1
|
Sugawara S, Hueber B, Woolley G, Terry K, Kroll K, Manickam C, Ram DR, Ndhlovu LC, Goepfert P, Jost S, Reeves RK. Multiplex interrogation of the NK cell signalome reveals global downregulation of CD16 signaling during lentivirus infection through an IL-18/ADAM17-dependent mechanism. PLoS Pathog 2023; 19:e1011629. [PMID: 37669308 PMCID: PMC10503717 DOI: 10.1371/journal.ppat.1011629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Revised: 09/15/2023] [Accepted: 08/21/2023] [Indexed: 09/07/2023] Open
Abstract
Despite their importance, natural killer (NK) cell responses are frequently dysfunctional during human immunodeficiency virus-1 (HIV-1) and simian immunodeficiency virus (SIV) infections, even irrespective of antiretroviral therapies, with poorly understood underlying mechanisms. NK cell surface receptor modulation in lentivirus infection has been extensively studied, but a deeper interrogation of complex cell signaling is mostly absent, largely due to the absence of any comprehensive NK cell signaling assay. To fill this knowledge gap, we developed a novel multiplex signaling analysis to broadly assess NK cell signaling. Using this assay, we elucidated that NK cells exhibit global signaling reduction from CD16 both in people living with HIV-1 (PLWH) and SIV-infected rhesus macaques. Intriguingly, antiretroviral treatment did not fully restore diminished CD16 signaling in NK cells from PLWH. As a putative mechanism, we demonstrated that NK cells increased surface ADAM17 expression via elevated plasma IL-18 levels during HIV-1 infection, which in turn reduced surface CD16 downregulation. We also illustrated that CD16 expression and signaling can be restored by ADAM17 perturbation. In summary, our multiplex NK cell signaling analysis delineated unique NK cell signaling perturbations specific to lentiviral infections, resulting in their dysfunction. Our analysis also provides mechanisms that will inform the restoration of dysregulated NK cell functions, offering potential insights for the development of new NK cell-based immunotherapeutics for HIV-1 disease.
Collapse
Affiliation(s)
- Sho Sugawara
- Division of Innate and Comparative Immunology, Center for Human Systems Immunology, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University, Durham, North Carolina, United States of America
| | - Brady Hueber
- Division of Innate and Comparative Immunology, Center for Human Systems Immunology, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University, Durham, North Carolina, United States of America
| | - Griffin Woolley
- Division of Innate and Comparative Immunology, Center for Human Systems Immunology, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University, Durham, North Carolina, United States of America
| | - Karen Terry
- Division of Innate and Comparative Immunology, Center for Human Systems Immunology, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University, Durham, North Carolina, United States of America
| | - Kyle Kroll
- Division of Innate and Comparative Immunology, Center for Human Systems Immunology, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University, Durham, North Carolina, United States of America
| | - Cordelia Manickam
- Division of Innate and Comparative Immunology, Center for Human Systems Immunology, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University, Durham, North Carolina, United States of America
| | - Daniel R. Ram
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Lishomwa C. Ndhlovu
- Department of Medicine, Division of Infectious Diseases, Weill Cornell Medicine, New York City, New York, United States of America
| | - Paul Goepfert
- University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Stephanie Jost
- Division of Innate and Comparative Immunology, Center for Human Systems Immunology, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University, Durham, North Carolina, United States of America
| | - R. Keith Reeves
- Division of Innate and Comparative Immunology, Center for Human Systems Immunology, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Surgery, Duke University, Durham, North Carolina, United States of America
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| |
Collapse
|
2
|
