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Arasaki Y, Hayata T. The RNA-binding protein Cpeb4 regulates splicing of the Id2 gene in osteoclast differentiation. J Cell Physiol 2024; 239:e31197. [PMID: 38284484 DOI: 10.1002/jcp.31197] [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: 08/30/2023] [Revised: 01/04/2024] [Accepted: 01/09/2024] [Indexed: 01/30/2024]
Abstract
Cytoplasmic polyadenylation element-binding protein 4 (Cpeb4) is an RNA-binding protein that regulates posttranscriptional regulation, such as regulation of messenger RNA stability and translation. In the previous study, we reported that Cpeb4 localizes to nuclear bodies upon induction of osteoclast differentiation by RANKL. However, the mechanisms of the localization of Cpeb4 and osteoclastogenesis by Cpeb4 remain unknown. Here, we show that Cpeb4 localizes to the nuclear bodies by its RNA-binding ability and partially regulates normal splicing during osteoclast differentiation. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis with Phos-tag® revealed that the phosphorylation levels of Cpeb4 were already high in the RAW264.7 cells and were not altered by RANKL treatment. Immunofluorescence showed that exogenous Cpeb4 in HEK293T cells without RANKL stimulation localized to the same foci as shown in RANKL-stimulated RAW264.7 cells. Furthermore, when nuclear export was inhibited by leptomycin B treatment, Cpeb4 accumulated throughout the nucleus. Importantly, RNA recognition motif (RRM) 7 of Cpeb4 was essential for the localization. In contrast, the intrinsically disordered region, RRM1, and zinc finger domain CEBP_ZZ were not necessary for the localization. The mechanistic study showed that Cpeb4 co-localized and interacted with the splicing factors serine/arginine-rich splicing factor 5 (SRSF5) and SRSF6, suggesting that Cpeb4 may be involved in the splicing reaction. RNA-sequencing analysis revealed that the expression of genes related to cell proliferation processes, such as mitotic cell cycle and regulation of cell cycle processes, was elevated in osteoclasts depleted of Cpeb4. Interestingly, the splicing pattern of the inhibitor of DNA binding 2 (Id2) gene, which suppresses osteoclast differentiation, was altered by the depletion of Cpeb4. These results provide new insight into the role of Cpeb4 as a player of normal splicing of Id2 in osteoclast differentiation.
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Affiliation(s)
- Yasuhiro Arasaki
- Department of Molecular Pharmacology, Faculty of Pharmaceutical Science, Graduate School of Pharmaceutical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - Tadayoshi Hayata
- Department of Molecular Pharmacology, Faculty of Pharmaceutical Science, Graduate School of Pharmaceutical Sciences, Tokyo University of Science, Noda, Chiba, Japan
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2
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Sun M, Huang X, Ruan X, Shang X, Zhang M, Liu L, Wang P, An P, Lin Y, Yang J, Xue Y. Cpeb4-mediated Dclk2 promotes neuronal pyroptosis induced by chronic cerebral ischemia through phosphorylation of Ehf. J Cereb Blood Flow Metab 2024:271678X241240590. [PMID: 38513137 DOI: 10.1177/0271678x241240590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Chronic cerebral ischemia (CCI) is a clinical syndrome characterised by brain dysfunction due to decreased chronic cerebral perfusion. CCI initiates several inflammatory pathways, including pyroptosis. RNA-binding proteins (RBPs) play important roles in CCI. This study aimed to explore whether the interaction between RBP-Cpeb4 and Dclk2 affected Ehf phosphorylation to regulate neuronal pyroptosis. HT22 cells and mice were used to construct oxygen glucose deprivation (OGD)/CCI models. We found that Cpeb4 and Dclk2 were upregulated in OGD-treated HT22 cells and CCI-induced hippocampal CA1 tissues. Cpeb4 upregulated Dclk2 expression by increasing Dclk2 mRNA stability. Knockdown of Cpeb4 or Dclk2 inhibited neuronal pyroptosis in OGD-treated HT22 cells and CCI-induced hippocampal CA1 tissues. By binding to the promoter regions of Caspase1 and Caspase3, the transcription factor Ehf reduced their promoter activities and inhibited the transcription. Dclk2 phosphorylated Ehf and changed its nucleoplasmic distribution, resulting in the exit of p-Ehf from the nucleus and decreased Ehf levels. It promoted the expression of Caspase1 and Caspase3 and stimulated neuronal pyroptosis of HT22 cells induced by OGD. Cpeb4/Dclk2/Ehf pathway plays an important role in the regulation of cerebral ischemia-induced neuronal pyroptosis.
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Affiliation(s)
- Miao Sun
- Department of Neurobiology, School of life Sciences, China Medical University, Shenyang, China
- Key Laboratory of Neuro-Oncology in Liaoning Province, Shenyang, China
| | - Xin Huang
- Department of Radiology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Xuelei Ruan
- Department of Neurobiology, School of life Sciences, China Medical University, Shenyang, China
- Key Laboratory of Neuro-Oncology in Liaoning Province, Shenyang, China
| | - Xiuli Shang
- Department of Neurology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Mengyang Zhang
- Department of Neurobiology, School of life Sciences, China Medical University, Shenyang, China
- Key Laboratory of Neuro-Oncology in Liaoning Province, Shenyang, China
| | - Libo Liu
- Department of Neurobiology, School of life Sciences, China Medical University, Shenyang, China
- Key Laboratory of Neuro-Oncology in Liaoning Province, Shenyang, China
| | - Ping Wang
- Department of Neurobiology, School of life Sciences, China Medical University, Shenyang, China
- Key Laboratory of Neuro-Oncology in Liaoning Province, Shenyang, China
| | - Ping An
- Department of Neurobiology, School of life Sciences, China Medical University, Shenyang, China
- Key Laboratory of Neuro-Oncology in Liaoning Province, Shenyang, China
| | - Yang Lin
- Department of Neurobiology, School of life Sciences, China Medical University, Shenyang, China
- Key Laboratory of Neuro-Oncology in Liaoning Province, Shenyang, China
| | - Jin Yang
- Key Laboratory of Neuro-Oncology in Liaoning Province, Shenyang, China
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yixue Xue
- Department of Neurobiology, School of life Sciences, China Medical University, Shenyang, China
- Key Laboratory of Neuro-Oncology in Liaoning Province, Shenyang, China
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Bhardwaj A, Antonelli M, Ueberheide B, Neel BG. Identification of a Novel Hypoxia-induced Inflammatory Cell Death Pathway. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.05.552118. [PMID: 37808759 PMCID: PMC10557583 DOI: 10.1101/2023.08.05.552118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Hypoxic cancer cells resist many anti-neoplastic therapies and can seed recurrence. We found previously that PTP1B deficiency promotes HER2+ breast cancer cell death in hypoxia by activating RNF213, an ∼600kDa protein containing AAA-ATPase domains and two ubiquitin ligase domains (RING and RZ) that also is implicated in Moyamoya disease (MMD), lipotoxicity, and innate immunity. Here we report that PTP1B and ABL1/2 reciprocally control RNF213 phosphorylation on tyrosine-1275. This phosphorylation promotes RNF213 oligomerization and RZ domain activation. The RZ domain ubiquitylates CYLD/SPATA2, and together with the LUBAC complex, induces their degradation. Decreased CYLD/SPATA2 causes NF-κB activation, which together with hypoxia-induced ER-stress triggers GDSMD-dependent pyroptosis. Mutagenesis experiments show that the RING domain negatively regulates the RZ domain. CYLD -deleted HER2+ cell-derived xenografts phenocopy the effects of PTP1B deficiency, and reconstituting RNF213 knockout lines with RNF213 mutants shows that the RZ domain mediates PTP1B-dependent tumor cell death. Our results identify a novel, potentially targetable PTP1B/RNF213/CYCLD/SPATA pathway critical for controlling inflammatory cell death in hypoxic tumors that could be exploited to target hypoxic tumor cells, potentially turning "cold" tumors "hot". Our findings also reveal new insights into RNF213 regulation, and have potentially important implications for the pathogenesis of MMD, atherosclerosis, and inflammatory and auto-immune disorders.
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Huang YS, Mendez R, Fernandez M, Richter JD. CPEB and translational control by cytoplasmic polyadenylation: impact on synaptic plasticity, learning, and memory. Mol Psychiatry 2023; 28:2728-2736. [PMID: 37131078 PMCID: PMC10620108 DOI: 10.1038/s41380-023-02088-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 05/04/2023]
Abstract
The late 1990s were banner years in molecular neuroscience; seminal studies demonstrated that local protein synthesis, at or near synapses, was necessary for synaptic plasticity, the underlying cellular basis of learning and memory [1, 2]. The newly made proteins were proposed to "tag" the stimulated synapse, distinguishing it from naive synapses, thereby forming a cellular memory [3]. Subsequent studies demonstrated that the transport of mRNAs from soma to dendrite was linked with translational unmasking at synapses upon synaptic stimulation. It soon became apparent that one prevalent mechanism governing these events is cytoplasmic polyadenylation, and that among the proteins that control this process, CPEB, plays a central role in synaptic plasticity, and learning and memory. In vertebrates, CPEB is a family of four proteins, all of which regulate translation in the brain, that have partially overlapping functions, but also have unique characteristics and RNA binding properties that make them control different aspects of higher cognitive function. Biochemical analysis of the vertebrate CPEBs demonstrate them to respond to different signaling pathways whose output leads to specific cellular responses. In addition, the different CPEBs, when their functions go awry, result in pathophysiological phenotypes resembling specific human neurological disorders. In this essay, we review key aspects of the vertebrate CPEB proteins and cytoplasmic polyadenylation within the context of brain function.
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Affiliation(s)
- Yi-Shuian Huang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
| | - Raul Mendez
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, 08028, Barcelona, Spain.
- Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010, Barcelona, Spain.
| | | | - Joel D Richter
- Program in Molecular Medicine, University of Massachusetts Chan Medical School, Worcester, MA, 01605, USA.
