"Leukemia","volume":null,"pages":null},"PeriodicalIF":12.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141580127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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