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Wu C, Chen S, Wu Z, Xue J, Zhang W, Wang S, Xindong Zhao, Wu S. Chidamide and orelabrutinib synergistically induce cell cycle arrest and apoptosis in diffuse large B-cell lymphoma by regulating the PI3K/AKT/mTOR pathway. J Cancer Res Clin Oncol 2024; 150:98. [PMID: 38381215 PMCID: PMC10881688 DOI: 10.1007/s00432-024-05615-7] [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: 11/05/2023] [Accepted: 01/08/2024] [Indexed: 02/22/2024]
Abstract
OBJECTIVE The initial therapeutic approach for diffuse large B-cell lymphoma (DLBCL) entails a rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) regimen. However, 40% of patients exhibit suboptimal responses, with some experiencing relapse and refractory conditions. This study aimed to explore novel therapeutic strategies and elucidate their underlying mechanisms in DLBCL. METHODS Bioinformatics techniques were employed to scrutinize correlations between the HDAC1, HDAC2, HDAC3, HDAC10, BTK, MYC, TP53, and BCL2 genes in DLBCL. In vitro experiments were conducted using DB and SU-DHL-4 cells treated with chidamide, orelabrutinib, and a combination of both. Cell viability was assessed by cell counting kit-8. Cell apoptosis and the cell cycle were determined using flow cytometry. Reactive oxygen species (ROS) production and mitochondrial function were assessed through ROS and JC-1 staining. RNA sequencing and western blot analyses were conducted to elucidate the molecular mechanisms underlying the combined action of chidamide and orelabrutinib in DLBCL cells. RESULTS This investigation revealed markedly enhanced antiproliferative effects when chidamide was combined with orelabrutinib. Compusyn software analysis indicated a synergistic effect of chidamide and orelabrutinib in inhibiting DLBCL cell proliferation, with a combination index (CI) < 1. This synergy further manifested as augmented cell cycle arrest, apoptosis induction, the downregulation of cell cycle-associated and antiapoptotic proteins, and the upregulation of proapoptotic proteins. Furthermore, the western blot and RNA-Seq findings suggested that combining chidamide and orelabrutinib modulated the PI3K/AKT/mTOR signaling pathway, thereby promoting DLBCL cell cycle arrest and apoptosis. CONCLUSION The findings of this study provide a compelling justification for the clinical utilization of chidamide and orelabrutinib to treat relapsed/refractory DLBCL.
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Affiliation(s)
- Chunyan Wu
- Department of Hematology, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, 266003, Shandong, China
| | - Shilv Chen
- Department of Hematology, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, 266003, Shandong, China
| | - Zhimin Wu
- Department of Hematology, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, 266003, Shandong, China
| | - Jiao Xue
- Department of Hematology, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, 266003, Shandong, China
| | - Wen Zhang
- Department of Hematology, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, 266003, Shandong, China
| | - Shan Wang
- Department of Hematology, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, 266003, Shandong, China
| | - Xindong Zhao
- Department of Medicine, Qingdao University, Qingdao, China
| | - Shaoling Wu
- Department of Hematology, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, 266003, Shandong, China.
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2
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Zhang J, Cai D, Gao R, Miao Y, Cui Y, Liu Z, Zhang H, Yan X, Su N. Case Report: CD19 CAR T-cell therapy following autologous stem cell transplantation: a successful treatment for R/R CD20-negative transformed follicular lymphoma with TP53 mutation. Front Immunol 2023; 14:1307242. [PMID: 38143763 PMCID: PMC10739420 DOI: 10.3389/fimmu.2023.1307242] [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: 10/04/2023] [Accepted: 11/21/2023] [Indexed: 12/26/2023] Open
Abstract
Background Follicular lymphoma (FL), a common indolent B-cell lymphoma, has the potential to transform into an aggressive lymphoma, such as diffuse large B-cell lymphoma (DLBCL). The outcome of patients with transformed follicular lymphoma (tFL) is poor, especially in patients with transformed lymphoma after chemotherapy and patients with progression within 24 months (POD24). Chimeric antigen receptor (CAR) T-cell therapy combined with autologous stem cell transplantation (ASCT) has promising antitumor efficacy. Case presentation Here, we described a 39-year-old male patient who was initially diagnosed with FL that transformed into DLBCL with POD24, CD20 negativity, TP53 mutation, and a bulky mass after 3 lines of therapy, all of which were adverse prognostic factors. We applied a combination approach: CD19 CAR T-cell infusion following ASCT. Ibrutinib was administered continuously to enhance efficacy, DHAP was administered as a salvage chemotherapy, and ICE was administered as a bridging regimen. The patient underwent BEAM conditioning on days -7~ -1, a total of 3.8 × 106/kg CD34+ stem cells were infused on days 01~02, and a total of 108 CAR T cells (relmacabtagene autoleucel, relma-cel, JWCAR029) were infused on day 03. The patient experienced grade 2 cytokine release syndrome (CRS), manifesting as fever and hypotension according to institutional standards. There was no immune effector cell-associated neurotoxicity syndrome (ICANS) after CAR T-cell infusion. Finally, the patient achieved CMR at +1 month, which has been maintained without any other adverse effects. Conclusion This case highlights the amazing efficacy of CD19 CAR T-cell therapy following ASCT for R/R tFL, thus providing new insight on therapeutic strategies for the future.