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Malik AM, Wu JJ, Gillies CA, Doctrove QA, Li X, Huang H, Tank EHM, Shakkottai VG, Barmada S. Neuronal activity regulates Matrin 3 abundance and function in a calcium-dependent manner through calpain-mediated cleavage and calmodulin binding. Proc Natl Acad Sci U S A 2023; 120:e2206217120. [PMID: 37011198 PMCID: PMC10104577 DOI: 10.1073/pnas.2206217120] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 02/14/2023] [Indexed: 04/05/2023] Open
Abstract
RNA-binding protein (RBP) dysfunction is a fundamental hallmark of amyotrophic lateral sclerosis (ALS) and related neuromuscular disorders. Abnormal neuronal excitability is also a conserved feature in ALS patients and disease models, yet little is known about how activity-dependent processes regulate RBP levels and functions. Mutations in the gene encoding the RBP Matrin 3 (MATR3) cause familial disease, and MATR3 pathology has also been observed in sporadic ALS, suggesting a key role for MATR3 in disease pathogenesis. Here, we show that glutamatergic activity drives MATR3 degradation through an NMDA receptor-, Ca2+-, and calpain-dependent mechanism. The most common pathogenic MATR3 mutation renders it resistant to calpain degradation, suggesting a link between activity-dependent MATR3 regulation and disease. We also demonstrate that Ca2+ regulates MATR3 through a nondegradative process involving the binding of Ca2+/calmodulin to MATR3 and inhibition of its RNA-binding ability. These findings indicate that neuronal activity impacts both the abundance and function of MATR3, underscoring the effect of activity on RBPs and providing a foundation for further study of Ca2+-coupled regulation of RBPs implicated in ALS and related neurological diseases.
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Affiliation(s)
- Ahmed M. Malik
- Medical Scientist Training Program, University of Michigan, Ann Arbor, MI48109
- Neuroscience Graduate Program, University of Michigan, Ann Arbor, MI48109
- Department of Neurology, University of Michigan, Ann Arbor, MI48109
| | - Josephine J. Wu
- Department of Neurology, University of Michigan, Ann Arbor, MI48109
- Cellular and Molecular Biology Graduate Program, University of Michigan, Ann Arbor, MI48109
| | - Christie A. Gillies
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, MI48109
| | - Quinlan A. Doctrove
- Neuroscience Graduate Program, University of Michigan, Ann Arbor, MI48109
- Postbac Research Education Program, University of Michigan, Ann Arbor, MI48109
| | - Xingli Li
- Department of Neurology, University of Michigan, Ann Arbor, MI48109
| | - Haoran Huang
- University of Texas Southwestern Medical Center, Dallas, TX 75390
| | | | | | - Sami Barmada
- Neuroscience Graduate Program, University of Michigan, Ann Arbor, MI48109
- Department of Neurology, University of Michigan, Ann Arbor, MI48109
- Cellular and Molecular Biology Graduate Program, University of Michigan, Ann Arbor, MI48109
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Hong N, Kim HJ, Kang K, Park JO, Mun S, Kim HG, Kang BH, Chung PS, Lee MY, Ahn JC. Photobiomodulation improves the synapses and cognitive function and ameliorates epileptic seizure by inhibiting downregulation of Nlgn3. Cell Biosci 2023; 13:8. [PMID: 36635704 PMCID: PMC9837965 DOI: 10.1186/s13578-022-00949-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 12/21/2022] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Temporal lobe epilepsy (TLE) remains one of the most drug-resistant focal epilepsies. Glutamate excitotoxicity and neuroinflammation which leads to loss of synaptic proteins and neuronal death appear to represent a pathogen that characterizes the neurobiology of TLE. Photobiomodulation (PBM) is a rapidly growing therapy for the attenuation of neuronal degeneration harboring non-invasiveness benefits. However, the detailed effects of PBM on excitotoxicity or neuroinflammation remain unclear. We investigated whether tPBM exerts neuroprotective effects on hippocampal neurons in epilepsy mouse model by regulating synapse and synapse-related genes. METHODS In an in vitro study, we performed imaging analysis and western blot in primary hippocampal neurons from embryonic (E17) rat pups. In an in vivo study, RNA sequencing was performed to identify the gene regulatory by PBM. Histological stain and immunohistochemistry analyses were used to assess synaptic connections, neuroinflammation and neuronal survival. Behavioral tests were used to evaluate the effects of PBM on cognitive functions. RESULTS PBM was upregulated synaptic connections in an in vitro. In addition, it was confirmed that transcranial PBM reduced synaptic degeneration, neuronal apoptosis, and neuroinflammation in an in vivo. These effects of PBM were supported by RNA sequencing results showing the relation of PBM with gene regulatory networks of neuronal functions. Specifically, Nlgn3 showed increase after PBM and silencing the Nlgn3 reversed the positive effect of PBM in in vitro. Lastly, behavioral alterations including hypoactivity, anxiety and impaired memory were recovered along with the reduction of seizure score in PBM-treated mice. CONCLUSIONS Our findings demonstrate that PBM attenuates epileptic excitotoxicity, neurodegeneration and cognitive decline induced by TLE through inhibition of the Nlgn3 gene decrease induced by excitotoxicity.
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Affiliation(s)
- Namgue Hong
- grid.411982.70000 0001 0705 4288Medical Laser Research Center, Dankook University, Cheonan, Republic of Korea ,grid.411982.70000 0001 0705 4288Department of Biomedical Science, College of Medicine, Dankook University, Cheonan, Republic of Korea
| | - Hee Jung Kim
- grid.411982.70000 0001 0705 4288Department of Physiology, College of Medicine, Dankook University, Cheonan, Republic of Korea
| | - Keunsoo Kang
- grid.411982.70000 0001 0705 4288Department of Microbiology, College of Science & Technology, Dankook University, Cheonan, Republic of Korea
| | - Ji On Park
- grid.411982.70000 0001 0705 4288Department of Medicine, Graduate School of Dankook University, Dankook University, Cheonan, Republic of Korea
| | - Seyoung Mun
- grid.411982.70000 0001 0705 4288Department of Microbiology, College of Science & Technology, Dankook University, Cheonan, Republic of Korea ,grid.411982.70000 0001 0705 4288Center for Bio-Medical Engineering Core Facility, Dankook University, Cheonan, Republic of Korea
| | - Hyung-Gun Kim
- grid.411982.70000 0001 0705 4288Department of Pharmacology, College of Medicine, Dankook University, Cheonan, Republic of Korea
| | - Bong Hui Kang
- grid.411982.70000 0001 0705 4288Department of Neurology, Dankook University Hospital, Dankook University, Cheonan, Republic of Korea
| | - Phil-Sang Chung
- grid.411982.70000 0001 0705 4288Beckman Laser Institute Korea, Dankook University Hospital, Dankook University, Cheonan, Republic of Korea ,grid.411982.70000 0001 0705 4288Department of Otolaryngology-Head & Neck Surgery, College of Medicine, Dankook University Hospital, Dankook University, Cheonan, Republic of Korea
| | - Min Young Lee
- grid.411982.70000 0001 0705 4288Medical Laser Research Center, Dankook University, Cheonan, Republic of Korea ,grid.411982.70000 0001 0705 4288Department of Biomedical Science, College of Medicine, Dankook University, Cheonan, Republic of Korea ,grid.411982.70000 0001 0705 4288Beckman Laser Institute Korea, Dankook University Hospital, Dankook University, Cheonan, Republic of Korea ,grid.411982.70000 0001 0705 4288Department of Otolaryngology-Head & Neck Surgery, College of Medicine, Dankook University Hospital, Dankook University, Cheonan, Republic of Korea
| | - Jin-Chul Ahn
- grid.411982.70000 0001 0705 4288Medical Laser Research Center, Dankook University, Cheonan, Republic of Korea ,grid.411982.70000 0001 0705 4288Department of Biomedical Science, College of Medicine, Dankook University, Cheonan, Republic of Korea ,grid.411982.70000 0001 0705 4288Beckman Laser Institute Korea, Dankook University Hospital, Dankook University, Cheonan, Republic of Korea
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Mafi A, Rahmati A, Babaei Aghdam Z, Salami R, Salami M, Vakili O, Aghadavod E. Recent insights into the microRNA-dependent modulation of gliomas from pathogenesis to diagnosis and treatment. Cell Mol Biol Lett 2022; 27:65. [PMID: 35922753 PMCID: PMC9347108 DOI: 10.1186/s11658-022-00354-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 06/22/2022] [Indexed: 11/11/2022] Open
Abstract
Gliomas are the most lethal primary brain tumors in adults. These highly invasive tumors have poor 5-year survival for patients. Gliomas are principally characterized by rapid diffusion as well as high levels of cellular heterogeneity. However, to date, the exact pathogenic mechanisms, contributing to gliomas remain ambiguous. MicroRNAs (miRNAs), as small noncoding RNAs of about 20 nucleotides in length, are known as chief modulators of different biological processes at both transcriptional and posttranscriptional levels. More recently, it has been revealed that these noncoding RNA molecules have essential roles in tumorigenesis and progression of multiple cancers, including gliomas. Interestingly, miRNAs are able to modulate diverse cancer-related processes such as cell proliferation and apoptosis, invasion and migration, differentiation and stemness, angiogenesis, and drug resistance; thus, impaired miRNAs may result in deterioration of gliomas. Additionally, miRNAs can be secreted into cerebrospinal fluid (CSF), as well as the bloodstream, and transported between normal and tumor cells freely or by exosomes, converting them into potential diagnostic and/or prognostic biomarkers for gliomas. They would also be great therapeutic agents, especially if they could cross the blood–brain barrier (BBB). Accordingly, in the current review, the contribution of miRNAs to glioma pathogenesis is first discussed, then their glioma-related diagnostic/prognostic and therapeutic potential is highlighted briefly.
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Affiliation(s)
- Alireza Mafi
- Department of Clinical Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Atefe Rahmati
- Department of Hematology and Blood Banking, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Basic Science, Neyshabur University of Medical Science, Neyshabur, Iran
| | - Zahra Babaei Aghdam
- Imaging Sciences Research Group, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Raziyeh Salami
- Department of Clinical Biochemistry, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Marziyeh Salami
- Department of Clinical Biochemistry, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Omid Vakili
- Department of Clinical Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Esmat Aghadavod
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran. .,Department of Clinical Biochemistry, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran.
