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Costa MFD, Rösler TW, Höglinger GU. Exploring the neuroprotective potential of Nrf2-pathway activators against annonacin toxicity. Sci Rep 2024; 14:20123. [PMID: 39209951 PMCID: PMC11362529 DOI: 10.1038/s41598-024-70837-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 08/21/2024] [Indexed: 09/04/2024] Open
Abstract
Modulation of the Nrf2 pathway, a master regulator of the antioxidant response and cellular metabolism, has been suggested as a promising therapeutic strategy in tauopathies, a heterogeneous group of neurodegenerative disorders characterized by intracellular proteinaceous inclusions of abnormally phosphorylated tau. Here, we explored the neuroprotective potential of different Nrf2-pathway activators in human immortalized dopaminergic neurons against annonacin-induced toxicity, a mitochondrial inhibitor associated with a PSP-like syndrome and capable of mimicking tauopathy-like features. Interestingly, we observed heterogenous and compound-dependent neuroprotective effects among the different Nrf2-pathway activators. With the exception of Fyn inhibitors, all the selected Nrf2-pathway activators improved cell viability and the oxidative status, and reduced the annonacin-induced tau hyperphosphorylation and neurite degeneration, particularly the p62-activators. However, improvement of the impaired mitochondrial function was only observed by the Bach-1 inhibitor. Surprisingly, we found evidence that ezetimibe, an approved drug for hypercholesterolemia, prevents the transcriptional upregulation of 4R-tau triggered by annonacin insult. Overall, our results suggest that the neuroprotective effects of the Nrf2-pathway activators against annonacin toxicity may rely on the specific mechanism of action, intrinsic to each compound, and possibly on the concomitant modulation of additional signaling pathways. Further research will be needed to fully understand how synergistic modulation of metabolic adaptation and cell survival can be exploit to develop new therapeutical strategies for tauopathies and eventually other neurodegenerative diseases.
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Affiliation(s)
- Márcia F D Costa
- German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
- Department of Neurology, Hannover Medical School, Hannover, Germany
- Laboratory of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Thomas W Rösler
- German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
| | - Günter U Höglinger
- German Center for Neurodegenerative Diseases (DZNE), Munich, Germany.
- Department of Neurology, Hannover Medical School, Hannover, Germany.
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany.
- Department of Neurology, LMU Hospital, Ludwig-Maximilians-University (LMU), Munich, Germany.
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2
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Hoffmann C, Cho E, Zalesky A, Di Biase MA. From pixels to connections: exploring in vitro neuron reconstruction software for network graph generation. Commun Biol 2024; 7:571. [PMID: 38750282 PMCID: PMC11096190 DOI: 10.1038/s42003-024-06264-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 04/29/2024] [Indexed: 05/18/2024] Open
Abstract
Digital reconstruction has been instrumental in deciphering how in vitro neuron architecture shapes information flow. Emerging approaches reconstruct neural systems as networks with the aim of understanding their organization through graph theory. Computational tools dedicated to this objective build models of nodes and edges based on key cellular features such as somata, axons, and dendrites. Fully automatic implementations of these tools are readily available, but they may also be purpose-built from specialized algorithms in the form of multi-step pipelines. Here we review software tools informing the construction of network models, spanning from noise reduction and segmentation to full network reconstruction. The scope and core specifications of each tool are explicitly defined to assist bench scientists in selecting the most suitable option for their microscopy dataset. Existing tools provide a foundation for complete network reconstruction, however more progress is needed in establishing morphological bases for directed/weighted connectivity and in software validation.
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Affiliation(s)
- Cassandra Hoffmann
- Systems Neuroscience Lab, Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne, Parkville, Australia.