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MESH Headings
- Adult
- Humans
- Male
- Hematopoietic Stem Cell Transplantation
- Immunotherapy, Adoptive/adverse effects
- Lymphoma, Follicular/genetics
- Lymphoma, Follicular/therapy
- Lymphoma, Large B-Cell, Diffuse/genetics
- Lymphoma, Large B-Cell, Diffuse/therapy
- Lymphoma, Non-Hodgkin/etiology
- Neoplasm Recurrence, Local/therapy
- Transplantation, Autologous
- Tumor Suppressor Protein p53
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Affiliation(s)
- Jinjing Zhang
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Dali Cai
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Ran Gao
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yuan Miao
- Department of Pathology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yan Cui
- Department of Nuclear Medicine, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Zhenghua Liu
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Heyang Zhang
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Xiaojing Yan
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Nan Su
- Department of Hematology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
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3
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Bartlett NL, Assouline S, Giri P, Schuster SJ, Cheah CY, Matasar M, Gregory GP, Yoon DH, Shadman M, Fay K, Yoon SS, Panizo C, Flinn I, Johnston A, Bosch F, Sehn LH, Wei MC, Yin S, To I, Li CC, Huang H, Kwan A, Penuel E, Budde LE. Mosunetuzumab monotherapy is active and tolerable in patients with relapsed/refractory diffuse large B-cell lymphoma. Blood Adv 2023; 7:4926-4935. [PMID: 37067952 PMCID: PMC10463194 DOI: 10.1182/bloodadvances.2022009260] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 04/18/2023] Open
Abstract
As part of a phase 1 or 2 study, this single-arm expansion cohort established the efficacy and safety of mosunetuzumab monotherapy in patients with relapsed/refractory (R/R) diffuse large B-cell lymphoma (DLBCL) (received ≥2 previous lines of therapy). Intravenous mosunetuzumab was administered with cycle (C) 1 step-up dosing for cytokine release syndrome (CRS) mitigation: C1 day (D) 1: 1 mg; C1D8 2 mg; C1D15 and C2D1: 60 mg; C3 + D1: 30 mg. Hospitalization was not mandatory. Patients with complete response (CR) completed treatment after C8; those with partial response or stable disease continued treatment for a total of 17 cycles. The primary end point was CR rate (best response), assessed against a historical control CR rate (20%) by independent review facility. Eighty-eight patients (73.9% de novo DLBCL; 26.1% transformed follicular lymphoma) were enrolled; all had received previous anthracycline and anti-CD20 therapy. Overall response and CR rates were 42.0% (95% confidence interval [CI], 31.6-53.1) and 23.9% (95% CI, 15.4-34.1), respectively; CR rate did not reach statistical significance vs the historical control (P = .36). Median time to first response was 1.4 months. Median progression-free survival was 3.2 months (95% CI, 2.2-5.3). The CR rate in 26 patients who received previous chimeric antigen receptor T-cell (CAR-T) therapy was 12%. CRS was one of the most common adverse events (26.1% of patients); predominantly grade 1 to 2 and primarily in C1. Four patients (4.5%) discontinued mosunetuzumab owing to adverse events. Mosunetuzumab demonstrated notable efficacy and a manageable safety profile in patients with R/R DLBCL, including those previously treated with CAR-Ts. This trial was registered at www.clinicaltrials.gov as #NCT02500407.
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Affiliation(s)
- Nancy L. Bartlett
- Division of Oncology, Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO
| | - Sarit Assouline
- Division of Haematology, Jewish General Hospital, Montreal, QC, Canada
| | - Pratyush Giri
- Department of Haematology, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Stephen J. Schuster
- Lymphoma Program, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA
| | - Chan Y. Cheah
- Department of Hematology, Linear Clinical Research, University of Western Australia and Sir Charles Gairdner Hospital, Perth, WA, Australia
| | - Matthew Matasar
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Gareth P. Gregory
- Department of Hematology, Monash Health and School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC, Australia
| | - Dok Hyun Yoon
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Mazyar Shadman
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Keith Fay
- Department of Haematology, St. Vincent’s Hospital and Royal North Shore Hospital, Sydney, NSW, Australia
| | - Sung-Soo Yoon
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Carlos Panizo
- Department of Hematology, Clínica Universidad de Navarra, Pamplona, Spain
| | - Ian Flinn
- Lymphoma Research, Sarah Cannon Research Institute/Tennessee Oncology, Nashville, TN
| | - Anna Johnston
- Department of Haematology, University of Tasmania and Royal Hobart Hospital, Hobart, TAS, Australia
| | - Francesc Bosch
- Department of Hematology, University Hospital Vall d’Hebron, Barcelona, Spain
| | - Laurie H. Sehn
- Department of Medical Oncology, BC Cancer Centre for Lymphoid Cancer, Vancouver, BC, Canada
- Department of Medicine, The University of British Columbia, Vancouver, BC, Canada
| | | | - Shen Yin
- Genentech, Inc, South San Francisco, CA
| | - Iris To
- Genentech, Inc, South San Francisco, CA
| | | | - Huang Huang
- Hoffmann-La Roche Ltd, Mississauga, ON, Canada
| | | | | | - Lihua E. Budde
- Deaprtment of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA
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4
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CD20 expression, TrkB activation and functional activity of diffuse large B cell lymphoma-derived small extracellular vesicles. Br J Cancer 2021; 125:1687-1698. [PMID: 34743199 DOI: 10.1038/s41416-021-01611-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/19/2021] [Accepted: 10/21/2021] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Small extracellular vesicles (sEVs) including exosomes, carrying the CD20, could be involved in immunotherapy resistance in diffuse large B cell lymphoma (DLBCL). We have reported endogenous brain-derived neurotrophic factor/TrkB (tropomyosin-related kinase B) survival axis in DLBCL. Here, we performed a comparative study of sEV production by germinal centre B cell (GCB) and activated B cell (ABC)-DLBCL cell lines, and analysed TrkB activation on this process. METHODS GCB (SUDHL4 and SUDHL6) and ABC (OCI-LY3, OCI-LY10 and U2932) cell lines were used. sEVs were characterised using nanoparticle tracking analysis technology and western blot. CD20 content was also analysed by enzyme-linked immunoassay, and complement-dependent cytotoxicity of rituximab was investigated. 7,8-Dihydroxyflavone (7,8-DHF) was used as a TrkB agonist. In vivo role of sEVs was evaluated in a xenograft model. RESULTS sEVs production varied significantly between DLBCL cells, independently of subtype. CD20 level was consistent with that of parental cells. Higher CD20 expression was found in sEVs after TrkB activation, with a trend in increasing their concentration. sEVs determined in vitro and in vivo protection from rituximab, which seemed CD20 level-dependent; the protection was enhanced when sEVs were produced by 7,8-DHF-treated cells. CONCLUSIONS DLBCL-derived sEVs have the differential capacity to interfere with immunotherapy, which could be enhanced by growth factors like neurotrophins. Evaluating the sEV CD20 level could be useful for disease monitoring.