Kläsener K, Jellusova J, Andrieux G, Salzer U, Böhler C, Steiner SN, Albinus JB, Cavallari M, Süß B, Voll RE, Boerries M, Wollscheid B, Reth M. CD20 as a gatekeeper of the resting state of human B cells. Proc Natl Acad Sci U S A 2021; 118:e2021342118. [PMID: 33563755 DOI: 10.1073/pnas.2021342118] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Worldwide about one million patients are given anti-CD20 antibodies such as rituximab (RTX) for the treatment of B cell-associated diseases. Despite the success of this first therapeutic antibody, little is known about the function of its target. The role of CD20 only becomes clear in the context of the nanoscale compartmentalization of the B lymphocyte membrane. We found that CD20 is an organizer of the IgD-class nanocluster on the B cell membrane. The loss of CD20 on human B cells results in a dissolution of the IgD-class nanocluster and a transient B cell activation inducing a B cell-to-PC differentiation. Thus, CD20 is an essential gatekeeper of a membrane nanodomain and the resting state of naive B cells. CD20 is a B cell-specific membrane protein and represents an attractive target for therapeutic antibodies. Despite widespread usage of anti-CD20 antibodies for B cell depletion therapies, the biological function of their target remains unclear. Here, we demonstrate that CD20 controls the nanoscale organization of receptors on the surface of resting B lymphocytes. CRISPR/Cas9-mediated ablation of CD20 in resting B cells resulted in relocalization and interaction of the IgM-class B cell antigen receptor with the coreceptor CD19. This receptor rearrangement led to a transient activation of B cells, accompanied by the internalization of many B cell surface marker proteins. Reexpression of CD20 restored the expression of the B cell surface proteins and the resting state of Ramos B cells. Similarly, treatment of Ramos or naive human B cells with the anti-CD20 antibody rituximab induced nanoscale receptor rearrangements and transient B cell activation in vitro and in vivo. A departure from the resting B cell state followed by the loss of B cell identity of CD20-deficient Ramos B cells was accompanied by a PAX5 to BLIMP-1 transcriptional switch, metabolic reprogramming toward oxidative phosphorylation, and a shift toward plasma cell development. Thus, anti-CD20 engagement or the loss of CD20 disrupts membrane organization, profoundly altering the fate of human B cells.
Collapse
|
3
|
Abstract
Natural killer (NK) cells are one of the critical innate immune effector cells that directly kill tumors and virus-infected cells, and modulate other immune cells including dendritic cells, CD4+ and CD8+ T cells. Signals from activating and inhibitory surface receptors orchestrate the regulatory and cytotoxic functions of NK cells. Although a number of surface receptors are involved, multiple signaling molecules are shared so that NK cell responses are synergistically regulated. Many pathogens and tumors evade NK cell responses by targeting NK cell signaling. Particularly in HIV/simian immunodeficiency virus (SIV) infection, the NK cell repertoire is diminished by changes in subsets of NK cells, expression of activating and inhibitory receptors, and intracellular signaling molecules. However, in-depth studies on intracellular signaling in NK cells in HIV/SIV infections remain limited. Checkpoint blockade and chimeric antigen receptor (CAR)-NK cells have demonstrated enhanced NK cell activities against tumors and viral infections. In addition, targeting intracellular signaling molecules by small molecules could also improve NK cell responses towards HIV/SIV infection in vivo. Therefore, further understanding of NK cell signaling including identification of key signaling molecules is crucial to maximize the efficacy of NK cell-based treatments. Herein, we review the current state of the literature and outline potential future avenues where optimized NK cells could be utilized in HIV-1 cure strategies and other immunotherapeutics in PLWH.
Collapse
Affiliation(s)
- Sho Sugawara
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Cordelia Manickam
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Keith Reeves
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Ragon Institute of Massachusetts General Hospital, MIT, and Harvard, Cambridge, MA
| |
Collapse
|
4
|
Abstract
Understanding the cellular processes is central to comprehend disease conditions and is also true for cancer research. Proteomic studies provide significant insight into cancer mechanisms and aid in the diagnosis and prognosis of the disease. Phosphoproteome is one of the most studied complements of the whole proteome given its importance in the understanding of cellular processes such as signaling and regulations. Over the last decade, several new methods have been developed for phosphoproteome analysis. A significant amount of these efforts pertains to cancer research. The current use of powerful analytical instruments in phosphoproteomic approaches has paved the way for deeper and sensitive investigations. However, these methods and techniques need further improvements to deal with challenges posed by the complexity of samples and scarcity of phosphoproteins in the whole proteome, throughput and reproducibility. This review aims to provide a comprehensive summary of the variety of steps used in phosphoproteomic methods applied in cancer research including the enrichment and fractionation strategies. This will allow researchers to evaluate and choose a better combination of steps for their phosphoproteome studies.
