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Ayten H, Toker P, Turan Duman G, Olgun ÇE, Demiralay ÖD, Bınarcı B, Güpür G, Yaşar P, Akman HB, Haberkant P, Muyan M. CXXC5 is a ubiquitinated protein and is degraded by the ubiquitin-proteasome pathway. Protein Sci 2025; 34:e70140. [PMID: 40371716 PMCID: PMC12079423 DOI: 10.1002/pro.70140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2025] [Revised: 04/08/2025] [Accepted: 04/10/2025] [Indexed: 05/16/2025]
Abstract
CXXC5, as a member of the zinc-finger CXXC family proteins, interacts with unmodified CpG dinucleotides to modulate the expression of genes involved in cellular proliferation, differentiation, and death in physiology and pathophysiology. Various signaling pathways, including mitogenic 17β-estradiol (E2), contribute to the expression and synthesis of CXXC5. However, how signaling pathways modulate protein levels of CXXC5 in cells is largely unknown. We previously reported that some key regulators, including retinoblastoma 1 and E74-like ETS transcription factor 1, of the G1 to S phase transitions are involved in the expression of CXXC5 in estrogen-responsive MCF-7 cells, derived from a breast adenocarcinoma. We, therefore, predict that the synthesis of CXXC5 is regulated in a cell cycle-dependent manner. We report here that although E2 in synchronized MCF-7 cells augments both transcription and synthesis of CXXC5 in the G1 phase, CXXC5 protein levels are primarily mediated by ubiquitination independently of cell cycle phases. Utilizing the bioUbiquitination approach, which is based on cellular biotinylation of ubiquitin, in HEK293FT cells derived from immortalized human embryonic kidney cells, followed by sequential immunoprecipitation coupled mass spectrometry analyses, we identified ubiquitinated lysine residues of CXXC5. We show in both MCF-7 and HEK293FT cells that the ubiquitinated lysine residues contribute to the degradation of CXXC5 through the ubiquitin-proteasome pathway.
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Affiliation(s)
- Hazal Ayten
- Department of Biological SciencesMiddle East Technical UniversityÇankaya‐AnkaraTürkiye
| | - Pelin Toker
- Department of Biological SciencesMiddle East Technical UniversityÇankaya‐AnkaraTürkiye
| | - Gizem Turan Duman
- Department of Biological SciencesMiddle East Technical UniversityÇankaya‐AnkaraTürkiye
| | - Çağla Ece Olgun
- Department of Biological SciencesMiddle East Technical UniversityÇankaya‐AnkaraTürkiye
| | - Öykü Deniz Demiralay
- Department of Biological SciencesMiddle East Technical UniversityÇankaya‐AnkaraTürkiye
- Present address:
Paul Langerhans Institute Dresden (PLID) of Helmholtz Center Munich at the University Clinic Carl Gustav Carus of TU Dresden, Helmholtz Zentrum MünchenGerman Research Center for Environmental HealthNeuherbergGermany
| | - Büşra Bınarcı
- Department of Biological SciencesMiddle East Technical UniversityÇankaya‐AnkaraTürkiye
| | - Gizem Güpür
- Department of Biological SciencesMiddle East Technical UniversityÇankaya‐AnkaraTürkiye
| | - Pelin Yaşar
- Department of Biological SciencesMiddle East Technical UniversityÇankaya‐AnkaraTürkiye
- Present address:
Epigenetics and Stem Cell Biology Laboratory, Single Cell Dynamics GroupNational Institute of Environmental Health SciencesResearch Triangle ParkNorth CarolinaUSA
| | - Hesna Begüm Akman
- Department of Biological SciencesMiddle East Technical UniversityÇankaya‐AnkaraTürkiye
| | - Per Haberkant
- Proteomics Core FacilityEMBL HeidelbergHeidelbergGermany
| | - Mesut Muyan
- Department of Biological SciencesMiddle East Technical UniversityÇankaya‐AnkaraTürkiye
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Li J, Wu Y, Zhang D, Zhang Z, Li S, Cheng X, Chen L, Zhou G, Yuan C. The Roles of Cytoplasmic Polyadenylation Element Binding Protein 1 in Tumorigenesis. Mini Rev Med Chem 2024; 24:2008-2018. [PMID: 38879767 DOI: 10.2174/0113895575293544240605112838] [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: 12/22/2023] [Revised: 03/25/2024] [Accepted: 04/03/2024] [Indexed: 10/25/2024]
Abstract
BACKGROUND CPEB1 is an alternative polyadenylation binding protein that promotes or suppresses the expression of related mRNAs and proteins by binding to a highly conserved Cytoplasmic Polyadenylation Element (CPE) in the mRNAs 3'UTR. It is found to express abnormally in multiple tumors and affect tumorigenesis through many pathways. This review summarizes the functions and mechanisms of CPEB1 in a variety of cancers and suggests new directions for future related treatments. METHODS A total of 95 articles were eligible for inclusion based on the year, quality of the research, and the strength of association with CPEB1. In this review, current research about how CPEB1 affects the initiation and progression of glioblastoma, breast cancer, hepatocellular carcinoma, gastric cancer, colorectal cancer, non-small cell lung cancer, prostate cancer, and melanoma are dissected, and the biomedical functions and mechanisms are summarized. RESULTS CPEB1 mostly presents as a tumor suppressor for breast cancer, endometrial carcinoma, hepatocellular carcinoma, non-small cell lung cancer, prostate cancer, and melanoma. However, for glioblastoma, gastric cancer, and colorectal cancer, CPEB1 exhibts two opposing properties of tumorigenesis, either promoting or inhibiting it. CONCLUSION CPEB1 is likely to serve as a target and dynamic detection index or prognostic indicator for its function of apoptosis, activity, proliferation, migration, invasion, stemness, drug resistance, and even ferroptosis in various cancers.
