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Gong Z, Zhang Y, Wang W, Li X, Wang K, You X, Wu J. Netrin-1 Role in Nociceptive Neuron Sprouting through Activation of DCC Signaling in a Rat Model of Bone Cancer Pain. J Integr Neurosci 2024; 23:47. [PMID: 38538215 DOI: 10.31083/j.jin2303047] [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: 08/24/2023] [Revised: 09/13/2023] [Accepted: 09/21/2023] [Indexed: 04/05/2024] Open
Abstract
BACKGROUND Bone cancer pain (BCP) is a common primary or metastatic bone cancer complication. Netrin-1 plays an essential role in neurite elongation and pain sensitization. This study aimed to determine the role of netrin-1 from the metastatic bone microenvironment in BCP development and identify the associated signaling pathway for the strategy of BCP management. METHODS The rat BCP model was established by intratibial implantation of Walker 256 cells. Von Frey filaments measured the mechanical pain threshold. Movement-induced pain was assessed using limb use scores. Expressions of associated molecules in the affected tibias or dorsal root ganglia (DRG) were measured by immunofluorescence, immunohistochemistry, real-time quantitative polymerase chain reaction, or western blotting. Transduction of deleted in colorectal cancer (DCC) signaling was inhibited by intrathecal injection of DCC-siRNA. RESULTS In BCP rats, the presence of calcitonin gene-related peptide (CGRP)-positive nerve fibers increased in the metastatic bone lesions. The metastatic site showed enrichment of well-differentiated osteoclasts and expressions of netrin-1 and its attractive receptor DCC. Upregulation of DCC and increased phosphorylation levels of focal adhesion kinase (FAK) and Rac family small GTPase 1/Cell division cycle 42 (Rac1/Cdc42) were found in the DRG. Intrathecal administration of DCC-siRNA led to a significant reduction in FAK and Rac1/Cdc42 phosphorylation levels in the DRG, decreased nociceptive nerve innervation, and improved pain behaviors. CONCLUSIONS Netrin-1 may contribute to the activation of the BCP by inducing nociceptive nerve innervation and improving pain behaviors.
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Affiliation(s)
- Zhihao Gong
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, School of Medicine, 200030 Shanghai, China
| | - Yuxin Zhang
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, School of Medicine, 200030 Shanghai, China
| | - Wei Wang
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, School of Medicine, 200030 Shanghai, China
| | - Xin Li
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, School of Medicine, 200030 Shanghai, China
- School of Medicine, Shanghai University, 200444 Shanghai, China
| | - Kai Wang
- Central Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University, School of Medicine, 200030 Shanghai, China
| | - Xingji You
- School of Medicine, Shanghai University, 200444 Shanghai, China
| | - Jingxiang Wu
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, School of Medicine, 200030 Shanghai, China
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Miao L, Qing SW, Tao L. Huntingtin-associated protein 1 ameliorates neurological function rehabilitation by facilitating neurite elongation through TrKA-MAPK pathway in mice spinal cord injury. Front Mol Neurosci 2023; 16:1214150. [PMID: 37609072 PMCID: PMC10442162 DOI: 10.3389/fnmol.2023.1214150] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 07/24/2023] [Indexed: 08/24/2023] Open
Abstract
Aims Huntingtin-associated protein 1 (HAP1) is a neuronal protein closely associated with microtubules and might facilitate neurological function rehabilitation. This study aimed to investigate the effects of HAP1 on SCI and the underlying mechanisms. Methods the spinal cord injury (SCI) mouse model was induced by Allen's method. Then recombinant-HAP1 (r-HAP1) was administrated by intrathecal injection, and the BMS, Thermal nociceptive thresholds, tactile nociceptive thresholds, and neurofibrillary regeneration were identified to inspect the therapy outcome. Then NSCs were isolated from mice on embryonic day 14.5 and induced to differentiate into neurons. The efficiency of axon growth was calculated. Signaling pathway array was conducted to examine the signaling pathways in NSCs treated with r-HAP1. Antagonists and activators of TrkA were used to confirm the role of TrkA of HAP1 intervention both in vitro and in vivo. Results r-HAP1 ameliorates the neurological function rehabilitation after SCI, and benefits the regain of Tuj in injury spinal cord. Also significantly enhances neurite growth during neuronal differentiation of NSCs; Signaling pathway array and Western blot revealed that r-HAP1 significantly activates the phosphorylation of TrkA-MAPK/ERK in NSCs. TrkA selective inhibitor GW441756 blocks r-HAP1 on TrkA-MAPK/ERK signaling pathway and detracts from axonal growth after neuronal differentiation. TrkA selective activator gambogic amide can mimic the function of r-HAP1 by activating the foregoing pathway. ERK activator U-46619 reverses the blocking effect of GW441756 on r-HAP1. Conclusion HAP1 activates the TrkA-MAPK signaling pathway and is conducive to neurite elongation during NSC neuronal differentiation; by which to improve the prognosis of spinal cord injury in mice.
