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Latifi S, Carmichael ST. The emergence of multiscale connectomics-based approaches in stroke recovery. Trends Neurosci 2024; 47:303-318. [PMID: 38402008 DOI: 10.1016/j.tins.2024.01.003] [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: 08/22/2023] [Revised: 12/31/2023] [Accepted: 01/21/2024] [Indexed: 02/26/2024]
Abstract
Stroke is a leading cause of adult disability. Understanding stroke damage and recovery requires deciphering changes in complex brain networks across different spatiotemporal scales. While recent developments in brain readout technologies and progress in complex network modeling have revolutionized current understanding of the effects of stroke on brain networks at a macroscale, reorganization of smaller scale brain networks remains incompletely understood. In this review, we use a conceptual framework of graph theory to define brain networks from nano- to macroscales. Highlighting stroke-related brain connectivity studies at multiple scales, we argue that multiscale connectomics-based approaches may provide new routes to better evaluate brain structural and functional remapping after stroke and during recovery.
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Affiliation(s)
- Shahrzad Latifi
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA; Department of Neuroscience, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26506, USA
| | - S Thomas Carmichael
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA.
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Ben Mihoub A, Elkhoury K, Nel J, Acherar S, Velot E, Malaplate C, Linder M, Latifi S, Kahn C, Huguet M, Yen FT, Arab-Tehrany E. Neuroprotective Effect of Curcumin-Loaded RGD Peptide-PEGylated Nanoliposomes. Pharmaceutics 2023; 15:2665. [PMID: 38140006 PMCID: PMC10747044 DOI: 10.3390/pharmaceutics15122665] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/06/2023] [Accepted: 11/16/2023] [Indexed: 12/24/2023] Open
Abstract
Curcumin is known for its anti-inflammatory, neuroprotective, and antioxidant properties, but its use in biological applications is hindered by its sensitivity to light, oxygen, and temperature. Furthermore, due to its low water solubility, curcumin has a poor pharmacokinetic profile and bioavailability. In this study, we evaluated the potential application of curcumin as a neuroprotective agent encapsulated in RGD peptide-PEGylated nanoliposomes developed from salmon-derived lecithin. Salmon lecithin, rich in polyunsaturated fatty acids, was used to formulate empty or curcumin-loaded nanoliposomes. Transmission electron microscopy, dynamic light scattering, and nanoparticle tracking analysis characterizations indicated that the marine-derived peptide-PEGylated nanoliposomes were spherical in shape, nanometric in size, and with an overall negative charge. Cytotoxicity tests of curcumin-loaded nanoliposomes revealed an improved tolerance of neurons to curcumin as compared to free curcumin. Wild-type SH-SY5Y were treated for 24 h with curcumin-loaded nanoliposomes, followed by 24 h incubation with conditioned media of SH-SY5Y expressing the Swedish mutation of APP containing a high ratio of Aβ40/42 peptides. Our results revealed significantly lower Aβ-induced cell toxicity in cells pre-treated with RGD peptide-PEGylated curcumin-loaded nanoliposomes, as compared to controls. Thus, our data highlight the potential use of salmon lecithin-derived RGD peptide PEGylated nanoliposomes for the efficient drug delivery of curcumin as a neuroprotective agent.
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Affiliation(s)
- Amina Ben Mihoub
- LIBio Laboratory, University of Lorraine, F-54000 Nancy, France; (A.B.M.); (J.N.); (M.L.); (C.K.)
- LCPM, CNRS, University of Lorraine, F-54000 Nancy, France;
| | - Kamil Elkhoury
- LIBio Laboratory, University of Lorraine, F-54000 Nancy, France; (A.B.M.); (J.N.); (M.L.); (C.K.)
| | - Janske Nel
- LIBio Laboratory, University of Lorraine, F-54000 Nancy, France; (A.B.M.); (J.N.); (M.L.); (C.K.)
| | - Samir Acherar
- LCPM, CNRS, University of Lorraine, F-54000 Nancy, France;
| | - Emilie Velot
- IMoPA, CNRS, University of Lorraine, F-54000 Nancy, France;
| | - Catherine Malaplate
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, F-54000 Nancy, France; (C.M.); (M.H.); (F.T.Y.)
| | - Michel Linder
- LIBio Laboratory, University of Lorraine, F-54000 Nancy, France; (A.B.M.); (J.N.); (M.L.); (C.K.)
| | - Shahrzad Latifi
- Department of Neuroscience, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26506, USA;
| | - Cyril Kahn
- LIBio Laboratory, University of Lorraine, F-54000 Nancy, France; (A.B.M.); (J.N.); (M.L.); (C.K.)
| | - Marion Huguet
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, F-54000 Nancy, France; (C.M.); (M.H.); (F.T.Y.)
| | - Frances T. Yen
- UR AFPA Laboratory, Qualivie Team, University of Lorraine, F-54000 Nancy, France; (C.M.); (M.H.); (F.T.Y.)
