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Zhang Y, Li JJ, Xu R, Wang XP, Zhao XY, Fang Y, Chen YP, Ma S, Di XH, Wu W, She G, Pang ZD, Wang YD, Zhang X, Xie W, Deng XL, Du XJ, Zhang Y. Nogo-B mediates endothelial oxidative stress and inflammation to promote coronary atherosclerosis in pressure-overloaded mouse hearts. Redox Biol 2023; 68:102944. [PMID: 37890359 PMCID: PMC10633694 DOI: 10.1016/j.redox.2023.102944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 10/19/2023] [Accepted: 10/19/2023] [Indexed: 10/29/2023] Open
Abstract
AIMS Endothelial dysfunction plays a pivotal role in atherosclerosis, but the detailed mechanism remains incomplete understood. Nogo-B is an endoplasmic reticulum (ER)-localized protein mediating ER-mitochondrial morphology. We previously showed endothelial Nogo-B as a key regulator of endothelial function in the setting of hypertension. Here, we aim to further assess the role of Nogo-B in coronary atherosclerosis in ApoE-/- mice with pressure overload. METHODS AND RESULTS We generated double knockout (DKO) mouse models of systemically or endothelium-specifically excising Nogo-A/B gene on an ApoE-/- background. After 7 weeks of transverse aortic constriction (TAC) surgery, compared to ApoE-/- mice DKO mice were resistant to the development of coronary atherosclerotic lesions and plaque rapture. Sustained elevation of Nogo-B and adhesion molecules (VCAM-1/ICAM-1), early markers of atherosclerosis, was identified in heart tissues and endothelial cells (ECs) isolated from TAC ApoE-/- mice, changes that were significantly repressed by Nogo-B deficiency. In cultured human umbilical vein endothelial cells (HUVECs) exposure to inflammatory cytokines (TNF-α, IL-1β), Nogo-B was upregulated and activated reactive oxide species (ROS)-p38-p65 signaling axis. Mitofusin 2 (Mfn2) is a key protein tethering ER to mitochondria in ECs, and we showed that Nogo-B expression positively correlated with Mfn2 protein level. And Nogo-B deletion in ECs or in ApoE-/- mice reduced Mfn2 protein content and increased ER-mitochondria distance, reduced ER-mitochondrial Ca2+ transport and mitochondrial ROS generation, and prevented VCAM-1/ICAM-1 upregulation and EC dysfunction, eventually restrained atherosclerotic lesions development. CONCLUSION Our study revealed that Nogo-B is a critical modulator in promoting endothelial dysfunction and consequent pathogenesis of coronary atherosclerosis in pressure overloaded hearts of ApoE-/- mice. Nogo-B may hold the promise to be a common therapeutic target in the setting of hypertension.
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Affiliation(s)
- Yu Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, And Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Jing-Jing Li
- Department of Cardiology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Rui Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xin-Pei Wang
- Department of Aerospace Medicine, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xin-Yi Zhao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, And Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Yuan Fang
- The Institute of Cardiovascular Sciences, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yu-Peng Chen
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, And Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Shan Ma
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, And Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Xiao-Hui Di
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Wei Wu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, And Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Gang She
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, And Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Zheng-Da Pang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, And Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Yi-Dong Wang
- Department of Cardiology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; The Institute of Cardiovascular Sciences, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xing Zhang
- Department of Aerospace Medicine, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Wenjun Xie
- Department of Cardiology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xiu-Ling Deng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, And Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Xiao-Jun Du
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, And Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Yi Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, And Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China.
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Sekine Y, Wang X, Kikkawa K, Honda S, Strittmatter SM. Amino-terminal proteolytic fragment of the axon growth inhibitor Nogo-A (Rtn4A) is upregulated by injury and promotes axon regeneration. J Biol Chem 2023; 299:105232. [PMID: 37690690 PMCID: PMC10622843 DOI: 10.1016/j.jbc.2023.105232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 08/28/2023] [Accepted: 08/31/2023] [Indexed: 09/12/2023] Open
Abstract
After adult mammalian central nervous system injury, axon regeneration is extremely limited or absent, resulting in persistent neurological deficits. Axon regeneration failure is due in part to the presence of inhibitory proteins, including NogoA (Rtn4A), from which two inhibitory domains have been defined. When these inhibitory domains are deleted, but an amino-terminal domain is still expressed in a gene trap line, mice show axon regeneration and enhanced recovery from injury. In contrast, when there is no amino-terminal Nogo-A fragment in the setting of inhibitory domain deletion, then axon regeneration and recovery are indistinguishable from WT. These data indicated that an amino-terminal Nogo-A fragment derived from the gene trap might promote axon regeneration, but this had not been tested directly and production of this fragment without gene targeting was unclear. Here, we describe posttranslation production of an amino-terminal fragment of Nogo-A from the intact gene product. This fragment is created by proteolysis near amino acid G214-N215 and levels are enhanced by axotomy. Furthermore, this fragment promotes axon regeneration in vitro and acts cell autonomously in neurons, in contrast to the inhibitory extracellular action of other Nogo-A domains.Proteins interacting with the amino-terminal Nogo-A fragment by immunoprecipitation include HSPA8 (HSC70, HSP7C). Suppression of HSPA8 expression by shRNA decreases axon regeneration from cerebral cortical neurons and overexpression increases axon regeneration. Moreover, the amino-terminal Nogo-A fragment increases HSPA8 chaperone activity. These data provide an explanation for varied results in different gene-targeted Nogo-A mice, as well as revealing an axon regeneration promoting domain of Nogo-A.
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Affiliation(s)
- Yuichi Sekine
- Department of Neuroscience and Neurology, Cellular Neuroscience, Neurodegeneration & Repair Program, Yale School of Medicine, New Haven, Connecticut, USA; Department of Cell Biology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Xingxing Wang
- Department of Neuroscience and Neurology, Cellular Neuroscience, Neurodegeneration & Repair Program, Yale School of Medicine, New Haven, Connecticut, USA
| | - Kazuna Kikkawa
- Department of Cell Biology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Sachie Honda
- Department of Cell Biology, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Stephen M Strittmatter
- Department of Neuroscience and Neurology, Cellular Neuroscience, Neurodegeneration & Repair Program, Yale School of Medicine, New Haven, Connecticut, USA.
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Ruknudin P, Nazari AR, Wirth M, Lahaie I, Bajon E, Rivard A, Chemtob S, Desjarlais M. Novel Function of Nogo-A as Negative Regulator of Endothelial Progenitor Cell Angiogenic Activity: Impact in Oxygen-Induced Retinopathy. Int J Mol Sci 2023; 24:13185. [PMID: 37685993 PMCID: PMC10488245 DOI: 10.3390/ijms241713185] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/17/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023] Open
Abstract
Endothelial Progenitor Cells (EPCs) can actively participate in revascularization in oxygen-induced retinopathy (OIR). Yet the mechanisms responsible for their dysfunction is unclear. Nogo-A, whose function is traditionally related to the inhibition of neurite function in the central nervous system, has recently been documented to display anti-angiogenic pro-repellent properties. Based on the significant impact of EPCs in retinal vascularization, we surmised that Nogo-A affects EPC function, and proceeded to investigate the role of Nogo-A on EPC function in OIR. The expression of Nogo-A and its specific receptor NgR1 was significantly increased in isolated EPCs exposed to hyperoxia, as well as in EPCs isolated from rats subjected to OIR compared with respective controls (EPCs exposed to normoxia). EPCs exposed to hyperoxia displayed reduced migratory and tubulogenic activity, associated with the suppressed expression of prominent EPC-recruitment factors SDF-1/CXCR4. The inhibition of Nogo-A (using a Nogo-66 neutralizing antagonist peptide) or siRNA-NGR1 in hyperoxia-exposed EPCs restored SDF-1/CXCR4 expression and, in turn, rescued the curtailed neovascular functions of EPCs in hyperoxia. The in vivo intraperitoneal injection of engineered EPCs (Nogo-A-inhibited or NgR1-suppressed) in OIR rats at P5 (prior to exposure to hyperoxia) prevented retinal and choroidal vaso-obliteration upon localization adjacent to vasculature; coherently, the inhibition of Nogo-A/NgR1 in EPCs enhanced the expression of key angiogenic factors VEGF, SDF-1, PDGF, and EPO in retina; CXCR4 knock-down abrogated suppressed NgR1 pro-angiogenic effects. The findings revealed that hyperoxia-induced EPC malfunction is mediated to a significant extent by Nogo-A/NgR1 signaling via CXCR4 suppression; the inhibition of Nogo-A in EPCs restores specific angiogenic growth factors in retina and the ensuing vascularization of the retina in an OIR model.
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Affiliation(s)
- Pakiza Ruknudin
- Department of Ophthalmology, Maisonneuve-Rosemont Hospital Research Center, University of Montréal, Montréal, QC H1T 2H2, Canada
| | - Ali Riza Nazari
- Department of Ophthalmology, Maisonneuve-Rosemont Hospital Research Center, University of Montréal, Montréal, QC H1T 2H2, Canada
| | - Maelle Wirth
- Department of Ophthalmology, Maisonneuve-Rosemont Hospital Research Center, University of Montréal, Montréal, QC H1T 2H2, Canada
- Departments of Pediatrics, Ophthalmology and Pharmacology, Centre Hospitalier Universitaire Sainte-Justine Research Center, Montréal, QC H1T 2H2, Canada
| | - Isabelle Lahaie
- Department of Ophthalmology, Maisonneuve-Rosemont Hospital Research Center, University of Montréal, Montréal, QC H1T 2H2, Canada
| | - Emmanuel Bajon
- Departments of Pediatrics, Ophthalmology and Pharmacology, Centre Hospitalier Universitaire Sainte-Justine Research Center, Montréal, QC H1T 2H2, Canada
| | - Alain Rivard
- Department of Medicine, Centre Hospitalier de l’Université de Montréal (CHUM) Research Center, Montréal, QC H1T 2H2, Canada
| | - Sylvain Chemtob
- Department of Ophthalmology, Maisonneuve-Rosemont Hospital Research Center, University of Montréal, Montréal, QC H1T 2H2, Canada
- Departments of Pediatrics, Ophthalmology and Pharmacology, Centre Hospitalier Universitaire Sainte-Justine Research Center, Montréal, QC H1T 2H2, Canada
| | - Michel Desjarlais
- Department of Ophthalmology, Maisonneuve-Rosemont Hospital Research Center, University of Montréal, Montréal, QC H1T 2H2, Canada
- Departments of Pediatrics, Ophthalmology and Pharmacology, Centre Hospitalier Universitaire Sainte-Justine Research Center, Montréal, QC H1T 2H2, Canada
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Kratzel A, Thiel V. RTN3 and RTN4: Architects of SARS-CoV-2 replication organelles. J Cell Biol 2023; 222:e202306020. [PMID: 37318453 PMCID: PMC10274048 DOI: 10.1083/jcb.202306020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023] Open
Abstract
SARS-CoV-2 depends on host proteins for successful replication. In this issue, Williams et al. (2023. J. Cell Biol.https://doi.org/10.1083/jcb.202203060) report that the ER membrane-modulating proteins RTN3 and RTN4 are required for the formation of SARS-CoV-2 replication organelles via direct interaction with viral proteins NSP3 and NSP4.
