{"title":"Oncogenic Enhancers in Leukemia.","authors":"Roger Mulet-Lazaro, Ruud Delwel","doi":"10.1158/2643-3230.BCD-23-0211","DOIUrl":"10.1158/2643-3230.BCD-23-0211","url":null,"abstract":"<p><p>Although the study of leukemogenesis has traditionally focused on protein-coding genes, the role of enhancer dysregulation is becoming increasingly recognized. The advent of high-throughput sequencing, together with a better understanding of enhancer biology, has revealed how various genetic and epigenetic lesions produce oncogenic enhancers that drive transformation. These aberrations include translocations that lead to enhancer hijacking, point mutations that modulate enhancer activity, and copy number alterations that modify enhancer dosage. In this review, we describe these mechanisms in the context of leukemia and discuss potential therapeutic avenues to target these regulatory elements. Significance: Large-scale sequencing projects have uncovered recurrent gene mutations in leukemia, but the picture remains incomplete: some patients harbor no such aberrations, whereas others carry only a few that are insufficient to bring about transformation on their own. One of the missing pieces is enhancer dysfunction, which only recently has emerged as a critical driver of leukemogenesis. Knowledge of the various mechanisms of enhancer dysregulation is thus key for a complete understanding of leukemia and its causes, as well as the development of targeted therapies in the era of precision medicine.</p>","PeriodicalId":29944,"journal":{"name":"Blood Cancer Discovery","volume":" ","pages":"303-317"},"PeriodicalIF":11.5,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369600/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141876228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Federico Stella, Annalisa Chiappella, Beatrice Casadei, Stefania Bramanti, Silva Ljevar, Patrizia Chiusolo, Alice Di Rocco, Maria C Tisi, Matteo G Carrabba, Ilaria Cutini, Massimo Martino, Anna Dodero, Francesca Bonifazi, Armando Santoro, Federica Sorà, Barbara Botto, Anna M Barbui, Domenico Russo, Maurizio Musso, Giovanni Grillo, Mauro Krampera, Jacopo Olivieri, Marco Ladetto, Federica Cavallo, Massimo Massaia, Luca Arcaini, Martina Pennisi, Pier L Zinzani, Rosalba Miceli, Paolo Corradini
{"title":"A Multicenter Real-life Prospective Study of Axicabtagene Ciloleucel versus Tisagenlecleucel Toxicity and Outcomes in Large B-cell Lymphomas.","authors":"Federico Stella, Annalisa Chiappella, Beatrice Casadei, Stefania Bramanti, Silva Ljevar, Patrizia Chiusolo, Alice Di Rocco, Maria C Tisi, Matteo G Carrabba, Ilaria Cutini, Massimo Martino, Anna Dodero, Francesca Bonifazi, Armando Santoro, Federica Sorà, Barbara Botto, Anna M Barbui, Domenico Russo, Maurizio Musso, Giovanni Grillo, Mauro Krampera, Jacopo Olivieri, Marco Ladetto, Federica Cavallo, Massimo Massaia, Luca Arcaini, Martina Pennisi, Pier L Zinzani, Rosalba Miceli, Paolo Corradini","doi":"10.1158/2643-3230.BCD-24-0052","DOIUrl":"10.1158/2643-3230.BCD-24-0052","url":null,"abstract":"<p><p>This real-world prospective observational study across 21 Italian centers (CART-SIE) compares axicabtagene ciloleucel (axi-cel) and tisagenlecleucel (tisa-cel) outcomes in 485 patients with relapsed/refractory large B-cell lymphoma with baseline characteristics matched by stabilized inverse propensity score weighting. Axi-cel versus tisa-cel had higher all-grade cytokine release syndrome (78.6% vs. 89.3%, P = 0.0017) and neurotoxicity (9.9% vs. 32.2%, P < 0.0001) but also superior progression-free survival (PFS) at 1 year (46.5% vs. 34.1%, P = 0.0009). Even among patients who failed bridging therapy, axi-cel PFS was superior to tisa-cel (37.5% vs. 22.7%, P = 0.0059). Differences in overall survival and high-grade immune toxicities were not significant. The CAR-HEMATOTOX score not only predicted hematologic toxicity but also 1-year survival outcomes (51.5% in CAR-HEMATOTOX high vs. 77.2% in CAR-HEMATOTOX low, P < 0.0001). Twenty patients developed second primary malignancies, including two cases of T-cell neoplasms. These findings enable more informed selection of anti-CD19 CAR T-cell therapy, balancing bridging, safety, and efficacy considerations for individual patients. Significance: The findings of this study on 485 patients with relapsed/refractory large B-cell lymphoma treated with commercial axi-cel and tisa-cel indicate axi-cel's superior PFS after propensity score weighting. The predictive utility of CAR-HEMATOTOX in assessing not only toxicity but also outcomes across both CAR T-cell products may guide future risk-stratified management strategies.