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Olejarz W, Sadowski K, Szulczyk D, Basak G. Advancements in Personalized CAR-T Therapy: Comprehensive Overview of Biomarkers and Therapeutic Targets in Hematological Malignancies. Int J Mol Sci 2024; 25:7743. [PMID: 39062986 PMCID: PMC11276786 DOI: 10.3390/ijms25147743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2024] [Revised: 07/12/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
Chimeric antigen receptor T-cell (CAR-T) therapy is a novel anticancer therapy using autologous or allogeneic T-cells. To date, six CAR-T therapies for specific B-cell acute lymphoblastic leukemia (B-ALL), non-Hodgkin lymphomas (NHL), and multiple myeloma (MM) have been approved by the Food and Drug Administration (FDA). Significant barriers to the effectiveness of CAR-T therapy include cytokine release syndrome (CRS), neurotoxicity in the case of Allogeneic Stem Cell Transplantation (Allo-SCT) graft-versus-host-disease (GVHD), antigen escape, modest antitumor activity, restricted trafficking, limited persistence, the immunosuppressive microenvironment, and senescence and exhaustion of CAR-Ts. Furthermore, cancer drug resistance remains a major problem in clinical practice. CAR-T therapy, in combination with checkpoint blockades and bispecific T-cell engagers (BiTEs) or other drugs, appears to be an appealing anticancer strategy. Many of these agents have shown impressive results, combining efficacy with tolerability. Biomarkers like extracellular vesicles (EVs), cell-free DNA (cfDNA), circulating tumor (ctDNA) and miRNAs may play an important role in toxicity, relapse assessment, and efficacy prediction, and can be implicated in clinical applications of CAR-T therapy and in establishing safe and efficacious personalized medicine. However, further research is required to fully comprehend the particular side effects of immunomodulation, to ascertain the best order and combination of this medication with conventional chemotherapy and targeted therapies, and to find reliable predictive biomarkers.
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Affiliation(s)
- Wioletta Olejarz
- Department of Biochemistry and Pharmacogenomics, Faculty of Pharmacy, Medical University of Warsaw, 02-097 Warsaw, Poland;
- Centre for Preclinical Research, Medical University of Warsaw, 02-097 Warsaw, Poland
| | - Karol Sadowski
- Department of Biochemistry and Pharmacogenomics, Faculty of Pharmacy, Medical University of Warsaw, 02-097 Warsaw, Poland;
- Centre for Preclinical Research, Medical University of Warsaw, 02-097 Warsaw, Poland
- Department of Hematology, Transplantation and Internal Medicine, Medical University of Warsaw, 02-097 Warsaw, Poland;
| | - Daniel Szulczyk
- Chair and Department of Biochemistry, The Medical University of Warsaw, 02-097 Warsaw, Poland;
| | - Grzegorz Basak
- Department of Hematology, Transplantation and Internal Medicine, Medical University of Warsaw, 02-097 Warsaw, Poland;
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2
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Spinner MA, Advani RH. Emerging immunotherapies in the Hodgkin lymphoma armamentarium. Expert Opin Emerg Drugs 2024:1-13. [PMID: 38676917 DOI: 10.1080/14728214.2024.2349083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 04/25/2024] [Indexed: 04/29/2024]
Abstract
INTRODUCTION Brentuximab vedotin and PD-1 inhibitors have improved outcomes for classic Hodgkin lymphoma (cHL), but better therapies are needed for patients who relapse after these agents. Based on an improved understanding of cHL biology, there is a robust pipeline of novel therapies in development. In this review, we highlight emerging immunotherapeutic agents and combinations for cHL. AREAS COVERED We review clinical trials of novel PD-1/PD-L1 inhibitors beyond FDA-approved agents, checkpoint inhibitors targeting CTLA-4, LAG-3, TIM-3, TIGIT, and CD47/SIRPα, PD-1 inhibitor combinations with immunomodulatory agents and epigenetic modifying therapies, antibody-drug conjugates, bispecific antibodies, and cellular therapies including anti-CD30 CAR-T and allogeneic NK cell therapy. We review the key safety and efficacy data from published phase 1-2 studies and highlight trials in progress, including the first phase 3 trial for PD-1 inhibitor-refractory cHL. EXPERT OPINION Many novel immunotherapies hold great promise in cHL. Rational combinations with existing agents and next-generation antibody and CAR-T constructs may improve response rates and durability. Identifying biomarkers of response to these immunotherapies and using more sensitive tools to assess response, such as circulating tumor DNA, may further inform treatment decisions and enable a precision medicine approach in the future.