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5
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Papageorgiou SG, Thomopoulos TP, Katagas I, Bouchla A, Pappa V. Prognostic molecular biomarkers in diffuse large B-cell lymphoma in the rituximab era and their therapeutic implications. Ther Adv Hematol 2021; 12:20406207211013987. [PMID: 34104369 PMCID: PMC8150462 DOI: 10.1177/20406207211013987] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Accepted: 04/12/2021] [Indexed: 12/17/2022] Open
Abstract
Diffuse large B-cell lymphoma (DLBCL) represents a group of tumors characterized by substantial heterogeneity in terms of their pathological and biological features, a causal factor of their varied clinical outcome. This variation has persisted despite the implementation of rituximab in treatment regimens over the last 20 years. In this context, prognostic biomarkers are of great importance in order to identify high-risk patients that might benefit from treatment intensification or the introduction of novel therapeutic agents. Herein, we review current knowledge on specific immunohistochemical or genetic biomarkers that might be useful in clinical practice. Gene-expression profiling is a tool of special consideration in this effort, as it has enriched our understanding of DLBCL biology and has allowed for the classification of DLBCL by cell-of-origin as well as by more elaborate molecular signatures based on distinct gene-expression profiles. These subgroups might outperform individual biomarkers in terms of prognostication; however, their use in clinical practice is still limited. Moreover, the underappreciated role of the tumor microenvironment in DLBCL prognosis is discussed in terms of prognostic gene-expression signatures, as well as in terms of individual biomarkers of prognostic significance. Finally, the efficacy of novel therapeutic agents for the treatment of DLBCL patients are discussed and an evidence-based therapeutic approach by specific genetic subgroup is suggested.
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Affiliation(s)
- Sotirios G. Papageorgiou
- Second Department of Internal Medicine and Research Unit, University General Hospital ‘Attikon’, 1 Rimini Street, Haidari, Athens 12462, Greece
| | - Thomas P. Thomopoulos
- Second Department of Internal Medicine and Research Unit, Hematology Unit, University General Hospital, ‘Attikon’, Haidari, Athens, Greece
| | - Ioannis Katagas
- Second Department of Internal Medicine and Research Unit, Hematology Unit, University General Hospital, ‘Attikon’, Haidari, Athens, Greece
| | - Anthi Bouchla
- Second Department of Internal Medicine and Research Unit, Hematology Unit, University General Hospital, ‘Attikon’, Haidari, Athens, Greece
| | - Vassiliki Pappa
- Second Department of Internal Medicine and Research Unit, Hematology Unit, University General Hospital, ‘Attikon’, Haidari, Athens, Greece
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6
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Tembhare PR, Sriram H, Khanka T, Chatterjee G, Panda D, Ghogale S, Badrinath Y, Deshpande N, Patkar NV, Narula G, Bagal B, Jain H, Sengar M, Khattry N, Banavali S, Gujral S, Subramanian PG. Flow cytometric evaluation of CD38 expression levels in the newly diagnosed T-cell acute lymphoblastic leukemia and the effect of chemotherapy on its expression in measurable residual disease, refractory disease and relapsed disease: an implication for anti-CD38 immunotherapy. J Immunother Cancer 2021; 8:jitc-2020-000630. [PMID: 32439800 PMCID: PMC7247386 DOI: 10.1136/jitc-2020-000630] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/20/2020] [Indexed: 12/12/2022] Open
Abstract
Background Recently, anti-CD38 monoclonal antibody (Mab) therapy has become a focus of attention as an additional/alternative option for many hematological neoplasms including T-cell acute lymphoblastic leukemia (T-ALL). It has been shown that antitumor efficacy of anti-CD38-Mab depends on the level of CD38 expression on tumor cells. Reports on CD38 expression in T-ALL are scarce, and data on the effect of cytotoxic chemotherapy on CD38 expression are limited to very few samples. Moreover, it lacks entirely in refractory disease and in adult T-ALL. We report the flow cytometric evaluation of CD38 expression in T-ALL blasts at diagnosis and the effect of cytotoxic chemotherapy on its expression in measurable residual disease (MRD), refractory disease (MRD≥5%), and relapsed disease in a large cohort of T-ALL. Methods The study included 347 samples (188 diagnostic, 100 MRD, 24 refractory and 35 relapse samples) from 196 (children: 85; adolescents/adults: 111) patients with T-ALL. CD38-positive blasts percentages (CD38-PBPs) and expression-intensity (mean fluorescent intensity, CD38-MFI) were studied using multicolor flow cytometry (MFC). MFC-based MRD was performed at the end-of-induction (EOI-MRD, day 30–35) and end-of-consolidation (EOC-MRD, day 78–85) subsequent follow-up (SFU-MRD) points. Results Patients were classified into early thymic precursor subtype of T-ALL (ETPALL, 54/188, 28.7%), and non-ETPALL (134/188, 71.3%). Of 188, EOI-MRD assessment was available in 152, EOC-MRD was available in 96 and SFU-MRD was available in 14 patients. CD38 was found positive in 97.9% (184/188) of diagnostic, 88.7% (110/124) MRD (including 24-refractory) and 82.9% (29/35) relapsed samples. Median (95% CI) of CD38-PBPs/MFI in diagnostic, MRD, refractory, and relapsed T-ALL samples were, respectively, 85.9% (82.10%–89.91%)/4.2 (3.88–4.47), 74.0% (58.87%–83.88%)/4.6 (3.67–6.81), 79.6% (65.25%–96.11%)/4.6 (3.33–8.47) and 85.2% (74.48%–93.01%)/5.6 (4.14–8.99). No significant difference was noted in CD38 expression between pediatric versus adult and patients with ETPALL versus non-ETPALL. No change was observed in CD38-MFI between diagnostic versus MRD and diagnostic versus relapsed paired samples. However, we noticed a mild drop in the CD38-PBPs in MRD samples compared with the diagnostic samples (p=0.016). Conclusion We report an in-depth analysis of CD38 expression in a large cohort of T-ALL at diagnosis, during chemotherapy, and at relapse. Our data demonstrated that CD38 is robustly expressed in T-ALL blasts with a little effect of cytotoxic chemotherapy making it a potentially effective target for antiCD38-Mab therapy.