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Affiliation(s)
- Li Miao
- Department of Orthopedics, Hunan Children's Hospital, Changsha, China
- The School of Pediatrics, Hengyang Medical School, University of South China, Changsha, China
- Key Laboratory of Pediatric Bone Science of Hunan Province, Changsha, China
| | - Sun Wan Qing
- Hunan Rehabilitation Hospital Third Internal Department, Changsha, China
| | - Lu Tao
- Department of Neurosurgery, Changde Hospital, Xiangya School of Medicine, Central South University, Changde, China
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Penna E, Niso M, Podlewska S, Volpicelli F, Crispino M, Perrone-Capano C, Bojarski AJ, Lacivita E, Leopoldo M. In Vitro and In Silico Analysis of the Residence Time of Serotonin 5-HT 7 Receptor Ligands with Arylpiperazine Structure: A Structure-Kinetics Relationship Study. ACS Chem Neurosci 2022; 13:497-509. [PMID: 35099177 DOI: 10.1021/acschemneuro.1c00710] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
During the last decade, the kinetics of drug-target interaction has received increasing attention as an important pharmacological parameter in the drug development process. Several studies have suggested that the lipophilicity of a molecule can play an important role. To date, this aspect has been studied for several G protein-coupled receptors (GPCRs) ligands but not for the 5-HT7 receptor (5-HT7R), a GPCR proposed as a valid therapeutic target in neurodevelopmental and neuropsychiatric disorders associated with abnormal neuronal connectivity. In this study, we report on structure-kinetics relationships of a set of arylpiperazine-based 5-HT7R ligands. We found that it is not the overall lipophilicity of the molecule that influences drug-target interaction kinetics but rather the position of polar groups within the molecule. Next, we performed a combination of molecular docking studies and molecular dynamics simulations to gain insights into structure-kinetics relationships. These studies did not suggest specific contact patterns between the ligands and the receptor-binding site as determinants for compounds kinetics. Finally, we compared the abilities of two 5-HT7R agonists with similar receptor-binding affinities and different residence times to stimulate the 5-HT7R-mediated neurite outgrowth in mouse neuronal primary cultures and found that the compounds induced the effect with different timing. This study provides the first insights into the binding kinetics of arylpiperazine-based 5-HT7R ligands that can be helpful to design new 5-HT7R ligands with fine-tuning of the kinetic profile.
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Affiliation(s)
- Eduardo Penna
- Department of Biology, University of Naples Federico II, via Cintia 26, 80126 Naples, Italy
- Biofordrug srl, via Dante 99, 70019 Triggiano (Bari), Italy
| | - Mauro Niso
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy
| | - Sabina Podlewska
- Maj Institute of Pharmacology, Polish Academy of Sciences, 12 Smętna Street, 31-343 Kraków, Poland
| | - Floriana Volpicelli
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, via Domenico Montesano 49, 80131 Naples, Italy
| | - Marianna Crispino
- Department of Biology, University of Naples Federico II, via Cintia 26, 80126 Naples, Italy
| | - Carla Perrone-Capano
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, via Domenico Montesano 49, 80131 Naples, Italy
- Institute of Genetics and Biophysics “Adriano Buzzati Traverso”, National Research Council (CNR), via Pietro Castellino 111, 80131 Naples, Italy
| | - Andrzej J. Bojarski
- Maj Institute of Pharmacology, Polish Academy of Sciences, 12 Smętna Street, 31-343 Kraków, Poland
| | - Enza Lacivita
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy
| | - Marcello Leopoldo
- Dipartimento di Farmacia-Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, via Orabona 4, 70125 Bari, Italy
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Seo J, Lanara C, Choi JY, Kim J, Cho H, Chang Y, Kang K, Stratakis E, Choi IS. Neuronal Migration on Silicon Microcone Arrays with Different Pitches. Adv Healthc Mater 2021; 10:e2000583. [PMID: 32815647 DOI: 10.1002/adhm.202000583] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/22/2020] [Indexed: 11/10/2022]
Abstract
Neuronal migration is a complicated but fundamental process for proper construction and functioning of neural circuits in the brain. Many in vivo studies have suggested the involvement of environmental physical features of a neuron in its migration, but little effort has been made for the in vitro demonstration of topography-driven neuronal migration. This work investigates migratory behaviors of primary hippocampal neurons on a silicon microcone (SiMC) array that presents 14 different pitch domains (pitch: 2.5-7.3 µm). Neuronal migration becomes the maximum at the pitch of around 3 µm, with an upper migration threshold of about 4 µm. Immunocytochemical studies indicate that the speed and direction of migration, as well as its probability of occurrence, are correlated with the morphology of the neuron, which is dictated by the pitch and shape of underlying SiMC structures. In addition to the effects on neuronal migration, the real-time imaging of migrating neurons on the topographical substrate reveals new in vitro modes of neuronal migration, which have not been observed on the conventional flat culture plate, but been suggested by in vivo studies.