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Affiliation(s)
- JiaYi Li
- Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University
- College of Basic Medical Science, China Three Gorges University, Yichang 443002, China
- Third-grade Pharmacological Laboratory on Traditional Chinese Medicine, State Administration of Traditional Chinese Medicine, China Three Gorges University, China
| | - Yinxin Wu
- Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University
- College of Basic Medical Science, China Three Gorges University, Yichang 443002, China
- Third-grade Pharmacological Laboratory on Traditional Chinese Medicine, State Administration of Traditional Chinese Medicine, China Three Gorges University, China
| | - Dingyin Zhang
- Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University
- College of Basic Medical Science, China Three Gorges University, Yichang 443002, China
- Third-grade Pharmacological Laboratory on Traditional Chinese Medicine, State Administration of Traditional Chinese Medicine, China Three Gorges University, China
| | - Ziyan Zhang
- Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University
- College of Basic Medical Science, China Three Gorges University, Yichang 443002, China
- Third-grade Pharmacological Laboratory on Traditional Chinese Medicine, State Administration of Traditional Chinese Medicine, China Three Gorges University, China
| | - Songqiang Li
- Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University
- College of Basic Medical Science, China Three Gorges University, Yichang 443002, China
- Third-grade Pharmacological Laboratory on Traditional Chinese Medicine, State Administration of Traditional Chinese Medicine, China Three Gorges University, China
| | - Xi Cheng
- Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University
- College of Basic Medical Science, China Three Gorges University, Yichang 443002, China
- Third-grade Pharmacological Laboratory on Traditional Chinese Medicine, State Administration of Traditional Chinese Medicine, China Three Gorges University, China
| | - Lihan Chen
- Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University
- College of Basic Medical Science, China Three Gorges University, Yichang 443002, China
- Third-grade Pharmacological Laboratory on Traditional Chinese Medicine, State Administration of Traditional Chinese Medicine, China Three Gorges University, China
| | - Gang Zhou
- College of Traditional Chinese Medicine, China Three Gorges University, Yichang, 443002, China
- Yichang Hospital of Traditional Chinese Medicine, Yichang, 443002, China
| | - Chengfu Yuan
- Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, China Three Gorges University
- College of Basic Medical Science, China Three Gorges University, Yichang 443002, China
- Third-grade Pharmacological Laboratory on Traditional Chinese Medicine, State Administration of Traditional Chinese Medicine, China Three Gorges University, China
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Zhou J, Tang CK. Cytoplasmic Polyadenylation Element Binding Protein 1 and Atherosclerosis: Prospective Target and New Insights. Curr Vasc Pharmacol 2024; 22:95-105. [PMID: 38284693 DOI: 10.2174/0115701611258090231221082502] [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: 05/12/2023] [Revised: 12/11/2023] [Accepted: 12/12/2023] [Indexed: 01/30/2024]
Abstract
The ribonucleic acid (RNA)-binding protein Cytoplasmic Polyadenylation Element Binding Protein 1 (CPEB1), a key member of the CPEB family, is essential in controlling gene expression involved in both healthy physiological and pathological processes. CPEB1 can bind to the 3'- untranslated regions (UTR) of substrate messenger ribonucleic acid (mRNA) and regulate its translation. There is increasing evidence that CPEB1 is closely related to the pathological basis of atherosclerosis. According to recent investigations, many pathological processes, including inflammation, lipid metabolism, endothelial dysfunction, angiogenesis, oxidative stress, cellular senescence, apoptosis, and insulin resistance, are regulated by CPEB1. This review considers the prevention and treatment of atherosclerotic heart disease in relation to the evolution of the physiological function of CPEB1, recent research breakthroughs, and the potential participation of CPEB1 in atherosclerosis.