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Affiliation(s)
- Prashant Ramesh Tembhare
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India .,Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Harshini Sriram
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Twinkle Khanka
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Gaurav Chatterjee
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Devasis Panda
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Sitaram Ghogale
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Yajamanam Badrinath
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Nilesh Deshpande
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Nikhil V Patkar
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Gaurav Narula
- Homi Bhabha National Institute, Mumbai, Maharashtra, India.,Department of Pediatric Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Bhausaheb Bagal
- Homi Bhabha National Institute, Mumbai, Maharashtra, India.,Department of Medical Oncology, Tata Memorial Center, Mumbai, Maharashtra, India
| | - Hasmukh Jain
- Homi Bhabha National Institute, Mumbai, Maharashtra, India.,Department of Medical Oncology, Tata Memorial Center, Mumbai, Maharashtra, India
| | - Manju Sengar
- Homi Bhabha National Institute, Mumbai, Maharashtra, India.,Department of Medical Oncology, Tata Memorial Center, Mumbai, Maharashtra, India
| | - Navin Khattry
- Homi Bhabha National Institute, Mumbai, Maharashtra, India.,Department of Medical Oncology, Tata Memorial Center, Mumbai, Maharashtra, India
| | - Shripad Banavali
- Homi Bhabha National Institute, Mumbai, Maharashtra, India.,Department of Pediatric Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Sumeet Gujral
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Papagudi G Subramanian
- Hematopathology Laboratory, Tata Memorial Centre, Navi Mumbai, Maharashtra, India.,Homi Bhabha National Institute, Mumbai, Maharashtra, India
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7
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Abstract
Effective leukemia treatment is seriously hampered by drug resistance, and the potential role of epigenetic mechanisms in cancer drug resistance has recently been investigated. With conventional anticancer drugs, including alkylating drugs, anti-metabolite drugs, topoisomerase inhibitors, and microtubule inhibitors-which have been available for half a century-drug resistance often develops because of decreased expression of target enzymes, in conjunction with increased expression of drug export pumps. Alterations of target gene expression and increased export pump function might be caused by epigenetic changes, such as alterations in methylation status, as well as by changes in histone acetylation status. In addition, newly developed anticancer drugs, including small-molecule drugs, such as kinase inhibitors, antibody drugs, and immune modulatory drugs, also resulted in development of drug resistance within 1 year, although these drugs showed significant effectiveness for patients resistant to conventional anticancer drugs. The resistant cells exhibited increased expression of bypass pathways, activation of downstream cascades, decreased expression of antigens of tumor cells, increased DNA repair activity, and increased expression of drug export pumps, which also suggests the presence of epigenetic changes. This article reviews drug resistance in cancer therapy and the possible roles of epigenetic mechanisms.
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Affiliation(s)
- Takeshi Asano
- Department of Pediatrics, Nippon Medical School, Tokyo, Japan
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8
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Patiño-Escobar B, Ramos R, Linares M, Mejía A, Alcalá S. CD38: From Positive to Negative Expression after Daratumumab Treatment. Cureus 2020; 12:e7627. [PMID: 32399359 PMCID: PMC7213648 DOI: 10.7759/cureus.7627] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
CD38 is a glycoprotein expressed at a low level in myeloid and lymphoid tissues. However, it is highly and homogeneously expressed in plasma cells (PC) in multiple myeloma. Daratumumab is a human CD38-specific IgG1 antibody available for the treatment of multiple myeloma in Colombia. It has been authorized in relapsed/refractory disease as front-line treatment for non-eligible stem cell transplantation patients by INVIMA (Instituto Nacional de Vigilancia de Medicamentos y Alimentos) that is the regulatory agency. Daratumumab treatment has been associated with the negativization of the expression of CD38 in PC, demonstrating a resistance mechanism under the clonal evolution theory. We report the case of a 63-year-old male, diagnosed with a relapsed/refractory multiple myeloma, heavily treated, who expressed strong CD38 marker at the beginning of the treatment, with a posterior negativization of CD38 after four cycles of treatment with daratumumab.
