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Abou-Ghali M, Lallemand-Breitenbach V. PML Nuclear bodies: the cancer connection and beyond. Nucleus 2024; 15:2321265. [PMID: 38411156 PMCID: PMC10900273 DOI: 10.1080/19491034.2024.2321265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/16/2024] [Indexed: 02/28/2024] Open
Abstract
Promyelocytic leukemia (PML) nuclear bodies, membrane-less organelles in the nucleus, play a crucial role in cellular homeostasis. These dynamic structures result from the assembly of scaffolding PML proteins and various partners. Recent crystal structure analyses revealed essential self-interacting domains, while liquid-liquid phase separation contributes to their formation. PML bodies orchestrate post-translational modifications, particularly stress-induced SUMOylation, impacting target protein functions. Serving as hubs in multiple signaling pathways, they influence cellular processes like senescence. Dysregulation of PML expression contributes to diseases, including cancer, highlighting their significance. Therapeutically, PML bodies are promising targets, exemplified by successful acute promyelocytic leukemia treatment with arsenic trioxide and retinoic acid restoring PML bodies. Understanding their functions illuminates both normal and pathological cellular physiology, guiding potential therapies. This review explores recent advancements in PML body biogenesis, biochemical activity, and their evolving biological roles.
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Affiliation(s)
- Majdouline Abou-Ghali
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université 11 PSL, Paris, France
- Saint-Louis Research Institute, Paris, France
| | - Valérie Lallemand-Breitenbach
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université 11 PSL, Paris, France
- Saint-Louis Research Institute, Paris, France
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2
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Berkholz J, Karle W. Unravelling the molecular interplay: SUMOylation, PML nuclear bodies and vascular cell activity in health and disease. Cell Signal 2024; 119:111156. [PMID: 38574938 DOI: 10.1016/j.cellsig.2024.111156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 03/23/2024] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
In the seemingly well-researched field of vascular research, there are still many underestimated factors and molecular mechanisms. In recent years, SUMOylation has become increasingly important. SUMOylation is a post-translational modification in which small ubiquitin-related modifiers (SUMO) are covalently attached to target proteins. Sites where these SUMO modification processes take place in the cell nucleus are PML nuclear bodies (PML-NBs) - multiprotein complexes with their essential main component and organizer, the PML protein. PML and SUMO, either alone or as partners, influence a variety of cellular processes, including regulation of transcription, senescence, DNA damage response and defence against microorganisms, and are involved in innate immunity and inflammatory responses. They also play an important role in maintaining homeostasis in the vascular system and in pathological processes leading to the development and progression of cardiovascular diseases. This review summarizes information about the function of SUMO(ylation) and PML(-NBs) in the human vasculature from angiogenesis to disease and highlights their clinical potential as drug targets.
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Affiliation(s)
- Janine Berkholz
- Institute of Physiology, Charité - Universitätsmedizin, Berlin, Germany; DZHK (German Centre for Cardiovascular Research), partner site Berlin, Germany.
| | - Weronika Karle
- Institute of Physiology, Charité - Universitätsmedizin, Berlin, Germany
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3
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Pai CP, Wang H, Seachrist DD, Agarwal N, Adams JA, Liu Z, Keri RA, Cao K, Schiemann WP, Kao HY. The PML1-WDR5 axis regulates H3K4me3 marks and promotes stemness of estrogen receptor-positive breast cancer. Cell Death Differ 2024; 31:768-778. [PMID: 38627584 PMCID: PMC11164886 DOI: 10.1038/s41418-024-01294-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 03/27/2024] [Accepted: 04/03/2024] [Indexed: 04/30/2024] Open
Abstract
The alternative splicing of PML precursor mRNA gives rise to various PML isoforms, yet their expression profile in breast cancer cells remains uncharted. We discovered that PML1 is the most abundant isoform in all breast cancer subtypes, and its expression is associated with unfavorable prognosis in estrogen receptor-positive (ER+) breast cancers. PML depletion reduces cell proliferation, invasion, and stemness, while heterologous PML1 expression augments these processes and fuels tumor growth and resistance to fulvestrant, an FDA-approved drug for ER+ breast cancer, in a mouse model. Moreover, PML1, rather than the well-known tumor suppressor isoform PML4, rescues the proliferation of PML knockdown cells. ChIP-seq analysis reveals significant overlap between PML-, ER-, and Myc-bound promoters, suggesting their coordinated regulation of target gene expression, including genes involved in breast cancer stem cells (BCSCs), such as JAG1, KLF4, YAP1, SNAI1, and MYC. Loss of PML reduces BCSC-related gene expression, and exogenous PML1 expression elevates their expression. Consistently, PML1 restores the association of PML with these promoters in PML-depleted cells. We identified a novel association between PML1 and WDR5, a key component of H3K4 methyltransferase (HMTs) complexes that catalyze H3K4me1 and H3K4me3. ChIP-seq analyses showed that the loss of PML1 reduces H3K4me3 in numerous loci, including BCSC-associated gene promoters. Additionally, PML1, not PML4, re-establishes the H3K4me3 mark on these promoters in PML-depleted cells. Significantly, PML1 is essential for recruiting WDR5, MLL1, and MLL2 to these gene promoters. Inactivating WDR5 by knockdown or inhibitors phenocopies the effects of PML1 loss, reducing BCSC-related gene expression and tumorsphere formation and enhancing fulvestrant's anticancer activity. Our findings challenge the conventional understanding of PML as a tumor suppressor, redefine its role as a promoter of tumor growth in breast cancer, and offer new insights into the unique roles of PML isoforms in breast cancer.
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Affiliation(s)
- Chun-Peng Pai
- Departments of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Han Wang
- Departments of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Darcie D Seachrist
- Department of Cancer Biology, Cleveland Clinic Lerner Research Institute, Cleveland, OH, 44195, USA
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Neel Agarwal
- Departments of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Joshua A Adams
- Departments of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Zhenghao Liu
- Departments of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Ruth A Keri
- Department of Cancer Biology, Cleveland Clinic Lerner Research Institute, Cleveland, OH, 44195, USA
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, 44106, USA
- Departments of Molecular Medicine, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Kaixiang Cao
- Departments of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - William P Schiemann
- Departments of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Hung-Ying Kao
- Departments of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA.
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, 44106, USA.
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Sahu M, Rani N, Kumar P. Simulation and Computational Study of RING Domain Mutants of BRCA1 and Ube2k in AD/PD Pathophysiology. Mol Biotechnol 2024; 66:1095-1115. [PMID: 38172369 DOI: 10.1007/s12033-023-01006-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 11/27/2023] [Indexed: 01/05/2024]
Abstract
Lysine-based post-translational modification (PTM) such as acylation, acetylation, deamination, methylation, SUMOylation, and ubiquitination has proven to be a major regulator of gene expression, chromatin structure, protein stability, protein-protein interaction, protein degradation, and cellular localization. However, besides all the PTMs, ubiquitination stands as the second most common PTM after phosphorylation that is involved in the etiology of neurodegenerative diseases (NDDs) namely, Alzheimer's disease (AD) and Parkinson's disease (PD). NDDs are characterized by the accumulation of misfolded protein aggregates in the brain that lead to disease-related gene mutation and irregular protein homeostasis. The ubiquitin-proteasome system (UPS) is in charge of degrading these misfolded proteins, which involve an interplay of E1, E2, E3, and deubiquitinase enzymes. Impaired UPS has been commonly observed in NDDs and E3 ligases are the key members of the UPS, thus, dysfunction of the same can accelerate the neurodegeneration process. Therefore, the aim of this study is firstly, to find E3 ligases that are common in both AD and PD through data mining. Secondly, to study the impact of mutation on its structure and function. The study deciphered 74 E3 ligases that were common in both AD and PD. Later, 10 hub genes were calculated of which protein-protein interaction, pathway enrichment, lysine site prediction, domain, and motif analysis were performed. The results predicted BRCA1, PML, and TRIM33 as the top three putative lysine-modified E3 ligases involved in AD and PD pathogenesis. However, based on structural characterization, BRCA1 was taken further to study RING domain mutation that inferred K32Y, K32L, K32C, K45V, K45Y, and K45G as potential mutants that alter the structural and functional ability of BRCA1 to interact with Ube2k, E2-conjugating enzyme. The most probable mutant observed after molecular dynamics simulation of 50 ns is K32L. Therefore, our study concludes BRCA1, a potential E3 ligase common in AD and PD, and RING domain mutation at sites K32 and K45 possibly disturbs its interaction with its E2, Ube2k.
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Affiliation(s)
- Mehar Sahu
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University (Formerly Delhi College of Engineering), Shahbad Daulatpur, Bawana Road, Delhi, 110042, India
| | - Neetu Rani
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University (Formerly Delhi College of Engineering), Shahbad Daulatpur, Bawana Road, Delhi, 110042, India
| | - Pravir Kumar
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University (Formerly Delhi College of Engineering), Shahbad Daulatpur, Bawana Road, Delhi, 110042, India.
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Xiao C, Wu X, Gallagher CS, Rasooly D, Jiang X, Morton CC. Genetic contribution of reproductive traits to risk of uterine leiomyomata: a large-scale, genome-wide, cross-trait analysis. Am J Obstet Gynecol 2024; 230:438.e1-438.e15. [PMID: 38191017 DOI: 10.1016/j.ajog.2023.12.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 12/03/2023] [Accepted: 12/26/2023] [Indexed: 01/10/2024]
Abstract
BACKGROUND Although phenotypic associations between female reproductive characteristics and uterine leiomyomata have long been observed in epidemiologic investigations, the shared genetic architecture underlying these complex phenotypes remains unclear. OBJECTIVE We aimed to investigate the shared genetic basis, pleiotropic effects, and potential causal relationships underlying reproductive traits (age at menarche, age at natural menopause, and age at first birth) and uterine leiomyomata. STUDY DESIGN With the use of large-scale, genome-wide association studies conducted among women of European ancestry for age at menarche (n=329,345), age at natural menopause (n=201,323), age at first birth (n=418,758), and uterine leiomyomata (ncases/ncontrols=35,474/267,505), we performed a comprehensive, genome-wide, cross-trait analysis to examine systematically the common genetic influences between reproductive traits and uterine leiomyomata. RESULTS Significant global genetic correlations were identified between uterine leiomyomata and age at menarche (rg, -0.17; P=3.65×10-10), age at natural menopause (rg, 0.23; P=3.26×10-07), and age at first birth (rg, -0.16; P=1.96×10-06). Thirteen genomic regions were further revealed as contributing significant local correlations (P<.05/2353) to age at natural menopause and uterine leiomyomata. A cross-trait meta-analysis identified 23 shared loci, 3 of which were novel. A transcriptome-wide association study found 15 shared genes that target tissues of the digestive, exo- or endocrine, nervous, and cardiovascular systems. Mendelian randomization suggested causal relationships between a genetically predicted older age at menarche (odds ratio, 0.88; 95% confidence interval, 0.85-0.92; P=1.50×10-10) or older age at first birth (odds ratio, 0.95; 95% confidence interval, 0.90-0.99; P=.02) and a reduced risk for uterine leiomyomata and between a genetically predicted older age at natural menopause and an increased risk for uterine leiomyomata (odds ratio, 1.08; 95% confidence interval, 1.06-1.09; P=2.30×10-27). No causal association in the reverse direction was found. CONCLUSION Our work highlights that there are substantial shared genetic influences and putative causal links that underlie reproductive traits and uterine leiomyomata. The findings suggest that early identification of female reproductive risk factors may facilitate the initiation of strategies to modify potential uterine leiomyomata risk.
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Affiliation(s)
- Changfeng Xiao
- Department of Epidemiology and Biostatistics, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xueyao Wu
- Department of Epidemiology and Biostatistics, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan, China
| | | | - Danielle Rasooly
- Division of Aging, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Xia Jiang
- Department of Epidemiology and Biostatistics, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan, China; Department of Nutrition and Food Hygiene, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China; Department of Clinical Neuroscience, Center for Molecular Medicine, Karolinska Institutet, Solna, Stockholm, Sweden.
| | - Cynthia Casson Morton
- Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Broad Institute of MIT and Harvard, Cambridge, MA; Manchester Centre for Audiology and Deafness, Manchester Academic Health Science Center, University of Manchester, Manchester, United Kingdom.
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Bercier P, de Thé H. History of Developing Acute Promyelocytic Leukemia Treatment and Role of Promyelocytic Leukemia Bodies. Cancers (Basel) 2024; 16:1351. [PMID: 38611029 PMCID: PMC11011038 DOI: 10.3390/cancers16071351] [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: 03/04/2024] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
The story of acute promyelocytic leukemia (APL) discovery, physiopathology, and treatment is a unique journey, transforming the most aggressive form of leukemia to the most curable. It followed an empirical route fueled by clinical breakthroughs driving major advances in biochemistry and cell biology, including the discovery of PML nuclear bodies (PML NBs) and their central role in APL physiopathology. Beyond APL, PML NBs have emerged as key players in a wide variety of biological functions, including tumor-suppression and SUMO-initiated protein degradation, underscoring their broad importance. The APL story is an example of how clinical observations led to the incremental development of the first targeted leukemia therapy. The understanding of APL pathogenesis and the basis for cure now opens new insights in the treatment of other diseases, especially other acute myeloid leukemias.
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Affiliation(s)
- Pierre Bercier
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, 75231 Paris, France;
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, 75010 Paris, France
| | - Hugues de Thé
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, 75231 Paris, France;
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, 75010 Paris, France
- Hematology Laboratory, Hôpital St Louis, AP/HP, 75010 Paris, France
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7
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Kowald L, Roedig J, Karlowitz R, Wagner K, Smith S, Juretschke T, Beli P, Müller S, van Wijk SJL. USP22 regulates APL differentiation via PML-RARα stabilization and IFN repression. Cell Death Discov 2024; 10:128. [PMID: 38467608 PMCID: PMC10928094 DOI: 10.1038/s41420-024-01894-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/23/2024] [Accepted: 02/27/2024] [Indexed: 03/13/2024] Open
Abstract
Ubiquitin-specific peptidase 22 (USP22) is a deubiquitinating enzyme (DUB) that underlies tumorigenicity, proliferation, cell death and differentiation through deubiquitination of histone and non-histone targets. Ubiquitination determines stability, localization and functions of cell fate proteins and controls cell-protective signaling pathways to surveil cell cycle progression. In a variety of carcinomas, lymphomas and leukemias, ubiquitination regulates the tumor-suppressive functions of the promyelocytic leukemia protein (PML), but PML-specific DUBs, DUB-controlled PML ubiquitin sites and the functional consequences of PML (de)ubiquitination remain unclear. Here, we identify USP22 as regulator of PML and the oncogenic acute promyelocytic leukemia (APL) fusion PML-RARα protein stability and identify a destabilizing role of PML residue K394. Additionally, loss of USP22 upregulates interferon (IFN) and IFN-stimulated gene (ISG) expression in APL and induces PML-RARα stabilization and a potentiation of the cell-autonomous sensitivity towards all-trans retinoic acid (ATRA)-mediated differentiation. Our findings imply USP22-dependent surveillance of PML-RARα stability and IFN signaling as important regulator of APL pathogenesis, with implications for viral mimicry, differentiation and cell fate regulation in other leukemia subtypes.
