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Yu L, Zou R, He J, Qu C. Role of radiation in chimeric antigen receptor T-cell therapy for patients with relapsed/refractory non-Hodgkin lymphoma: Current studies and future prospects. Crit Rev Oncol Hematol 2024; 199:104390. [PMID: 38782146 DOI: 10.1016/j.critrevonc.2024.104390] [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: 09/27/2023] [Revised: 05/14/2024] [Accepted: 05/17/2024] [Indexed: 05/25/2024] Open
Abstract
Chimeric antigen receptor T-cell (CAR-T) therapy has revolutionized the treatment approach for patients with relapsed/refractory non-Hodgkin lymphoma (R/R NHL). However, the long-term prognosis has been discouraging. Moreover, the urgent resolution of two critical issues is necessary: minimize tumor burden before CAR-T infusion and control fatal toxicities post CAR-T therapy. By combining radiotherapy (RT), the safety and efficacy of CAR-T can be improved. RT can serve as bridging therapy, reducing the tumor burden before CAR-T infusion, thus enabling safe and successful CAR-T infusion, and as salvage therapy in cases of CAR-T therapy failure. This review aims to discuss the current evidence supporting the use of RT in CAR-T therapy for patients with R/R NHL. Although most studies have shown a positive role of RT in combined modality treatments for patients undergoing CAR-T therapy, the synergy gained from these remains uncertain. Furthermore, the optimal dose/fraction and radiation response require further investigation.
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Affiliation(s)
- Lingzi Yu
- Department of Hematology, the First Affiliated Hospital of Soochow University, and Jiangsu Institute of Hematology, Suzhou 215000, China; National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215000, China; Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215000, China.
| | - Rui Zou
- Department of Hematology, the First Affiliated Hospital of Soochow University, and Jiangsu Institute of Hematology, Suzhou 215000, China; National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215000, China; Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215000, China.
| | - Jiajie He
- Department of Hematology, the First Affiliated Hospital of Soochow University, and Jiangsu Institute of Hematology, Suzhou 215000, China; National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215000, China; Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215000, China.
| | - Changju Qu
- Department of Hematology, the First Affiliated Hospital of Soochow University, and Jiangsu Institute of Hematology, Suzhou 215000, China; National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou 215000, China; Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou 215000, China.
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2
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Morris BA, Merfeld EC, Burr AR, Bradley KA, Fletcher CD. Combining Obinutuzumab With Radiation for Refractory DLBCL: Retrospective Safety and Efficacy Analysis. Adv Radiat Oncol 2024; 9:101524. [PMID: 38799107 PMCID: PMC11127189 DOI: 10.1016/j.adro.2024.101524] [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: 11/27/2023] [Accepted: 04/19/2024] [Indexed: 05/29/2024] Open
Abstract
Purpose Approximately 30% of patients with diffuse large B cell lymphoma (DLBCL) will develop relapsed or treatment-refractory disease after primary chemotherapy. Patients unable to undergo aggressive chemotherapy and stem cell transplant or chimeric antigen receptor T-cell (CAR T-cell) therapy have limited treatment options. Here, we investigated the safety and efficacy of combining obinutuzumab with cytoreductive radiation to all areas of disease in patients with relapsed DLBCL. Methods and Materials A retrospective review of patients with treatment refractory DLBCL was performed. All patients were treated with external beam radiation to all sites of refractory disease with concurrent and adjuvant obinutuzumab. Toxicities were evaluated based on Common Terminology Criteria for Adverse Events v5.0 criteria. Kaplan-Meier analysis was used to calculate progression-free survival and overall survival. Results Between 2016 and 2022, 7 patients with refractory DLBCL were treated with concurrent radiation and obinutuzumab. No grade 3 or greater treatment-related toxicity was observed. Four of the 7 patients had a complete response at the radiated site on first postradiation imaging. The median progression-free survival and overall survival were 30 months. Conclusions In this small cohort of treatment-refractory patients with DLBCL, the combination of radiation and obinutuzumab was well tolerated without excessive treatment-related toxicity. The combination resulted in durable disease control with a prolonged overall survival without additional treatment in a subset of patients.
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Affiliation(s)
- Brett A. Morris
- Department of Human Oncology, Department of Internal Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Emily C. Merfeld
- Department of Human Oncology, Department of Internal Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Adam R. Burr
- Department of Human Oncology, Department of Internal Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Kristin A. Bradley
- Department of Human Oncology, Department of Internal Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Christopher D. Fletcher
- Division of Hematology and Oncology, Department of Internal Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
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3
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Kuruvilla D, Huynh T, Nester M, Chose C, Zervoudakis G, Letson GD, Joyce DM, Binitie OT, Figura NB, Costello JR, Freeman CL, Lazarides AL. Management of bone disease with concurrent chimeric antigen receptor T-cell therapy for multiple myeloma. Crit Rev Oncol Hematol 2024; 201:104429. [PMID: 38942219 DOI: 10.1016/j.critrevonc.2024.104429] [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: 04/27/2024] [Revised: 06/17/2024] [Accepted: 06/24/2024] [Indexed: 06/30/2024] Open
Abstract
In the intricate landscape of multiple myeloma, a hematologic malignancy of plasma cells, bone disease presents a pivotal and often debilitating complication. The emergence of Chimeric Antigen Receptor T-cell (CAR-T) therapy has marked a pivotal shift in the therapeutic landscape, offering novel avenues for the management of MM, particularly for those with relapsed or refractory disease. This innovative treatment modality not only targets malignant cells with precision but also influences the bone microenvironment, presenting both challenges and opportunities in patient care. In this comprehensive review, we aim to examine the multifaceted aspects of bone disease in patients with multiple myeloma and concurrent CAR-T therapy, highlighting its clinical ramifications and the latest advancements in diagnostic modalities and therapeutic interventions. The article aims to synthesize current understanding of the interplay between myeloma cells, CAR-T cells, and the bone microenvironment in the context of current treatment strategies in this challenging and unique patient population.