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Affiliation(s)
- Michael A Spinner
- Division of Hematology/Oncology, Department of Medicine, University of California, San Francisco, CA, USA
| | - Ranjana H Advani
- Division of Oncology, Department of Medicine, Stanford University, Stanford, CA, USA
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3
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Gao C, Li X, Xu Y, Zhang T, Zhu H, Yao D. Recent advances in CAR-T cell therapy for acute myeloid leukaemia. J Cell Mol Med 2024; 28:e18369. [PMID: 38712978 PMCID: PMC11075639 DOI: 10.1111/jcmm.18369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 02/18/2024] [Accepted: 04/17/2024] [Indexed: 05/08/2024] Open
Abstract
Acute myeloid leukaemia (AML) is a fatal and refractory haematologic cancer that primarily affects adults. It interferes with bone marrow cell proliferation. Patients have a 5 years survival rate of less than 30% despite the availability of several treatments, including chemotherapy, allogeneic haematopoietic stem cell transplantation (Allo-HSCT), and receptor antagonist drugs. Allo-HSCT is the mainstay of acute myeloid leukaemia treatment. Although it does work, there are severe side effects, such as graft-versus-host disease (GVHD). In recent years, chimeric antigen receptor (CAR)-T cell therapies have made significant progress in the treatment of cancer. These engineered T cells can locate and recognize tumour cells in vivo and release a large number of effectors through immune action to effectively kill tumour cells. CAR-T cells are among the most effective cancer treatments because of this property. CAR-T cells have demonstrated positive therapeutic results in the treatment of acute myeloid leukaemia, according to numerous clinical investigations. This review highlights recent progress in new targets for AML immunotherapy, and the limitations, and difficulties of CAR-T therapy for AML.
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Affiliation(s)
- Chi Gao
- College of Life Science and HealthWuhan University of Science and TechnologyWuhanChina
| | - Xin Li
- College of BiotechnologyTianjin University of Science and TechnologyTianjinChina
| | - Yao Xu
- College of Life Science and HealthWuhan University of Science and TechnologyWuhanChina
| | - Tongcun Zhang
- College of Life Science and HealthWuhan University of Science and TechnologyWuhanChina
- Institute of Biology and MedicineWuhan University of Science and TechnologyWuhanChina
| | - Haichuan Zhu
- College of Life Science and HealthWuhan University of Science and TechnologyWuhanChina
| | - Di Yao
- College of Life Science and HealthWuhan University of Science and TechnologyWuhanChina
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4
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Rujirachaivej P, Siriboonpiputtana T, Luangwattananun P, Yuti P, Wutti-In Y, Choomee K, Sujjitjoon J, Chareonsirisuthigul T, Rerkamnuaychoke B, Junking M, Yenchitsomanus PT. Therapeutic potential of third-generation chimeric antigen receptor T cells targeting B cell maturation antigen for treating multiple myeloma. Clin Exp Med 2024; 24:90. [PMID: 38683232 PMCID: PMC11058938 DOI: 10.1007/s10238-024-01347-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 04/03/2024] [Indexed: 05/01/2024]
Abstract
Multiple myeloma (MM) is an incurable hematologic malignancy characterized by the rapid proliferation of malignant plasma cells within the bone marrow. Standard therapies often fail due to patient resistance. The US FDA has approved second-generation chimeric antigen receptor (CAR) T cells targeting B-cell maturation antigen (anti-BCMA-CAR2 T cells) for MM treatment. However, achieving enduring clinical responses remains a challenge in CAR T cell therapy. This study developed third-generation T cells with an anti-BCMA CAR (anti-BCMA-CAR3). The CAR incorporated a fully human scFv specific to BCMA, linked to the CD8 hinge region. The design included the CD28 transmembrane domain, two co-stimulatory domains (CD28 and 4-1BB), and the CD3ζ signaling domain (28BBζ). Lentiviral technology generated these modified T cells, which were compared against anti-BCMA-CAR2 T cells for efficacy against cancer. Anti-BCMA-CAR3 T cells exhibited significantly higher cytotoxic activity against BCMA-expressing cells (KMS-12-PE and NCI-H929) compared to anti-BCMA-CAR2 T cells. At an effector-to-target ratio of 10:1, anti-BCMA-CAR3 T cells induced lysis in 75.5 ± 3.8% of NCI-H929 cells, whereas anti-BCMA-CAR2 T cells achieved 56.7 ± 3.4% (p = 0.0023). Notably, after twelve days of cultivation, anti-BCMA-CAR3 T cells nearly eradicated BCMA-positive cells (4.1 ± 2.1%), while anti-BCMA-CAR2 T cells allowed 36.8 ± 20.1% to survive. This study highlights the superior efficacy of anti-BCMA-CAR3 T cells against both low and high BCMA-expressing MM cells, surpassing anti-BCMA-CAR2 T cells. These findings suggest potential for advancing anti-BCMA-CAR3 T cells in chimeric antigen receptor T (CAR-T) therapy for relapsed/refractory MM.
