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Bhaduri-McIntosh S, Rousseau BA. KAP1/TRIM28 - antiviral and proviral protagonist of herpesvirus biology. Trends Microbiol 2024:S0966-842X(24)00138-0. [PMID: 38871562 DOI: 10.1016/j.tim.2024.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/19/2024] [Accepted: 05/21/2024] [Indexed: 06/15/2024]
Abstract
Dysregulation of the constitutive heterochromatin machinery (HCM) that silences pericentromeric regions and endogenous retroviral elements in the human genome has consequences for aging and cancer. By recruiting epigenetic regulators, Krüppel-associated box (KRAB)-associated protein 1 (KAP1/TRIM28/TIF1β) is integral to the function of the HCM. Epigenetically silencing DNA genomes of incoming herpesviruses to enforce latency, KAP1 and HCM also serve in an antiviral capacity. In addition to gene silencing, newer reports highlight KAP1's ability to directly activate cellular gene transcription. Here, we discuss the many facets of KAP1, including recent findings that unexpectedly connect KAP1 to the inflammasome, reveal KAP1 cleavage as a novel mode of regulation, and argue for a pro-herpesviral KAP1 function that ensures transition from transcription to replication of the herpesvirus genome.
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Affiliation(s)
- Sumita Bhaduri-McIntosh
- Division of Infectious Diseases, Department of Pediatrics, University of Florida, Gainesville, FL, USA; Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, FL, USA.
| | - Beth A Rousseau
- Division of Infectious Diseases, Department of Pediatrics, University of Florida, Gainesville, FL, USA
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2
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Zhou H, Deng N, Li Y, Hu X, Yu X, Jia S, Zheng C, Gao S, Wu H, Li K. Distinctive tumorigenic significance and innovative oncology targets of SUMOylation. Theranostics 2024; 14:3127-3149. [PMID: 38855173 PMCID: PMC11155398 DOI: 10.7150/thno.97162] [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: 04/10/2024] [Accepted: 05/13/2024] [Indexed: 06/11/2024] Open
Abstract
Protein SUMOylation, a post-translational modification, intricately regulates diverse biological processes including gene expression, cell cycle progression, signaling pathway transduction, DNA damage response, and RNA metabolism. This modification contributes to the acquisition of tumorigenicity and the maintenance of cancer hallmarks. In malignancies, protein SUMOylation is triggered by various cellular stresses, promoting tumor initiation and progression. This augmentation is orchestrated through its specific regulatory mechanisms and characteristic biological functions. This review focuses on elucidating the fundamental regulatory mechanisms and pathological functions of the SUMO pathway in tumor pathogenesis and malignant evolution, with particular emphasis on the tumorigenic potential of SUMOylation. Furthermore, we underscore the potential therapeutic benefits of targeting the SUMO pathway, paving the way for innovative anti-tumor strategies by perturbing this dynamic and reversible modifying process.
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Affiliation(s)
- Heng Zhou
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, Shenyang, Liaoning 110001, China; Key Laboratory of Molecular Pathology and Epidemiology of Gastric Cancer in the Universities of Liaoning Province, Shenyang, Liaoning 110001, China
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning 110001, China
| | - Na Deng
- Department of Hematology, The Fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, China
| | - Yanshu Li
- Department of Cell Biology, Key Laboratory of Cell Biology, National Health Commission of the PRC and Key Laboratory of Medical Cell Biology, Ministry of Education of the PRC, China Medical University, Shenyang, Liaoning 110122, China
| | - Xiaoyun Hu
- Scientific Experimental Center, School of Pharmacy, China Medical University, Shenyang, Liaoning 110122, China
| | - Xue Yu
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, Shenyang, Liaoning 110001, China; Key Laboratory of Molecular Pathology and Epidemiology of Gastric Cancer in the Universities of Liaoning Province, Shenyang, Liaoning 110001, China
| | - Shiheng Jia
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, Shenyang, Liaoning 110001, China; Key Laboratory of Molecular Pathology and Epidemiology of Gastric Cancer in the Universities of Liaoning Province, Shenyang, Liaoning 110001, China
| | - Chen Zheng
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, Shenyang, Liaoning 110001, China; Key Laboratory of Molecular Pathology and Epidemiology of Gastric Cancer in the Universities of Liaoning Province, Shenyang, Liaoning 110001, China
- Department of Anesthesiology, The First Hospital of China Medical University, Shenyang, Liaoning 110001, China
| | - Shan Gao
- Department of Gynecology and Obstetrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110001, China
| | - Huizhe Wu
- Department of Pharmacology, School of Pharmacy, China Medical University, Shenyang, Liaoning 110122, China