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Affiliation(s)
- Lisa Kowald
- Institute for Experimental Pediatric Hematology and Oncology, Medical Faculty, Goethe-University Frankfurt, Komturstrasse 3a, 60528, Frankfurt am Main, Germany
| | - Jens Roedig
- Institute for Experimental Pediatric Hematology and Oncology, Medical Faculty, Goethe-University Frankfurt, Komturstrasse 3a, 60528, Frankfurt am Main, Germany
| | - Rebekka Karlowitz
- Institute for Experimental Pediatric Hematology and Oncology, Medical Faculty, Goethe-University Frankfurt, Komturstrasse 3a, 60528, Frankfurt am Main, Germany
| | - Kristina Wagner
- Institute of Biochemistry II (IBCII), Medical Faculty, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Sonja Smith
- Institute for Experimental Pediatric Hematology and Oncology, Medical Faculty, Goethe-University Frankfurt, Komturstrasse 3a, 60528, Frankfurt am Main, Germany
| | - Thomas Juretschke
- Institute of Molecular Biology (IMB), Ackermannweg 4, 55128, Mainz, Germany
| | - Petra Beli
- Institute of Molecular Biology (IMB), Ackermannweg 4, 55128, Mainz, Germany
| | - Stefan Müller
- Institute of Biochemistry II (IBCII), Medical Faculty, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Sjoerd J L van Wijk
- Institute for Experimental Pediatric Hematology and Oncology, Medical Faculty, Goethe-University Frankfurt, Komturstrasse 3a, 60528, Frankfurt am Main, Germany.
- German Cancer Consortium (DKTK), partner site Frankfurt/Mainz, Frankfurt am Main, Germany.
- German Cancer Research Center (DKFZ), Heidelberg, Germany.
- University Cancer Centre Frankfurt (UCT), University Hospital Frankfurt, Goethe-University Frankfurt, Frankfurt, Germany.
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Su CM, Hung YF, Tang J, Han M, Everett R, Yoo D. Suppression of TRIM19 by arterivirus nonstructural protein 1 promotes viral replication. Virus Res 2024; 340:199302. [PMID: 38104946 PMCID: PMC10776440 DOI: 10.1016/j.virusres.2023.199302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 12/05/2023] [Accepted: 12/14/2023] [Indexed: 12/19/2023]
Abstract
Tripartite motif (TRIM)-containing proteins are a family of regulatory proteins that can participate in the induction of antiviral cytokines and antagonize viral replication. Promyelocytic leukemia (PML) protein is known as TRIM19 and is a major scaffold protein organizing the PML nuclear bodies (NBs). PML NBs are membrane-less organelles in the nucleus and play a diverse role in maintaining cellular homeostasis including antiviral response. Porcine reproductive and respiratory syndrome virus (PRRSV), a member virus of the family Arteriviridae, inhibits type I interferon (IFN) response during infection, and nonstructural protein 1 (nsp1) of the virus has been identified as a potent IFN antagonist. We report that the numbers of PML NBs per nucleus were significantly downregulated during infection of PRRSV. The overexpression of all six isoforms of PML suppressed the PRRSV replication, and conversely, the silencing of PML gene expression enhanced the PRRSV replication. The suppression of PML NBs by the nsp1 protein was common in other member viruses of the family, represented by equine arteritis virus, lactate dehydrogenase elevating virus of mice, and simian hemorrhagic fever virus. Our study unveils a conserved viral strategy in arteriviruses for innate immune evasion.
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Affiliation(s)
- Chia-Ming Su
- Department of Pathobiology, University of Illinois at Urbana-Champaign, 2001 South Lincoln Ave, Urbana, IL 61802, United States
| | - Yu Fan Hung
- Department of Pathobiology, University of Illinois at Urbana-Champaign, 2001 South Lincoln Ave, Urbana, IL 61802, United States
| | - Junyu Tang
- Department of Pathobiology, University of Illinois at Urbana-Champaign, 2001 South Lincoln Ave, Urbana, IL 61802, United States
| | - Mingyuan Han
- Department of Pathobiology, University of Illinois at Urbana-Champaign, 2001 South Lincoln Ave, Urbana, IL 61802, United States
| | - Roger Everett
- MRC-University of Glasgow Center for Virus Research, Glasgow, Scotland, United Kingdom
| | - Dongwan Yoo
- Department of Pathobiology, University of Illinois at Urbana-Champaign, 2001 South Lincoln Ave, Urbana, IL 61802, United States.
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Roy A, Ghosh A. Epigenetic Restriction Factors (eRFs) in Virus Infection. Viruses 2024; 16:183. [PMID: 38399958 PMCID: PMC10892949 DOI: 10.3390/v16020183] [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: 12/09/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 02/25/2024] Open
Abstract
The ongoing arms race between viruses and their hosts is constantly evolving. One of the ways in which cells defend themselves against invading viruses is by using restriction factors (RFs), which are cell-intrinsic antiviral mechanisms that block viral replication and transcription. Recent research has identified a specific group of RFs that belong to the cellular epigenetic machinery and are able to restrict the gene expression of certain viruses. These RFs can be referred to as epigenetic restriction factors or eRFs. In this review, eRFs have been classified into two categories. The first category includes eRFs that target viral chromatin. So far, the identified eRFs in this category include the PML-NBs, the KRAB/KAP1 complex, IFI16, and the HUSH complex. The second category includes eRFs that target viral RNA or, more specifically, the viral epitranscriptome. These epitranscriptomic eRFs have been further classified into two types: those that edit RNA bases-adenosine deaminase acting on RNA (ADAR) and pseudouridine synthases (PUS), and those that covalently modify viral RNA-the N6-methyladenosine (m6A) writers, readers, and erasers. We delve into the molecular machinery of eRFs, their role in limiting various viruses, and the mechanisms by which viruses have evolved to counteract them. We also examine the crosstalk between different eRFs, including the common effectors that connect them. Finally, we explore the potential for new discoveries in the realm of epigenetic networks that restrict viral gene expression, as well as the future research directions in this area.
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Affiliation(s)
- Arunava Roy
- Department of Molecular Medicine, University of South Florida, Tampa, FL 33612, USA;
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10
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Bercier P, Wang QQ, Zang N, Zhang J, Yang C, Maimaitiyiming Y, Abou-Ghali M, Berthier C, Wu C, Niwa-Kawakita M, Dirami T, Geoffroy MC, Ferhi O, Quentin S, Benhenda S, Ogra Y, Gueroui Z, Zhou C, Naranmandura H, de Thé H, Lallemand-Breitenbach V. Structural Basis of PML-RARA Oncoprotein Targeting by Arsenic Unravels a Cysteine Rheostat Controlling PML Body Assembly and Function. Cancer Discov 2023; 13:2548-2565. [PMID: 37655965 PMCID: PMC10714139 DOI: 10.1158/2159-8290.cd-23-0453] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 07/31/2023] [Accepted: 08/30/2023] [Indexed: 09/02/2023]
Abstract
PML nuclear bodies (NB) are disrupted in PML-RARA-driven acute promyelocytic leukemia (APL). Arsenic trioxide (ATO) cures 70% of patients with APL, driving PML-RARA degradation and NB reformation. In non-APL cells, arsenic binding onto PML also amplifies NB formation. Yet, the actual molecular mechanism(s) involved remain(s) elusive. Here, we establish that PML NBs display some features of liquid-liquid phase separation and that ATO induces a gel-like transition. PML B-box-2 structure reveals an alpha helix driving B2 trimerization and positioning a cysteine trio to form an ideal arsenic-binding pocket. Altering either of the latter impedes ATO-driven NB assembly, PML sumoylation, and PML-RARA degradation, mechanistically explaining clinical ATO resistance. This B2 trimer and the C213 trio create an oxidation-sensitive rheostat that controls PML NB assembly dynamics and downstream signaling in both basal state and during stress response. These findings identify the structural basis for arsenic targeting of PML that could pave the way to novel cancer drugs. SIGNIFICANCE Arsenic curative effects in APL rely on PML targeting. We report a PML B-box-2 structure that drives trimer assembly, positioning a cysteine trio to form an arsenic-binding pocket, which is disrupted in resistant patients. Identification of this ROS-sensitive triad controlling PML dynamics and functions could yield novel drugs. See related commentary by Salomoni, p. 2505. This article is featured in Selected Articles from This Issue, p. 2489.
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Affiliation(s)
- Pierre Bercier
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, Paris, France
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
| | - Qian Qian Wang
- Department of Hematology of First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Public Health, School of Medicine and Department of Toxicology, Zhejiang University, Hangzhou, China
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Ning Zang
- Public Health, School of Medicine and Department of Toxicology, Zhejiang University, Hangzhou, China
- Department of Pathology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jie Zhang
- Public Health, School of Medicine and Department of Toxicology, Zhejiang University, Hangzhou, China
- Department of Pathology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Chang Yang
- Department of Hematology of First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Public Health, School of Medicine and Department of Toxicology, Zhejiang University, Hangzhou, China
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Yasen Maimaitiyiming
- Department of Hematology of First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Public Health, School of Medicine and Department of Toxicology, Zhejiang University, Hangzhou, China
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Majdouline Abou-Ghali
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, Paris, France
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
| | - Caroline Berthier
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, Paris, France
| | - Chengchen Wu
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, Paris, France
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
| | - Michiko Niwa-Kawakita
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, Paris, France
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
| | - Thassadite Dirami
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, Paris, France
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
| | - Marie-Claude Geoffroy
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, Paris, France
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
| | - Omar Ferhi
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, Paris, France
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
| | - Samuel Quentin
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
| | - Shirine Benhenda
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
| | - Yasumitsu Ogra
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Zoher Gueroui
- Department of Chemistry, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, Paris, France
| | - Chun Zhou
- Public Health, School of Medicine and Department of Toxicology, Zhejiang University, Hangzhou, China
- Department of Pathology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hua Naranmandura
- Department of Hematology of First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Public Health, School of Medicine and Department of Toxicology, Zhejiang University, Hangzhou, China
| | - Hugues de Thé
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, Paris, France
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
- Hematology Laboratory, Hôpital St Louis, AP/HP, Paris, France
| | - Valérie Lallemand-Breitenbach
- Center for Interdisciplinary Research in Biology (CIRB), Collège de France, CNRS, INSERM, Université PSL, Paris, France
- GenCellDis, Inserm U944, CNRS UMR7212, Université Paris Cité, Paris, France
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11
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Silonov SA, Smirnov EY, Kuznetsova IM, Turoverov KK, Fonin AV. PML Body Biogenesis: A Delicate Balance of Interactions. Int J Mol Sci 2023; 24:16702. [PMID: 38069029 PMCID: PMC10705990 DOI: 10.3390/ijms242316702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 12/18/2023] Open
Abstract
PML bodies are subnuclear protein complexes that play a crucial role in various physiological and pathological cellular processes. One of the general structural proteins of PML bodies is a member of the tripartite motif (TRIM) family-promyelocytic leukemia protein (PML). It is known that PML interacts with over a hundred partners, and the protein itself is represented by several major isoforms, differing in their variable and disordered C-terminal end due to alternative splicing. Despite nearly 30 years of research, the mechanisms underlying PML body formation and the role of PML proteins in this process remain largely unclear. In this review, we examine the literature and highlight recent progress in this field, with a particular focus on understanding the role of individual domains of the PML protein, its post-translational modifications, and polyvalent nonspecific interactions in the formation of PML bodies. Additionally, based on the available literature, we propose a new hypothetical model of PML body formation.
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Affiliation(s)
- Sergey A. Silonov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, St. Petersburg 194064, Russia; (E.Y.S.); (I.M.K.); (K.K.T.)
| | | | | | | | - Alexander V. Fonin
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, St. Petersburg 194064, Russia; (E.Y.S.); (I.M.K.); (K.K.T.)
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12
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Fracassi C, Ugge' M, Abdelhalim M, Zapparoli E, Simoni M, Magliulo D, Mazza D, Lazarevic D, Morelli M, Collas P, Bernardi R. PML modulates epigenetic composition of chromatin to regulate expression of pro-metastatic genes in triple-negative breast cancer. Nucleic Acids Res 2023; 51:11024-11039. [PMID: 37823593 PMCID: PMC10639071 DOI: 10.1093/nar/gkad819] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 09/04/2023] [Accepted: 09/20/2023] [Indexed: 10/13/2023] Open
Abstract
The promyelocytic leukemia (PML) protein organizes nuclear aggregates known as PML nuclear bodies (PML-NBs), where many transcription factors localize to be regulated. In addition, associations of PML and PML-NBs with chromatin are described in various cell types, further implicating PML in transcriptional regulation. However, a complete understanding of the functional consequences of PML association to DNA in cellular contexts where it promotes relevant phenotypes is still lacking. We examined PML chromatin association in triple-negative breast cancer (TNBC) cell lines, where it exerts important oncogenic functions. We find that PML associates discontinuously with large heterochromatic PML-associated domains (PADs) that contain discrete gene-rich euchromatic sub-domains locally depleted of PML. PML promotes heterochromatic organization in PADs and expression of pro-metastatic genes embedded in these sub-domains. Importantly, this occurs outside PML-NBs, suggesting that nucleoplasmic PML exerts a relevant gene regulatory function. We also find that PML plays indirect regulatory roles in TNBC cells by promoting the expression of pro-metastatic genes outside PADs. Our findings suggest that PML is an important transcriptional regulator of pro-oncogenic metagenes in TNBC cells, via transcriptional regulation and epigenetic organization of heterochromatin domains that embed regions of local transcriptional activity.
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Affiliation(s)
- Cristina Fracassi
- Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Martina Ugge'
- Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Mohamed Abdelhalim
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Ettore Zapparoli
- Center for Omics Sciences, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Matilde Simoni
- Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Daniela Magliulo
- Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Davide Mazza
- Experimental Imaging Center, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Dejan Lazarevic
- Center for Omics Sciences, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Marco J Morelli
- Center for Omics Sciences, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Philippe Collas
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Immunology and Transfusion Medicine, Oslo University Hospital, Oslo, Norway
| | - Rosa Bernardi
- Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Milano, Italy
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13
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Li K, Xia Y, He J, Wang J, Li J, Ye M, Jin X. The SUMOylation and ubiquitination crosstalk in cancer. J Cancer Res Clin Oncol 2023; 149:16123-16146. [PMID: 37640846 DOI: 10.1007/s00432-023-05310-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 08/16/2023] [Indexed: 08/31/2023]
Abstract
BACKGROUND The cancer occurrence and progression are largely affected by the post-translational modifications (PTMs) of proteins. Currently, it has been shown that the relationship between ubiquitination and SUMOylation is highly complex and interactive. SUMOylation affects the process of ubiquitination and degradation of substrates. Contrarily, SUMOylation-related proteins are also regulated by the ubiquitination process thus altering their protein levels or activity. Emerging evidence suggests that the abnormal regulation between this crosstalk may lead to tumorigenesis. PURPOSE In this review, we have discussed the study of the relationship between ubiquitination and SUMOylation, as well as the possibility of a corresponding application in tumor therapy. METHODS The relevant literatures from PubMed have been reviewed for this article. CONCLUSION The interaction between ubiquitination and SUMOylation is crucial for the occurrence and development of cancer. A greater understanding of the crosstalk of SUMOylation and ubiquitination may be more conducive to the development of more selective and effective SUMOylation inhibitors, as well as a promotion of synergy with other tumor treatment strategies.