</p>","PeriodicalId":29944,"journal":{"name":"Blood Cancer Discovery","volume":" ","pages":"318-330"},"PeriodicalIF":11.5,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11369587/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141493710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"CAR T-cell Resistance to Oncogenic Transformation.","authors":"Marco Ruella, Carl H June","doi":"10.1158/2643-3230.BCD-23-0273","DOIUrl":"10.1158/2643-3230.BCD-23-0273","url":null,"abstract":"<p><p>In this commentary, we discuss the investigation into reports of T-cell malignancies following chimeric antigen receptor T-cell therapy. We argue that although these cases should be thoroughly examined, current data suggest that such risks with autologous chimeric antigen receptor T cells are remarkably low compared with other cancer treatments. We also emphasize the importance of continued research, transparent reporting, and participation in postauthorization safety studies.</p>","PeriodicalId":29944,"journal":{"name":"Blood Cancer Discovery","volume":" ","pages":"229-233"},"PeriodicalIF":11.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11215395/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140877472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Meir Rozenbaum, Reut Fluss, Victoria Marcu-Malina, Ifat Sarouk, Amilia Meir, Sarah Elitzur, Tal Zinger, Jasmine Jacob-Hirsch, Efrat G Saar, Gideon Rechavi, Elad Jacoby
{"title":"Genotoxicity Associated with Retroviral CAR Transduction of ATM-Deficient T Cells.","authors":"Meir Rozenbaum, Reut Fluss, Victoria Marcu-Malina, Ifat Sarouk, Amilia Meir, Sarah Elitzur, Tal Zinger, Jasmine Jacob-Hirsch, Efrat G Saar, Gideon Rechavi, Elad Jacoby","doi":"10.1158/2643-3230.BCD-23-0268","DOIUrl":"10.1158/2643-3230.BCD-23-0268","url":null,"abstract":"<p><p>Somatic variants in DNA damage response genes such as ATM are widespread in hematologic malignancies. ATM protein is essential for double-strand DNA break repair. Germline ATM deficiencies underlie ataxia-telangiectasia (A-T), a disease manifested by radiosensitivity, immunodeficiency, and predisposition to lymphoid malignancies. Patients with A-T diagnosed with malignancies have poor tolerance to chemotherapy or radiation. In this study, we investigated chimeric antigen receptor (CAR) T cells using primary T cells from patients with A-T (ATM-/-), heterozygote donors (ATM+/-), and healthy donors. ATM-/- T cells proliferate and can be successfully transduced with CARs, though functional impairment of ATM-/- CAR T-cells was observed. Retroviral transduction of the CAR in ATM-/- T cells resulted in high rates of chromosomal lesions at CAR insertion sites, as confirmed by next-generation long-read sequencing. This work suggests that ATM is essential to preserve genome integrity of CAR T-cells during retroviral manufacturing, and its lack poses a risk of chromosomal translocations and potential leukemogenicity. Significance: CAR T-cells are clinically approved genetically modified cells, but the control of genome integrity remains largely uncharacterized. This study demonstrates that ATM deficiency marginally impairs CAR T-cell function and results in high rates of chromosomal aberrations after retroviral transduction, which may be of concern in patients with DNA repair deficiencies.</p>","PeriodicalId":29944,"journal":{"name":"Blood Cancer Discovery","volume":" ","pages":"267-275"},"PeriodicalIF":11.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11215369/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140923531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
George Mo, Sang Y Lee, David G Coffey, Valentin Voillet, Ilan R Kirsch, Raphael Gottardo, Kimberly S Smythe, Cecilia C S Yeung, Adam Greenbaum, Damian J Green, David G Maloney, Brian G Till