- Liaoning Key Laboratory of Molecular Targeted Anti-Tumor Drug Development and Evaluation; Liaoning Cancer Immune Peptide Drug Engineering Technology Research Center; Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors, Ministry of Education; China Medical University, Shenyang, Liaoning 110122, China
- Shenyang Kangwei Medical Laboratory Analysis Co. LTD, Liaoning Province, China
| | - Kai Li
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, Shenyang, Liaoning 110001, China; Key Laboratory of Molecular Pathology and Epidemiology of Gastric Cancer in the Universities of Liaoning Province, Shenyang, Liaoning 110001, China
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3
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Zhu G, Tong N, Zhu Y, Wang L, Wang Q. The crosstalk between SUMOylation and immune system in host-pathogen interactions. Crit Rev Microbiol 2024:1-23. [PMID: 38619159 DOI: 10.1080/1040841x.2024.2339259] [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: 10/31/2023] [Accepted: 04/01/2024] [Indexed: 04/16/2024]
Abstract
Pathogens can not only cause infectious diseases, immune system diseases, and chronic diseases, but also serve as potential triggers or initiators for certain tumors. They directly or indirectly damage human health and are one of the leading causes of global deaths. Small ubiquitin-like modifier (SUMO) modification, a type of protein post-translational modification (PTM) that occurs when SUMO groups bond covalently to particular lysine residues on substrate proteins, plays a crucial role in both innate and adaptive immunologic responses, as well as pathogen-host immune system crosstalk. SUMOylation participates in the host's defense against pathogens by regulating immune responses, while numerically vast and taxonomically diverse pathogens have evolved to exploit the cellular SUMO modification system to break through innate defenses. Here, we describe the characteristics and multiple functions of SUMOylation as a pivotal PTM mechanism, the tactics employed by various pathogens to counteract the immune system through targeting host SUMOylation, and the character of the SUMOylation system in the fight between pathogens and the host immune system. We have also included a summary of the potential anti-pathogen SUMO enzyme inhibitors. This review serves as a reference for basic research and clinical practice in the diagnosis, prognosis, and treatment of pathogenic microorganism-caused disorders.
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Affiliation(s)
- Gangli Zhu
- Guangdong Province Solid Waste Recycling and Heavy Metal Pollution Control Engineering Technology Research Center, Guangdong Polytechnic of Environment Protection Engineering, Foshan, Guangdong, China
| | - Ni Tong
- Department of Molecular Biology, State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
- Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, Guangdong, China
| | - Yipeng Zhu
- Guagnzhou NO.6 Middle school, Guangzhou, Guangdong, China
| | - Lize Wang
- General Department, Institute of Software Chinese Academy of Sciences, Beijing, China
| | - Qirui Wang
- Department of Molecular Biology, State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
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4
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Katsin M, Dormeshkin D, Meleshko A, Migas A, Dubovik S, Konoplya N. CAR-T Cell Therapy for Classical Hodgkin Lymphoma. Hemasphere 2023; 7:e971. [PMID: 38026793 PMCID: PMC10656097 DOI: 10.1097/hs9.0000000000000971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 09/12/2023] [Indexed: 12/01/2023] Open
Abstract
Classical Hodgkin lymphoma (cHL) is a malignancy characterized by the presence of Hodgkin and Reed-Sternberg (HRS) cells within a complex tumor microenvironment (TME). Despite advances in conventional therapies, a subset of cHL patients experience relapse or refractory disease, necessitating the exploration of novel treatment strategies. Chimeric antigen receptor T cell (CAR-T cell) therapy has emerged as a promising approach for the management of cHL, harnessing the power of genetically modified T cells to recognize and eliminate tumor cells. In this article, we provide an overview of the pathogenesis of cHL, highlighting the key molecular and cellular mechanisms involved. Additionally, we discuss the rationale for the development of CAR-T cell therapy in cHL, focusing on the identification of suitable targets on HRS cells (such as CD30, CD123, LMP1, and LMP2A), clonotypic lymphoma initiating B cells (CD19, CD20), and cells within the TME (CD123, CD19, CD20) for CAR-T cell design. Furthermore, we explore various strategies employed to enhance the efficacy and safety of CAR-T cell therapies in the treatment of cHL. Finally, we present an overview of the results obtained from clinical trials evaluating the efficacy of CAR-T cell therapies in cHL, highlighting their potential as a promising therapeutic option. Collectively, this article provides a comprehensive review of the current understanding of cHL pathogenesis and the rationale for CAR-T cell therapy development, offering insights into the future directions of this rapidly evolving field.