| | - Ellie Cho
- Biological Optical Microscopy Platform, University of Melbourne, Parkville, Australia
| | - Andrew Zalesky
- Systems Neuroscience Lab, Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne, Parkville, Australia
- Department of Biomedical Engineering, The University of Melbourne, Parkville, Australia
| | - Maria A Di Biase
- Systems Neuroscience Lab, Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne, Parkville, Australia
- Stem Cell Disease Modelling Lab, Department of Anatomy and Physiology, The University of Melbourne, Parkville, Australia
- Psychiatry Neuroimaging Laboratory, Department of Psychiatry, Brigham and Women's Hospital, Harvard Medical School, Boston, USA
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3
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Shakya R, Amonruttanapun P, Limboonreung T, Chongthammakun S. 17β-estradiol mitigates the inhibition of SH-SY5Y cell differentiation through WNT1 expression. Cells Dev 2023; 176:203881. [PMID: 37914154 DOI: 10.1016/j.cdev.2023.203881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 10/01/2023] [Accepted: 10/27/2023] [Indexed: 11/03/2023]
Abstract
17β-estradiol (E2) and canonical WNT-signaling represent crucial regulatory pathways for microtubule dynamics and synaptic formation. However, it is unclear yet whether E2-induced canonical WNT ligands have significant impact on neurogenic repair under inflammatory condition. In this study, first, we prepared the chronic activated-microglial-conditioned media, known to be comprised of neuro-inflammatory components. Long term exposure of microglial conditioned media to SH-SY5Y cells showed a negative impact on differentiation markers, microtubule associated protein-2 (MAP2) and synaptophysin (SYP), which was successfully rescued by pre and co-treatment of 10 nM 17β-estradiol. The inhibition of estrogen receptors, ERα and ERβ significantly blocked the E2-mediated recovery in the expression of differentiation marker, SYP. Furthermore, the inflammatory inhibition of canonical signaling ligand, WNT1 was also found to be rescued by E2. To our surprise, E2 was unable to replicate this success with β-catenin, which is considered to be the intracellular transducer of canonical WNT signaling. However, WNT antagonist - Dkk1 blocked the E2-mediated recovery in the expression of the differentiation marker, MAP2. Therefore, our data suggests that E2-mediated recovery in SH-SY5Y differentiation follows a divergent pathway from the conventional canonical WNT signaling pathway, which seems to regulate microtubule stability without the involvement of β-catenin. This mechanism provides fresh insight into how estradiol contributes to the restoration of differentiation marker proteins in the context of chronic neuroinflammation.
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Affiliation(s)
- Rubina Shakya
- Department of Anatomy and Center for Neuroscience Faculty of Science, Mahidol University, Bangkok 10400, Thailand; Department of Anatomy, Kathmandu University, School of Medical Sciences, Dhulikhel, Kavre 11008, Nepal.
| | - Prateep Amonruttanapun
- Chulabhorn International College of Medicine, Thammasat University, Rangsit Campus, Pathumthani 12121, Thailand.
| | - Tanapol Limboonreung
- Department of Oral Biology, Faculty of Dentistry, King Mongkut's Institute of Technology Ladkrabang, Ladkrabang, Bangkok 10520, Thailand.
| | - Sukumal Chongthammakun
- Department of Anatomy and Center for Neuroscience Faculty of Science, Mahidol University, Bangkok 10400, Thailand
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Wæhler HA, Labba NA, Paulsen RE, Sandve GK, Eskeland R. ANDA: an open-source tool for automated image analysis of in vitro neuronal cells. BMC Neurosci 2023; 24:56. [PMID: 37875799 PMCID: PMC10594822 DOI: 10.1186/s12868-023-00826-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 10/16/2023] [Indexed: 10/26/2023] Open
Abstract
BACKGROUND Imaging of in vitro neuronal differentiation and measurements of cell morphologies have led to novel insights into neuronal development. Live-cell imaging techniques and large datasets of images have increased the demand for automated pipelines for quantitative analysis of neuronal morphological metrics. RESULTS ANDA is an analysis workflow that quantifies various aspects of neuronal morphology from high-throughput live-cell imaging screens of in vitro neuronal cell types. This tool automates the analysis of neuronal cell numbers, neurite lengths and neurite attachment points. We used chicken, rat, mouse, and human in vitro models for neuronal differentiation and have demonstrated the accuracy, versatility, and efficiency of the tool. CONCLUSIONS ANDA is an open-source tool that is easy to use and capable of automated processing from time-course measurements of neuronal cells. The strength of this pipeline is the capability to analyse high-throughput imaging screens.
