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Zheng Y, Lin S, Chen M, Xu L, Huang H. Regulation of N 6-methyladenosine modification in erythropoiesis and thalassemia. Clin Genet 2024; 106:3-12. [PMID: 38488342 DOI: 10.1111/cge.14518] [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: 11/23/2023] [Revised: 02/21/2024] [Accepted: 02/23/2024] [Indexed: 06/04/2024]
Abstract
In eukaryotic RNA, N6-methyladenosine (m6A) is a prevalent form of methylation modification. The m6A modification process is reversible and dynamic, written by m6A methyltransferase complex, erased by m6A demethylase, and recognized by m6A binding proteins. Through mediating RNA stability, decay, alternative splicing, and translation processes, m6A modification regulates gene expression at the post-transcriptional level. Erythropoiesis is the process of hematopoietic stem cells undergoing proliferation, a series of differentiation and maturation to form red blood cells (RBCs). Thalassemia is a common monogenic disease characterized by excessive production of ineffective RBCs in the peripheral circulation, resulting in hemolytic anemia. Increasing evidence suggests that m6A modification plays a crucial role in erythropoiesis. In this review, we comprehensively summarize the function of m6A modification in erythropoiesis and further generalize the mechanism of m6A modification regulating ineffective erythropoiesis and fetal hemoglobin expression. The purpose is to improve the understanding of the pathogenesis of erythroid dysplasia and offer new perspectives for the diagnosis and treatment of thalassemia.
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Affiliation(s)
- Yanping Zheng
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Provincial Key Laboratory of Prenatal Diagnosis and Birth Defect, Fujian Medical University, Fuzhou, China
| | - Siyang Lin
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Provincial Key Laboratory of Prenatal Diagnosis and Birth Defect, Fujian Medical University, Fuzhou, China
- The School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
| | - Meihuan Chen
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Provincial Key Laboratory of Prenatal Diagnosis and Birth Defect, Fujian Medical University, Fuzhou, China
- The School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
- Fujian Clinical Research Center for Maternal-Fetal Medicine, Fuzhou, China
- National Key Obstetric Clinical Specialty Construction Institution of China, Fuzhou, China
| | - Liangpu Xu
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Provincial Key Laboratory of Prenatal Diagnosis and Birth Defect, Fujian Medical University, Fuzhou, China
- The School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
- Fujian Clinical Research Center for Maternal-Fetal Medicine, Fuzhou, China
- National Key Obstetric Clinical Specialty Construction Institution of China, Fuzhou, China
| | - Hailong Huang
- Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Provincial Key Laboratory of Prenatal Diagnosis and Birth Defect, Fujian Medical University, Fuzhou, China
- The School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
- Fujian Clinical Research Center for Maternal-Fetal Medicine, Fuzhou, China
- National Key Obstetric Clinical Specialty Construction Institution of China, Fuzhou, China
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Fomo KN, Perumal N, Manicam C, Pfeiffer N, Grus FH. Neuroretinal Cell Culture Model as a Tool for the Development of New Therapeutic Approaches for Oxidative Stress-Induced Ocular Diseases, with a Focus on Glaucoma. Cells 2024; 13:775. [PMID: 38727311 PMCID: PMC11083839 DOI: 10.3390/cells13090775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/15/2024] [Accepted: 04/29/2024] [Indexed: 05/13/2024] Open
Abstract
Glaucoma is a heterogeneous group of optic neuropathies characterized by a progressive degeneration of the retinal ganglion cells (RGCs), leading to irreversible vision loss. Nowadays, the traditional therapeutic approach to glaucoma consists of lowering the intraocular pressure (IOP), which does not address the neurodegenerative features of the disease. Besides animal models of glaucoma, there is a considerable need for in vitro experimental models to propose new therapeutic strategies for this ocular disease. In this study, we elucidated the pathological mechanisms leading to neuroretinal R28 cell death after exposure to glutamate and hydrogen peroxide (H2O2) in order to develop new therapeutic approaches for oxidative stress-induced retinal diseases, including glaucoma. We were able to show that glutamate and H2O2 can induce a decrease in R28 cell viability in a concentration-dependent manner. A cell viability of about 42% was found after exposure to 3 mM of glutamate and about 56% after exposure to 100 µM of H2O2 (n = 4). Label-free quantitative mass spectrometry analysis revealed differential alterations of 193 and 311 proteins in R28 cells exposed to 3 mM of glutamate and 100 µM of H2O2, respectively (FDR < 1%; p < 0.05). Bioinformatics analysis indicated that the protein changes were associated with the dysregulation of signaling pathways, which was similar to those observed in glaucoma. Thus, the proteomic alteration induced by glutamate was associated with the inhibition of the PI3K/AKT signaling pathway. On the other hand, H2O2-induced toxicity in R28 cells was linked to the activation of apoptosis signaling and the inhibition of the mTOR and ERK/MAPK signaling pathways. Furthermore, the data show a similarity in the inhibition of the EIF2 and AMPK signaling pathways and the activation of the sumoylation and WNT/β-catenin signaling pathways in both groups. Our findings suggest that the exposure of R28 cells to glutamate and H2O2 could induce glaucoma-like neurodegenerative features and potentially provide a suitable tool for the development of new therapeutic strategies for retinal diseases.
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Affiliation(s)
| | | | | | | | - Franz H. Grus
- Experimental and Translational Ophthalmology, Department of Ophthalmology, University Medical Centre of the Johannes Gutenberg University Mainz, 55131 Mainz, Germany; (K.N.F.); (N.P.); (C.M.); (N.P.)
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3
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Shi H, Zhao Y. Modulation of Tau Pathology in Alzheimer's Disease by Dietary Bioactive Compounds. Int J Mol Sci 2024; 25:831. [PMID: 38255905 PMCID: PMC10815728 DOI: 10.3390/ijms25020831] [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: 10/31/2023] [Revised: 01/02/2024] [Accepted: 01/02/2024] [Indexed: 01/24/2024] Open
Abstract
Tau is a microtubule-associated protein essential for microtubule assembly and stability in neurons. The abnormal intracellular accumulation of tau aggregates is a major characteristic of brains from patients with Alzheimer's disease (AD) and other tauopathies. In AD, the presence of neurofibrillary tangles (NFTs), which is composed of hyperphosphorylated tau protein, is positively correlated with the severity of the cognitive decline. Evidence suggests that the accumulation and aggregation of tau cause synaptic dysfunction and neuronal degeneration. Thus, the prevention of abnormal tau phosphorylation and elimination of tau aggregates have been proposed as therapeutic strategies for AD. However, currently tau-targeting therapies for AD and other tauopathies are limited. A number of dietary bioactive compounds have been found to modulate the posttranslational modifications of tau, including phosphorylation, small ubiquitin-like modifier (SUMO) mediated modification (SUMOylation) and acetylation, as well as inhibit tau aggregation and/or promote tau degradation. The advantages of using these dietary components over synthetic substances in AD prevention and intervention are their safety and accessibility. This review summarizes the mechanisms leading to tau pathology in AD and highlights the effects of bioactive compounds on the hyperphosphorylation, aggregation and clearance of tau protein. The potential of using these bioactive compounds for AD prevention and intervention is also discussed.
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Affiliation(s)
- Huahua Shi
- Department of Bioengineering, Harbin Institute of Technology, Weihai 264209, China;
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yan Zhao
- Department of Bioengineering, Harbin Institute of Technology, Weihai 264209, China;
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
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Wang X, Liu T, Huang Y, Dai Y, Lin H. Regulation of transforming growth factor-β signalling by SUMOylation and its role in fibrosis. Open Biol 2021; 11:210043. [PMID: 34753319 PMCID: PMC8580444 DOI: 10.1098/rsob.210043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Fibrosis is an abnormal healing process that only repairs the structure of an organ after injury and does not address damaged functions. The pathogenesis of fibrosis is multifactorial and highly complex; numerous signalling pathways are involved in this process, with the transforming growth factor-β (TGF-β) signalling pathway playing a central role. TGF-β regulates the generation of myofibroblasts and the epithelial-mesenchymal transition by regulating transcription and translation of downstream genes and precisely regulating fibrogenesis. The TGF-β signalling pathway can be modulated by various post-translational modifications, of which SUMOylation has been shown to play a key role. In this review, we focus on the function of SUMOylation in canonical and non-canonical TGF-β signalling and its role in fibrosis, providing promising therapeutic strategies for fibrosis.
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Affiliation(s)
- Xinyi Wang
- First Clinical Medical School, Nanchang University, Nanchang 330006, Jiangxi Province, People's Republic of China
| | - Ting Liu
- Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University, Nanchang 330006, Jiangxi Province, People's Republic of China
| | - Yifei Huang
- First Clinical Medical School, Nanchang University, Nanchang 330006, Jiangxi Province, People's Republic of China
| | - Yifeng Dai
- Second Clinical Medical School, Nanchang University, Nanchang 330006, Jiangxi Province, People's Republic of China
| | - Hui Lin
- Department of Pathophysiology, School of Basic Medical Sciences, Nanchang University, Nanchang 330006, Jiangxi Province, People's Republic of China
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Maraschi A, Gumina V, Dragotto J, Colombrita C, Mompeán M, Buratti E, Silani V, Feligioni M, Ratti A. SUMOylation Regulates TDP-43 Splicing Activity and Nucleocytoplasmic Distribution. Mol Neurobiol 2021; 58:5682-5702. [PMID: 34390468 PMCID: PMC8599232 DOI: 10.1007/s12035-021-02505-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 07/22/2021] [Indexed: 12/13/2022]
Abstract
The nuclear RNA-binding protein TDP-43 forms abnormal cytoplasmic aggregates in the brains of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) patients and several molecular mechanisms promoting TDP-43 cytoplasmic mislocalization and aggregation have been proposed, including defects in nucleocytoplasmic transport, stress granules (SG) disassembly and post-translational modifications (PTM). SUMOylation is a PTM which regulates a variety of cellular processes and, similarly to ubiquitination, targets lysine residues. To investigate the possible regulatory effects of SUMOylation on TDP-43 activity and trafficking, we first assessed that TDP-43 is SUMO-conjugated in the nuclear compartment both covalently and non-covalently in the RRM1 domain at the predicted lysine 136 and SUMO-interacting motif (SIM, 106–110 residues), respectively. By using the SUMO-mutant TDP-43 K136R protein, we demonstrated that SUMOylation modifies TDP-43 splicing activity, specifically exon skipping, and influences its sub-cellular localization and recruitment to SG after oxidative stress. When promoting deSUMOylation by SENP1 enzyme over-expression or by treatment with the cell-permeable SENP1 peptide TS-1, the cytoplasmic localization of TDP-43 increased, depending on its SUMOylation. Moreover, deSUMOylation by TS-1 peptide favoured the formation of small cytoplasmic aggregates of the C-terminal TDP-43 fragment p35, still containing the SUMO lysine target 136, but had no effect on the already formed p25 aggregates. Our data suggest that TDP-43 can be post-translationally modified by SUMOylation which may regulate its splicing function and trafficking, indicating a novel and druggable mechanism to explore as its dysregulation may lead to TDP-43 pathological aggregation in ALS and FTD.