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Affiliation(s)
- Davis Kuruvilla
- University of South Florida, Morsani College of Medicine, Tampa, FL, United States.
| | - Thien Huynh
- University of South Florida, Morsani College of Medicine, Tampa, FL, United States.
| | - Matthew Nester
- University of South Florida, Morsani College of Medicine, Tampa, FL, United States.
| | - Chloe Chose
- University of South Florida, Morsani College of Medicine, Tampa, FL, United States.
| | | | - G Douglas Letson
- Department of Sarcoma, Moffitt Cancer Center, Tampa, FL, United States.
| | - David M Joyce
- Department of Sarcoma, Moffitt Cancer Center, Tampa, FL, United States.
| | - Odion T Binitie
- Department of Sarcoma, Moffitt Cancer Center, Tampa, FL, United States.
| | - Nicholas B Figura
- Department of Radiation Oncology, Moffitt Cancer Center, Tampa, FL, United States.
| | - James R Costello
- Department of Diagnostic Imaging and Intervention, Moffitt Cancer Center, Tampa, FL, United States.
| | - Ciara L Freeman
- Department of Blood and Marrow Transplant and Cellular Immunotherapy, Moffitt Cancer Center, Tampa, FL, United States.
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4
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Nakamura N, Jo T, Arai Y, Kitawaki T, Nishikori M, Mizumoto C, Kanda J, Yamashita K, Nagao M, Takaori-Kondo A. Utilizing red blood cell distribution width (RDW) as a reliable biomarker to predict treatment effects after chimeric antigen receptor T cell therapy. Clin Exp Med 2024; 24:105. [PMID: 38771501 PMCID: PMC11108946 DOI: 10.1007/s10238-024-01373-5] [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: 03/18/2024] [Accepted: 05/09/2024] [Indexed: 05/22/2024]
Abstract
Chimeric antigen receptor T cell (CAR-T) therapy is an effective treatment for B cell malignancies. A certain fraction of patients, however, experience post-CAR-T relapse, and due to the difficulty of precise relapse prediction, biomarkers that can predict the strength and duration of CAR-T efficacy are needed before CAR-T infusion. Therefore, we performed a single-center cohort study including 91 diffuse large B cell lymphoma (DLBCL) patients treated with CAR-T in order to identify such a new prognostic biomarker. After confirming that each of the already reported prognostic parameters (disease status at leukapheresis, primary refractoriness, number of treatment lines, CD3+ cell counts at leukapheresis) has only limited predictive performance, we established a new composite parameter by integrating these four variables, and found that it predicts progression-free survival (PFS) after CAR-T infusion with statistical significance. Moreover, after comprehensive correlation analyses of this new composite parameter with all individual laboratory variables, we determined that the standard deviation of red blood cell distribution width (RDW-SD) at leukapheresis shows significant correlation with the composite parameter and may be a prognostic biomarker (R2 = 0.76, p = 0.02). Validation analysis indicated that a higher RDW-SD is significantly associated with poorer PFS after CAR-T cell therapy (HR, 3.46, P = 0.03). Thus, this study suggests that a single parameter, RDW-SD at leukapheresis, is a novel, useful biomarker that can be obtained early to predict therapeutic effects of CAR-T cell therapy. Post-CAR-T maintenance or re-induction therapies should be adopted for higher risk patients, who may relapse after CAR-T therapy.
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Affiliation(s)
- Naokazu Nakamura
- Department of Hematology, Kyoto University Hospital, Kyoto, Japan
| | - Tomoyasu Jo
- Department of Hematology, Kyoto University Hospital, Kyoto, Japan
- Department of Clinical Laboratory Medicine, Kyoto University Hospital, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Yasuyuki Arai
- Department of Hematology, Kyoto University Hospital, Kyoto, Japan.