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Affiliation(s)
- Hallvard Austin Wæhler
- Institute of Basic Medical Sciences, Department of Molecular Medicine, Faculty of Medicine, University of Oslo, Blindern, 1112, 0317, Oslo, Norway
- PharmaTox Strategic Research Initiative, Faculty of Mathematics and Natural Sciences, University of Oslo, 0316, Oslo, Norway
- Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0317, Oslo, Norway
| | - Nils-Anders Labba
- Institute of Basic Medical Sciences, Department of Molecular Medicine, Faculty of Medicine, University of Oslo, Blindern, 1112, 0317, Oslo, Norway
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, 0316, Oslo, Norway
- PharmaTox Strategic Research Initiative, Faculty of Mathematics and Natural Sciences, University of Oslo, 0316, Oslo, Norway
| | - Ragnhild Elisabeth Paulsen
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, 0316, Oslo, Norway
- PharmaTox Strategic Research Initiative, Faculty of Mathematics and Natural Sciences, University of Oslo, 0316, Oslo, Norway
| | - Geir Kjetil Sandve
- Department of Informatics, University of Oslo, 0316, Oslo, Norway
- PharmaTox Strategic Research Initiative, Faculty of Mathematics and Natural Sciences, University of Oslo, 0316, Oslo, Norway
| | - Ragnhild Eskeland
- Institute of Basic Medical Sciences, Department of Molecular Medicine, Faculty of Medicine, University of Oslo, Blindern, 1112, 0317, Oslo, Norway.
- PharmaTox Strategic Research Initiative, Faculty of Mathematics and Natural Sciences, University of Oslo, 0316, Oslo, Norway.
- Centre for Cancer Cell Reprogramming, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 0317, Oslo, Norway.
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5
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Rotherham M, Moradi Y, Nahar T, Mosses D, Telling N, El Haj AJ. Magnetic activation of TREK1 triggers stress signalling and regulates neuronal branching in SH-SY5Y cells. FRONTIERS IN MEDICAL TECHNOLOGY 2022; 4:981421. [PMID: 36545473 PMCID: PMC9761330 DOI: 10.3389/fmedt.2022.981421] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 11/16/2022] [Indexed: 12/07/2022] Open
Abstract
TWIK-related K+ 1 (TREK1) is a potassium channel expressed in the nervous system with multiple functions including neurotransmission and is a prime pharmacological target for neurological disorders. TREK1 gating is controlled by a wide range of external stimuli including mechanical forces. Previous work has demonstrated that TREK1 can be mechano-activated using magnetic nanoparticles (MNP) functionalised with antibodies targeted to TREK1 channels. Once the MNP are bound, external dynamic magnetic fields are used to generate forces on the TREK channel. This approach has been shown to drive cell differentiation in cells from multiple tissues. In this work we investigated the effect of MNP-mediated TREK1 mechano-activation on early stress response pathways along with the differentiation and connectivity of neuronal cells using the model neuronal cell line SH-SY5Y. Results showed that TREK1 is well expressed in SH-SY5Y and that TREK1-MNP initiate c-Myc/NF-κB stress response pathways as well as Nitrite production after magnetic stimulation, indicative of the cellular response to mechanical cues. Results also showed that TREK1 mechano-activation had no overall effect on neuronal morphology or expression of the neuronal marker βIII-Tubulin in Retinoic Acid (RA)/Brain-derived Neurotrophic factor (BDNF) differentiated SH-SY5Y but did increase neurite number. These results suggest that TREK1 is involved in cellular stress response signalling in neuronal cells, which leads to increased neurite production, but is not involved in regulating RA/BDNF mediated neuronal differentiation.