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Affiliation(s)
- AnnaMaria Maraschi
- Department of Neurology, Stroke Unit and Laboratory of Neuroscience, Istituto Auxologico Italiano, IRCCS, Piazzale Brescia 20, 20149 Milan, Italy
| | - Valentina Gumina
- Department of Neurology, Stroke Unit and Laboratory of Neuroscience, Istituto Auxologico Italiano, IRCCS, Piazzale Brescia 20, 20149 Milan, Italy
| | - Jessica Dragotto
- Laboratory of Neuronal Cell Signaling, EBRI Rita Levi-Montalcini Foundation, Viale Regina Elena 295, 00161 Rome, Italy
| | - Claudia Colombrita
- Department of Neurology, Stroke Unit and Laboratory of Neuroscience, Istituto Auxologico Italiano, IRCCS, Piazzale Brescia 20, 20149 Milan, Italy
| | - Miguel Mompeán
- “Rocasolano” Institute for Physical Chemistry, Spanish National Research Council, Serrano 119, 28006 Madrid, Spain
| | - Emanuele Buratti
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Padriciano 99, 34149 Trieste, Italy
| | - Vincenzo Silani
- Department of Neurology, Stroke Unit and Laboratory of Neuroscience, Istituto Auxologico Italiano, IRCCS, Piazzale Brescia 20, 20149 Milan, Italy
- Aldo Ravelli” Center for Neurotechnology and Experimental Brain Therapeutics, Università Degli Studi Di Milano, Via A. di Rudinì 8, 20142 Milan, Italy
- Department of Pathophysiology and Transplantation, Dino Ferrari” Center, Università Degli Studi Di Milano, Via F. Sforza 35, 20122 Milan, Italy
| | - Marco Feligioni
- Laboratory of Neuronal Cell Signaling, EBRI Rita Levi-Montalcini Foundation, Viale Regina Elena 295, 00161 Rome, Italy
- Department of Neurorehabilitation Sciences, Casa Di Cura del Policlinico, Via Giuseppe Dezza 48, 20144 Milan, Italy
| | - Antonia Ratti
- Department of Neurology, Stroke Unit and Laboratory of Neuroscience, Istituto Auxologico Italiano, IRCCS, Piazzale Brescia 20, 20149 Milan, Italy
- Department of Medical Biotechnology and Translational Medicine, Università Degli Studi Di Milano, Via Fratelli Cervi 93, 20090 Segrate, Milan Italy
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Yu F, Wei J, Cui X, Yu C, Ni W, Bungert J, Wu L, He C, Qian Z. Post-translational modification of RNA m6A demethylase ALKBH5 regulates ROS-induced DNA damage response. Nucleic Acids Res 2021; 49:5779-5797. [PMID: 34048572 PMCID: PMC8191756 DOI: 10.1093/nar/gkab415] [Citation(s) in RCA: 94] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/28/2021] [Accepted: 04/30/2021] [Indexed: 01/04/2023] Open
Abstract
Faithful genome integrity maintenance plays an essential role in cell survival. Here, we identify the RNA demethylase ALKBH5 as a key regulator that protects cells from DNA damage and apoptosis during reactive oxygen species (ROS)-induced stress. We find that ROS significantly induces global mRNA N6-methyladenosine (m6A) levels by modulating ALKBH5 post-translational modifications (PTMs), leading to the rapid and efficient induction of thousands of genes involved in a variety of biological processes including DNA damage repair. Mechanistically, ROS promotes ALKBH5 SUMOylation through activating ERK/JNK signaling, leading to inhibition of ALKBH5 m6A demethylase activity by blocking substrate accessibility. Moreover, ERK/JNK/ALKBH5-PTMs/m6A axis is activated by ROS in hematopoietic stem/progenitor cells (HSPCs) in vivo in mice, suggesting a physiological role of this molecular pathway in the maintenance of genome stability in HSPCs. Together, our study uncovers a molecular mechanism involving ALKBH5 PTMs and increased mRNA m6A levels that protect genomic integrity of cells in response to ROS.
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Affiliation(s)
- Fang Yu
- Department of Medicine, UF Health Cancer Center, University of Florida, Gainesville, FL 32610, USA
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL 32610, USA
| | - Jiangbo Wei
- Department of Chemistry, Department of Biochemistry and Molecular Biology, and Institute for Biophysical Dynamics, The University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA
- Howard Hughes Medical Institute, The University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA
| | - Xiaolong Cui
- Department of Chemistry, Department of Biochemistry and Molecular Biology, and Institute for Biophysical Dynamics, The University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA
- Howard Hughes Medical Institute, The University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA
| | - Chunjie Yu
- Department of Medicine, UF Health Cancer Center, University of Florida, Gainesville, FL 32610, USA
| | - Wei Ni
- Department of Molecular Genetics and Microbiology, UF Genetic Institute, University of Florida, FL 32610, USA
| | - Jörg Bungert
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL 32610, USA
| | - Lizi Wu
- Department of Molecular Genetics and Microbiology, UF Genetic Institute, University of Florida, FL 32610, USA
| | - Chuan He
- Department of Chemistry, Department of Biochemistry and Molecular Biology, and Institute for Biophysical Dynamics, The University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA
- Howard Hughes Medical Institute, The University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA
| | - Zhijian Qian
- Department of Medicine, UF Health Cancer Center, University of Florida, Gainesville, FL 32610, USA
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL 32610, USA
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7
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Desmet KLJ, Marei WFA, Richard C, Sprangers K, Beemster GTS, Meysman P, Laukens K, Declerck K, Vanden Berghe W, Bols PEJ, Hue I, Leroy JLMR. Oocyte maturation under lipotoxic conditions induces carryover transcriptomic and functional alterations during post-hatching development of good-quality blastocysts: novel insights from a bovine embryo-transfer model. Hum Reprod 2021; 35:293-307. [PMID: 32112081 DOI: 10.1093/humrep/dez248] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 10/09/2019] [Indexed: 12/24/2022] Open
Abstract
STUDY QUESTION Does oocyte maturation under lipolytic conditions have detrimental carry-over effects on post-hatching embryo development of good-quality blastocysts after transfer? SUMMARY ANSWER Surviving, morphologically normal blastocysts derived from bovine oocytes that matured under lipotoxic conditions exhibit long-lasting cellular dysfunction at the transcriptomic and metabolic levels, which coincides with retarded post-hatching embryo development. WHAT IS KNOWN ALREADY There is increasing evidence showing that following maturation in pathophysiologically relevant lipotoxic conditions (as in obesity or metabolic syndrome), surviving blastocysts of good (transferable) morphological quality have persistent transcriptomic and epigenetic alteration even when in vitro embryo culture takes place under standard conditions. However, very little is known about subsequent development in the uterus after transfer. STUDY DESIGN, SIZE, DURATION Bovine oocytes were matured in vitro in the presence of pathophysiologically relevant, high non-esterified fatty acid (NEFA) concentrations (HIGH PA), or in basal NEFA concentrations (BASAL) as a physiological control. Eight healthy multiparous non-lactating Holstein cows were used for embryo transfers. Good-quality blastocysts (pools of eight) were transferred per cow, and cows were crossed over for treatments in the next replicate. Embryos were recovered 7 days later and assessed for post-hatching development, phenotypic features and gene expression profile. Blastocysts from solvent-free and NEFA-free maturation (CONTROL) were also tested for comparison. PARTICIPANTS/MATERIALS, SETTING, METHODS Recovered Day 14 embryos were morphologically assessed and dissected into embryonic disk (ED) and extraembryonic tissue (EXT). Samples of EXT were cultured for 24 h to assess cellular metabolic activity (glucose and pyruvate consumption and lactate production) and embryos' ability to signal for maternal recognition of pregnancy (interferon-τ secretion; IFN-τ). ED and EXT samples were subjected to RNA sequencing to evaluate the genome-wide transcriptome patterns. MAIN RESULTS AND THE ROLE OF CHANCE The embryo recovery rate at Day 14 p.i. was not significantly different among treatment groups (P > 0.1). However, higher proportions of HIGH PA embryos were retarded in growth (in spherical stage) compared to the more elongated tubular stage embryos in the BASAL group (P < 0.05). Focusing on the normally developed tubular embryos in both groups, HIGH PA exposure resulted in altered cellular metabolism and altered transcriptome profile particularly in pathways related to redox-regulating mechanisms, apoptosis, cellular growth, interaction and differentiation, energy metabolism and epigenetic mechanisms, compared to BASAL embryos. Maturation under BASAL conditions did not have any significant effects on post-hatching development and cellular functions compared to CONTROL. LARGE-SCALE DATA The datasets of RNA sequencing analysis are available in the NCBI's Gene Expression Omnibus (GEO) repository, series accession number GSE127889 (https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE127889). Datasets of differentially expressed genes and their gene ontology functions are available in the Mendeley datasets at http://dx.doi.org/10.17632/my2z7dvk9j.2. LIMITATIONS, REASONS FOR CAUTION The bovine model was used here to allow non-invasive embryo transfer and post-hatching recovery on Day 14. There are physiological differences in some characteristics of post-hatching embryo development between human and cows, such as embryo elongation and trophoblastic invasion. However, the main carry-over effects of oocyte maturation under lipolytic conditions described here are evident at the cellular level and therefore may also occur during post-hatching development in other species including humans. In addition, post-hatching development was studied here under a healthy uterine environment to focus on carry-over effects originating from the oocyte, whereas additional detrimental effects may be induced by maternal metabolic disorders due to adverse changes in the uterine microenvironment. RNA sequencing results were not verified by qPCR, and no solvent control was included. WIDER IMPLICATIONS OF THE FINDINGS Our observations may increase the awareness of the importance of maternal metabolic stress at the level of the preovulatory oocyte in relation to carry-over effects that may persist in the transferrable embryos. It should further stimulate new research about preventive and protective strategies to optimize maternal metabolic health around conception to maximize embryo viability and thus fertility outcome. STUDY FUNDING/COMPETING INTEREST(S) This study was supported by the Flemish Research Fund (FWO grant 11L8716N and FWO project 42/FAO10300/6541). The authors declare there are no conflicts of interest.
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Affiliation(s)
- Karolien L J Desmet
- Laboratory of Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, 2610 Wilrijk, Belgium
| | - Waleed F A Marei
- Laboratory of Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, 2610 Wilrijk, Belgium.,Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, 12211 Giza, Egypt
| | - Christophe Richard
- UMR Biologie du Développement et Reproduction, Institut National de la Recherche Agronomique (INRA), École Nationale Vétérinaire d'Alford, Université Paris-Saclay, 78352 Jouy-en-Josas, France
| | - Katrien Sprangers
- Integrated Molecular Plant Physiology Research Group (IMPRES), Department of Biology, University of Antwerp, 2020 Antwerp, Belgium
| | - Gerrit T S Beemster
- Integrated Molecular Plant Physiology Research Group (IMPRES), Department of Biology, University of Antwerp, 2020 Antwerp, Belgium
| | - Pieter Meysman
- Biomedical Informatics Research Center Antwerp, Department of Mathematics and Computer Science, University of Antwerp, 2610 Wilrijk, Belgium
| | - Kris Laukens
- Biomedical Informatics Research Center Antwerp, Department of Mathematics and Computer Science, University of Antwerp, 2610 Wilrijk, Belgium
| | - Ken Declerck
- Laboratory of Protein Science, Proteomics and Epigenetic Signaling, Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium
| | - Wim Vanden Berghe
- Laboratory of Protein Science, Proteomics and Epigenetic Signaling, Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium
| | - Peter E J Bols
- Laboratory of Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, 2610 Wilrijk, Belgium
| | - Isabelle Hue
- UMR Biologie du Développement et Reproduction, Institut National de la Recherche Agronomique (INRA), École Nationale Vétérinaire d'Alford, Université Paris-Saclay, 78352 Jouy-en-Josas, France
| | - Jo L M R Leroy
- Laboratory of Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, 2610 Wilrijk, Belgium
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Li P, Jing H, Wang Y, Yuan L, Xiao H, Zheng Q. SUMO modification in apoptosis. J Mol Histol 2020; 52:1-10. [PMID: 33225418 PMCID: PMC7790789 DOI: 10.1007/s10735-020-09924-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 10/23/2020] [Indexed: 12/15/2022]
Abstract
Apoptosis and clearance of dead cells is highly evolutionarily conserved from nematode to humans, which is crucial to the growth and development of multicellular organism. Fail to remove apoptotic cells often lead to homeostasis imbalance, fatal autoimmune diseases, and neurodegenerative diseases. Small ubiquitin-related modifiers (SUMOs) modification is a post-translational modification of ubiquitin proteins mediated by the sentrin-specific proteases (SENPs) family. SUMO modification is widely involved in many cellular biological process, and abnormal SUMO modification is also closely related to many major human diseases. Recent researches have revealed that SUMO modification event occurs during apoptosis and clearance of apoptotic cells, and plays an important role in the regulation of apoptotic signaling pathways. This review summarizes some recent progress in the revelation of regulatory mechanisms of these pathways and provides some potential researching hotpots of the SUMO modification regulation to apoptosis.
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Affiliation(s)
- Peiyao Li
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in the Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Huiru Jing
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in the Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Yanzhe Wang
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in the Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Lei Yuan
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in the Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Hui Xiao
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in the Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Qian Zheng
- Key Laboratory of the Ministry of Education for Medicinal Plant Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in the Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China.
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9
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Buccarello L, Dragotto J, Iorio F, Hassanzadeh K, Corbo M, Feligioni M. The pivotal role of SUMO-1-JNK-Tau axis in an in vitro model of oxidative stress counteracted by the protective effect of curcumin. Biochem Pharmacol 2020; 178:114066. [PMID: 32502496 DOI: 10.1016/j.bcp.2020.114066] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/27/2020] [Accepted: 05/29/2020] [Indexed: 12/15/2022]
Abstract
Oxidative stress is a toxic cellular condition, strictly related to inflammation and known to be a common feature of many neurodegenerative diseases. The imbalanced redox state modifies several molecular processes including protein SUMOylation, JNK and Tau protein activation, important actors in Alzheimer's disease. In this study, we showed a strong interaction among SUMO-1-JNK-Tau proteins and their molecular targets in an in vitro model (SHSY5Y cell line) of oxidative stress in which a significant reduction of cell viability and an augmented cell death was induced by increased doses of H2O2. The evoked oxidative stress led to a deficiency in the degradation system showing altered levels of Caspase-3, LC3BII/I and Ubiquitin. Curcumin, a natural compound with anti-oxidant and anti-inflammatory effects, demonstrated to tackle oxidative stress re-equilibrating SUMO-1, JNK and Tau functions. Importantly, 5 μM of curcumin induced an efficient recovery of cell viability, a reduction of cell death and a normalization of altered protein degradation marker levels. Interestingly, we found that H2O2 treatment induced a strong co-localization of SUMO-1-p-JNK-Tau proteins in nuclear bodies (NBs) and that curcumin was able to reduce these nuclear aggregates. These results highlight the SUMO-1-JNK-Tau axis key role in oxidative stress and the protective effect of curcumin against this pathological event, focusing on the importance of SUMO/deSUMOylation balance to regulate essential cellular processes.