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Affiliation(s)
| | - Roberto Ramos
- Hematology, Instituto Nacional de Cancerología, Bogota, COL
| | - Maximo Linares
- Hematology, Instituto Nacional de Cancerología, Bogota, COL
| | - Angie Mejía
- Hematology, Instituto Nacional de Cancerología, Bogota, COL
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9
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Zhao S, Fang S, Liu Y, Li X, Liao S, Chen J, Liu J, Zhao L, Li H, Zhou W, Shen W, Dong X, Xiang R, Wang L, Zhao Y. The long non-coding RNA NONHSAG026900 predicts prognosis as a favorable biomarker in patients with diffuse large B-cell lymphoma. Oncotarget 2018; 8:34374-34386. [PMID: 28423735 PMCID: PMC5470975 DOI: 10.18632/oncotarget.16163] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 02/24/2017] [Indexed: 12/11/2022] Open
Abstract
Long non-coding RNAs are known to be involved in cancer progression, but their biological functions and prognostic values are still largely unexplored in diffuse large B-cell lymphoma. In this study, long non-coding RNAs expression was characterized in 1,403 samples including normal and diffuse large B-cell lymphoma by repurposing 7 microarray datasets. Compared with any stage of normal B cells, NONHSAG026900 expression was significantly decreased in tumor samples. And in germinal center B-cell subtype, the significantly higher expression of NONHSAG026900 indicated it was a favorable prognosis biomarker. Then the prognostic power of NONHSAG026900 was validated with another independent dataset and NONHSAG026900 improved the predictive power of International Prognostic Index as an independent factor. Moreover, functional prediction and validation demonstrated that NONHSAG026900 could inhibit cell cycle activity to restrain tumor proliferation. These findings identified NONHSAG026900 as a novel prognostic biomarker and offered a new therapeutic target for diffuse large B-cell lymphoma patients.
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Affiliation(s)
- Shuangtao Zhao
- Department of Radiation Oncology, National Cancer Center/Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Shuangsang Fang
- The Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
| | - Yanhua Liu
- The School of Medicine, Nankai University, Tianjin, China.,The Collaborative Innovation Center for Biotherapy, Nankai University, Tianjin, China.,The Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Tianjin, China
| | - Xixi Li
- The School of Medicine, Nankai University, Tianjin, China.,Department of Pathology, Nankai University, Tianjin, China
| | - Shengyou Liao
- The Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
| | - Jinwen Chen
- The Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
| | - Jingjia Liu
- The Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
| | - Lianhe Zhao
- The Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
| | - Hui Li
- The Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
| | - Wei Zhou
- The School of Medicine, Nankai University, Tianjin, China.,The Collaborative Innovation Center for Biotherapy, Nankai University, Tianjin, China.,The Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Tianjin, China
| | - Wenzhi Shen
- The School of Medicine, Nankai University, Tianjin, China.,The Collaborative Innovation Center for Biotherapy, Nankai University, Tianjin, China.,The Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Tianjin, China
| | - Xiaoli Dong
- The School of Medicine, Nankai University, Tianjin, China.,The Collaborative Innovation Center for Biotherapy, Nankai University, Tianjin, China.,The Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Tianjin, China
| | - Rong Xiang
- The School of Medicine, Nankai University, Tianjin, China.,The Collaborative Innovation Center for Biotherapy, Nankai University, Tianjin, China.,The Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Tianjin, China
| | - Luhua Wang
- Department of Radiation Oncology, National Cancer Center/Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Yi Zhao
- The Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
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10
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Tomita A. Genetic and Epigenetic Modulation of CD20 Expression in B-Cell Malignancies: Molecular Mechanisms and Significance to Rituximab Resistance. J Clin Exp Hematop 2017; 56:89-99. [PMID: 27980307 DOI: 10.3960/jslrt.56.89] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
CD20 is a differentiation related cell surface phosphoprotein that is expressed during early pre-B cell stages until plasma cell differentiation, and is a suitable molecular target for B-cell malignancies by monoclonal antibodies such as rituximab, ofatumumab, obinutuzumab and others. CD20 expression is confirmed in most B-cell malignancies; however, the protein expression level varies in each patient, even in de novo tumors, and down-modulation of CD20 expression after chemoimmunotherapy with rituximab, resulting in rituximab resistance, has been recognized in the clinical setting. Recent reports suggest that genetic and epigenetic mechanisms are correlated with aberrantly low CD20 expression in de novo tumors and relapsed/refractory disease after using rituximab. Furthermore, some targeting drugs, such as lenalidomide, bortezomib and ibrutinib, directly or indirectly affect CD20 protein expression. CD20-negative phenotypically-changed DLBCL after rituximab use tends to show an aggressive clinical course and poor outcome with resistance to not only rituximab, but also conventional salvage chemo-regimens. Understanding of the mechanisms of CD20-negative phenotype may contribute to establish strategies for overcoming chemo-refractory B-cell malignancies. In this manuscript, recent progress of research on molecular and clinical features of CD20 protein and CD20-negative B-cell malignancies was reviewed.