- INSERM UMR_S 1116 DCAC Laboratory, University of Lorraine, F-54000 Nancy, France
| | - Elmira Arab-Tehrany
- LIBio Laboratory, University of Lorraine, F-54000 Nancy, France; (A.B.M.); (J.N.); (M.L.); (C.K.)
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Bechay KR, Abduljawad N, Latifi S, Suzuki K, Iwashita H, Carmichael ST. PDE2A Inhibition Enhances Axonal Sprouting, Functional Connectivity, and Recovery after Stroke. J Neurosci 2022; 42:8225-8236. [PMID: 36163142 PMCID: PMC9653274 DOI: 10.1523/jneurosci.0730-22.2022] [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: 04/13/2022] [Revised: 09/06/2022] [Accepted: 09/11/2022] [Indexed: 11/21/2022] Open
Abstract
Phosphodiesterase (PDE) inhibitors have been safely and effectively used in the clinic and increase the concentration of intracellular cyclic nucleotides (cAMP/cGMP). These molecules activate downstream mediators, including the cAMP response element-binding protein (CREB), which controls neuronal excitability and growth responses. CREB gain of function enhances learning and allocates neurons into memory engrams. CREB also controls recovery after stroke. PDE inhibitors are linked to recovery from neural damage and to stroke recovery in specific sites within the brain. PDE2A is enriched in cortex. In the present study, we use a mouse cortical stroke model in young adult and aged male mice to test the effect of PDE2A inhibition on functional recovery, and on downstream mechanisms of axonal sprouting, tissue repair, and the functional connectivity of neurons in recovering cortex. Stroke causes deficits in use of the contralateral forelimb, loss of axonal projections in cortex adjacent to the infarct, and functional disconnection of neuronal networks. PDE2A inhibition enhances functional recovery, increases axonal projections in peri-infarct cortex, and, through two-photon in vivo imaging, enhances the functional connectivity of motor system excitatory neurons. PDE2A inhibition after stroke does not have an effect on other aspects of tissue repair, such as angiogenesis, gliogenesis, neurogenesis, and inflammatory responses. These data suggest that PDE2A inhibition is an effective therapeutic approach for stroke recovery in the rodent and that it simultaneously enhances connectivity in peri-infarct neuronal populations.SIGNIFICANCE STATEMENT Inhibition of PDE2A enhances motor recovery, axonal projections, and functional connectivity of neurons in peri-infarct tissue. This represents an avenue for a pharmacological therapy for stroke recovery.
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Affiliation(s)
- Kirollos Raouf Bechay
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095
| | - Nora Abduljawad
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095
| | - Shahrzad Latifi
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095
| | - Kazunori Suzuki
- Neuroscience Drug Discovery Unit, Research, Takeda Pharmaceutical Company Limited, Fujisawa 251-8555, Japan
| | - Hiroki Iwashita
- Neuroscience Drug Discovery Unit, Research, Takeda Pharmaceutical Company Limited, Fujisawa 251-8555, Japan
| | - S Thomas Carmichael
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095
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Latifi S, Mitchell S, Habibey R, Hosseini F, Donzis E, Estrada-Sánchez AM, Nejad HR, Levine M, Golshani P, Carmichael ST. Neuronal Network Topology Indicates Distinct Recovery Processes after Stroke. Cereb Cortex 2020; 30:6363-6375. [PMID: 32728724 DOI: 10.1093/cercor/bhaa191] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 02/25/2020] [Revised: 06/04/2020] [Accepted: 06/04/2020] [Indexed: 02/06/2023] Open
Abstract
Despite substantial recent progress in network neuroscience, the impact of stroke on the distinct features of reorganizing neuronal networks during recovery has not been defined. Using a functional connections-based approach through 2-photon in vivo calcium imaging at the level of single neurons, we demonstrate for the first time the functional connectivity maps during motion and nonmotion states, connection length distribution in functional connectome maps and a pattern of high clustering in motor and premotor cortical networks that is disturbed in stroke and reconstitutes partially in recovery. Stroke disrupts the network topology of connected inhibitory and excitatory neurons with distinct patterns in these 2 cell types and in different cortical areas. These data indicate that premotor cortex displays a distinguished neuron-specific recovery profile after stroke.