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8
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Balvey A, Fernandez M. Translational Control in Liver Disease. Front Physiol 2021; 12:795298. [PMID: 34912244 PMCID: PMC8667601 DOI: 10.3389/fphys.2021.795298] [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] [Received: 10/14/2021] [Accepted: 11/08/2021] [Indexed: 12/12/2022] Open
Abstract
Chronic liver disease is one of the biggest threats to public health worldwide. Worryingly, the incidence of liver disease is dramatically rising due to the aging of the population and the global epidemics of obesity. Both are major risk factors for chronic liver disease and adverse prognostic factors, causing an increase in mortality rate. It is of great concern that 80–95% of obese people have non-alcoholic fatty liver disease, the major precursor for liver failure and a global health challenge. Currently, the only curative treatment for advanced chronic liver disease is liver transplantation, which is, however, hampered by high treatment costs and the scarcity of donor organs. New strategies are therefore urgently needed to prevent and reverse chronic liver disease. And for that it is essential to understand better the molecular mechanisms underlying human disease. This review focuses on the abnormalities in the regulation of translation by RNA-binding proteins during chronic liver disease and their pathological impact on portal hypertension, fibrosis, steatosis, neovascularization, and cancer development.
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Affiliation(s)
- Alexandra Balvey
- Laboratory of Translational Control in Liver Disease and Cancer, IDIBAPS Biomedical Research Institute, University of Barcelona, Barcelona, Spain
| | - Mercedes Fernandez
- Laboratory of Translational Control in Liver Disease and Cancer, IDIBAPS Biomedical Research Institute, University of Barcelona, Barcelona, Spain
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Kachaev ZM, Ivashchenko SD, Kozlov EN, Lebedeva LA, Shidlovskii YV. Localization and Functional Roles of Components of the Translation Apparatus in the Eukaryotic Cell Nucleus. Cells 2021; 10:3239. [PMID: 34831461 PMCID: PMC8623629 DOI: 10.3390/cells10113239] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/11/2021] [Accepted: 11/16/2021] [Indexed: 12/15/2022] Open
Abstract
Components of the translation apparatus, including ribosomal proteins, have been found in cell nuclei in various organisms. Components of the translation apparatus are involved in various nuclear processes, particularly those associated with genome integrity control and the nuclear stages of gene expression, such as transcription, mRNA processing, and mRNA export. Components of the translation apparatus control intranuclear trafficking; the nuclear import and export of RNA and proteins; and regulate the activity, stability, and functional recruitment of nuclear proteins. The nuclear translocation of these components is often involved in the cell response to stimulation and stress, in addition to playing critical roles in oncogenesis and viral infection. Many components of the translation apparatus are moonlighting proteins, involved in integral cell stress response and coupling of gene expression subprocesses. Thus, this phenomenon represents a significant interest for both basic and applied molecular biology. Here, we provide an overview of the current data regarding the molecular functions of translation factors and ribosomal proteins in the cell nucleus.
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Affiliation(s)
- Zaur M. Kachaev
- Department of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia; (Z.M.K.); (S.D.I.); (E.N.K.); (L.A.L.)
- Center for Genetics and Life Science, Sirius University of Science and Technology, 354340 Sochi, Russia
| | - Sergey D. Ivashchenko
- Department of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia; (Z.M.K.); (S.D.I.); (E.N.K.); (L.A.L.)
| | - Eugene N. Kozlov
- Department of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia; (Z.M.K.); (S.D.I.); (E.N.K.); (L.A.L.)
| | - Lyubov A. Lebedeva
- Department of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia; (Z.M.K.); (S.D.I.); (E.N.K.); (L.A.L.)
| | - Yulii V. Shidlovskii
- Department of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia; (Z.M.K.); (S.D.I.); (E.N.K.); (L.A.L.)
- Center for Genetics and Life Science, Sirius University of Science and Technology, 354340 Sochi, Russia
- Department of Biology and General Genetics, Sechenov First Moscow State Medical University (Sechenov University), 119992 Moscow, Russia
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10
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Riechert E, Kmietczyk V, Stein F, Schwarzl T, Sekaran T, Jürgensen L, Kamuf-Schenk V, Varma E, Hofmann C, Rettel M, Gür K, Ölschläger J, Kühl F, Martin J, Ramirez-Pedraza M, Fernandez M, Doroudgar S, Méndez R, Katus HA, Hentze MW, Völkers M. Identification of dynamic RNA-binding proteins uncovers a Cpeb4-controlled regulatory cascade during pathological cell growth of cardiomyocytes. Cell Rep 2021; 35:109100. [PMID: 33979607 DOI: 10.1016/j.celrep.2021.109100] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 02/03/2021] [Accepted: 04/16/2021] [Indexed: 11/18/2022] Open
Abstract
RNA-binding proteins (RBPs) control critical aspects of cardiomyocyte function, but the repertoire of active RBPs in cardiomyocytes during the growth response is largely unknown. We define RBPs in healthy and diseased cardiomyocytes at a system-wide level by RNA interactome capture. This identifies 67 cardiomyocyte-specific RBPs, including several contractile proteins. Furthermore, we identify the cytoplasmic polyadenylation element-binding protein 4 (Cpeb4) as a dynamic RBP, regulating cardiac growth both in vitro and in vivo. We identify mRNAs bound to and regulated by Cpeb4 in cardiomyocytes. Cpeb4 regulates cardiac remodeling by differential expression of transcription factors. Among Cpeb4 target mRNAs, two zinc finger transcription factors (Zeb1 and Zbtb20) are discovered. We show that Cpeb4 regulates the expression of these mRNAs and that Cpeb4 depletion increases their expression. Thus, Cpeb4 emerges as a critical regulator of cardiomyocyte function by differential binding to specific mRNAs in response to pathological growth stimulation.
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Affiliation(s)
- Eva Riechert
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Vivien Kmietczyk
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Frank Stein
- Proteomics Core Facility, European Molecular Biology Laboratory (EMBL), Meyerhofstraße 1, 69117 Heidelberg, Germany
| | - Thomas Schwarzl
- European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Thileepan Sekaran
- European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Lonny Jürgensen
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Verena Kamuf-Schenk
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Eshita Varma
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Christoph Hofmann
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Mandy Rettel
- Proteomics Core Facility, European Molecular Biology Laboratory (EMBL), Meyerhofstraße 1, 69117 Heidelberg, Germany
| | - Kira Gür
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Julie Ölschläger
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Friederike Kühl
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Judit Martin
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | | | | | - Shirin Doroudgar
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Raúl Méndez
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, 08028 Barcelona, Spain; Institució Catalana de Recerca I Estudis Avançats (ICREA), 08010 Barcelona, Spain
| | - Hugo A Katus
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Matthias W Hentze
- European Molecular Biology Laboratory, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Mirko Völkers
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany.
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11
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Kozlov E, Shidlovskii YV, Gilmutdinov R, Schedl P, Zhukova M. The role of CPEB family proteins in the nervous system function in the norm and pathology. Cell Biosci 2021; 11:64. [PMID: 33789753 PMCID: PMC8011179 DOI: 10.1186/s13578-021-00577-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 03/19/2021] [Indexed: 12/29/2022] Open
Abstract
Posttranscriptional gene regulation includes mRNA transport, localization, translation, and regulation of mRNA stability. CPEB (cytoplasmic polyadenylation element binding) family proteins bind to specific sites within the 3′-untranslated region and mediate poly- and deadenylation of transcripts, activating or repressing protein synthesis. As part of ribonucleoprotein complexes, the CPEB proteins participate in mRNA transport and localization to different sub-cellular compartments. The CPEB proteins are evolutionarily conserved and have similar functions in vertebrates and invertebrates. In the nervous system, the CPEB proteins are involved in cell division, neural development, learning, and memory. Here we consider the functional features of these proteins in the nervous system of phylogenetically distant organisms: Drosophila, a well-studied model, and mammals. Disruption of the CPEB proteins functioning is associated with various pathologies, such as autism spectrum disorder and brain cancer. At the same time, CPEB gene regulation can provide for a recovery of the brain function in patients with fragile X syndrome and Huntington's disease, making the CPEB genes promising targets for gene therapy.
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Affiliation(s)
- Eugene Kozlov
- Laboratory of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia, 119334
| | - Yulii V Shidlovskii
- Laboratory of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia, 119334.,Department of Biology and General Genetics, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia, 119992
| | - Rudolf Gilmutdinov
- Laboratory of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia, 119334
| | - Paul Schedl
- Laboratory of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia, 119334.,Department of Molecular Biology, Princeton University, Princeton, NJ, 08544-1014, USA
| | - Mariya Zhukova
- Laboratory of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia, 119334.
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12
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Parras A, de Diego-Garcia L, Alves M, Beamer E, Conte G, Jimenez-Mateos EM, Morgan J, Ollà I, Hernandez-Santana Y, Delanty N, Farrell MA, O'Brien DF, Ocampo A, Henshall DC, Méndez R, Lucas JJ, Engel T. Polyadenylation of mRNA as a novel regulatory mechanism of gene expression in temporal lobe epilepsy. Brain 2020; 143:2139-2153. [PMID: 32594159 DOI: 10.1093/brain/awaa168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/27/2020] [Accepted: 04/09/2020] [Indexed: 01/15/2023] Open
Abstract
Temporal lobe epilepsy is the most common and refractory form of epilepsy in adults. Gene expression within affected structures such as the hippocampus displays extensive dysregulation and is implicated as a central pathomechanism. Post-transcriptional mechanisms are increasingly recognized as determinants of the gene expression landscape, but key mechanisms remain unexplored. Here we show, for first time, that cytoplasmic mRNA polyadenylation, one of the post-transcriptional mechanisms regulating gene expression, undergoes widespread reorganization in temporal lobe epilepsy. In the hippocampus of mice subjected to status epilepticus and epilepsy, we report >25% of the transcriptome displays changes in their poly(A) tail length, with deadenylation disproportionately affecting genes previously associated with epilepsy. Suggesting cytoplasmic polyadenylation element binding proteins (CPEBs) being one of the main contributors to mRNA polyadenylation changes, transcripts targeted by CPEBs were particularly enriched among the gene pool undergoing poly(A) tail alterations during epilepsy. Transcripts bound by CPEB4 were over-represented among transcripts with poly(A) tail alterations and epilepsy-related genes and CPEB4 expression was found to be increased in mouse models of seizures and resected hippocampi from patients with drug-refractory temporal lobe epilepsy. Finally, supporting an adaptive function for CPEB4, deletion of Cpeb4 exacerbated seizure severity and neurodegeneration during status epilepticus and the development of epilepsy in mice. Together, these findings reveal an additional layer of gene expression regulation during epilepsy and point to novel targets for seizure control and disease-modification in epilepsy.