{"title":"Long-term Remissions Following CD20-Directed Chimeric Antigen Receptor-Adoptive T-cell Therapy.","authors":"George Mo, Sang Y Lee, David G Coffey, Valentin Voillet, Ilan R Kirsch, Raphael Gottardo, Kimberly S Smythe, Cecilia C S Yeung, Adam Greenbaum, Damian J Green, David G Maloney, Brian G Till","doi":"10.1158/2643-3230.BCD-23-0263","DOIUrl":"10.1158/2643-3230.BCD-23-0263","url":null,"abstract":"<p><p>Chimeric antigen receptor (CAR) T-cell therapy produces high response rates in refractory B-cell non-Hodgkin lymphoma, but long-term data are minimal to date. In this study, we present long-term follow-up of a pilot trial testing a CD20-targeting third-generation CAR in patients with relapsed B-cell lymphomas following cyclophosphamide-only lymphodepletion. Two of the three patients in the trial, with mantle cell lymphoma and follicular lymphoma, had remissions lasting more than 7 years, though they ultimately relapsed. The absence of B-cell aplasia in both patients suggested a lack of functional CAR T-cell persistence, leading to the hypothesis that endogenous immune responses were responsible for these long-term remissions. Correlative immunologic analyses supported this hypothesis, with evidence of new humoral and cellular antitumor immune responses proximal to clinical response time points. Collectively, our results suggest that CAR T-cell therapy may facilitate epitope spreading and endogenous immune response formation in lymphomas. Significance: Two of three patients treated with CD20-targeted CAR T-cell therapy had long-term remissions, with evidence of endogenous antitumor immune response formation. Further investigation is warranted to develop conditions that promote epitope spreading in lymphomas.</p>","PeriodicalId":29944,"journal":{"name":"Blood Cancer Discovery","volume":" ","pages":"258-266"},"PeriodicalIF":11.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11215399/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140923532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Fate(s) of CAR T-Cell Therapy: Navigating the Risks of CAR+ T-Cell Malignancy.","authors":"Mohamed Abou-El-Enein","doi":"10.1158/2643-3230.BCD-23-0272","DOIUrl":"10.1158/2643-3230.BCD-23-0272","url":null,"abstract":"<p><p>The introduction of chimeric antigen receptor (CAR) T-cell therapy represents a landmark advancement in treating resistant forms of cancer such as leukemia, lymphoma, and myeloma. However, concerns about long-term safety have emerged following an FDA investigation into reports of second primary malignancies (SPM) after CAR-T cell treatment. This review offers a thorough examination of how genetically modified T cells might transform into CAR+ SPM. It explores genetic and molecular pathways leading to T-cell lymphomagenesis, the balance between CAR T-cell persistence, stemness, and oncogenic risk, and the trade-off of T-cell exhaustion, which may limit therapy efficacy but potentially reduce lymphomagenesis risk. Significance: An FDA probe into 22 cases of second primary T-cell malignancies following CAR T-cell therapy stresses the need to investigate their origins. Few may arise from preexisting genetic and epigenetic alterations and those introduced during therapeutic engineering. Technological advances, regulatory oversight, and patient monitoring are essential to mitigate potential risks.</p>","PeriodicalId":29944,"journal":{"name":"Blood Cancer Discovery","volume":" ","pages":"249-257"},"PeriodicalIF":11.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11215381/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140877473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nicole D Vincelette, Xiaoqing Yu, Andrew T Kuykendall, Jungwon Moon, Siyuan Su, Chia-Ho Cheng, Rinzine Sammut, Tiffany N Razabdouski, Hai V Nguyen, Erika A Eksioglu, Onyee Chan, Najla Al Ali, Parth C Patel, Dae H Lee, Shima Nakanishi, Renan B Ferreira, Elizabeth Hyjek, Qianxing Mo, Suzanne Cory, Harshani R Lawrence, Ling Zhang, Daniel J Murphy, Rami S Komrokji, Daesung Lee, Scott H Kaufmann, John L Cleveland, Seongseok Yun
{"title":"Trisomy 8 Defines a Distinct Subtype of Myeloproliferative Neoplasms Driven by the MYC-Alarmin Axis.","authors":"Nicole D Vincelette, Xiaoqing Yu, Andrew T Kuykendall, Jungwon Moon, Siyuan Su, Chia-Ho Cheng, Rinzine Sammut, Tiffany N Razabdouski, Hai V Nguyen, Erika A Eksioglu, Onyee Chan, Najla Al Ali, Parth C Patel, Dae H Lee, Shima Nakanishi, Renan B Ferreira, Elizabeth Hyjek, Qianxing Mo, Suzanne Cory, Harshani R Lawrence, Ling Zhang, Daniel J Murphy, Rami S Komrokji, Daesung Lee, Scott H Kaufmann, John L Cleveland, Seongseok Yun","doi":"10.1158/2643-3230.BCD-23-0210","DOIUrl":"10.1158/2643-3230.BCD-23-0210","url":null,"abstract":"<p><p>Despite advances in understanding the genetic abnormalities in myeloproliferative