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Affiliation(s)
- Punchita Rujirachaivej
- Graduate Program in Clinical Pathology, Department of Pathology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | | | - Piriya Luangwattananun
- Siriraj Center of Research Excellence for Cancer Immunotherapy (SiCORE-CIT) and Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand
- Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pornpimon Yuti
- Siriraj Center of Research Excellence for Cancer Immunotherapy (SiCORE-CIT) and Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand
- Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Yupanun Wutti-In
- Division of Transfusion Science, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Kornkan Choomee
- Siriraj Center of Research Excellence for Cancer Immunotherapy (SiCORE-CIT) and Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand
- Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Jatuporn Sujjitjoon
- Siriraj Center of Research Excellence for Cancer Immunotherapy (SiCORE-CIT) and Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand
- Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Takol Chareonsirisuthigul
- Department of Pathology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Budsaba Rerkamnuaychoke
- Department of Pathology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Mutita Junking
- Siriraj Center of Research Excellence for Cancer Immunotherapy (SiCORE-CIT) and Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand.
- Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
| | - Pa-Thai Yenchitsomanus
- Siriraj Center of Research Excellence for Cancer Immunotherapy (SiCORE-CIT) and Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand.
- Division of Molecular Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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Pang Y, Ghosh N. Novel and multiple targets for chimeric antigen receptor-based therapies in lymphoma. Front Oncol 2024; 14:1396395. [PMID: 38711850 PMCID: PMC11070555 DOI: 10.3389/fonc.2024.1396395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 04/08/2024] [Indexed: 05/08/2024] Open
Abstract
Chimeric antigen receptor (CAR) T-cell therapy targeting CD19 in B-cell non-Hodgkin lymphoma (NHL) validates the utility of CAR-based therapy for lymphomatous malignancies. Despite the success, treatment failure due to CD19 antigen loss, mutation, or down-regulation remains the main obstacle to cure. On-target, off-tumor effect of CD19-CAR T leads to side effects such as prolonged B-cell aplasia, limiting the application of therapy in indolent diseases such as chronic lymphocytic leukemia (CLL). Alternative CAR targets and multi-specific CAR are potential solutions to improving cellular therapy outcomes in B-NHL. For Hodgkin lymphoma and T-cell lymphoma, several cell surface antigens have been studied as CAR targets, some of which already showed promising results in clinical trials. Some antigens are expressed by different lymphomas and could be used for designing tumor-agnostic CAR. Here, we reviewed the antigens that have been studied for novel CAR-based therapies, as well as CARs designed to target two or more antigens in the treatment of lymphoma.
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Affiliation(s)
- Yifan Pang
- Department of Hematologic Oncology and Blood Disorders, Atrium Health Levine Cancer Institute, Wake Forest School of Medicine, Charlotte, NC, United States
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Yu F, Wang J, Ke Z, Zhang Y, Xu L, Zhang H, Huang K, Cheng F, Yang H, Wang L, Wang Z, Shou L, Yu W, Fang H, Medeiros LJ, Wang W. EBV-positive Nodal T-Cell and NK-Cell Lymphoma: A Study of 26 Cases Including a Subset With Strong CD30 Expression Mimicking Anaplastic Large Cell Lymphoma. Am J Surg Pathol 2024; 48:406-416. [PMID: 38287746 DOI: 10.1097/pas.0000000000002184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
Epstein-Barr virus (EBV)-positive nodal T-cell and NK-cell lymphoma is a rare neoplasm of cytotoxic T-cell or NK-cell lineage. Here, we report 26 cases affecting 14 men and 12 women with a median age of 52 years. All patients presented with disease involving multiple lymph nodes, and 20 of 22 (91%) fully staged patients had advanced Ann Arbor stage disease. Spleen, liver, and bone marrow were involved in 70%, 50%, and 52% of cases, respectively. These patients had a dismal prognosis with a median survival of 30 days. Histologically, lymph nodes were replaced by lymphoma in a diffuse pattern. Lymphoma cells were variable in size and large cell morphology was seen in 62% of cases. The neoplastic cells were CD4-/CD8- in 14 (54%) cases and CD4-/CD8+ in 12 (46%) cases. CD56 was positive in 14 (54%) cases. CD30 was positive in 20 (77%) cases; a strong and diffuse pattern was observed in 14 (54%) cases, mimicking, in part, anaplastic large cell lymphoma (ALCL). CD30 expression was associated with younger age and large cell morphology. In summary, EBV+ nodal T-cell and NK-cell lymphoma is an aggressive disease with a poor prognosis. These neoplasms are heterogeneous at the morphologic and immunophenotypic levels. Diffuse and strong expression of CD30 could potentially lead to a misdiagnosis of ALCL if EBV evaluation is not performed. Distinguishing between EBV+ nodal T-cell and NK-cell lymphoma from ALCL is important because treatment strategy and prognosis differ. CD30 expression offers a potential therapeutic target for patients with this aggressive disease.