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Affiliation(s)
- Jing Zhou
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, School of Pharmacology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Chao-Ke Tang
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, School of Pharmacology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
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4
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Camargo Ortega G, Götz M. Centrosome heterogeneity in stem cells regulates cell diversity. Trends Cell Biol 2022; 32:707-719. [PMID: 35750615 DOI: 10.1016/j.tcb.2022.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/14/2022] [Accepted: 03/21/2022] [Indexed: 11/27/2022]
Abstract
Stem cells are at the source of creating cellular diversity. Multiple mechanisms, including basic cell biological processes, regulate their fate. The centrosome is at the core of many stem cell functions and recent work highlights the association of distinct proteins at the centrosome in stem cell differentiation. As showcased by a novel centrosome protein regulating neural stem cell differentiation, it is timely to review the heterogeneity of the centrosome at protein and RNA levels and how this impacts their function in stem and progenitor cells. Together with evidence for heterogeneity of other organelles so far considered as similar between cells, we call for exploring the cell type-specific composition of organelles as a way to expand protein function in development with relevance to regenerative medicine.
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Affiliation(s)
- Germán Camargo Ortega
- Department of Biosystems Science and Engineering, ETH, Zurich, 4058 Basel, Switzerland.
| | - Magdalena Götz
- Institute of Stem Cell Research, Helmholtz Center Munich, 82152 Planegg-Martinsried, Germany; Physiological Genomics, Biomedical Center, Ludwig-Maximilians University, 82152 Planegg-Martinsried, Germany; 4 SYNERGY, Excellence Cluster of Systems Neurology, Biomedical Center, Ludwig-Maximilians-University, 82152 Planegg-Martinsried, Germany.
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Mazaré N, Oudart M, Cohen-Salmon M. Local translation in perisynaptic and perivascular astrocytic processes - a means to ensure astrocyte molecular and functional polarity? J Cell Sci 2021; 134:237323. [PMID: 33483366 DOI: 10.1242/jcs.251629] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Together with the compartmentalization of mRNAs in distal regions of the cytoplasm, local translation constitutes a prominent and evolutionarily conserved mechanism mediating cellular polarization and the regulation of protein delivery in space and time. The translational regulation of gene expression enables a rapid response to stimuli or to a change in the environment, since the use of pre-existing mRNAs can bypass time-consuming nuclear control mechanisms. In the brain, the translation of distally localized mRNAs has been mainly studied in neurons, whose cytoplasmic protrusions may be more than 1000 times longer than the diameter of the cell body. Importantly, alterations in local translation in neurons have been implicated in several neurological diseases. Astrocytes, the most abundant glial cells in the brain, are voluminous, highly ramified cells that project long processes to neurons and brain vessels, and dynamically regulate distal synaptic and vascular functions. Recent research has demonstrated the presence of local translation at these astrocytic interfaces that might regulate the functional compartmentalization of astrocytes. In this Review, we summarize our current knowledge about the localization and local translation of mRNAs in the distal perisynaptic and perivascular processes of astrocytes, and discuss their possible contribution to the molecular and functional polarity of astrocytes.