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Affiliation(s)
- Jeongyeon Seo
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Christina Lanara
- Institute of Electronic Structure and Laser Foundation for Research and Technology Hellas (FORTH) Nikolaou Plastira 100 Heraklion Crete GR‐70013 Greece
| | - Ji Yu Choi
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Jungnam Kim
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Hyeoncheol Cho
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Young‐Tae Chang
- Department of Chemistry POSTECH Center for Self‐Assembly and Complexity Institute for Basic Science (IBS) Pohang 37673 Korea
| | - Kyungtae Kang
- Department of Applied Chemistry Kyung Hee University Yongin Gyeonggi 17104 Korea
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser Foundation for Research and Technology Hellas (FORTH) Nikolaou Plastira 100 Heraklion Crete GR‐70013 Greece
| | - Insung S. Choi
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
- Department of Bio and Brain Engineering KAIST Daejeon 34141 Korea
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Ardhani R, Ana ID, Tabata Y. Gelatin hydrogel membrane containing carbonate hydroxyapatite for nerve regeneration scaffold. J Biomed Mater Res A 2020; 108:2491-2503. [PMID: 32418269 DOI: 10.1002/jbm.a.37000] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/11/2020] [Accepted: 04/19/2020] [Indexed: 12/26/2022]
Abstract
A scaffold that mimics physicochemical structure of nerve and supplies calcium ions in axonal environment is an attractive alternative for nerve regeneration, especially when applied in critical nerve defect. Various scaffold material, design, including their combination with several growth-induced substances and cells application have been being investigated and used in the area of nerve tissue engineering. However, the development remains challenges today because they are still far from ideal concerning their stability, reproducibility, including complicated handling related to the poor mechanical strength. In view of the current basis, in this study, the introduction of carbonated hydroxyapatite (CHA) as promising candidate to increase mechanical properties of nerve scaffold is reported. The incorporation of CHA was not only expected to provide better mechanical properties of the scaffold. Under physiological condition, CHA is known to be the most stable phases of calcium phosphate compound. Therefore, CHA was expected to provide controlled release calcium for better axonal environment and promote fasten nerve regeneration. This study shows that CHA incorporated gelatin membrane has ideal microstructure to prevent fibrous tissue ingrowth into the injury site, while retaining its capability to survive nerve tissue by allowing adequate glucose and specific proteins diffusion. The provided Ca2+ release to the environment promoted neuronal growth, without suppressing acetylcholine esterase release activity. Neurite elongation was dramatically higher in the gelatin membrane incorporated with CHA. Introduction of CHA into gelatin membrane represents a new generation medical device for nerve reconstruction, with CHA was considered as a promising factor.