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Affiliation(s)
- Lucia Buccarello
- Laboratory of Neuropharmacology, EBRI Rita Levi-Montalcini Foundation, Rome, Italy
| | - Jessica Dragotto
- Laboratory of Neuropharmacology, EBRI Rita Levi-Montalcini Foundation, Rome, Italy
| | - Federico Iorio
- Laboratory of Neuropharmacology, EBRI Rita Levi-Montalcini Foundation, Rome, Italy
| | - Kambiz Hassanzadeh
- Laboratory of Neuropharmacology, EBRI Rita Levi-Montalcini Foundation, Rome, Italy; Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Massimo Corbo
- Department of Neurorehabilitation Sciences, Casa Cura Policlinico, Milan, Italy
| | - Marco Feligioni
- Laboratory of Neuropharmacology, EBRI Rita Levi-Montalcini Foundation, Rome, Italy; Department of Neurorehabilitation Sciences, Casa Cura Policlinico, Milan, Italy.
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10
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Wada H, Suzuki D, Niikura T. Regulation of ALS-Associated SOD1 Mutant SUMOylation and Aggregation by SENP and PIAS Family Proteins. J Mol Neurosci 2020; 70:2007-2014. [PMID: 32462635 DOI: 10.1007/s12031-020-01604-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 05/19/2020] [Indexed: 12/11/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease specific to motor neurons. Pathogenic mutations in an ALS-associated gene encoding superoxide dismutase 1 (SOD1) have been identified in familial ALS (fALS) cases. SOD1 with fALS-linked mutations is prone to form cytotoxic aggregates that cause cellular dysfunction. We previously demonstrated that the modification of SOD1 by small ubiquitin-like modifier (SUMO) 3 enhances the aggregation of fALS-linked SOD1 mutants. SUMOylation is a reversible post-translational modification targeting lysine residues. SUMO conjugation is mediated by the enzymes E1, E2, and E3, and deconjugation is catalyzed by deSUMOylation enzymes. To understand the process of SOD1 aggregation, we examined the involvement of protein inhibitor of activated STAT (PIAS) family and sentrin-specific protease (SENP) family proteins in the SUMOylation of SOD1 mutants. We found that all four types of PIAS family proteins, E3 ligase of SUMOylation, increased SUMOylation of SOD1 mutants. Among three SENP family proteins tested, deSUMOylation enzymes, SENP1, exhibited the most efficient deconjugation effect. In co-expression experiments, PIASy and SENP1 increased and decreased the number of cells exhibiting SOD1-mutant aggregation, respectively, confirming the effect of these enzymes on SOD1 aggregation. These findings suggest that regulation of SUMOylation affects the pathogenesis of ALS.
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Affiliation(s)
- Harmony Wada
- Department of Information and Communication Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo, 102-8554, Japan
| | - Dan Suzuki
- Department of Information and Communication Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo, 102-8554, Japan
| | - Takako Niikura
- Department of Information and Communication Sciences, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo, 102-8554, Japan.
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11
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Qu F, Xu W, Deng Z, Xie Y, Tang J, Chen Z, Luo W, Xiong D, Zhao D, Fang J, Zhou Z, Liu Z. Fish c-Jun N-Terminal Kinase (JNK) Pathway Is Involved in Bacterial MDP-Induced Intestinal Inflammation. Front Immunol 2020; 11:459. [PMID: 32292404 PMCID: PMC7134542 DOI: 10.3389/fimmu.2020.00459] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 02/28/2020] [Indexed: 01/01/2023] Open
Abstract
The c-Jun NH2-terminal kinases (JNKs) are an evolutionarily conserved family of serine/threonine protein kinases that play critical roles in the pathological process in species ranging from insects to mammals. However, the function of JNKs in bacteria-induced intestinal inflammation is still poorly understood. In this study, a fish JNK (CiJNK) pathway was identified, and its potential roles in bacterial muramyl dipeptide (MDP)-induced intestinal inflammation were investigated in Ctenopharyngodon idella. The present CiJNK was found to possess a conserved dual phosphorylation motif (TPY) in a serine/threonine protein kinase (S_TKc) domain and to contain several potential immune-related transcription factor binding sites, including nuclear factor kappa B (NF-κB), activating protein 1 (AP-1), and signal transducer and activator of downstream transcription 3 (STAT3), in its 5′ flanking regions. Quantitative real-time PCR results revealed that the mRNA levels of the JNK pathway genes in the intestine were significantly upregulated after challenge with a bacterial pathogen (Aeromonas hydrophila) and MDP in a time-dependent manner. Additionally, the JNK pathway was found to be involved in regulating the MDP-induced expression levels of inflammatory cytokines (IL-6, IL-8, and TNF-α) in the intestine of grass carp. Moreover, the nutritional dipeptide carnosine and Ala–Gln could effectively alleviate MDP-induced intestinal inflammation by regulating the intestinal expression of JNK pathway genes and inflammatory cytokines in grass carp. Finally, fluorescence microscopy and dual-reporter assays indicated that CiJNK could associate with CiMKK4 and CiMKK7 involved in the regulation of the AP-1 signaling pathway. Overall, these results provide the first experimental demonstration that the JNK signaling pathway is involved in the intestinal immune response to MDP challenge in C. idella, which may provide new insight into the pathogenesis of inflammatory bowel disease.
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Affiliation(s)
- Fufa Qu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Wenqian Xu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Zhangren Deng
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Yifang Xie
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Jianzhou Tang
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Zhiguo Chen
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Wenjie Luo
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Ding Xiong
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Dafang Zhao
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Jiamei Fang
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Zhigang Zhou
- Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhen Liu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China.,Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
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12
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Liu B, Wang D, Luo E, Hou J, Qiao Y, Yan G, Wang Q, Tang C. Role of TG2-Mediated SERCA2 Serotonylation on Hypoxic Pulmonary Vein Remodeling. Front Pharmacol 2020; 10:1611. [PMID: 32116663 PMCID: PMC7026497 DOI: 10.3389/fphar.2019.01611] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 12/10/2019] [Indexed: 12/12/2022] Open
Abstract
Sarco-endoplasmic reticulum Ca2+ ATPase (SERCA) pumps take up Ca2+ from the cytoplasm to maintain the balance of intracellular Ca2+. A decline in expression or activity of SERCA results in persistent store-operated calcium entry (SOCE). In cardiomyocytes as well as vascular smooth muscle cells (SMCs), SERCA2 acts as an important regulator of calcium cycling. The purpose of this study is to identify and better understand the role of transglutaminases2 (TG2) as a key factor involved in SERCA2 serotonination (s-SERCA2) and to elucidate the underlying mechanism of action. Human pulmonary venous smooth muscle cell in normal pulmonary lobe were isolated and cultured in vitro. Establishment of hypoxic pulmonary hypertension model in wild type and TG2 knockout mice. SERCA2 serotonylation was analyzed by co-(immunoprecipitation) IP when the TG2 gene silenced or overexpressed under normoxia and hypoxia in vivo and in vitro. Intracellular calcium ion was measured by using Fluo-4AM probe under normoxia and hypoxia. Real-time (RT)-PCR and Western blot analyzed expression of TG2, TRPC1, and TRPC6 under normoxia and hypoxia. Bioactivity of cells were analyzed by using Cell Counting Kit (CCK)-8, flow cytometry, wound healing, RT-PCR, and Western blot under PST-2744 and cyclopiazonic acid. We confirmed that 1) hypoxia enhanced the expression and activity of TG2, and 2) hypoxia increased the basal intracellular Ca2+ concentration ([Ca2+]i) and SOCE through activating TRPC6 on human pulmonary vein smooth muscle cells (hPVSMC). Then, we investigated the effects of overexpression and downregulation of the TG2 gene on the activity of SERCA2, s-SERCA2, basal [Ca2+]i, and SOCE under normoxia and hypoxia in vitro, and investigated the activity of SERCA2 and s-SERCA2 in vivo, respectively. We confirmed that SERCA2 serotonylation inhibited the activity of SERCA2 and increased the Ca2+ influx, and that hypoxia induced TG2-mediated SERCA2 serotonylation both in vivo and in vitro. Furthermore, we investigated the effect of TG2 activity on the biological behavior of hPVSMC by using an inhibitor and agonist of SERCA2, respectively. Finally, we confirmed that chronic hypoxia cannot increase vessel wall thickness, the right ventricular systolic pressure (RVSP), and right ventricular hypertrophy index (RVHI) of vascular smooth muscle-specific Tgm2−/− mice. These results indicated that hypoxia promoted TG2-mediated SERCA2 serotonylation, thereby leading to inhibition of SERCA2 activity, which further increased the calcium influx through the TRPC6 channel. Furthermore, tissue-specific conditional TG2 knockout mice prevents the development of pulmonary hypertension caused by hypoxia. In summary, we uncovered a new target (TG2) for treatment of chronic hypoxic pulmonary hypertension (CHPH).
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Affiliation(s)
- Bo Liu
- Department of Cardiology, Zhongda Hospital, Southeast University, Nanjing, China
| | - Dong Wang
- Department of Cardiology, Zhongda Hospital, Southeast University, Nanjing, China
| | - Erfei Luo
- Department of Cardiology, Zhongda Hospital, Southeast University, Nanjing, China
| | - Jiantong Hou
- Department of Cardiology, Zhongda Hospital, Southeast University, Nanjing, China
| | - Yong Qiao
- Department of Cardiology, Zhongda Hospital, Southeast University, Nanjing, China
| | - Gaoliang Yan
- Department of Cardiology, Zhongda Hospital, Southeast University, Nanjing, China
| | - Qingjie Wang
- Department of Cardiology, Changzhou No. 2 People's Hospital, Nanjing Medical University, Changzhou, China
| | - Chengchun Tang
- Department of Cardiology, Zhongda Hospital, Southeast University, Nanjing, China
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13
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Free d-aspartate triggers NMDA receptor-dependent cell death in primary cortical neurons and perturbs JNK activation, Tau phosphorylation, and protein SUMOylation in the cerebral cortex of mice lacking d-aspartate oxidase activity. Exp Neurol 2019; 317:51-65. [PMID: 30822420 DOI: 10.1016/j.expneurol.2019.02.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 02/19/2019] [Accepted: 02/24/2019] [Indexed: 11/23/2022]
Abstract
In mammals, free d-aspartate (D-Asp) is abundant in the embryonic brain, while levels remain very low during adulthood as a result of the postnatal expression and activity of the catabolizing enzyme d-aspartate oxidase (DDO). Previous studies have shown that long-lasting exposure to nonphysiological, higher D-Asp concentrations in Ddo knockout (Ddo-/-) mice elicits a precocious decay of synaptic plasticity and cognitive functions, along with a dramatic age-dependent expression of active caspase 3, associated with increased cell death in different brain regions, including hippocampus, prefrontal cortex, and substantia nigra pars compacta. Here, we investigate the yet unclear molecular and cellular events associated with the exposure of abnormally high D-Asp concentrations in cortical primary neurons and in the brain of Ddo-/- mice. For the first time, our in vitro findings document that D-Asp induces in a time-, dose-, and NMDA receptor-dependent manner alterations in JNK and Tau phosphorylation levels, associated with pronounced cell death in primary cortical neurons. Moreover, observations obtained in Ddo-/- animals confirmed that high in vivo levels of D-Asp altered cortical JNK signaling, Tau phosphorylation and enhanced protein SUMOylation, indicating a robust indirect role of DDO activity in regulating these biochemical NMDA receptor-related processes. Finally, no gross modifications in D-Asp concentrations and DDO mRNA expression were detected in the cortex of patients with Alzheimer's disease when compared to age-matched healthy controls.
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14
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Kurtishi A, Rosen B, Patil KS, Alves GW, Møller SG. Cellular Proteostasis in Neurodegeneration. Mol Neurobiol 2018; 56:3676-3689. [PMID: 30182337 DOI: 10.1007/s12035-018-1334-z] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 08/27/2018] [Indexed: 02/06/2023]
Abstract
The term proteostasis reflects the fine-tuned balance of cellular protein levels, mediated through a vast network of biochemical pathways. This requires the regulated control of protein folding, post-translational modification, and protein degradation. Due to the complex interactions and intersection of proteostasis pathways, exposure to stress conditions may lead to a disruption of the entire network. Incorrect protein folding and/or modifications during protein synthesis results in inactive or toxic proteins, which may overload degradation mechanisms. Further, a disruption of autophagy and the endoplasmic reticulum degradation pathway may result in additional cellular stress which could ultimately lead to cell death. Neurodegenerative diseases such as Parkinson's disease, Alzheimer's disease, Huntington's disease, and Amyotrophic Lateral Sclerosis all share common risk factors such as oxidative stress, aging, environmental stress, and protein dysfunction; all of which alter cellular proteostasis. The differing pathologies observed in neurodegenerative diseases are determined by factors such as location-specific neuronal death, source of protein dysfunction, and the cell's ability to counter proteotoxicity. In this review, we discuss how the disruption in cellular proteostasis contributes to the onset and progression of neurodegenerative diseases.