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Affiliation(s)
- Mikalai Katsin
- Vitebsk Regional Clinical Cancer Centre, Vitebsk, Belarus
| | - Dmitri Dormeshkin
- Institute of Bioorganic Chemistry of the National academy of Sciences of Belarus, Minsk, Belarus
| | - Alexander Meleshko
- Belarusian Research Center for Pediatric Oncology and Hematology, Minsk, Belarus
| | | | - Simon Dubovik
- Institute of Bioorganic Chemistry of the National academy of Sciences of Belarus, Minsk, Belarus
| | - Natalya Konoplya
- N.N. Alexandrov National Cancer Center of Belarus, Minsk, Belarus
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5
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De La Cruz-Herrera CF, Tatham MH, Siddiqi UZ, Shire K, Marcon E, Greenblatt JF, Hay RT, Frappier L. Changes in SUMO-modified proteins in Epstein-Barr virus infection identifies reciprocal regulation of TRIM24/28/33 complexes and the lytic switch BZLF1. PLoS Pathog 2023; 19:e1011477. [PMID: 37410772 DOI: 10.1371/journal.ppat.1011477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 06/12/2023] [Indexed: 07/08/2023] Open
Abstract
SUMO modifications regulate the function of many proteins and are important in controlling herpesvirus infections. We performed a site-specific proteomic analysis of SUMO1- and SUMO2-modified proteins in Epstein-Barr virus (EBV) latent and lytic infection to identify proteins that change in SUMO modification status in response to EBV reactivation. Major changes were identified in all three components of the TRIM24/TRIM28/TRIM33 complex, with TRIM24 being rapidly degraded and TRIM33 being phosphorylated and SUMOylated in response to EBV lytic infection. Further experiments revealed TRIM24 and TRIM33 repress expression of the EBV BZLF1 lytic switch gene, suppressing EBV reactivation. However, BZLF1 was shown to interact with TRIM24 and TRIM33, resulting in disruption of TRIM24/TRIM28/TRIM33 complexes, degradation of TRIM24 and modification followed by degradation of TRIM33. Therefore, we have identified TRIM24 and TRIM33 as cellular antiviral defence factors against EBV lytic infection and established the mechanism by which BZLF1 disables this defence.
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Affiliation(s)
| | - Michael H Tatham
- Division of Gene Regulation and Expression, School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | - Umama Z Siddiqi
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Kathy Shire
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Edyta Marcon
- Donnelly Centre, University of Toronto, Toronto, Canada
| | - Jack F Greenblatt
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
- Donnelly Centre, University of Toronto, Toronto, Canada
| | - Ronald T Hay
- Division of Gene Regulation and Expression, School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | - Lori Frappier
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
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6
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Santos ERCD, Silva MSDME, Canedo NHS, Gaui MDFD, Britto ÁLVLD, Silva WMVD, Carvalho MDGDC, Bravo Neto GP. Epstein-Barr virus in gastric cancer and association with 30 bp del-latent membrane protein 1 polymorphism. REVISTA DA ASSOCIACAO MEDICA BRASILEIRA (1992) 2023; 69:e20221571. [PMID: 37222327 DOI: 10.1590/1806-9282.20221571] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 02/22/2023] [Indexed: 05/25/2023]
Abstract
OBJECTIVE This study aimed to determine the frequencies of Epstein-Barr virus, types 1 and 2 infection, and 30 bp del-latent membrane protein 1 viral polymorphism in gastric adenocarcinomas, as well as to investigate the association between Epstein-Barr virus infection and tumor location, type, and the patient's sex. METHODS Samples were collected from 38 patients treated at a university hospital in Rio de Janeiro, Brazil. Epstein-Barr virus detection and genotyping were performed by polymerase chain reaction, followed by polyacrylamide gel electrophoresis and staining by the silver nitrate method. RESULTS Overall, 68.4% of patients had Epstein-Barr virus-positive tumors. Of these, 65.4% presented infection by Epstein-Barr virus type 1, 23.1% by Epstein-Barr virus type 2, and 11.5% had coinfection with types 1 and 2. The 30 bp del-latent membrane protein 1 polymorphism was found in 42.3% of Epstein-Barr virus-positive tumors, 23.1% had the wild-type virus, and 23.1% had the wild-type and the polymorphism concomitantly. In 11.5% of Epstein-Barr virus-positive tumors, it was impossible to determine whether there was polymorphism or not. Tumor location in the antrum (22 of 38) and diffuse type (27 of 38) were predominant. There was no significant difference in Epstein-Barr virus infection or the 30 bp del-latent membrane protein 1 polymorphism between men and women. CONCLUSION Epstein-Barr virus infection was found in 68.4% of tumors investigated in this study. To the best of our knowledge, this is the first article showing the coinfection of Epstein-Barr virus types 1 and 2 in gastric carcinoma in Brazil.