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Affiliation(s)
- Akihiro Tomita
- Department of Hematology and Oncology, Nagoya University Graduate School of Medicine
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11
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Nakatsuka SI, Yutani C, Kurashige M, Kohara M, Nagano T, Goto T, Takatsuka H, Ifuku H, Morii E. An unusual case of Epstein-Barr virus-positive large B-cell lymphoma lacking various B-cell markers. Diagn Pathol 2017; 12:15. [PMID: 28143608 PMCID: PMC5282821 DOI: 10.1186/s13000-017-0606-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 01/23/2017] [Indexed: 12/15/2022] Open
Abstract
Backgroud Epstein-Barr virus (EBV) is associated with B-cell lymphoma in various conditions, such as immunodeficiency and chronic inflammation. We report an unusual case of EBV-positive diffuse large B-cell lymphoma (DLBCL) lacking the expression of many B-cell markers. Case presentation An 83-year-old man presented with a submandibular tumor. Histology of a lymph node biopsy specimen revealed diffuse proliferation of centroblast- or immunoblast-like lymphoid cells with plasmacytic differentiation. Scattered Hodgkin/Reed-Sternberg-like cells were also visible. A routine immunohistochemistry antibody panel revealed that the tumor cells were negative for B-cell and T-cell markers (i.e., CD3, CD19, CD20, CD38, CD45RO, CD79a, CD138, and Pax-5), but were positive for CD30 and MUM-1, not defining the lineage of tumor cells. The final diagnosis of EBV-positive DLBCL was confirmed based on the expression of B-cell-specific transcription factors (Oct-2 and BOB.1), PCR-based identification of monoclonal rearrangement of the immunoglobulin genes, and the presence of EBV-encoded small RNAs in the tumor cells (identified using in situ hybridization). Conclusion The downregulation of broad band of B-cell markers in the present case with EBV-positive DLBCL posed a diagnostic dilemma, as the possible diagnoses included differentiation from anaplastic large cell lymphoma and CD20-negative B-cell lymphomas. Results of immunohistochemical panel including B-cell-specific transcription factors and gene rearrangement analyses critically support the correct diagnosis.
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Affiliation(s)
- Shin-Ichi Nakatsuka
- Department of Pathology, Kansai Rosai Hospital, 3-1-69 Inabaso, 660-8511, Amagasaki, Hyogo, Japan.
| | - Chikao Yutani
- Department of Pathology, Amagasaki Central Hospital, 1-12-1 Shioe, 661-0976, Amagasaki, Hyogo, Japan
| | - Masako Kurashige
- Department of Pathology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, 565-0871, Suita, Osaka, Japan
| | - Masaharu Kohara
- Department of Pathology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, 565-0871, Suita, Osaka, Japan
| | - Teruaki Nagano
- Department of Pathology, Kansai Rosai Hospital, 3-1-69 Inabaso, 660-8511, Amagasaki, Hyogo, Japan
| | - Takayoshi Goto
- Department of Pathology, Kansai Rosai Hospital, 3-1-69 Inabaso, 660-8511, Amagasaki, Hyogo, Japan
| | - Hiroyuki Takatsuka
- Department of Internal Medicine, Amagasaki Central Hospital, 1-12-1 Shioe, 661-0976, Amagasaki, Hyogo, Japan
| | - Hidetaka Ifuku
- Department of Internal Medicine, Amagasaki Central Hospital, 1-12-1 Shioe, 661-0976, Amagasaki, Hyogo, Japan
| | - Eiichi Morii
- Department of Pathology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, 565-0871, Suita, Osaka, Japan
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12
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Assessment of CD37 B-cell antigen and cell of origin significantly improves risk prediction in diffuse large B-cell lymphoma. Blood 2016; 128:3083-3100. [PMID: 27760757 DOI: 10.1182/blood-2016-05-715094] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 10/11/2016] [Indexed: 01/21/2023] Open
Abstract
CD37 (tetraspanin TSPAN26) is a B-cell surface antigen widely expressed on mature B cells. CD37 is involved in immune regulation and tumor suppression but its function has not been fully elucidated. We assessed CD37 expression in de novo diffuse large B-cell lymphoma (DLBCL), and investigated its clinical and biologic significance in 773 patients treated with rituximab plus cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) and 231 patients treated with CHOP. We found that CD37 loss (CD37-) in ∼60% of DLBCL patients showed significantly decreased survival after R-CHOP treatment, independent of the International Prognostic Index (IPI), germinal center B-cell-like (GCB)/activated B-cell-like (ABC) cell of origin, nodal/extranodal primary origin, and the prognostic factors associated with CD37-, including TP53 mutation, NF-κBhigh, Mychigh, phosphorylated STAT3high, survivinhigh, p63-, and BCL6 translocation. CD37 positivity predicted superior survival, abolishing the prognostic impact of high IPI and above biomarkers in GCB-DLBCL but not in ABC-DLBCL. Combining risk scores for CD37- status and ABC cell of origin with the IPI, defined as molecularly adjusted IPI for R-CHOP (M-IPI-R), or IPI plus immunohistochemistry (IHC; IPI+IHC) for CD37, Myc, and Bcl-2, significantly improved risk prediction over IPI alone. Gene expression profiling suggested that decreased CD20 and increased PD-1 levels in CD37- DLBCL, ICOSLG upregulation in CD37+ GCB-DLBCL, and CD37 functions during R-CHOP treatment underlie the pivotal role of CD37 status in clinical outcomes. In conclusion, CD37 is a critical determinant of R-CHOP outcome in DLBCL especially in GCB-DLBCL, representing its importance for optimal rituximab action and sustained immune responses. The combined molecular and clinical prognostic indices, M-IPI-R and IPI+IHC, have remarkable predictive values in R-CHOP-treated DLBCL.