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Affiliation(s)
- Alberto Parras
- Centro de Biología Molecular 'Severo Ochoa' (CBMSO) CSIC/UAM, 28049 Madrid, Spain.,Networking Research Center on Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.,Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin D02 YN77, Ireland
| | - Laura de Diego-Garcia
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin D02 YN77, Ireland
| | - Mariana Alves
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin D02 YN77, Ireland
| | - Edward Beamer
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin D02 YN77, Ireland
| | - Giorgia Conte
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin D02 YN77, Ireland
| | - Eva M Jimenez-Mateos
- Discipline of Physiology, School of Medicine, Trinity College Dublin, The University of Dublin D02 R590, Ireland
| | - James Morgan
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin D02 YN77, Ireland
| | - Ivana Ollà
- Centro de Biología Molecular 'Severo Ochoa' (CBMSO) CSIC/UAM, 28049 Madrid, Spain.,Networking Research Center on Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain
| | - Yasmina Hernandez-Santana
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin D02 YN77, Ireland
| | - Norman Delanty
- Beaumont Hospital, Beaumont, Dublin 9, Ireland.,FutureNeuro, SFI Research Centre for Chronic and Rare Neurological Diseases, RCSI, Dublin D02 YN77, Ireland
| | | | | | - Alejandro Ocampo
- Department of Biomedical Sciences, Faculté de Biologie et Médecine, Université de Lausanne, Lausanne, Switzerland
| | - David C Henshall
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin D02 YN77, Ireland.,FutureNeuro, SFI Research Centre for Chronic and Rare Neurological Diseases, RCSI, Dublin D02 YN77, Ireland
| | - Raúl Méndez
- Institute for Research in Biomedicine (IRB), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain
| | - José J Lucas
- Centro de Biología Molecular 'Severo Ochoa' (CBMSO) CSIC/UAM, 28049 Madrid, Spain.,Networking Research Center on Neurodegenerative Diseases (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain
| | - Tobias Engel
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin D02 YN77, Ireland.,FutureNeuro, SFI Research Centre for Chronic and Rare Neurological Diseases, RCSI, Dublin D02 YN77, Ireland
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13
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Arasaki Y, Li M, Akiya T, Nozawa I, Ezura Y, Hayata T. The RNA-binding protein Cpeb4 is a novel positive regulator of osteoclast differentiation. Biochem Biophys Res Commun 2020; 528:621-627. [PMID: 32517870 DOI: 10.1016/j.bbrc.2020.05.089] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 05/14/2020] [Indexed: 01/15/2023]
Abstract
Cytoplasmic polyadenylation element binding (CPEB) proteins are RNA-binding proteins involved in translational regulation of the specific target mRNAs and control function of various organs including brain, liver and hematopoietic system. However, the role of CPEB proteins during osteoclast differentiation remains unclear. Here we show that Cpeb4 is required for RANKL-induced osteoclast differentiation in mouse macrophage-derived RAW264.7 cell line. Cpeb4 mRNA and protein levels are upregulated at the late stage of osteoclast differentiation. Immunofluorescence analysis revealed that Cpeb4 is translocated from cytoplasm to nuclear bodies in response to RANKL stimulation. Inhibition of PI3K-Akt signaling or calcium-NFAT pathways using chemical inhibitors suppressed nuclear localization of Cpeb4. Loss-of-function analysis showed that shRNA-mediated Cpeb4 depletion strongly impaired TRAP-positive osteoclast formation and expression of key differentiation markers including Acp5, Ctsk, Nfatc1 and Dcstamp. These results suggest that Cpeb4 is a positive regulator in osteoclastogenesis downstream of RANKL signaling.
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Affiliation(s)
- Yasuhiro Arasaki
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 287-8510, Japan
| | - Masamichi Li
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 287-8510, Japan
| | - Takuro Akiya
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 287-8510, Japan
| | - Iori Nozawa
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 287-8510, Japan
| | - Yoichi Ezura
- Frontier Research Unit: Skeletal Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo, Tokyo, 113-8510, Japan; Department of Judo Therapy, Faculty of Medical Technology, Teikyo University, 1-1 Toyosatodai, Utsunomiya, Tochigi, 320-8551, Japan
| | - Tadayoshi Hayata
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 287-8510, Japan.
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14
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Cui HS, Joo SY, Cho YS, Kim JB, Seo CH. CPEB1 or CPEB4 knockdown suppresses the TAK1 and Smad signalings in THP-1 macrophage-like cells and dermal fibroblasts. Arch Biochem Biophys 2020; 683:108322. [DOI: 10.1016/j.abb.2020.108322] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 02/21/2020] [Accepted: 02/22/2020] [Indexed: 01/03/2023]
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15
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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: 1.8] [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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16
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Chen HF, Hsu CM, Huang YS. CPEB2-dependent translation of long 3'-UTR Ucp1 mRNA promotes thermogenesis in brown adipose tissue. EMBO J 2018; 37:embj.201899071. [PMID: 30177570 DOI: 10.15252/embj.201899071] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 08/13/2018] [Accepted: 08/15/2018] [Indexed: 12/18/2022] Open
Abstract
Expression of mitochondrial proton transporter uncoupling protein 1 (UCP1) in brown adipose tissue (BAT) is essential for mammalian thermogenesis. While human UCP1 mRNA exists in a long form only, alternative polyadenylation creates two different isoforms in mice with 10% of UCP1 mRNA found in the long form (Ucp1L) and ~90% in the short form (Ucp1S). We generated a mouse model expressing only Ucp1S and found that it showed impaired thermogenesis due to a 60% drop in UCP1 protein levels, suggesting that Ucp1L is more efficiently translated than Ucp1S. In addition, we found that β3 adrenergic receptor signaling promoted the translation of mouse Ucp1L and human Ucp1 in a manner dependent on cytoplasmic polyadenylation element binding protein 2 (CPEB2). CPEB2-knockout mice showed reduced UCP1 levels and impaired thermogenesis in BAT, which was rescued by ectopic expression of CPEB2. Hence, long 3'-UTR Ucp1 mRNA translation activated by CPEB2 is likely conserved and important in humans to produce UCP1 for thermogenesis.
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Affiliation(s)
- Hui-Feng Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Chen-Ming Hsu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yi-Shuian Huang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
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17
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Olfactory-Experience- and Developmental-Stage-Dependent Control of CPEB4 Regulates c-Fos mRNA Translation for Granule Cell Survival. Cell Rep 2018; 21:2264-2276. [PMID: 29166615 DOI: 10.1016/j.celrep.2017.10.100] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 05/13/2017] [Accepted: 10/25/2017] [Indexed: 11/21/2022] Open
Abstract
Mammalian olfactory bulbs (OBs) require continuous replenishment of interneurons (mainly granule cells [GCs]) to support local circuits throughout life. Two spatiotemporally distinct waves of postnatal neurogenesis contribute to expanding and maintaining the GC pool. Although neonate-born GCs have a higher survival rate than adult-born GCs, the molecular mechanism underlying this survival remains unclear. Here, we find that cytoplasmic polyadenylation element-binding protein 4 (CPEB4) acts as a survival factor exclusively for early postnatal GCs. In mice, during the first 2 postnatal weeks, olfactory experience initiated CPEB4-activated c-Fos mRNA translation. In CPEB4-knockout mice, c-FOS insufficiency reduced neurotrophic signaling to impair GC survival and cause OB hypoplasia. Both cyclic AMP responsive element binding protein (CREB)-dependent transcription and CPEB4-promoted translation support c-FOS expression early postnatal OBs but disengage in adult OBs. Activity-related c-FOS synthesis and GC survival are thus developmentally controlled by distinct molecular mechanisms to govern OB growth.
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18
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Zeng M, Li F, Wang L, Chen C, Huang X, Wu X, She W, Zhou L, Tao Z. Downregulated cytoplasmic polyadenylation element-binding protein-4 is associated with the carcinogenesis of head and neck squamous cell carcinoma. Oncol Lett 2017; 15:3226-3232. [PMID: 29435062 DOI: 10.3892/ol.2017.7661] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 11/07/2017] [Indexed: 12/22/2022] Open
Abstract
Cytoplasmic polyadenylation element-binding protein-4 (CPEB4) is involved in several biological processes that are associated with cancer progression. However, it remains unknown whether CPEB4 expression levels are associated with head and neck squamous cell carcinoma (HNSCC). The aim of the present study was to explore the potential function of CPEB4 in HNSCC. The expression of CPEB4 was analyzed in HNSCC from six Gene Expression Omnibus (GEO) datasets. Immunohistochemical staining was conducted to examine CPEB4 protein levels in an HNSCC tissue microarray (TMA). According to the GEO dataset analyses, CPEB4 gene expression was downregulated in HNSCC compared with normal samples (P<0.05). Notably, a statistical difference was observed between different tumor grades (P<0.05). Furthermore, the methylation of the CPEB4 gene in HNSCC was significantly increased compared with that observed in normal samples (P<0.01). The outcome from the TMA demonstrated that CPEB4 protein expression in human HNSCC tumors was significantly decreased compared with normal samples (P<0.05). In addition, the expression of CPEB4 protein was negatively associated with histological grades of HNSCC (P<0.05). The results from the present study suggested that CPEB4 may function as a tumor suppressor gene in HNSCC, which identifies the potential value of CPEB4 in predicting prognosis of HNSCC. Hypermethylation of the CPEB4 gene may be responsible for the downregulation of CPEB4 expression in HNSCC and result in tumorigenesis.