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Affiliation(s)
- Kailang Li
- Department of Oncology, The First Hospital of Ningbo University, Ningbo, 315020, China
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, 315211, China
| | - Yongming Xia
- Department of Oncology, Yuyao People's Hospital of Zhejiang, Yuyao, 315400, Zhejiang, China
| | - Jian He
- Department of Oncology, The First Hospital of Ningbo University, Ningbo, 315020, China
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, 315211, China
| | - Jie Wang
- Department of Oncology, The First Hospital of Ningbo University, Ningbo, 315020, China
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, 315211, China
| | - Jingyun Li
- Department of Oncology, The First Hospital of Ningbo University, Ningbo, 315020, China
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, 315211, China
| | - Meng Ye
- Department of Oncology, The First Hospital of Ningbo University, Ningbo, 315020, China.
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, 315211, China.
| | - Xiaofeng Jin
- Department of Oncology, The First Hospital of Ningbo University, Ningbo, 315020, China.
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, 315211, China.
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14
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Saribas AS, Bellizzi A, Wollebo HS, Beer T, Tang HY, Safak M. Human neurotropic polyomavirus, JC virus, late coding region encodes a novel nuclear protein, ORF4, which targets the promyelocytic leukemia nuclear bodies (PML-NBs) and modulates their reorganization. Virology 2023; 587:109866. [PMID: 37741199 PMCID: PMC10602023 DOI: 10.1016/j.virol.2023.109866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 08/02/2023] [Accepted: 08/04/2023] [Indexed: 09/25/2023]
Abstract
We previously reported the discovery and characterization of two novel proteins (ORF1 and ORF2) generated by the alternative splicing of the JC virus (JCV) late coding region. Here, we report the discovery and partial characterization of three additional novel ORFs from the same coding region, ORF3, ORF4 and ORF5, which potentially encode 70, 173 and 265 amino acid long proteins respectively. While ORF3 protein exhibits a uniform distribution pattern throughout the cells, we were unable to detect ORF5 expression. Surprisingly, ORF4 protein was determined to be the only JCV protein specifically targeting the promyelocytic leukemia nuclear bodies (PML-NBs) and inducing their reorganization in nucleus. Although ORF4 protein has a modest effect on JCV replication, it is implicated to play major roles during the JCV life cycle, perhaps by regulating the antiviral response of PML-NBs against JCV infections and thus facilitating the progression of the JCV-induced disease in infected individuals.
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Affiliation(s)
- A Sami Saribas
- Department of Microbiology, Immunology, and Inflammation, Laboratory of Molecular Neurovirology, MERB-757, Lewis Katz School of Medicine at Temple University, 3500 N. Broad Street, Philadelphia, PA 19140, USA
| | - Anna Bellizzi
- Department of Microbiology, Immunology, and Inflammation, Laboratory of Molecular Neurovirology, MERB-757, Lewis Katz School of Medicine at Temple University, 3500 N. Broad Street, Philadelphia, PA 19140, USA
| | - Hassen S Wollebo
- Department of Microbiology, Immunology, and Inflammation, Laboratory of Molecular Neurovirology, MERB-757, Lewis Katz School of Medicine at Temple University, 3500 N. Broad Street, Philadelphia, PA 19140, USA
| | - Thomas Beer
- The Wistar Institute Proteomics and Metabolomics Facility Room 252, 3601 Spruce Street, Philadelphia, PA 19104, USA
| | - Hsin-Yao Tang
- The Wistar Institute Proteomics and Metabolomics Facility Room 252, 3601 Spruce Street, Philadelphia, PA 19104, USA
| | - Mahmut Safak
- Department of Microbiology, Immunology, and Inflammation, Laboratory of Molecular Neurovirology, MERB-757, Lewis Katz School of Medicine at Temple University, 3500 N. Broad Street, Philadelphia, PA 19140, USA.
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15
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Kao HY, Pai CP, Wang H, Agarwal N, Adams J, Liu Z, Seachrist D, Keri R, Schiemann W. The PML1-WDR5 axis regulates H3K4me3 marks and promotes stemness of estrogen receptor-positive breast cancer. RESEARCH SQUARE 2023:rs.3.rs-3266720. [PMID: 37720048 PMCID: PMC10503857 DOI: 10.21203/rs.3.rs-3266720/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
The alternative splicing of PML precursor mRNA gives rise to various PML isoforms, yet their expression profile in breast cancer cells remains uncharted. We discovered that PML1 is the most abundant isoform in all breast cancer subtypes, and its expression is associated with unfavorable prognosis in estrogen receptor-positive (ER+) breast cancers. PML depletion reduces cell proliferation, invasion, and stemness, while heterologous PML1 expression augments these processes and fuels tumor growth and resistance to fulvestrant, an FDA-approved drug for ER + breast cancer, in a mouse model. Moreover, PML1, rather than the well-known tumor suppressor isoform PML4, rescues the proliferation of PML knockdown cells. ChIP-seq analysis reveals significant overlap between PML-, ER-, and Myc-bound promoters, suggesting their coordinated regulation of target gene expression, including genes involved in breast cancer stem cells (BCSCs), such as JAG1, KLF4, YAP1, SNAI1, and MYC. Loss of PML reduces BCSC-related gene expression, and exogenous PML1 expression elevates their expression. Consistently, PML1 restores the association of PML with these promoters in PML-depleted cells. We identified a novel association between PML1 and WDR5, a key component of H3K4 methyltransferase (HMTs) complexes that catalyze H3K4me1 and H3K4me3. ChIP-seq analyses showed that the loss of PML1 reduces H3K4me3 in numerous loci, including BCSC-associated gene promoters. Additionally, PML1, not PML4, re-establishes the H3K4me3 mark on these promoters in PML-depleted cells. Significantly, PML1 is essential for recruiting WDR5, MLL1, and MLL2 to these gene promoters. Inactivating WDR5 by knockdown or inhibitors phenocopies the effects of PML1 loss, reducing BCSC-related gene expression and tumorsphere formation and enhancing fulvestrant's anticancer activity. Our findings challenge the conventional understanding of PML as a tumor suppressor, redefine its role as a promoter of tumor growth in breast cancer and offer new insights into the unique roles of PML isoforms in breast cancer.
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Affiliation(s)
| | | | | | | | - Joshua Adams
- Washington University School of Medicine in St. Louis
| | | | | | - Ruth Keri
- Cleveland Clinic Lerner Research Institute
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16
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Liu Z, Qin Z, Liu Y, Xia X, He L, Chen N, Hu X, Peng X. Liquid‒liquid phase separation: roles and implications in future cancer treatment. Int J Biol Sci 2023; 19:4139-4156. [PMID: 37705755 PMCID: PMC10496506 DOI: 10.7150/ijbs.81521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 07/23/2023] [Indexed: 09/15/2023] Open
Abstract
Liquid‒liquid phase separation (LLPS) is a phenomenon driven by weak interactions between biomolecules, such as proteins and nucleic acids, that leads to the formation of distinct liquid-like condensates. Through LLPS, membraneless condensates are formed, selectively concentrating specific proteins while excluding other molecules to maintain normal cellular functions. Emerging evidence shows that cancer-related mutations cause aberrant condensate assembly, resulting in disrupted signal transduction, impaired DNA repair, and abnormal chromatin organization and eventually contributing to tumorigenesis. The objective of this review is to summarize recent advancements in understanding the potential implications of LLPS in the contexts of cancer progression and therapeutic interventions. By interfering with LLPS, it may be possible to restore normal cellular processes and inhibit tumor progression. The underlying mechanisms and potential drug targets associated with LLPS in cancer are discussed, shedding light on promising opportunities for novel therapeutic interventions.
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Affiliation(s)
- Zheran Liu
- Department of Biotherapy and National Clinical Research Center for Geriatrics, Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Zijian Qin
- Department of Biotherapy and National Clinical Research Center for Geriatrics, Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Yingtong Liu
- Chengdu University of Traditional Chinese Medicine, Chengdu 610041, Sichuan, China
| | - Xi Xia
- Shanghai ETERN Biopharma Co., Ltd., Shanghai, China
| | - Ling He
- Department of Biotherapy and National Clinical Research Center for Geriatrics, Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Na Chen
- School of Pharmacy, Chengdu Medical College, Xindu Avenue No 783, Chengdu, 610500, Sichuan Province, China
| | - Xiaolin Hu
- West China School of Nursing, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Xingchen Peng
- Department of Biotherapy and National Clinical Research Center for Geriatrics, Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
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17
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Trier I, Black EM, Joo YK, Kabeche L. ATR protects centromere identity by promoting DAXX association with PML nuclear bodies. Cell Rep 2023; 42:112495. [PMID: 37163376 DOI: 10.1016/j.celrep.2023.112495] [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: 10/03/2022] [Revised: 03/10/2023] [Accepted: 04/25/2023] [Indexed: 05/12/2023] Open
Abstract
Centromere protein A (CENP-A) defines centromere identity and nucleates kinetochore formation for mitotic chromosome segregation. Here, we show that ataxia telangiectasia and Rad3-related (ATR) kinase, a master regulator of the DNA damage response, protects CENP-A occupancy at interphase centromeres in a DNA damage-independent manner. In unperturbed cells, ATR localizes to promyelocytic leukemia nuclear bodies (PML NBs), which house the histone H3.3 chaperone DAXX (death domain-associated protein 6). We find that ATR inhibition reduces DAXX association with PML NBs, resulting in the DAXX-dependent loss of CENP-A and an aberrant increase in H3.3 at interphase centromeres. Additionally, we show that ATR-dependent phosphorylation within the C terminus of DAXX regulates CENP-A occupancy at centromeres and DAXX localization. Lastly, we demonstrate that acute ATR inhibition during interphase leads to kinetochore formation defects and an increased rate of lagging chromosomes. These findings highlight a mechanism by which ATR protects centromere identity and genome stability.
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Affiliation(s)
- Isabelle Trier
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06511, USA; Yale Cancer Biology Institute, Yale University, West Haven, CT 06516, USA
| | - Elizabeth M Black
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06511, USA; Yale Cancer Biology Institute, Yale University, West Haven, CT 06516, USA
| | - Yoon Ki Joo
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06511, USA; Yale Cancer Biology Institute, Yale University, West Haven, CT 06516, USA
| | - Lilian Kabeche
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06511, USA; Yale Cancer Biology Institute, Yale University, West Haven, CT 06516, USA.
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18
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Ryabchenko B, Šroller V, Horníková L, Lovtsov A, Forstová J, Huérfano S. The interactions between PML nuclear bodies and small and medium size DNA viruses. Virol J 2023; 20:82. [PMID: 37127643 PMCID: PMC10152602 DOI: 10.1186/s12985-023-02049-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 04/23/2023] [Indexed: 05/03/2023] Open
Abstract
Promyelocytic leukemia nuclear bodies (PM NBs), often referred to as membraneless organelles, are dynamic macromolecular protein complexes composed of a PML protein core and other transient or permanent components. PML NBs have been shown to play a role in a wide variety of cellular processes. This review describes in detail the diverse and complex interactions between small and medium size DNA viruses and PML NBs that have been described to date. The PML NB components that interact with small and medium size DNA viruses include PML protein isoforms, ATRX/Daxx, Sp100, Sp110, HP1, and p53, among others. Interaction between viruses and components of these NBs can result in different outcomes, such as influencing viral genome expression and/or replication or impacting IFN-mediated or apoptotic cell responses to viral infection. We discuss how PML NB components abrogate the ability of adenoviruses or Hepatitis B virus to transcribe and/or replicate their genomes and how papillomaviruses use PML NBs and their components to promote their propagation. Interactions between polyomaviruses and PML NBs that are poorly understood but nevertheless suggest that the NBs can serve as scaffolds for viral replication or assembly are also presented. Furthermore, complex interactions between the HBx protein of hepadnaviruses and several PML NBs-associated proteins are also described. Finally, current but scarce information regarding the interactions of VP3/apoptin of the avian anellovirus with PML NBs is provided. Despite the considerable number of studies that have investigated the functions of the PML NBs in the context of viral infection, gaps in our understanding of the fine interactions between viruses and the very dynamic PML NBs remain. The complexity of the bodies is undoubtedly a great challenge that needs to be further addressed.
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Affiliation(s)
- Boris Ryabchenko
- Department of Genetics and Microbiology, Faculty of Science, BIOCEV, Charles University, Vestec, 25250, Czech Republic
| | - Vojtěch Šroller
- Department of Genetics and Microbiology, Faculty of Science, BIOCEV, Charles University, Vestec, 25250, Czech Republic
| | - Lenka Horníková
- Department of Genetics and Microbiology, Faculty of Science, BIOCEV, Charles University, Vestec, 25250, Czech Republic
| | - Alexey Lovtsov
- Department of Genetics and Microbiology, Faculty of Science, BIOCEV, Charles University, Vestec, 25250, Czech Republic
| | - Jitka Forstová
- Department of Genetics and Microbiology, Faculty of Science, BIOCEV, Charles University, Vestec, 25250, Czech Republic
| | - Sandra Huérfano
- Department of Genetics and Microbiology, Faculty of Science, BIOCEV, Charles University, Vestec, 25250, Czech Republic.