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Affiliation(s)
- Noémie Mazaré
- Physiology and Physiopathology of the Gliovascular Unit Research Group, Center for Interdisciplinary Research in Biology (CIRB), College de France, CNRS Unité Mixte de Recherche 724, INSERM Unité 1050, Labex Memolife, PSL Research University, F-75005 Paris, France.,École doctorale Cerveau Cognition Comportement 'ED3C' No. 158, Pierre and Marie Curie University, F-75005 Paris, France
| | - Marc Oudart
- Physiology and Physiopathology of the Gliovascular Unit Research Group, Center for Interdisciplinary Research in Biology (CIRB), College de France, CNRS Unité Mixte de Recherche 724, INSERM Unité 1050, Labex Memolife, PSL Research University, F-75005 Paris, France.,École doctorale Cerveau Cognition Comportement 'ED3C' No. 158, Pierre and Marie Curie University, F-75005 Paris, France
| | - Martine Cohen-Salmon
- Physiology and Physiopathology of the Gliovascular Unit Research Group, Center for Interdisciplinary Research in Biology (CIRB), College de France, CNRS Unité Mixte de Recherche 724, INSERM Unité 1050, Labex Memolife, PSL Research University, F-75005 Paris, France .,École doctorale Cerveau Cognition Comportement 'ED3C' No. 158, Pierre and Marie Curie University, F-75005 Paris, France
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Wang Y, Yang J, Chen P, Song Y, An W, Zhang H, Butegeleqi B, Yan J. MicroRNA-320a inhibits invasion and metastasis in osteosarcoma by targeting cytoplasmic polyadenylation element-binding protein 1. Cancer Med 2020; 9:2833-2845. [PMID: 32064777 PMCID: PMC7163091 DOI: 10.1002/cam4.2919] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 01/07/2020] [Accepted: 01/26/2020] [Indexed: 02/06/2023] Open
Abstract
Osteosarcoma is a primary malignant bone tumor, which affects children, adolescents, and young adults commonly. MicroRNAs (miRNAs) have been proved to be dysregulated in different cancers, including osteosarcoma. Although miR‐320a has been implicated in many types of malignancies, little is known about the role of miR‐320a in osteosarcoma. In this study, we show that the overexpression of miR‐320a or knockdown of cytoplasmic polyadenylation element‐binding protein 1 (CPEB1) inhibited osteosarcoma cell migration and invasion. miR‐320a downregulates CPEB1 expression by directly targeting the CPEB1 3′‐UTR. Furthermore, CPEB1 reintroduction reversed the antiproliferation, antimigration, and antiinvasion roles of miR‐320a, indicating that miR‐320a might function as a tumor suppressor in osteosarcoma through CPEB1. In conclusion, our study demonstrates that miR‐320a plays a critical role in osteosarcoma progression and may provide a potential therapeutic target for osteosarcoma.
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Affiliation(s)
- Yanlong Wang
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Jiyu Yang
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Pangtao Chen
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Yu Song
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Weizheng An
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Haoran Zhang
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Butegeleqi Butegeleqi
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
| | - Jinglong Yan
- Departments of Orthopedic Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P.R. China
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Cataloguing and Selection of mRNAs Localized to Dendrites in Neurons and Regulated by RNA-Binding Proteins in RNA Granules. Biomolecules 2020; 10:biom10020167. [PMID: 31978946 PMCID: PMC7072219 DOI: 10.3390/biom10020167] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/18/2020] [Accepted: 01/20/2020] [Indexed: 12/15/2022] Open
Abstract
Spatiotemporal translational regulation plays a key role in determining cell fate and function. Specifically, in neurons, local translation in dendrites is essential for synaptic plasticity and long-term memory formation. To achieve local translation, RNA-binding proteins in RNA granules regulate target mRNA stability, localization, and translation. To date, mRNAs localized to dendrites have been identified by comprehensive analyses. In addition, mRNAs associated with and regulated by RNA-binding proteins have been identified using various methods in many studies. However, the results obtained from these numerous studies have not been compiled together. In this review, we have catalogued mRNAs that are localized to dendrites and are associated with and regulated by the RNA-binding proteins fragile X mental retardation protein (FMRP), RNA granule protein 105 (RNG105, also known as Caprin1), Ras-GAP SH3 domain binding protein (G3BP), cytoplasmic polyadenylation element binding protein 1 (CPEB1), and staufen double-stranded RNA binding proteins 1 and 2 (Stau1 and Stau2) in RNA granules. This review provides comprehensive information on dendritic mRNAs, the neuronal functions of mRNA-encoded proteins, the association of dendritic mRNAs with RNA-binding proteins in RNA granules, and the effects of RNA-binding proteins on mRNA regulation. These findings provide insights into the mechanistic basis of protein-synthesis-dependent synaptic plasticity and memory formation and contribute to future efforts to understand the physiological implications of local regulation of dendritic mRNAs in neurons.