Collapse
Affiliation(s)
- Mustafa Gani Sürmen
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Saime Sürmen
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Arslan Ali
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
| | - Syed Ghulam Musharraf
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
| | - Nesrin Emekli
- Department of Medical Biochemistry, Faculty of Medicine, Istanbul Medipol University, Istanbul, Turkey
| |
Collapse
|
5
|
Chappell DL, White MC, Damania B. Proteomic approaches to investigate gammaherpesvirus biology and associated tumorigenesis. Adv Virus Res 2021; 109:201-54. [PMID: 33934828 DOI: 10.1016/bs.aivir.2020.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The DNA viruses, Kaposi's sarcoma-associated herpesvirus (KSHV) and Epstein-Barr virus (EBV), are members of the gammaherpesvirus subfamily, a group of viruses whose infection is associated with multiple malignancies, including cancer. The primary host for these viruses is humans and, like all herpesviruses, infection with these pathogens is lifelong. Due to the persistence of gammaherpesvirus infection and the potential for cancer formation in infected individuals, there is a driving need to understand not only the biology of these viruses and how they remain undetected in host cells but also the mechanism(s) by which tumorigenesis occurs. One of the methods that has provided much insight into these processes is proteomics. Proteomics is the study of all the proteins that are encoded by a genome and allows for (i) identification of existing and novel proteins derived from a given genome, (ii) interrogation of protein-protein interactions within a system, and (iii) discovery of druggable targets for the treatment of malignancies. In this chapter, we explore how proteomics has contributed to our current understanding of gammaherpesvirus biology and their oncogenic processes, as well as the clinical applications of proteomics for the detection and treatment of gammaherpesvirus-associated cancers.
Collapse
|
6
|
Zhang J, Meng L, Jiang W, Zhang H, Zhou A, Zeng N. Identification of clinical molecular targets for childhood Burkitt lymphoma. Transl Oncol 2020; 13:100855. [PMID: 32947237 PMCID: PMC7502376 DOI: 10.1016/j.tranon.2020.100855] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/28/2020] [Accepted: 08/03/2020] [Indexed: 12/20/2022] Open
Abstract
Burkitt lymphoma (BL) is a malignant tumor in children. Although BL is generally curable, early relapse and refractoriness may occur. Some molecular indicators have been recently suggested for BL diagnosis, but large heterogeneity still exists. This study aimed at providing clinical molecular targets and methods that may help improve diagnosis and treatment of childhood BL. Only children patients were included in the study, and targeted gene sequencing was conducted to identify tumor specific mutations. The mRNA and protein level expression of potential target genes were measured by real-time PCR and immunohistochemistry. The relationship between BL specific gene mutation and differential expression with clinical features was analyzed. The results showed that i) detailed analysis of c-MYC/BCL2/BCL6 gene loci alteration and gene expression would help in accurate diagnosis and treatment determination of childhood BL; ii) loss-of-function mutations in SOCS1 or CIITA gene might be used as malignant markers for BL diagnosis and prognosis; iii) specific mutations of CD79A, MYD88, KLF2, DNMT3A and NFKBIE genes often concurrently existed in BL and showed association with benign clinical outcomes; iv) the high expression of MYC, TCF3 and loss-of-function ID3 genes in tumor may be potential therapeutic targets and could be used for treatment monitoring; and v) four MYC-translocation negative cases were re-defined as high-grade B-cell lymphoma-not otherwise specified (HGBL-NOS) but showed similar clinical outcomes and molecular features to other BL cases in the study, suggesting more studies needed to explore the molecular mechanisms and clinical significance of this provisional tumor entity. Detailed analysis of c-MYC/BCL2/BCL6 gene alteration and expression may help in accurate diagnosis and treatment; The MYC-translocation negative cases (HGBL-NOS) showed similar clinical outcomes and molecular features to other cases; Loss-of-function mutations of SOCS1 or CIITA gene could be used as malignant markers for diagnosis and prognosis; Concurrent mutations in CD79A, MYD88, KLF2, DNMT3A and NFKBIE genes associated with benign clinical outcomes; High expression of MYC, TCF3 and loss-of-function ID3 gene in tumor may be potential therapeutic targets.