- Department of Clinical Laboratory Medicine, Kyoto University Hospital, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - Toshio Kitawaki
- Department of Hematology, Kyoto University Hospital, Kyoto, Japan
| | - Momoko Nishikori
- Department of Hematology, Kyoto University Hospital, Kyoto, Japan
- Department of Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Chisaki Mizumoto
- Department of Hematology, Kyoto University Hospital, Kyoto, Japan
| | - Junya Kanda
- Department of Hematology, Kyoto University Hospital, Kyoto, Japan
| | - Kouhei Yamashita
- Department of Hematology, Kyoto University Hospital, Kyoto, Japan
| | - Miki Nagao
- Department of Clinical Laboratory Medicine, Kyoto University Hospital, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
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5
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Szlasa W, Sztuder A, Kaczmar-Dybko A, Maciejczyk A, Dybko J. Efficient combination of radiotherapy and CAR-T - A systematic review. Biomed Pharmacother 2024; 174:116532. [PMID: 38574625 DOI: 10.1016/j.biopha.2024.116532] [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: 01/09/2024] [Revised: 03/28/2024] [Accepted: 03/29/2024] [Indexed: 04/06/2024] Open
Abstract
Chimeric antigen receptor T (CAR-T) cell therapy, a groundbreaking immunotherapy. However, it faces formidable challenges in treating solid tumors, grappling with issues like poor trafficking, limited penetration, and insufficient persistence within the tumor microenvironment (TME). CAR-T cells are engineered to express receptors that target specific cancer antigens, enhancing their ability to recognize and eliminate cancer cells. This review paper explores the intricate interplay between CAR-T therapy and radiotherapy (RT), investigating their synergistic potential. Radiotherapy, a standard cancer treatment, involves using high doses of radiation to target and damage cancer cells, disrupting their ability to grow and divide. We highlight that RT modulates the TME, augments antigen presentation, and promotes immune cell infiltration, bolstering CAR-T cell-mediated tumor eradication. Molecular insights shed light on RT-induced alterations in tumor stroma, T cell recruitment promotion, and induction of immunogenic cell death. Noteworthy, strategies, such as combining hypofractionated radiotherapy with myeloid-derived suppressor cell blockade, underscore innovative approaches to enhance CAR-T cell therapy in solid tumors. Bridging indications for RT and CAR-T cells in hematological malignancies are discussed, emphasizing scenarios where RT strategically enhances CAR-T cell efficacy. The paper critically evaluates the RT as a bridge compared to traditional chemotherapy, highlighting timing and dosage considerations crucial for optimizing CAR-T therapy outcomes. In summary, the paper provides valuable insights into the intricate molecular mechanisms activated by RT and innovative strategies to improve CAR-T cell therapy, fostering a deeper understanding of their combined potential in cancer treatment.
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Affiliation(s)
- Wojciech Szlasa
- Lower Silesian Centre of Oncology, Pulmonology and Hematology, Wroclaw 53-413, Poland; Medical University Hospital, Borowska 213, Wrocław 50-556, Poland.
| | - Aleksandra Sztuder
- Lower Silesian Centre of Oncology, Pulmonology and Hematology, Wroclaw 53-413, Poland; Department of Oncology, Wroclaw Medical University, Wroclaw 50-367, Poland
| | | | - Adam Maciejczyk
- Lower Silesian Centre of Oncology, Pulmonology and Hematology, Wroclaw 53-413, Poland; Department of Oncology, Wroclaw Medical University, Wroclaw 50-367, Poland
| | - Jarosław Dybko
- Lower Silesian Centre of Oncology, Pulmonology and Hematology, Wroclaw 53-413, Poland; Department of Oncology and Hematology, Wroclaw University of Science and Technology, Wrocław 50-370, Poland
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6
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Richter J. Like a bridge over troubled water: keeping the myeloma down en route to CAR-T. Blood Cancer J 2024; 14:64. [PMID: 38609377 PMCID: PMC11015014 DOI: 10.1038/s41408-024-01049-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/20/2024] [Accepted: 04/03/2024] [Indexed: 04/14/2024] Open
Affiliation(s)
- Joshua Richter
- Tisch Cancer Institute: Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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7
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Kuhnl A, Roddie C, Kirkwood AA, Chaganti S, Norman J, Lugthart S, Osborne W, Gibb A, Gonzalez Arias C, Latif A, Uttenthal B, Seymour F, Jones C, Springell D, Brady JL, Illidge T, Stevens A, Alexander E, Hawley L, O'Rourke N, Bedi C, Prestwich R, Frew J, Burns D, O'Reilly M, Sanderson R, Sivabalasingham S, Mikhaeel NG. Outcome and feasibility of radiotherapy bridging in large B-cell lymphoma patients receiving CD19 CAR T in the UK. Br J Haematol 2024. [PMID: 38594876 DOI: 10.1111/bjh.19453] [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: 02/06/2024] [Revised: 03/07/2024] [Accepted: 03/27/2024] [Indexed: 04/11/2024]
Abstract
Radiotherapy (RT) has potential synergistic effects with chimeric antigen receptor (CAR) T but is not widely used as bridging therapy due to logistical challenges and lack of standardised protocols. We analysed RT bridging in a multicentre national cohort of large B-cell lymphoma patients approved for 3L axicabtagene ciloleucel or tisagenlecleucel across 12 UK centres. Of 763 approved patients, 722 were leukapheresed, 717 had data available on bridging therapy. 169/717 (24%) received RT bridging, 129 as single modality and 40 as combined modality treatment (CMT). Of 169 patients, 65.7% had advanced stage, 36.9% bulky disease, 86.5% elevated LDH, 41.7% international prognostic index (IPI) ≥3 and 15.2% double/triple hit at the time of approval. Use of RT bridging varied from 11% to 32% between centres and increased over time. Vein-to-vein time and infusion rate did not differ between bridging modalities. RT-bridged patients had favourable outcomes with 1-year progression-free survival (PFS) of 56% for single modality and 47% for CMT (1-year PFS 43% for systemic bridging). This is the largest cohort of LBCL patients receiving RT bridging prior to CAR T reported to date. Our results show that RT bridging can be safely and effectively used even in advanced stage and high-risk disease, with low dropout rates and excellent outcomes.