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Yu CG, Bondada V, Ghoshal S, Singh R, Pistilli CK, Dayaram K, Iqbal H, Sands M, Davis KL, Bondada S, Geddes JW. Repositioning Flubendazole for Spinal Cord Injury. J Neurotrauma 2019; 36:2618-2630. [PMID: 30747048 DOI: 10.1089/neu.2018.6160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
We previously reported the serendipitous observation that fenbendazole, a benzimidazole anthelmintic, improved functional and pathological outcomes following thoracic spinal cord contusion injury in mice when administered pre-injury. Fenbendazole is widely used in veterinary medicine. However, it is not approved for human use and it was uncertain if only post-injury administration would offer similar benefits. In the present study we evaluated post-injury administration of a closely related, human anthelmintic drug, flubendazole, using a rat spinal cord contusion injury model. Flubendazole, administered i.p. 5 or 10 mg/kg day, beginning 3 h post-injury and daily thereafter for 2 or 4 weeks, resulted in improved locomotor function after contusion spinal cord injury (SCI) compared with vehicle-treated controls. Histological analysis of spinal cord sections showed that such treatment with flubendazole also reduced lesion volume and improved total tissue sparing, white matter sparing, and gray matter sparing. Flubendazole inhibited the activation of glial fibrillary acidic protein (GFAP); suppressed cyclin B1 expression and Bruton tyrosine kinase activation, markers of B cell activation/proliferation and inflammation; and reduced B cell autoimmune response. Together, these results suggest the use of the benzimidazole anthelmintic flubendazole as a potential therapeutic for SCI.
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Affiliation(s)
- Chen Guang Yu
- Spinal Cord and Brain Injury Research Center, Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Vimala Bondada
- Spinal Cord and Brain Injury Research Center, Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Sarbani Ghoshal
- Spinal Cord and Brain Injury Research Center, Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Ranjana Singh
- Spinal Cord and Brain Injury Research Center, Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Christina K Pistilli
- Spinal Cord and Brain Injury Research Center, Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Kavi Dayaram
- Spinal Cord and Brain Injury Research Center, Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Hina Iqbal
- Spinal Cord and Brain Injury Research Center, Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Madison Sands
- Spinal Cord and Brain Injury Research Center, Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Kate L Davis
- Spinal Cord and Brain Injury Research Center, Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
| | - Subarrao Bondada
- Department of Microbiology, Immunology, and Molecular Genetics, University of Kentucky College of Medicine, Lexington, Kentucky
| | - James W Geddes
- Spinal Cord and Brain Injury Research Center, Department of Neuroscience, University of Kentucky College of Medicine, Lexington, Kentucky
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Prochazkova B, Komrskova P, Kubelka M. CPEB2 Is Necessary for Proper Porcine Meiotic Maturation and Embryonic Development. Int J Mol Sci 2018; 19:ijms19103138. [PMID: 30322039 PMCID: PMC6214008 DOI: 10.3390/ijms19103138] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 10/02/2018] [Accepted: 10/09/2018] [Indexed: 02/07/2023] Open
Abstract
Oocyte meiotic maturation and embryogenesis are some of the most important physiological processes that occur in organisms, playing crucial roles in the preservation of life in all species. The post-transcriptional regulation of maternal messenger ribonucleic acids (mRNAs) and the post-translational regulation of proteins are critical in the control of oocyte maturation and early embryogenesis. Translational control affects the basic mechanism of protein synthesis, thus, knowledge of the key components included in this machinery is required in order to understand its regulation. Cytoplasmic polyadenylation element binding proteins (CPEBs) bind to the 3′-end of mRNAs to regulate their localization and translation and are necessary for proper development. In this study we examined the expression pattern of cytoplasmic polyadenylation element binding protein 2 (CPEB2) both on the mRNA (by real-time quantitative reverse transcription polymerase chain reaction, qRT-PCR) and protein (by Western blotting, WB) level, as well as its localization during the meiotic maturation of porcine oocytes and early embryonic development by immunocytochemistry (ICC). For the elucidation of its functions, CPEB2 knockdown by double-strand RNA (dsRNA) was used. We discovered that CPEB2 is expressed during all stages of porcine meiotic maturation and embryonic development. Moreover, we found that it is necessary to enable a high percentage of oocytes to reach the metaphase II (MII) stage, as well as for the production of good-quality parthenogenetic blastocysts.
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Affiliation(s)
- Barbora Prochazkova
- Department of Veterinary Sciences, Czech University of Life Sciences, Kamycka 129, 165 00 Prague, Czech Republic.
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Rumburska 89, 277 21 Libechov, Czech Republic.
| | - Pavla Komrskova
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Rumburska 89, 277 21 Libechov, Czech Republic.
| | - Michal Kubelka
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Rumburska 89, 277 21 Libechov, Czech Republic.