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Affiliation(s)
- Retno Ardhani
- Department of Dental Biomedical Sciences, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Ika Dewi Ana
- Department of Dental Biomedical Sciences, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Yasuhiko Tabata
- Laboratory of Biomaterials, Department of Regeneration Science and Engineering Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
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Barón-Mendoza I, González-Arenas A. Relationship between the effect of polyunsaturated fatty acids (PUFAs) on brain plasticity and the improvement on cognition and behavior in individuals with autism spectrum disorder. Nutr Neurosci 2020; 25:387-410. [PMID: 32338174 DOI: 10.1080/1028415x.2020.1755793] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Objective: This work aimed to compile information about the neuronal processes in which polyunsaturated fatty acids (PUFAs) could modulate brain plasticity, in order to analyze the role of nutritional intervention with the ω-3 and ω-6 fatty acids as a therapeutic strategy for the Autism Spectrum Disorder (ASD)-related signs and symptoms.Methods: We reviewed different articles reporting the effect of PUFAS on neurite elongation, membrane expansion, cytoskeleton rearrangement and neurotransmission, considering the ASD-related abnormalities in these processes.Results: In accordance to the reviewed studies, it is clear that ASD is one of the neurological conditions associated with an impairment in neuronal plasticity; therefore, PUFAs-rich diet improvements on cognition and behavioral deficits in individuals with autism, could be involved with the regulation of neuronal processes implicated in the atypical brain plasticity related with this neurodevelopmental disorder.Discussion: The behavioral and cognitive improvement observed in individuals with ASD after PUFAs treatment might underlie, at least in part, in the ability of ω-3 and ω-6 fatty acids to induce neurite outgrowth, probably, through the dynamic regulation of the neuronal cytoskeleton along with the expansion of neuronal membranes. Furthermore, it might also be associated with an enhancement of the efficacy of synaptic transmission and the modulation of neurotransmitters release.
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Affiliation(s)
- Isabel Barón-Mendoza
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, CDMX, México
| | - Aliesha González-Arenas
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad Universitaria, CDMX, México
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Quarta S, Camprubí-Robles M, Schweigreiter R, Matusica D, Haberberger RV, Proia RL, Bandtlow CE, Ferrer-Montiel A, Kress M. Sphingosine-1-Phosphate and the S1P 3 Receptor Initiate Neuronal Retraction via RhoA/ROCK Associated with CRMP2 Phosphorylation. Front Mol Neurosci 2017; 10:317. [PMID: 29066950 PMCID: PMC5641356 DOI: 10.3389/fnmol.2017.00317] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 09/19/2017] [Indexed: 01/17/2023] Open
Abstract
The bioactive lipid sphingosine-1-phosphate (S1P) is an important regulator in the nervous system. Here, we explored the role of S1P and its receptors in vitro and in preclinical models of peripheral nerve regeneration. Adult sensory neurons and motor neuron-like cells were exposed to S1P in an in vitro assay, and virtually all neurons responded with a rapid retraction of neurites and growth cone collapse which were associated with RhoA and ROCK activation. The S1P1 receptor agonist SEW2871 neither activated RhoA or neurite retraction, nor was S1P-induced neurite retraction mitigated in S1P1-deficient neurons. Depletion of S1P3 receptors however resulted in a dramatic inhibition of S1P-induced neurite retraction and was on the contrary associated with a significant elongation of neuronal processes in response to S1P. Opposing responses to S1P could be observed in the same neuron population, where S1P could activate S1P1 receptors to stimulate elongation or S1P3 receptors and retraction. S1P was, for the first time in sensory neurons, linked to the phosphorylation of collapsin response-mediated protein-2 (CRMP2), which was inhibited by ROCK inhibition. The improved sensory recovery after crush injury further supported the relevance of a critical role for S1P and receptors in fine-tuning axonal outgrowth in peripheral neurons.