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Affiliation(s)
- Manli Zeng
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Fen Li
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China.,Research Institute of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Lei Wang
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Chen Chen
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China.,Research Institute of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Xiaolin Huang
- Department of Otolaryngology-Head and Neck Surgery, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Xingyu Wu
- Department of Otolaryngology-Head and Neck Surgery, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Wensheng She
- Department of Otolaryngology-Head and Neck Surgery, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Lin Zhou
- Department of Otolaryngology-Head and Neck Surgery, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Zezhang Tao
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
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19
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Cortés-Guiral D, Pastor-Iodate C, Díaz Del Arco C, Del Puerto-Nevado L, Fernández-Aceñero MJ. CPEB4 immunohistochemical expression is associated to prognosis in stage IV colorectal carcinoma. Pathol Res Pract 2017; 213:639-642. [PMID: 28551384 DOI: 10.1016/j.prp.2017.04.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/27/2017] [Accepted: 04/20/2017] [Indexed: 12/15/2022]
Abstract
The cytoplasmic polyadenylation element binding protein 4 (CPEB4) is a RNA binding protein and translational regulator. It has been associated with tumor growth, vascularization and invasion and with tumor progression in breast, pancreas and lung carcinomas. To the best of our knowledge only one previous report has analyzed the prognostic value of CPEB4 in an experimental model of colorectal carcinoma. We have reviewed the files of patients with stage IV colorectal carcinoma metastatic to the liver. All the patients had received chemotherapy followed by hepatic metastasis resection and subsequent resection of the colon (liver-first approach). We have gathered demographic, analytical and morphological data of the primary tumors. We have performed immunohistochemical analysis of CPEB4 expression in these tumors and analyzed the potential prognostic value of this protein. 50 patients fulfilled inclusion criteria for the present study. All of them received preoperative chemotherapy based on platinum and also postoperative chemotherapy, with or without targeted drugs (18% received anti-epidermal growth factor receptor (EGFR) drugs and 24% anti-vascular endothelial growth factor receptor (VEGFR) drugs. 66% of the primaries were of sigmoid-rectal origin. CPEB4 expression was mainly cytoplasmic and it was scored as intense in 46% of the patients. Survival analysis revealed a significant association between progression free survival (PFS) and overall survival (OS) and CPEB4 immunohistochemical expression, which was independent in the multivariate analysis. CPEB4 behaves as a significant predictor of prognosis in stage IV colorectal carcinoma. The existence of CPEB4 specific inhibitors can open a new way for targeted therapy. Larger prospective studies are needed to confirm our promising results.
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Affiliation(s)
- D Cortés-Guiral
- Departments of Surgery, Fundación Jiménez Díaz, Madrid, Spain
| | - C Pastor-Iodate
- Departments of Surgery, Fundación Jiménez Díaz, Madrid, Spain
| | - C Díaz Del Arco
- Surgical Pathology, Hospital Clínico San Carlos, Madrid, Spain
| | | | - M J Fernández-Aceñero
- Departments of Surgery, Fundación Jiménez Díaz, Madrid, Spain; Surgical Pathology, Hospital Clínico San Carlos, Madrid, Spain.
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20
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Rouhana L, Tasaki J, Saberi A, Newmark PA. Genetic dissection of the planarian reproductive system through characterization of Schmidtea mediterranea CPEB homologs. Dev Biol 2017; 426:43-55. [PMID: 28434803 PMCID: PMC5544531 DOI: 10.1016/j.ydbio.2017.04.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 03/30/2017] [Accepted: 04/18/2017] [Indexed: 01/30/2023]
Abstract
Cytoplasmic polyadenylation is a mechanism of mRNA regulation prevalent in metazoan germ cells; it is largely dependent on Cytoplasmic Polyadenylation Element Binding proteins (CPEBs). Two CPEB homologs were identified in the planarian Schmidtea mediterranea. Smed-CPEB1 is expressed in ovaries and yolk glands of sexually mature planarians, and required for oocyte and yolk gland development. In contrast, Smed-CPEB2 is expressed in the testes and the central nervous system; its function is required for spermatogenesis as well as non-autonomously for development of ovaries and accessory reproductive organs. Transcriptome analysis of CPEB knockdown animals uncovered a comprehensive collection of molecular markers for reproductive structures in S. mediterranea, including ovaries, testes, yolk glands, and the copulatory apparatus. Analysis by RNA interference revealed contributions for a dozen of these genes during oogenesis, spermatogenesis, or capsule formation. We also present evidence suggesting that Smed-CPEB2 promotes translation of Neuropeptide Y-8, a prohormone required for planarian sexual maturation. These findings provide mechanistic insight into potentially conserved processes of germ cell development, as well as events involved in capsule deposition by flatworms.
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Affiliation(s)
- Labib Rouhana
- Department of Biological Sciences, Wright State University, 3640 Colonel Glenn Highway, Dayton, OH 45435, USA; Howard Hughes Medical Institute and Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, 601 S. Goodwin Ave., Urbana, IL 61801, USA.
| | - Junichi Tasaki
- Department of Biological Sciences, Wright State University, 3640 Colonel Glenn Highway, Dayton, OH 45435, USA
| | - Amir Saberi
- Howard Hughes Medical Institute and Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, 601 S. Goodwin Ave., Urbana, IL 61801, USA
| | - Phillip A Newmark
- Howard Hughes Medical Institute and Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, 601 S. Goodwin Ave., Urbana, IL 61801, USA
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21
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Circadian- and UPR-dependent control of CPEB4 mediates a translational response to counteract hepatic steatosis under ER stress. Nat Cell Biol 2017; 19:94-105. [PMID: 28092655 DOI: 10.1038/ncb3461] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 12/09/2016] [Indexed: 12/18/2022]
Abstract
The cytoplasmic polyadenylation element-binding (CPEB) proteins regulate pre-mRNA processing and translation of CPE-containing mRNAs in early embryonic development and synaptic activity. However, specific functions in adult organisms are poorly understood. Here we show that CPEB4 is required for adaptation to high-fat-diet- and ageing-induced endoplasmic reticulum (ER) stress, and subsequent hepatosteatosis. Stress-activated liver CPEB4 expression is dual-mode regulated. First, Cpeb4 mRNA transcription is controlled by the circadian clock, and then its translation is regulated by the unfolded protein response (UPR) through upstream open reading frames within the 5'UTR. Thus, the CPEB4 protein is synthesized only following ER stress but the induction amplitude is circadian. In turn, CPEB4 activates a second wave of UPR translation required to maintain ER and mitochondrial homeostasis. Our results suggest that combined transcriptional and translational Cpeb4 regulation generates a 'circadian mediator', which coordinates hepatic UPR activity with periods of high ER-protein-folding demand. Accordingly, CPEB4 deficiency results in non-alcoholic fatty liver disease.
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He X, Lin X, Cai M, Fan D, Chen X, Wang L, Wu X, Lan P, Wang J. High expression of cytoplasmic polyadenylation element-binding protein 4 correlates with poor prognosis of patients with colorectal cancer. Virchows Arch 2016; 470:37-45. [PMID: 27771769 DOI: 10.1007/s00428-016-2037-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 09/05/2016] [Accepted: 10/13/2016] [Indexed: 12/11/2022]
Abstract
Cytoplasmic polyadenylation element-binding protein 4 (CPEB4), a zinc-finger-containing sequence-specific RNA-binding protein, has been associated with tumor proliferation, invasion, and migration. Expression of CPEB4 and its prognostic significance in human colorectal cancer (CRC) have not been studied. The aim of the present study was to investigate expression of CPEB4 and its prognostic significance in CRC. Expression of CPEB4 in CRC tissues from two independent cohorts was examined by immunohistochemistry. Prognostic significance was analyzed using receiver operating characteristic curve analysis, Kaplan-Meier curves, and Cox regression analysis. High expression of CPEB4 was observed in 14.8 % of CRCs in the training cohort and 12.2 % of CRCs in the validation cohort. High expression of CPEB4 was significantly correlated with the pM classification, TNM stage, and poorer overall survival in both cohorts. Through multivariate Cox regression analysis, high expression of CPEB4 was found to be an independent prognostic biomarker for overall survival in CRC patients. High expression of CPEB4 may be an independent and useful biomarker for predicting the poor survival of patients with CRC.
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Affiliation(s)
- Xiaosheng He
- Department of Colorectal Surgery,the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China.,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China
| | - Xutao Lin
- Department of Colorectal Surgery,the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China.,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China
| | - Muyan Cai
- State Key Laboratory of Oncology in South China, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, 510060, China.,Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, 510060, China
| | - Dejun Fan
- Department of Colorectal Surgery,the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China.,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China
| | - Xiuting Chen
- Department of Colorectal Surgery,the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China.,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China
| | - Lei Wang
- Department of Colorectal Surgery,the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China.,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China
| | - Xiaojian Wu
- Department of Colorectal Surgery,the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China.,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China
| | - Ping Lan
- Department of Colorectal Surgery,the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China. .,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China.
| | - Jianping Wang
- Department of Colorectal Surgery,the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China. .,Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, the Sixth Affiliated Hospital, Sun Yat-sen University, 26 Yuancun Er Heng Road, Guangzhou, Guangdong, 510655, China.
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Shin J, Salameh JS, Richter JD. Impaired neurodevelopment by the low complexity domain of CPEB4 reveals a convergent pathway with neurodegeneration. Sci Rep 2016; 6:29395. [PMID: 27381259 PMCID: PMC4933966 DOI: 10.1038/srep29395] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 06/16/2016] [Indexed: 12/12/2022] Open
Abstract
CPEB4 is an RNA binding protein expressed in neuronal tissues including brain and spinal cord. CPEB4 has two domains: one that is structured for RNA binding and one that is unstructured and low complexity that has no known function. Unstructured low complexity domains (LCDs) in proteins are often found in RNA-binding proteins and have been implicated in motor neuron degenerative diseases such as amyotrophic lateral sclerosis, indicating that these regions mediate normal RNA processing as well as pathological events. While CPEB4 null knockout mice are normal, animals expressing only the CPEB4 LCD are neonatal lethal with impaired mobility that display defects in neuronal development such as reduced motor axon branching and abnormal neuromuscular junction formation. Although full-length CPEB4 is nearly exclusively cytoplasmic, the CPEB4 LCD forms nucleolar aggregates and CPEB4 LCD-expressing animals have altered ribosomal RNA biogenesis, ribosomal protein gene expression, and elevated levels of stress response genes such as the actin-bundling protein DRR1, which impedes neurite outgrowth. Some of these features share similarities with other LCD-related neurodegenerative disease. Most strikingly, DRR1 appears to be a common focus of several neurodevelopmental and neurodegenerative disorders. Our study reveals a possible molecular convergence between a neurodevelopmental defect and neurodegeneration mediated by LCDs.