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Affiliation(s)
- Annika Kratzel
- Institute of Virology and Immunology (IVI), Bern, Switzerland
- Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Volker Thiel
- Institute of Virology and Immunology (IVI), Bern, Switzerland
- Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
- Multidisciplinary Center for Infectious Diseases (MCID), University of Bern, Bern, Switzerland
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5
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Demirdizen E, Al-Ali R, Narayanan A, Sun X, Varga JP, Steffl B, Brom M, Krunic D, Schmidt C, Schmidt G, Bestvater F, Taranda J, Turcan Ş. TRIM67 drives tumorigenesis in oligodendrogliomas through Rho GTPase-dependent membrane blebbing. Neuro Oncol 2023; 25:1031-1043. [PMID: 36215168 PMCID: PMC10237422 DOI: 10.1093/neuonc/noac233] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND IDH mutant gliomas are grouped into astrocytomas or oligodendrogliomas depending on the codeletion of chromosome arms 1p and 19q. Although the genomic alterations of IDH mutant gliomas have been well described, transcriptional changes unique to either tumor type have not been fully understood. Here, we identify Tripartite Motif Containing 67 (TRIM67), an E3 ubiquitin ligase with essential roles during neuronal development, as an oncogene distinctly upregulated in oligodendrogliomas. METHODS We used several cell lines, including patient-derived oligodendroglioma tumorspheres, to knock down or overexpress TRIM67. We coupled high-throughput assays, including RNA sequencing, total lysate-mass spectrometry (MS), and coimmunoprecipitation (co-IP)-MS with functional assays including immunofluorescence (IF) staining, co-IP, and western blotting (WB) to assess the in vitro phenotype associated with TRIM67. Patient-derived oligodendroglioma tumorspheres were orthotopically implanted in mice to determine the effect of TRIM67 on tumor growth and survival. RESULTS TRIM67 overexpression alters the abundance of cytoskeletal proteins and induces membrane bleb formation. TRIM67-associated blebbing was reverted with the nonmuscle class II myosin inhibitor blebbistatin and selective ROCK inhibitor fasudil. NOGO-A/Rho GTPase/ROCK2 signaling is altered upon TRIM67 ectopic expression, pointing to the underlying mechanism for TRIM67-induced blebbing. Phenotypically, TRIM67 expression resulted in higher cell motility and reduced cell adherence. In orthotopic implantation models of patient-derived oligodendrogliomas, TRIM67 accelerated tumor growth, reduced overall survival, and led to increased vimentin expression at the tumor margin. CONCLUSIONS Taken together, our results demonstrate that upregulated TRIM67 induces blebbing-based rounded cell morphology through Rho GTPase/ROCK-mediated signaling thereby contributing to glioma pathogenesis.
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Affiliation(s)
- Engin Demirdizen
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, Heidelberg, Germany
| | - Ruslan Al-Ali
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, Heidelberg, Germany
| | - Ashwin Narayanan
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, Heidelberg, Germany
| | - Xueyuan Sun
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, Heidelberg, Germany
- Clinical Cooperation Unit Neurooncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Julianna Patricia Varga
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, Heidelberg, Germany
| | - Bianca Steffl
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, Heidelberg, Germany
- Clinical Cooperation Unit Neurooncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Manuela Brom
- Core Facility Unit Light Microscopy, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Damir Krunic
- Core Facility Unit Light Microscopy, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Claudia Schmidt
- Core Facility Unit Light Microscopy, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Gabriele Schmidt
- Core Facility Unit Light Microscopy, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Felix Bestvater
- Core Facility Unit Light Microscopy, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Julian Taranda
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, Heidelberg, Germany
| | - Şevin Turcan
- Neurology Clinic and National Center for Tumor Diseases, University Hospital Heidelberg, INF 460, Heidelberg, Germany
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Sasset L, Manzo OL, Zhang Y, Marino A, Rubinelli L, Riemma MA, Chalasani MLS, Dasoveanu DC, Roviezzo F, Jankauskas SS, Santulli G, Bucci MR, Lu TT, Di Lorenzo A. Nogo-A reduces ceramide de novo biosynthesis to protect from heart failure. Cardiovasc Res 2023; 119:506-519. [PMID: 35815623 PMCID: PMC10226746 DOI: 10.1093/cvr/cvac108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/24/2022] [Accepted: 06/14/2022] [Indexed: 11/13/2022] Open
Abstract
AIMS Growing evidence correlate the accrual of the sphingolipid ceramide in plasma and cardiac tissue with heart failure (HF). Regulation of sphingolipid metabolism in the heart and the pathological impact of its derangement remain poorly understood. Recently, we discovered that Nogo-B, a membrane protein of endoplasmic reticulum, abundant in the vascular wall, down-regulates the sphingolipid de novo biosynthesis via serine palmitoyltransferase (SPT), first and rate liming enzyme, to impact vascular functions and blood pressure. Nogo-A, a splice isoform of Nogo, is transiently expressed in cardiomyocyte (CM) following pressure overload. Cardiac Nogo is up-regulated in dilated and ischaemic cardiomyopathies in animals and humans. However, its biological function in the heart remains unknown. METHODS AND RESULTS We discovered that Nogo-A is a negative regulator of SPT activity and refrains ceramide de novo biosynthesis in CM exposed to haemodynamic stress, hence limiting ceramide accrual. At 7 days following transverse aortic constriction (TAC), SPT activity was significantly up-regulated in CM lacking Nogo-A and correlated with ceramide accrual, particularly very long-chain ceramides, which are the most abundant in CM, resulting in the suppression of 'beneficial' autophagy. At 3 months post-TAC, mice lacking Nogo-A in CM showed worse pathological cardiac hypertrophy and dysfunction, with ca. 50% mortality rate. CONCLUSION Mechanistically, Nogo-A refrains ceramides from accrual, therefore preserves the 'beneficial' autophagy, mitochondrial function, and metabolic gene expression, limiting the progression to HF under sustained stress.
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Affiliation(s)
- Linda Sasset
- Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, 1300 York Avenue, New York, NY 10065, USA
| | - Onorina Laura Manzo
- Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, 1300 York Avenue, New York, NY 10065, USA
- Department of Pharmacy, School of Medicine, University of Naples Federico II, via Domenico Montesano 49, Naples 80131, Italy
| | - Yi Zhang
- Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, 1300 York Avenue, New York, NY 10065, USA
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi 710061, China
| | - Alice Marino
- Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, 1300 York Avenue, New York, NY 10065, USA
| | - Luisa Rubinelli
- Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, 1300 York Avenue, New York, NY 10065, USA
| | - Maria Antonietta Riemma
- Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, 1300 York Avenue, New York, NY 10065, USA
- Department of Pharmacy, School of Medicine, University of Naples Federico II, via Domenico Montesano 49, Naples 80131, Italy
| | - Madhavi Latha S Chalasani
- Department of Microbiology and Immunology, Autoimmunity and Inflammation Program, Hospital for Special Surgery Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Dragos C Dasoveanu
- Department of Microbiology and Immunology, Autoimmunity and Inflammation Program, Hospital for Special Surgery Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Fiorentina Roviezzo
- Department of Pharmacy, School of Medicine, University of Naples Federico II, via Domenico Montesano 49, Naples 80131, Italy
| | - Stanislovas S Jankauskas
- Department of Medicine (Cardiology) and Department of Molecular Pharmacology, Wilf Family Cardiovascular Research Institute, Einstein Institute for Aging Research, Fleischer Institute for Diabetes and Metabolism (FIDAM), Einstein-Mount Sinai Diabetes Research Center (ES-DRC), Albert Einstein College of Medicine, New York, NY 10461, USA
| | - Gaetano Santulli
- Department of Medicine (Cardiology) and Department of Molecular Pharmacology, Wilf Family Cardiovascular Research Institute, Einstein Institute for Aging Research, Fleischer Institute for Diabetes and Metabolism (FIDAM), Einstein-Mount Sinai Diabetes Research Center (ES-DRC), Albert Einstein College of Medicine, New York, NY 10461, USA
| | - Maria Rosaria Bucci
- Department of Pharmacy, School of Medicine, University of Naples Federico II, via Domenico Montesano 49, Naples 80131, Italy
| | - Theresa T Lu
- Department of Microbiology and Immunology, Autoimmunity and Inflammation Program, Hospital for Special Surgery Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Annarita Di Lorenzo
- Department of Pathology and Laboratory Medicine, Cardiovascular Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, 1300 York Avenue, New York, NY 10065, USA
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7
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Rodriguez CM, Bechek SC, Jones GL, Nakayama L, Akiyama T, Kim G, Solow-Cordero DE, Strittmatter SM, Gitler AD. Targeting RTN4/NoGo-Receptor reduces levels of ALS protein ataxin-2. Cell Rep 2022; 41:111505. [PMID: 36288715 PMCID: PMC9664481 DOI: 10.1016/j.celrep.2022.111505] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 05/30/2022] [Accepted: 09/22/2022] [Indexed: 01/27/2023] Open
Abstract
Gene-based therapeutic strategies to lower ataxin-2 levels are emerging for the neurodegenerative diseases amyotrophic lateral sclerosis (ALS) and spinocerebellar ataxia type 2 (SCA2). Additional strategies to lower levels of ataxin-2 could be beneficial. Here, we perform a genome-wide arrayed small interfering RNA (siRNA) screen in human cells and identify RTN4R, the gene encoding the RTN4/NoGo-Receptor, as a potent modifier of ataxin-2 levels. RTN4R knockdown, or treatment with a peptide inhibitor, is sufficient to lower ataxin-2 protein levels in mouse and human neurons in vitro, and Rtn4r knockout mice have reduced ataxin-2 levels in vivo. We provide evidence that ataxin-2 shares a role with the RTN4/NoGo-Receptor in limiting axonal regeneration. Reduction of either protein increases axonal regrowth following axotomy. These data define the RTN4/NoGo-Receptor as a novel therapeutic target for ALS and SCA2 and implicate the targeting of ataxin-2 as a potential treatment following nerve injury.
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Affiliation(s)
- Caitlin M Rodriguez
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Sophia C Bechek
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Graham L Jones
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Lisa Nakayama
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Tetsuya Akiyama
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Garam Kim
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA; Stanford Neurosciences Interdepartmental Program, Stanford University School of Medicine, Stanford, CA, USA
| | - David E Solow-Cordero
- High-Throughput Bioscience Center, Department of Chemical and Systems Biology, Stanford University, Stanford, CA, USA
| | - Stephen M Strittmatter
- Program in Cellular Neuroscience, Neurodegeneration and Repair, Yale University School of Medicine, New Haven, CT, USA
| | - Aaron D Gitler
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA.