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Affiliation(s)
- Michael Rotherham
- Healthcare Technologies Institute, School of Chemical Engineering, University of Birmingham, Heritage Building, Mindelsohn Way, Edgbaston, Birmingham, United Kingdom,School of Pharmacy and Bioengineering, Keele University, Guy Hilton Research Centre, Stoke-on-Trent, United Kingdom,Correspondence: Michael Rotherham
| | - Yasamin Moradi
- School of Pharmacy and Bioengineering, Keele University, Guy Hilton Research Centre, Stoke-on-Trent, United Kingdom
| | - Tasmin Nahar
- School of Pharmacy and Bioengineering, Keele University, Guy Hilton Research Centre, Stoke-on-Trent, United Kingdom
| | - Dominic Mosses
- School of Pharmacy and Bioengineering, Keele University, Guy Hilton Research Centre, Stoke-on-Trent, United Kingdom,Regenerative Medicine and Cellular Therapies, School of Pharmacy, Faculty of Science, University of Nottingham, Nottingham, United Kingdom
| | - Neil Telling
- School of Pharmacy and Bioengineering, Keele University, Guy Hilton Research Centre, Stoke-on-Trent, United Kingdom
| | - Alicia J. El Haj
- Healthcare Technologies Institute, School of Chemical Engineering, University of Birmingham, Heritage Building, Mindelsohn Way, Edgbaston, Birmingham, United Kingdom,School of Pharmacy and Bioengineering, Keele University, Guy Hilton Research Centre, Stoke-on-Trent, United Kingdom
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Huang K, Lou S, Wang C, Thanawala MS, Turner J, Fink A, Ji L, Sadaghiani M, Huang P, Dai H. DeepNeurite™: Identification of neurites from non‐specific binding of fluorescence probes through deep learning. FASEB Bioadv 2021. [DOI: 10.1096/fba.2021-00072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
| | - Shan Lou
- Cygnal Therapeutics Cambridge Massachusetts USA
| | | | | | | | - Alex Fink
- Cygnal Therapeutics Cambridge Massachusetts USA
| | - Lexiang Ji
- Cygnal Therapeutics Cambridge Massachusetts USA
| | | | - Pearl Huang
- Cygnal Therapeutics Cambridge Massachusetts USA
| | - Hongyue Dai
- Cygnal Therapeutics Cambridge Massachusetts USA
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Mani N, Ahnood A, Peng D, Tong W, Booth M, Jones A, Murdoch B, Tran N, Houshyar S, Fox K. Single-Step Fabrication Method toward 3D Printing Composite Diamond-Titanium Interfaces for Neural Applications. ACS APPLIED MATERIALS & INTERFACES 2021; 13:31474-31484. [PMID: 34192459 DOI: 10.1021/acsami.1c07318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Owing to several key attributes, diamond is an attractive candidate material for neural interfacing electrodes. The emergence of additive-manufacturing (AM) of diamond-based materials has addressed multiple challenges associated with the fabrication of diamond electrodes using the conventional chemical vapor deposition (CVD) approach. Unlike the CVD approach, AM methods have enabled the deposition of three-dimensional diamond-based material at room temperature. This work demonstrates the feasibility of using laser metal deposition to fabricate diamond-titanium hybrid electrodes for neuronal interfacing. In addition to exhibiting a high electrochemical capacitance of 1.1 mF cm-2 and a low electrochemical impedance of 1 kΩ cm2 at 1 kHz in physiological saline, these electrodes exhibit a high degree of biocompatibility assessed in vitro using cortical neurons. Furthermore, surface characterization methods show the presence of an oxygen-rich mixed-phase diamond-titanium surface along the grain boundaries. Overall, we demonstrated that our unique approach facilitates printing biocompatible titanium-diamond site-specific coating-free conductive hybrid surfaces using AM, which paves the way to printing customized electrodes and interfacing implantable medical devices.
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Affiliation(s)
- Nour Mani
- School of Engineering, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3001, Australia
- Centre for Additive Manufacturing, RMIT University, 58 Cardigan Street, Melbourne, Victoria 3001, Australia
| | - Arman Ahnood
- School of Engineering, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3001, Australia
| | - Danli Peng
- School of Physics, The University of Melbourne, Tin Alley, Parkville, Melbourne, Victoria 3010, Australia
| | - Wei Tong
- School of Physics, The University of Melbourne, Tin Alley, Parkville, Melbourne, Victoria 3010, Australia
- National Vision Research Institute, Australian College of Optometry, Carlton, Victoria 3010, Australia
| | - Marsilea Booth
- School of Engineering, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3001, Australia
| | - Alan Jones
- Centre for Additive Manufacturing, RMIT University, 58 Cardigan Street, Melbourne, Victoria 3001, Australia
| | - Billy Murdoch
- RMIT Microscopy and Microanalysis Facility, 124 La Trobe Street, Melbourne, Victoria 3001, Australia
| | - Nhiem Tran
- School of Science, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3001, Australia
| | - Shadi Houshyar
- School of Engineering, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3001, Australia
| | - Kate Fox
- School of Engineering, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3001, Australia
- Centre for Additive Manufacturing, RMIT University, 58 Cardigan Street, Melbourne, Victoria 3001, Australia
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8
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Boulan B, Beghin A, Ravanello C, Deloulme JC, Gory-Fauré S, Andrieux A, Brocard J, Denarier E. AutoNeuriteJ: An ImageJ plugin for measurement and classification of neuritic extensions. PLoS One 2020; 15:e0234529. [PMID: 32673338 PMCID: PMC7365462 DOI: 10.1371/journal.pone.0234529] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 06/29/2020] [Indexed: 01/02/2023] Open
Abstract
Morphometry characterization is an important procedure in describing neuronal cultures and identifying phenotypic differences. This task usually requires labor-intensive measurements and the classification of numerous neurites from large numbers of neurons in culture. To automate these measurements, we wrote AutoNeuriteJ, an imageJ/Fiji plugin that measures and classifies neurites from a very large number of neurons. We showed that AutoNeuriteJ is able to detect variations of neuritic growth induced by several compounds known to affect the neuronal growth. In these experiments measurement of more than 5000 mouse neurons per conditions was obtained within a few hours. Moreover, by analyzing mouse neurons deficient for the microtubule associated protein 6 (MAP6) and wild type neurons we illustrate that AutoNeuriteJ is capable to detect subtle phenotypic difference in axonal length. Overall the use of AutoNeuriteJ will provide rapid, unbiased and accurate measurement of neuron morphologies.