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13
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CD38 expression and complement inhibitors affect response and resistance to daratumumab therapy in myeloma. Blood 2016; 128:959-70. [DOI: 10.1182/blood-2016-03-703439] [Citation(s) in RCA: 224] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 06/08/2016] [Indexed: 12/25/2022] Open
Abstract
Key Points
Response to the CD38-targeting antibody daratumumab is significantly associated with CD38 expression levels on the tumor cells. Resistance to daratumumab is accompanied by increased expression of complement-inhibitory proteins.
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14
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Abstract
Diffuse large B-cell lymphoma (DLBCL) is an aggressive disease with considerable heterogeneity reflected in the 2008 World Health Organization classification. In recent years, genome-wide assessment of genetic and epigenetic alterations has shed light upon distinct molecular subsets linked to dysregulation of specific genes or pathways. Besides fostering our knowledge regarding the molecular complexity of DLBCL types, these studies have unraveled previously unappreciated genetic lesions, which may be exploited for prognostic and therapeutic purposes. Following the last World Health Organization classification, we have witnessed the emergence of new variants of specific DLBCL entities, such as CD30 DLBCL, human immunodeficiency virus-related and age-related variants of plasmablastic lymphoma, and EBV DLBCL arising in young patients. In this review, we will present an update on the clinical, pathologic, and molecular features of DLBCL incorporating recently gained information with respect to their pathobiology and prognosis. We will emphasize the distinctive features of newly described or emerging variants and highlight advances in our understanding of entities presenting a diagnostic challenge, such as T-cell/histiocyte-rich large B-cell lmphoma and unclassifiable large B-cell lymphomas. Furthermore, we will discuss recent advances in the genomic characterization of DLBCL, as they may relate to prognostication and tailored therapeutic intervention. The information presented in this review derives from English language publications appearing in PubMed throughout December 2015. For a complete outline of this paper, please visit: http://links.lww.com/PAP/A12.
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15
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Choi CH, Park YH, Lim JH, Choi SJ, Kim L, Park IS, Han JY, Kim JM, Chu YC. Prognostic Implication of Semi-quantitative Immunohistochemical Assessment of CD20 Expression in Diffuse Large B-Cell Lymphoma. J Pathol Transl Med 2016; 50:96-103. [PMID: 26875759 PMCID: PMC4804151 DOI: 10.4132/jptm.2016.01.12] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 01/04/2016] [Accepted: 01/12/2016] [Indexed: 01/09/2023] Open
Abstract
Background: Immunohistochemical demonstration of CD20 in diffuse large B-cell lymphoma (DLBCL) is prerequisite not only for the diagnosis but also for assigning patients to rituximab-containing chemotherapy. However, little is known about the impact of abundance of CD20 expression assessed by immunohistochemistry on the clinical outcome of DLBCL. We performed a semi-quantitative immunohistochemical analysis of CD20 expression in DLBCL to examine the prognostic implication of the level of CD20 expression. Methods: Pre-treatment diagnostic tissue samples from 48 DLBCL patients who were treated with rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) regimen were represented in a tissue microarray and immunostained for CD20. The relative abundance of CD20 expression was semi-quantitatively scored using a web-based ImmunoMembrane plug-in. Receiver operating characteristic curve analysis was used to determine a prognostically relevant cut-off score in order to dichotomize the patients into CD20-high versus CD20-low groups. Results: The levels of CD20 expression were heterogeneous among the patients, with a wide and linear distribution of scores. Patients in CD20-low group showed significantly poor clinical outcome. Conclusions: The levels of CD20 expression in DLBCL are heterogeneous among the patients with DLBCL. A subgroup of the patients with CD20 expression levels below the cut-off score showed poor clinical outcome.
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Affiliation(s)
- Chang Hwan Choi
- Department of Pathology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
| | - Young Hoon Park
- Department of Hematology-Oncology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
| | - Joo Han Lim
- Department of Hematology-Oncology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
| | - Suk Jin Choi
- Department of Pathology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
| | - Lucia Kim
- Department of Pathology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
| | - In Suh Park
- Department of Pathology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
| | - Jee Young Han
- Department of Pathology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
| | - Joon Mee Kim
- Department of Pathology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
| | - Young Chae Chu
- Department of Pathology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
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16
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Lu Y, Gao X, Fang M. [CD20-negative primary intestinal diffuse large B-cell lymphoma:a case report and literature review]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2015; 36:430-2. [PMID: 26031534 PMCID: PMC7342582 DOI: 10.3760/cma.j.issn.0253-2727.2015.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Yue Lu
- Department of Hematology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China
| | - Xue Gao
- Department of Hematology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China
| | - Meiyun Fang
- Department of Hematology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China
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17
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Upregulation of CD38 expression on multiple myeloma cells by all-trans retinoic acid improves the efficacy of daratumumab. Leukemia 2015; 29:2039-49. [PMID: 25975191 DOI: 10.1038/leu.2015.123] [Citation(s) in RCA: 206] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 04/21/2015] [Accepted: 05/05/2015] [Indexed: 12/21/2022]
Abstract
Daratumumab is an anti-CD38 monoclonal antibody with lytic activity against multiple myeloma (MM) cells, including ADCC (antibody-dependent cellular cytotoxicity) and CDC (complement-dependent cytotoxicity). Owing to a marked heterogeneity of response to daratumumab therapy in MM, we investigated determinants of the sensitivity of MM cells toward daratumumab-mediated ADCC and CDC. In bone marrow samples from 144 MM patients, we observed no difference in daratumumab-mediated lysis between newly diagnosed or relapsed/refractory patients. However, we discovered, next to an expected effect of effector (natural killer cells/monocytes) to target (MM cells) ratio on ADCC, a significant association between CD38 expression and daratumumab-mediated ADCC (127 patients), as well as CDC (56 patients). Similarly, experiments with isogenic MM cell lines expressing different levels of CD38 revealed that the level of CD38 expression is an important determinant of daratumumab-mediated ADCC and CDC. Importantly, all-trans retinoic acid (ATRA) increased CD38 expression levels but also reduced expression of the complement-inhibitory proteins CD55 and CD59 in both cell lines and primary MM samples. This resulted in a significant enhancement of the activity of daratumumab in vitro and in a humanized MM mouse model as well. Our results provide the preclinical rationale for further evaluation of daratumumab combined with ATRA in MM patients.