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8
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Kragness S, Clark Z, Mullin A, Guidry J, Earls LR. An Rtn4/Nogo-A-interacting micropeptide modulates synaptic plasticity with age. PLoS One 2022; 17:e0269404. [PMID: 35771867 PMCID: PMC9246188 DOI: 10.1371/journal.pone.0269404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 05/18/2022] [Indexed: 11/18/2022] Open
Abstract
Micropeptides, encoded from small open reading frames of 300 nucleotides or less, are hidden throughout mammalian genomes, though few functional studies of micropeptides in the brain are published. Here, we describe a micropeptide known as the Plasticity–Associated Neural Transcript Short (Pants), located in the 22q11.2 region of the human genome, the microdeletion of which conveys a high risk for schizophrenia. Our data show that Pants is upregulated in early adulthood in the mossy fiber circuit of the hippocampus, where it exerts a powerful negative effect on long-term potentiation (LTP). Further, we find that Pants is secreted from neurons, where it associates with synapses but is rapidly degraded with stimulation. Pants dynamically interacts with Rtn4/Nogo-A, a well-studied regulator of adult plasticity. Pants interaction with Nogo-A augments its influence over postsynaptic AMPA receptor clustering, thus gating plasticity at adult synapses. This work shows that neural micropeptides can act as architectural modules that increase the functional diversity of the known proteome.
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Affiliation(s)
- S. Kragness
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
| | - Z. Clark
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
| | - A. Mullin
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
- Tulane University Transgenic Core Facility, New Orleans, LA, United States of America
| | - J. Guidry
- Department of Biochemistry and Molecular Biology, LSU School of Medicine and Health Sciences Center, New Orleans, LA, United States of America
- The Proteomics Core Facility, LSUHSC, New Orleans, LA, United States of America
| | - L. R. Earls
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
- * E-mail:
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Min YJ, Hong DY, Yao HH, Ye WG, Cheng LH, Wang ZQ. [Effect of moxibustion on Nogo/neurotrophin receptor signaling pathway in rats with cerebral ischemia/reperfusion injury]. Zhen Ci Yan Jiu 2022; 47:401-408. [PMID: 35616413 DOI: 10.13702/j.1000-0607.20210592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To observe the effect of moxibustion treatment on the expression of Nogo-A, Nogo receptor (NgR), neurotrophin receptor p75 (p75NTR) and leucine rich repeat and Ig domain containing 1 (Lingo-1) in brain tissue of rats with cerebral ischemia/reperfusion injury (CI/RI), so as to analyze its mechanism underlying improvement of CI/RI. METHODS Male SD rats were randomly divided into sham operation group (16 rats), model group (17 rats), NEP1-40 (extracellular peptide residues 1-40, a blocker targeting NgR) group (model+blocker, 17 rats) and moxibustion group (model+moxibustion, 17 rats). The CI/RI model was established by occlusion of the left middle cerebral artery (MCAO). Moxibustion was applied to "Baihui"(GV20), right "Quchi"(LI11) and "Zusanli"(ST36) for 20 min, once a day for 14 days, with 2 days' rest after the top 7 days' intervention. For rats of the NEP1-40 group, 30 μL PBS containing 18 μg NEP 1-40 was injected into the epidural inferior vena (L5-S1) via a polyvinyl chloride conduit. The neurological deficit state in each group was evaluated by Longa's 5-point scale and Feeney's 7-point scale of beam walking test (BWT). The cerebral infarct volume was assessed by 2,3,5-triphenyltetrazole chloride staining. The brain tissue between the central anterior and posterior sulcus was taken for observing the expression of NgR and Lingo-1 by fluorescence double-label method, and for determining the expression levels of Nogo-A, NgR, p75NTR and Lingo-1 mRNAs and proteins by real-time quantitative PCR and Western blot, respectively. RESULTS After modeling, the Longa's score, infarct volu-me percent, expression levels of Nogo-A, NgR, Lingo-1 and p75NTR mRNAs and proteins were significantly increased (P<0.01) and BWT score was obviously decreased (P<0.01) in the model group relevant to the sham operation group. In comparison with the model group, the increase of Longa's score, infarct volume percentage, expression levels of Nogo-A, NgR, Lingo-1 and p75NTR mRNAs and proteins and decrease of BWT score in NEP1-40 and moxibustion groups were reversed (P<0.01) except Nogo-A protein in the NEP1-40 group. The effect of moxibustion was significantly superior to that of blocker NEP1-40 in redu-cing the infarct volume percentage, and down-regulating the expression of Nogo-A mRNA and protein, p75NTR mRNA and protein, NgR and Lingo-1 proteins (P<0.01, P<0.05). CONCLUSION Moxibustion, similar to blocker NEP1-40 of NgR, can improve neurological dysfunction in CI/RI rats, which may be related to its functions in reducing cerebral infarction and down-regulating the activity of Nogo/neurotrophin receptor signaling pathway.
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Affiliation(s)
- You-Jiang Min
- The Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang 330006, China; Department of Traditional Chinese Medicine, Shanghai Eighth People's Hospital, Shanghai 200235; School of Traditional Chinese Medicine, Nanchang Medical College, Nanchang 330052
| | - Dong-Ying Hong
- Department of Traditional Chinese Medicine, Shanghai Shunchang Hospital, Shanghai 200025
| | - Hai-Hua Yao
- Department of Traditional Chinese Medicine, Shanghai Eighth People's Hospital, Shanghai 200235
| | - Wen-Guo Ye
- The Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Li-Hong Cheng
- The Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang 330006, China
| | - Zhi-Qin Wang
- The Affiliated Hospital of Jiangxi University of Chinese Medicine, Nanchang 330006, China
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10
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Zhu Y, Zhang LQ, Li JD. [Biological function of Nogo-B receptor]. Sheng Li Xue Bao 2022; 74:301-308. [PMID: 35503078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nogo-B receptor (NgBR) is a specific receptor of Nogo-B, a member of reticulon 4 protein family. It is widely expressed in many tissues and mainly located in cell membrane and endoplasmic reticulum. Previous studies have revealed that NgBR is involved in a variety of physiological and pathophysiological processes, such as dolichol synthesis, lipid metabolism, cholesterol trafficking, insulin resistance, vascular remodeling and angiogenesis, tumorigenesis and nervous system diseases. Further studies on the molecular characteristics and biological function of NgBR might be of great significance to understand its role in diverse diseases and provide possible clinical strategies for the treatment of diseases.
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Affiliation(s)
- Ying Zhu
- Department of Respiratory and Critical Care Medicine, Eighth Medical Center of Chinese PLA General Hospital, Beijing 100091, China
| | - Li-Qun Zhang
- Department of Respiratory and Critical Care Medicine, Eighth Medical Center of Chinese PLA General Hospital, Beijing 100091, China
| | - Jian-Dong Li
- Department of Respiratory and Critical Care Medicine, Eighth Medical Center of Chinese PLA General Hospital, Beijing 100091, China.
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Wong CH, Lou UK, Fung FKC, Tong JHM, Zhang CH, To KF, Chan SL, Chen Y. CircRTN4 promotes pancreatic cancer progression through a novel CircRNA-miRNA-lncRNA pathway and stabilizing epithelial-mesenchymal transition protein. Mol Cancer 2022; 21:10. [PMID: 34983537 PMCID: PMC8725379 DOI: 10.1186/s12943-021-01481-w] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 12/13/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Circular RNAs (circRNAs) play important roles in many biological processes. However, the detailed mechanism underlying the critical roles of circRNAs in cancer remains largely unexplored. We aim to explore the molecular mechanisms of circRTN4 with critical roles in pancreatic ductal adenocarcinoma (PDAC). METHODS CircRTN4 expression level was examined in PDAC primary tumors. The oncogenic roles of circRTN4 in PDAC tumor growth and metastasis were studied in mouse tumor models. Bioinformatics analysis, luciferase assay and miRNA pulldown assay were performed to study the novel circRTN4-miRNA-lncRNA pathway. To identify circRTN4-interacting proteins, we performed circRNA-pulldown and mass spectrometry in PDAC cells. Protein stability assay and 3-Dimensional structure modeling were performed to reveal the role of circRTN4 in stabilizing RAB11FIP1. RESULTS CircRTN4 was significantly upregulated in primary tumors from PDAC patients. In vitro and in vivo functional studies revealed that circRTN4 promoted PDAC tumor growth and liver metastasis. Mechanistically, circRTN4 interacted with tumor suppressor miR-497-5p in PDAC cells. CircRTN4 knockdown upregulated miR-497-5p to inhibit the oncogenic lncRNA HOTTIP expression. Furthermore, we identified critical circRTN4-intercting proteins by circRNA-pulldown in PDAC cells. CircRTN4 interacted with important epithelial-mesenchymal transition (EMT)- driver RAB11FIP1 to block its ubiquitination site. We found that circRTN4 knockdown promoted the degradation of RAB11FIP1 by increasing its ubiquitination. Also, circRTN4 knockdown inhibited the expression of RAB11FIP1-regulating EMT-markers Slug, Snai1, Twist, Zeb1 and N-cadherin in PDAC. CONCLUSION The upregulated circRTN4 promotes tumor growth and liver metastasis in PDAC through the novel circRTN4-miR-497-5p-HOTTIP pathway. Also, circRTN4 stabilizes RAB11FIP1 to contribute EMT.
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Affiliation(s)
- Chi Hin Wong
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Ut Kei Lou
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Frederic Khe-Cheong Fung
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Joanna H M Tong
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Chang-Hua Zhang
- Digestive Medicine Center, The Seventh Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China
| | - Ka-Fai To
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Stephen Lam Chan
- Department of Clinical Oncology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Yangchao Chen
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong.
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, 518087, China.