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Affiliation(s)
| | | | - Zhonghe Ke
- Shanghai Rightongene Biotechnology Co., Ltd., Shanghai
| | - Yafei Zhang
- Positron Emission Tomography (PET) Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou
| | | | | | | | | | | | | | | | - Lihong Shou
- Department of Hematology, Huzhou Central Hospital, Huzhou, China
| | | | - Hong Fang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - L Jeffrey Medeiros
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Wei Wang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
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7
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Ngu HS, Savage KJ. Past, present and future therapeutic approaches in nodal peripheral T-cell lymphomas. Haematologica 2023; 108:3211-3226. [PMID: 38037799 PMCID: PMC10690928 DOI: 10.3324/haematol.2021.280275] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 08/14/2023] [Indexed: 12/02/2023] Open
Abstract
Peripheral T-cell lymphomas (PTCL) encompass over 30 different entities and although they share post-thymic T- or NK-cell derivation, the disease biology and genomic landscape are very diverse across subtypes. In Western populations, nodal PTCL are the most frequently encountered entities in clinical practice and although important achievements have been made in deciphering the underlying biology and in therapeutic advances, there are still large gaps in disease understanding and clinical scenarios in which controversy over best practice continues. CHOP (cyclophosphamide, doxorubicin, vincristine, prednisone)- based chemotherapy continues to be the 'standard' treatment, with the addition of brentuximab vedotin (BV) in the combination CHP (cyclosphosphamide, doxorubicin, prednisone)-BV representing a new treatment paradigm in CD30+ PTCL although its benefit is less certain in the non-anaplastic large cell lymphoma subtypes. Given the high risk of relapse, consolidative autologous stem cell transplant is considered in nodal PTCL, outside of ALK-positive anaplastic large cell lymphoma; however, in the absence of a randomized controlled trials, practices vary. Beyond CHP-BV, most study activity has focused on adding a novel agent to CHOP (i.e., CHOP + drug X). However, with high complete remission rates observed with some novel therapy combinations, these regimens are being tested in the front-line setting, with a particular rationale in follicular helper T-cell lymphomas which have a clear sensitivity to epigenetic modifying therapies. This is well exemplified in the relapsed/refractory setting in which rational combination therapies are being developed for specific subtypes or guided by underlying biology. Taken together, we have finally moved into an era of a more personalized approach to the management of nodal PTCL.
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Affiliation(s)
- Henry S Ngu
- Center for Lymphoid Cancer, Division of Medical Oncology BC Cancer and the University of British Columbia, British Columbia, Vancouver
| | - Kerry J Savage
- Center for Lymphoid Cancer, Division of Medical Oncology BC Cancer and the University of British Columbia, British Columbia, Vancouver.
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8
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Vitale C, Griggio V, Perutelli F, Coscia M. CAR-modified Cellular Therapies in Chronic Lymphocytic Leukemia: Is the Uphill Road Getting Less Steep? Hemasphere 2023; 7:e988. [PMID: 38044959 PMCID: PMC10691795 DOI: 10.1097/hs9.0000000000000988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 10/23/2023] [Indexed: 12/05/2023] Open
Abstract
The clinical development of chimeric antigen receptor (CAR) T-cell therapy has been more challenging for chronic lymphocytic leukemia (CLL) compared to other settings. One of the main reasons is the CLL-associated state of immune dysfunction that specifically involves patient-derived T cells. Here, we provide an overview of the clinical results obtained with CAR T-cell therapy in CLL, describing the identified immunologic reasons for the inferior efficacy. Novel CAR T-cell formulations, such as lisocabtagene maraleucel, administered alone or in combination with the Bruton tyrosine kinase inhibitor ibrutinib, are currently under investigation. These approaches are based on the rationale that improving the quality of the T-cell source and of the CAR T-cell product may deliver a more functional therapeutic weapon. Further strategies to boost the efficacy of CAR T cells should rely not only on the production of CAR T cells with an improved cellular composition but also on additional changes. Such alterations could include (1) the coadministration of immunomodulatory agents capable of counteracting CLL-related immunological alterations, (2) the design of improved CAR constructs (such as third- and fourth-generation CARs), (3) the incorporation into the manufacturing process of immunomodulatory compounds overcoming the T-cell defects, and (4) the use of allogeneic CAR T cells or alternative CAR-modified cellular vectors. These strategies may allow to develop more effective CAR-modified cellular therapies capable of counteracting the more aggressive and still incurable forms of CLL.