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Affiliation(s)
| | | | - Nathalie Henriques Silva Canedo
- Universidade Federal do Rio de Janeiro, Hospital Universitário Clementino Fraga Filho, Medical School, Pathology Department - Rio de Janeiro (RJ), Brazil
| | - Maria de Fatima Dias Gaui
- Universidade Federal do Rio de Janeiro, Faculdade de Medicina, Departamento de Clinica Médica - Rio de Janeiro (RJ), Brazil
| | | | - William Marco Vicente da Silva
- Oswaldo Cruz Foundation, Centro de Referência Professor Hélio Fraga, Escola Nacional de Saúde Pública, National Reference Laboratory for Tuberculosis - Rio de Janeiro (RJ), Brazil
| | | | - Guilherme Pinto Bravo Neto
- Universidade Federal do Rio de Janeiro, Faculdade de Medicina, Departamento de Cirurgia - Rio de Janeiro (RJ), Brazil
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7
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Ortega-Hernandez OD, Martínez-Cáceres EM, Presas-Rodríguez S, Ramo-Tello C. Epstein-Barr Virus and Multiple Sclerosis: A Convoluted Interaction and the Opportunity to Unravel Predictive Biomarkers. Int J Mol Sci 2023; 24:ijms24087407. [PMID: 37108566 PMCID: PMC10138841 DOI: 10.3390/ijms24087407] [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: 01/14/2023] [Revised: 04/06/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Since the early 1980s, Epstein-Barr virus (EBV) infection has been described as one of the main risk factors for developing multiple sclerosis (MS), and recently, new epidemiological evidence has reinforced this premise. EBV seroconversion precedes almost 99% of the new cases of MS and likely predates the first clinical symptoms. The molecular mechanisms of this association are complex and may involve different immunological routes, perhaps all running in parallel (i.e., molecular mimicry, the bystander damage theory, abnormal cytokine networks, and coinfection of EBV with retroviruses, among others). However, despite the large amount of evidence available on these topics, the ultimate role of EBV in the pathogenesis of MS is not fully understood. For instance, it is unclear why after EBV infection some individuals develop MS while others evolve to lymphoproliferative disorders or systemic autoimmune diseases. In this regard, recent studies suggest that the virus may exert epigenetic control over MS susceptibility genes by means of specific virulence factors. Such genetic manipulation has been described in virally-infected memory B cells from patients with MS and are thought to be the main source of autoreactive immune responses. Yet, the role of EBV infection in the natural history of MS and in the initiation of neurodegeneration is even less clear. In this narrative review, we will discuss the available evidence on these topics and the possibility of harnessing such immunological alterations to uncover predictive biomarkers for the onset of MS and perhaps facilitate prognostication of the clinical course.
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Affiliation(s)
- Oscar-Danilo Ortega-Hernandez
- Multiple Sclerosis Unit, Department of Neurosciences, Hospital Universitari Germans Trias i Pujol-IGTP, 08916 Badalona, Spain
| | - Eva M Martínez-Cáceres
- Department of Immunology, Hospital Universitari Germans Trias i Pujol-IGTP, Universitat Autònoma de Barcelona, 08916 Badalona, Spain
| | - Silvia Presas-Rodríguez
- Multiple Sclerosis Unit, Department of Neurosciences, Hospital Universitari Germans Trias i Pujol-IGTP, 08916 Badalona, Spain
| | - Cristina Ramo-Tello
- Multiple Sclerosis Unit, Department of Neurosciences, Hospital Universitari Germans Trias i Pujol-IGTP, 08916 Badalona, Spain
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8
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Functional diversity: update of the posttranslational modification of Epstein-Barr virus coding proteins. Cell Mol Life Sci 2022; 79:590. [PMID: 36376593 DOI: 10.1007/s00018-022-04561-2] [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: 06/10/2022] [Revised: 08/26/2022] [Accepted: 09/14/2022] [Indexed: 11/16/2022]
Abstract
Epstein-Barr virus (EBV), a human oncogenic herpesvirus with a typical life cycle consisting of latent phase and lytic phase, is associated with many human diseases. EBV can express a variety of proteins that enable the virus to affect host cell processes and evade host immunity. Additionally, these proteins provide a basis for the maintenance of viral infection, contribute to the formation of tumors, and influence the occurrence and development of related diseases. Posttranslational modifications (PTMs) are chemical modifications of proteins after translation and are very important to guarantee the proper biological functions of these proteins. Studies in the past have intensely investigated PTMs of EBV-encoded proteins. EBV regulates the progression of the latent phase and lytic phase by affecting the PTMs of its encoded proteins, which are critical for the development of EBV-associated human diseases. In this review, we summarize the PTMs of EBV-encoded proteins that have been discovered and studied thus far with focus on their effects on the viral life cycle.
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9
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Marhelava K, Krawczyk M, Firczuk M, Fidyt K. CAR-T Cells Shoot for New Targets: Novel Approaches to Boost Adoptive Cell Therapy for B Cell-Derived Malignancies. Cells 2022; 11:1804. [PMID: 35681499 PMCID: PMC9180412 DOI: 10.3390/cells11111804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 05/27/2022] [Indexed: 12/10/2022] Open
Abstract
Chimeric antigen receptor (CAR)-T cell therapy is undeniably a promising tool in combating various types of hematological malignancies. However, it is not yet optimal and a significant number of patients experience a lack of response or relapse after the treatment. Therapy improvement requires careful analysis of the occurring problems and a deeper understanding of the reasons that stand behind them. In this review, we summarize the recent knowledge about CAR-T products' clinical performance and discuss diversified approaches taken to improve the major shortcomings of this therapy. Especially, we prioritize the challenges faced by CD19 CAR-T cell-based treatment of B cell-derived malignancies and revise the latest insights about mechanisms mediating therapy resistance. Since the loss of CD19 is one of the major obstacles to the success of CAR-T cell therapy, we present antigens that could be alternatively used for the treatment of various types of B cell-derived cancers.
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Affiliation(s)
- Katsiaryna Marhelava
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland; (K.M.); (M.K.); (M.F.)
| | - Marta Krawczyk
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland; (K.M.); (M.K.); (M.F.)