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Affiliation(s)
- Benoit Boulan
- Univ. Grenoble Alpes, Inserm U1216, CEA, Grenoble Institut Neurosciences, Grenoble, France
| | - Anne Beghin
- MechanoBiology Institute (MBI) at NUS Singapore MBI, T-Lab, Singapore
| | - Charlotte Ravanello
- Univ. Grenoble Alpes, Inserm U1216, CEA, Grenoble Institut Neurosciences, Grenoble, France
| | | | - Sylvie Gory-Fauré
- Univ. Grenoble Alpes, Inserm U1216, CEA, Grenoble Institut Neurosciences, Grenoble, France
| | - Annie Andrieux
- Univ. Grenoble Alpes, Inserm U1216, CEA, Grenoble Institut Neurosciences, Grenoble, France
| | - Jacques Brocard
- Univ. Grenoble Alpes, Inserm U1216, CEA, Grenoble Institut Neurosciences, Grenoble, France
| | - Eric Denarier
- Univ. Grenoble Alpes, Inserm U1216, CEA, Grenoble Institut Neurosciences, Grenoble, France
- * E-mail:
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Schechter M, Grigoletto J, Abd-Elhadi S, Glickstein H, Friedman A, Serrano GE, Beach TG, Sharon R. A role for α-Synuclein in axon growth and its implications in corticostriatal glutamatergic plasticity in Parkinson's disease. Mol Neurodegener 2020; 15:24. [PMID: 32228705 PMCID: PMC7104492 DOI: 10.1186/s13024-020-00370-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 02/25/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND α-Synuclein (α-Syn) is a protein implicated in the pathogenesis of Parkinson's disease (PD). α-Syn has been shown to associate with membranes and bind acidic phospholipids. However, the physiological importance of these associations to the integrity of axons is not fully clear. METHODS Biochemical, immunohistochemical and ultrastructural analyses in cultured neurons, transgenic mouse brains, PD and control human brains. RESULTS We analyzed the ultrastructure of cross-sectioned axons localized to white matter tracts (WMTs), within the dorsal striatum of old and symptomatic α-Syn transgenic mouse brains. The analysis indicated a higher density of axons of thinner diameter. Our findings in cultured cortical neurons indicate a role for α-Syn in elongation of the main axon and its collaterals, resulting in enhanced axonal arborization. We show that α-Syn effect to enhance axonal outgrowth is mediated through its activity to regulate membrane levels of the acidic phosphatidylinositol 4,5-bisphosphate (PI4,5P2). Moreover, our findings link α-Syn- enhanced axonal growth with evidence for axonal injury. In relevance to disease mechanisms, we detect in human brains evidence for a higher degree of corticostriatal glutamatergic plasticity within WMTs at early stages of PD. However, at later PD stages, the respective WMTs in the caudate are degenerated with accumulation of Lewy pathology. CONCLUSIONS Our results show that through regulating PI4,5P2 levels, α-Syn acts to elongate the main axon and collaterals, resulting in a higher density of axons in the striatal WMTs. Based on these results we suggest a role for α-Syn in compensating mechanisms, involving corticostriatal glutamatergic plasticity, taking place early in PD.