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19
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Roos K, Berkholz J. LDL Affects the Immunomodulatory Response of Endothelial Cells by Modulation of the Promyelocytic Leukemia Protein (PML) Expression via PKC. Int J Mol Sci 2023; 24:ijms24087306. [PMID: 37108469 PMCID: PMC10138343 DOI: 10.3390/ijms24087306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/04/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
In addition to its function as an intravascular lipid transporter, LDL also triggers signal transduction in endothelial cells (ECs), which, among other things, trigger immunomodulatory cascades, e.g., IL-6 upregulation. However, the molecular mechanisms of how these LDL-triggered immunological responses in ECs are realized are not fully understood. Since promyelocytic leukemia protein (PML) plays a role in promoting inflammatory processes, we examined the relationship between LDL, PML, and IL-6 in human ECs (HUVECs and EA.hy926 cells). RT-qPCR, immunoblotting, and immunofluorescence analyses showed that LDL but not HDL induced higher PML expression and higher numbers of PML-nuclear bodies (PML-NBs). Transfection of the ECs with a PML gene-encoding vector or PML-specific siRNAs demonstrated PML-regulated IL-6 and IL-8 expression and secretion after LDL exposure. Moreover, incubation with the PKC inhibitor sc-3088 or the PKC activator PMA showed that LDL-induced PKC activity leads to the upregulation of PML mRNA and PML protein. In summary, our experimental data suggest that high LDL concentrations trigger PKC activity in ECs to upregulate PML expression, which then increases production and secretion of IL-6 and IL-8. This molecular cascade represents a novel cellular signaling pathway with immunomodulatory effects in ECs in response to LDL exposure.
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Affiliation(s)
- Kerrin Roos
- Institute of Physiology, Charité-Universitätsmedizin, 10117 Berlin, Germany
| | - Janine Berkholz
- Institute of Physiology, Charité-Universitätsmedizin, 10117 Berlin, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, 10785 Berlin, Germany
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20
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Jacksi M, Schad E, Buday L, Tantos A. Absence of Scaffold Protein Tks4 Disrupts Several Signaling Pathways in Colon Cancer Cells. Int J Mol Sci 2023; 24:ijms24021310. [PMID: 36674824 PMCID: PMC9861885 DOI: 10.3390/ijms24021310] [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: 12/03/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 01/12/2023] Open
Abstract
Tks4 is a large scaffold protein in the EGFR signal transduction pathway that is involved in several cellular processes, such as cellular motility, reactive oxygen species-dependent processes, and embryonic development. It is also implicated in a rare developmental disorder, Frank-ter Haar syndrome. Loss of Tks4 resulted in the induction of an EMT-like process, with increased motility and overexpression of EMT markers in colorectal carcinoma cells. In this work, we explored the broader effects of deletion of Tks4 on the gene expression pattern of HCT116 colorectal carcinoma cells by transcriptome sequencing of wild-type and Tks4 knockout (KO) cells. We identified several protein coding genes with altered mRNA levels in the Tks4 KO cell line, as well as a set of long non-coding RNAs, and confirmed these changes with quantitative PCR on a selected set of genes. Our results show a significant perturbation of gene expression upon the deletion of Tks4, suggesting the involvement of different signal transduction pathways over the well-known EGFR signaling.
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Affiliation(s)
- Mevan Jacksi
- Institute of Enzymology, Research Centre for Natural Sciences, 1117 Budapest, Hungary
- Doctoral School of Biology, Institute of Biology, ELTE Eötvös Loránd University, 1117 Budapest, Hungary
| | - Eva Schad
- Institute of Enzymology, Research Centre for Natural Sciences, 1117 Budapest, Hungary
| | - László Buday
- Institute of Enzymology, Research Centre for Natural Sciences, 1117 Budapest, Hungary
- Department of Molecular Biology, Semmelweis University Medical School, 1094 Budapest, Hungary
| | - Agnes Tantos
- Institute of Enzymology, Research Centre for Natural Sciences, 1117 Budapest, Hungary
- Correspondence:
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21
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Huang D, Zhao D, Li M, Chang SY, Xue YD, Xu N, Li SJ, Tang NN, Gong LL, Liu YN, Yu H, Li QS, Li PY, Liu JL, Chen HX, Liu MB, Zhang WY, Zhao XM, Lang XZ, Li ZD, Liu Y, Ma ZY, Li JM, Wang N, Tian H, Cai BZ. Crosstalk between PML and p53 in response to TGF-β1: A new mechanism of cardiac fibroblast activation. Int J Biol Sci 2023; 19:994-1006. [PMID: 36778116 PMCID: PMC9910009 DOI: 10.7150/ijbs.76214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 12/06/2022] [Indexed: 02/04/2023] Open
Abstract
Cardiac fibrosis is a common pathological cardiac remodeling in a variety of heart diseases, characterized by the activation of cardiac fibroblasts. Our previous study uncovered that promyelocytic leukemia protein (PML)-associated SUMO processes is a new regulator of cardiac hypertrophy and heart failure. The present study aimed to explore the role of PML in cardiac fibroblasts activation. Here we found that PML is significantly upregulated in cardiac fibrotic tissue and activated cardiac fibroblasts treated with transforming growth factor-β1 (TGF-β1). Gain- and loss-of-function experiments showed that PML impacted cardiac fibroblasts activation after TGF-β1 treatment. Further study demonstrated that p53 acts as the transcriptional regulator of PML, and participated in TGF-β1 induced the increase of PML expression and PML nuclear bodies (PML-NBs) formation. Knockdown or pharmacological inhibition of p53 produced inhibitory effects on the activation of cardiac fibroblasts. We further found that PML also may stabilize p53 through inhibiting its ubiquitin-mediated proteasomal degradation in cardiac fibroblasts. Collectively, this study suggests that PML crosstalk with p53 regulates cardiac fibroblasts activation, which provides a novel therapeutic strategy for cardiac fibrosis.
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Affiliation(s)
- Di Huang
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Dan Zhao
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Ming Li
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Si-Yu Chang
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Ya-Dong Xue
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Ning Xu
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Si-Jia Li
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Nan-Nan Tang
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Li-Ling Gong
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Yi-Ning Liu
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Hang Yu
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Qing-Sui Li
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Peng-Yu Li
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Jia-Li Liu
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Hai-Xin Chen
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Ming-Bin Liu
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Wan-Yu Zhang
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Xing-Miao Zhao
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Xian-Zhi Lang
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Zhen-Dong Li
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Yu Liu
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Zhi-Yong Ma
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Jia-Min Li
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China.,Research Unit of Noninfectious Chronic Diseases in Frigid Zone (2019RU070), Chinese Academy of Medical Sciences, Harbin, 150081, China.,Northern Translational Medicine Research and Cooperation Center, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, 150081, China
| | - Ning Wang
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China.,Research Unit of Noninfectious Chronic Diseases in Frigid Zone (2019RU070), Chinese Academy of Medical Sciences, Harbin, 150081, China.,Northern Translational Medicine Research and Cooperation Center, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, 150081, China
| | - Hai Tian
- Department of Cardiovascular Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150081, China.,Future Medical laboratory, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150081, China
| | - Ben-Zhi Cai
- Department of Pharmacy at the Second Affiliated Hospital, Department of Pharmacology at College of Pharmacy, Harbin Medical University, Harbin, 150081, China.,Research Unit of Noninfectious Chronic Diseases in Frigid Zone (2019RU070), Chinese Academy of Medical Sciences, Harbin, 150081, China.,Northern Translational Medicine Research and Cooperation Center, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, 150081, China
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22
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Ye G, Wang J, Yang W, Li J, Ye M, Jin X. The roles of KLHL family members in human cancers. Am J Cancer Res 2022; 12:5105-5139. [PMID: 36504893 PMCID: PMC9729911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 11/08/2022] [Indexed: 12/15/2022] Open
Abstract
The Kelch-like (KLHL) family members consist of three domains: bric-a-brac, tramtrack, broad complex/poxvirus and zinc finger domain, BACK domain and Kelch domain, which combine and interact with Cullin3 to form an E3 ubiquitin ligase. Research has indicated that KLHL family members ubiquitinate target substrates to regulate physiological and pathological processes, including tumorigenesis and progression. KLHL19, a member of the KLHL family, is associated with tumorigenesis and drug resistance. However, the regulation and cross talks of other KLHL family members, which also play roles in cancer, are still unclear. Our review mainly explores studies concerning the roles of other KLHL family members in tumor-related regulation to provide novel insights into KLHL family members.
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Affiliation(s)
- Ganghui Ye
- The Affiliated Hospital of Medical School, Ningbo UniversityNingbo 315020, Zhejiang, P. R. China,Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo UniversityNingbo 315211, Zhejiang, P. R. China
| | - Jie Wang
- The Affiliated Hospital of Medical School, Ningbo UniversityNingbo 315020, Zhejiang, P. R. China,Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo UniversityNingbo 315211, Zhejiang, P. R. China
| | - Weili Yang
- Yinzhou People’s Hospital of Medical School, Ningbo UniversityNingbo 315040, Zhejiang, P. R. China
| | - Jinyun Li
- The Affiliated Hospital of Medical School, Ningbo UniversityNingbo 315020, Zhejiang, P. R. China,Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo UniversityNingbo 315211, Zhejiang, P. R. China
| | - Meng Ye
- The Affiliated Hospital of Medical School, Ningbo UniversityNingbo 315020, Zhejiang, P. R. China,Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo UniversityNingbo 315211, Zhejiang, P. R. China
| | - Xiaofeng Jin
- The Affiliated Hospital of Medical School, Ningbo UniversityNingbo 315020, Zhejiang, P. R. China,Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Medical School of Ningbo UniversityNingbo 315211, Zhejiang, P. R. China
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23
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Mitrea DM, Mittasch M, Gomes BF, Klein IA, Murcko MA. Modulating biomolecular condensates: a novel approach to drug discovery. Nat Rev Drug Discov 2022; 21:841-862. [PMID: 35974095 PMCID: PMC9380678 DOI: 10.1038/s41573-022-00505-4] [Citation(s) in RCA: 73] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/08/2022] [Indexed: 12/12/2022]
Abstract
In the past decade, membraneless assemblies known as biomolecular condensates have been reported to play key roles in many cellular functions by compartmentalizing specific proteins and nucleic acids in subcellular environments with distinct properties. Furthermore, growing evidence supports the view that biomolecular condensates often form by phase separation, in which a single-phase system demixes into a two-phase system consisting of a condensed phase and a dilute phase of particular biomolecules. Emerging understanding of condensate function in normal and aberrant cellular states, and of the mechanisms of condensate formation, is providing new insights into human disease and revealing novel therapeutic opportunities. In this Perspective, we propose that such insights could enable a previously unexplored drug discovery approach based on identifying condensate-modifying therapeutics (c-mods), and we discuss the strategies, techniques and challenges involved.
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24
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Zhang Y, Zhang W, Zheng L, Guo Q. The roles and targeting options of TRIM family proteins in tumor. Front Pharmacol 2022; 13:999380. [PMID: 36249749 PMCID: PMC9561884 DOI: 10.3389/fphar.2022.999380] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 08/29/2022] [Indexed: 11/13/2022] Open
Abstract
Tripartite motif (TRIM) containing proteins are a class of E3 ubiquitin ligases, which are critically implicated in the occurrence and development of tumors. They can function through regulating various aspects of tumors, such as tumor proliferation, metastasis, apoptosis and the development of drug resistance during tumor therapy. Some members of TRIM family proteins can mediate protein ubiquitination and chromosome translocation via modulating several signaling pathways, like p53, NF-κB, AKT, MAPK, Wnt/β-catenin and other molecular regulatory mechanisms. The multi-domain nature/multi-functional biological role of TRIMs implies that blocking just one function or one domain might not be sufficient to obtain the desired therapeutic outcome, therefore, a detailed and systematic understanding of the biological functions of the individual domains of TRIMs is required. This review mainly described their roles and underlying mechanisms in tumorigenesis and progression, and it might shade light on a potential targeting strategy for TRIMs in tumor treatment, especially using PROTACs.
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Affiliation(s)
- Yuxin Zhang
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University and Henan Cancer Hospital, Zhengzhou, China
- School of Life Science and Technology, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, Nanjing, China
| | - Wenzhou Zhang
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University and Henan Cancer Hospital, Zhengzhou, China
| | - Lufeng Zheng
- School of Life Science and Technology, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, Nanjing, China
- *Correspondence: Lufeng Zheng, ; Qianqian Guo,
| | - Qianqian Guo
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University and Henan Cancer Hospital, Zhengzhou, China
- School of Life Science and Technology, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, Nanjing, China
- *Correspondence: Lufeng Zheng, ; Qianqian Guo,
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25
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Exploration of nuclear body-enhanced sumoylation reveals that PML represses 2-cell features of embryonic stem cells. Nat Commun 2022; 13:5726. [PMID: 36175410 PMCID: PMC9522831 DOI: 10.1038/s41467-022-33147-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 09/05/2022] [Indexed: 01/12/2023] Open
Abstract
Membrane-less organelles are condensates formed by phase separation whose functions often remain enigmatic. Upon oxidative stress, PML scaffolds Nuclear Bodies (NBs) to regulate senescence or metabolic adaptation. PML NBs recruit many partner proteins, but the actual biochemical mechanism underlying their pleiotropic functions remains elusive. Similarly, PML role in embryonic stem cell (ESC) and retro-element biology is unsettled. Here we demonstrate that PML is essential for oxidative stress-driven partner SUMO2/3 conjugation in mouse ESCs (mESCs) or leukemia, a process often followed by their poly-ubiquitination and degradation. Functionally, PML is required for stress responses in mESCs. Differential proteomics unravel the KAP1 complex as a PML NB-dependent SUMO2-target in arsenic-treated APL mice or mESCs. PML-driven KAP1 sumoylation enables activation of this key epigenetic repressor implicated in retro-element silencing. Accordingly, Pml-/- mESCs re-express transposable elements and display 2-Cell-Like features, the latter enforced by PML-controlled SUMO2-conjugation of DPPA2. Thus, PML orchestrates mESC state by coordinating SUMO2-conjugation of different transcriptional regulators, raising new hypotheses about PML roles in cancer.
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26
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Firnau MB, Brieger A. CK2 and the Hallmarks of Cancer. Biomedicines 2022; 10:biomedicines10081987. [PMID: 36009534 PMCID: PMC9405757 DOI: 10.3390/biomedicines10081987] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 08/08/2022] [Accepted: 08/10/2022] [Indexed: 11/29/2022] Open
Abstract
Cancer is a leading cause of death worldwide. Casein kinase 2 (CK2) is commonly dysregulated in cancer, impacting diverse molecular pathways. CK2 is a highly conserved serine/threonine kinase, constitutively active and ubiquitously expressed in eukaryotes. With over 500 known substrates and being estimated to be responsible for up to 10% of the human phosphoproteome, it is of significant importance. A broad spectrum of diverse types of cancer cells has been already shown to rely on disturbed CK2 levels for their survival. The hallmarks of cancer provide a rationale for understanding cancer’s common traits. They constitute the maintenance of proliferative signaling, evasion of growth suppressors, resisting cell death, enabling of replicative immortality, induction of angiogenesis, the activation of invasion and metastasis, as well as avoidance of immune destruction and dysregulation of cellular energetics. In this work, we have compiled evidence from the literature suggesting that CK2 modulates all hallmarks of cancer, thereby promoting oncogenesis and operating as a cancer driver by creating a cellular environment favorable to neoplasia.