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Affiliation(s)
- Candida Vitale
- University Division of Hematology, A.O.U. Città della Salute e della Scienza di Torino, Italy
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Italy
| | - Valentina Griggio
- University Division of Hematology, A.O.U. Città della Salute e della Scienza di Torino, Italy
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Italy
| | - Francesca Perutelli
- University Division of Hematology, A.O.U. Città della Salute e della Scienza di Torino, Italy
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Italy
| | - Marta Coscia
- University Division of Hematology, A.O.U. Città della Salute e della Scienza di Torino, Italy
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Italy
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9
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Zhang ZJ, Wu QF, Ren AQ, Chen Q, Shi JZ, Li JP, Liu XY, Zhang ZJ, Tang YZ, Zhao Y, Yao NN, Zhang XY, Liu CP, Dong G, Zhao JX, Xu MJ, Yue YQ, Hu J, Sun F, Liu Y, Ao QL, Zhou FL, Wu H, Zhang TC, Zhu HC. ATF4 renders human T-cell acute lymphoblastic leukemia cell resistance to FGFR1 inhibitors through amino acid metabolic reprogramming. Acta Pharmacol Sin 2023; 44:2282-2295. [PMID: 37280363 PMCID: PMC10618259 DOI: 10.1038/s41401-023-01108-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 05/09/2023] [Indexed: 06/08/2023] Open
Abstract
Abnormalities of FGFR1 have been reported in multiple malignancies, suggesting FGFR1 as a potential target for precision treatment, but drug resistance remains a formidable obstacle. In this study, we explored whether FGFR1 acted a therapeutic target in human T-cell acute lymphoblastic leukemia (T-ALL) and the molecular mechanisms underlying T-ALL cell resistance to FGFR1 inhibitors. We showed that FGFR1 was significantly upregulated in human T-ALL and inversely correlated with the prognosis of patients. Knockdown of FGFR1 suppressed T-ALL growth and progression both in vitro and in vivo. However, the T-ALL cells were resistant to FGFR1 inhibitors AZD4547 and PD-166866 even though FGFR1 signaling was specifically inhibited in the early stage. Mechanistically, we found that FGFR1 inhibitors markedly increased the expression of ATF4, which was a major initiator for T-ALL resistance to FGFR1 inhibitors. We further revealed that FGFR1 inhibitors induced expression of ATF4 through enhancing chromatin accessibility combined with translational activation via the GCN2-eIF2α pathway. Subsequently, ATF4 remodeled the amino acid metabolism by stimulating the expression of multiple metabolic genes ASNS, ASS1, PHGDH and SLC1A5, maintaining the activation of mTORC1, which contributed to the drug resistance in T-ALL cells. Targeting FGFR1 and mTOR exhibited synergistically anti-leukemic efficacy. These results reveal that FGFR1 is a potential therapeutic target in human T-ALL, and ATF4-mediated amino acid metabolic reprogramming contributes to the FGFR1 inhibitor resistance. Synergistically inhibiting FGFR1 and mTOR can overcome this obstacle in T-ALL therapy.
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Affiliation(s)
- Zi-Jian Zhang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Qi-Fang Wu
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - An-Qi Ren
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Qian Chen
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Jiang-Zhou Shi
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Jia-Peng Li
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
- School of Science, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Xi-Yu Liu
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Zhi-Jie Zhang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Yu-Zhe Tang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Yuan Zhao
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Ning-Ning Yao
- Peking-Tsinghua Center for Life Sciences, and Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
- The MOE Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Peking University, Beijing, 100871, China
| | - Xiao-Yu Zhang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Chang-Peng Liu
- Department of Medical Records, Office for DRGs (Diagnosis Related Groups), Henan Cancer Hospital, Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, 450003, China
| | - Ge Dong
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Jia-Xuan Zhao
- Key Lab of Industrial Fermentation Microbiology of the Ministry of Education & Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Mei-Jun Xu
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Yun-Qiang Yue
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Jia Hu
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Fan Sun
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Yu Liu
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China
| | - Qi-Lin Ao
- Institute of Pathology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
- Department of Pathology, School of Basic Medical Science, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Fu-Ling Zhou
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Hong Wu
- Peking-Tsinghua Center for Life Sciences, and Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
- The MOE Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Peking University, Beijing, 100871, China
| | - Tong-Cun Zhang
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China.
- Key Lab of Industrial Fermentation Microbiology of the Ministry of Education & Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China.
| | - Hai-Chuan Zhu
- Institute of Biology and Medicine, College of Life and Health Sciences, Wuhan University of Science and Technology, Wuhan, 430065, China.
- College of Life Science, Wuchang University of Technology, Wuhan, 430223, China.