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Cooperativity in RNA–protein interactions: the complex is more than the sum of its partners. Curr Opin Neurobiol 2016; 39:146-51. [DOI: 10.1016/j.conb.2016.06.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/07/2016] [Accepted: 06/08/2016] [Indexed: 12/13/2022]
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11
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Turimella SL, Bedner P, Skubal M, Vangoor VR, Kaczmarczyk L, Karl K, Zoidl G, Gieselmann V, Seifert G, Steinhäuser C, Kandel E, Theis M. Characterization of cytoplasmic polyadenylation element binding 2 protein expression and its RNA binding activity. Hippocampus 2014; 25:630-42. [DOI: 10.1002/hipo.22399] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 12/02/2014] [Accepted: 12/03/2014] [Indexed: 12/30/2022]
Affiliation(s)
| | - Peter Bedner
- Institute of Cellular Neurosciences, University of Bonn; Bonn Germany
| | - Magdalena Skubal
- Institute of Cellular Neurosciences, University of Bonn; Bonn Germany
| | | | - Lech Kaczmarczyk
- Institute of Cellular Neurosciences, University of Bonn; Bonn Germany
| | - Kevin Karl
- HHMI; Center for Neurobiology and Behavior; Columbia University; New York New York
| | - Georg Zoidl
- Department of Psychology; Faculty of Health; York University; Toronto Canada
| | - Volkmar Gieselmann
- Institute of Biochemistry and Molecular Biology, University of Bonn; Bonn Germany
| | - Gerald Seifert
- Institute of Cellular Neurosciences, University of Bonn; Bonn Germany
| | | | - Eric Kandel
- HHMI; Center for Neurobiology and Behavior; Columbia University; New York New York
| | - Martin Theis
- Institute of Cellular Neurosciences, University of Bonn; Bonn Germany
- HHMI; Center for Neurobiology and Behavior; Columbia University; New York New York
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12
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Rutledge CE, Lau HT, Mangan H, Hardy LL, Sunnotel O, Guo F, MacNicol AM, Walsh CP, Lees-Murdock DJ. Efficient translation of Dnmt1 requires cytoplasmic polyadenylation and Musashi binding elements. PLoS One 2014; 9:e88385. [PMID: 24586322 PMCID: PMC3930535 DOI: 10.1371/journal.pone.0088385] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 01/06/2014] [Indexed: 12/14/2022] Open
Abstract
Regulation of DNMT1 is critical for epigenetic control of many genes and for genome stability. Using phylogenetic analysis we characterized a block of 27 nucleotides in the 3′UTR of Dnmt1 mRNA identical between humans and Xenopus and investigated the role of the individual elements contained within it. This region contains a cytoplasmic polyadenylation element (CPE) and a Musashi binding element (MBE), with CPE binding protein 1 (CPEB1) known to bind to the former in mouse oocytes. The presence of these elements usually indicates translational control by elongation and shortening of the poly(A) tail in the cytoplasm of the oocyte and in some somatic cell types. We demonstrate for the first time cytoplasmic polyadenylation of Dnmt1 during periods of oocyte growth in mouse and during oocyte activation in Xenopus. Furthermore we show by RNA immunoprecipitation that Musashi1 (MSI1) binds to the MBE and that this element is required for polyadenylation in oocytes. As well as a role in oocytes, site-directed mutagenesis and reporter assays confirm that mutation of either the MBE or CPE reduce DNMT1 translation in somatic cells, but likely act in the same pathway: deletion of the whole conserved region has more severe effects on translation in both ES and differentiated cells. In adult cells lacking MSI1 there is a greater dependency on the CPE, with depletion of CPEB1 or CPEB4 by RNAi resulting in substantially reduced levels of endogenous DNMT1 protein and concurrent upregulation of the well characterised CPEB target mRNA cyclin B1. Our findings demonstrate that CPE- and MBE-mediated translation regulate DNMT1 expression, representing a novel mechanism of post-transcriptional control for this gene.