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27
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Jin X, Zhou M, Chen S, Li D, Cao X, Liu B. Effects of pH alterations on stress- and aging-induced protein phase separation. Cell Mol Life Sci 2022; 79:380. [PMID: 35750966 PMCID: PMC9232405 DOI: 10.1007/s00018-022-04393-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/26/2022] [Accepted: 05/21/2022] [Indexed: 01/18/2023]
Abstract
Upon stress challenges, proteins/RNAs undergo liquid–liquid phase separation (LLPS) to fine-tune cell physiology and metabolism to help cells adapt to adverse environments. The formation of LLPS has been recently linked with intracellular pH, and maintaining proper intracellular pH homeostasis is known to be essential for the survival of organisms. However, organisms are constantly exposed to diverse stresses, which are accompanied by alterations in the intracellular pH. Aging processes and human diseases are also intimately linked with intracellular pH alterations. In this review, we summarize stress-, aging-, and cancer-associated pH changes together with the mechanisms by which cells regulate cytosolic pH homeostasis. How critical cell components undergo LLPS in response to pH alterations is also discussed, along with the functional roles of intracellular pH fluctuation in the regulation of LLPS. Further studies investigating the interplay of pH with other stressors in LLPS regulation and identifying protein responses to different pH levels will provide an in-depth understanding of the mechanisms underlying pH-driven LLPS in cell adaptation. Moreover, deciphering aging and disease-associated pH changes that influence LLPS condensate formation could lead to a deeper understanding of the functional roles of biomolecular condensates in aging and aging-related diseases.
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Affiliation(s)
- Xuejiao Jin
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Min Zhou
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Shuxin Chen
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Danqi Li
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Xiuling Cao
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China.
| | - Beidong Liu
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China. .,Department of Chemistry and Molecular Biology, University of Gothenburg, Medicinaregatan 9C, 413 90, Goteborg, Sweden. .,Center for Large-Scale Cell-Based Screening, Faculty of Science, University of Gothenburg, Medicinaregatan 9C, 413 90, Goteborg, Sweden.
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28
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Rubio-Ramos A, Bernabé-Rubio M, Labat-de-Hoz L, Casares-Arias J, Kremer L, Correas I, Alonso MA. MALL, a membrane-tetra-spanning proteolipid overexpressed in cancer, is present in membraneless nuclear biomolecular condensates. Cell Mol Life Sci 2022; 79:236. [PMID: 35399121 PMCID: PMC8995265 DOI: 10.1007/s00018-022-04270-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 03/08/2022] [Accepted: 03/22/2022] [Indexed: 12/04/2022]
Abstract
Proteolipids are proteins with unusual lipid-like properties. It has long been established that PLP and plasmolipin, which are two unrelated membrane-tetra-spanning myelin proteolipids, can be converted in vitro into a water-soluble form with a distinct conformation, raising the question of whether these, or other similar proteolipids, can adopt two different conformations in the cell to adapt their structure to distinct environments. Here, we show that MALL, another proteolipid with a membrane-tetra-spanning structure, distributes in membranes outside the nucleus and, within the nucleus, in membrane-less, liquid-like PML body biomolecular condensates. Detection of MALL in one or other environment was strictly dependent on the method of cell fixation used, suggesting that MALL adopts different conformations depending on its physical environment —lipidic or aqueous— in the cell. The acquisition of the condensate-compatible conformation requires PML expression. Excess MALL perturbed the distribution of the inner nuclear membrane proteins emerin and LAP2β, and that of the DNA-binding protein BAF, leading to the formation of aberrant nuclei. This effect, which is consistent with studies identifying overexpressed MALL as an unfavorable prognostic factor in cancer, could contribute to cell malignancy. Our study establishes a link between proteolipids, membranes and biomolecular condensates, with potential biomedical implications.
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Affiliation(s)
- Armando Rubio-Ramos
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Miguel Bernabé-Rubio
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Leticia Labat-de-Hoz
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Javier Casares-Arias
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Leonor Kremer
- Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, 28049, Madrid, Spain
| | - Isabel Correas
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Department of Molecular Biology, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Miguel A Alonso
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
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29
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Boyenle ID, Oyedele AK, Ogunlana AT, Adeyemo AF, Oyelere FS, Akinola OB, Adelusi TI, Ehigie LO, Ehigie AF. Targeting the mitochondrial permeability transition pore for drug discovery: Challenges and opportunities. Mitochondrion 2022; 63:57-71. [PMID: 35077882 DOI: 10.1016/j.mito.2022.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 12/22/2021] [Accepted: 01/17/2022] [Indexed: 12/29/2022]
Abstract
Several drug targets have been amenable to drug discovery pursuit not until the characterization of the mitochondrial permeability transition pore (MPTP), a pore with an undefined molecular identity that forms on the inner mitochondrial membrane upon mitochondrial permeability transition (MPT) under the influence of calcium overload and oxidative stress. The opening of the pore which is presumed to cause cell death in certain human diseases also has implications under physiological parlance. Different models for this pore have been postulated following its first identification in the last six decades. The mitochondrial community has witnessed many protein candidates such as; voltage-dependent anion channel (VDAC), adenine nucleotide translocase (ANT), Mitochondrial phosphate carrier (PiC), Spastic Paralegin (SPG7), disordered proteins, and F1Fo ATPase. However, genetic studies have cast out most of these candidates with only F1Fo ATPase currently under intense argument. Cyclophilin D (CyPD) remains the widely accepted positive regulator of the MPTP known to date, but no drug candidate has emerged as its inhibitor, raising concern issues for therapeutics. Thus, in this review, we discuss various models of MPTP reported with the hope of stimulating further research in this field. We went beyond the classical description of the MPTP to ascribe a 'two-edged sword property' to the pore for therapeutic function in human disease because its inhibition and activation have pharmacological relevance. We suggested putative proteins upstream to CyPD that can regulate its activity and prevent cell deaths in neurodegenerative disease and ischemia-reperfusion injury.
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Affiliation(s)
- Ibrahim Damilare Boyenle
- Membrane Biochemistry and Biophysics Research Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Nigeria; Computational Biology/Drug Discovery Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | - Abdulquddus Kehinde Oyedele
- Computational Biology/Drug Discovery Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | - Abdeen Tunde Ogunlana
- Computational Biology/Drug Discovery Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | - Aishat Folashade Adeyemo
- Membrane Biochemistry and Biophysics Research Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | | | - Olateju Balikis Akinola
- Membrane Biochemistry and Biophysics Research Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | - Temitope Isaac Adelusi
- Computational Biology/Drug Discovery Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | - Leonard Ona Ehigie
- Computational Biology/Drug Discovery Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | - Adeola Folasade Ehigie
- Membrane Biochemistry and Biophysics Research Laboratory, Department of Biochemistry, Ladoke Akintola University of Technology, Ogbomoso, Nigeria.
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30
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Haidary AM, Noor S, Noor S, Ahmad M, Yousufzai AW, Saadaat R, Ahmed ZA, Rasooli AJ, Zahier AS, Malakzai HA, Ibrahimkhil AS, Sharif S, Anwari MS, Saqib AH, Baryali T, Nasir N. Rare additional chromosomal abnormalities in acute promyelocytic leukaemia resulting in rapidly fatal disease: report of a case. EJHAEM 2022; 3:218-222. [PMID: 35846222 PMCID: PMC9175789 DOI: 10.1002/jha2.349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/04/2021] [Accepted: 11/08/2021] [Indexed: 12/17/2022]
Abstract
Background Acute promyelocytic leukaemia results from reciprocal translocation between the long arms of chromosomes 15 and 17. This translocation leads to the formation of chimeric gene, which is both the diagnostic marker as well as the therapeutic target of the disease. Additional chromosomal abnormalities are randomly encountered either at diagnosis or during therapy. Here, we present a case of acute promyelocytic leukaemia that had a rare cytogenetic profile at diagnosis. Case presentation Our patient was a 14‐year‐old boy, who presented with characteristic clinical and morphological features of acute promyelocytic leukaemia. Karyotypic analysis revealed trisomy of chromosome 8 with deletion of 9p in addition to t(15;17). The patient passed away within the first 8 h of presentation while receiving conventional chemotherapy and haemodynamic resuscitation. Conclusion Our patient presented with a rare cytogenetic profile and rapidly progressive disease. According to our extensive literature search, this was the first case of acute promyelocytic leukaemia having pathognomonic t(15;17) along with trisomy 8 and 9q deletion.
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Affiliation(s)
- Ahmed Maseh Haidary
- Department of Pathology and Clinical Laboratory French Medical Institute for Mothers and Children (FMIC) Kabul Afghanistan
| | - Sarah Noor
- Department of Haemato‐Oncology Ali‐Abad Teaching Hospital Kabul Afghanistan
| | - Sahar Noor
- Department of Paediatric Medicine French Medical Institute for Mothers and Children (FMIC) Kabul Afghanistan
| | - Maryam Ahmad
- Department of Pathology and Clinical Laboratory French Medical Institute for Mothers and Children (FMIC) Kabul Afghanistan
| | | | - Ramin Saadaat
- Department of Pathology and Clinical Laboratory French Medical Institute for Mothers and Children (FMIC) Kabul Afghanistan
| | - Zeeshan Ansar Ahmed
- Department of Pathology and Laboratory Services Agha Khan University Karachi Pakistan
| | - Abdul Jamil Rasooli
- Department of Paediatric Medicine French Medical Institute for Mothers and Children (FMIC) Kabul Afghanistan
| | | | - Haider Ali Malakzai
- Department of Pathology and Clinical Laboratory French Medical Institute for Mothers and Children (FMIC) Kabul Afghanistan
| | - Abdul Sami Ibrahimkhil
- Department of Pathology and Clinical Laboratory French Medical Institute for Mothers and Children (FMIC) Kabul Afghanistan
| | - Samuel Sharif
- Department of Pathology and Clinical Laboratory French Medical Institute for Mothers and Children (FMIC) Kabul Afghanistan
| | - Mohammad Sarwar Anwari
- Department of Pathology and Clinical Laboratory French Medical Institute for Mothers and Children (FMIC) Kabul Afghanistan
| | - Abdul Hadi Saqib
- Department of Pathology and Clinical Laboratory French Medical Institute for Mothers and Children (FMIC) Kabul Afghanistan
| | - Tawab Baryali
- Department of Quality French Medical Institute for Mothers and Children Kabul Afghanistan
| | - Najla Nasir
- Department of Internal Medicine Rabia Balkhi Hospital Kabul Afghanistan
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Uggè M, Simoni M, Fracassi C, Bernardi R. PML isoforms: a molecular basis for PML pleiotropic functions. Trends Biochem Sci 2022; 47:609-619. [DOI: 10.1016/j.tibs.2022.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 02/04/2022] [Accepted: 02/04/2022] [Indexed: 10/19/2022]
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Fonin AV, Silonov SA, Fefilova AS, Stepanenko OV, Gavrilova AA, Petukhov AV, Romanovich AE, Modina AL, Zueva TS, Nedelyaev EM, Pleskach NM, Kuranova ML, Kuznetsova IM, Uversky VN, Turoverov KK. New Evidence of the Importance of Weak Interactions in the Formation of PML-Bodies. Int J Mol Sci 2022; 23:ijms23031613. [PMID: 35163537 PMCID: PMC8835755 DOI: 10.3390/ijms23031613] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/27/2022] [Accepted: 01/27/2022] [Indexed: 12/31/2022] Open
Abstract
In this work, we performed a comparative study of the formation of PML bodies by full-length PML isoforms and their C-terminal domains in the presence and absence of endogenous PML. Based on the analysis of the distribution of intrinsic disorder predisposition in the amino acid sequences of PML isoforms, regions starting from the amino acid residue 395 (i.e., sequences encoded by exons 4–6) were assigned as the C-terminal domains of these proteins. We demonstrate that each of the full-sized nuclear isoforms of PML is capable of forming nuclear liquid-droplet compartments in the absence of other PML isoforms. These droplets possess dynamic characteristics of the exchange with the nucleoplasm close to those observed in the wild-type cells. Only the C-terminal domains of the PML-II and PML-V isoforms are able to be included in the composition of the endogenous PML bodies, while being partially distributed in the nucleoplasm. The bodies formed by the C-terminal domain of the PML-II isoform are dynamic liquid droplet compartments, regardless of the presence or absence of endogenous PML. The C-terminal domain of PML-V forms dynamic liquid droplet compartments in the knockout cells (PML−/−), but when the C-terminus of the PML-V isoform is inserted into the existing endogenous PML bodies, the molecules of this protein cease to exchange with the nucleoplasm. It was demonstrated that the K490R substitution, which disrupts the PML sumoylation, promotes diffuse distribution of the C-terminal domains of PML-II and PML-V isoforms in endogenous PML knockout HeLa cells, but not in the wild-type cells. These data indicate the ability of the C-terminal domains of the PML-II and PML-V isoforms to form dynamic liquid droplet-like compartments, regardless of the ordered N-terminal RBCC motifs of the PML. This indicates a significant role of the non-specific interactions between the mostly disordered C-terminal domains of PML isoforms for the initiation of liquid–liquid phase separation (LLPS) leading to the formation of PML bodies.
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Affiliation(s)
- Alexander V. Fonin
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
- Correspondence: (A.V.F.); (K.K.T.); Tel.: +7-812-2971957 (K.K.T.); Fax: +7-812-2970341 (K.K.T.)
| | - Sergey A. Silonov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
| | - Anna S. Fefilova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
| | - Olesya V. Stepanenko
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
| | - Anastasia A. Gavrilova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
| | - Alexey V. Petukhov
- Almazov National Medical Research Centre, Institute of Hematology, 197341 St. Petersburg, Russia;
| | - Anna E. Romanovich
- Resource Center of Molecular and Cell Technologies, St-Petersburg State University Research Park, Universitetskaya Emb. 7–9, 199034 St. Petersburg, Russia;
| | - Anna L. Modina
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
| | - Tatiana S. Zueva
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
| | - Evgeniy M. Nedelyaev
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
| | - Nadejda M. Pleskach
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
| | - Mirya L. Kuranova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
| | - Irina M. Kuznetsova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
| | - Vladimir N. Uversky
- Department of Molecular Medicine, Byrd Alzheimer’s Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA;
| | - Konstantin K. Turoverov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064 St. Petersburg, Russia; (S.A.S.); (A.S.F.); (O.V.S.); (A.A.G.); (A.L.M.); (T.S.Z.); (E.M.N.); (N.M.P.); (M.L.K.); (I.M.K.)
- Correspondence: (A.V.F.); (K.K.T.); Tel.: +7-812-2971957 (K.K.T.); Fax: +7-812-2970341 (K.K.T.)