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Affiliation(s)
- A Kuhnl
- Department of Haematology, King's College Hospital, London, UK
| | - C Roddie
- University College London Hospitals, London, UK
- UCL Cancer Institute, University College London, London, UK
| | - A A Kirkwood
- Cancer Research UK & UCL Cancer Trials Centre, UCL Cancer Institute, UCL, London, UK
| | - S Chaganti
- Queen Elizabeth Hospital, Birmingham, UK
| | - J Norman
- Department of Haematology, Manchester Royal Infirmary, Manchester, UK
| | - S Lugthart
- University Hospitals Bristol and Weston, Bristol, UK
| | - W Osborne
- Freeman Hospital, Newcastle, UK
- Newcastle University, Newcastle, UK
| | - A Gibb
- Department of Medical Oncology, The Christie Hospital, Manchester, UK
| | | | - A Latif
- Queen Elizabeth University Hospital, Glasgow, UK
| | - B Uttenthal
- Department of Haematology, Addenbrooke's Hospital, Cambridge, UK
| | | | - C Jones
- Department of Haematology, University Hospital of Wales, Cardiff, UK
| | - D Springell
- University College London Hospitals, London, UK
| | - J L Brady
- Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - T Illidge
- Cancer Sciences, University of Manchester Christie NHS Trust, Manchester NIHR BRC, Manchester, UK
| | - A Stevens
- Queen Elizabeth Hospital, Birmingham, UK
| | | | - L Hawley
- University Hospitals Bristol and Weston, Bristol, UK
| | - N O'Rourke
- Queen Elizabeth University Hospital, Glasgow, UK
| | - C Bedi
- Western General Hospital, Edinburgh, UK
| | | | - J Frew
- Freeman Hospital, Newcastle, UK
| | - D Burns
- Queen Elizabeth Hospital, Birmingham, UK
| | - M O'Reilly
- University College London Hospitals, London, UK
| | - R Sanderson
- Department of Haematology, King's College Hospital, London, UK
| | | | - N G Mikhaeel
- Guy's and St Thomas' NHS Foundation Trust, London, UK
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8
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Parikh RR, Milgrom SA, Campbell BA. Pushing the CART to the Finish Line: Integrating Radiation Therapy Into Chimeric Antigen Receptor T-Cell Therapy Programs to Improve Outcomes for Patients With Relapsed/Refractory Diffuse Large B-Cell Lymphoma. Int J Radiat Oncol Biol Phys 2024; 118:1152-1158. [PMID: 38492961 DOI: 10.1016/j.ijrobp.2023.03.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 03/30/2023] [Indexed: 03/18/2024]
Affiliation(s)
- Rahul R Parikh
- Department of Radiation Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey.
| | - Sarah A Milgrom
- Department of Radiation Oncology, University of Colorado, Aurora, Colorado
| | - Belinda A Campbell
- Department of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria, Australia; Department of Clinical Pathology, University of Melbourne, Parkville, Victoria, Australia
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9
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Keijzer K, de Boer JW, van Doesum JA, Noordzij W, Huls GA, van Dijk LV, van Meerten T, Niezink AGH. Reducing and controlling metabolic active tumor volume prior to CAR T-cell infusion can improve survival outcomes in patients with large B-cell lymphoma. Blood Cancer J 2024; 14:41. [PMID: 38448432 PMCID: PMC10917787 DOI: 10.1038/s41408-024-01022-w] [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: 11/21/2023] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 03/08/2024] Open
Abstract
Bridging therapy before CD19-directed chimeric antigen receptor (CAR) T-cell infusion is frequently applied in patients with relapsed or refractory Large B-cell lymphoma (r/r LBCL). This study aimed to assess the influence of quantified MATV and MATV-dynamics, between pre-apheresis (baseline) and pre-lymphodepleting chemotherapy (pre-LD) MATV, on CAR T-cell outcomes and toxicities in patients with r/r LBCL. MATVs were calculated semi-automatically at baseline (n = 74) and pre-LD (n = 68) in patients with r/r LBCL who received axicabtagene ciloleucel. At baseline, patients with a low MATV (< 190 cc) had a better time to progression (TTP) and overall survival (OS) compared to high MATV patients (p < 0.001). High MATV patients who remained stable or reduced upon bridging therapy showed a significant improvement in TTP (p = 0.041) and OS (p = 0.015), compared to patients with a high pre-LD MATV (> 480 cc). Furthermore, high MATV baseline was associated with severe cytokine release syndrome (CRS, p = 0.001). In conclusion, patients with low baseline MATV had the best TTP/OS and effective reduction or controlling MATV during bridging improved survival outcomes in patients with a high baseline MATV, providing rationale for the use of more aggressive bridging regimens.