- Synergy Innovation Center of Biological Peptide Antidiabetics of Hubei Province, College of Life Science, Wuchang University of Technology, Wuhan, 430223, China.
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10
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Randall MP, Spinner MA. Optimizing Treatment for Relapsed/Refractory Classic Hodgkin Lymphoma in the Era of Immunotherapy. Cancers (Basel) 2023; 15:4509. [PMID: 37760478 PMCID: PMC10526852 DOI: 10.3390/cancers15184509] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/04/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
Most patients with classic Hodgkin lymphoma (cHL) are cured with combination chemotherapy, but approximately 10-20% will relapse, and another 5-10% will have primary refractory disease. The treatment landscape of relapsed/refractory (R/R) cHL has evolved significantly over the past decade following the approval of brentuximab vedotin (BV), an anti-CD30 antibody-drug conjugate, and the PD-1 inhibitors nivolumab and pembrolizumab. These agents have significantly expanded options for salvage therapy prior to autologous hematopoietic cell transplantation (AHCT), post-transplant maintenance, and treatment of relapse after AHCT, which have led to improved survival in the modern era. In this review, we highlight our approach to the management of R/R cHL in 2023 with a focus on choosing first salvage therapy, post-transplant maintenance, and treatment of relapse after AHCT. We also discuss the management of older adults and transplant-ineligible patients, who require a separate approach. Finally, we review novel immunotherapy approaches in clinical trials, including combinations of PD-1 inhibitors with other immune-activating agents as well as novel antibody-drug conjugates, bispecific antibodies, and cellular immunotherapies. Ongoing studies assessing biomarkers of response to immunotherapy and dynamic biomarkers such as circulating tumor DNA may further inform treatment decisions and enable a more personalized approach in the future.
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Affiliation(s)
| | - Michael A. Spinner
- Division of Hematology/Oncology, Department of Medicine, University of California San Francisco, San Francisco, CA 94143, USA;
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Gromowsky MJ, D’Angelo CR, Lunning MA, Armitage JO. ALK-positive anaplastic large cell lymphoma in adults. Fac Rev 2023; 12:21. [PMID: 37655119 PMCID: PMC10467138 DOI: 10.12703/r/12-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023] Open
Abstract
ALK-positive anaplastic large cell lymphoma (ALCL) represents approximately 6-7% of the mature T-cell lymphomas. This subtype contains a translocation between the ALK gene on chromosome 2 and one of several other genes that together form an oncogene. The most frequent translocation is t(2;5) which combines ALK with NPM1. This lymphoma has a median age of 34 years, is more common in males, and is in advanced stage at the time of diagnosis in most patients. ALK-positive ALCL is the most curable of the peripheral T-cell lymphomas. The CHOP regimen has been most frequently used, but results are improved with the substitution of brentuximab vedotin for vincristine (BV-CHP) and the addition of etoposide (CHOEP), with BV-CHP being favored. Salvage therapies include allogeneic or autologous bone marrow transplantation, BV, if not used as part of the primary therapy, and ALK inhibitors. The latter are very active and likely to be incorporated into the primary therapy.
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Faber ML, Oldham RAA, Thakur A, Rademacher MJ, Kubicka E, Dlugi TA, Gifford SA, McKillop WM, Schloemer NJ, Lum LG, Medin JA. Novel anti-CD30/CD3 bispecific antibodies activate human T cells and mediate potent anti-tumor activity. Front Immunol 2023; 14:1225610. [PMID: 37646042 PMCID: PMC10461807 DOI: 10.3389/fimmu.2023.1225610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 07/12/2023] [Indexed: 09/01/2023] Open
Abstract
CD30 is expressed on Hodgkin lymphomas (HL), many non-Hodgkin lymphomas (NHLs), and non-lymphoid malignancies in children and adults. Tumor expression, combined with restricted expression in healthy tissues, identifies CD30 as a promising immunotherapy target. An anti-CD30 antibody-drug conjugate (ADC) has been approved by the FDA for HL. While anti-CD30 ADCs and chimeric antigen receptors (CARs) have shown promise, their shortcomings and toxicities suggest that alternative treatments are needed. We developed novel anti-CD30 x anti-CD3 bispecific antibodies (biAbs) to coat activated patient T cells (ATCs) ex vivo prior to autologous re-infusions. Our goal is to harness the dual specificity of the biAb, the power of cellular therapy, and the safety of non-genetically modified autologous T cell infusions. We present a comprehensive characterization of the CD30 binding and tumor cell killing properties of these biAbs. Five unique murine monoclonal antibodies (mAbs) were generated against the extracellular domain of human CD30. Resultant anti-CD30 mAbs were purified and screened for binding specificity, affinity, and epitope recognition. Two lead mAb candidates with unique sequences and CD30 binding clusters that differ from the ADC in clinical use were identified. These mAbs were chemically conjugated with OKT3 (an anti-CD3 mAb). ATCs were armed and evaluated in vitro for binding, cytokine production, and cytotoxicity against tumor lines and then in vivo for tumor cell killing. Our lead mAb was subcloned to make a Master Cell Bank (MCB) and screened for binding against a library of human cell surface proteins. Only huCD30 was bound. These studies support a clinical trial in development employing ex vivo-loading of autologous T cells with this novel biAb.