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Affiliation(s)
- Meir Schechter
- Department of Biochemistry and Molecular Biology, IMRIC, The Hebrew University-Hadassah Medical School, Ein Kerem, 9112001 Jerusalem, Israel
| | - Jessica Grigoletto
- Department of Biochemistry and Molecular Biology, IMRIC, The Hebrew University-Hadassah Medical School, Ein Kerem, 9112001 Jerusalem, Israel
| | - Suaad Abd-Elhadi
- Department of Biochemistry and Molecular Biology, IMRIC, The Hebrew University-Hadassah Medical School, Ein Kerem, 9112001 Jerusalem, Israel
| | - Hava Glickstein
- Electron Microscopy Unit, The Hebrew University-Hadassah Medical School, Ein Kerem, 9112001 Jerusalem, Israel
| | - Alexander Friedman
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139 USA
| | | | | | - Ronit Sharon
- Department of Biochemistry and Molecular Biology, IMRIC, The Hebrew University-Hadassah Medical School, Ein Kerem, 9112001 Jerusalem, Israel
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10
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Inhibition of excessive kallikrein-8 improves neuroplasticity in Alzheimer's disease mouse model. Exp Neurol 2020; 324:113115. [DOI: 10.1016/j.expneurol.2019.113115] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 10/02/2019] [Accepted: 11/12/2019] [Indexed: 01/24/2023]
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11
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Kim SM, Ueki M, Ren X, Akimoto J, Sakai Y, Ito Y. Micropatterned nanolayers immobilized with nerve growth factor for neurite formation of PC12 cells. Int J Nanomedicine 2019; 14:7683-7694. [PMID: 31571871 PMCID: PMC6756831 DOI: 10.2147/ijn.s217416] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 08/08/2019] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Nerve regeneration is important for the treatment of degenerative diseases and neurons injured by accidents. Nerve growth factor (NGF) has been previously conjugated to materials for promotion of neurogenesis. MATERIALS AND METHODS Photoreactive gelatin was prepared by chemical coupling of gelatin with azidobenzoic acid (P-gel), and then NGF was immobilized on substrates in the presence or absence of micropatterned photomasks. UV irradiation induced crosslinking reactions of P-gel with itself, NGF, and the plate for immobilization. RESULTS By adjustment of the P-gel concentration, the nanometer-order height of micropatterns was controlled. NGF was quantitatively immobilized with increasing amounts of P-gel. Immobilized NGF induced neurite outgrowth of PC12 cells, a cell line derived from a pheochromocytoma of the rat adrenal medulla, at the same level as soluble NGF. The immobilized NGF showed higher thermal stability than the soluble NGF and was repeatedly used without loss of biological activity. The 3D structure (height of the formed micropattern) regulated the behavior of neurite guidance. As a result, the orientation of neurites was regulated by the stripe pattern width. CONCLUSION The micropattern-immobilized NGF nanolayer biochemically and topologically regulated neurite formation.
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Affiliation(s)
- Seong Min Kim
- Nano Medical Engineering Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama351-0198, Japan
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo113-8656, Japan
| | - Masashi Ueki
- Nano Medical Engineering Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama351-0198, Japan
| | - Xueli Ren
- Emergent Bioengineering Materials Research Team, RIKEN Center for Emergent Matter Science, Wako, Saitama351-0198, Japan
| | - Jun Akimoto
- Nano Medical Engineering Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama351-0198, Japan
| | - Yasuyuki Sakai
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo113-8656, Japan
| | - Yoshihiro Ito
- Nano Medical Engineering Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama351-0198, Japan
- Emergent Bioengineering Materials Research Team, RIKEN Center for Emergent Matter Science, Wako, Saitama351-0198, Japan
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12
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Sanchez-Rodriguez A, Abad P, Arias-Alvarez M, Rebollar PG, Bautista JM, Lorenzo PL, García-García RM. Recombinant rabbit beta nerve growth factor production and its biological effects on sperm and ovulation in rabbits. PLoS One 2019; 14:e0219780. [PMID: 31318941 PMCID: PMC6639004 DOI: 10.1371/journal.pone.0219780] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 07/01/2019] [Indexed: 12/28/2022] Open
Abstract