Collapse
Affiliation(s)
- Jing Zhang
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Leijun Meng
- Department of Clinical Laboratory, Shanghai Children's Hospital, Shanghai 200040, China
| | - Weiyun Jiang
- Yu Kang Biotechnology Co., Ltd, Jiaxing 314100, Zhejiang, China
| | - Hong Zhang
- Department of Clinical Laboratory, Shanghai Children's Hospital, Shanghai 200040, China
| | - Aiwu Zhou
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Naiyan Zeng
- Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
| |
Collapse
|
7
|
Chu Y, Awasthi A, Lee S, Edani D, Yin C, Hochberg J, Shah T, Chung TH, Ayello J, van de Ven C, Klein C, Lee D, Cairo MS. Obinutuzumab (GA101) vs. rituximab significantly enhances cell death, antibody-dependent cytotoxicity and improves overall survival against CD20+ primary mediastinal B-cell lymphoma (PMBL) in a xenograft NOD-scid IL2Rgnull (NSG) mouse model: a potential targeted agent in the treatment of PMBL. Oncotarget 2020; 11:3035-3047. [PMID: 32850008 PMCID: PMC7429176 DOI: 10.18632/oncotarget.27691] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 07/14/2020] [Indexed: 12/21/2022] Open
Abstract
Primary mediastinal large B-cell lymphoma (PMBL), a distinct mature B-cell lymphoma, expresses CD20 and has recently been successfully treated with the combination of a type I anti-CD20 monoclonal antibody, rituximab, with multiple combination chemotherapy regimens. Obinutuzumab is a glycoengineered type II anti-CD20 monoclonal antibody (mAb), recognizing a unique CD20 extracellular membrane epitope with enhanced antibody dependent cellular cytotoxicity (ADCC) vs rituximab. We hypothesize that obinutuzumab vs rituximab will significantly enhance in-vitro and in-vivo cytotoxicity against PMBL. PMBL cells were treated with equal dose of obinutuzumab and rituximab for 24 hours (1–100 μg/ml). ADCC were performed with ex-vivo expanded natural killer cells at 10:1 E: T ratio. Mice were xenografted with intravenous injections of luciferase expressing Karpas1106P cells and treated every 7 days for 8 weeks. Tumor burden was monitored by IVIS spectrum system. Compared with rituximab, obinutuzumab significantly inhibited PMBL cell proliferation (p = 0.01), promoted apoptosis (p = 0.05) and enhanced ADCC (p = 0.0002) against PMBL. Similarly, in PMBL xenografted NOD scid gamma mice, obinutuzumab significantly enhanced survival than rituximab when treated with equal doses (p = 0.05). Taken together our results suggest that obinutuzumab significantly enhanced natural killer cytotoxicity, reduced PMBL proliferation and prolonged the overall survival in humanized PMBL xenografted NOD scid gamma mice.