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Affiliation(s)
- Jihae Shin
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Johnny S Salameh
- Department of Neurology, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Joel D Richter
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
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Chen W, Hu Z, Li XZ, Li JL, Xu XK, Li HG, Liu Y, Liu BH, Jia WH, Li FC. CPEB4 interacts with Vimentin and involves in progressive features and poor prognosis of patients with astrocytic tumors. Tumour Biol 2015; 37:5075-87. [PMID: 26546435 DOI: 10.1007/s13277-015-3975-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 08/21/2015] [Indexed: 01/16/2023] Open
Abstract
Cytoplasmic polyadenylation element binding protein 4 (CPEB4) is a regulator of gene transcription and has been reported to be associated with biological malignancy in cancers. However, it is unclear whether CPEB4 has any clinical significance in patients with astrocytic tumors, and mechanisms that CPEB4 contribute to progression of astrocytic tumors remain largely unknown. Here, correlation between CPEB4 expression and prognosis of patients with astrocytic tumors were explored by using qPCR, WB and IHC, and X-tile, SPSS software. Cell lines U251 MG and A172 were used to study CPEB4's function and mechanisms. Co-immunoprecipitation, mass spectrometry, immunofluorescent assay, and western blot were performed to observe the interaction between CPEB4 and Vimentin. CPEB4 mRNA and protein levels were markedly elevated in 12/12 astrocytic tumors in comparison to paratumor. High expression of CPEB4 was significantly correlated with clinical progressive futures and work as an independent adverse prognostic factor for overall survival of patients with astrocytic tumors (relative risk 4.5, 95 % CI 2.1-11.2, p = 0.001). Moreover, knockdown of CPEB4 in astrocytic tumor cells inhibited their proliferation ability , clonogenicity, and invasiveness. Five candidate proteins, GRP78, Mortalin, Keratin, Vimentin, and β-actin, were identified, and the interaction between CPEB4 and Vimentin was finally confirmed. Downregulation of CPEB4 could reduce the protein expression of Vimentin. Our studies first validated that CPEB4 interacts with Vimentin and indicated that high CPEB4 expression in astrocytic tumors correlates closely with a clinically aggressive future, and that CPEB4 might represent a valuable prognostic marker for patients with astrocytic tumors.
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Affiliation(s)
- Wei Chen
- Department of Neurosurgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 West Road of Riverside, Guangzhou, 510120, China
- Department of Neurosurgery, Guangzhou Women and Children's Medical Center, No. 9 Jinsui Road, Guangzhou, 510623, China
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, China
| | - Zhen Hu
- Department of Neurosurgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 West Road of Riverside, Guangzhou, 510120, China
| | - Xi-Zhao Li
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, China
| | - Jun-Liang Li
- Department of Neurosurgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 West Road of Riverside, Guangzhou, 510120, China
- Department of Neurosurgery, Guangzhou Women and Children's Medical Center, No. 9 Jinsui Road, Guangzhou, 510623, China
| | - Xin-Ke Xu
- Department of Neurosurgery, Guangzhou Women and Children's Medical Center, No. 9 Jinsui Road, Guangzhou, 510623, China
| | - Hai-Gang Li
- Department of Pathology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 West Road of Riverside, Guangzhou, 510120, China
| | - Yeqing Liu
- Department of Pathology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 West Road of Riverside, Guangzhou, 510120, China
| | - Bai-Hui Liu
- Department of General Surgery, The Second Affiliated Hospital of GuangDong Pharmaceutical University, No. 167 Xingang Xi Road, Guangzhou, 510275, China
| | - Wei-Hua Jia
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, China.
| | - Fang-Cheng Li
- Department of Neurosurgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, No. 107 West Road of Riverside, Guangzhou, 510120, China.
- Department of Neurosurgery, Guangzhou Women and Children's Medical Center, No. 9 Jinsui Road, Guangzhou, 510623, China.
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25
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Abstract
Endoplasmic reticulum (ER) stress is an intricate mechanism that mediates numerous responses during brain ischemia, thus being essential to determine the fate of neurons. In recent years, studies of the mechanisms of brain ischemic injury have centered on ER stress, glutamate excitotoxicity, dysfunction of mitochondria, inflammatory reactions, calcium overload and death receptor pathways. The role of ER stress is highly important. In addition to resulting in neuronal cell death through calcium toxicity and apoptotic pathways, ER stress also triggers a series of adaptive responses including unfolded protein response (UPR), autophagy, the expression of pro-survival proteins and the enhancement of ER self-repair ability, leading to less ischemic brain damage. This paper provides an overview of recent advances in understanding of the relations between ER stress and brain ischemia.
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Affiliation(s)
- Yingchao Su
- a Department of Neurology, the Second Affiliated Hospital of Harbin Medical University , Harbin 150086 , China
| | - Feng Li
- a Department of Neurology, the Second Affiliated Hospital of Harbin Medical University , Harbin 150086 , China
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26
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Huang W, Li H, Luo R. The microRNA-1246 promotes metastasis in non-small cell lung cancer by targeting cytoplasmic polyadenylation element-binding protein 4. Diagn Pathol 2015. [PMID: 26209100 PMCID: PMC4514963 DOI: 10.1186/s13000-015-0366-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Background The microRNAs present a class of non-coding RNAs which are usually implicated in tumor biology. Recent report has unraveled that a novel member of microRNA family called miR-1246. However, the functional role and molecular mechanisms of miR-1246 in non-small cell lung cancer (NSCLC) is still elusive. Methods Using RT-PCR, luciferase reporter, mRNA microarrays, invasion and migration assays, we investigated the potential role of miR-1246 in the pathogenesis of NSCLC. Results In this study, we showed that miR-1246 markedly promoted NSCLC cell migration and invasion. Meanwhile, we found that cytoplasmic polyadenylation element binding protein 4 (CPEB4) might be involved and serve as a direct target of miR-1246 in NSCLC. CPEB4 knockdown substantially enhanced NSCLC migration and invasion resembling the effect of miR-1246 in NSCLC. CPEB4 is also frequently downregulated in NSCLC and decreased CPEB4 expression correlated with poor survival. Conclusions These results suggested that the miR-1246 may promote cell metastasis by targeting CPEB4. Meanwhile, the level of CPEB4 could be used as a potential marker in NSCLC patients. Our findings unraveled novel functions of miR-1246 in lung cancer cells and shed light on NSCLC prognosis. Electronic supplementary material The online version of this article (doi:10.1186/s13000-015-0366-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Weihua Huang
- TCM-Integrated Hospital, Southern Medical University, Cancer Center, NO.13 Shiliugang Road, Haizhu District, Guangzhou, Guangdong, 510315, China
| | - Huifen Li
- Department of Chemotherapy, Zhongshan People's Hospital, Zhongshan, Guangdong, 528400, China
| | - Rongcheng Luo
- TCM-Integrated Hospital, Southern Medical University, Cancer Center, NO.13 Shiliugang Road, Haizhu District, Guangzhou, Guangdong, 510315, China.
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27
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Chang YW, Huang YS. Arsenite-activated JNK signaling enhances CPEB4-Vinexin interaction to facilitate stress granule assembly and cell survival. PLoS One 2014; 9:e107961. [PMID: 25237887 PMCID: PMC4169592 DOI: 10.1371/journal.pone.0107961] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 08/18/2014] [Indexed: 01/15/2023] Open
Abstract
Stress granules (SGs) are compartmentalized messenger ribonucleoprotein particles (mRNPs) where translationally repressed mRNAs are stored when cells encounter environmental stress. Cytoplasmic polyadenylation element-binding protein (CPEB)4 is a sequence-specific RNA-binding protein and translational regulator. In keeping with the results obtained from the study of other RNA-binding proteins, we found CPEB4 localized in SGs in various arsenite-treated cells. In this study, we identified that Vinexin, a CPEB4-interacting protein, is a novel component of SGs. Vinexin is a SH3-domain-containing adaptor protein and affects cell migration through its association with Vinculin to localize at focal adhesions (FAs). Unexpectedly, Vinexin is translocated from FAs to SGs under arsenite-induced stress. The recruitment of Vinexin to SGs depends on its interaction with CPEB4 and influences SG formation and cell survival. Arsenite-activated c-Jun N-terminal kinase (JNK) signaling enhances the association between CPEB4 and Vinexin, which consequently facilitates SG localization of Vinexin. Taken together, this study uncovers a novel interaction between a translational regulator and an adaptor protein to influence SG assembly and cell survival.