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Affiliation(s)
- Kylie Keijzer
- Department of Hematology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
- Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Janneke W de Boer
- Department of Hematology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Jaap A van Doesum
- Department of Hematology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Walter Noordzij
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Gerwin A Huls
- Department of Hematology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Lisanne V van Dijk
- Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Tom van Meerten
- Department of Hematology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Anne G H Niezink
- Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands.
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10
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Saifi O, Lester SC, Breen WG, Rule WG, Lin Y, Bennani NN, Rosenthal A, Munoz J, Murthy HS, Kharfan-Dabaja MA, Peterson JL, Hoppe BS. Incorporating radiation with anti-CD19 chimeric antigen receptor T-cell therapy for relapsed/refractory non-Hodgkin lymphoma: A multicenter consensus approach. Am J Hematol 2024; 99:124-134. [PMID: 37950857 DOI: 10.1002/ajh.27155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/13/2023]
Abstract
Anti-CD19 chimeric antigen receptor T-cell therapy (CART) has revolutionized the outcomes of relapsed and/or refractory B-cell non-Hodgkin lymphoma. However, CART is still limited by its availability, toxicity, and response durability. Not all patients make it to the CART infusion phase due to disease progression. Among those who receive CART, a significant number of patients experience life-threatening cytokine release syndrome toxicity, and less than half maintain a durable response with the majority relapsing in pre-existing sites of disease present pre-CART. Radiation therapy stands as a promising peri-CART and salvage treatment that can improve the outcomes of these patients. Evidence suggests that bridging radiotherapy prior to CART controls the disease during the manufacturing period, augments response rates and local control, cytoreduces/debulks the disease and decreases the severity of cytokine release syndrome, and may prolong disease-free intervals and survival especially in patients with bulky disease. Consolidative radiotherapy for residual post-CART disease alters the pattern of relapse and improves local recurrence-free and progression-free survivals. Salvage radiotherapy for relapsed post-CART disease has favorable survival outcomes when delivered comprehensively for patients with limited relapsed disease and palliates symptoms for patients with diffuse relapsed disease. The biology of the disease during the peri-CART period is poorly understood, and further studies investigating the optimal timing and dosing of radiation therapy (RT) are needed. In this review, we tackle the most significant challenges of CART, review and propose how RT can help mitigate these challenges, and provide The Mayo Clinic experts' approach on incorporating RT with CART.
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Affiliation(s)
- Omran Saifi
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, Florida, USA
| | - Scott C Lester
- Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota, USA
| | - William G Breen
- Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota, USA
| | - William G Rule
- Department of Radiation Oncology, Mayo Clinic, Phoenix, Arizona, USA
| | - Yi Lin
- Division of Hematology, Mayo Clinic, Rochester, Minnesota, USA
- Division of Experimental Pathology, Mayo Clinic, Rochester, Minnesota, USA
| | - N Nora Bennani
- Division of Hematology, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Javier Munoz
- Division of Hematology, Mayo Clinic, Phoenix, Arizona, USA
| | - Hemant S Murthy
- Division of Hematology, Mayo Clinic, Jacksonville, Florida, USA
| | | | | | - Bradford S Hoppe
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, Florida, USA
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11
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Dreger P, Corradini P, Gribben JG, Glass B, Jerkeman M, Kersten MJ, Morschhauser F, Mussetti A, Viardot A, Zinzani PL, Sureda A. CD19-directed CAR T cells as first salvage therapy for large B-cell lymphoma: towards a rational approach. Lancet Haematol 2023; 10:e1006-e1015. [PMID: 38030311 DOI: 10.1016/s2352-3026(23)00307-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 09/09/2023] [Accepted: 10/06/2023] [Indexed: 12/01/2023]
Abstract
The approval of CD19-directed chimeric antigen receptor (CAR) T-cell therapies for the second-line treatment of high-risk large B-cell lymphoma (LBCL) has greatly affected salvage algorithms for this condition, and such therapies could have the potential to improve the course of relapsed or refractory LBCL. In this Review, we provide guidance for a rational management approach to the use of commercial CD19-directed CAR T cells in the second-line treatment of LBCL, addressing crucial questions regarding eligible histologies; age, comorbidity, and tumour biology restrictions; the handling of very aggressive tumour behaviour; and holding and bridging therapies. The guidance was developed in a structured manner and, for each question, consists of a description of the clinical issue, a summary of the evidence, the rationale for a practical management approach, and recommendations. These recommendations could help to decide on the optimal management of patients with relapsed or refractory LBCL who are considered for second-line CAR T-cell treatment.