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Hong L, Chen W, He L, Tan H, Peng D, Zhao G, Shi X, Wang L, Liu M, Jiang H. Effect of Naoluoxintong on the NogoA/RhoA/ROCK pathway by down-regulating DNA methylation in MCAO rats. J Ethnopharmacol 2021; 281:114559. [PMID: 34461189 DOI: 10.1016/j.jep.2021.114559] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/17/2021] [Accepted: 08/21/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Naoluoxintong (NLXT) is a traditional Chinese Medicine (TCM) prescription that is clinically used in the treatment of ischemic stroke (IS). However, its therapeutic mechanism remains unclear. AIM OF THE STUDY To obtain the mechanism of NLXT by observing the protective effects of NLXT on the NogoA/RhoA/Rock pathway in a rat model of IS by regulating DNA methylation. MATERIALS AND METHODS Rats were divided into five groups using a random number table: normal group, model group, NLXT group, blocker group I (NLXT + SGI-1027) and blocker group II (NLXT + Y27632). The right middle cerebral artery occlusion-reperfusion (MCAO/R) rat model was made, and the regional cerebral blood flow (rCBF) of each group was detected using laser Doppler. The methylation levels of CpG sites of neurite outgrowth inhibitor protein-A (Nogo-A), Nogo receptor (NgR), ras homolog gene family member A (RhoA) and rho-associated coiled-coil protein kinase 2 (ROCK2) genes in rat brain tissue were detected using the bisulfite method. Reverse transcription-polymerase chain reaction (RT-PCR) was used to detect NogoA, RhoA, NgR1, NgR2 and ROCK2 mRNA expression in rat brain tissue. NogoA, RhoA, NgR1, NgR2 and ROCK2 proteins were detected using immunoblotting in rat brain tissue. RESULTS After the modeling of middle cerebral artery occlusion (MCAO), neurological deficit test was made to ensure the success of the modeling. At each time point after surgery, the rCBF of the other groups decreased compared with the normal group (P < 0.01 or P < 0.05). Meanwhile, the rCBF increased in blocker group I as well as blocker group II after 3 days (P < 0.05). There were differences in the DNA methylation sites of NogoA, RhoA, NgR and ROCK2 genes between the model group and the NLXT group (P < 0.05). Compared with the normal group, NogoA, NgR1, NgR2, RhoA and ROCK2 gene expression in the model group increased observably (P < 0.01). In comparison with the model group, NogoA and NgR1 gene expression in the blocker group II was prominently observed on the 1st day. NogoA, NgR1, NgR2, RhoA and ROCK2 gene expression remarkably reduced (P < 0.01) on the 3rd and 7th days. Compared with the normal group, NogoA, RhoA, NgR1, NgR2 and ROCK2 protein expression in the model group increased observably (P < 0.01). In comparison with the model group, NogoA, RhoA, NgR1, NgR2 and ROCK2 protein expression in the other groups declined prominently (P < 0.01). CONCLUSION NLXT can reduce the DNA methylation level of NogoA pathway after IS, thus inhibit the expression of NogoA/RhoA/ROCK pathway from producing anti-cerebral ischemia pharmacological effect.
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Affiliation(s)
- Lu Hong
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China
| | - Weidong Chen
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei, Anhui, 230012, China
| | - Ling He
- Key Laboratory of Xin'an Medicine Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China; School of Traditional Chinese Medicine, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China.
| | - Hui Tan
- Key Laboratory of Xin'an Medicine Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China; School of Traditional Chinese Medicine, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China
| | - Daiyin Peng
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei, Anhui, 230012, China
| | - Guodong Zhao
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China
| | - Xiaoqian Shi
- Department of Pharmacy, Huaibei People's Hospital, Huaibei, Anhui, 235000, China
| | - Lei Wang
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei, Anhui, 230012, China
| | - Mingming Liu
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China
| | - Huihui Jiang
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui, 230012, China
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Fan P, Zhang L, Cheng T, Wang J, Zhou J, Zhao L, Hua C, Xia Q. MiR-590-5p inhibits pathological hypertrophy mediated heart failure by targeting RTN4. J Mol Histol 2021; 52:955-964. [PMID: 34406553 DOI: 10.1007/s10735-021-10009-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 08/08/2021] [Indexed: 10/20/2022]
Abstract
Heart failure (HF) is a rising epidemic and public health burden in modern society. It is of great need to find new biomarkers to ensure a timely diagnosis and to improve treatment and prognosis of the disease. The mouse model of HF was established by thoracic aortic constriction. Color Doppler ultrasound was performed to detect left ventricular end-diastolic diameter. Hematoxylin and eosin staining was conducted to observe the pathological changes of mouse myocardium. The RT-qPCR analysis was performed to detect miR-590-5p and RTN4 expression levels. Western blot was conducted to detect protein levels of the indicated genes. We found that the expression of miR-590-5p was downregulated in cardiac tissues of HF mice. Injection of AAV-miR-590-5p attenuated myocardium hypertrophy and myocyte apoptosis. Additionally, miR-590-5p overexpression promoted viability, inhibited apoptosis, and decreased ANF, BNP and beta-MHC protein levels in H9c2 cell. Mechanistically, miR-590-5p binds to RTN4 3'-untranslated region, as predicted by starBase online database and evidenced by luciferase reporter assay. Furthermore, miR-590-5p negatively regulates RTN4 mRNA expression and suppresses its translation. The final rescue experiments revealed that miR-590-5p modulated cardiomyocyte phenotypes by binding to RTN4. In conclusion, miR-590-5p modulates myocardium hypertrophy and myocyte apoptosis in HF by downregulating RTN4.
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Affiliation(s)
- Ping Fan
- Department of Cardiovascular Medicine, The Air Force Hospital From Eastern Theater, Qinhuai District, No. 1, Malu Street, Nanjing, 210001, Jiangsu, China
| | - Likun Zhang
- Department of Cardiovascular Medicine, The Air Force Hospital From Eastern Theater, Qinhuai District, No. 1, Malu Street, Nanjing, 210001, Jiangsu, China
| | - Tianyu Cheng
- Department of Cardiovascular Medicine, The Air Force Hospital From Eastern Theater, Qinhuai District, No. 1, Malu Street, Nanjing, 210001, Jiangsu, China
| | - Jing Wang
- Department of Cardiovascular Medicine, The Air Force Hospital From Eastern Theater, Qinhuai District, No. 1, Malu Street, Nanjing, 210001, Jiangsu, China
- Department of General Practice, Confucius Temple Community Health Service Center, Nanjing, 210001, Jiangsu, China
| | - Junyun Zhou
- Department of Cardiovascular Medicine, The Air Force Hospital From Eastern Theater, Qinhuai District, No. 1, Malu Street, Nanjing, 210001, Jiangsu, China
| | - Li Zhao
- Department of Cardiovascular Medicine, The Air Force Hospital From Eastern Theater, Qinhuai District, No. 1, Malu Street, Nanjing, 210001, Jiangsu, China
| | - Cuie Hua
- Department of Cardiovascular Medicine, The Air Force Hospital From Eastern Theater, Qinhuai District, No. 1, Malu Street, Nanjing, 210001, Jiangsu, China.
| | - Quan Xia
- Department of Cardiovascular Medicine, The Air Force Hospital From Eastern Theater, Qinhuai District, No. 1, Malu Street, Nanjing, 210001, Jiangsu, China.
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Chen L, Hu Q, Liu H, Zhao Y, Chan SO, Wang J. Nogo-A Induced Polymerization of Microtubule Is Involved in the Inflammatory Heat Hyperalgesia in Rat Dorsal Root Ganglion Neurons. Int J Mol Sci 2021; 22:ijms221910360. [PMID: 34638704 PMCID: PMC8508904 DOI: 10.3390/ijms221910360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/13/2021] [Accepted: 09/21/2021] [Indexed: 11/16/2022] Open
Abstract
The microtubule, a major constituent of cytoskeletons, was shown to bind and interact with transient receptor potential vanilloid subfamily member 1 (TRPV1), and serves a pivotal role to produce thermal hyperalgesia in inflammatory pain. Nogo-A is a modulator of microtubule assembly and plays a key role in maintaining the function of TRPV1 in inflammatory heat pain. However, whether the microtubule dynamics modulated by Nogo-A in dorsal root ganglion (DRG) neurons participate in the inflammatory pain is not elucidated. Here we reported that the polymerization of microtubules in the DRG neurons, as indicated by the acetylated α-tubulin, tubulin polymerization-promoting protein 3 (TPPP3), and microtubule numbers, was significantly elevated in the complete Freund’s adjuvant (CFA) induced inflammatory pain. Consistent with our previous results, knock-out (KO) of Nogo-A protein significantly attenuated the heat hyperalgesia 72 h after CFA injection and decreased the microtubule polymerization via up-regulation of phosphorylation of collapsin response mediator protein 2 (CRMP2) in DRG. The colocalization of acetylated α-tubulin and TRPV1 in DRG neurons was also reduced dramatically in Nogo-A KO rats under inflammatory pain. Moreover, the down-regulation of TRPV1 in DRG of Nogo-A KO rats after injection of CFA was reversed by intrathecal injection of paclitaxel, a microtubule stabilizer. Furthermore, intrathecal injection of nocodazole (a microtubule disruptor) attenuated significantly the CFA-induced inflammatory heat hyperalgesia and the mechanical pain in a rat model of spared nerve injury (SNI). In these SNI cases, the Nogo-A and acetylated α-tubulin in DRG were also significantly up-regulated. We conclude that the polymerization of microtubules promoted by Nogo-A in DRG contributes to the development of inflammatory heat hyperalgesia mediated by TRPV1.
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Affiliation(s)
- Ling Chen
- Department of Human Anatomy, Histology & Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China; (L.C.); (Q.H.); (H.L.); (Y.Z.)
| | - Qiguo Hu
- Department of Human Anatomy, Histology & Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China; (L.C.); (Q.H.); (H.L.); (Y.Z.)
| | - Huaicun Liu
- Department of Human Anatomy, Histology & Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China; (L.C.); (Q.H.); (H.L.); (Y.Z.)
| | - Yan Zhao
- Department of Human Anatomy, Histology & Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China; (L.C.); (Q.H.); (H.L.); (Y.Z.)
| | - Sun-On Chan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
- Correspondence: (S.-O.C.); (J.W.); Tel.: +85-2-3943-6898 (S.-O.C.); +86-10-8280-1119 (J.W.)
| | - Jun Wang
- Department of Human Anatomy, Histology & Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China; (L.C.); (Q.H.); (H.L.); (Y.Z.)
- Correspondence: (S.-O.C.); (J.W.); Tel.: +85-2-3943-6898 (S.-O.C.); +86-10-8280-1119 (J.W.)
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Talhada D, Marklund N, Wieloch T, Kuric E, Ruscher K. Plasticity-Enhancing Effects of Levodopa Treatment after Stroke. Int J Mol Sci 2021; 22:10226. [PMID: 34638567 PMCID: PMC8508853 DOI: 10.3390/ijms221910226] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 09/10/2021] [Accepted: 09/21/2021] [Indexed: 11/21/2022] Open
Abstract
Dopaminergic treatment in combination with rehabilitative training enhances long-term recovery after stroke. However, the underlying mechanisms on structural plasticity are unknown. Here, we show an increased dopaminergic innervation of the ischemic territory during the first week after stroke induced in Wistar rats subjected to transient occlusion of the middle cerebral artery (tMCAO) for 120 min. This response was also found in rats subjected to permanent focal ischemia induced by photothrombosis (PT) and mice subjected to PT or tMCAO. Dopaminergic branches were detected in the infarct core of mice and rats in both stroke models. In addition, the Nogo A pathway was significantly downregulated in rats treated with levodopa (LD) compared to vehicle-treated animals subjected to tMCAO. Specifically, the number of Nogo A positive oligodendrocytes as well as the levels of Nogo A and the Nogo A receptor were significantly downregulated in the peri-infarct area of LD-treated animals, while the number of Oligodendrocyte transcription factor 2 positive cells increased in this region after treatment. In addition, we observed lower protein levels of Growth Associated Protein 43 in the peri-infarct area compared to sham-operated animals without treatment effect. The results provide the first evidence of the plasticity-promoting actions of dopaminergic treatment following stroke.