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Faber E, Tshilwane SI, Van Kleef M, Pretorius A. Apoptosis versus survival of African horse sickness virus serotype 4-infected horse peripheral blood mononuclear cells. Virus Res 2022; 307:198609. [PMID: 34688785 DOI: 10.1016/j.virusres.2021.198609] [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: 06/15/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 10/20/2022]
Abstract
Expanding on our previous work, this study used transcriptome analysis of RNA sequences to investigate the various factors that contributed to either inducing apoptosis that resulted in cell death or promoting the survival of African horse sickness virus serotype 4 (AHSV4)-infected horse peripheral blood mononuclear cells (PBMC) after 24 h. Apoptosis is a host defense mechanism that prevents virus replication, accumulation and spread of progeny viruses. AHSV4-infected PBMC were killed via the intrinsic and the perforin/granzyme pathways of apoptosis during the attenuated AHSV4 (attAHSV4) in vivo primary and secondary immune responses. Trained innate immunity played an important role in circumventing viral interference that resulted in the elimination of AHSV4-infected PBMC through the intrinsic and the extrinsic pathways of apoptosis during the virulent AHSV4 (virAHSV4) in vitro secondary immune response. Oxidative stress in conjunction with IRE1α pro-apoptotic signaling played a major role in the induction of the intrinsic pathway of apoptosis and cytotoxic lymphocytes induced the perforin/granzyme or extrinsic pathways of apoptosis. In contrast, AHSV4-infected PBMC survived during the virAHSV4 in vitro primary immune response, which allows unrestrained viral replication. The virAHSV4 interference with the innate immune response resulted in impaired NK cell responses and delayed immune responses, which together with the antioxidant defense system promoted AHSV4-infected PBMC survival.
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Affiliation(s)
- Erika Faber
- Agricultural Research Council - Onderstepoort Veterinary Research, Private Bag X5, Onderstepoort, 0110, South Africa; Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa.
| | - Selaelo Ivy Tshilwane
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
| | - Mirinda Van Kleef
- Agricultural Research Council - Onderstepoort Veterinary Research, Private Bag X5, Onderstepoort, 0110, South Africa; Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
| | - Alri Pretorius
- Agricultural Research Council - Onderstepoort Veterinary Research, Private Bag X5, Onderstepoort, 0110, South Africa; Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
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Zhu J, Chen Z, Dai Z, Zhou X, Wang H, Li X, Zhao A, Yang S. Molecular Cloning of Alternative Splicing Variants of the Porcine PML Gene and Its Expression Patterns During Japanese Encephalitis Virus Infection. Front Vet Sci 2021; 8:757978. [PMID: 34888375 PMCID: PMC8649775 DOI: 10.3389/fvets.2021.757978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 10/21/2021] [Indexed: 12/01/2022] Open
Abstract
Promyelocytic leukemia (PML) protein is a crucial component of PML-nuclear bodies (PML-NBs). PML and PML-NBs are involved in the regulation of various cellular functions, including the antiviral immune response. The human PML gene can generate several different isoforms through alternative splicing. However, little is known about the porcine PML alternative splicing isoforms and their expression profiles during Japanese encephalitis virus (JEV) infection. In the present study, we cloned seven mature transcripts of porcine PML, all of which contained the same N-terminal sequence but differed in the C-terminal sequences due to alternative splicing. These seven transcripts encoded five proteins all of which had the RBCC motif and sumoylation sites. Amino acid sequence homology analysis showed that porcine PML-1 had relatively high levels of identity with human, cattle, and goat homologs (76.21, 77.17, and 77.05%, respectively), and low identity with the mouse homolog (61.78%). Immunofluorescence analysis showed that the typical PML-NBs could be observed after overexpression of the five PML isoforms in PK15 cells. Quantitative reverse transcription PCR (RT-qPCR) analysis showed significant upregulation of PML isoforms and PML-NB-associated genes (Daxx and SP100) at 36 and 48 h post-infection (hpi). Western blotting analysis indicated that the PML isoforms were upregulated during the late stage of infection. Moreover, the number of PML-NBs was increased after JEV infection. These results suggest that porcine PML isoforms may play essential roles in JEV infection.
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Affiliation(s)
- Jingjing Zhu
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, China
| | - Zhenyu Chen
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, China
| | - Zhenglie Dai
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, China
| | - Xiaolong Zhou
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, China
| | - Han Wang
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, China
| | - Xiangchen Li
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, China
| | - Ayong Zhao
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, China
| | - Songbai Yang
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang A&F University, Hangzhou, China
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Wang X, Liu T, Huang Y, Dai Y, Lin H. Regulation of transforming growth factor-β signalling by SUMOylation and its role in fibrosis. Open Biol 2021; 11:210043. [PMID: 34753319 PMCID: PMC8580444 DOI: 10.1098/rsob.210043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Fibrosis is an abnormal healing process that only repairs the structure of an organ after injury and does not address damaged functions. The pathogenesis of fibrosis is multifactorial and highly complex; numerous signalling pathways are involved in this process, with the transforming growth factor-β (TGF-β) signalling pathway playing a central role. TGF-β regulates the generation of myofibroblasts and the epithelial-mesenchymal transition by regulating transcription and translation of downstream genes and precisely regulating fibrogenesis. The TGF-β signalling pathway can be modulated by various post-translational modifications, of which SUMOylation has been shown to play a key role. In this review, we focus on the function of SUMOylation in canonical and non-canonical TGF-β signalling and its role in fibrosis, providing promising therapeutic strategies for fibrosis.
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Affiliation(s)
- Xinyi Wang
- First Clinical Medical School, Nanchang University, Nanchang 330006, Jiangxi Province, People's Republic of China
| | - Ting Liu
- Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University, Nanchang 330006, Jiangxi Province, People's Republic of China
| | - Yifei Huang
- First Clinical Medical School, Nanchang University, Nanchang 330006, Jiangxi Province, People's Republic of China
| | - Yifeng Dai
- Second Clinical Medical School, Nanchang University, Nanchang 330006, Jiangxi Province, People's Republic of China
| | - Hui Lin
- Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University, Nanchang 330006, Jiangxi Province, People's Republic of China
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Albadawy R, Agwa SHA, Khairy E, Saad M, El Touchy N, Othman M, Matboli M. Clinical Significance of HSPD1/MMP14/ITGB1/miR-6881-5P/Lnc-SPARCL1-1:2 RNA Panel in NAFLD/NASH Diagnosis: Egyptian Pilot Study. Biomedicines 2021; 9:biomedicines9091248. [PMID: 34572434 PMCID: PMC8472260 DOI: 10.3390/biomedicines9091248] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/15/2021] [Accepted: 09/15/2021] [Indexed: 12/15/2022] Open
Abstract
Background: Non-alcoholic steatohepatitis ((NASH) is the progressive form of (non-alcoholic fatty liver disease) (NAFLD), which can progress to liver cirrhosis and hepatocellular carcinoma. There is no available reliable non-invasive diagnostic tool to diagnose NASH, and still the liver biopsy is the gold standard in diagnosis. In this pilot study, we aimed to evaluate the Nod-like receptor (NLR) signaling pathway related RNA panel in the diagnosis of NASH. Methods: Bioinformatics analysis was done, with retrieval of the HSPD1/MMP14/ITGB1/miR-6881-5P/Lnc-SPARCL1-1:2 RNA panel based on the relation to the NLR-signaling pathway. Hepatitis serum markers, lipid profile, NAFLD score and fibrosis score were assessed in the patients’ sera. Reverse transcriptase real time polymerase chain reaction (RT-PCR) was done to assess the relative expression of the RNA panel among patients who had NAFLD without steatosis, NAFLD with simple steatosis, NASH and healthy controls. Results: We observed up-regulation of Lnc-SPARCL1-1:2 lncRNA that led to upregulation of miR-6881-5P with a subsequent increase in levels of HSPD1, MMP14, and ITGB1 mRNAs. In addition, ROC curve analysis was done, with discriminative cutoff values that aided discrimination between NASH cases and control, and also between NAFLD, simple steatosis and NASH. Conclusion: This pilot study concluded that HSPD1/MMP14/ITGB1/miR-6881-5P/Lnc-SPARCL1-1:2 panel expression has potential in the diagnosis of NASH, and also differentiation between NAFLD, simple steatosis and NASH cases.
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Affiliation(s)
- Reda Albadawy
- Department of Gastroentrology, Hepatology & Infectious Disease, Faculty of Medicine, Benha University, Benha 13518, Egypt;
- Correspondence: (R.A.); (S.H.A.A.); (M.M.)
| | - Sara H. A. Agwa
- Molecular Genomics Unit, Clinical Pathology Department, Medical Ain Shams Research Institute (MASRI), School of Medicine, Ain Shams University, Cairo 11566, Egypt
- Correspondence: (R.A.); (S.H.A.A.); (M.M.)
| | - Eman Khairy
- Medicinal Biochemistry and Molecular Biology Department, School of Medicine, Ain Shams University, Cairo 11566, Egypt;
| | - Maha Saad
- Biochemistry Department, Faculty of Medicine, Modern University for Technology and Information, Cairo 11382, Egypt;
| | - Naglaa El Touchy
- Department of Gastroentrology, Hepatology & Infectious Disease, Faculty of Medicine, Benha University, Benha 13518, Egypt;
| | - Mohamed Othman
- Gastroenterology and Hepatology Section, Baylor College of Medicine, Houston, TX 77030, USA;
| | - Marwa Matboli
- Medicinal Biochemistry and Molecular Biology Department, School of Medicine, Ain Shams University, Cairo 11566, Egypt;
- Correspondence: (R.A.); (S.H.A.A.); (M.M.)
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37
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Patra U, Müller S. A Tale of Usurpation and Subversion: SUMO-Dependent Integrity of Promyelocytic Leukemia Nuclear Bodies at the Crossroad of Infection and Immunity. Front Cell Dev Biol 2021; 9:696234. [PMID: 34513832 PMCID: PMC8430037 DOI: 10.3389/fcell.2021.696234] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 07/30/2021] [Indexed: 12/13/2022] Open
Abstract
Promyelocytic leukemia nuclear bodies (PML NBs) are multi-protein assemblies representing distinct sub-nuclear structures. As phase-separated molecular condensates, PML NBs exhibit liquid droplet-like consistency. A key organizer of the assembly and dynamics of PML NBs is the ubiquitin-like SUMO modification system. SUMO is covalently attached to PML and other core components of PML NBs thereby exhibiting a glue-like function by providing multivalent interactions with proteins containing SUMO interacting motifs (SIMs). PML NBs serve as the catalytic center for nuclear SUMOylation and SUMO-SIM interactions are essential for protein assembly within these structures. Importantly, however, formation of SUMO chains on PML and other PML NB-associated proteins triggers ubiquitylation and proteasomal degradation which coincide with disruption of these nuclear condensates. To date, a plethora of nuclear activities such as transcriptional and post-transcriptional regulation of gene expression, apoptosis, senescence, cell cycle control, DNA damage response, and DNA replication have been associated with PML NBs. Not surprisingly, therefore, SUMO-dependent PML NB integrity has been implicated in regulating many physiological processes including tumor suppression, metabolism, drug-resistance, development, cellular stemness, and anti-pathogen immune response. The interplay between PML NBs and viral infection is multifaceted. As a part of the cellular antiviral defense strategy, PML NB components are crucial restriction factors for many viruses and a mutual positive correlation has been found to exist between PML NBs and the interferon response. Viruses, in turn, have developed counterstrategies for disarming PML NB associated immune defense measures. On the other end of the spectrum, certain viruses are known to usurp specific PML NB components for successful replication and disruption of these sub-nuclear foci has recently been linked to the stimulation rather than curtailment of antiviral gene repertoire. Importantly, the ability of invading virions to manipulate the host SUMO modification machinery is essential for this interplay between PML NB integrity and viruses. Moreover, compelling evidence is emerging in favor of bacterial pathogens to negotiate with the SUMO system thereby modulating PML NB-directed intrinsic and innate immunity. In the current context, we will present an updated account of the dynamic intricacies between cellular PML NBs as the nuclear SUMO modification hotspots and immune regulatory mechanisms in response to viral and bacterial pathogens.
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Affiliation(s)
- Upayan Patra
- Institute of Biochemistry II, Faculty of Medicine, Goethe University, Frankfurt, Germany
| | - Stefan Müller
- Institute of Biochemistry II, Faculty of Medicine, Goethe University, Frankfurt, Germany
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Dagher T, Maslah N, Edmond V, Cassinat B, Vainchenker W, Giraudier S, Pasquier F, Verger E, Niwa-Kawakita M, Lallemand-Breitenbach V, Plo I, Kiladjian JJ, Villeval JL, de Thé H. JAK2V617F myeloproliferative neoplasm eradication by a novel interferon/arsenic therapy involves PML. J Exp Med 2021; 218:211476. [PMID: 33075130 PMCID: PMC7579737 DOI: 10.1084/jem.20201268] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/31/2020] [Accepted: 09/09/2020] [Indexed: 12/22/2022] Open
Abstract
Interferon α (IFNα) is used to treat JAK2V617F-driven myeloproliferative neoplasms (MPNs) but rarely clears the disease. We investigated the IFNα mechanism of action focusing on PML, an interferon target and key senescence gene whose targeting by arsenic trioxide (ATO) drives eradication of acute promyelocytic leukemia. ATO sharply potentiated IFNα-induced growth suppression of JAK2V617F patient or mouse hematopoietic progenitors, which required PML and was associated with features of senescence. In a mouse MPN model, combining ATO with IFNα enhanced and accelerated responses, eradicating MPN in most mice by targeting disease-initiating cells. These results predict potent clinical efficacy of the IFNα+ATO combination in patients and identify PML as a major effector of therapy, even in malignancies with an intact PML gene.