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Affiliation(s)
- Serena Quarta
- Division of Physiology, DPMP, Innsbruck Medical University, Innsbruck, Austria
| | | | - Rüdiger Schweigreiter
- Division of Neurobiochemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Dusan Matusica
- Anatomy & Histology, Centre for Neuroscience, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Rainer V Haberberger
- Anatomy & Histology, Centre for Neuroscience, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Richard L Proia
- National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD, United States
| | - Christine E Bandtlow
- Division of Neurobiochemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | | | - Michaela Kress
- Division of Physiology, DPMP, Innsbruck Medical University, Innsbruck, Austria
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Mori A, Yabuta C, Kishimoto Y, Kozai S, Ohtori A, Shearer TR, Azuma M. In Silico Ocular Pharmacokinetic Modeling: Delivery of Topical FK962 to Retina. J Ocul Pharmacol Ther 2017; 33:556-566. [PMID: 28598703 DOI: 10.1089/jop.2016.0136] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
PURPOSES To establish the in silico ocular pharmacokinetic modeling for eye drops, and to simulate the dose regimen for FK962 in human choroid/retinal diseases. METHODS Pharmacokinetics for FK962 in vivo was performed by a single instillation of drops containing 0.1% 14C-FK962 in rabbit eyes. Permeation of FK962 across the cornea, sclera, and choroid/retina was measured in vitro. Neurite elongation by FK962 was measured in cultured rat retinal ganglion cells. Parameters from the experimental data were used in an improved in silico model of ocular pharmacokinetics of FK962 in man. RESULTS The mean concentration of FK962 in ocular tissues predicted by in silico modeling was consistent with in vivo results, validating the in silico model. FK962 rapidly penetrated into the anterior and posterior segments of the eye and then diffused into the vitreous body. The in silico pharmacokinetic modeling also predicted that a dose regimen of 0.0054% FK962 twice per day would produce biologically effective concentrations of FK962 in the choroid/retina, where FK962 facilitates rat neurite elongation. CONCLUSIONS Our in silico model for ocular pharmacokinetics is useful (1) for predicting drug concentrations in specific ocular tissues after topical instillation, and (2) for suggesting the optimal dose regimens for eye drops. The pharmacodynamics for FK962 produced by this model may be useful for clinical trials against retinal neuropathy.
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Affiliation(s)
- Ayumi Mori
- 1 Senju Laboratory, Senju Pharmaceutical Co., Ltd. , Kobe, Japan
| | - Chiho Yabuta
- 1 Senju Laboratory, Senju Pharmaceutical Co., Ltd. , Kobe, Japan
| | - Yayoi Kishimoto
- 1 Senju Laboratory, Senju Pharmaceutical Co., Ltd. , Kobe, Japan
| | - Seiko Kozai
- 1 Senju Laboratory, Senju Pharmaceutical Co., Ltd. , Kobe, Japan
| | - Akira Ohtori
- 1 Senju Laboratory, Senju Pharmaceutical Co., Ltd. , Kobe, Japan
| | - Thomas R Shearer
- 2 Department of Integrative Biosciences, Oregon Health & Science University , Portland, Oregon
| | - Mitsuyoshi Azuma
- 1 Senju Laboratory, Senju Pharmaceutical Co., Ltd. , Kobe, Japan .,2 Department of Integrative Biosciences, Oregon Health & Science University , Portland, Oregon
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Scuteri A, Ravasi M, Monfrini M, Milano A, D'Amico G, Miloso M, Tredici G. Human Mesenchymal Stem Cells Protect Dorsal Root Ganglia from the Neurotoxic Effect of Cisplatin. Anticancer Res 2015; 35:5383-5389. [PMID: 26408700] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND/AIM Peripheral neurotoxicity is a dose-limiting factor of many chemotherapeutic agents, including cisplatin. Mesenchymal stem cells are promising for the treatment of several neurological disorders, and our aim was to verify the neuroprotective potential of human mesenchymal stem cells (hMSCs) on dorsal root ganglia (DRG) exposed to cisplatin. MATERIALS AND METHODS DRG were exposed to different cisplatin concentrations and then co-cultured with hMSCs or with hMSC-conditioned medium. RESULTS hMSCs showed a neuroprotective effect on cisplatin-induced death of DRG, mediated by direct contact. Moreover, DRG exhibited an MSC-dependent promotion of neurite outgrowth, in particular at early time points. For this effect, the expression of Neurite Outgrowth Inhibitor (NOGO) and Myelin Associated Glycoprotein (MAG) by hMSCs was pivotal. CONCLUSION hMSCs are a promising tool for reducing the neurotoxic effect of cisplatin.