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Affiliation(s)
- Alberim Kurtishi
- Department of Biological Sciences, St. John's University, 8000 Utopia Parkway, New York, 11439, USA
| | - Benjamin Rosen
- Department of Biological Sciences, St. John's University, 8000 Utopia Parkway, New York, 11439, USA
| | - Ketan S Patil
- Department of Biological Sciences, St. John's University, 8000 Utopia Parkway, New York, 11439, USA
| | - Guido W Alves
- Norwegian Center for Movement Disorders, Stavanger University Hospital, Stavanger, Norway
| | - Simon G Møller
- Department of Biological Sciences, St. John's University, 8000 Utopia Parkway, New York, 11439, USA. .,Norwegian Center for Movement Disorders, Stavanger University Hospital, Stavanger, Norway.
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15
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Chen L, Liu M, Luan Y, Liu Y, Zhang Z, Ma B, Liu X, Liu Y. BMP‑6 protects retinal pigment epithelial cells from oxidative stress‑induced injury by inhibiting the MAPK signaling pathways. Int J Mol Med 2018; 42:1096-1105. [PMID: 29767257 DOI: 10.3892/ijmm.2018.3675] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 05/10/2018] [Indexed: 11/06/2022] Open
Abstract
Worldwide, neovascular age‑related macular degeneration (nAMD) is one of the most common causes of blindness in the elderly. In particular, degeneration of retinal pigment epithelial (RPE) cells represents the main pathological process in the development of nAMD, and oxidative stress serves a major role. The present study aimed to investigate the association between bone morphogenetic protein 6 (BMP‑6) and nAMD. BMP‑6 concentration was significantly reduced in patients with wet nAMD compared with in the control group. Furthermore, the present study investigated the protective effects of BMP‑6 on RPE cells following oxidative stress‑induced injury. Cell Counting Kit‑8 assay and terminal deoxynucleotidyl transferase dUTP nick‑end labeling staining demonstrated that BMP‑6 increased RPE cell viability, which was decreased following treatment with hydrogen peroxide (H2O2), and reduced H2O2‑induced apoptosis. In addition, western blotting revealed that BMP‑6 reversed the decrease in pro‑caspase‑3 levels and the dysregulation of the B‑cell lymphoma 2 (Bcl‑2)/Bcl‑2‑associated X protein (Bax) balance caused by H2O2. In addition, alterations in c‑Jun N‑terminal protein kinase (JNK) and p38 mitogen‑activated protein kinase (MAPK) expression were examined, and pretreatment with BMP‑6 was demonstrated to reduce H2O2‑induced activation of JNK and p38 MAPK. Conversely, the effects of BMP‑6 were attenuated by its inhibitor noggin. In conclusion, the present study demonstrated that BMP‑6 may protect RPE cells from oxidative stress injury to a certain extent, which may be associated with alterations in the MAPK signaling pathway. However, the specific mechanism of action underlying this effect requires further investigation. Overall, the present study laid a foundation for exploring novel nAMD treatment methods.
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Affiliation(s)
- Li Chen
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Ming Liu
- Department of Ophthalmology, The First Hospital of Xi'an, Xi'an, Shaanxi 710002, P.R. China
| | - Yan Luan
- Institute of Neurobiology, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Yingfei Liu
- Institute of Neurobiology, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Zhichao Zhang
- Institute of Neurobiology, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
| | - Bo Ma
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xuan Liu
- Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Yong Liu
- Institute of Neurobiology, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China
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16
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Maruyama T, Wada H, Abe Y, Niikura T. Alteration of global protein SUMOylation in neurons and astrocytes in response to Alzheimer's disease-associated insults. Biochem Biophys Res Commun 2018; 500:470-475. [PMID: 29660340 DOI: 10.1016/j.bbrc.2018.04.104] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 04/13/2018] [Indexed: 12/20/2022]
Abstract
SUMOylation, a post-translational modification of lysine residues by small ubiquitin-like modifier (SUMO) proteins, has been implicated in the pathogenesis of neurodegenerative disorders including Alzheimer's disease (AD), and in neuron- and astrocyte-specific physiological functions. Global SUMOylation is increased in the AD mouse brain in the pre-plaque-forming stage but returns to wild-type levels in the plaque-bearing stage. To clarify the reason for the transient change in SUMOylation, we analyzed the alteration of global SUMOylation induced by AD-associated cytotoxic stimuli in neurons and astrocytes individually. In neurons, amyloid β42 oligomers induced some but not significant increase in levels of SUMO1-modified proteins. Both hydrogen peroxide and glutamate significantly reduced SUMO1-modified protein levels. These changes were more prominent in neurons than in astrocytes. The opposite effect of Aβ and oxidative/excitotoxic stimuli on SUMO1 modification may cause the pathological stage-associated change in the level of SUMO-modified proteins in the AD mouse brain.
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Affiliation(s)
- Takuma Maruyama
- Department of Information and Communication Sciences, Faculty of Science and Technology, Sophia University, Japan
| | - Harmony Wada
- Department of Information and Communication Sciences, Faculty of Science and Technology, Sophia University, Japan
| | - Yoichiro Abe
- Department of Pharmacology, Keio University School of Medicine, Japan
| | - Takako Niikura
- Department of Information and Communication Sciences, Faculty of Science and Technology, Sophia University, Japan.
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17
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An overview of the possible therapeutic role of SUMOylation in the treatment of Alzheimer’s disease. Pharmacol Res 2018; 130:420-437. [DOI: 10.1016/j.phrs.2017.12.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 12/13/2017] [Accepted: 12/21/2017] [Indexed: 02/07/2023]
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18
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MacDonald PE. A post-translational balancing act: the good and the bad of SUMOylation in pancreatic islets. Diabetologia 2018; 61:775-779. [PMID: 29330559 DOI: 10.1007/s00125-017-4543-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 12/20/2017] [Indexed: 12/18/2022]
Abstract
Post-translational modification of proteins contributes to the control of cell function and survival. The balance of these in insulin-producing pancreatic beta cells is important for the maintenance of glucose homeostasis. Protection from the damaging effects of reactive oxygen species is required for beta cell survival, but if this happens at the expense of insulin secretory function then the ability of islets to respond to changing metabolic conditions may be compromised. In this issue of Diabetologia, He et al ( https://doi.org/10.1007/s00125-017-4523-9 ) show that post-translational attachment of small ubiquitin-like modifier (SUMO) to target lysine residues (SUMOylation) strikes an important balance between the protection of beta cells from oxidative stress and the maintenance of insulin secretory function. They show that SUMOylation is required to stabilise nuclear factor erythroid 2-related factor 2 (NRF2) and increase antioxidant gene expression. Decreasing SUMOylation in beta cells impairs their antioxidant capacity, causes cell death, hyperglycaemia, and increased sensitivity to streptozotocin-induced diabetes, while increasing SUMOylation is protective. However, this protection from overt diabetes occurs in concert with glucose intolerance due to impaired beta cell function. A possible role for SUMOylation as a key factor balancing beta cell protection vs beta cell responsiveness to metabolic cues is discussed in this Commentary.
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Affiliation(s)
- Patrick E MacDonald
- Department of Pharmacology, University of Alberta, Edmonton, AB, Canada.
- Alberta Diabetes Institute, LKS Centre, Rm. 6-126, University of Alberta, Edmonton, AB, T6G 2E1, Canada.
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Ficulle E, Sufian MDS, Tinelli C, Corbo M, Feligioni M. Aging-related SUMOylation pattern in the cortex and blood plasma of wild type mice. Neurosci Lett 2018; 668:48-54. [PMID: 29325714 DOI: 10.1016/j.neulet.2018.01.004] [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: 11/23/2017] [Revised: 12/20/2017] [Accepted: 01/02/2018] [Indexed: 12/19/2022]
Abstract
Protein activities and mechanisms related to aging has become a growing interest nowadays. Since SUMOylation is implicated in several cellular processes, its investigation related to senescence, aging and frailty is of high interest. In our study, wild type mice cortical lysates, synaptosomes and plasma have been processed to evaluate SUMOylation and SUMO machinery expression (Ubc9 and SENP1 enzymes) profile at different ages. In cortical lysates, SUMO-1ylation reached a peak at 6 months followed by a decrease; while in synaptosomes, it progressively increased till 18 months. Regarding SUMO-2/3ylation, it was observed a similar trend in both lysate and synaptosomes where the protein conjugation was the highest at 6 months but interestingly decreased afterwards. In addition, Ubc9 and SENP1 enzymes showed a linear increased expression level in both brain preparations. Since SUMOylation process is ubiquitously expressed, we were interested to identify SUMO conjugation at peripheral level too. Thus, SUMO-1ylation and SUMO-2/3ylation expression level has been detected in mouse plasma that revealed an inverted U-shaped curve trend during mice lifespan. Surprisingly, SENP1 enzyme was not present in the plasma while Ubc9 enzyme reached a plateau at 6 months and was highly expressed till 18 months. In conclusion, our data indicates that SUMOylation is highly correlated with age-related processes which indisputably need to be considered for further investigation.
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Affiliation(s)
- E Ficulle
- Laboratory of Neurobiology in Translational Medicine, Department of Neurorehabilitation Sciences, Casa Cura Policlinico, Milan, Italy
| | - M D Shah Sufian
- Laboratory of Neurobiology in Translational Medicine, Department of Neurorehabilitation Sciences, Casa Cura Policlinico, Milan, Italy
| | - C Tinelli
- Laboratory of Neuronal Cell Signaling, EBRI Rita Levi-Montalcini Foundation, Rome, Italy
| | - M Corbo
- Laboratory of Neurobiology in Translational Medicine, Department of Neurorehabilitation Sciences, Casa Cura Policlinico, Milan, Italy
| | - M Feligioni
- Laboratory of Neurobiology in Translational Medicine, Department of Neurorehabilitation Sciences, Casa Cura Policlinico, Milan, Italy; Laboratory of Neuronal Cell Signaling, EBRI Rita Levi-Montalcini Foundation, Rome, Italy.
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20
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Wang Z, Zhu WG, Xu X. Ubiquitin-like modifications in the DNA damage response. Mutat Res 2017; 803-805:56-75. [PMID: 28734548 DOI: 10.1016/j.mrfmmm.2017.07.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/03/2017] [Accepted: 07/03/2017] [Indexed: 12/14/2022]
Abstract
Genomic DNA is damaged at an extremely high frequency by both endogenous and environmental factors. An improper response to DNA damage can lead to genome instability, accelerate the aging process and ultimately cause various human diseases, including cancers and neurodegenerative disorders. The mechanisms that underlie the cellular DNA damage response (DDR) are complex and are regulated at many levels, including at the level of post-translational modification (PTM). Since the discovery of ubiquitin in 1975 and ubiquitylation as a form of PTM in the early 1980s, a number of ubiquitin-like modifiers (UBLs) have been identified, including small ubiquitin-like modifiers (SUMOs), neural precursor cell expressed, developmentally down-regulated 8 (NEDD8), interferon-stimulated gene 15 (ISG15), human leukocyte antigen (HLA)-F adjacent transcript 10 (FAT10), ubiquitin-fold modifier 1 (UFRM1), URM1 ubiquitin-related modifier-1 (URM1), autophagy-related protein 12 (ATG12), autophagy-related protein 8 (ATG8), fan ubiquitin-like protein 1 (FUB1) and histone mono-ubiquitylation 1 (HUB1). All of these modifiers have known roles in the cellular response to various forms of stress, and delineating their underlying molecular mechanisms and functions is fundamental in enhancing our understanding of human disease and longevity. To date, however, the molecular mechanisms and functions of these UBLs in the DDR remain largely unknown. This review summarizes the current status of PTMs by UBLs in the DDR and their implication in cancer diagnosis, therapy and drug discovery.
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Affiliation(s)
- Zhifeng Wang
- Guangdong Key Laboratory of Genome Stability & Disease Prevention, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, China
| | - Wei-Guo Zhu
- Guangdong Key Laboratory of Genome Stability & Disease Prevention, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, China
| | - Xingzhi Xu
- Guangdong Key Laboratory of Genome Stability & Disease Prevention, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, China; Beijing Key Laboratory of DNA Damage Response, Capital Normal University College of Life Sciences, Beijing 100048, China.