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Affiliation(s)
- Peter Dreger
- Department of Medicine V, University of Heidelberg, Heidelberg, Germany.
| | - Paolo Corradini
- Division of Hematology, IRCCS Istituto Nazionale dei Tumori Milano, University of Milano, Milan, Italy
| | - John G Gribben
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, UK
| | - Bertram Glass
- Department of Hematology and Cell Therapy, Helios Klinikum Berlin-Buch, Berlin, Germany
| | - Mats Jerkeman
- Department of Oncology, Skane University Hospital, Lund, Sweden
| | - Marie Jose Kersten
- Department of Hematology, Amsterdam UMC, location AMC, Cancer Center Amsterdam and LYMMCARE, Amsterdam, Netherlands
| | - Franck Morschhauser
- Hematology Department, CHU Lille, Université de Lille, ULR 7365, Groupe de Recherche sur les formes Injectables et les Technologies Associées, Lille, France
| | - Alberto Mussetti
- Hematology Department, Institut Català d'Oncologia - Hospitalet, Institut d'Investigació Biomèdique de Bellvitge, Universitat de Barcelona, Barcelona, Spain
| | - Andreas Viardot
- Department of Internal Medicine III, Ulm University Hospital, Ulm, Germany
| | - Pier Luigi Zinzani
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Istituto di Ematologia "Seràgnoli", Bologna, Italy; Dipartimento di Scienze Mediche e Chirurgiche, Università di Bologna, Bologna, Italy
| | - Anna Sureda
- Hematology Department, Institut Català d'Oncologia - Hospitalet, Institut d'Investigació Biomèdique de Bellvitge, Universitat de Barcelona, Barcelona, Spain
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12
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Freret ME, Tringale KR, Boe L, Imber BS, Joffe E, Yahalom J, Hajj C. Very low-dose radiotherapy for extranodal marginal zone lymphoma of bronchus-associated lymphoid tissue. Leuk Lymphoma 2023; 64:2195-2201. [PMID: 37706509 PMCID: PMC10962616 DOI: 10.1080/10428194.2023.2255706] [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: 07/21/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/15/2023]
Abstract
Extranodal marginal zone lymphoma of bronchus-associated lymphoid tissue (BALT) is a rare cancer for which optimal treatment strategies are undefined. Retrospective analyses suggest excellent outcomes with surgical resection for localized BALT lymphoma; however, the role of radiotherapy remains underexplored. We report the largest-to-date single-center analysis of 13 primary BALT lymphoma patients treated with radiotherapy. Of 15 treated lesions, we report a 100% response rate with complete response (CR) achieved in 67% of lesions. Among 10 lesions treated with very low-dose radiotherapy (VLDRT; 4 Gray [Gy]), 6 (60%) achieved a CR; among 5 lesions treated with full-dose radiotherapy (24-36 Gy), 4 (80%) achieved a CR. There were no local recurrences. Only one patient, treated with 30 Gy, developed an acute grade 3/4 toxic effect. There were no events of radiation-induced secondary malignancies. Our institutional experience indicates that radiotherapy, including VLDRT, is a safe and effective treatment for primary BALT lymphoma.
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Affiliation(s)
- Morgan E. Freret
- Radiation Oncology, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY, USA
| | - Kathryn R. Tringale
- Radiation Oncology, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY, USA
| | - Lillian Boe
- Epidemiology and Biostatistics, MSKCC, New York, NY, USA
| | - Brandon S. Imber
- Radiation Oncology, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY, USA
| | - Erel Joffe
- Lymphoma Service, MSKCC, New York, NY, USA
| | - Joachim Yahalom
- Radiation Oncology, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY, USA
| | - Carla Hajj
- Radiation Oncology, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY, USA
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13
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Karsten H, Matrisch L, Cichutek S, Fiedler W, Alsdorf W, Block A. Broadening the horizon: potential applications of CAR-T cells beyond current indications. Front Immunol 2023; 14:1285406. [PMID: 38090582 PMCID: PMC10711079 DOI: 10.3389/fimmu.2023.1285406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 11/10/2023] [Indexed: 12/18/2023] Open
Abstract
Engineering immune cells to treat hematological malignancies has been a major focus of research since the first resounding successes of CAR-T-cell therapies in B-ALL. Several diseases can now be treated in highly therapy-refractory or relapsed conditions. Currently, a number of CD19- or BCMA-specific CAR-T-cell therapies are approved for acute lymphoblastic leukemia (ALL), diffuse large B-cell lymphoma (DLBCL), mantle cell lymphoma (MCL), multiple myeloma (MM), and follicular lymphoma (FL). The implementation of these therapies has significantly improved patient outcome and survival even in cases with previously very poor prognosis. In this comprehensive review, we present the current state of research, recent innovations, and the applications of CAR-T-cell therapy in a selected group of hematologic malignancies. We focus on B- and T-cell malignancies, including the entities of cutaneous and peripheral T-cell lymphoma (T-ALL, PTCL, CTCL), acute myeloid leukemia (AML), chronic myeloid leukemia (CML), chronic lymphocytic leukemia (CLL), classical Hodgkin-Lymphoma (HL), Burkitt-Lymphoma (BL), hairy cell leukemia (HCL), and Waldenström's macroglobulinemia (WM). While these diseases are highly heterogenous, we highlight several similarly used approaches (combination with established therapeutics, target depletion on healthy cells), targets used in multiple diseases (CD30, CD38, TRBC1/2), and unique features that require individualized approaches. Furthermore, we focus on current limitations of CAR-T-cell therapy in individual diseases and entities such as immunocompromising tumor microenvironment (TME), risk of on-target-off-tumor effects, and differences in the occurrence of adverse events. Finally, we present an outlook into novel innovations in CAR-T-cell engineering like the use of artificial intelligence and the future role of CAR-T cells in therapy regimens in everyday clinical practice.