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Affiliation(s)
- Tracy Dagher
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1287, Gustave Roussy, Villejuif, France.,Université Paris-Saclay, Gustave Roussy, Villejuif, France.,Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Nabih Maslah
- Université de Paris, INSERM UMR-S1131, Institut de Recherche Saint-Louis (IRSL), Hôpital Saint-Louis, Paris, France.,Service de Biologie Cellulaire, Assistance Publique Hôpitaux de Paris (APHP), Hôpital Saint-Louis, Paris, France
| | - Valérie Edmond
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1287, Gustave Roussy, Villejuif, France.,Université Paris-Saclay, Gustave Roussy, Villejuif, France.,Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Bruno Cassinat
- Laboratoire d'Excellence GR-Ex, Paris, France.,Université de Paris, INSERM UMR-S1131, Institut de Recherche Saint-Louis (IRSL), Hôpital Saint-Louis, Paris, France.,Service de Biologie Cellulaire, Assistance Publique Hôpitaux de Paris (APHP), Hôpital Saint-Louis, Paris, France
| | - William Vainchenker
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1287, Gustave Roussy, Villejuif, France.,Université Paris-Saclay, Gustave Roussy, Villejuif, France.,Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Stéphane Giraudier
- Université de Paris, INSERM UMR-S1131, Institut de Recherche Saint-Louis (IRSL), Hôpital Saint-Louis, Paris, France.,Service de Biologie Cellulaire, Assistance Publique Hôpitaux de Paris (APHP), Hôpital Saint-Louis, Paris, France
| | - Florence Pasquier
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1287, Gustave Roussy, Villejuif, France.,Université Paris-Saclay, Gustave Roussy, Villejuif, France.,Département d'Hématologie, Gustave Roussy, Villejuif, France
| | - Emmanuelle Verger
- Université de Paris, INSERM UMR-S1131, Institut de Recherche Saint-Louis (IRSL), Hôpital Saint-Louis, Paris, France.,Service de Biologie Cellulaire, Assistance Publique Hôpitaux de Paris (APHP), Hôpital Saint-Louis, Paris, France
| | - Michiko Niwa-Kawakita
- INSERM U944, Centre National de la Recherche Scientifique (CNRS) UMR7212, IRSL, Hôpital Saint-Louis, Paris, France.,Collège de France, Paris Sciences et Lettres Research University, INSERM U1050, CNRS UMR7241, Paris, France
| | - Valérie Lallemand-Breitenbach
- INSERM U944, Centre National de la Recherche Scientifique (CNRS) UMR7212, IRSL, Hôpital Saint-Louis, Paris, France.,Collège de France, Paris Sciences et Lettres Research University, INSERM U1050, CNRS UMR7241, Paris, France
| | - Isabelle Plo
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1287, Gustave Roussy, Villejuif, France.,Université Paris-Saclay, Gustave Roussy, Villejuif, France.,Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Jean-Jacques Kiladjian
- Laboratoire d'Excellence GR-Ex, Paris, France.,Université de Paris, INSERM UMR-S1131, Institut de Recherche Saint-Louis (IRSL), Hôpital Saint-Louis, Paris, France.,Centre d'Investigations Cliniques, APHP, Hôpital Saint-Louis, Paris, France
| | - Jean-Luc Villeval
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1287, Gustave Roussy, Villejuif, France.,Université Paris-Saclay, Gustave Roussy, Villejuif, France.,Gustave Roussy, Villejuif, France.,Laboratoire d'Excellence GR-Ex, Paris, France
| | - Hugues de Thé
- INSERM U944, Centre National de la Recherche Scientifique (CNRS) UMR7212, IRSL, Hôpital Saint-Louis, Paris, France.,Collège de France, Paris Sciences et Lettres Research University, INSERM U1050, CNRS UMR7241, Paris, France.,Service de Biochimie, APHP, Hôpital Saint-Louis, Paris, France
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39
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Quantitative Proteomics and Phosphoproteomics Reveal TNF-α-Mediated Protein Functions in Hepatocytes. Molecules 2021; 26:molecules26185472. [PMID: 34576943 PMCID: PMC8464716 DOI: 10.3390/molecules26185472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 09/02/2021] [Accepted: 09/06/2021] [Indexed: 11/18/2022] Open
Abstract
Increased secretion of proinflammatory cytokines, such as tumor necrosis factor-alpha (TNFα), is often associated with adipose tissue dysregulation, which often accompanies obesity. High levels of TNFα have been linked to the development of insulin resistance in several tissues and organs, including skeletal muscle and the liver. In this study, we examined the complex regulatory roles of TNFα in murine hepatocytes utilizing a combination of global proteomic and phosphoproteomic analyses. Our results show that TNFα promotes extensive changes not only of protein levels, but also the dynamics of their downstream phosphorylation signaling. We provide evidence that TNFα induces DNA replication and promotes G1/S transition through activation of the MAPK pathway. Our data also highlight several other novel proteins, many of which are regulated by phosphorylation and play a role in the progression and development of insulin resistance in hepatocytes.
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40
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Delbarre E, Janicki SM. Modulation of H3.3 chromatin assembly by PML: A way to regulate epigenetic inheritance. Bioessays 2021; 43:e2100038. [PMID: 34423467 DOI: 10.1002/bies.202100038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 08/04/2021] [Accepted: 08/06/2021] [Indexed: 12/15/2022]
Abstract
Although the promyelocytic leukemia (PML) protein is renowned for regulating a wide range of cellular processes and as an essential component of PML nuclear bodies (PML-NBs), the mechanisms through which it exerts its broad physiological impact are far from fully elucidated. Here, we review recent studies supporting an emerging view that PML's pleiotropic effects derive, at least partially, from its role in regulating histone H3.3 chromatin assembly, a critical epigenetic mechanism. These studies suggest that PML maintains heterochromatin organization by restraining H3.3 incorporation. Examination of PML's contribution to H3.3 chromatin assembly in the context of the cell cycle and PML-NB assembly suggests that PML represses heterochromatic H3.3 deposition during S phase and that transcription and SUMOylation regulate PML's recruitment to heterochromatin. Elucidating PML' s contributions to H3.3-mediated epigenetic regulation will provide insight into PML's expansive influence on cellular physiology and open new avenues for studying oncogenesis linked to PML malfunction.
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Affiliation(s)
- Erwan Delbarre
- Faculty of Health Sciences, OsloMet-Oslo Metropolitan University, Oslo, Norway
| | - Susan M Janicki
- Drexel University Thomas R. Kline School of Law, Philadelphia, Pennsylvania, USA
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41
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Gene Transcription as a Therapeutic Target in Leukemia. Int J Mol Sci 2021; 22:ijms22147340. [PMID: 34298959 PMCID: PMC8304797 DOI: 10.3390/ijms22147340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/02/2021] [Accepted: 07/05/2021] [Indexed: 12/11/2022] Open
Abstract
Blood malignancies often arise from undifferentiated hematopoietic stem cells or partially differentiated stem-like cells. A tight balance of multipotency and differentiation, cell division, and quiescence underlying normal hematopoiesis requires a special program governed by the transcriptional machinery. Acquisition of drug resistance by tumor cells also involves reprogramming of their transcriptional landscape. Limiting tumor cell plasticity by disabling reprogramming of the gene transcription is a promising strategy for improvement of treatment outcomes. Herein, we review the molecular mechanisms of action of transcription-targeted drugs in hematological malignancies (largely in leukemia) with particular respect to the results of clinical trials.
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42
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Meng X, Chen Y, Macip S, Leppard K. PML-II regulates ERK and AKT signal activation and IFNα-induced cell death. Cell Commun Signal 2021; 19:70. [PMID: 34215258 PMCID: PMC8252201 DOI: 10.1186/s12964-021-00756-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 06/03/2021] [Indexed: 11/23/2022] Open
Abstract
Background The requirement of promyelocytic leukaemia protein (PML) in interferon (IFN)-induced cell apoptosis is well-established. However, the exact mechanisms by which the multiple isoforms of PML protein participate in this process remain not well-understood. We previously demonstrated that PML isoform II (PML-II) positively regulates induced gene expression during a type I IFN response and evaluate here how PML-II contributes to IFNα-induced cell death. Methods HeLa cells were transiently depleted of PML-II by siRNA treatment and the response of these cells to treatment with IFNα assessed by molecular assays of mRNA and proteins associated with IFN and apoptosis responses. Results In HeLa cells, death during IFNα stimulation was reduced by prior PML-II depletion. PML-II removal also considerably decreased the induced expression of pro-apoptotic ISGs such as ISG54 (IFIT2), and substantially impaired or prevented expression of PUMA and TRAIL, proteins that are associated with the intrinsic and extrinsic apoptotic pathways respectively. Thirdly, PML-II depletion enhanced ERK and AKT pro-survival signaling activation suggesting that PML-II normally suppresses signaling via these pathways, and that lack of PML-II hence led to greater than normal activation of AKT signaling upon IFNα stimulation and consequently increased resistance to IFNα-induced apoptosis. Conclusions The positive contribution of PML-II to the expression of various IFNα-induced pro-apoptotic proteins and its inhibition of pro-survival signaling together provide a mechanistic explanation for reduced apoptosis under conditions of PML deficiency and may account for at least part of the role of PML as a tumor suppressor gene. Video Abstract
Supplementary Information The online version contains supplementary material available at 10.1186/s12964-021-00756-5.
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Affiliation(s)
- Xueqiong Meng
- School of Basic Medicine, Henan University of Science and Technology, Luoyang, China.,School of Life Sciences, University of Warwick, Coventry, UK
| | - Yixiang Chen
- School of Basic Medicine, Henan University of Science and Technology, Luoyang, China.,Henan International Joint Laboratory of Thrombosis and Hemostasis, Luoyang, China.,Mechanisms of Cancer and Aging Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, UK
| | - Salvador Macip
- Mechanisms of Cancer and Aging Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, UK.,FoodLab, Faculty of Health Sciences, Universitat Oberta de Catalunya, Barcelona, Spain
| | - Keith Leppard
- School of Life Sciences, University of Warwick, Coventry, UK.
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43
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Delaunay K, Sellam A, Dinet V, Moulin A, Zhao M, Gelizé E, Canonica J, Naud MC, Crisanti-Lassiaz P, Behar-Cohen F. Meteorin Is a Novel Therapeutic Target for Wet Age-Related Macular Degeneration. J Clin Med 2021; 10:jcm10132973. [PMID: 34279457 PMCID: PMC8268911 DOI: 10.3390/jcm10132973] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/27/2021] [Accepted: 06/28/2021] [Indexed: 12/13/2022] Open
Abstract
The aim of this study was to evaluate the potential anti-angiogenic effect of MTRN (meteorin) in the laser-induced CNV rat model and explore its mechanisms of action. MTRN, thrompospondin-1, glial cell markers (GFAP, vimentin), and phalloidin were immuno-stained in non-human primate flat-mounted retinas and human retina cross sections. The effect of MTRN at different doses and time points was evaluated on laser-induced CNV at 14 days using in vivo fluorescein angiography and ex vivo quantification of CNV. A pan transcriptomic analysis of the retina and the RPE/choroid complex was used to explore MTRN effects mechanisms. In human retina, MTRN is enriched in the macula, expressed in and secreted by glial cells, and located in photoreceptor cells, including in nuclear bodies. Intravitreal MTRN administered preventively reduced CNV angiographic scores and CNV size in a dose-dependent manner. The highest dose, administered at day 7, also reduced CNV. MTRN, which is regulated by mineralocorticoid receptor modulators in the rat retina, regulates pathways associated with angiogenesis, oxidative stress, and neuroprotection. MTRN is a potential novel therapeutic candidate protein for wet AMD.
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Affiliation(s)
- Kimberley Delaunay
- Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, INSERM, From Physiopathology of Retinal Diseases to Clinical Advances, 75006 Paris, France; (K.D.); (A.S.); (V.D.); (M.Z.); (E.G.); (J.C.); (M.-C.N.); (P.C.-L.)
| | - Alexandre Sellam
- Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, INSERM, From Physiopathology of Retinal Diseases to Clinical Advances, 75006 Paris, France; (K.D.); (A.S.); (V.D.); (M.Z.); (E.G.); (J.C.); (M.-C.N.); (P.C.-L.)
| | - Virginie Dinet
- Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, INSERM, From Physiopathology of Retinal Diseases to Clinical Advances, 75006 Paris, France; (K.D.); (A.S.); (V.D.); (M.Z.); (E.G.); (J.C.); (M.-C.N.); (P.C.-L.)
- Biology of Cardiovascular Diseases, INSERM U1034, Pessac, Université de Bordeaux, 33000 Bordeaux, France
| | - Alexandre Moulin
- Department of Ophthalmology, University of Lausanne, Jules Gonin Eye Hospital, Fondation Asile des Aveugles, 1000 Lausanne, Switzerland;
| | - Min Zhao
- Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, INSERM, From Physiopathology of Retinal Diseases to Clinical Advances, 75006 Paris, France; (K.D.); (A.S.); (V.D.); (M.Z.); (E.G.); (J.C.); (M.-C.N.); (P.C.-L.)
| | - Emmanuelle Gelizé
- Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, INSERM, From Physiopathology of Retinal Diseases to Clinical Advances, 75006 Paris, France; (K.D.); (A.S.); (V.D.); (M.Z.); (E.G.); (J.C.); (M.-C.N.); (P.C.-L.)
| | - Jérémie Canonica
- Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, INSERM, From Physiopathology of Retinal Diseases to Clinical Advances, 75006 Paris, France; (K.D.); (A.S.); (V.D.); (M.Z.); (E.G.); (J.C.); (M.-C.N.); (P.C.-L.)
- Department of Ophthalmology, University of Lausanne, Jules Gonin Eye Hospital, Fondation Asile des Aveugles, 1000 Lausanne, Switzerland;
| | - Marie-Christine Naud
- Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, INSERM, From Physiopathology of Retinal Diseases to Clinical Advances, 75006 Paris, France; (K.D.); (A.S.); (V.D.); (M.Z.); (E.G.); (J.C.); (M.-C.N.); (P.C.-L.)
| | - Patricia Crisanti-Lassiaz
- Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, INSERM, From Physiopathology of Retinal Diseases to Clinical Advances, 75006 Paris, France; (K.D.); (A.S.); (V.D.); (M.Z.); (E.G.); (J.C.); (M.-C.N.); (P.C.-L.)
| | - Francine Behar-Cohen
- Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, INSERM, From Physiopathology of Retinal Diseases to Clinical Advances, 75006 Paris, France; (K.D.); (A.S.); (V.D.); (M.Z.); (E.G.); (J.C.); (M.-C.N.); (P.C.-L.)
- Hôpital Cochin Ophthalmopole, Assistance Publique—Hôpitaux de Paris, 75014 Paris, France
- INSERM UMR_S 1138, Team 17: From Physiopathology of Retinal Diseases to Clinical Advances, Centre de Recherche des Cordeliers, 75006 Paris, France
- Correspondence:
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44
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Promyelocytic leukemia protein: an atherosclerosis suppressor protein? Clin Sci (Lond) 2021; 135:1557-1561. [PMID: 34192313 DOI: 10.1042/cs20210314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/26/2021] [Accepted: 05/28/2021] [Indexed: 11/17/2022]
Abstract
As many as 70% of cells in atherosclerotic plaque are vascular smooth muscle cell (VSMC) in origin, and pathways and proteins which regulate VSMC migration, proliferation, and phenotype modulation represent novel targets for rational drug design to reduce atherosclerotic vascular disease. In this volume of Clinical Science, Karle et al. demonstrate that tumor suppressor, promyelocytic leukemia protein (PML) plays an important role in regulation of VSMC phenotype and response to inflammatory stimuli (Clin Sci (2021) 135(7), 887-905; DOI: 10.1042/CS20201399). This important work demonstrates that PML, previously unrecognized as a participant in development of atherosclerosis, may represent a novel target for anti-atherosclerotic therapeutic modalities.