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Targeting SUMO-1ylation Contrasts Synaptic Dysfunction in a Mouse Model of Alzheimer's Disease. Mol Neurobiol 2016; 54:6609-6623. [PMID: 27738871 DOI: 10.1007/s12035-016-0176-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 09/28/2016] [Indexed: 12/13/2022]
Abstract
Synaptic dysfunction has been recognized as an early feature occurring at the onset of Alzheimer's disease (AD). Compromised neurotransmission leads over time to synaptic loss and these events correlate with the cognitive decline that progressively affects AD patients.Protein SUMOylation (Small Ubiquitin-like MOdifier) is a post-translational modification (PTM) involved in several cellular processes including synaptic transmission.We here demonstrate that cortical synaptosomes prepared from Tg2576 mice of 6 months of age show an increased SUMO-1ylation, which returns back to normal levels at 20 months although synaptic SUMOylation, at this age, resulted more sensible to KCl stimulus. Our previous findings have shown that increased SUMOylation at presynaptic level reduces the KCl-induced glutamate release. Accordingly, Tg2576 mice of 6 and 20 months show a reduced KCl-evoked neurotransmitter (NT) release. In order to target SUMOylation, we developed two cell penetrating HIV Tat-linked peptides, namely TU-1 and TS-1. This strategy allowed us to modulate the SUMO machinery either positively (TU-1) or negatively (TS-1). As expected, Tg2576 synaptosomes treated with TU-1 exhibited a reduced NT release evoked by KCl. On the contrary, TS-1 treatment, which decreased SUMOylation, was able to normalize impaired glutamate release. Notably, an analysis of autopsy human AD brains has shown an increased SUMOylation in both cortical tissue and synaptosomal lysate. Our data indicate that SUMOylation level changes contribute to the development of synaptic alterations typically occurring at the AD onset and that SUMOylation could be a pharmacological target in AD synaptic dysfunction.
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22
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Nie X, Yu S, Qiu M, Wang X, Wang Y, Bai Y, Zhang F, Wang S. Aspergillus flavus SUMO Contributes to Fungal Virulence and Toxin Attributes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:6772-6782. [PMID: 27532332 DOI: 10.1021/acs.jafc.6b02199] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Small ubiquitin-like modifiers (SUMOs) can be reversibly attached to target proteins in a process known as SUMOylation, and this process influences several important eukaryotic cell events. However, little is known regarding SUMO or SUMOylation in Aspergillus flavus. Here, we identified a novel member of the SUMO family in A. flavus, AfSumO, and validated the existence of SUMOylation in this pathogenic filamentous fungus. We investigated the roles of AfsumO in A. flavus by determining the effects of AfsumO mutations on the growth phenotype, stress response, conidia and sclerotia production, aflatoxin biosynthesis, and pathogenicity to seeds, and we found that SUMOylation plays a role in fungal virulence and toxin attributes. Taken together, these results not only reveal potential mechanisms of fungal virulence and toxin attributes in A. flavus but also provide a novel approach for promising new control strategies of this fungal pathogen.
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Affiliation(s)
- Xinyi Nie
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, School of Life Sciences, Fujian Agriculture and Forestry University , Fuzhou 350002, China
| | - Song Yu
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, School of Life Sciences, Fujian Agriculture and Forestry University , Fuzhou 350002, China
| | - Mengguang Qiu
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, School of Life Sciences, Fujian Agriculture and Forestry University , Fuzhou 350002, China
| | - Xiuna Wang
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, School of Life Sciences, Fujian Agriculture and Forestry University , Fuzhou 350002, China
| | - Yu Wang
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, School of Life Sciences, Fujian Agriculture and Forestry University , Fuzhou 350002, China
| | - Youhuang Bai
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, School of Life Sciences, Fujian Agriculture and Forestry University , Fuzhou 350002, China
| | - Feng Zhang
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, School of Life Sciences, Fujian Agriculture and Forestry University , Fuzhou 350002, China
| | - Shihua Wang
- Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, School of Life Sciences, Fujian Agriculture and Forestry University , Fuzhou 350002, China
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23
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Abstract
SUMOylation is a ubiquitin-related transient posttranslational modification pathway catalyzing the conjugation of small ubiquitin-like modifier (SUMO) proteins (SUMO1, SUMO2, and SUMO3) to lysine residues of proteins. SUMOylation targets a wide variety of cellular regulators and thereby affects a multitude of different cellular processes. SUMO/sentrin-specific proteases are able to remove SUMOs from targets, contributing to a tight control of SUMOylated proteins. Genetic and cell biological experiments indicate a critical role of balanced SUMOylation/deSUMOylation for proper cardiac development, metabolism, and stress adaptation. Here, we review the current knowledge about SUMOylation/deSUMOylation in the heart and provide an integrated picture of cardiac functions of the SUMO system under physiologic or pathologic conditions. We also describe potential therapeutic approaches targeting the SUMO machinery to combat heart disease.
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Affiliation(s)
- Luca Mendler
- From the Institute of Biochemistry II, Goethe University, Medical School, Frankfurt, Germany (L.M., S.M.); Institute of Biochemistry, Faculty of General Medicine, University of Szeged, Szeged, Hungary (L.M.); and Department I - Cardiac Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (T.B.)
| | - Thomas Braun
- From the Institute of Biochemistry II, Goethe University, Medical School, Frankfurt, Germany (L.M., S.M.); Institute of Biochemistry, Faculty of General Medicine, University of Szeged, Szeged, Hungary (L.M.); and Department I - Cardiac Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (T.B.).
| | - Stefan Müller
- From the Institute of Biochemistry II, Goethe University, Medical School, Frankfurt, Germany (L.M., S.M.); Institute of Biochemistry, Faculty of General Medicine, University of Szeged, Szeged, Hungary (L.M.); and Department I - Cardiac Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (T.B.).
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24
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Zheng H, Wu J, Jin Z, Yan LJ. Protein Modifications as Manifestations of Hyperglycemic Glucotoxicity in Diabetes and Its Complications. BIOCHEMISTRY INSIGHTS 2016; 9:1-9. [PMID: 27042090 PMCID: PMC4807886 DOI: 10.4137/bci.s36141] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 02/25/2016] [Accepted: 02/27/2016] [Indexed: 02/07/2023]
Abstract
Diabetes and its complications are hyperglycemic toxicity diseases. Many metabolic pathways in this array of diseases become aberrant, which is accompanied with a variety of posttranslational protein modifications that in turn reflect diabetic glucotoxicity. In this review, we summarize some of the most widely studied protein modifications in diabetes and its complications. These modifications include glycation, carbonylation, nitration, cysteine S-nitrosylation, acetylation, sumoylation, ADP-ribosylation, O-GlcNAcylation, and succination. All these posttranslational modifications can be significantly attributed to oxidative stress and/or carbon stress induced by diabetic redox imbalance that is driven by activation of pathways, such as the polyol pathway and the ADP-ribosylation pathway. Exploring the nature of these modifications should facilitate our understanding of the pathological mechanisms of diabetes and its associated complications.
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Affiliation(s)
- Hong Zheng
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, UNT Health Science Center, Fort Worth, TX, USA.; Department of Basic Theory of Traditional Chinese Medicine, College of Basic Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
| | - Jinzi Wu
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, UNT Health Science Center, Fort Worth, TX, USA
| | - Zhen Jin
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, UNT Health Science Center, Fort Worth, TX, USA
| | - Liang-Jun Yan
- Department of Pharmaceutical Sciences, UNT System College of Pharmacy, UNT Health Science Center, Fort Worth, TX, USA
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25
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Masoumi KC, Massoumi R. CYLD and SUMO in neuroblastoma therapy. Oncoscience 2016; 3:3-4. [PMID: 26973854 PMCID: PMC4751910 DOI: 10.18632/oncoscience.287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 01/22/2016] [Indexed: 02/06/2023] Open
Affiliation(s)
- Katarzyna Chmielarska Masoumi
- Department of Laboratory Medicine, Translational Cancer Research, Division of Molecular Tumour Pathology, Lund University, Sweden
| | - Ramin Massoumi
- Department of Laboratory Medicine, Translational Cancer Research, Division of Molecular Tumour Pathology, Lund University, Sweden
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26
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Okamura T, Antoun G, Keir ST, Friedman H, Bigner DD, Ali-Osman F. Phosphorylation of Glutathione S-Transferase P1 (GSTP1) by Epidermal Growth Factor Receptor (EGFR) Promotes Formation of the GSTP1-c-Jun N-terminal kinase (JNK) Complex and Suppresses JNK Downstream Signaling and Apoptosis in Brain Tumor Cells. J Biol Chem 2015; 290:30866-78. [PMID: 26429914 DOI: 10.1074/jbc.m115.656140] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Indexed: 11/06/2022] Open
Abstract
Under normal physiologic conditions, the glutathione S-transferase P1 (GSTP1) protein exists intracellularly as a dimer in reversible equilibrium with its monomeric subunits. In the latter form, GSTP1 binds to the mitogen-activated protein kinase, JNK, and inhibits JNK downstream signaling. In tumor cells, which frequently are characterized by constitutively high GSTP1 expression, GSTP1 undergoes phosphorylation by epidermal growth factor receptor (EGFR) at tyrosine residues 3, 7, and 198. Here we report on the effect of this EGFR-dependent GSTP1 tyrosine phosphorylation on the interaction of GSTP1 with JNK, on the regulation of JNK downstream signaling by GSTP1, and on tumor cell survival. Using in vitro and in vivo growing human brain tumors, we show that tyrosine phosphorylation shifts the GSTP1 dimer-monomer equilibrium to the monomeric state and facilitates the formation of the GSTP1-JNK complex, in which JNK is functionally inhibited. Targeted mutagenesis and functional analysis demonstrated that the increased GSTP1 binding to JNK results from phosphorylation of the GSTP1 C-terminal Tyr-198 by EGFR and is associated with a >2.5-fold decrease in JNK downstream signaling and a significant suppression of both spontaneous and drug-induced apoptosis in the tumor cells. The findings define a novel mechanism of regulatory control of JNK signaling that is mediated by the EGFR/GSTP1 cross-talk and provides a survival advantage for tumors with activated EGFR and high GSTP1 expression. The results lay the foundation for a novel strategy of dual EGFR/GSTP1 for treating EGFR+ve, GSTP1 expressing GBMs.
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Affiliation(s)
| | | | - Stephen T Keir
- From the Departments of Neurosurgery and the Preston Robert Tisch Brain Tumor Center
| | - Henry Friedman
- From the Departments of Neurosurgery and the Preston Robert Tisch Brain Tumor Center, Duke Cancer Institute and Duke University School of Medicine, Durham, North Carolina 27710
| | - Darell D Bigner
- From the Departments of Neurosurgery and the Preston Robert Tisch Brain Tumor Center, Duke Cancer Institute and Duke University School of Medicine, Durham, North Carolina 27710 Pathology and
| | - Francis Ali-Osman
- From the Departments of Neurosurgery and the Preston Robert Tisch Brain Tumor Center, Duke Cancer Institute and Duke University School of Medicine, Durham, North Carolina 27710 Pathology and
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27
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Zhang Z, Ma W, Wang L, Gong H, Tian Y, Zhang J, Liu J, Lu H, Chen X, Liu Y. Activation of Type 4 Metabotropic Glutamate Receptor Attenuates Oxidative Stress-Induced Death of Neural Stem Cells with Inhibition of JNK and p38 MAPK Signaling. Stem Cells Dev 2015; 24:2709-22. [PMID: 26176363 DOI: 10.1089/scd.2015.0067] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Promoting both endogenous and exogenous neural stem cells' (NSCs) survival in the hostile host environments is essential to cell replacement therapy for central nervous system (CNS) disorders. Type 4 metabotropic glutamate receptor (mGluR4), one of the members of mGluRs, has been shown to protect neurons from acute and chronic excitotoxic insults in various brain damages. The present study investigated the preventive effects of mGluR4 on NSC injury induced by oxidative stress. Under challenge with H2O2, loss of cell viability was observed in cultured rat NSCs, and treatment with selective mGluR4 agonist VU0155041 conferred protective effects against the loss of cellular viability in a concentration-dependent manner, as shown by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay. Pretreatment of VU0155041 (30 μM) also inhibited the excessive NSC death induced by H2O2, and group III mGluRs antagonist (RS)-a-methylserine-O-phosphate (MSOP) or gene-targeted knockdown abolished the protective action of mGluR4, indicated by propidium iodide-Hoechst and terminal deoxynucleotidyl transferase-mediated UTP nick end labeling (TUNEL) staining. Western blot assay demonstrated that mGluR4 activation reversed the decreased procaspase-8/9/3and the destructed Bcl-2/Bax expressing balance, and likewise, MSOP and mGluR4 knockdown abrogated the action of mGluR4 activity. Furthermore, inhibition of JNK and p38 mitogen-activated protein kinases (MAPKs) were observed after mGluR4 activation, and as paralleling control, JNK-specific inhibitor SP600125 and p38-specific inhibitor SB203580 significantly rescued the H2O2-mediated NSC apoptosis and cleavage of procaspase-3. We suggest that activation of mGluR4 prevents oxidative stress-induced NSC death and apoptotic-associated protein activities with involvement of inhibiting the JNK and p38 pathways in cell culture. Our findings may help to develop strategies for enhancing the resided and transplanted NSC survival after oxidative stress insult of CNS.