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Affiliation(s)
- Daniela Talhada
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Lund University, S-22184 Lund, Sweden; (D.T.); (T.W.); (E.K.)
| | - Niklas Marklund
- LUBIN Lab—Lunds Laboratorium för Neurokirurgisk Hjärnskadeforskning, Division of Neurosurgery, Department of Clinical Sciences, Lund University, S-22184 Lund, Sweden;
| | - Tadeusz Wieloch
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Lund University, S-22184 Lund, Sweden; (D.T.); (T.W.); (E.K.)
| | - Enida Kuric
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Lund University, S-22184 Lund, Sweden; (D.T.); (T.W.); (E.K.)
| | - Karsten Ruscher
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Lund University, S-22184 Lund, Sweden; (D.T.); (T.W.); (E.K.)
- LUBIN Lab—Lunds Laboratorium för Neurokirurgisk Hjärnskadeforskning, Division of Neurosurgery, Department of Clinical Sciences, Lund University, S-22184 Lund, Sweden;
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Han D, Yang P, Qin B, Ji G, Wu Y, Yu L, Zhang H. Upregulation of Nogo-B by hypoxia inducible factor-1 and activator protein-1 in hepatocellular carcinoma. Cancer Sci 2021; 112:2728-2738. [PMID: 33963651 PMCID: PMC8253276 DOI: 10.1111/cas.14941] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 04/26/2021] [Accepted: 04/30/2021] [Indexed: 12/13/2022] Open
Abstract
Nogo-B is an important regulator of tumor angiogenesis. Expression of Nogo-B is remarkably upregulated in multiple tumor types, especially hepatocellular carcinoma (HCC). Here, we show the transcriptional regulation mechanisms of Nogo-B in liver cancer. In response to hypoxia, expression of Nogo-B significantly increased in HCC tissues and cells. The distal hypoxia-responsive element in the promoter was essential for transcriptional activation of Nogo-B under hypoxic conditions, which is the specific site for hypoxia inducible factor-1α (HIF-1α) binding. In addition, Nogo-B expression was associated with c-Fos expression in HCC tissues. Nogo-B expression was induced by c-Fos, yet inhibited by a dominant negative mutant A-Fos. Deletion and mutation analysis of the predicted activator protein-1 binding sites revealed that functional element mediated the induction of Nogo-B promoter activity, which was confirmed by ChIP. These results indicate that HIF-1α and c-Fos induce the expression of Nogo-B depending on tumor microenvironments, such as hypoxia and low levels of nutrients, and play a role in upregulation of Nogo-B in tumor angiogenesis.
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Affiliation(s)
- Dingding Han
- Department of Clinical LaboratoryShanghai Children’s HospitalShanghai Jiaotong UniversityShanghaiChina
- State Key Laboratory of Genetic EngineeringInstitute of GeneticsSchool of Life SciencesFudan UniversityShanghaiChina
| | - Penggao Yang
- Department of Plastic and Reconstruction SurgeryShanghai Ninth People’s HospitalSchool of MedicineShanghai Jiaotong UniversityShanghaiChina
| | - Bo Qin
- State Key Laboratory of Genetic EngineeringInstitute of GeneticsSchool of Life SciencesFudan UniversityShanghaiChina
| | - Guoqing Ji
- State Key Laboratory of Genetic EngineeringInstitute of GeneticsSchool of Life SciencesFudan UniversityShanghaiChina
| | - Yanhua Wu
- State Key Laboratory of Genetic EngineeringInstitute of GeneticsSchool of Life SciencesFudan UniversityShanghaiChina
| | - Long Yu
- State Key Laboratory of Genetic EngineeringInstitute of GeneticsSchool of Life SciencesFudan UniversityShanghaiChina
| | - Hong Zhang
- Department of Clinical LaboratoryShanghai Children’s HospitalShanghai Jiaotong UniversityShanghaiChina
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17
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Zhou D, Cen K, Liu W, Liu F, Liu R, Sun Y, Zhao Y, Chang J, Zhu L. Xuesaitong exerts long-term neuroprotection for stroke recovery by inhibiting the ROCKII pathway, in vitro and in vivo. J Ethnopharmacol 2021; 272:113943. [PMID: 33617967 DOI: 10.1016/j.jep.2021.113943] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 01/17/2021] [Accepted: 02/16/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Xuesaitong (XST) is a traditional Chinese medicine injection with neuroprotective properties and has been extensively used to treat stroke for many years. The main component of XST is Panax notoginseng saponins (PNS), which is the main extract of the Chinese herbal medicine Panax notoginseng. AIM OF THE STUDY In this study, we investigated whether XST provided long-term neuroprotection by inhibiting neurite outgrowth inhibitor-A (Nogo-A) and the ROCKII pathway in experimental rats after middle cerebral artery occlusion (MCAO) and in SH-SY5Y cells exposed to oxygen-glucose deprivation/reperfusion (OGD/R). MATERIALS AND METHODS Rats with permanent MCAO were administered XST, Y27632, XST plus Y27632, and nimodipine for 14 and 28 days. Successful MCAO onset was confirmed by 2,3,5-triphenyl tetrazolium chloride (TTC) staining. Neurological deficit score (NDS) was used to assess neurological impairment. Hematoxylin-eosin (HE) staining and immunohistochemical (IHC) analysis of synaptophysin (SYN) and postsynaptic density protein-95 (PSD-95) were performed to evaluate cerebral ischemic injury and the neuroprotective capability of XST. Nogo-A levels and the ROCKII pathway were detected by IHC analysis, western blotting, and quantitative real-time polymerase chain reaction (qRT-PCR) to explore the protective mechanism of XST. OGD/R model was established in SH-SY5Y cells. Cell counting kit 8 (CCK8) was applied to detect the optimum OGD time and XST concentration. The expression levels Nogo-A and ROCKII pathway were determined using western blotting. RESULTS Our results showed that XST reduced neurological dysfunction and pathological damage, promoted weight gain and synaptic regeneration, reduced Nogo-A mRNA and protein levels, and inhibited the ROCKII pathway in MCAO rats. CCK8 assay displayed that the optimal OGD time and optimal XST concentration were 7 h and 20 μg/mL respectively in SH-SY5Y cells. XST could evidently inhibit OGD/R-induced Nogo-A protein expression and ROCKII pathway activation in SH-SY5Y cells. CONCLUSIONS The present study suggested that XST exerted long-term neuroprotective effects that assisted in stroke recovery, possibly through inhibition of the ROCKII pathway.
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Affiliation(s)
- Dongrui Zhou
- Key Laboratory of Chinese Internal Medicine of Educational Ministry and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, 100700, Beijing, China.
| | - Kai Cen
- Department of Stomatology, Dongzhimen Hospital, Beijing University of Chinese Medicine, 100700, Beijing, China.
| | - Wei Liu
- Department of Rehabilitation, Beijing Children's Hospital, Capital Medical University, 100045, Beijing, China.
| | - Fengzhi Liu
- Key Laboratory of Chinese Internal Medicine of Educational Ministry and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, 100700, Beijing, China.
| | - Ruijia Liu
- Key Laboratory of Chinese Internal Medicine of Educational Ministry and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, 100700, Beijing, China.
| | - Yikun Sun
- Key Laboratory of Chinese Internal Medicine of Educational Ministry and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, 100700, Beijing, China.
| | - Yizhou Zhao
- Key Laboratory of Chinese Internal Medicine of Educational Ministry and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, 100700, Beijing, China.
| | - Jingling Chang
- Department of Neurology, Dongzhimen Hospital, Beijing University of Chinese Medicine, 100700, Beijing, China.
| | - Lingqun Zhu
- Key Laboratory of Chinese Internal Medicine of Educational Ministry and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, 100700, Beijing, China; Department of Neurology, Dongzhimen Hospital, Beijing University of Chinese Medicine, 100700, Beijing, China.
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18
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Behling F, Barrantes-Freer A, Behnes CL, Stockhammer F, Rohde V, Adel-Horowski A, Rodríguez-Villagra OA, Barboza MA, Brück W, Lehmann U, Stadelmann C, Hartmann C. Expression of Olig2, Nestin, NogoA and AQP4 have no impact on overall survival in IDH-wildtype glioblastoma. PLoS One 2020; 15:e0229274. [PMID: 32160197 PMCID: PMC7065747 DOI: 10.1371/journal.pone.0229274] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 02/03/2020] [Indexed: 11/29/2022] Open
Abstract
Despite many years of research efforts and clinical trials the prognosis of patients diagnosed with glioblastoma remains very poor. The oligodendrocyte transcription factor 2 (Olig2) was identified as a marker for glioma stem cells, which are believed to be responsible for glioma recurrence and therapy resistance. In this retrospective analysis we assessed the prognostic value of oligodendroglial and glioma stem cell markers in 113 IDH-wildtype glioblastomas. Immunohistochemical staining for Olig2, NogoA, AQP4 and Nestin was performed in combination with sequencing of IDH1 and IDH2 as well as promotor methylation analysis of the MGMT gene. Even though differences in overall survival according to Olig2 expression were observed, univariate and multivariate survival analysis did not reveal a firm significant prognostic impact of Olig2, NogoA, AQP4 or Nestin expression. Additionally, no differences in the expression of these markers depending on clinical status, age or gender were found. The established independent prognostic factors age<65, Karnofsky Performance Status> = 70 and methylated MGMT gene promoter were significant in the multivariate analysis. In conclusion expression of oligodendroglial and glioma stem cell markers do not have an independent prognostic effect in IDH-wildtype glioblastoma.