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Affiliation(s)
- Charlotte E. Rutledge
- Transcriptional Regulation and Epigenetics Research Group, School of Biomedical Sciences, University of Ulster, Coleraine, North Ireland, United Kingdom
| | - Ho-Tak Lau
- Transcriptional Regulation and Epigenetics Research Group, School of Biomedical Sciences, University of Ulster, Coleraine, North Ireland, United Kingdom
| | - Hazel Mangan
- Transcriptional Regulation and Epigenetics Research Group, School of Biomedical Sciences, University of Ulster, Coleraine, North Ireland, United Kingdom
| | - Linda L. Hardy
- Department of Neurobiology and Developmental Sciences, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Olaf Sunnotel
- Transcriptional Regulation and Epigenetics Research Group, School of Biomedical Sciences, University of Ulster, Coleraine, North Ireland, United Kingdom
| | - Fan Guo
- The State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Angus M. MacNicol
- Department of Neurobiology and Developmental Sciences, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Colum P. Walsh
- Transcriptional Regulation and Epigenetics Research Group, School of Biomedical Sciences, University of Ulster, Coleraine, North Ireland, United Kingdom
| | - Diane J. Lees-Murdock
- Transcriptional Regulation and Epigenetics Research Group, School of Biomedical Sciences, University of Ulster, Coleraine, North Ireland, United Kingdom
- * E-mail:
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A role of CPEB1 in the modulation of proliferation and neuronal maturation of rat primary neural progenitor cells. Neurochem Res 2013; 38:1960-72. [PMID: 23824559 DOI: 10.1007/s11064-013-1102-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 06/23/2013] [Accepted: 06/26/2013] [Indexed: 12/17/2022]
Abstract
Cytoplasmic polyadenylation binding protein 1 (CPEB1) is a RNA binding protein, which regulates translation of target mRNAs by regulating polyadenylation status. CPEB1 plays important roles in the regulation of germline cell development by modulating cell cycle progression through the polyadenylation of target mRNAs such as cyclin B1. Similar mechanism is reported in proliferating astrocytes by us, although CPEB1 is involved in the transport of target mRNAs as well as local translation at dendritic spines. In this study, we found the expression of CPEB1 in cultured rat primary neural progenitor cells (NPCs). EGF stimulation of cultured NPCs induced rapid phosphorylation of CPEB1, a hallmark of CPEB1-dependent translational control along with cyclin B1 polyadenylation and translation. EGF-induced activation of ERK1/2 and Aurora A kinase was responsible for CPEB1 phosphorylation. Pharmacological inhibition studies suggested that ERK1/2 is involved in the activation of Aurora A kinase and regulation of CPEB1 phosphorylation in cultured NPCs. Long-term incubation in EGF resulted in the down-regulation of CPEB1 expression, which further increased expression of cyclin B1 and cell cycle progression. When we down-regulated the expression of CPEB1 in NPCs by siRNA transfection, the proliferation of NPCs was increased. Increased NPCs proliferation by down-regulation of CPEB1 resulted in eventual up-regulation of neuronal differentiation with increase in both pre- and post-synaptic proteins. The results from the present study may suggest the importance of translational control in the regulation of neuronal development, an emerging concept in many neurodevelopmental and psychiatric disorders such as autism spectrum disorder.
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Cho KS, Joo SH, Choi CS, Kim KC, Ko HM, Park JH, Kim P, Hur J, Lee SH, Bahn GH, Ryu JH, Lee J, Han SH, Kwon KJ, Shin CY. Glucose deprivation reversibly down-regulates tissue plasminogen activator via proteasomal degradation in rat primary astrocytes. Life Sci 2013; 92:929-37. [DOI: 10.1016/j.lfs.2013.03.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 03/12/2013] [Accepted: 03/20/2013] [Indexed: 11/30/2022]
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15
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Mishra R. Cell cycle-regulatory cyclins and their deregulation in oral cancer. Oral Oncol 2013; 49:475-81. [PMID: 23434055 DOI: 10.1016/j.oraloncology.2013.01.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 01/24/2013] [Accepted: 01/25/2013] [Indexed: 11/26/2022]
Abstract
Oral cancer is a growth-related disorder, and cyclins are the prime regulators of cell division. Cyclins are associated with the pathogenesis of oral cancer and are considered valuable biomarkers for diagnosis and prognosis. These important molecules are regulated in many ways to achieve a gain in function and are involved in promoting neoplastic growth. While the causes of most cyclin overexpression are varied, these cyclins may be induced by buccal mucosal insult mainly with carcinogens that alter various pathways propelling oral cancer. Substantial experimental evidences support a link between oncogenic signaling pathways and the deregulation of cyclins in oral cancer. This review focuses on the mechanisms by which cyclins are regulated and promote oral oncogenesis.
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Affiliation(s)
- Rajakishore Mishra
- Centre for Life Sciences, School of Natural Sciences, Central University of Jharkhand, Ratu-Lohardaga Road, Brambe, Ranchi 835 205, Jharkhand, India.