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Affiliation(s)
- Zhichao Zhang
- 1 Institute of Neurobiology, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi, China
| | - Wen Ma
- 1 Institute of Neurobiology, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi, China
| | - Li Wang
- 2 Department of Obstetrics and Gynecology, The Affiliated Hospital of Xi'an Medical College , Xi'an, Shaanxi, China
| | - Hanshi Gong
- 1 Institute of Neurobiology, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi, China
| | - Yumei Tian
- 3 Xi'an Mental Health Center , Xi'an, Shaanxi, China
| | - Jianshui Zhang
- 1 Institute of Neurobiology, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi, China
| | - Jianxin Liu
- 1 Institute of Neurobiology, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi, China
| | - Haixia Lu
- 1 Institute of Neurobiology, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi, China
| | - Xinlin Chen
- 1 Institute of Neurobiology, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi, China
| | - Yong Liu
- 1 Institute of Neurobiology, Xi'an Jiaotong University Health Science Center , Xi'an, Shaanxi, China
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28
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Martins WC, Tasca CI, Cimarosti H. Battling Alzheimer's Disease: Targeting SUMOylation-Mediated Pathways. Neurochem Res 2015; 41:568-78. [PMID: 26227998 DOI: 10.1007/s11064-015-1681-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Revised: 06/29/2015] [Accepted: 07/22/2015] [Indexed: 01/10/2023]
Abstract
SUMO (small ubiquitin-like modifier) conjugation is a critically important control process in all eukaryotic cells, because it acts as a biochemical switch and regulates the function of hundreds of proteins in many different pathways. Although the diverse functional consequences and molecular targets of SUMOylation remain largely unknown, SUMOylation is becoming increasingly implicated in the pathophysiology of Alzheimer's disease (AD). Apart from the central SUMO-modified disease-associated proteins, such as amyloid precursor protein, amyloid β, and tau, SUMOylation also regulates several other processes underlying AD. These are involved in inflammation, mitochondrial dynamics, synaptic transmission and plasticity, as well as in protective responses to cell stress. Herein, we review current reports on the involvement of SUMOylation in AD, and present an overview of potential SUMO targets and pathways underlying AD pathogenesis.
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Affiliation(s)
- Wagner Carbolin Martins
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, 88040-900, Brazil
| | - Carla Inês Tasca
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, 88040-900, Brazil
| | - Helena Cimarosti
- Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, 88040-900, Brazil.
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29
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The expression of Ubc9 and the intensity of SERCA2a-SUMOylation were reduced in diet-induced obese rats and partially restored by trimetazidine. J Cardiovasc Pharmacol 2015; 65:47-53. [PMID: 25329748 DOI: 10.1097/fjc.0000000000000162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Reduced expression of sarcoplasmic reticulum calcium-transporting ATPase isoform 2a (SERCA2a) has been shown to play a significant role in the cardiac dysfunction of obese animal models. It was reported recently that SUMOylation enhances the stability and activity of SERCA2a. We hypothesized that SERCA2a-SUMOylation might be involved in obesity-mediated reduction of SERCA2a. METHOD AND RESULTS Trimetazidine (TMZ), the drug that inhibits fatty acid oxidation, was used in diet-induced obese (DIO) rats and palmitic acid (PA)-treated cardiomyocytes. The intensity of SERCA2a-SUMOylation and proteins involved in SERCA2a-SUMOylation were investigated in vivo and in vitro. DIO rats presented cardiac dysfunction, which was alleviated by TMZ treatment. Reductions of SERCA2a protein and the intensity of SERCA2a-SUMOylation were observed in DIO rats and PA-treated cardiomyocytes. These reductions were partially restored by TMZ. However, TMZ itself did not alter the intensity of SERCA2a-SUMOylation in control cardiomyocytes. The variations of protein and messenger RNA levels of Ubiquitin carrier protein 9 are in accordance with the intensity of SERCA2a-SUMOylation. Whereas the other proteins involved in SERCA2a-SUMOylation were not changed by DIO and PA. CONCLUSIONS TMZ alleviates the DIO- and PA-induced reductions of SERCA2a-SUMOylation. Ubiquitin carrier protein 9 is involved in the reductions.
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30
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Mancini M, Leo E, Takemaru KI, Campi V, Castagnetti F, Soverini S, De Benedittis C, Rosti G, Cavo M, Santucci MA, Martinelli G. 14-3-3 Binding and Sumoylation Concur to the Down-Modulation of β-catenin Antagonist chibby 1 in Chronic Myeloid Leukemia. PLoS One 2015; 10:e0131074. [PMID: 26147002 PMCID: PMC4492953 DOI: 10.1371/journal.pone.0131074] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Accepted: 05/28/2015] [Indexed: 11/18/2022] Open
Abstract
The down-modulation of the β-catenin antagonist Chibby 1 (CBY1) associated with the BCR-ABL1 fusion gene of chronic myeloid leukemia (CML) contributes to the aberrant activation of β-catenin, particularly in leukemic stem cells (LSC) resistant to tyrosine kinase (TK) inhibitors. It is, at least partly, driven by transcriptional events and gene promoter hyper-methylation. Here we demonstrate that it also arises from reduced protein stability upon binding to 14-3-3σ adapter protein. CBY1/14-3-3σ interaction in BCR-ABL1+ cells is mediated by the fusion protein TK and AKT phosphorylation of CBY1 at critical serine 20, and encompasses the 14-3-3σ binding modes I and II involved in the binding with client proteins. Moreover, it is impaired by c-Jun N-terminal kinase (JNK) phosphorylation of 14-3-3σ at serine 186, which promotes dissociation of client proteins. The ubiquitin proteasome system UPS participates in reducing stability of CBY1 bound with 14-3-3σ through enhanced SUMOylation. Our results open new routes towards the research on molecular pathways promoting the proliferative advantage of leukemic hematopoiesis over the normal counterpart.
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MESH Headings
- 14-3-3 Proteins/metabolism
- Amino Acid Motifs
- Benzamides/pharmacology
- Biomarkers, Tumor/metabolism
- Carrier Proteins/biosynthesis
- Carrier Proteins/genetics
- Down-Regulation
- Exoribonucleases/metabolism
- Fusion Proteins, bcr-abl/metabolism
- Gene Expression Regulation, Leukemic/genetics
- Humans
- JNK Mitogen-Activated Protein Kinases/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Neoplasm Proteins/antagonists & inhibitors
- Neoplasm Proteins/genetics
- Neoplasm Proteins/metabolism
- Nuclear Proteins/biosynthesis
- Nuclear Proteins/genetics
- Oncogene Protein p65(gag-jun)
- Phosphorylation
- Proteasome Endopeptidase Complex/metabolism
- Protein Binding
- Protein Interaction Mapping
- Protein Processing, Post-Translational
- Protein Stability
- Proto-Oncogene Proteins c-akt/metabolism
- Pyrazoles/pharmacology
- Subcellular Fractions/metabolism
- Sumoylation
- beta Catenin/antagonists & inhibitors
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Affiliation(s)
- Manuela Mancini
- Department of Experimental Diagnostic and Specialty Medicine—DIMES—Institute of Hematology "L. and A. Seràgnoli". University of Bologna-Medical School, Bologna, Italy
- * E-mail:
| | - Elisa Leo
- Department of Experimental Diagnostic and Specialty Medicine—DIMES—Institute of Hematology "L. and A. Seràgnoli". University of Bologna-Medical School, Bologna, Italy
| | - Ken-Ichi Takemaru
- Department of Pharmacological Sciences, State University of New York at Stony Brook, Stony Brook, New York, United States of America
| | - Virginia Campi
- Department of Experimental Diagnostic and Specialty Medicine—DIMES—Institute of Hematology "L. and A. Seràgnoli". University of Bologna-Medical School, Bologna, Italy
| | - Fausto Castagnetti
- Department of Experimental Diagnostic and Specialty Medicine—DIMES—Institute of Hematology "L. and A. Seràgnoli". University of Bologna-Medical School, Bologna, Italy
| | - Simona Soverini
- Department of Experimental Diagnostic and Specialty Medicine—DIMES—Institute of Hematology "L. and A. Seràgnoli". University of Bologna-Medical School, Bologna, Italy
| | - Caterina De Benedittis
- Department of Experimental Diagnostic and Specialty Medicine—DIMES—Institute of Hematology "L. and A. Seràgnoli". University of Bologna-Medical School, Bologna, Italy
| | - Gianantonio Rosti
- Department of Experimental Diagnostic and Specialty Medicine—DIMES—Institute of Hematology "L. and A. Seràgnoli". University of Bologna-Medical School, Bologna, Italy
| | - Michele Cavo
- Department of Experimental Diagnostic and Specialty Medicine—DIMES—Institute of Hematology "L. and A. Seràgnoli". University of Bologna-Medical School, Bologna, Italy
| | - Maria Alessandra Santucci
- Department of Experimental Diagnostic and Specialty Medicine—DIMES—Institute of Hematology "L. and A. Seràgnoli". University of Bologna-Medical School, Bologna, Italy
| | - Giovanni Martinelli
- Department of Experimental Diagnostic and Specialty Medicine—DIMES—Institute of Hematology "L. and A. Seràgnoli". University of Bologna-Medical School, Bologna, Italy
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31
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SUMO1 Affects Synaptic Function, Spine Density and Memory. Sci Rep 2015; 5:10730. [PMID: 26022678 PMCID: PMC4650663 DOI: 10.1038/srep10730] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 04/17/2015] [Indexed: 01/19/2023] Open
Abstract
Small ubiquitin-like modifier-1 (SUMO1) plays a number of roles in cellular events and recent evidence has given momentum for its contributions to neuronal development and function. Here, we have generated a SUMO1 transgenic mouse model with exclusive overexpression in neurons in an effort to identify in vivo conjugation targets and the functional consequences of their SUMOylation. A high-expressing line was examined which displayed elevated levels of mono-SUMO1 and increased high molecular weight conjugates in all brain regions. Immunoprecipitation of SUMOylated proteins from total brain extract and proteomic analysis revealed ~95 candidate proteins from a variety of functional classes, including a number of synaptic and cytoskeletal proteins. SUMO1 modification of synaptotagmin-1 was found to be elevated as compared to non-transgenic mice. This observation was associated with an age-dependent reduction in basal synaptic transmission and impaired presynaptic function as shown by altered paired pulse facilitation, as well as a decrease in spine density. The changes in neuronal function and morphology were also associated with a specific impairment in learning and memory while other behavioral features remained unchanged. These findings point to a significant contribution of SUMO1 modification on neuronal function which may have implications for mechanisms involved in mental retardation and neurodegeneration.
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32
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Kim EY, Zhang Y, Ye B, Segura AM, Beketaev I, Xi Y, Yu W, Chang J, Li F, Wang J. Involvement of activated SUMO-2 conjugation in cardiomyopathy. Biochim Biophys Acta Mol Basis Dis 2015; 1852:1388-99. [PMID: 25857621 DOI: 10.1016/j.bbadis.2015.03.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 03/24/2015] [Accepted: 03/30/2015] [Indexed: 01/14/2023]
Abstract
Sumoylation is a posttranslational modification that regulates a wide spectrum of cellular activities. Cardiomyopathy is the leading cause of heart failure. Whether sumoylation, particularly SUMO-2/3 conjugation, is involved in cardiomyopathy has not been investigated. We report here that SUMO-2/3 conjugation was elevated in the human failing hearts, and we investigated the impact of increased SUMO-2 conjugation on heart function by using the gain-of-function approach in mice, in which cardiac specific expression of constitutively active SUMO-2 was governed by alpha myosin heavy chain promoter (MHC-SUMO-2 transgenic, SUMO-2-Tg). Four of five independent SUMO-2-Tg mouse lines exhibited cardiomyopathy with various severities, ranging from acute heart failure leading to early death to the development of chronic cardiomyopathy with aging. We further revealed that SUMO-2 directly regulated apoptotic process by at least partially targeting calpain 2 and its natural inhibitor calpastatin. SUMO conjugation to calpain 2 promoted its enzymatic activity, and SUMO attachment to calpastatin mainly promoted its turnover and altered its subcellular distribution. Thus, enhanced SUMO-2 conjugation led to increased apoptosis and played a pathogenic role in the development of cardiomyopathy and heart failure.