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Affiliation(s)
- Arianna Scuteri
- Experimental Neurology Unit, Department of Surgery and Translational Medicine, Milano-Bicocca University, Monza, Italy Milan Center for Neuroscience, Milan, Italy
| | - Maddalena Ravasi
- Experimental Neurology Unit, Department of Surgery and Translational Medicine, Milano-Bicocca University, Monza, Italy
| | - Marianna Monfrini
- Experimental Neurology Unit, Department of Surgery and Translational Medicine, Milano-Bicocca University, Monza, Italy PhD Neuroscience Program, Milano-Bicocca University, Monza, Italy Milan Center for Neuroscience, Milan, Italy
| | - Azzurra Milano
- Experimental Neurology Unit, Department of Surgery and Translational Medicine, Milano-Bicocca University, Monza, Italy
| | - Giovanna D'Amico
- M.Tettamanti" Research Center, Pediatric Clinic, Milano-Bicocca University, Monza, Italy
| | - Mariarosaria Miloso
- Experimental Neurology Unit, Department of Surgery and Translational Medicine, Milano-Bicocca University, Monza, Italy Milan Center for Neuroscience, Milan, Italy
| | - Giovanni Tredici
- Experimental Neurology Unit, Department of Surgery and Translational Medicine, Milano-Bicocca University, Monza, Italy Milan Center for Neuroscience, Milan, Italy
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Xu X, Harder J, Flynn DC, Lanier LM. AFAP120 regulates actin organization during neuronal differentiation. Differentiation 2009; 77:38-47. [PMID: 19281763 PMCID: PMC2664250 DOI: 10.1016/j.diff.2008.09.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [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: 04/19/2008] [Revised: 06/11/2008] [Accepted: 06/12/2008] [Indexed: 01/10/2023]
Abstract
During development, dynamic changes in the actin cytoskeleton determine both cell motility and morphological differentiation. In most mature tissues, cells are generally minimally motile and have morphologies specialized to their functions. In metastatic cancer, cells generally lose their specialized morphology and become motile. Therefore, proteins that regulate the transition between the motile and morphologically differentiated states can play important roles in determining cancer outcomes. AFAP120 is a neuronal-specific protein that binds Src kinase and protein kinase C (PKC) and cross-links actin filaments. Here we report that expression and tyrosine phosphorylation of AFAP120 are developmentally regulated in the cerebellum. In cerebellar cultures, PKC activation induces Src kinase-dependent phosphorylation of AFAP120, indicating that AFAP120 may be a downstream effector of Src. In neuroblastoma cells induced to differentiate by treatment with a PKC activator, tyrosine phosphorylation of AFAP120 appears to regulate the formation of the lamellar actin structures and subsequent neurite initiation. Together, these results indicate that AFAP120 plays a role in organizing dynamic actin structures during neuronal differentiation and suggest that AFAP120 may help regulate the transition from motile precursor to morphologically differentiated neurons.
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Affiliation(s)
- Xiaohua Xu
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455
| | - Jennifer Harder
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455
| | - Daniel C. Flynn
- Department of Microbiology & Immunology, West Virginia University, Morgantown, WV 26506
| | - Lorene M. Lanier
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455
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Nakagomi S, Suzuki Y, Namikawa K, Kiryu-Seo S, Kiyama H. Expression of the activating transcription factor 3 prevents c-Jun N-terminal kinase-induced neuronal death by promoting heat shock protein 27 expression and Akt activation. J Neurosci 2003; 23:5187-96. [PMID: 12832543 PMCID: PMC6741209] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
Activating transcription factor 3 (ATF3) is induced and functions both as a cellular response to stress and to stimulate proliferation in multiple tissues. However, in the nervous system ATF3 is expressed only in injured neurons. Here we reveal a function of ATF3 in neurons under death stress. Overexpression of ATF3 by adenovirus inhibits the mitogen-activated kinase kinase kinase 1 (MEKK1)-c-Jun N-Terminal Kinase (JNK)-induced apoptosis and induces neurite elongation via Akt activation in PC12 cells and superior nerve ganglion neurons. A DNA microarray study reveals that ATF3 expression and JNK activation induce expression of the heat shock protein 27 (Hsp27). Immunoprecipitation analysis and promoter assay for Hsp27 expression suggest that both ATF3 and c-Jun are necessary for transcriptional activation of Hsp27. Hsp27 expression significantly inhibits JNK-induced apoptosis as well as Akt activation in PC12 cells and superior cervical ganglion neurons. We conclude that the combination of ATF3 and c-Jun induces the anti-apoptotic factor Hsp27, which directly or indirectly activates Akt, and thereby possibly inhibits apoptosis and induces nerve elongation. Our results suggest that ATF3- and c-Jun-induced Hsp27 expression is a novel survival response in neurons under death stress such as nerve injury.
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Affiliation(s)
- Saya Nakagomi
- Department of Anatomy and Neurobiology, Osaka City University, Graduate School of Medicine, Osaka 545-8585, Japan
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