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Affiliation(s)
- Felix Behling
- Institute of Neuropathology, University Medical Center Goettingen, Goettingen, Germany
- Department of Neurosurgery, University Hospital Tuebingen, Tuebingen, Germany
- Center for CNS Tumors, Comprehensive Cancer Center Tuebingen-Stuttgart, University Hospital Tuebingen, Tuebingen, Germany
| | - Alonso Barrantes-Freer
- Institute of Neuropathology, University Medical Center Goettingen, Goettingen, Germany
- Department of Neuropathology, Leipzig University Medicine, Leipzig, Germany
| | - Carl Ludwig Behnes
- Institute of Pathology, University Medical Center Goettingen, Goettingen, Germany
| | - Florian Stockhammer
- Department of Neurosurgery, University Medical Center Goettingen, Goettingen, Germany
| | - Veit Rohde
- Department of Neurosurgery, University Medical Center Goettingen, Goettingen, Germany
| | - Antonia Adel-Horowski
- Department of Neurosurgery, University Medical Center Goettingen, Goettingen, Germany
| | - Odir Antonio Rodríguez-Villagra
- Neuroscience Research Center, University of Costa Rica, San José, Costa Rica
- Institute for Psychological Research, University of Costa Rica, San José, Costa Rica
| | - Miguel Angel Barboza
- Neurosciences Department, Hospital Dr. Rafael A. Calderón Guardia, CCSS, University of Costa Rica, San José, Costa Rica
| | - Wolfgang Brück
- Institute of Neuropathology, University Medical Center Goettingen, Goettingen, Germany
| | - Ulrich Lehmann
- Institute of Pathology, Hannover Medical School, Hannover, Germany
| | - Christine Stadelmann
- Institute of Neuropathology, University Medical Center Goettingen, Goettingen, Germany
| | - Christian Hartmann
- Department of Neuropathology, Institute of Pathology, Hannover Medical School, Hannover, Germany
- * E-mail:
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19
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Yang F, Yang S, Liu J, Pang X, Shi F, Qin H, Wang J, Tang R. Impact of RTN4 gene polymorphism and its plasma level on susceptibility to nasopharyngeal carcinoma: A case-control study. Medicine (Baltimore) 2019; 98:e17831. [PMID: 31764777 PMCID: PMC6882562 DOI: 10.1097/md.0000000000017831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The RTN4 gene plays a role in the development and progression of cancer. This case-control study aimed to investigate the association between the RTN4 gene polymorphism and its plasma level with the risk of nasopharyngeal carcinoma (NPC) in a Chinese population.RTN4 gene polymorphisms (rs2920891, rs17046583, rs117465650, rs10496040, and rs2588519) in 220 patients with NPC and 300 healthy controls were analyzed using Snapshot single-nucleotide polymorphism genotyping assays. The plasma level of RTN4 was measured using the enzyme-linked immunosorbent assay.The allele frequencies of RTN4 gene polymorphisms showed no significant difference between the patients and controls (P > .05). Nevertheless, the rs2920891 polymorphism in a dominant model (A/C+C/C) and codominant model (A/C) was significantly associated with the susceptibility to NPC (P = .017, odds ratio [OR] = 1.54, 95% confidence interval [CI] = 1.08-2.21 and P = .034, OR = 1.64, 95% CI = 1.13-2.38, respectively). The plasma level of RTN4 was significantly higher in patients with NPC in comparison with the controls (P < .001). Furthermore, we observed that patients with NPC carrying the rs2920891 A/C+C/C genotype had a higher RTN4 level than those carrying the A/A genotype (P < .001).Our findings indicated that the rs2920891 polymorphism may be associated with increased susceptibility to NPC, possibly by increasing plasma RTN4.
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Affiliation(s)
- Fenglian Yang
- Youjiang Medical University for Nationalities, Baise
| | | | - Jin Liu
- Department of Otorhinolaryngology
| | | | - Feng Shi
- Department of Reproductive Medicine
| | | | | | - Renguang Tang
- Department of Blood Transfusion, Youjiang Medical University for Nationalities Affiliated Hospital, Baise, China
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20
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Hernandez-Diaz I, Pan J, Ricciardi CA, Bai X, Ke J, White KE, Flaquer M, Fouli GE, Argunhan F, Hayward AE, Hou FF, Mann GE, Miao RQ, Long DA, Gnudi L. Overexpression of Circulating Soluble Nogo-B Improves Diabetic Kidney Disease by Protecting the Vasculature. Diabetes 2019; 68:1841-1852. [PMID: 31217174 PMCID: PMC6706276 DOI: 10.2337/db19-0157] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 06/10/2019] [Indexed: 12/12/2022]
Abstract
Damage to the vasculature is the primary mechanism driving chronic diabetic microvascular complications such as diabetic nephropathy, which manifests as albuminuria. Therefore, treatments that protect the diabetic vasculature have significant therapeutic potential. Soluble neurite outgrowth inhibitor-B (sNogo-B) is a circulating N-terminus isoform of full-length Nogo-B, which plays a key role in vascular remodeling following injury. However, there is currently no information on the role of sNogo-B in the context of diabetic nephropathy. We demonstrate that overexpression of sNogo-B in the circulation ameliorates diabetic kidney disease by reducing albuminuria, hyperfiltration, and abnormal angiogenesis and protecting glomerular capillary structure. Systemic sNogo-B overexpression in diabetic mice also associates with dampening vascular endothelial growth factor-A signaling and reducing endothelial nitric oxide synthase, AKT, and GSK3β phosphorylation. Furthermore, sNogo-B prevented the impairment of tube formation, which occurred when human endothelial cells were exposed to sera from patients with diabetic kidney disease. Collectively, these studies provide the first evidence that sNogo-B protects the vasculature in diabetes and may represent a novel therapeutic target for diabetic vascular complications.
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Affiliation(s)
- Ivan Hernandez-Diaz
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, King's College London, London, U.K
| | - Jiaqi Pan
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, King's College London, London, U.K
| | - Carlo Alberto Ricciardi
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, King's College London, London, U.K
| | - Xiaoyan Bai
- Division of Nephrology, State Key Laboratory of Organ Failure Research, National Clinical Research Center for Kidney Disease, Guangdong Provincial Institute of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Jianting Ke
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, King's College London, London, U.K
| | - Kathryn E White
- Electron Microscopy Unit, Newcastle University, Newcastle upon Tyne, U.K
| | - Maria Flaquer
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, King's College London, London, U.K
| | - Georgia E Fouli
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, King's College London, London, U.K
| | - Fulye Argunhan
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, King's College London, London, U.K
| | - Anthea E Hayward
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, King's College London, London, U.K
| | - Fan Fan Hou
- Division of Nephrology, State Key Laboratory of Organ Failure Research, National Clinical Research Center for Kidney Disease, Guangdong Provincial Institute of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Giovanni E Mann
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, King's College London, London, U.K
| | | | - David A Long
- Developmental Biology and Cancer Programme, Great Ormond Street Institute of Child Health, University College London, London, U.K
| | - Luigi Gnudi
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre of Research Excellence, King's College London, London, U.K.
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21
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Lin CY, Zhang PH, Chen YJ, Wu CL, Tsai HJ. Conditional Overexpression of rtn4al in Muscle of Adult Zebrafish Displays Defects Similar to Human Amyotrophic Lateral Sclerosis. Mar Biotechnol (NY) 2019; 21:52-64. [PMID: 30443836 DOI: 10.1007/s10126-018-9857-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 10/21/2018] [Indexed: 06/09/2023]
Abstract
The protein level of muscle-specific human NogoA is abnormally upregulated in amyotrophic lateral sclerosis (ALS) mice and patients. On the other hand, while the presence of miR-206 in muscle cells delays onset and death in ALS, the relationship between these two phenomena remains unclear. Mammalian NogoA protein, also known as Reticulon 4a (Rtn4a), plays an important role in inhibiting the outgrowth of motor neurons. Our group previously identified zebrafish rtn4al as the target gene of miR-206 and found that knockdown of miR-206 increases rtn4al mRNA and Rtn4al protein in zebrafish embryos. It can be concluded from these results that neurite outgrowth of motor neurons is inhibited by Rtn4a1, which is entirely consistent with overexpression of either human NogoA or zebrafish homolog Rtn4al. Since an animal model able to express NogoA/rtn4al at the mature stage is unavailable, we generated a zebrafish transgenic line, Tg(Zα:TetON-Rtn4al), which conditionally and specifically overexpresses Rtn4al in the muscle tissue. After doxycycline induction, adult zebrafish displayed denervation at neuromuscular junction during the first week, then muscle disintegration and split myofibers during the third week, and, finally, significant weight loss in the sixth week. These results suggest that this zebrafish transgenic line, representing the inducible overexpression of Rtn4a1 in muscle, may provide an alternative animal model with which to study ALS because it exhibits ALS-like phenotype.
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Affiliation(s)
- Cheng-Yung Lin
- Institute of Biomedical Sciences, Mackay Medical College, No. 46, Sec. 3, Zhongzhen Road, Sanzhi Dist., New Taipei City, 252, Taiwan
| | - Po-Hsiang Zhang
- Institute of Biomedical Sciences, Mackay Medical College, No. 46, Sec. 3, Zhongzhen Road, Sanzhi Dist., New Taipei City, 252, Taiwan
| | - You-Jei Chen
- Institute of Molecular and Cellular Biology, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 106, Taiwan
| | - Chia-Lun Wu
- Institute of Molecular and Cellular Biology, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 106, Taiwan
| | - Huai-Jen Tsai
- Institute of Biomedical Sciences, Mackay Medical College, No. 46, Sec. 3, Zhongzhen Road, Sanzhi Dist., New Taipei City, 252, Taiwan.
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22
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Meves JM, Geoffroy CG, Kim ND, Kim JJ, Zheng B. Oligodendrocytic but not neuronal Nogo restricts corticospinal axon sprouting after CNS injury. Exp Neurol 2018; 309:32-43. [PMID: 30055160 PMCID: PMC6139267 DOI: 10.1016/j.expneurol.2018.07.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/24/2018] [Accepted: 07/24/2018] [Indexed: 12/20/2022]
Abstract
Recovery from injury to the central nervous system (CNS) is limited in the mammalian adult. Nonetheless, some degree of spontaneous recovery occurs after partial CNS injury. Compensatory axonal growth from uninjured neurons, termed sprouting, contributes to this naturally occurring recovery process and can be modulated by molecular intervention. Extensive studies have depicted a long-held hypothesis that oligodendrocyte-derived Nogo restricts axonal sprouting and functional recovery after CNS injury. However, cell type-specific function of Nogo in compensatory sprouting, spinal axon repair or functional recovery after CNS injury has not been reported. Here we present data showing that inducible, cell type-specific deletion of Nogo from oligodendrocytes led to a ~50% increase in the compensatory sprouting of corticospinal tract (CST) axons in the cervical spinal cord after unilateral pyramidotomy in mice. In contrast to a previously proposed growth-promoting role of neuronal Nogo in the optic nerve, deleting neuronal Nogo did not significantly affect CST axon sprouting in the spinal cord. Sprouting axons were associated with the expression of synaptic marker VGLUT1 in both the oligodendrocytic Nogo deletion and control mice. However, we did not detect any functional improvement in fine motor control associated with the increased sprouting in oligodendrocytic Nogo deletion mice. These data show for the first time with genetic evidence that Nogo specifically expressed by oligodendrocytes restricts compensatory sprouting after CNS injury, supporting a longstanding but heretofore untested hypothesis. While implicating a focus on sprouting as a repair mechanism in the translational potential of targeting the myelin inhibitory pathway, our study illustrates the challenge to harness enhanced structural plasticity for functional improvement.