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Affiliation(s)
- Hendrik Karsten
- Faculty of Medicine, University of Hamburg, Hamburg, Germany
| | - Ludwig Matrisch
- Department of Rheumatology and Clinical Immunology, University Medical Center Schleswig-Holstein, Lübeck, Germany
- Faculty of Medicine, University of Lübeck, Lübeck, Germany
| | - Sophia Cichutek
- Department of Oncology, Hematology and Bone Marrow Transplantation with Division of Pneumology, University Medical Center Eppendorf, Hamburg, Germany
| | - Walter Fiedler
- Department of Oncology, Hematology and Bone Marrow Transplantation with Division of Pneumology, University Medical Center Eppendorf, Hamburg, Germany
| | - Winfried Alsdorf
- Department of Oncology, Hematology and Bone Marrow Transplantation with Division of Pneumology, University Medical Center Eppendorf, Hamburg, Germany
| | - Andreas Block
- Department of Oncology, Hematology and Bone Marrow Transplantation with Division of Pneumology, University Medical Center Eppendorf, Hamburg, Germany
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14
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Testa U, Leone G, Pelosi E, Castelli G, Hohaus S. CAR-T Cell Therapy in Large B Cell Lymphoma. Mediterr J Hematol Infect Dis 2023; 15:e2023066. [PMID: 38028399 PMCID: PMC10631715 DOI: 10.4084/mjhid.2023.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023] Open
Abstract
Large B-cell lymphomas (LBCLs) are among the most frequent (about 30%) non-Hodgkin's lymphoma. Despite the aggressive behavior of these lymphomas, more than 60% of patients can be cured with first-line chemoimmunotherapy using the R-CHOP regimen. Patients with refractory or relapsing disease show a poor outcome even when treated with second-line therapies. CD19-targeted chimeric antigen receptor (CAR) T-cells are emerging as an efficacious second-line treatment strategy for patients with LBCL. Three CD19-CAR-T-cell products received FDA and EMA approval. CAR-T cell therapy has also been explored for treating high-risk LBCL patients in the first-line setting and for patients with central nervous system involvement. Although CD19-CAR-T therapy has transformed the care of refractory/relapsed LBCL, about 60% of these patients will ultimately progress or relapse following CD19-CAR-T; therefore, it is fundamental to identify predictive criteria of response to CAR-T therapy and to develop salvage therapies for patients relapsing after CD19-CAR-T therapies. Moreover, ongoing clinical trials evaluate bispecific CAR-T cells targeting both CD19 and CD20 or CD19 and CD22 as a tool to improve the therapeutic efficacy and reduce the number of refractory/relapsing patients.
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Affiliation(s)
| | - Giuseppe Leone
- Dipartimento Di Scienze Radiologiche Ed Ematologiche, Università Cattolica Del Sacro Cuore, Roma, Italy
| | | | | | - Stefan Hohaus
- Dipartimento Di Diagnostica per Immagini, Radioterapia Oncologica Ed Ematologia, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Roma, Italy. Sezione Di Ematologia
- Dipartimento Di Scienze Radiologiche Ed Ematologiche, Università Cattolica Del Sacro Cuore, Roma, Italy
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15
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Kim AB, Chou SY, Kang S, Kwon E, Inkman M, Szymanski J, Andruska N, Colgan C, Zhang J, Yang JC, Singh N, DeSelm CJ. Intrinsic tumor resistance to CAR T cells is a dynamic transcriptional state that is exploitable with low-dose radiation. Blood Adv 2023; 7:5396-5408. [PMID: 37093643 PMCID: PMC10509663 DOI: 10.1182/bloodadvances.2022009543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 04/10/2023] [Accepted: 04/10/2023] [Indexed: 04/25/2023] Open
Abstract
Chimeric antigen receptor (CAR) T-cell therapy represents a major advancement for hematologic malignancies, with some patients achieving long-term remission. However, the majority of treated patients still die of their disease. A consistent predictor of response is tumor quantity, wherein a higher disease burden before CAR T-cell therapy portends a worse prognosis. Focal radiation to bulky sites of the disease can decrease tumor quantity before CAR T-cell therapy, but whether this strategy improves survival is unknown. We find that substantially reducing systemic tumor quantity using high-dose radiation to areas of bulky disease, which is commonly done clinically, is less impactful on overall survival in mice achieved by CAR T cells than targeting all sites of disease with low-dose total tumor irradiation (TTI) before CAR T-cell therapy. This finding highlights another predictor of response, tumor quality, the intrinsic resistance of an individual patient's tumor cells to CAR T-cell killing. Little is known about whether or how an individual tumor's intrinsic resistance may change under different circumstances. We find a transcriptional "death receptor score" that reflects a tumor's intrinsic sensitivity to CAR T cells can be temporarily increased by low-dose TTI, and the timing of this transcriptional change correlates with improved in vivo leukemia control by an otherwise limited number of CAR T cells. This suggests an actionable method for potentially improving outcomes in patients predicted to respond poorly to this promising therapy and highlights that intrinsic tumor attributes may be equally or more important predictors of CAR T-cell response as tumor burden.