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Affiliation(s)
- Mary L. Faber
- Department of Pediatrics, Medical College of Wisconsin (MCW), Milwaukee, WI, United States
| | - Robyn A. A. Oldham
- Department of Pediatrics, Medical College of Wisconsin (MCW), Milwaukee, WI, United States
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - Archana Thakur
- Department of Medicine, Division of Hematology/Oncology, University of Virginia Cancer Center, Charlottesville, VA, United States
| | - Mary Jo Rademacher
- Department of Pediatrics, Medical College of Wisconsin (MCW), Milwaukee, WI, United States
| | - Ewa Kubicka
- Department of Medicine, Division of Hematology/Oncology, University of Virginia Cancer Center, Charlottesville, VA, United States
| | - Theresa A. Dlugi
- Department of Pediatrics, Medical College of Wisconsin (MCW), Milwaukee, WI, United States
| | - Steven A. Gifford
- Department of Pediatrics, Medical College of Wisconsin (MCW), Milwaukee, WI, United States
| | - William M. McKillop
- Department of Pediatrics, Medical College of Wisconsin (MCW), Milwaukee, WI, United States
| | - Nathan J. Schloemer
- Department of Pediatrics, Medical College of Wisconsin (MCW), Milwaukee, WI, United States
| | - Lawrence G. Lum
- Department of Medicine, Division of Hematology/Oncology, University of Virginia Cancer Center, Charlottesville, VA, United States
| | - Jeffrey A. Medin
- Department of Pediatrics, Medical College of Wisconsin (MCW), Milwaukee, WI, United States
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
- Department of Biochemistry, MCW, Milwaukee, WI, United States
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Bouzari B, Basi A, Dadkhah S, Panahi M, Mohammadi S. Programmed Death 1 (PD-1) Expression in Relapsing and Remitting Hodgkin Lymphoma as Prognostic Factor. Asian Pac J Cancer Prev 2023; 24:2829-2835. [PMID: 37642071 PMCID: PMC10685244 DOI: 10.31557/apjcp.2023.24.8.2829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 08/17/2023] [Indexed: 08/31/2023] Open
Abstract
BACKGROUND Programmed death ligand 1 (PD-L1) plays critical role in PD-1-dependent immunity suppress. Abnormal PD-L1 expression has shown to be directly related to poor prognosis and drug resistance in cancer patients. Hence, we aimed to evaluate PD-L1 expression in relapsing and remitting Hodgkin lymphoma (HL) as a prognostic factor. METHODS In this cross-sectional study, 100 patients with HL between 2007 and 2015, were included. A thin section of tumor tissue fixed and processed on slides, stained by immunohistochemistry (IHC) PD-L1 specific antibodies. The clinical, imaging and pathology information of patients were obtained using case reading and by retrospective follow-up. The status of recurrence or improvement was determined after 5 years of diagnosis. GraphPad Prism v.8 was used for analysis. RESULTS of 100 HL cases, the mean age of 33 relapsed group cases was significantly higher than remission group (p-value = 0.006), and gender was not significant however majority of cases in both groups were male. The frequency of PD-L1 expression found in 49% of all patients. A significant relationship was found between the expression of PD-L1 and disease progression, HL subtype, stage of tumor (p-value<0.05). High expression of PD-L1 found in majority of relapse group and low expression in remission group. CONCLUSION PD-L1 expression assessment in HL patients is a valuable tool for prediction of the disease subtype, progression, stage, and treatment outcome. IHC method as an available, simple, rather cheap, and efficient tool could use for evaluation of PD-L1 expression and predicting the prognosis of HL disease, elsewhere.