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18
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Zhang LN, Wang L, Fang C, Zou ZJ, Fan L, Zhang R, Young KH, Li JY, Xu W. The significance of single nucleotide polymorphism rs2070770 inCD20gene in Chinese patients with diffuse large B-cell lymphoma. Leuk Lymphoma 2014; 56:676-81. [DOI: 10.3109/10428194.2014.927455] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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19
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Luu VP, Hevezi P, Vences-Catalan F, Maravillas-Montero JL, White CA, Casali P, Llorente L, Jakez-Ocampo J, Lima G, Vilches-Cisneros N, Flores-Gutiérrez JP, Santos-Argumedo L, Zlotnik A. TSPAN33 is a novel marker of activated and malignant B cells. Clin Immunol 2013; 149:388-99. [PMID: 24211713 DOI: 10.1016/j.clim.2013.08.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 08/01/2013] [Accepted: 08/03/2013] [Indexed: 12/24/2022]
Abstract
We have identified Tspan33 as a gene encoding a transmembrane protein exhibiting a restricted expression pattern including expression in activated B cells. TSPAN33 is a member of the tetraspanin family. TSPAN33 is not expressed in resting B cells, but is strongly induced in primary human B cells following activation. Human 2E2 cells, a Burkitt's lymphoma-derived B cell model of activation and differentiation, also upregulate TSPAN33 upon activation. TSPAN33 is expressed in several lymphomas including Hodgkin's and Diffuse large B cell lymphoma. TSPAN33 is also expressed in some autoimmune diseases where B cells participate in the pathology, including rheumatoid arthritis patients, systemic lupus erythematosus (SLE), and in spleen B cells from MRL/Fas(lpr/lpr) mice (a mouse model of SLE). We conclude that TSPAN33 may be used as a diagnostic biomarker or as a target for therapeutic antibodies for treatment of certain B cell lymphomas or autoimmune diseases.
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Affiliation(s)
- Van Phi Luu
- Department of Physiology and Biophysics, University of California Irvine, Irvine, CA, USA; Institute for Immunology, University of California Irvine, Irvine, CA, USA
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20
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Fang C, Zhuang Y, Wang L, Fan L, Wu YJ, Zhang R, Zou ZJ, Zhang LN, Yang S, Xu W, Li JY. High levels of CD20 expression predict good prognosis in chronic lymphocytic leukemia. Cancer Sci 2013; 104:996-1001. [PMID: 23659384 DOI: 10.1111/cas.12192] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 04/16/2013] [Accepted: 04/25/2013] [Indexed: 11/30/2022] Open
Abstract
Heterogeneity of CD20 expression exists in chronic lymphocytic leukemia (CLL), therefore, we explored the prognostic significance of CD20 expression in Chinese patients with CLL. Multiparameter flow cytometry was used to detect the expression of CD20 in CD5(+) CD19(+) cells. In 172 CLL patients, the median expression percent of CD20 was 97.82% (range, 0-100), and the median mean fluorescence intensity (MFI) of CD20 in CLL cells was 731.45 (range, 0.00-9071.90). The percentage of CD20(+) cells in the patient group with mutated variable region of immunoglobulin genes (IGHV) was higher than in the non-mutant IGHV group (mean, 92.1% vs 80.4%, P < 0.001). There were no differences in the MFI of CD20(+) cells in all prognostic factor groups. Representation of the data using a receiver operating characteristic plot reflected separation between the two IGHV groups, with an area under the curve of 0.661 (95% confidence interval, 0.569-0.753). At the cut-off value of 60.3% for percentage of CD20, the sensitivity and specificity were 90.00% and 38.46%, respectively. Patients whose percentage of CD20 antigen was above 60.3% had longer treatment-free survival (hazard ratio, 0.452; 95% confidence interval, 0.232-0.884, P = 0.020). Percentage and MFI of CD20 were the variables not associated with treatment-free survival by multivariate Cox regression analysis (P < 0.05). High level of CD20 expression in de novo CLL appears to be associated with a good prognosis.
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Affiliation(s)
- Cheng Fang
- Department of Hematology, First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
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21
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Wang T, Ghaffar H, Grin A. Intravascular large B-cell lymphoma presenting with fulminant pseudomembranous colitis. Pathol Res Pract 2013; 209:323-6. [DOI: 10.1016/j.prp.2013.03.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Revised: 02/27/2013] [Accepted: 03/14/2013] [Indexed: 10/27/2022]
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