Collapse
Affiliation(s)
- Yaya Chu
- Department of Pediatrics, New York Medical College, Valhalla, NY, USA.,Co-first authors
| | - Aradhana Awasthi
- Department of Pediatrics, New York Medical College, Valhalla, NY, USA.,Co-first authors
| | - Sanghoon Lee
- Department of Pediatrics, New York Medical College, Valhalla, NY, USA.,Department of Cell Biology & Anatomy, New York Medical College, Valhalla, NY, USA
| | - Dina Edani
- Department of Pediatrics, New York Medical College, Valhalla, NY, USA
| | - Changhong Yin
- Department of Pediatrics, New York Medical College, Valhalla, NY, USA
| | - Jessica Hochberg
- Department of Pediatrics, New York Medical College, Valhalla, NY, USA
| | - Tishi Shah
- Department of Pediatrics, New York Medical College, Valhalla, NY, USA
| | - Tae-Hoon Chung
- Cancer Science Institute of Singapore, National University of Singapore, Singapore
| | - Janet Ayello
- Department of Pediatrics, New York Medical College, Valhalla, NY, USA
| | | | - Christian Klein
- Roche Pharmaceutical Research & Early Development, Roche Innovation Center, Zurich, Switzerland
| | - Dean Lee
- Department of Pediatrics, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Mitchell S Cairo
- Department of Pediatrics, New York Medical College, Valhalla, NY, USA.,Department of Cell Biology & Anatomy, New York Medical College, Valhalla, NY, USA.,Department of Microbiology & Immunology, New York Medical College, Valhalla, NY, USA.,Department of Medicine, New York Medical College, Valhalla, NY, USA.,Department of Pathology, New York Medical College, Valhalla, NY, USA
| |
Collapse
|
8
|
Thomsen EA, Rovsing AB, Anderson MV, Due H, Huang J, Luo Y, Dybkaer K, Mikkelsen JG. Identification of BLNK and BTK as mediators of rituximab-induced programmed cell death by CRISPR screens in GCB-subtype diffuse large B-cell lymphoma. Mol Oncol 2020; 14:1978-1997. [PMID: 32585766 PMCID: PMC7463323 DOI: 10.1002/1878-0261.12753] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/15/2020] [Accepted: 06/18/2020] [Indexed: 12/19/2022] Open
Abstract
Diffuse large B‐cell lymphoma (DLBCL) is characterized by extensive genetic heterogeneity, and this results in unpredictable responses to the current treatment, R‐CHOP, which consists of a cancer drug combination supplemented with the humanized CD20‐targeting monoclonal antibody rituximab. Despite improvements in the patient response rate through rituximab addition to the treatment plan, up to 40% of DLBCL patients end in a relapsed or refractory state due to inherent or acquired resistance to the regimen. Here, we employ a lentiviral genome‐wide clustered regularly interspaced short palindromic repeats library screening approach to identify genes involved in facilitating the rituximab response in cancerous B cells. Along with the CD20‐encoding MS4A1 gene, we identify genes related to B‐cell receptor (BCR) signaling as mediators of the intracellular signaling response to rituximab. More specifically, the B‐cell linker protein (BLNK) and Bruton's tyrosine kinase (BTK) genes stand out as pivotal genes in facilitating direct rituximab‐induced apoptosis through mechanisms that occur alongside complement‐dependent cytotoxicity (CDC). Our findings demonstrate that rituximab triggers BCR signaling in a BLNK‐ and BTK‐dependent manner and support the existing notion that intertwined CD20 and BCR signaling pathways in germinal center B‐cell‐like‐subtype DLBCL lead to programmed cell death.
Collapse
Affiliation(s)
| | | | | | - Hanne Due
- Department of Hematology, Aalborg University Hospital, Denmark
| | - Jinrong Huang
- Department of Biomedicine, Aarhus University, Denmark.,Lars Bolund Institute of Regenerative Medicine, BGI-Qingdao, BGI-Shenzhen, China.,Department of Biology, University of Copenhagen, Denmark
| | - Yonglun Luo
- Department of Biomedicine, Aarhus University, Denmark.,Lars Bolund Institute of Regenerative Medicine, BGI-Qingdao, BGI-Shenzhen, China
| | - Karen Dybkaer
- Department of Hematology, Aalborg University Hospital, Denmark
| | | |
Collapse
|
9
|
Abstract
Rituximab was the first monoclonal antibody used for the treatment of a malignancy. In the 22 years since initial approval, it has become a vital component of therapy for a multitude of B-cell malignancies. Within the last several years, however, there has been a robust development of novel agents targeting CD20, including second generation anti-CD20 antibodies, biosimilar antibodies, and subcutaneous formulations that have been approved. The era of passive immunotherapy is now yielding to therapeutic approaches that actively engage the immune system. Emerging approaches leverage immunomodulatory drugs or novel checkpoint inhibitors to enhance CD20 therapy. Recent data sets on bispecific CD3/CD20 antibodies demonstrate exciting early findings, and CD20-directed chimeric antigen receptor T-cell therapies are now entering clinical trials. Anti-CD20 therapies are a vital component of the treatment of B-cell malignancies, and there is a dynamic therapeutic environment with multiple new data sets reviewed here.