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Affiliation(s)
- Yu-Wei Chang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Yi-Shuian Huang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
- * E-mail:
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28
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Afroz T, Skrisovska L, Belloc E, Guillén-Boixet J, Méndez R, Allain FHT. A fly trap mechanism provides sequence-specific RNA recognition by CPEB proteins. Genes Dev 2014; 28:1498-514. [PMID: 24990967 PMCID: PMC4083092 DOI: 10.1101/gad.241133.114] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
How CPEB RNA-binding proteins regulate cytoplasmic polyadenylation and translation is poorly understood. Allain and colleagues report the structures of the tandem RNA recognition motifs (RRMs) of two human paralogs (CPEB1 and CPEB4) in their free and RNA-bound states. Structural and functional studies reveal how RNA binding by CPEB proteins leads to an optimal positioning of the N-terminal and zinc-binding domains at the 3′ UTR, which favors the nucleation of ribonucleoprotein complexes for translation regulation. This study provides the molecular basis for the translational regulatory circuit established by CPEB proteins. Cytoplasmic changes in polyA tail length is a key mechanism of translational control and is implicated in germline development, synaptic plasticity, cellular proliferation, senescence, and cancer progression. The presence of a U-rich cytoplasmic polyadenylation element (CPE) in the 3′ untranslated regions (UTRs) of the responding mRNAs gives them the selectivity to be regulated by the CPE-binding (CPEB) family of proteins, which recognizes RNA via the tandem RNA recognition motifs (RRMs). Here we report the solution structures of the tandem RRMs of two human paralogs (CPEB1 and CPEB4) in their free and RNA-bound states. The structures reveal an unprecedented arrangement of RRMs in the free state that undergo an original closure motion upon RNA binding that ensures high fidelity. Structural and functional characterization of the ZZ domain (zinc-binding domain) of CPEB1 suggests a role in both protein–protein and protein–RNA interactions. Together with functional studies, the structures reveal how RNA binding by CPEB proteins leads to an optimal positioning of the N-terminal and ZZ domains at the 3′ UTR, which favors the nucleation of the functional ribonucleoprotein complexes for translation regulation.
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Affiliation(s)
- Tariq Afroz
- Institute of Molecular Biology and Biophysics, Eidgenössische Technische Hochschule (ETH) Zurich, CH-8093 Zürich, Switzerland
| | - Lenka Skrisovska
- Institute of Molecular Biology and Biophysics, Eidgenössische Technische Hochschule (ETH) Zurich, CH-8093 Zürich, Switzerland
| | - Eulàlia Belloc
- Institute for Research in Biomedicine, 08028 Barcelona, Spain
| | | | - Raúl Méndez
- Institute for Research in Biomedicine, 08028 Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain
| | - Frédéric H-T Allain
- Institute of Molecular Biology and Biophysics, Eidgenössische Technische Hochschule (ETH) Zurich, CH-8093 Zürich, Switzerland
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Ivshina M, Lasko P, Richter JD. Cytoplasmic polyadenylation element binding proteins in development, health, and disease. Annu Rev Cell Dev Biol 2014; 30:393-415. [PMID: 25068488 DOI: 10.1146/annurev-cellbio-101011-155831] [Citation(s) in RCA: 154] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The cytoplasmic polyadenylation element binding (CPEB) proteins are sequence-specific mRNA binding proteins that control translation in development, health, and disease. CPEB1, the founding member of this family, has become an important model for illustrating general principles of translational control by cytoplasmic polyadenylation in gametogenesis, cancer etiology, synaptic plasticity, learning, and memory. Although the biological functions of the other members of this protein family in vertebrates are just beginning to emerge, it is already evident that they, too, mediate important processes, such as cancer etiology and higher cognitive function. In Drosophila, the CPEB proteins Orb and Orb2 play key roles in oogenesis and in neuronal function, as do related proteins in Caenorhabditis elegans and Aplysia. We review the biochemical features of the CPEB proteins, discuss their activities in several biological systems, and illustrate how understanding CPEB activity in model organisms has an important impact on neurological disease.
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Affiliation(s)
- Maria Ivshina
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605;
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30
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Charlesworth A, Meijer HA, de Moor CH. Specificity factors in cytoplasmic polyadenylation. WILEY INTERDISCIPLINARY REVIEWS-RNA 2014; 4:437-61. [PMID: 23776146 PMCID: PMC3736149 DOI: 10.1002/wrna.1171] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 04/08/2013] [Accepted: 04/09/2013] [Indexed: 12/12/2022]
Abstract
Poly(A) tail elongation after export of an messenger RNA (mRNA) to the cytoplasm is called cytoplasmic polyadenylation. It was first discovered in oocytes and embryos, where it has roles in meiosis and development. In recent years, however, has been implicated in many other processes, including synaptic plasticity and mitosis. This review aims to introduce cytoplasmic polyadenylation with an emphasis on the factors and elements mediating this process for different mRNAs and in different animal species. We will discuss the RNA sequence elements mediating cytoplasmic polyadenylation in the 3' untranslated regions of mRNAs, including the CPE, MBE, TCS, eCPE, and C-CPE. In addition to describing the role of general polyadenylation factors, we discuss the specific RNA binding protein families associated with cytoplasmic polyadenylation elements, including CPEB (CPEB1, CPEB2, CPEB3, and CPEB4), Pumilio (PUM2), Musashi (MSI1, MSI2), zygote arrest (ZAR2), ELAV like proteins (ELAVL1, HuR), poly(C) binding proteins (PCBP2, αCP2, hnRNP-E2), and Bicaudal C (BICC1). Some emerging themes in cytoplasmic polyadenylation will be highlighted. To facilitate understanding for those working in different organisms and fields, particularly those who are analyzing high throughput data, HUGO gene nomenclature for the human orthologs is used throughout. Where human orthologs have not been clearly identified, reference is made to protein families identified in man.
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Affiliation(s)
- Amanda Charlesworth
- Department of Integrative Biology, University of Colorado Denver, Denver, CO, USA
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31
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Tsai LY, Chang YW, Lin PY, Chou HJ, Liu TJ, Lee PT, Huang WH, Tsou YL, Huang YS. CPEB4 knockout mice exhibit normal hippocampus-related synaptic plasticity and memory. PLoS One 2013; 8:e84978. [PMID: 24386439 PMCID: PMC3875571 DOI: 10.1371/journal.pone.0084978] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 11/27/2013] [Indexed: 11/18/2022] Open
Abstract
Regulated RNA translation is critical to provide proteins needed to maintain persistent modification of synaptic strength, which underlies the molecular basis of long-term memory (LTM). Cytoplasmic polyadenylation element-binding proteins (CPEBs) are sequence-specific RNA-binding proteins and regulate translation in various tissues. All four CPEBs in vertebrates are expressed in the brain, including the hippocampal neurons, suggesting their potential roles in translation-dependent plasticity and memory. Although CPEB1 and CPEB3 have been shown to control specific kinds of hippocampus-related LTM, the role of CPEB2 and CPEB4 in learning and memory remains elusive. Thus, we generated CPEB4 knockout (KO) mice and analyzed them using several behavioral tests. No difference was found in the anxiety level, motor coordination, hippocampus-dependent learning and memory between the KO mice and their wild-type (WT) littermates. Electrophysiological recordings of multiple forms of synaptic plasticity in the Schaffer collateral pathway-CA1 neurons also showed normal responses in the KO hippocampal slices. Morphological analyses revealed that the CPEB4-lacking pyramidal neurons possessed slightly elongated dendritic spines. Unlike its related family members, CPEB1 and CPEB3, CPEB4 seems to be dispensable for hippocampus-dependent plasticity, learning and memory.
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Affiliation(s)
- Li-Yun Tsai
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yu-Wei Chang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Pei-Yi Lin
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Hsin-Jung Chou
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Ta-Jen Liu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- Institute of Neuroscience, National Yang-Ming University, Taipei, Taiwan
| | - Ping-Tao Lee
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Wen-Hsuan Huang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yueh-Liang Tsou
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yi-Shuian Huang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
- Institute of Neuroscience, National Yang-Ming University, Taipei, Taiwan
- * E-mail:
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32
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Tian Q, Liang L, Ding J, Zha R, Shi H, Wang Q, Huang S, Guo W, Ge C, Chen T, Li J, He X. MicroRNA-550a acts as a pro-metastatic gene and directly targets cytoplasmic polyadenylation element-binding protein 4 in hepatocellular carcinoma. PLoS One 2012; 7:e48958. [PMID: 23145039 PMCID: PMC3492136 DOI: 10.1371/journal.pone.0048958] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 10/02/2012] [Indexed: 12/22/2022] Open
Abstract
MicroRNAs (miRNAs) are a class of small, non-coding RNA molecules that are often found at chromosomal breakpoints and play a vital role in human cancer. Our previous study found that miR-550a, a frequently amplified miRNA on 7p14.3, was upregulated in hepatocellular carcinoma (HCC). However, the possible functions and molecular mechanisms of miR-550a in HCC remain unknown. In this study, gain-of-function and loss-of-function assays revealed that miR-550a markedly promoted HCC cell migration and invasion. In addition, we discovered that cytoplasmic polyadenylation element binding protein 4 (CPEB4) was a potential target of miR-550a in HCC. Further analyses showed that knockdown of CPEB4 expression significantly facilitated HCC cell migration and invasion, which phenocopied the effects of miR-550a on HCC cells. Moreover, a decrease in CPEB4 expression mediated miR-550a-induced liver cancer cell migration and invasion. Interestingly, CPEB4 is frequently downregulated in HCC, and its expression levels correlate with the overall survival of HCC patients. Together, these results suggested that this newly identified miR-550a-CPEB4 axis may be involved in HCC cell metastasis. Moreover, the expression levels of CPEB4 could be used to predict outcomes in HCC patients. Our findings provide novel potential targets for HCC therapy and prognosis.
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Affiliation(s)
- Qi Tian
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Linhui Liang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jie Ding
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ruopeng Zha
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Haibing Shi
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qifeng Wang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shenglin Huang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Weijie Guo
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chao Ge
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Taoyang Chen
- Qi Dong Liver Cancer Institute, Qi Dong, Jiangsu, China
| | - Jinjun Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xianghuo He
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- * E-mail:
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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: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [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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Jeon SJ, Han SH, Yang SI, Choi JW, Kwon KJ, Park SH, Kim HY, Cheong JH, Ryu JH, Ko KH, Wells DG, Shin CY. Positive feedback regulation of Akt-FMRP pathway protects neurons from cell death. J Neurochem 2012; 123:226-38. [DOI: 10.1111/j.1471-4159.2012.07886.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Chao HW, Lai YT, Lu YL, Lin CL, Mai W, Huang YS. NMDAR signaling facilitates the IPO5-mediated nuclear import of CPEB3. Nucleic Acids Res 2012; 40:8484-98. [PMID: 22730302 PMCID: PMC3458550 DOI: 10.1093/nar/gks598] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Cytoplasmic polyadenylation element-binding protein (CPEB)3 is a nucleocytoplasm-shuttling RNA-binding protein and predominantly resides in the cytoplasm where it represses target RNA translation. When translocated into the nucleus, CPEB3 binds to Stat5b and downregulates Stat5b-dependent transcription. In neurons, the activation of N-methyl-d-aspartate receptors (NMDARs) accumulates CPEB3 in the nucleus and redistributes CPEB3 in the nucleocytoplasmic compartments to control gene expression. Nonetheless, it is unclear which karyopherin drives the nuclear import of CPEB3 and which transport direction is most affected by NMDA stimulation to increase the nuclear pool of CPEB3. Here, we have identified that the karyopherins, IPO5 and CRM1, facilitate CPEB3 translocation by binding to RRM1 and a leucine-containing motif of CPEB3, respectively. NMDAR signaling increases RanBP1 expression and reduces the level of cytoplasmic GTP-bound Ran. These changes enhance CPEB3-IPO5 interaction, which consequently accelerates the nuclear import of CPEB3. This study uncovers a novel NMDA-regulated import pathway to facilitate the nuclear translocation of CPEB3.