In some induced-ovulating species, beta nerve growth factor (β-NGF) has important roles in ovulation, though data for rabbits are still inconclusive. In this study we first synthesized functional recombinant β-NGF from rabbit tissue (rrβ-NGF) to address the following objectives: 1) to compare rabbit β-NGF amino acid sequence with those of other induced- or spontaneous-ovulating species; 2) to assess the effects of rrβ-NGF on rabbit sperm viability and motility, and 3) to examine the in vivo ovulation inducing effect of rrβ-NGF added to the seminal dose in rabbit does. The NGF gene in rabbit prostate tissue was sequenced by Rapid Amplification of cDNA Ends and annotated in GenBank (KX528686). Recombinant rβ-NGF was produced in CHO cells and purified by affinity chromatography. Once confirmed by Western blotting and mass spectrometry (MALDI-TOF) that the amino acid sequence of the recombinant protein corresponded to β-NGF, its functionality was validated in PC12 cells in a successful dose-response study over 8 days. The amino acid sequence of prostate rabbit NGF differed to that of other species mainly in its receptor binding sites. In all the spontaneous ovulating species examined, compared with rabbit, alanine and proline residues, which interact with the high-affinity receptor, were replaced by a serine. In rabbits, asparagine and methionine were substituted by lysine at the low-affinity receptor binding site. In time- and dose-response experiments, the in vitro addition of rrβ-NGF to the ejaculate did not affect sperm viability whereas sperm motility parameters were enhanced by the addition of 1 μg/mL of the neuropeptide. Addition of this same concentration of rrβ-NGF to the seminal dose administered via the intravaginal route in does induced ovulation with a delayed LH peak, leading to a plasma progesterone increase, gestation and delivery. Our findings suggest that rrβ-NGF could be a useful option for biotechnological and reproduction assisted techniques in rabbits but further studies are needed.
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Affiliation(s)
- Ana Sanchez-Rodriguez
- Department of Physiology, Faculty of Veterinary Sciences, Complutense University of Madrid, Madrid, Spain
| | - Paloma Abad
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Sciences, Complutense University of Madrid, Madrid, Spain
| | - María Arias-Alvarez
- Department of Animal Production, Faculty of Veterinary Sciences, Complutense University of Madrid, Madrid, Spain
| | - Pilar G. Rebollar
- Department of Agrarian Production, ETSIAAB, Polytechnic University of Madrid, Madrid, Spain
| | - José M. Bautista
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Sciences, Complutense University of Madrid, Madrid, Spain
| | - Pedro L. Lorenzo
- Department of Physiology, Faculty of Veterinary Sciences, Complutense University of Madrid, Madrid, Spain
| | - Rosa M. García-García
- Department of Physiology, Faculty of Veterinary Sciences, Complutense University of Madrid, Madrid, Spain
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Powell JM, Plummer NW, Scappini EL, Tucker CJ, Jensen P. DEFiNE: A Method for Enhancement and Quantification of Fluorescently Labeled Axons. Front Neuroanat 2019; 12:117. [PMID: 30687025 PMCID: PMC6336715 DOI: 10.3389/fnana.2018.00117] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 12/17/2018] [Indexed: 11/29/2022] Open
Abstract
Visualization and quantification of fluorescently labeled axonal fibers are widely employed in studies of neuronal connectivity in the brain. However, accurate analysis of axon density is often confounded by autofluorescence and other fluorescent artifacts. By the time these problems are detected in labeled tissue sections, significant time and resources have been invested, and the tissue may not be easy to replace. In response to these difficulties, we have developed Digital Enhancement of Fibers with Noise Elimination (DEFiNE), a method for eliminating fluorescent artifacts from digital images based on their morphology and fluorescence spectrum, thus permitting enhanced visualization and quantification of axonal fibers. Application of this method is facilitated by a DEFiNE macro, written using ImageJ Macro Language (IJM), which includes an automated and customizable procedure for image processing and a semi-automated quantification method that accounts for any remaining local variation in background intensity. The DEFiNE macro is open-source and used with the widely available FIJI software for maximum accessibility.
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Affiliation(s)
- Jeanne M Powell
- Neurobiology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, United States Department of Health and Human Services, Durham, NC, United States
| | - Nicholas W Plummer
- Neurobiology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, United States Department of Health and Human Services, Durham, NC, United States
| | - Erica L Scappini
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, United States Department of Health and Human Services, Durham, NC, United States
| | - Charles J Tucker
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, United States Department of Health and Human Services, Durham, NC, United States
| | - Patricia Jensen
- Neurobiology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, United States Department of Health and Human Services, Durham, NC, United States
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