Collapse
Affiliation(s)
- Jeff P Sharman
- Willamette Valley Cancer Institute/US Oncology, Eugene, OR
| |
Collapse
|
10
|
Abstract
The 6th International Symposium on Childhood, Adolescent and Young Adult (CAYA) Non-Hodgkin Lymphoma (NHL) was held in Rotterdam, Netherlands, 26-29 September, 2018. This summary manuscript is a perspective on the presentations from the plenary scientific sessions, including wellness and survivorship, B-cell NHL, AYA lymphoma, translational NHL biology, lymphoma immunology, bone marrow transplantation and cell therapy, T/Natural Killer cell lymphoma, anaplastic large cell lymphoma, lymphoblastic lymphoma, novel lymphoma therapeutics and Hodgkin lymphoma. The symposium was attended by over 260 registrants from 42 different countries and included young, middle and senior investigators. Finally, the Angelo Rosolen, MD, Memorial Lecture was delivered by Alfred Reiter, MD.
Collapse
Affiliation(s)
- Mitchell S. Cairo
- Departments of Pediatrics, Medicine, Pathology, Microbiology& Immunology, and Cell Biology & Anatomy, New York Medical College, Valhalla, NY, USA
| | - Auke Beishuizen
- Division of Paediatric Haemato-Oncology, Princess Maxima Centre for Paediatric Oncology, Utrecht
- Department of Paediatric Oncology/Haematology, Erasmus MC - Sophia Children’s Hospital, Rotterdam, The Netherlands
| |
Collapse
|
11
|
Affiliation(s)
- Mitchell S Cairo
- Pediatric Hematology, Oncology & Stem Cell Transplantation, New York Medical College, Valhalla, NY, USA
| |
Collapse
|
12
|
Ge X, Chen J, Li L, Ding P, Wang Q, Zhang W, Li L, Lv X, Zhou D, Jiang Z, Zeng H, Xu Y, Hou Y, Hu W. Midostaurin potentiates rituximab antitumor activity in Burkitt's lymphoma by inducing apoptosis. Cell Death Dis 2018; 10:8. [PMID: 30584254 PMCID: PMC6315025 DOI: 10.1038/s41419-018-1259-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 12/03/2018] [Indexed: 12/14/2022]
Abstract
An intensive short-term chemotherapy regimen has substantially prolonged the overall survival of Burkitt’s lymphoma (BL) patients, which has been further improved by addition of rituximab. However, the inevitable development of resistance to rituximab and the toxicity of chemotherapy remain obstacles. We first prepared two BL cell lines resistant to rituximab-mediated CDC. Using a phosphorylation antibody microarray, we revealed that PI3K/AKT pathway contained the most phosphorylated proteins/hits, while apoptosis pathway that may be regulated by PKC displayed the greatest fold enrichment in the resistant cells. The PI3K/AKT inhibitor IPI-145 failed to reverse the resistance. In contrast, the pan-PKC inhibitor midostaurin exhibited potent antitumor activity in both original and resistant cells, alone or in combination with rituximab. Notably, midostaurin promoted apoptosis by reducing the phosphorylation of PKC and consequently of downstream Bad, Bcl-2 and NF-κB. Therefore, midostaurin improved rituximab activity by supplementing pro-apoptotic effects. In vivo, midostaurin alone powerfully prolonged the survival of mice bearing the resistant BL cells compared to rituximab alone treatments. Addition of midostaurin to rituximab led to dramatically improved survival compared to rituximab but not midostaurin monotherapy. Our findings call for further evaluation of midostaurin alone or in combination with rituximab in treating resistant BL in particular.
Collapse
Affiliation(s)
- Xiaowen Ge
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jianfeng Chen
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences; Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Ling Li
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences; Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Peipei Ding
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences; Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Qi Wang
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences; Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Wei Zhang
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences; Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Luying Li
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences; Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Xinyue Lv
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences; Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Danlei Zhou
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences; Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Zhengzeng Jiang
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Haiying Zeng
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yifan Xu
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yingyong Hou
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai, China.
| | - Weiguo Hu
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences; Shanghai Medical College, Fudan University, Shanghai, 200032, China.
| |
Collapse
|