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Affiliation(s)
- Eun Young Kim
- Center for Stem Cell Engineering, Department of Basic Research Laboratories, Texas Heart Institute at St. Luke's Episcopal Hospital, 6770 Bertner Avenue, MC 2-255, Houston, TX 77030, USA
| | - Yi Zhang
- In Vitro Fertilization Center, Affiliated Hospital of Hainan Medical University, 31 Long-Hua Road, Haikou, Hainan 570102, People's Republic of China
| | - Bo Ye
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, 601 Elmwood Avenue, Box 626, Rochester, NY 14642, USA
| | - Ana Maria Segura
- Department of Cardiac Pathology, Texas Heart Institute at St. Luke's Episcopal Hospital, 6770 Bertner Avenue, MC 2-255, Houston, TX 77030, USA
| | - Ilimbek Beketaev
- Center for Stem Cell Engineering, Department of Basic Research Laboratories, Texas Heart Institute at St. Luke's Episcopal Hospital, 6770 Bertner Avenue, MC 2-255, Houston, TX 77030, USA
| | - Yutao Xi
- Laboratory of Electrophysiology, Department of Basic Research Laboratories, Texas Heart Institute at St. Luke's Episcopal Hospital, 6770 Bertner Avenue, MC 2-255, Houston, TX 77030, USA
| | - Wei Yu
- Department of Biochemistry and Molecular Biology, University of Houston, Houston, TX 77204, USA
| | - Jiang Chang
- Center for Molecular Development and Disease, Institute of Biosciences and Technology, Texas A&M Health Science Center, 2121 W. Holcombe Blvd., Houston, TX 77030, USA
| | - Faqian Li
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, 601 Elmwood Avenue, Box 626, Rochester, NY 14642, USA
| | - Jun Wang
- Center for Stem Cell Engineering, Department of Basic Research Laboratories, Texas Heart Institute at St. Luke's Episcopal Hospital, 6770 Bertner Avenue, MC 2-255, Houston, TX 77030, USA.
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Nisticò R, Florenzano F, Mango D, Ferraina C, Grilli M, Di Prisco S, Nobili A, Saccucci S, D'Amelio M, Morbin M, Marchi M, Mercuri NB, Davis RJ, Pittaluga A, Feligioni M. Presynaptic c-Jun N-terminal Kinase 2 regulates NMDA receptor-dependent glutamate release. Sci Rep 2015; 5:9035. [PMID: 25762148 PMCID: PMC4357012 DOI: 10.1038/srep09035] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 02/13/2015] [Indexed: 12/17/2022] Open
Abstract
Activation of c-Jun N-terminal kinase (JNK) signaling pathway is a critical step for neuronal death occurring in several neurological conditions. JNKs can be activated via receptor tyrosine kinases, cytokine receptors, G-protein coupled receptors and ligand-gated ion channels, including the NMDA glutamate receptors. While JNK has been generally associated with postsynaptic NMDA receptors, its presynaptic role remains largely unexplored. Here, by means of biochemical, morphological and functional approaches, we demonstrate that JNK and its scaffold protein JIP1 are also expressed at the presynaptic level and that the NMDA-evoked glutamate release is controlled by presynaptic JNK-JIP1 interaction. Moreover, using knockout mice for single JNK isoforms, we proved that JNK2 is the essential isoform in mediating this presynaptic event. Overall the present findings unveil a novel JNK2 localization and function, which is likely to play a role in different physiological and pathological conditions.
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Affiliation(s)
- Robert Nisticò
- 1] Laboratory of Pharmacology of Synaptic Plasticity, EBRI "Rita Levi-Montalcini" Foundation, Rome, 00143, Italy [2] Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, 00185, Italy
| | - Fulvio Florenzano
- Laboratory of Pharmacology of Synaptic Plasticity, EBRI "Rita Levi-Montalcini" Foundation, Rome, 00143, Italy
| | - Dalila Mango
- 1] Laboratory of Pharmacology of Synaptic Plasticity, EBRI "Rita Levi-Montalcini" Foundation, Rome, 00143, Italy [2] Laboratory of Experimental Neurology, IRCCS Fondazione Santa Lucia, Rome, 00143, Italy
| | - Caterina Ferraina
- Laboratory of Pharmacology of Synaptic Plasticity, EBRI "Rita Levi-Montalcini" Foundation, Rome, 00143, Italy
| | - Massimo Grilli
- Department of Pharmacy, Pharmacology and Toxicology Section, University of Genoa, Genoa, 16148, Italy
| | - Silvia Di Prisco
- Department of Pharmacy, Pharmacology and Toxicology Section, University of Genoa, Genoa, 16148, Italy
| | - Annalisa Nobili
- 1] Laboratory of Experimental Neurology, IRCCS Fondazione Santa Lucia, Rome, 00143, Italy [2] University Campus Biomedico, 00100 Rome
| | - Stefania Saccucci
- Neuropathology &Neurology V - IRCCS Foundation C. Besta Milan, 20133, Italy
| | - Marcello D'Amelio
- 1] Laboratory of Experimental Neurology, IRCCS Fondazione Santa Lucia, Rome, 00143, Italy [2] University Campus Biomedico, 00100 Rome
| | - Michela Morbin
- Neuropathology &Neurology V - IRCCS Foundation C. Besta Milan, 20133, Italy
| | - Mario Marchi
- 1] Department of Pharmacy, Pharmacology and Toxicology Section, University of Genoa, Genoa, 16148, Italy [2] Center of Excellence for Biomedical Research, University of Genoa, Genoa, 16132, Italy
| | - Nicola B Mercuri
- Laboratory of Experimental Neurology, IRCCS Fondazione Santa Lucia, Rome, 00143, Italy
| | - Roger J Davis
- Department of Biochemistry and Molecular Biology, Howard Hughes Medical Institute and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, 01605, USA
| | - Anna Pittaluga
- 1] Department of Pharmacy, Pharmacology and Toxicology Section, University of Genoa, Genoa, 16148, Italy [2] Center of Excellence for Biomedical Research, University of Genoa, Genoa, 16132, Italy
| | - Marco Feligioni
- Laboratory of Pharmacology of Synaptic Plasticity, EBRI "Rita Levi-Montalcini" Foundation, Rome, 00143, Italy
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Feligioni M, Marcelli S, Knock E, Nadeem U, Arancio O, E. Fraser P. SUMO modulation of protein aggregation and degradation. AIMS MOLECULAR SCIENCE 2015. [DOI: 10.3934/molsci.2015.4.382] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Inhibition of p53 deSUMOylation exacerbates puromycin aminonucleoside-induced apoptosis in podocytes. Int J Mol Sci 2014; 15:21314-30. [PMID: 25411797 PMCID: PMC4264227 DOI: 10.3390/ijms151121314] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/04/2014] [Accepted: 11/05/2014] [Indexed: 11/17/2022] Open
Abstract
Apoptosis is a major cause of reduced podocyte numbers, which leads to proteinuria and/or glomerulosclerosis. Emerging evidence has indicated that deSUMOylation, a dynamic post-translational modification that reverses SUMOylation, is involved in the apoptosis of Burkitt’s lymphoma cells and cardiomyocytes; however, the impact of deSUMOylation on podocyte apoptosis remains unexplored. The p53 protein plays a major role in the pathogenesis of podocyte apoptosis, and p53 can be SUMOylated. Therefore, in the present study, we evaluated the effect of p53 deSUMOylation, which is regulated by sentrin/SUMO-specific protease 1 (SENP1), on podocyte apoptosis. Our results showed that SENP1 deficiency significantly increases puromycin aminonucleoside (PAN)-induced podocyte apoptosis. Moreover, SENP1 knockdown results in the accumulation of SUMOylated p53 protein and the increased expression of the p53 target pro-apoptotic genes, BAX, Noxa and PUMA, in podocytes during PAN stimulation. Thus, SENP1 may be essential for preventing podocyte apoptosis, at least partly through regulating the functions of p53 protein via deSUMOylation. The regulation of deSUMOylation may provide a novel strategy for the treatment of glomerular disorders that involve podocyte apoptosis.
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Hajmrle C, Ferdaoussi M, Plummer G, Spigelman AF, Lai K, Manning Fox JE, MacDonald PE. SUMOylation protects against IL-1β-induced apoptosis in INS-1 832/13 cells and human islets. Am J Physiol Endocrinol Metab 2014; 307:E664-73. [PMID: 25139051 PMCID: PMC4200309 DOI: 10.1152/ajpendo.00168.2014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Posttranslational modification by the small ubiquitin-like modifier (SUMO) peptides, known as SUMOylation, is reversed by the sentrin/SUMO-specific proteases (SENPs). While increased SUMOylation reduces β-cell exocytosis, insulin secretion, and responsiveness to GLP-1, the impact of SUMOylation on islet cell survival is unknown. Mouse islets, INS-1 832/13 cells, or human islets were transduced with adenoviruses to increase either SENP1 or SUMO1 or were transfected with siRNA duplexes to knockdown SENP1. We examined insulin secretion, intracellular Ca²⁺ responses, induction of endoplasmic reticulum stress markers and inducible nitric oxide synthase (iNOS) expression, and apoptosis by TUNEL and caspase 3 cleavage. Surprisingly, upregulation of SENP1 reduces insulin secretion and impairs intracellular Ca²⁺ handling. This secretory dysfunction is due to SENP1-induced cell death. Indeed, the detrimental effect of SENP1 on secretory function is diminished when two mediators of β-cell death, iNOS and NF-κB, are pharmacologically inhibited. Conversely, enhanced SUMOylation protects against IL-1β-induced cell death. This is associated with reduced iNOS expression, cleavage of caspase 3, and nuclear translocation of NF-κB. Taken together, these findings identify SUMO1 as a novel antiapoptotic protein in islets and demonstrate that reduced viability accounts for impaired islet function following SENP1 up-regulation.
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Affiliation(s)
- Catherine Hajmrle
- Department of Pharmacology and Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Mourad Ferdaoussi
- Department of Pharmacology and Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Gregory Plummer
- Department of Pharmacology and Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Aliya F Spigelman
- Department of Pharmacology and Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Krista Lai
- Department of Pharmacology and Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Jocelyn E Manning Fox
- Department of Pharmacology and Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Patrick E MacDonald
- Department of Pharmacology and Alberta Diabetes Institute, University of Alberta, Edmonton, Alberta, Canada
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Shen CC, Cui XY, He Y, Kang YH, Yi C, Yang JL, Gou LT. High Phosphorylation Status of AKT/mTOR Signal in DESI2-Reduced Pancreatic Ductal Adenocarcinoma. Pathol Oncol Res 2014; 21:267-72. [DOI: 10.1007/s12253-014-9817-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 06/25/2014] [Indexed: 12/12/2022]
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Yang P, Hu S, Yang F, Guan XQ, Wang SQ, Zhu P, Xiong F, Zhang S, Xu J, Yu QL, Wang CY. Sumoylation modulates oxidative stress relevant to the viability and functionality of pancreatic beta cells. Am J Transl Res 2014; 6:353-360. [PMID: 25075252 PMCID: PMC4113497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 05/09/2014] [Indexed: 06/03/2023]
Abstract
Sumoylation is an evolutionarily conserved regulatory mechanism to play an important role in various cellular processes through modulation of protein localization, stability and functionality. Recent studies including ours have consistently demonstrated that sumoylation provides protection for cells against oxidative stress. Given that pancreatic beta cells are a vulnerable target of oxidative stress, we thus in this minireview, updated the advancement of sumoylation in the regulation of ROS generation, and discussed its impact on several critical signaling pathways relevant to beta cells against oxidative stress and maintenance of functionality. Specifically, we bring together how sumoylation represses intracellular ROS formation, and protects beta cells against oxidative stress through regulating IκB/NFκB, JNK/c-Jun, and Maf/Nrf2 pathways. The tight implication of sumoylation in oxidative stress reflects that it could be an essential mechanism for beta cells to adapt to the detrimental cellular microenvironment.