- Laboratory of Immunology, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland
- Doctoral School of Translational Medicine, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Malgorzata Firczuk
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland; (K.M.); (M.K.); (M.F.)
- Laboratory of Immunology, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Klaudyna Fidyt
- Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland; (K.M.); (M.K.); (M.F.)
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10
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Fan Y, Li X, Zhang L, Zong Z, Wang F, Huang J, Zeng L, Zhang C, Yan H, Zhang L, Zhou F. SUMOylation in Viral Replication and Antiviral Defense. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2104126. [PMID: 35060688 PMCID: PMC8895153 DOI: 10.1002/advs.202104126] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 12/07/2021] [Indexed: 05/22/2023]
Abstract
SUMOylation is a ubiquitination-like post-translational modification that plays an essential role in the regulation of protein function. Recent studies have shown that proteins from both RNA and DNA virus families can be modified by SUMO conjugation, which facilitates viral replication. Viruses can manipulate the entire process of SUMOylation through interplay with the SUMO pathway. By contrast, SUMOylation can eliminate viral infection by regulating host antiviral immune components. A deeper understanding of how SUMOylation regulates viral proteins and cellular antiviral components is necessary for the development of effective antiviral therapies. In the present review, the regulatory mechanism of SUMOylation in viral replication and infection and the antiviral immune response, and the consequences of this regulation for viral replication and engagement with antiviral innate immunity are summarized. The potential therapeutic applications of SUMOylation in diseases caused by viruses are also discussed.
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Affiliation(s)
- Yao Fan
- Department of PharmacologyZhejiang University City College School of MedicineHangzhouZhejiang310015China
- Institutes of Biology and Medical ScienceSoochow UniversitySuzhou215123China
| | - Xiang Li
- MOE Laboratory of Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling NetworkLife Sciences InstituteZhejiang UniversityHangzhou310058China
| | - Lei Zhang
- Department of Orthopaedic SurgeryThe Third Affiliated Hospital of Wenzhou Medical UniversityRui'an325200China
| | - Zhi Zong
- MOE Laboratory of Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling NetworkLife Sciences InstituteZhejiang UniversityHangzhou310058China
| | - Fangwei Wang
- MOE Laboratory of Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling NetworkLife Sciences InstituteZhejiang UniversityHangzhou310058China
| | - Jun Huang
- MOE Laboratory of Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling NetworkLife Sciences InstituteZhejiang UniversityHangzhou310058China
| | - Linghui Zeng
- Department of PharmacologyZhejiang University City College School of MedicineHangzhouZhejiang310015China
| | - Chong Zhang
- Department of PharmacologyZhejiang University City College School of MedicineHangzhouZhejiang310015China
| | - Haiyan Yan
- Department of PharmacologyZhejiang University City College School of MedicineHangzhouZhejiang310015China
| | - Long Zhang
- MOE Laboratory of Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling NetworkLife Sciences InstituteZhejiang UniversityHangzhou310058China
| | - Fangfang Zhou
- Institutes of Biology and Medical ScienceSoochow UniversitySuzhou215123China
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11
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Epstein-Barr Virus BGLF2 commandeers RISC to interfere with cellular miRNA function. PLoS Pathog 2022; 18:e1010235. [PMID: 35007297 PMCID: PMC8782528 DOI: 10.1371/journal.ppat.1010235] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 01/21/2022] [Accepted: 12/27/2021] [Indexed: 01/27/2023] Open
Abstract
The Epstein-Barr virus (EBV) BGLF2 protein is a tegument protein with multiple effects on the cellular environment, including induction of SUMOylation of cellular proteins. Using affinity-purification coupled to mass-spectrometry, we identified the miRNA-Induced Silencing Complex (RISC), essential for miRNA function, as a top interactor of BGLF2. We confirmed BGLF2 interaction with the Ago2 and TNRC6 components of RISC in multiple cell lines and their co-localization in cytoplasmic bodies that also contain the stress granule marker G3BP1. In addition, BGLF2 expression led to the loss of processing bodies in multiple cell types, suggesting disruption of RISC function in mRNA regulation. Consistent with this observation, BGLF2 disrupted Ago2 association with multiple miRNAs. Using let-7 miRNAs as a model, we tested the hypothesis that BGLF2 interfered with the function of RISC in miRNA-mediated mRNA silencing. Using multiple reporter constructs with 3’UTRs containing let-7a regulated sites, we showed that BGLF2 inhibited let-7a miRNA activity dependent on these 3’UTRs, including those from SUMO transcripts which are known to be regulated by let-7 miRNAs. In keeping with these results, we showed that BGLF2 increased the cellular level of unconjugated SUMO proteins without affecting the level of SUMO transcripts. Such an increase in free SUMO is known to drive SUMOylation and would account for the effect of BGLF2 in inducing SUMOylation. We further showed that BGLF2 expression inhibited the loading of let-7 miRNAs into Ago2 proteins, and conversely, that lytic infection with EBV lacking BGLF2 resulted in increased interaction of let-7a and SUMO transcripts with Ago2, relative to WT EBV infection. Therefore, we have identified a novel role for BGLF2 as a miRNA regulator and shown that one outcome of this activity is the dysregulation of SUMO transcripts that leads to increased levels of free SUMO proteins and SUMOylation. Epstein-Barr virus (EBV) infects most people worldwide, persists for life and is associated with several kinds of cancer. In order to undergo efficient lytic infection, EBV must manipulate multiple cellular pathways. BGLF2 is an EBV lytic protein known to modulate several cellular processes including increasing the modification of cellular proteins with the Small Ubiquitin-Like Modifier (SUMO), a process referred to as SUMOylation. Here we show for the first time that BGLF2 interacts with a cellular complex (RISC) required for miRNA function and interferes with the function of some cellular miRNAs by sequestering this complex. One of the consequences of this effect is the increased expression of SUMO proteins, due to inhibition of the miRNAs that normally downregulate their expression. The resulting increase in SUMO proteins drives SUMOylation, providing a mechanism for the previously reported BGLF2-induced SUMOylation of cellular proteins. In addition, the discovery of BGLF2 as a miRNA regulator suggests that this EBV protein can control many cellular pathways by interfering with cellular miRNAs that normally regulate them.