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16
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Abstract
Cytoplasmic polyadenylation element-binding protein 1 (CPEB1) is an mRNA-binding protein present in both neurons and glia. CPEB1 is capable of both repressing mRNA translation and activating it depending upon its phosphorylation state. CPEB1-bound mRNAs are held in translational dormancy until CPEB1 is phosphorylated, leading to the cytoplasmic polyadenylation of the bound mRNA that triggers translation. Here, we show that CPEB1 can bind to and regulate translation of the mRNA-encoding metadherin (MTDH, also known as AEG-1 and Lyric) in the rat glioblastoma cell line CNS1. MTDH/AEG-1 is being revealed as a critical signaling molecule in tumor progression, playing roles in invasion, metastasis, and chemoresistance. By using a mutant of CPEB1 that cannot be phosphorylated (thereby holding target mRNAs in translational arrest), we show that inhibiting CPEB1-mediated translation blocks MTDH/AEG-1 expression in vitro and inhibits glioblastomas tumor growth in vivo. CPEB1-mediated translation is likely to impact several signaling pathways that may promote tumor progression, but we present evidence suggesting a role in directed cell migration in glioblastoma cells. In addition, reporter mRNA containing CPEB1-binding sites is transported to the leading edge of migrating cells and translated, whereas the same mRNA with point mutations in the binding sites is synthesized perinuclearly. Our findings show that CPEB1 is hyperactive in rat glioblastoma cells and is regulating an important cohort of mRNAs whose increased translation is fueling the progression of tumor proliferation and dispersal in the brain. Thus, targeting CPEB1-mediated mRNA translation might be a sound therapeutic approach.
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Affiliation(s)
- Dawn M Kochanek
- Department of Molecular, Cellular & Developmental Biology, 260 Whitney Ave, KBT 338, Box 208103, New Haven, CT 06520, USA
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17
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Ogami K, Hosoda N, Funakoshi Y, Hoshino S. Antiproliferative protein Tob directly regulates c-myc proto-oncogene expression through cytoplasmic polyadenylation element-binding protein CPEB. Oncogene 2012. [PMID: 23178487 DOI: 10.1038/onc.2012.548] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The regulation of mRNA deadenylation constitutes a pivotal mechanism of the post-transcriptional control of gene expression. Here we show that the antiproliferative protein Tob, a component of the Caf1-Ccr4 deadenylase complex, is involved in regulating the expression of the proto-oncogene c-myc. The c-myc mRNA contains cis elements (CPEs) in its 3'-untranslated region (3'-UTR), which are recognized by the cytoplasmic polyadenylation element-binding protein (CPEB). CPEB recruits Caf1 deadenylase through interaction with Tob to form a ternary complex, CPEB-Tob-Caf1, and negatively regulates the expression of c-myc by accelerating the deadenylation and decay of its mRNA. In quiescent cells, c-myc mRNA is destabilized by the trans-acting complex (CPEB-Tob-Caf1), while in cells stimulated by the serum, both Tob and Caf1 are released from CPEB, and c-Myc expression is induced early after stimulation by the stabilization of its mRNA as an 'immediate-early gene'. Collectively, these results indicate that Tob is a key factor in the regulation of c-myc gene expression, which is essential for cell growth. Thus, Tob appears to function in the control of cell growth at least, in part, by regulating the expression of c-myc.
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Affiliation(s)
- K Ogami
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - N Hosoda
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - Y Funakoshi
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
| | - S Hoshino
- Department of Biological Chemistry, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan
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Fernández-Miranda G, Méndez R. The CPEB-family of proteins, translational control in senescence and cancer. Ageing Res Rev 2012; 11:460-72. [PMID: 22542725 DOI: 10.1016/j.arr.2012.03.004] [Citation(s) in RCA: 120] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 03/14/2012] [Accepted: 03/27/2012] [Indexed: 12/31/2022]
Abstract
Cytoplasmic elongation of the poly(A) tail was originally identified as a mechanism to activate maternal mRNAs, stored as silent transcripts with short poly(A) tails, during meiotic progression. A family of RNA-binding proteins named CPEBs, which recruit the translational repression or cytoplasmic polyadenylation machineries to their target mRNAs, directly mediates cytoplasmic polyadenylation. Recent years have witnessed an explosion of studies showing that CPEBs are not only expressed in a variety of somatic tissues, but have essential functions controlling gene expression in time and space in the adult organism. These "new" functions of the CPEBs include regulating the balance between senescence and proliferation and its pathological manifestation, tumor development. In this review, we summarize current knowledge on the functions of the CPEB-family of proteins in the regulation of cell proliferation, their target mRNAs and the mechanism controlling their activities.
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