neoplasms (MPN) and the development of JAK2 inhibitors, there is an urgent need to devise new treatment strategies, particularly for patients with triple-negative (TN) myelofibrosis (MF) who lack mutations in the JAK2 kinase pathway and have very poor clinical outcomes. Here we report that MYC copy number gain and increased MYC expression frequently occur in TN-MF and that MYC-directed activation of S100A9, an alarmin protein that plays pivotal roles in inflammation and innate immunity, is necessary and sufficient to drive development and progression of MF. Notably, the MYC-S100A9 circuit provokes a complex network of inflammatory signaling that involves numerous hematopoietic cell types in the bone marrow microenvironment. Accordingly, genetic ablation of S100A9 or treatment with small molecules targeting the MYC-S100A9 pathway effectively ameliorates MF phenotypes, highlighting the MYC-alarmin axis as a novel therapeutic vulnerability for this subgroup of MPNs. Significance: This study establishes that MYC expression is increased in TN-MPNs via trisomy 8, that a MYC-S100A9 circuit manifest in these cases is sufficient to provoke myelofibrosis and inflammation in diverse hematopoietic cell types in the BM niche, and that the MYC-S100A9 circuit is targetable in TN-MPNs.</p>","PeriodicalId":29944,"journal":{"name":"Blood Cancer Discovery","volume":" ","pages":"276-297"},"PeriodicalIF":11.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11215389/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140853706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cecilia Restelli, Marco Ruella, Luca Paruzzo, Corrado Tarella, Pier Giuseppe Pelicci, Emanuela Colombo
{"title":"Recent Advances in Immune-Based Therapies for Acute Myeloid Leukemia.","authors":"Cecilia Restelli, Marco Ruella, Luca Paruzzo, Corrado Tarella, Pier Giuseppe Pelicci, Emanuela Colombo","doi":"10.1158/2643-3230.BCD-23-0202","DOIUrl":"10.1158/2643-3230.BCD-23-0202","url":null,"abstract":"<p><p>Despite advancements, acute myeloid leukemia (AML) remains unconquered by current therapies. Evidence of immune evasion during AML progression, such as HLA loss and T-cell exhaustion, suggests that antileukemic immune responses contribute to disease control and could be harnessed by immunotherapy. In this review, we discuss a spectrum of AML immunotherapy targets, encompassing cancer cell-intrinsic and surface antigens as well as targeting in the leukemic milieu, and how they can be tailored for personalized approaches. These targets are overviewed across major immunotherapy modalities applied to AML: immune checkpoint inhibitors, antibody-drug conjugates, therapeutic vaccines, bispecific/trispecific antibodies, and chimeric antigen receptor (CAR)-T and CAR-NK cells. Significance: Immune therapies in AML treatment show evolving promise. Ongoing research aims to customize approaches for varied patient profiles and clinical scenarios. This review covers immune surveillance mechanisms, therapy options like checkpoint inhibitors, antibodies, CAR-T/NK cells, and vaccines, as well as resistance mechanisms and microenvironment considerations.</p>","PeriodicalId":29944,"journal":{"name":"Blood Cancer Discovery","volume":" ","pages":"234-248"},"PeriodicalIF":11.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11215380/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141432956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Andrew L Young, Hannah C Davis, Maggie J Cox, Tyler M Parsons, Samantha C Burkart, Diane E Bender, Lulu Sun, Stephen T Oh, Grant A Challen
{"title":"Spatial Mapping of Hematopoietic Clones in Human Bone Marrow.","authors":"Andrew L Young, Hannah C Davis, Maggie J Cox, Tyler M Parsons, Samantha C Burkart, Diane E Bender, Lulu Sun, Stephen T Oh, Grant A Challen","doi":"10.1158/2643-3230.BCD-23-0110","DOIUrl":"10.1158/2643-3230.BCD-23-0110","url":null,"abstract":"<p><p>Clonal hematopoiesis (CH) is the expansion of somatically mutated cells in the hematopoietic compartment of individuals without hematopoietic dysfunction. Large CH clones (i.e., >2% variant allele fraction) predispose to hematologic malignancy, but CH is detected at lower levels in nearly all middle-aged individuals. Prior work has extensively characterized CH in peripheral blood, but the spatial distribution of hematopoietic clones in human bone marrow is largely undescribed. To understand CH at this level, we developed a method for spatially aware somatic mutation profiling and characterized the bone marrow of a patient with polycythemia vera. We identified the complex clonal distribution of somatic mutations in the hematopoietic compartment, the restriction of somatic mutations to specific subpopulations of hematopoietic cells, and spatial constraints of these clones in the bone marrow. This proof of principle paves the way to answering fundamental questions regarding CH spatial organization and factors driving CH expansion and malignant transformation in the bone marrow.