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12
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Mihelson N, McGavern DB. Viral Control of Glioblastoma. Viruses 2021; 13:v13071264. [PMID: 34209584 PMCID: PMC8310222 DOI: 10.3390/v13071264] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 12/11/2022] Open
Abstract
Glioblastoma multiforme (GBM) is a universally lethal cancer of the central nervous system. Patients with GBM have a median survival of 14 months and a 5-year survival of less than 5%, a grim statistic that has remained unchanged over the last 50 years. GBM is intransigent for a variety of reasons. The immune system has a difficult time mounting a response against glioblastomas because they reside in the brain (an immunologically dampened compartment) and generate few neoantigens relative to other cancers. Glioblastomas inhabit the brain like sand in the grass and display a high degree of intra- and inter-tumoral heterogeneity, impeding efforts to therapeutically target a single pathway. Of all potential therapeutic strategies to date, virotherapy offers the greatest chance of counteracting each of the obstacles mounted by GBM. Virotherapy can xenogenize a tumor that is deft at behaving like “self”, triggering adaptive immune recognition in an otherwise immunologically quiet compartment. Viruses can also directly lyse tumor cells, creating damage and further stimulating secondary immune reactions that are detrimental to tumor growth. In this review, we summarize the basic immune mechanisms underpinning GBM immune evasion and the recent successes achieved using virotherapies.
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Dunphy K, Dowling P, Bazou D, O’Gorman P. Current Methods of Post-Translational Modification Analysis and Their Applications in Blood Cancers. Cancers (Basel) 2021; 13:1930. [PMID: 33923680 PMCID: PMC8072572 DOI: 10.3390/cancers13081930] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/04/2021] [Accepted: 04/14/2021] [Indexed: 12/12/2022] Open
Abstract
Post-translational modifications (PTMs) add a layer of complexity to the proteome through the addition of biochemical moieties to specific residues of proteins, altering their structure, function and/or localization. Mass spectrometry (MS)-based techniques are at the forefront of PTM analysis due to their ability to detect large numbers of modified proteins with a high level of sensitivity and specificity. The low stoichiometry of modified peptides means fractionation and enrichment techniques are often performed prior to MS to improve detection yields. Immuno-based techniques remain popular, with improvements in the quality of commercially available modification-specific antibodies facilitating the detection of modified proteins with high affinity. PTM-focused studies on blood cancers have provided information on altered cellular processes, including cell signaling, apoptosis and transcriptional regulation, that contribute to the malignant phenotype. Furthermore, the mechanism of action of many blood cancer therapies, such as kinase inhibitors, involves inhibiting or modulating protein modifications. Continued optimization of protocols and techniques for PTM analysis in blood cancer will undoubtedly lead to novel insights into mechanisms of malignant transformation, proliferation, and survival, in addition to the identification of novel biomarkers and therapeutic targets. This review discusses techniques used for PTM analysis and their applications in blood cancer research.
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Affiliation(s)
- Katie Dunphy
- Department of Biology, National University of Ireland, W23 F2K8 Maynooth, Ireland; (K.D.); (P.D.)
| | - Paul Dowling
- Department of Biology, National University of Ireland, W23 F2K8 Maynooth, Ireland; (K.D.); (P.D.)