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Affiliation(s)
- Hsu-Wen Chao
- Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
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Fox CS, White CC, Lohman K, Heard-Costa N, Cohen P, Zhang Y, Johnson AD, Emilsson V, Liu CT, Chen YDI, Taylor KD, Allison M, Budoff M, Rotter JI, Carr JJ, Hoffmann U, Ding J, Cupples LA, Liu Y. Genome-wide association of pericardial fat identifies a unique locus for ectopic fat. PLoS Genet 2012; 8:e1002705. [PMID: 22589742 PMCID: PMC3349742 DOI: 10.1371/journal.pgen.1002705] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 03/27/2012] [Indexed: 12/18/2022] Open
Abstract
Pericardial fat is a localized fat depot associated with coronary artery calcium and myocardial infarction. We hypothesized that genetic loci would be associated with pericardial fat independent of other body fat depots. Pericardial fat was quantified in 5,487 individuals of European ancestry from the Framingham Heart Study (FHS) and the Multi-Ethnic Study of Atherosclerosis (MESA). Genotyping was performed using standard arrays and imputed to ∼2.5 million Hapmap SNPs. Each study performed a genome-wide association analysis of pericardial fat adjusted for age, sex, weight, and height. A weighted z-score meta-analysis was conducted, and validation was obtained in an additional 3,602 multi-ethnic individuals from the MESA study. We identified a genome-wide significant signal in our primary meta-analysis at rs10198628 near TRIB2 (MAF 0.49, p = 2.7×10-08). This SNP was not associated with visceral fat (p = 0.17) or body mass index (p = 0.38), although we observed direction-consistent, nominal significance with visceral fat adjusted for BMI (p = 0.01) in the Framingham Heart Study. Our findings were robust among African ancestry (n = 1,442, p = 0.001), Hispanic (n = 1,399, p = 0.004), and Chinese (n = 761, p = 0.007) participants from the MESA study, with a combined p-value of 5.4E-14. We observed TRIB2 gene expression in the pericardial fat of mice. rs10198628 near TRIB2 is associated with pericardial fat but not measures of generalized or visceral adiposity, reinforcing the concept that there are unique genetic underpinnings to ectopic fat distribution. Pericardial fat is a localized fat depot associated with coronary artery calcium and myocardial infarction. To test whether genetic loci are associated with pericardial fat independent of other body fat depots, we measured pericardial fat in 5,487 individuals of European ancestry. After performing an unbiased screen using genome-wide association, we identified a genome-wide significant signal in our primary meta-analysis at rs10198628 near TRIB2 (MAF 0.49, p = 2.7×10-08). This SNP was not associated with visceral fat (p = 0.17) or body mass index (p = 0.38). Our findings were robust among multi-ethnic participants from the MESA study, with a combined p-value of 5.4E-14. We observed TRIB2 gene expression in the pericardial fat of mice. rs10198628 near TRIB2 is associated with pericardial fat but not measures of generalized or visceral adiposity, reinforcing the concept that there are unique genetic underpinnings to ectopic fat distribution.
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Affiliation(s)
- Caroline S. Fox
- Framingham Heart Study, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, United States of America
- Center for Population Studies, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, United States of America
- Division of Endocrinology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail: (CSF); (YL)
| | - Charles C. White
- Framingham Heart Study, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, United States of America
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, United States of America
| | - Kurt Lohman
- Department of Epidemiology and Prevention, Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Nancy Heard-Costa
- Department of Neurology, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Paul Cohen
- Division of Cardiovascular Medicine and Department of Cancer Biology, Brigham and Women's Hospital and Dana Farber Cancer Institute, Boston, Massachusetts, United States of America
| | - Yingying Zhang
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, Massachusetts, United States of America
| | - Andrew D. Johnson
- Framingham Heart Study, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, United States of America
- Center for Population Studies, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, United States of America
| | | | - Ching-Ti Liu
- Framingham Heart Study, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, United States of America
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, United States of America
| | - Y.-D. Ida Chen
- Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Kent D. Taylor
- Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Matthew Allison
- Department of Preventive Medicine, University of California San Diego, La Jolla, California, United States of America
| | - Matthew Budoff
- Los Angeles Biomedical Research Institute, Torrance, California, United States of America
| | | | - Jerome I. Rotter
- Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - J. Jeffrey Carr
- Departments of Radiologic Sciences, Internal Medicine-Cardiology, and Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Udo Hoffmann
- Cardiac MR, PET, CT Program and the Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts, United States of America
| | - Jingzhong Ding
- Department of Internal Medicine/Geriatrics, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
| | - L. Adrienne Cupples
- Framingham Heart Study, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, United States of America
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, United States of America
| | - Yongmei Liu
- Department of Epidemiology and Prevention, Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States of America
- * E-mail: (CSF); (YL)
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CPEB-mediated ZO-1 mRNA localization is required for epithelial tight-junction assembly and cell polarity. Nat Commun 2012; 3:675. [PMID: 22334078 PMCID: PMC4334452 DOI: 10.1038/ncomms1678] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Accepted: 01/11/2012] [Indexed: 01/06/2023] Open
Abstract
CPEB is a translational regulatory sequence-specific RNA-binding protein that controls germ cell development. Here we show that CPEB heterozygous female mice are fertile but contain disorganized mammary epithelial cells, in which zonal occludens-1 and claudin-3, apical tight-junction proteins, are mislocalized. CPEB depletion from mammary epithelial cells disrupts zonal occludens-1 apical localization and tight-junction distribution; conversely, ectopic expression of CPEB enhances zonal occludens-1 localization. CPEB and zonal occludens-1 mRNA are co-localized apically and zonal occludens-1 3' untranslated region-binding sites for CPEB are necessary for RNA localization. In a three-dimensional culture system that models lumen-containing mammary ducts, depletion of CPEB or zonal occludens-1 impairs central cavity formation, indicating a loss of cell polarity. Cavity formation in zonal occludens-1-depleted cells is rescued when they are transduced with zonal occludens-1 mRNA containing, but not lacking, CPEB-binding sites. Our data demonstrate that CPEB-mediated zonal occludens-1 mRNA localization is essential for tight-junction assembly and mammary epithelial cell polarity.
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CPEB2-eEF2 interaction impedes HIF-1α RNA translation. EMBO J 2011; 31:959-71. [PMID: 22157746 DOI: 10.1038/emboj.2011.448] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2011] [Accepted: 11/15/2011] [Indexed: 12/21/2022] Open
Abstract
Translation of mRNA into protein proceeds in three phases: initiation, elongation, and termination. Regulated translation allows the prompt production of selective proteins in response to physiological needs and is often controlled by sequence-specific RNA-binding proteins that function at initiation. Whether the elongation phase of translation can be modulated individually by trans-acting factors to synthesize polypeptides at variable rates remains to be determined. Here, we demonstrate that the RNA-binding protein, cytoplasmic polyadenylation element binding protein (CPEB)2, interacts with the elongation factor, eEF2, to reduce eEF2/ribosome-triggered GTP hydrolysis in vitro and slow down peptide elongation of CPEB2-bound RNA in vivo. The interaction of CPEB2 with eEF2 downregulates HIF-1α RNA translation under normoxic conditions; however, when cells encounter oxidative stress, CPEB2 dissociates from HIF-1α RNA, leading to rapid synthesis of HIF-1α for hypoxic adaptation. This study delineates the molecular mechanism of CPEB2-repressed translation and presents a unique model for controlling transcript-selective translation at elongation.
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Sinnamon JR, Czaplinski K. mRNA trafficking and local translation: the Yin and Yang of regulating mRNA localization in neurons. Acta Biochim Biophys Sin (Shanghai) 2011; 43:663-70. [PMID: 21749992 DOI: 10.1093/abbs/gmr058] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Localized translation and the requisite trafficking of the mRNA template play significant roles in the nervous system including the establishment of dendrites and axons, axon path-finding, and synaptic plasticity. We provide a brief review on the regulation of localizing mRNA in mammalian neurons through critical post-translational modifications of the factors involved. These examples highlight the relationship between mRNA trafficking and the translational regulation of trafficked mRNAs and provide insight into how extracellular signals target these events during signal transduction.
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Affiliation(s)
- John R Sinnamon
- Program in Neuroscience, Stony Brook University, NY 11794, USA
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Abstract
Ischemic insults on neurons trigger excessive, pathological glutamate release that causes Ca²⁺ overload resulting in neuronal cell death (excitotoxicity). The Ca²⁺/calmodulin (CaM)-dependent protein kinase II (CaMKII) is a major mediator of physiological excitatory glutamate signals underlying neuronal plasticity and learning. Glutamate stimuli trigger autophosphorylation of CaMKII at T286, a process that makes the kinase "autonomous" (partially active independent from Ca²⁺ stimulation) and that is required for forms of synaptic plasticity. Recent studies suggested autonomous CaMKII activity also as potential drug target for post-insult neuroprotection, both after glutamate insults in neuronal cultures and after focal cerebral ischemia in vivo. However, CaMKII and other members of the CaM kinase family have been implicated in regulation of both neuronal death and survival. Here, we discuss past findings and possible mechanisms of CaM kinase functions in excitotoxicity and cerebral ischemia, with a focus on CaMKII and its regulation.
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