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Affiliation(s)
- Jessica M Meves
- Neurosciences Graduate Program, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Department of Neurosciences, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Cédric G Geoffroy
- Department of Neurosciences, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Noah D Kim
- Department of Neurosciences, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Joseph J Kim
- Department of Neurosciences, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Binhai Zheng
- Neurosciences Graduate Program, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Department of Neurosciences, School of Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
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23
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Berry S, Weinmann O, Fritz AK, Rust R, Wolfer D, Schwab ME, Gerber U, Ster J. Loss of Nogo-A, encoded by the schizophrenia risk gene Rtn4, reduces mGlu3 expression and causes hyperexcitability in hippocampal CA3 circuits. PLoS One 2018; 13:e0200896. [PMID: 30040841 PMCID: PMC6057643 DOI: 10.1371/journal.pone.0200896] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 07/04/2018] [Indexed: 11/19/2022] Open
Abstract
Recent investigations of Nogo-A, a well characterized protein inhibitor of neurite outgrowth in the brain, have revealed additional functions including a role in neuropsychiatric disorders such as schizophrenia. Here we examined Nogo-A functions in mouse CA3 hippocampal circuitry. Patch clamp recordings showed that the absence of Nogo-A results in a hyperactive network. In addition, mGlu3 metabotropic glutamate receptors, which exhibit mutations in certain forms of schizophrenia, were downregulated specifically in the CA3 area. Furthermore, Nogo-A-/- mice showed disordered theta oscillations with decreased incidence and frequency, similar to those observed in mGlu3-/- mice. As disruptions in theta rhythmicity are associated with impaired spatial navigation, we tested mice using modified Morris water maze tasks. Mice lacking Nogo-A exhibited altered search strategies, displaying greater dependence on global as opposed to local reference frames. This link between Nogo-A and mGlu3 receptors may provide new insights into mechanisms underlying schizophrenia.
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Affiliation(s)
- Stewart Berry
- Brain Research Institute, University of Zurich, Zurich, Switzerland
| | - Oliver Weinmann
- Brain Research Institute, University of Zurich, Zurich, Switzerland
| | | | - Ruslan Rust
- Brain Research Institute, University of Zurich, Zurich, Switzerland
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - David Wolfer
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Martin E. Schwab
- Brain Research Institute, University of Zurich, Zurich, Switzerland
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Urs Gerber
- Brain Research Institute, University of Zurich, Zurich, Switzerland
| | - Jeanne Ster
- Brain Research Institute, University of Zurich, Zurich, Switzerland
- * E-mail:
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24
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Wang Y, Sun JC, Wang HB, Xu XM, Yang Y, Kong QJ, Shi JG. Effects of MicroRNA-494 on Astrocyte Proliferation and Synaptic Remodeling in the Spinal Cord of a Rat Model of Chronic Compressive Spinal Cord Injury by Regulating the Nogo/Ngr Signaling Pathway. Cell Physiol Biochem 2018; 48:919-933. [PMID: 30036869 DOI: 10.1159/000491959] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 05/20/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Chronic compression of the spinal cord causes the loss of motor neurons in the anterior horn, but the precise and extensive mechanism for the loss is not completely determined. Therefore, this study aims to explore the role of microRNA-494 (miR-494) in the proliferation of astrocytes and in the synaptic remodeling in the spinal cord of a rat model of chronic spinal cord injury (SCI) by regulating the Nogo/NgR signaling pathway. METHODS A rat model of chronic, compressive SCI was established, and the spinal cord state, blood supply changes, and astrocyte apoptosis were observed. Reverse transcription quantitative polymerase chain reaction (RT-qPCR) and Western blotting were used to detect expression of miR-494 and the Nogo/NgR signaling pathway-related genes. Fluorescence in situ hybridization (FISH) was used for detecting miR-494 expression and distribution. RESULTS Higher miR-494 expression was accompanied by the inhibition of astrocyte proliferation and synaptic remodeling. In addition, CDK6 could be regulated by miR-494 and was shown to be one of the target genes of miR-494. Positive expression of miR-494 detected by FISH was consistent with the results from RT-qPCR that miR-494 could downregulate CDK6 gene expression. Moreover, the direct miR-494 target CDK6 plays important inhibitory roles in chronic SCI by suppressing the Nogo/ NgR signaling pathway. CONCLUSIONS The results demonstrated that miR-494 inhibition can promote astrocyte proliferation and synaptic remodeling by suppressing the Nogo/NgR signaling pathway in a rat model of chronic SCI.
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25
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Takase H, Kurihara Y, Yokoyama TA, Kawahara N, Takei K. LOTUS overexpression accelerates neuronal plasticity after focal brain ischemia in mice. PLoS One 2017; 12:e0184258. [PMID: 28880879 PMCID: PMC5589167 DOI: 10.1371/journal.pone.0184258] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 08/20/2017] [Indexed: 01/13/2023] Open
Abstract
Nogo receptor-1 (NgR1) and its ligands inhibit neuronal plasticity and limit functional recovery after brain damage such as ischemic stroke. We have previously shown that lateral olfactory tract usher substance (LOTUS) antagonizes NgR1-mediated signaling. Here, we investigated whether LOTUS enhances neuronal plasticity and functional recovery after brain focal ischemia in adult mice. Focal ischemic infarcts were induced in wild-type and LOTUS-overexpressing transgenic mice via middle cerebral artery occlusion. Endogenous LOTUS expression was increased in brain and cervical spinal cord of the contralateral side of ischemia in the chronic phase after brain ischemia. LOTUS overexpression accelerated midline-crossing axonal sprouting from the contralateral side to the ipsilateral side of ischemia in the medullar reticular formation and gray matter of denervated cervical spinal cord. Importantly, LOTUS overexpression improved neurological score highly correlated with laterality ratio of corticoreticular fibers of the medulla oblongata, indicating that LOTUS overexpression may overcome the inhibitory environment induced by NgR1 signaling for damaged motor pathway reconstruction after ischemic stroke. Thus, our data suggest that LOTUS overexpression accelerates neuronal plasticity in the brainstem and cervical spinal cord after stroke and LOTUS administration is useful for future therapeutic strategies.
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Affiliation(s)
- Hajime Takase
- Department of Neurosurgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan
- Molecular Medical Bioscience Laboratory, Department of Medical Life Science, Yokohama City University Graduate School of Medical Life Science, Yokohama, Japan
| | - Yuji Kurihara
- Molecular Medical Bioscience Laboratory, Department of Medical Life Science, Yokohama City University Graduate School of Medical Life Science, Yokohama, Japan
| | - Taka-akira Yokoyama
- Department of Neurosurgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan
- Molecular Medical Bioscience Laboratory, Department of Medical Life Science, Yokohama City University Graduate School of Medical Life Science, Yokohama, Japan
| | - Nobutaka Kawahara
- Department of Neurosurgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan
- * E-mail: (KT); (NK)
| | - Kohtaro Takei
- Molecular Medical Bioscience Laboratory, Department of Medical Life Science, Yokohama City University Graduate School of Medical Life Science, Yokohama, Japan
- * E-mail: (KT); (NK)
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26
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Zhu B, Chen S, Hu X, Jin X, Le Y, Cao L, Yuan Z, Lin Z, Jiang S, Sun L, Yu L. Knockout of the Nogo-B Gene Attenuates Tumor Growth and Metastasis in Hepatocellular Carcinoma. Neoplasia 2017; 19:583-593. [PMID: 28628795 PMCID: PMC5476975 DOI: 10.1016/j.neo.2017.02.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 02/10/2017] [Accepted: 02/15/2017] [Indexed: 01/05/2023]
Abstract
Human hepatocellular carcinoma (HCC) is a malignant cancer. It is a challenge to develop anti-HCC drugs due to HCC's extreme aggressiveness and with the sensitivity of the liver to show severe adverse effects. More importantly, the precise mechanisms causing HCC pathogenicity are not known. Our previous study disclosed Nogo-B as a reticulon 4 (Rtn4) family member. In the present study, we first identified that Nogo-B played a critical role in HCC progression. We found, via in vitro and in vivo assays, that Nogo-B was expressed aberrantly in primary HCC tumor tissues and immortal HCC cells but was relatively scarce in the normal liver tissues or cells. Nogo-B knockout, via the CRISPR-Cas9 technique, resulted in significant suppression of HCC cell proliferation and tumor growth. Next-generation sequencing analysis showed that Nogo-B knockout have effects on interleukin-6 (IL-6) signaling pathway. Furthermore, we observed that IL-6 induced phosphorylation of STAT3 (pSTAT3) in wild-type HCC cells, but Nogo-B knockout could reduce IL-6-induced increase of pSTAT3, supporting that Nogo-B affects HCC tumor progression possibly via regulating the IL-6/STAT3 signaling pathway. In conclusion, Nogo-B is expressed aberrantly in HCCs and plays an oncogenic role. These findings support that Nogo-B may be a novel anti-HCC therapeutic target.
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Affiliation(s)
- Bo Zhu
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200433, China
| | - Shaobo Chen
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200433, China
| | - Xiaoding Hu
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200433, China
| | - Xiaofeng Jin
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200433, China
| | - Yichen Le
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200433, China
| | - Lihuan Cao
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200433, China
| | - Zhonghua Yuan
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Human, University of South China, Hengyang 421001, China
| | - Zhen Lin
- Department of pathology, School of Medicine, Tulane Health Sciences Center, New Orleans, LA 70112-2699, USA
| | - Songmin Jiang
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200433, China.
| | - Lichun Sun
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200433, China; Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy & Pharmacology, University of South China, Hengyang 421001, China; Department of Medicine, School of Medicine, Tulane Health Sciences Center, New Orleans, LA 70112-2699, USA.
| | - Long Yu
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, 2005 Songhu Road, Shanghai 200433, China.
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Zhu Y, Tong Q, Ye J, Ning Y, Xiong Y, Yang M, Xiao H, Lu J, Xu W, Li J, Li Q. Nogo-B Facilitates LPS-Mediated Immune Responses by Up-Regulation of TLR4-Signaling in Macrophage RAW264.7. Cell Physiol Biochem 2017; 41:274-285. [PMID: 28214833 DOI: 10.1159/000456094] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 11/30/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Nogo-B, a member of the reticulon family of proteins, is mainly located in the endoplasmic reticulum (ER). Here, we investigate the function and mechanism of Nogo-B in the regulation of TLR4-associated immune responses in the macrophage cell line of RAW264.7. METHODS Nogo-B was up- and down-regulated through the use of appropriate adenoviral vectors or siRNA, and the effects of Nogo-B on macrophages under liposaccharide (LPS) stimulation were evaluated via western blotting, immunofluorescence, enzyme-linked immunosorbent assay (ELISA), flow cytometric analysis, and transwell assay. RESULTS Our data indicates that the protein of Nogo-B was down-regulated in a time- and dose-dependent manner following LPS administration in the macrophage. Nogo-B overexpression increased the production of inflammatory cytokines (MCP-1, TNF-α, IL-1β, and TGF-β), enhanced macrophage migration activities, activated major histocompatibility complex II (MHC II), and elevated the expression of macrophage scavenger receptor 1(MSR1), all of which suggest that Nogo-B is necessary for immune responses and plays an important role in regulating macrophage recruitment. Mechanistically, Nogo-B may enhance TLR4 expression in macrophage surfaces, activate mitogen-activated protein kinase (MAPK) pathways, and initiate inflammatory responses. CONCLUSION These findings illustrate the key regulatory functions of Nogo-B in facilitating LPS-mediated immune responses through promoting the phosphorylation of MAP kinase.