| | - Despina Bazou
- Department of Haematology, Mater Misericordiae University Hospital, D07 WKW8 Dublin, Ireland;
| | - Peter O’Gorman
- Department of Haematology, Mater Misericordiae University Hospital, D07 WKW8 Dublin, Ireland;
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14
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Garcia P, Harrod A, Jha S, Jenkins J, Barnhill A, Lee H, Thompson M, Williams JP, Barefield J, Mckinnon A, Suarez P, Shah A, Lowrey AJ, Bentz GL. Effects of targeting sumoylation processes during latent and induced Epstein-Barr virus infections using the small molecule inhibitor ML-792. Antiviral Res 2021; 188:105038. [PMID: 33577806 DOI: 10.1016/j.antiviral.2021.105038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 02/02/2021] [Accepted: 02/05/2021] [Indexed: 12/12/2022]
Abstract
As the second leading cause of death in the United States, cancer has a considerable impact on society, and one cellular process that is commonly dysregulated in many cancers is the post-translational modification of proteins by the Small Ubiquitin-like Modifier (SUMO; sumoylation). We documented that sumoylation processes are up-regulated in lymphoma tissues in the presence of Latent Membrane Protein-1 (LMP1), the principal oncoprotein of Epstein-Barr virus (EBV). LMP1-mediated dysregulation of cellular sumoylation processes contributes to oncogenesis, modulates innate immune responses, and aids the maintenance of viral latency. Manipulation of protein sumoylation has been proposed for anti-cancer and anti-viral therapies; however, known inhibitors of sumoylation do not only target sumoylation processes. Recently, a specific and selective small-molecule inhibitor of sumoylation (ML-792) was identified; however, nothing is known about the effect of ML-792 on LMP1-mediated dysregulation of cellular sumoylation or the EBV life-cycle. We hypothesized that ML-792 modulates viral replication and the oncogenic potential of EBV LMP1 by inhibiting protein sumoylation. Results showed that ML-792 inhibited sumoylation processes in multiple EBV-positive B cell lines and EBV-positive nasopharyngeal carcinoma cell lines but not in their EBV-negative counterparts. Focusing on its effect on B cells, ML-792 inhibited B-cell growth and promoted cell death at very low doses. ML-792 also modulated LMP1-induced cell migration and cell adhesion, which suggests the abrogation of the oncogenic potential of LMP1. Finally, while higher concentrations of ML-792 were sufficient to induce low levels EBV spontaneous reactivation, they decreased the production of new infectious virus following an induced reactivation and the infection of new cells, suggesting that ML-792 has anti-viral potential. Together, these findings suggest that ML-792 may be a potential therapeutic drug to treat EBV-associated lymphoid malignancies by targeting oncogenesis and the EBV life-cycle.
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Affiliation(s)
- Peter Garcia
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Abigail Harrod
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Shruti Jha
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Jessica Jenkins
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Alex Barnhill
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Holden Lee
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Merritt Thompson
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | | | - James Barefield
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Ashton Mckinnon
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Persia Suarez
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Ananya Shah
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Angela J Lowrey
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA
| | - Gretchen L Bentz
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, GA, USA.
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Li S, Yin Y, Yao L, Lin Z, Sun S, Zhang J, Li X. TNF‑α treatment increases DKK1 protein levels in primary osteoblasts via upregulation of DKK1 mRNA levels and downregulation of miR‑335‑5p. Mol Med Rep 2020; 22:1017-1025. [PMID: 32468044 PMCID: PMC7339467 DOI: 10.3892/mmr.2020.11152] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 04/28/2020] [Indexed: 12/31/2022] Open
Abstract
Elucidation of the underlying mechanisms governing osteogenic differentiation is of significant importance to the improvement of therapeutics for bone-related inflammatory diseases. Tumor necrosis factor-α (TNF-α) is regarded as one of the major agents during osteogenic differentiation in an inflammatory environment. miR-335-5p post-transcriptionally downregulates the Dickkopf WNT signaling pathway inhibitor 1 (DKK1) protein level by specifically binding to the DKK1 3′UTR and activating Wnt signaling. The role of miR-335-5p in TNF-α-induced post-transcriptional regulation of DKK1 remains to be elucidated. In the present study, the mRNA and protein levels of DKK1 and the level of miR-335-5p were determined in MC3T3-E1 cells and the primary calvarial osteoblasts treated with or without TNF-α. The role of NF-κB signaling in TNF-α-induced post-transcriptional regulation of DKK1 was also evaluated. The present study determined that although TNF-α treatment exhibited cell-specific effects on DKK1 mRNA expression, the stimulation of TNF-α time- and concentration-dependently upregulated the protein levels of DKK1. In primary calvarial osteoblasts, the decreased miR-335-5p level induced by TNF-α-activated NF-κB signaling served an important role in mediating the post-transcriptional regulation of DKK1 by TNF-α treatment. In MC3T3-E1 cells, the post-transcriptional regulation of DKK1 by TNF-α treatment was more complicated and involved other molecular signaling pathways in addition to the NF-κB signaling. In conclusion, TNF-α treatment served an important role in the post-transcriptional regulation of DKK1 expression, which requires further investigation. The results of the present study not only provided new insights into the regulatory effects of miR-335-5p on osteogenic differentiation in an inflammatory microenvironment, but may also promote the development of potential therapeutic strategies for the treatment of bone-related inflammatory diseases.