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Affiliation(s)
- Behnaz Bouzari
- Department of Pathology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Ali Basi
- Department of Hematology Oncology, School of Medicine, Firouzgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
| | - Shadi Dadkhah
- Department of Pathology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Mahshid Panahi
- Department of Pathology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Soha Mohammadi
- School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
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Jin Z, Xiang R, Qing K, Li D, Liu Z, Li X, Zhu H, Zhang Y, Wang L, Xue K, Liu H, Xu Z, Wang Y, Li J. Lenalidomide overcomes the resistance to third-generation CD19-CAR-T cell therapy in preclinical models of diffuse large B-cell lymphoma. Cell Oncol (Dordr) 2023:10.1007/s13402-023-00833-6. [PMID: 37219767 DOI: 10.1007/s13402-023-00833-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/17/2023] [Indexed: 05/24/2023] Open
Abstract
PURPOSE Chimeric antigen receptor (CAR)-T cells against CD19 have been proven to be effective in treating B-cell hematological malignancies. However, the efficacy of this promising therapy is limited by many factors. METHODS In this study, the germinal center B-cell-like diffuse large B-cell lymphoma (GCB-DLBCL) cell line OCI-Ly1, and patient-derived xenografted (PDX) mice (CY-DLBCL) were used as the CAR-T cell-resistant model. Meanwhile, the activated B-cell-like (ABC) DLBCL cell line OCI-Ly3 and PDX mice (ZML-DLBCL) were defined as the CAR-T sensitive model. The enhancement of CAR-T cell function by lenalidomide (LEN) was examined in vitro and in vivo. RESULTS Lenalidomide effectively enhanced the function of third-generation CD19-CAR-T cells by polarizing CD8+ CAR-T cells to CD8 early-differentiated stage and Th1 type, reducing CAR-T cell exhaustion and improving cell expansion. It was further demonstrated that CAR-T cells combined with LEN substantially reduce the tumor burden and prolong the survival time in various DLBCL mouse models. LEN was also found to promote the infiltration of CD19-CAR-T cells into the tumor site by modulating the tumor microenvironment. CONCLUSION In summary, the results of the present study suggest that LEN can improve the function of CD19-CAR-T cells, providing a basis for clinical trials using this combination therapy against DLBCL.
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Affiliation(s)
- Zhen Jin
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Rufang Xiang
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Department of General Practice, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Kai Qing
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Dan Li
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zhao Liu
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoyang Li
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Hongming Zhu
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yunxiang Zhang
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Lining Wang
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Kai Xue
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Han Liu
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zizhen Xu
- Faculty of Medical Laboratory Science, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yingxiao Wang
- Department of Bioengineering & Institute of Engineering in Medicine, University of California San Diego, La Jolla, CA, USA
| | - Junmin Li
- Shanghai Institute of Hematology, State Key Laboratory for Medical Genomics, National Research Center for Translational Medicine, Ruijin Hospital affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
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CAR T-Cell Immunotherapy Treating T-ALL: Challenges and Opportunities. Vaccines (Basel) 2023; 11:vaccines11010165. [PMID: 36680011 PMCID: PMC9861718 DOI: 10.3390/vaccines11010165] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/28/2022] [Accepted: 01/06/2023] [Indexed: 01/14/2023] Open
Abstract
T-cell acute lymphoblastic leukemia (T-ALL), a form of T-cell malignancy, is a typically aggressive hematological malignancy with high rates of disease relapse and a poor prognosis. Current guidelines do not recommend any specific treatments for these patients, and only allogeneic stem cell transplant, which is associated with potential risks and toxicities, is a curative therapy. Recent clinical trials showed that immunotherapies, including monoclonal antibodies, checkpoint inhibitors, and CAR T therapies, are successful in treating hematologic malignancies. CAR T cells, which specifically target the B-cell surface antigen CD19, have demonstrated remarkable efficacy in the treatment of B-cell acute leukemia, and some progress has been made in the treatment of other hematologic malignancies. However, the development of CAR T-cell immunotherapy targeting T-cell malignancies appears more challenging due to the potential risks of fratricide, T-cell aplasia, immunosuppression, and product contamination. In this review, we discuss the current status of and challenges related to CAR T-cell immunotherapy for T-ALL and review potential strategies to overcome these limitations.
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Recent Advances in the Development of Anti-FLT3 CAR T-Cell Therapies for Treatment of AML. Biomedicines 2022; 10:biomedicines10102441. [PMID: 36289703 PMCID: PMC9598885 DOI: 10.3390/biomedicines10102441] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 11/17/2022] Open
Abstract
Following the success of the anti-CD19 chimeric antigen receptor (CAR) T-cell therapies against B-cell malignancies, the CAR T-cell approach is being developed towards other malignancies like acute myeloid leukemia (AML). Treatment options for relapsed AML patients are limited, and the upregulation of the FMS-like tyrosine kinase 3 (FLT3) in malignant T-cells is currently not only being investigated as a prognostic factor, but also as a target for new treatment options. In this review, we provide an overview and discuss different approaches of current anti-FLT3 CAR T-cells under development. In general, these therapies are effective both in vitro and in vivo, however the safety profile still needs to be further investigated. The first clinical trials have been initiated, and the community now awaits clinical evaluation of the approach of targeting FLT3 with CAR T-cells.
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