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Affiliation(s)
- Alexander B. Kim
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
| | - Ssu-Yu Chou
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
| | - Solomon Kang
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
| | - Eric Kwon
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
| | - Matthew Inkman
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
| | - Jeff Szymanski
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
| | - Neal Andruska
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
| | - Cian Colgan
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
| | - Jin Zhang
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
| | - Joanna C. Yang
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
| | - Nathan Singh
- Department of Medicine, Washington University School of Medicine, St. Louis, MO
| | - Carl J. DeSelm
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, MO
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16
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Martino M, Canale FA, Porto G, Verduci C, Utano G, Policastro G, Germanò J, Alati C, Santoro L, Imbalzano L, Pitea M. Integrating CAR-T cell therapy into the management of DLBCL: what we are learning. Expert Opin Biol Ther 2023; 23:1277-1285. [PMID: 38078446 DOI: 10.1080/14712598.2023.2292634] [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: 08/23/2023] [Accepted: 12/05/2023] [Indexed: 12/29/2023]
Abstract
INTRODUCTION Chimeric Antigen Receptor ;(CAR) T cells therapies have become part of the standard of care for patients with relapsed/refractory (R/R) diffuse large B-cell lymphoma (DLBCL). The weakness of CAR-T therapies is that there are no comparative clinical trials, although many publications based on real-life data have confirmed the results obtained in pivotal studies. After several years of the commercialization of CAR-T, some points still need to be fully clarified. Healthcare professionals have questions about identifying patients who may benefit from therapy. There are aspects inherent in the accessibility of care related to improved relationships between CAR-T-delivering and referral centers. AREAS COVERED Open questions are inherent in the salvage and bridge therapy, predictive criteria for response and persistence of CAR-T after infusion. Managing toxicities remain a top priority and one of the points on which further knowledge is needed. EXPERT OPINION This review aims to describe the current landscape of CAR-T cells in DLBCL, outline their outcomes and toxicities, and explain the outstanding questions that remain to be addressed.
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Affiliation(s)
- Massimo Martino
- Stem Cell Transplantation and Cellular Therapies Unit (CTMO), Department of Hemato-Oncology and Radiotherapy Grande OspedaleMetropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
| | - Filippo Antonio Canale
- Stem Cell Transplantation and Cellular Therapies Unit (CTMO), Department of Hemato-Oncology and Radiotherapy Grande OspedaleMetropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
| | - Gaetana Porto
- Stem Cell Transplantation and Cellular Therapies Unit (CTMO), Department of Hemato-Oncology and Radiotherapy Grande OspedaleMetropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
| | - Chiara Verduci
- Stem Cell Transplantation and Cellular Therapies Unit (CTMO), Department of Hemato-Oncology and Radiotherapy Grande OspedaleMetropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
| | - Giovanna Utano
- Stem Cell Transplantation and Cellular Therapies Unit (CTMO), Department of Hemato-Oncology and Radiotherapy Grande OspedaleMetropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
| | - Giorgia Policastro
- Stem Cell Transplantation and Cellular Therapies Unit (CTMO), Department of Hemato-Oncology and Radiotherapy Grande OspedaleMetropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
| | - Jessyca Germanò
- Hematology Unit, Department of Hemato-Oncology and Radiotherapy Grande Ospedale Metropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
| | - Caterina Alati
- Hematology Unit, Department of Hemato-Oncology and Radiotherapy Grande Ospedale Metropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
| | - Ludovica Santoro
- Stem Cell Transplantation and Cellular Therapies Unit (CTMO), Department of Hemato-Oncology and Radiotherapy Grande OspedaleMetropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
| | - Lucrezia Imbalzano
- Stem Cell Transplantation and Cellular Therapies Unit (CTMO), Department of Hemato-Oncology and Radiotherapy Grande OspedaleMetropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
| | - Martina Pitea
- Stem Cell Transplantation and Cellular Therapies Unit (CTMO), Department of Hemato-Oncology and Radiotherapy Grande OspedaleMetropolitano "Bianchi-Melacrino-Morelli", Reggio, Calabria, Italy
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17
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Specht L. Reappraisal of the role of radiation therapy in lymphoma treatment. Hematol Oncol 2023; 41 Suppl 1:75-81. [PMID: 37294967 DOI: 10.1002/hon.3151] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 03/28/2023] [Indexed: 06/11/2023]
Abstract
Radiation therapy (RT) for lymphomas has improved dramatically with modern imaging and treatment techniques, encompassing only the necessary volume with minimal doses to normal structures. Prescribed radiation doses are reduced, and fractionation schedules are under revision. With effective systemic treatment only initial macroscopic disease is irradiated. With no or less effective systemic treatment, possible microscopic disease is also included. Risks of long-term side effects of RT have diminished dramatically and should be weighed against risks from more systemic treatment or increased risk of relapse. Lymphoma patients are often elderly, they tolerate modern limited RT very well. Lymphomas refractory to systemic treatments often remain radioresponsive, and brief, mild RT may offer effective palliation. New roles for RT are emerging with immune therapies. RT for "bridging," keeping the lymphoma under control while waiting for immune therapy, is well established. Enhancement of the immune response to lymphomas, so-called "priming," is being intensively researched.
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Affiliation(s)
- Lena Specht
- Department of Oncology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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