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Affiliation(s)
- Shanshan Li
- Department of Endodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, P.R. China
| | - Yixin Yin
- Department of Endodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, P.R. China
| | - Liping Yao
- Department of Endodontics, Yantai Stomatological Hospital, Yantai, Shandong 264008, P.R. China
| | - Ziyi Lin
- Department of Endodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, P.R. China
| | - Shengjun Sun
- Department of Endodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, P.R. China
| | - Jin Zhang
- Department of Endodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, P.R. China
| | - Xiaoyan Li
- Department of Endodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, P.R. China
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16
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The Epstein-Barr Virus Oncoprotein, LMP1, Regulates the Function of SENP2, a SUMO-protease. Sci Rep 2019; 9:9523. [PMID: 31266997 PMCID: PMC6606635 DOI: 10.1038/s41598-019-45825-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 06/12/2019] [Indexed: 12/14/2022] Open
Abstract
Epstein-Barr virus (EBV) latent membrane protein-1 (LMP1) activates numerous signal transduction pathways using its C-terminal activating regions. We reported that LMP1 increased global levels of sumoylated proteins, which aided the oncogenic nature of LMP1. Because increased protein sumoylation is detected in numerous cancers, we wanted to elucidate additional mechanisms by which LMP1 modulates the sumoylation machinery. Results indicated that SUMO-protease activity decreased in a LMP1-dependent manner, so we hypothesized that LMP1 inhibits SUMO-protease activity, resulting in reduced de-sumoylation of cellular proteins, which contributes to the detected accumulation of sumoylated proteins in EBV-positive lymphomas. Focusing on SENP2, findings revealed that LMP1 expression corresponded with increased sumoylation of SENP2 at K48 and K447 in a CTAR-dependent manner. Interestingly, independent of LMP1-induced sumoylation of SENP2, LMP1 also decreased SENP2 activity, decreased SENP2 turnover, and altered the localization of SENP2, which led us to investigate if LMP1 regulated the biology of SENP2 by a different post-translational modification, specifically ubiquitination. Data showed that expression of LMP1 inhibited the ubiquitination of SENP2, and inhibition of ubiquitination was sufficient to mimic LMP1-induced changes in SENP2 activity and trafficking. Together, these findings suggest that LMP1 modulates different post-translational modifications of SENP2 in order to modulate its biology and identify a third member of the sumoylation machinery that is manipulated by LMP1 during latent EBV infections, which can affect oncogenesis.
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17
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Bentz GL, Lowrey AJ, Horne DC, Nguyen V, Satterfield AR, Ross TD, Harrod AE, Uchakina ON, McKallip RJ. Using glycyrrhizic acid to target sumoylation processes during Epstein-Barr virus latency. PLoS One 2019; 14:e0217578. [PMID: 31125383 PMCID: PMC6534330 DOI: 10.1371/journal.pone.0217578] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 05/14/2019] [Indexed: 12/24/2022] Open
Abstract
Cellular sumoylation processes are proposed targets for anti-viral and anti-cancer therapies. We reported that Epstein-Barr virus (EBV) latent membrane protein 1 (LMP1) dysregulates cellular sumoylation processes, contributing to its oncogenic potential in EBV-associated malignancies. Ginkgolic acid and anacardic acid, known inhibitors of sumoylation, inhibit LMP1-induced protein sumoylation; however, both drugs have adverse effects in hosts. Here we test the effects of glycyrrhizic acid, a medicinal botanical extract with anti-inflammatory, anti-carcinogenic, and anti-viral properties, on cellular sumoylation processes. While glycyrrhizic acid is known to inhibit EBV penetration, its affect on cellular sumoylation processes remains to be documented. We hypothesized that glycyrrhizic acid inhibits cellular sumoylation processes and may be a viable treatment for Epstein-Barr virus-associated malignancies. Results showed that glycyrrhizic acid inhibited sumoylation processes (without affecting ubiquitination processes), limited cell growth, and induced apoptosis in multiple cell lines. Similar to ginkgolic acid; glycyrrhizic acid targeted the first step of the sumoylation process and resulted in low levels of spontaneous EBV reactivation. Glycyrrhizic acid did not affect induced reactivation of the virus, but the presence of the extract did reduce the ability of the produced virus to infect additional cells. Therefore, we propose that glycyrrhizic acid may be a potential therapeutic drug to augment the treatment of EBV-associated lymphoid malignancies.
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Affiliation(s)
- Gretchen L Bentz
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Angela J Lowrey
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Dustin C Horne
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Vy Nguyen
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Austin R Satterfield
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Tabithia D Ross
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Abigail E Harrod
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Olga N Uchakina
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
| | - Robert J McKallip
- Division of Biomedical Sciences, Mercer University School of Medicine, Macon, Georgia, United States of America
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18
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Que Y, Xue J. Propofol activates autophagic activity of vascular endothelial cells by inhibiting SENP1 expression and attenuates vascular endothelial injury induced by ischemia-reperfusion in orthopedic surgery. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2019.1673208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- Yuanyuan Que
- Department of Anesthesiology, Guizhou Provincial People’s Hospital, Guiyang, Guizhou, People's Republic of China
| | - Jinpei Xue
- Department of Anesthesiology, Longgang Orthopedics Hospital of Shenzhen, Shenzhen, Guangdong, People's Republic of China
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