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Affiliation(s)
- Ping Yang
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Shuang Hu
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Fei Yang
- Department of Immunology, Medical College of Yangtze University55 Jianghan Road, Jingzhou, Hubei 434023, China
| | - Xiang-Qian Guan
- Department of Clinical Immunology, Institute of Laboratory Medicine, Guangdong Medical CollegeDongguan 523808, China
| | - Shi-Qiang Wang
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Cardiovascular InstituteGuangzhou 510080, China
| | - Ping Zhu
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Cardiovascular InstituteGuangzhou 510080, China
| | - Fei Xiong
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Shu Zhang
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Junfa Xu
- Department of Clinical Immunology, Institute of Laboratory Medicine, Guangdong Medical CollegeDongguan 523808, China
| | - Qi-Lin Yu
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
| | - Cong-Yi Wang
- The Center for Biomedical Research, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology1095 Jiefang Ave., Wuhan 430030, China
- Department of Immunology, Medical College of Yangtze University55 Jianghan Road, Jingzhou, Hubei 434023, China
- Department of Clinical Immunology, Institute of Laboratory Medicine, Guangdong Medical CollegeDongguan 523808, China
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Chhunchha B, Fatma N, Kubo E, Singh DP. Aberrant sumoylation signaling evoked by reactive oxygen species impairs protective function of Prdx6 by destabilization and repression of its transcription. FEBS J 2014; 281:3357-81. [PMID: 24910119 DOI: 10.1111/febs.12866] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 05/24/2014] [Accepted: 06/05/2014] [Indexed: 12/20/2022]
Abstract
Loss of the cytoprotective protein peroxiredoxin 6 (Prdx6) in cells that are aging or under oxidative stress is known to be linked to the pathobiology of many age-related diseases. However, the mechanism by which Prdx6 activity goes awry is largely unknown. Using Prdx6-deficient (Prdx6(-/-) ) cells as a model for aging or redox active cells, human/mouse lens epithelial cells (LECs) facing oxidative stress and aging lenses, we found a significant increase in the levels of small ubiquitin-like modifier (Sumo)1 conjugates. These cells displayed increased levels of Sumo1 and reduced the expression of Prdx6. Specifically, we observed that Prdx6 is a target for aberrant sumoylation signaling, and that Sumo1 modification reduces its cellular abundance. LECs overexpressing Sumo1 showed reduced expression and activity of Prdx6 and its transactivator specificity protein 1 (Sp1), mRNA and protein with increased levels of reactive oxygen species; those cells were vulnerable to oxidative stress-induced cell death. A significant reduction in Prdx6, Sp1 protein and mRNA expression was observed in redox active Prdx6(-/-) cells and in aging lenses/LECs. The reduction was correlated with increased expression of Sumo1 and enrichment of the inactive form (dimeric) of Sumo-specific protease (Senp)1. Experiments with Sumo1-fused Prdx6 and Prdx6 promoter-linked to chloramphenicol acetyltransferase reporter gene constructs indicated that Sumo1 dysregulated Prdx6 activity by reducing its abundance and attenuating its transcription; in contrast, the delivery of Senp1 or Prdx6 reversed the process. The data show that reactive oxygen species-evoked aberrant sumoylation signaling affects Prdx6 activity by reducing Prdx6 abundance, as well as transcription. The findings of the present study may provide a foundation for a strategy to repair deleterious oxidative signaling generated by a reduced activity of Prdx6.
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Affiliation(s)
- Bhavana Chhunchha
- Ophthalmology and Visual Sciences, University of Nebraska Medical Center, Omaha, NE, USA
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Nisticò R, Ferraina C, Marconi V, Blandini F, Negri L, Egebjerg J, Feligioni M. Age-related changes of protein SUMOylation balance in the AβPP Tg2576 mouse model of Alzheimer's disease. Front Pharmacol 2014; 5:63. [PMID: 24778618 PMCID: PMC3985012 DOI: 10.3389/fphar.2014.00063] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 03/19/2014] [Indexed: 01/18/2023] Open
Abstract
Alzheimer's disease (AD) is a complex disorder that affects the central nervous system causing a severe neurodegeneration. This pathology affects an increasing number of people worldwide due to the overall aging of the human population. In recent years SUMO protein modification has emerged as a possible cellular mechanism involved in AD. Some of the proteins engaged in the physiopathological process of AD, like BACE1, GSK3-β tau, AβPP, and JNK, are in fact subject to protein SUMO modifications or interactions. Here, we have investigated the SUMO/deSUMOylation balance and SUMO-related proteins during the onset and progression of the pathology in the Tg2576 mouse model of AD. We examined four age-stages (1.5, 3, 6, 17 months old) and observed shows an increase in SUMO-1 protein conjugation at 3 and 6 months in transgenic mice with respect to WT in both cortex and hippocampus. Interestingly this is paralleled by increased expression levels of Ubc9 and SENP1 in both brain regions. At 6 months of age also the SUMO-1 mRNA resulted augmented. SUMO-2-ylation was surprisingly decreased in old transgenic mice and was unaltered in the other time windows. The fact that alterations in SUMO/deSUMOylation equilibrium occur from the early phases of AD suggests that global posttranslational modifications may play an important role in the mechanisms underlying disease pathogenesis, thus providing potential targets for pharmacological interventions.
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Affiliation(s)
- Robert Nisticò
- IRCCS Fondazione Santa Lucia Rome, Italy ; Department of Physiology and Pharmacology, Sapienza University of Rome Rome, Italy
| | - Caterina Ferraina
- Laboratory of Pharmacology of Synaptic Plasticity, EBRI "Rita Levi-Montalcini" Foundation Rome, Italy
| | - Veronica Marconi
- Department of Physiology and Pharmacology, Sapienza University of Rome Rome, Italy
| | - Fabio Blandini
- Center for Research in Neurodegenerative Diseases, C. Mondino National Neurological Institute Pavia, Italy
| | - Lucia Negri
- Department of Physiology and Pharmacology, Sapienza University of Rome Rome, Italy
| | - Jan Egebjerg
- Neuroscience Drug Discovery DK H. Lundbeck A/S, Valby, Denmark
| | - Marco Feligioni
- Laboratory of Pharmacology of Synaptic Plasticity, EBRI "Rita Levi-Montalcini" Foundation Rome, Italy
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Guo C, Henley JM. Wrestling with stress: roles of protein SUMOylation and deSUMOylation in cell stress response. IUBMB Life 2014; 66:71-7. [PMID: 24470405 DOI: 10.1002/iub.1244] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 01/13/2014] [Indexed: 12/13/2022]
Abstract
How cell fate is determined following extreme stress is a core question in cell biology. This is particularly important in the brain where neuronal death following ischemic stroke is a major cause of disability. Over the last few years it has emerged that the SUMOylation status of an increasing number of substrate proteins plays a crucial role in cellular responses to environmental and metabolic stress. SUMOylation is a post-translational modification in which the 97-residue protein, SUMO (Small Ubiquitin-related MOdifier) is covalently attached to specific lysine residues in a target protein. Despite being covalent, it is a highly transient modification because of the actions of deSUMOylation enzymes, so SUMO conjugation acts as a rapidly reversible switch that can promote or inhibit protein interactions with the substrate protein. Overall, it appears that increased SUMOylation represents a cellular protective response. Here we discuss recent progress toward understanding the mechanisms, pathways, and roles of SUMOylation during and after severe metabolic stress.
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Affiliation(s)
- Chun Guo
- School of Biochemistry, Medical Sciences Building, University of Bristol, University Walk, Bristol, BS8 1TD, UK
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Feligioni M, Nisticò R. SUMO: a (oxidative) stressed protein. Neuromolecular Med 2013; 15:707-19. [PMID: 24052421 DOI: 10.1007/s12017-013-8266-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 09/10/2013] [Indexed: 02/07/2023]
Abstract
Redox species are produced during the physiological cellular metabolism of a normal tissue. In turn, their presence is also attributed to pathological conditions including neurodegenerative diseases. Many are the molecular changes that occur during the unbalance of the redox homeostasis. Interestingly, posttranslational protein modifications (PTMs) play a remarkable role. In fact, several target proteins are modified in their activation, localization, aggregation, and expression after the cellular stress. Among PTMs, protein SUMOylation represents a very important molecular modification pathway during "oxidative stress". It has been reported that this ubiquitin-like modification is a fine sensor for redox species. Indeed, SUMOylation pathway efficiency is affected by the exposure to oxidative species in a different manner depending on the concentration and time of application. Thus, we here report updated evidence that states the role of SUMOylation in several pathological conditions, and we also outline the key involvement of c-Jun N-terminal kinase and small ubiquitin modifier pathway cross talk.
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Affiliation(s)
- Marco Feligioni
- Laboratory of Pharmacology of Synaptic Plasticity, EBRI "Rita Levi-Montalcini" Foundation, Via del Fosso di Fiorano 64/65, 00143, Rome, Italy,
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Che XF, Moriya S, Zheng CL, Abe A, Tomoda A, Miyazawa K. 2-Aminophenoxazine-3-one-induced apoptosis via generation of reactive oxygen species followed by c-jun N-terminal kinase activation in the human glioblastoma cell line LN229. Int J Oncol 2013; 43:1456-66. [PMID: 24008433 DOI: 10.3892/ijo.2013.2088] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 08/02/2013] [Indexed: 11/06/2022] Open
Abstract
2-Aminophenoxazine-3-one (Phx-3) induces apoptosis in several types of cancer cell lines. However, the mechanism of apoptosis induction by Phx-3 has not been fully elucidated. In this study, we investigated the anticancer effects of Phx-3 in the glioblastoma cell line LN229 and analyzed its molecular mechanism. The results indicated that 6- and 20-h treatment with Phx-3 significantly induced apoptosis in LN229 cells, with downregulation of survivin and XIAP. Both ERK and JNK, which are the members of the MAPK family, were activated after treatment with Phx-3. Inhibition of ERK using the specific inhibitor U0126 blocked the Phx-3-induced apoptosis only in part. However, inhibition of JNK using the specific inhibitor SP600125 completely prevented Phx-3-induced apoptosis and restored the phosphorylation states of ERK to the control levels. Enhanced generation of reactive oxygen species (ROS) was detected after 3-h treatment with Phx-3. In addition, the ROS scavenger melatonin almost completely blocked Phx-3-induced JNK activation and apoptosis. This suggests that JNK activation was mediated by Phx-3-induced ROS generation. Although SP600125 and melatonin completely blocked the reduction of mitochondrial membrane potential after a 3-h treatment with Phx-3, extension of Phx-3 exposure time to 20 h resulted in no cancelation of mitochondrial depolarization by these reagents. These reagents also had little effect on the decreased expression of survivin and XIAP during a 3-20-h exposure to Phx-3. These results indicate that the production of ROS following JNK activation is the main axis of Phx-3-induced apoptosis in LN229 cells for short-term exposure to Phx-3, whereas alternative mechanism(s) appear to be involved in apoptosis induction during long-term exposure to Phx-3.
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Affiliation(s)
- Xiao-Fang Che
- Department of Biochemistry, Tokyo Medical University, Shinjuku-ku, Tokyo 160-8402, Japan
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Silveirinha V, Stephens GJ, Cimarosti H. Molecular targets underlying SUMO-mediated neuroprotection in brain ischemia. J Neurochem 2013; 127:580-91. [PMID: 23786482 DOI: 10.1111/jnc.12347] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 06/14/2013] [Accepted: 06/17/2013] [Indexed: 01/11/2023]
Abstract
SUMOylation (small ubiquitin-like modifier conjugation) is an important post-translational modification which is becoming increasingly implicated in the altered protein dynamics associated with brain ischemia. The function of SUMOylation in cells undergoing ischemic stress and the identity of small ubiquitin-like modifier (SUMO) targets remain in most cases unknown. However, the emerging consensus is that SUMOylation of certain proteins might be part of an endogenous neuroprotective response. This review brings together the current understanding of the underlying mechanisms and downstream effects of SUMOylation in brain ischemia, including processes such as autophagy, mitophagy and oxidative stress. We focus on recent advances and controversies regarding key central nervous system proteins, including those associated with the nucleus, cytoplasm and plasma membrane, such as glucose transporters (GLUT1, GLUT4), excitatory amino acid transporter 2 glutamate transporters, K+ channels (K2P1, Kv1.5, Kv2.1), GluK2 kainate receptors, mGluR8 glutamate receptors and CB1 cannabinoid receptors, which are reported to be SUMO-modified. A discussion of the roles of these molecular targets for SUMOylation could play following an ischemic event, particularly with respect to their potential neuroprotective impact in brain ischemia, is proposed.
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Affiliation(s)
- Vasco Silveirinha
- School of Pharmacy, Hopkins Building, University of Reading, Whiteknights, Reading, UK
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45
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Hoppe JB, Rattray M, Tu H, Salbego CG, Cimarosti H. SUMO-1 conjugation blocks beta-amyloid-induced astrocyte reactivity. Neurosci Lett 2013; 546:51-6. [PMID: 23651519 DOI: 10.1016/j.neulet.2013.04.050] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 04/26/2013] [Accepted: 04/27/2013] [Indexed: 10/26/2022]
Abstract
Astrocyte reactivity is implicated in the neuronal loss underlying Alzheimer's disease. Curcumin has been shown to reduce astrocyte reactivity, though the exact pathways underlying these effects are incompletely understood. Here we investigated the role of the small ubiquitin-like modifier (SUMO) conjugation in mediating this effect of curcumin. In beta-amyloid (Aβ)-treated astrocytes, morphological changes and increased glial fibrillary acidic protein (GFAP) confirmed reactivity, which was accompanied by c-jun N-terminal kinase activation. Moreover, the levels of SUMO-1 conjugated proteins, as well as the conjugating enzyme, Ubc9, were decreased, with concomitant treatment with curcumin preventing these effects. Increasing SUMOylation in astrocytes, by over-expression of constitutively active SUMO-1, but not its inactive mutant, abrogated Aβ-induced increase in GFAP, suggesting astrocytes require SUMO-1 conjugation to remain non-reactive.
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Affiliation(s)
- Juliana B Hoppe
- Reading School of Pharmacy, University of Reading, Reading RG6 6UB, UK
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