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45
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Tampakaki M, Oraiopoulou ME, Tzamali E, Tzedakis G, Makatounakis T, Zacharakis G, Papamatheakis J, Sakkalis V. PML Differentially Regulates Growth and Invasion in Brain Cancer. Int J Mol Sci 2021; 22:ijms22126289. [PMID: 34208139 PMCID: PMC8230868 DOI: 10.3390/ijms22126289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 12/20/2022] Open
Abstract
Glioblastoma is the most malignant brain tumor among adults. Despite multimodality treatment, it remains incurable, mainly because of its extensive heterogeneity and infiltration in the brain parenchyma. Recent evidence indicates dysregulation of the expression of the Promyelocytic Leukemia Protein (PML) in primary Glioblastoma samples. PML is implicated in various ways in cancer biology. In the brain, PML participates in the physiological migration of the neural progenitor cells, which have been hypothesized to serve as the cell of origin of Glioblastoma. The role of PML in Glioblastoma progression has recently gained attention due to its controversial effects in overall Glioblastoma evolution. In this work, we studied the role of PML in Glioblastoma pathophysiology using the U87MG cell line. We genetically modified the cells to conditionally overexpress the PML isoform IV and we focused on its dual role in tumor growth and invasive capacity. Furthermore, we targeted a PML action mediator, the Enhancer of Zeste Homolog 2 (EZH2), via the inhibitory drug DZNeP. We present a combined in vitro–in silico approach, that utilizes both 2D and 3D cultures and cancer-predictive computational algorithms, in order to differentiate and interpret the observed biological results. Our overall findings indicate that PML regulates growth and invasion through distinct cellular mechanisms. In particular, PML overexpression suppresses cell proliferation, while it maintains the invasive capacity of the U87MG Glioblastoma cells and, upon inhibition of the PML-EZH2 pathway, the invasion is drastically eliminated. Our in silico simulations suggest that the underlying mechanism of PML-driven Glioblastoma physiology regulates invasion by differential modulation of the cell-to-cell adhesive and diffusive capacity of the cells. Elucidating further the role of PML in Glioblastoma biology could set PML as a potential molecular biomarker of the tumor progression and its mediated pathway as a therapeutic target, aiming at inhibiting cell growth and potentially clonal evolution regarding their proliferative and/or invasive phenotype within the heterogeneous tumor mass.
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Affiliation(s)
- Maria Tampakaki
- Institute of Computer Science, Foundation for Research and Technology-Hellas, 70013 Heraklion, Greece; (M.T.); (M.-E.O.); (E.T.); (G.T.)
- School of Medicine, University of Crete, 71003 Heraklion, Greece
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 70013 Heraklion, Greece
| | - Mariam-Eleni Oraiopoulou
- Institute of Computer Science, Foundation for Research and Technology-Hellas, 70013 Heraklion, Greece; (M.T.); (M.-E.O.); (E.T.); (G.T.)
| | - Eleftheria Tzamali
- Institute of Computer Science, Foundation for Research and Technology-Hellas, 70013 Heraklion, Greece; (M.T.); (M.-E.O.); (E.T.); (G.T.)
| | - Giorgos Tzedakis
- Institute of Computer Science, Foundation for Research and Technology-Hellas, 70013 Heraklion, Greece; (M.T.); (M.-E.O.); (E.T.); (G.T.)
| | - Takis Makatounakis
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, 70013 Heraklion, Greece;
| | - Giannis Zacharakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 70013 Heraklion, Greece
- Correspondence: (G.Z.); (J.P.); (V.S.)
| | - Joseph Papamatheakis
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, 70013 Heraklion, Greece;
- Department of Biology, University of Crete, 70013 Heraklion, Greece
- Correspondence: (G.Z.); (J.P.); (V.S.)
| | - Vangelis Sakkalis
- Institute of Computer Science, Foundation for Research and Technology-Hellas, 70013 Heraklion, Greece; (M.T.); (M.-E.O.); (E.T.); (G.T.)
- Correspondence: (G.Z.); (J.P.); (V.S.)
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Yan HY, Wang HQ, Zhong M, Wu S, Yang L, Li K, Li YH. PML Suppresses Influenza Virus Replication by Promoting FBXW7 Expression. Virol Sin 2021; 36:1154-1164. [PMID: 34046815 DOI: 10.1007/s12250-021-00399-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 03/29/2021] [Indexed: 12/16/2022] Open
Abstract
Influenza A viruses (IAV) are responsible for seasonal flu epidemics, which can lead to high morbidity and mortality each year. Like other viruses, influenza virus can hijack host cellular machinery for its replication. Host cells have evolved diverse cellular defense to resist the invasion of viruses. As the main components of promyelocytic leukemia protein nuclear bodies (PML-NBs), PML can inhibit the replication of many medically important viruses including IAV. However, the mechanism of PML against IAV is unclear. In the present study, we found PML was induced in response to IAV infection and ectopic expression of PML could inhibit IAV replication, whereas knockdown of endogenous PML expression could enhance IAV replication. Further studies showed that PML increased the expression of FBXW7 by inhibiting its K48-linked ubiquitination and enhanced the interaction between FBXW7 and SHP2, which negatively regulated IAV replication during infection. Moreover, PML stabilized RIG-I to promote the production of type I IFN. Collectively, these data indicated that PML inhibited IAV replication by enhancing FBXW7 expression in the antiviral immunity against influenza virus and extended the mechanism of PML in antiviral immunity.
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Affiliation(s)
- Hai-Yan Yan
- CAMS Key Laboratory of Antiviral Drug Research, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.,Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Hui-Qiang Wang
- CAMS Key Laboratory of Antiviral Drug Research, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.,Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Ming Zhong
- CAMS Key Laboratory of Antiviral Drug Research, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.,Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Shuo Wu
- CAMS Key Laboratory of Antiviral Drug Research, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.,Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Lu Yang
- CAMS Key Laboratory of Antiviral Drug Research, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.,Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Ke Li
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Science, Beijing, 100050, China.
| | - Yu-Huan Li
- CAMS Key Laboratory of Antiviral Drug Research, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China. .,Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.
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47
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Stability of Smyd1 in endothelial cells is controlled by PML-dependent SUMOylation upon cytokine stimulation. Biochem J 2021; 478:217-234. [PMID: 33241844 DOI: 10.1042/bcj20200603] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/18/2020] [Accepted: 11/25/2020] [Indexed: 11/17/2022]
Abstract
Smyd1 is an epigenetic modulator of gene expression that has been well-characterized in muscle cells. It was recently reported that Smyd1 levels are modulated by inflammatory processes. Since inflammation affects the vascular endothelium, this study aimed to characterize Smyd1 expression in endothelial cells. We detected Smyd1 in human endothelial cells (HUVEC and EA.hy926 cells), where the protein was largely localized in PML nuclear bodies (PML-NBs). By transfection of EA.hy926 cells with expression vectors encoding Smyd1, PML, SUMO1, active or mutant forms of the SUMO protease SuPr1 and/or the SUMO-conjugation enzyme UBC9, as well as Smyd1- or PML-specific siRNAs, in the presence or absence of the translation blocker cycloheximide or the proteasome-inhibitor MG132, and supported by computational modeling, we show that Smyd1 is SUMOylated in a PML-dependent manner and thereby addressed for degradation in proteasomes. Furthermore, transfection with Smyd1-encoding vectors led to PML up-regulation at the mRNA level, while PML transfection lowered Smyd1 protein stability. Incubation of EA.hy926 cells with the pro-inflammatory cytokine TNF-α resulted in a constant increase in Smyd1 mRNA and protein over 24 h, while incubation with IFN-γ induced a transient increase in Smyd1 expression, which peaked at 6 h and decreased to control values within 24 h. The IFN-γ-induced increase in Smyd1 was accompanied by more Smyd1 SUMOylation and more/larger PML-NBs. In conclusion, our data indicate that in endothelial cells, Smyd1 levels are regulated through a negative feedback mechanism based on SUMOylation and PML availability. This molecular control loop is stimulated by various cytokines.
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48
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Promyelocytic leukemia protein promotes the phenotypic switch of smooth muscle cells in atherosclerotic plaques of human coronary arteries. Clin Sci (Lond) 2021; 135:887-905. [PMID: 33764440 DOI: 10.1042/cs20201399] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 03/23/2021] [Accepted: 03/24/2021] [Indexed: 12/31/2022]
Abstract
Promyelocytic leukemia protein (PML) is a constitutive component of PML nuclear bodies (PML-NBs), which function as stress-regulated SUMOylation factories. Since PML can also act as a regulator of the inflammatory and fibroproliferative responses characteristic of atherosclerosis, we investigated whether PML is implicated in this disease. Immunoblotting, ELISA and immunohistochemistry showed a stronger expression of PML in segments of human atherosclerotic coronary arteries and sections compared with non-atherosclerotic ones. In particular, PML was concentrated in PML-NBs from α-smooth muscle actin (α-SMA)-immunoreactive cells in plaque areas. To identify possible functional consequences of PML-accumulation in this cell type, differentiated human coronary artery smooth muscle cells (dHCASMCs) were transfected with a vector containing the intact PML-gene. These PML-transfected dHCASMCs showed higher levels of small ubiquitin-like modifier (SUMO)-1-dependent SUMOylated proteins, but lower levels of markers for smooth muscle cell (SMC) differentiation and revealed more proliferation and migration activities than dHCASMCs transfected with the vector lacking a specific gene insert or with the vector containing a mutated PML-gene coding for a PML-form without SUMOylation activity. When dHCASMCs were incubated with different cytokines, higher PML-levels were observed only after interferon γ (IFN-γ) stimulation, while the expression of differentiation markers was lower. However, these phenotypic changes were not observed in dHCASMCs treated with small interfering RNA (siRNA) suppressing PML-expression prior to IFN-γ stimulation. Taken together, our results imply that PML is a previously unknown functional factor in the molecular cascades associated with the pathogenesis of atherosclerosis and is positioned in vascular SMCs (VSMCs) between upstream IFN-γ activation and downstream SUMOylation.
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49
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Wang N, Wang C, Zhao H, He Y, Lan B, Sun L, Gao Y. The MAMs Structure and Its Role in Cell Death. Cells 2021; 10:cells10030657. [PMID: 33809551 PMCID: PMC7999768 DOI: 10.3390/cells10030657] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 02/06/2023] Open
Abstract
The maintenance of cellular homeostasis involves the participation of multiple organelles. These organelles are associated in space and time, and either cooperate or antagonize each other with regards to cell function. Crosstalk between organelles has become a significant topic in research over recent decades. We believe that signal transduction between organelles, especially the endoplasmic reticulum (ER) and mitochondria, is a factor that can influence the cell fate. As the cellular center for protein folding and modification, the endoplasmic reticulum can influence a range of physiological processes by regulating the quantity and quality of proteins. Mitochondria, as the cellular "energy factory," are also involved in cell death processes. Some researchers regard the ER as the sensor of cellular stress and the mitochondria as an important actuator of the stress response. The scientific community now believe that bidirectional communication between the ER and the mitochondria can influence cell death. Recent studies revealed that the death signals can shuttle between the two organelles. Mitochondria-associated membranes (MAMs) play a vital role in the complex crosstalk between the ER and mitochondria. MAMs are known to play an important role in lipid synthesis, the regulation of Ca2+ homeostasis, the coordination of ER-mitochondrial function, and the transduction of death signals between the ER and the mitochondria. Clarifying the structure and function of MAMs will provide new concepts for studying the pathological mechanisms associated with neurodegenerative diseases, aging, and cancers. Here, we review the recent studies of the structure and function of MAMs and its roles involved in cell death, especially in apoptosis.
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Affiliation(s)
- Nan Wang
- China Japan Union Hospital, Jilin University, Changchun 130031, China; (N.W.); (C.W.); (H.Z.); (Y.H.); (B.L.)
| | - Chong Wang
- China Japan Union Hospital, Jilin University, Changchun 130031, China; (N.W.); (C.W.); (H.Z.); (Y.H.); (B.L.)
| | - Hongyang Zhao
- China Japan Union Hospital, Jilin University, Changchun 130031, China; (N.W.); (C.W.); (H.Z.); (Y.H.); (B.L.)
| | - Yichun He
- China Japan Union Hospital, Jilin University, Changchun 130031, China; (N.W.); (C.W.); (H.Z.); (Y.H.); (B.L.)
| | - Beiwu Lan
- China Japan Union Hospital, Jilin University, Changchun 130031, China; (N.W.); (C.W.); (H.Z.); (Y.H.); (B.L.)
| | - Liankun Sun
- Key Laboratory of Pathobiology, Ministry of Education, Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun 130012, China
- Correspondence: (L.S.); (Y.G.)
| | - Yufei Gao
- China Japan Union Hospital, Jilin University, Changchun 130031, China; (N.W.); (C.W.); (H.Z.); (Y.H.); (B.L.)
- Correspondence: (L.S.); (Y.G.)
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Raghunandan M, Geelen D, Majerova E, Decottignies A. NHP2 downregulation counteracts hTR-mediated activation of the DNA damage response at ALT telomeres. EMBO J 2021; 40:e106336. [PMID: 33595114 DOI: 10.15252/embj.2020106336] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 11/09/2022] Open
Abstract
About 10% of cancer cells employ the "alternative lengthening of telomeres" (ALT) pathway instead of re-activating the hTERT subunit of human telomerase. The hTR RNA subunit is also abnormally silenced in some ALT+ cells not expressing hTERT, suggesting a possible negative non-canonical impact of hTR on ALT. Indeed, we show that ectopically expressed hTR reduces phosphorylation of ssDNA-binding protein RPA (p-RPAS33 ) at ALT telomeres by promoting the hnRNPA1- and DNA-PK-dependent depletion of RPA. The resulting defective ATR checkpoint signaling at telomeres impairs recruitment of the homologous recombination protein, RAD51. This induces ALT telomere fragility, increases POLD3-dependent C-circle production, and promotes the recruitment of the DNA damage marker 53BP1. In ALT+ cells that naturally retain hTR expression, NHP2 H/ACA ribonucleoprotein levels are downregulated, likely in order to restrain DNA damage response (DDR) activation at telomeres through reduced 53BP1 recruitment. This unexpected role of NHP2 is independent from hTR's non-canonical function in modulating telomeric p-RPAS33 . Collectively, our study shines new light on the interference between telomerase- and ALT-dependent pathways and unravels a crucial role for hTR and NHP2 in DDR regulation at ALT telomeres.
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Affiliation(s)
- Maya Raghunandan
- Genetic and Epigenetic Alterations of Genomes, de Duve Institute, Faculty of Pharmacy and Biomedical Sciences, Université catholique de Louvain, Brussels, Belgium
| | - Dan Geelen
- Genetic and Epigenetic Alterations of Genomes, de Duve Institute, Faculty of Pharmacy and Biomedical Sciences, Université catholique de Louvain, Brussels, Belgium
| | - Eva Majerova
- Genetic and Epigenetic Alterations of Genomes, de Duve Institute, Faculty of Pharmacy and Biomedical Sciences, Université catholique de Louvain, Brussels, Belgium
| | - Anabelle Decottignies
- Genetic and Epigenetic Alterations of Genomes, de Duve Institute, Faculty of Pharmacy and Biomedical Sciences, Université catholique de Louvain, Brussels, Belgium
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