</p><p><strong>Significance: </strong>CH occurs commonly in humans and can predispose to hematologic malignancy. Although well characterized in blood, it is poorly understood how clones are spatially distributed in the bone marrow. To answer this, we developed methods for spatially aware somatic mutation profiling to describe clonal heterogeneity in human bone marrow. See related commentary by Austin and Aifantis, p. 139.</p>","PeriodicalId":29944,"journal":{"name":"Blood Cancer Discovery","volume":" ","pages":"153-163"},"PeriodicalIF":11.5,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11062237/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139991301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Caner Saygin, Pu Zhang, Jacob Stauber, Ibrahim Aldoss, Adam S Sperling, Lachelle D Weeks, Marlise R Luskin, Todd C Knepper, Pankhuri Wanjari, Peng Wang, Angela M Lager, Carrie Fitzpatrick, Jeremy P Segal, Mehdi Gharghabi, Sandeep Gurbuxani, Girish Venkataraman, Jason X Cheng, Bart J Eisfelder, Oliver Bohorquez, Anand A Patel, Sheethal Umesh Nagalakshmi, Savita Jayaram, Olatoyosi M Odenike, Richard A Larson, Lucy A Godley, Daniel A Arber, Christopher J Gibson, Nikhil C Munshi, Guido Marcucci, Benjamin L Ebert, John M Greally, Ulrich Steidl, Rosa Lapalombella, Bijal D Shah, Wendy Stock
{"title":"Acute Lymphoblastic Leukemia with Myeloid Mutations Is a High-Risk Disease Associated with Clonal Hematopoiesis.","authors":"Caner Saygin, Pu Zhang, Jacob Stauber, Ibrahim Aldoss, Adam S Sperling, Lachelle D Weeks, Marlise R Luskin, Todd C Knepper, Pankhuri Wanjari, Peng Wang, Angela M Lager, Carrie Fitzpatrick, Jeremy P Segal, Mehdi Gharghabi, Sandeep Gurbuxani, Girish Venkataraman, Jason X Cheng, Bart J Eisfelder, Oliver Bohorquez, Anand A Patel, Sheethal Umesh Nagalakshmi, Savita Jayaram, Olatoyosi M Odenike, Richard A Larson, Lucy A Godley, Daniel A Arber, Christopher J Gibson, Nikhil C Munshi, Guido Marcucci, Benjamin L Ebert, John M Greally, Ulrich Steidl, Rosa Lapalombella, Bijal D Shah, Wendy Stock","doi":"10.1158/2643-3230.BCD-23-0106","DOIUrl":"10.1158/2643-3230.BCD-23-0106","url":null,"abstract":"<p><p>Myeloid neoplasms arise from preexisting clonal hematopoiesis (CH); however, the role of CH in the pathogenesis of acute lymphoblastic leukemia (ALL) is unknown. We found that 18% of adult ALL cases harbored TP53, and 16% had myeloid CH-associated gene mutations. ALL with myeloid mutations (MyM) had distinct genetic and clinical characteristics, associated with inferior survival. By using single-cell proteogenomic analysis, we demonstrated that myeloid mutations were present years before the diagnosis of ALL, and a subset of these clones expanded over time to manifest as dominant clones in ALL. Single-cell RNA sequencing revealed upregulation of genes associated with cell survival and resistance to apoptosis in B-ALL with MyM, which responds better to newer immunotherapeutic approaches. These findings define ALL with MyM as a high-risk disease that can arise from antecedent CH and offer new mechanistic insights to develop better therapeutic and preventative strategies.</p><p><strong>Significance: </strong>CH is a precursor lesion for lymphoblastic leukemogenesis. ALL with MyM has distinct genetic and clinical characteristics, associated with adverse survival outcomes after chemotherapy. CH can precede ALL years before diagnosis, and ALL with MyM is enriched with activated T cells that respond to immunotherapies such as blinatumomab. See related commentary by Iacobucci, p. 142.</p>","PeriodicalId":29944,"journal":{"name":"Blood Cancer Discovery","volume":" ","pages":"164-179"},"PeriodicalIF":11.5,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11061587/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139040498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}