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Theotokis P, Touloumi O, Lagoudaki R, Nousiopoulou E, Kesidou E, Siafis S, Tselios T, Lourbopoulos A, Karacostas D, Grigoriadis N, Simeonidou C. Nogo receptor complex expression dynamics in the inflammatory foci of central nervous system experimental autoimmune demyelination. J Neuroinflammation 2016; 13:265. [PMID: 27724971 PMCID: PMC5057208 DOI: 10.1186/s12974-016-0730-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 09/22/2016] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Nogo-A and its putative receptor NgR are considered to be among the inhibitors of axonal regeneration in the CNS. However, few studies so far have addressed the issue of local NgR complex multilateral localization within inflammation in an MS mouse model of autoimmune demyelination. METHODS Chronic experimental autoimmune encephalomyelitis (EAE) was induced in C57BL/6 mice. Analyses were performed on acute (days 18-22) and chronic (day 50) time points and compared to controls. The temporal and spatial expression of the Nogo receptor complex (NgR and coreceptors) was studied at the spinal cord using epifluorescent and confocal microscopy or real-time PCR. Data are expressed as cells/mm2, as mean % ± SEM, or as arbitrary units of integrated density. RESULTS Animals developed a moderate to severe EAE without mortality, followed by a progressive, chronic clinical course. NgR complex spatial expression varied during the main time points of EAE. NgR with coreceptors LINGO-1 and TROY was increased in the spinal cord in the acute phase whereas LINGO-1 and p75 signal seemed to be dominant in the chronic phase, respectively. NgR was detected on gray matter NeuN+ neurons of the spinal cord, within the white matter inflammatory foci (14.2 ± 4.3 % NgR+ inflammatory cells), and found to be colocalized with GAP-43+ axonal growth cones while no β-TubIII+, SMI-32+, or APP+ axons were found as NgR+. Among the NgR+ inflammatory cells, 75.6 ± 9.0 % were microglial/macrophages (lectin+), 49.6 ± 14.2 % expressed CD68 (phagocytic ED1+ cells), and no cells were Mac-3+. Of these macrophages/monocytes, only Arginase-1+/NgR+ but not iNOS+/NgR+ were present in lesions both in acute and chronic phases. CONCLUSIONS Our data describe in detail the expression of the Nogo receptor complex within the autoimmune inflammatory foci and suggest a possible immune action for NgR apart from the established inhibitory one on axonal growth. Its expression by inflammatory macrophages/monocytes could signify a possible role of these cells on axonal guidance and clearance of the lesioned area during inflammatory demyelination.
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MESH Headings
- Animals
- Antigens, Differentiation/metabolism
- Arginase/metabolism
- Central Nervous System/metabolism
- Central Nervous System/pathology
- Disease Models, Animal
- Encephalomyelitis, Autoimmune, Experimental/chemically induced
- Encephalomyelitis, Autoimmune, Experimental/complications
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Female
- Freund's Adjuvant/immunology
- Freund's Adjuvant/toxicity
- Gene Expression Regulation/drug effects
- Gene Expression Regulation/immunology
- Mice
- Mice, Inbred C57BL
- Myelin-Oligodendrocyte Glycoprotein/immunology
- Myelin-Oligodendrocyte Glycoprotein/toxicity
- Nerve Tissue Proteins/metabolism
- Nogo Proteins/genetics
- Nogo Proteins/metabolism
- Nogo Receptors/genetics
- Nogo Receptors/metabolism
- Peptide Fragments/immunology
- Peptide Fragments/toxicity
- Receptors, Nerve Growth Factor/genetics
- Receptors, Nerve Growth Factor/metabolism
- Receptors, Tumor Necrosis Factor/genetics
- Receptors, Tumor Necrosis Factor/metabolism
- Signal Transduction/drug effects
- Signal Transduction/immunology
- Signal Transduction/physiology
- Statistics, Nonparametric
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Affiliation(s)
- Paschalis Theotokis
- B’ Department of Neurology, Laboratory of Experimental Neurology and Neuroimmunology, AHEPA University Hospital, Aristotle University of Thessaloniki, Stilponos Kiriakides str. 1, 546 36 Thessaloniki, Central Macedonia Greece
| | - Olga Touloumi
- B’ Department of Neurology, Laboratory of Experimental Neurology and Neuroimmunology, AHEPA University Hospital, Aristotle University of Thessaloniki, Stilponos Kiriakides str. 1, 546 36 Thessaloniki, Central Macedonia Greece
| | - Roza Lagoudaki
- B’ Department of Neurology, Laboratory of Experimental Neurology and Neuroimmunology, AHEPA University Hospital, Aristotle University of Thessaloniki, Stilponos Kiriakides str. 1, 546 36 Thessaloniki, Central Macedonia Greece
| | - Evangelia Nousiopoulou
- B’ Department of Neurology, Laboratory of Experimental Neurology and Neuroimmunology, AHEPA University Hospital, Aristotle University of Thessaloniki, Stilponos Kiriakides str. 1, 546 36 Thessaloniki, Central Macedonia Greece
| | - Evangelia Kesidou
- B’ Department of Neurology, Laboratory of Experimental Neurology and Neuroimmunology, AHEPA University Hospital, Aristotle University of Thessaloniki, Stilponos Kiriakides str. 1, 546 36 Thessaloniki, Central Macedonia Greece
| | - Spyridon Siafis
- B’ Department of Neurology, Laboratory of Experimental Neurology and Neuroimmunology, AHEPA University Hospital, Aristotle University of Thessaloniki, Stilponos Kiriakides str. 1, 546 36 Thessaloniki, Central Macedonia Greece
| | - Theodoros Tselios
- Department of Chemistry, University of Patras, Rion, 265 04 Patras, Greece
| | - Athanasios Lourbopoulos
- B’ Department of Neurology, Laboratory of Experimental Neurology and Neuroimmunology, AHEPA University Hospital, Aristotle University of Thessaloniki, Stilponos Kiriakides str. 1, 546 36 Thessaloniki, Central Macedonia Greece
- Institute for Stroke and Dementia Research (ISD), Feodor-Lynen-Strasse 17, 81377 Munich, Germany
| | - Dimitrios Karacostas
- B’ Department of Neurology, Laboratory of Experimental Neurology and Neuroimmunology, AHEPA University Hospital, Aristotle University of Thessaloniki, Stilponos Kiriakides str. 1, 546 36 Thessaloniki, Central Macedonia Greece
| | - Nikolaos Grigoriadis
- B’ Department of Neurology, Laboratory of Experimental Neurology and Neuroimmunology, AHEPA University Hospital, Aristotle University of Thessaloniki, Stilponos Kiriakides str. 1, 546 36 Thessaloniki, Central Macedonia Greece
| | - Constantina Simeonidou
- Department of Experimental Physiology, Faculty of Medicine, Aristotle University of Thessaloniki, 546 36 Thessaloniki, Central Macedonia Greece
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Zelenay V, Arzt ME, Bibow S, Schwab ME, Riek R. The Neurite Outgrowth Inhibitory Nogo-A-Δ20 Region Is an Intrinsically Disordered Segment Harbouring Three Stretches with Helical Propensity. PLoS One 2016; 11:e0161813. [PMID: 27611089 PMCID: PMC5017703 DOI: 10.1371/journal.pone.0161813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 08/13/2016] [Indexed: 01/12/2023] Open
Abstract
Functional recovery from central neurotrauma, such as spinal cord injury, is limited by myelin-associated inhibitory proteins. The most prominent example, Nogo-A, imposes an inhibitory cue for nerve fibre growth via two independent domains: Nogo-A-Δ20 (residues 544-725 of the rat Nogo-A sequence) and Nogo-66 (residues 1026-1091). Inhibitory signalling from these domains causes a collapse of the neuronal growth cone via individual receptor complexes, centred around sphingosine 1-phosphate receptor 2 (S1PR2) for Nogo-A-Δ20 and Nogo receptor 1 (NgR1) for Nogo-66. Whereas the helical conformation of Nogo-66 has been studied extensively, only little structural information is available for the Nogo-A-Δ20 region. We used nuclear magnetic resonance (NMR) spectroscopy to assess potential residual structural propensities of the intrinsically disordered Nogo-A-Δ20. Using triple resonance experiments, we were able to assign 94% of the non-proline backbone residues. While secondary structure analysis and relaxation measurements highlighted the intrinsically disordered character of Nogo-A-Δ20, three stretches comprising residues 561EAIQESL567, 639EAMNVALKALGT650, and 693SNYSEIAK700 form transient α-helical structures. Interestingly, 561EAIQESL567 is situated directly adjacent to one of the most conserved regions of Nogo-A-Δ20 that contains a binding motif for β1-integrin. Likewise, 639EAMNVALKALGT650 partially overlaps with the epitope recognized by 11C7, a Nogo-A-neutralizing antibody that promotes functional recovery from spinal cord injury. Diffusion measurements by pulse-field gradient NMR spectroscopy suggest concentration- and oxidation state-dependent dimerisation of Nogo-A-Δ20. Surprisingly, NMR and isothermal titration calorimetry (ITC) data could not validate previously shown binding of extracellular loops of S1PR2 to Nogo-A-Δ20.
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Affiliation(s)
- Viviane Zelenay
- Department of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - Michael E. Arzt
- Brain Research Institute, University of Zurich, Zurich, Switzerland
- Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Stefan Bibow
- Department of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - Martin E. Schwab
- Brain Research Institute, University of Zurich, Zurich, Switzerland
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Roland Riek
- Department of Physical Chemistry, ETH Zurich, Zurich, Switzerland
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Abstract
OBJECTIVE The primary focus of this study was to investigate the effects of local profound hypothermia and to explore the possible mechanism in adult rats with spinal cord injury. STUDY DESIGN AND METHODS Spinal cord injury models were established by placing aneurysm clips on T10. An epidural perfusion device was applied to maintain a steady temperature (18 °C) for 120 min with gradual rewarming to 37 °C Total hypothermic duration lasted up to about 170 min. The expression of axon regeneration inhibitors was tested by Western blot and real-time PCR. Luxol Fast Blue (LFB) stain and Bielschowsky silver stain were used to observe spinal cord morphology. Motor function of the hind limbs (BBB score) was monitored for 21 days. RESULTS The expressions of RhoA, ROCK-II, NG2, Neurocan, Brevican, and Nogo-A were downregulated by regional hypothermia (RH) after spinal cord injury. Subsequent observation showed that rats that had received RH had an alleviated demyelinating condition and a greater number of nerve fibers. Furthermore, the RH group achieved higher BBB scores than the spinal cord injury (SCI) group. CONCLUSIONS Recovery of hind limb function in rats can be promoted by local profound hypothermia; this may be caused by the suppression of axon regeneration inhibitors.
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Affiliation(s)
| | | | | | | | - Huilin Cheng
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, Jiangsu Province, China
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