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Affiliation(s)
- Shahrzad Latifi
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
| | - Simon Mitchell
- Cancer Research Department, Brighton and Sussex Medical School, BN1 9PX, Brighton, UK
| | - Rouhollah Habibey
- Technische Universität Dresden, CRTD - Center for Regenerative Therapies at TU Dresden, D-01307, Dresden, German
| | | | - Elissa Donzis
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior, UCLA School of Medicine, 760 Westwood Plaza, Los
| | - Ana María Estrada-Sánchez
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior, UCLA School of Medicine, 760 Westwood Plaza, Los.,Divisioìn de Biologiìa Molecular, Instituto Potosino de Investigacioìn Cientiìfica y Tecnoloìgica (IPICYT), Camino a la presa San Joseì No. 2055, Colonia Lomas 4a seccioìn, C.P. 78216, San Luis Potosiì, Mexico
| | - H Rezaei Nejad
- Tufts University, Electrical and Computer Engineering Department, MA 02155, USA
| | - Michael Levine
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior, UCLA School of Medicine, 760 Westwood Plaza, Los
| | - Peyman Golshani
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA.,Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior, UCLA School of Medicine, 760 Westwood Plaza, Los
| | - S Thomas Carmichael
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
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Donzis EJ, Estrada-Sánchez AM, Indersmitten T, Oikonomou K, Tran CH, Wang C, Latifi S, Golshani P, Cepeda C, Levine MS. Cortical Network Dynamics Is Altered in Mouse Models of Huntington's Disease. Cereb Cortex 2020; 30:2372-2388. [PMID: 31761935 PMCID: PMC7174987 DOI: 10.1093/cercor/bhz245] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 07/27/2018] [Revised: 09/05/2019] [Accepted: 09/12/2019] [Indexed: 11/15/2022] Open
Abstract
Huntington's disease (HD) is a neurodegenerative disorder characterized by involuntary movements, cognitive deficits, and psychiatric disturbances. Although evidence indicates that projections from motor cortical areas play a key role in the development of dysfunctional striatal activity and motor phenotype, little is known about the changes in cortical microcircuits and their role in the development of the HD phenotype. Here we used two-photon laser-scanning microscopy to evaluate network dynamics of motor cortical neurons in layers II/III in behaving transgenic R6/2 and knock-in Q175+/- mice. Symptomatic R6/2 mice displayed increased motion manifested by a significantly greater number of motion epochs, whereas symptomatic Q175 mice displayed decreased motion. In both models, calcium transients in symptomatic mice displayed reduced amplitude, suggesting decreased bursting activity. Changes in frequency were genotype- and time-dependent; for R6/2 mice, the frequency was reduced during both motion and nonmotion, whereas in symptomatic Q175 mice, the reduction only occurred during nonmotion. In presymptomatic Q175 mice, frequency was increased during both behavioral states. Interneuronal correlation coefficients were generally decreased in both models, suggesting disrupted interneuronal communication in HD cerebral cortex. These results indicate similar and contrasting effects of the HD mutation on cortical ensemble activity depending on mouse model and disease stage.
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Affiliation(s)
- Elissa J Donzis
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior
| | - Ana María Estrada-Sánchez
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior
| | - Tim Indersmitten
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior
| | - Katerina Oikonomou
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior
| | - Conny H Tran
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior
| | - Catherine Wang
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior
| | - Shahrzad Latifi
- Department of Neurology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Peyman Golshani
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior
- Department of Neurology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
- Department of Neurology, West Los Angeles VA Medical Center, Los Angeles, CA 90073, USA
| | - Carlos Cepeda
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior
| | - Michael S Levine
- Intellectual and Developmental Disabilities Research Center, Jane and Terry Semel Institute for Neuroscience & Human Behavior
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Amani H, Habibey R, Hajmiresmail SJ, Latifi S, Pazoki-Toroudi H, Akhavan O. Antioxidant nanomaterials in advanced diagnoses and treatments of ischemia reperfusion injuries. J Mater Chem B 2017; 5:9452-9476. [PMID: 32264560 DOI: 10.1039/c7tb01689a] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Organ ischemia with inadequate oxygen supply followed by reperfusion (which initiates a complex of inflammatory responses and oxidative stress) occurs in different clinical conditions and surgical procedures including stroke, myocardial infarction, limb ischemia, renal failure, organ transplantation, free-tissue-transfer, cardiopulmonary bypass, and vascular surgery. Even though pharmacological treatments protect against experimental ischemia reperfusion (I/R) injury, there has not been enough success in their application for patient benefits. The main hurdles in the treatment of I/R injury are the lack of diagnosis tools for understanding the complicated chains of I/R-induced signaling events, especially in the acute phase after ischemia, determining the affected regions of the tissue over time, and then, targeting and safe delivery of antioxidants, drugs, peptides, genes and cells to the areas requiring treatment. Besides the innate antioxidant and free radical scavenging properties, some nanoparticles also show higher flexibility in drug delivery and imaging. This review highlights three main approaches in nanoparticle-mediated targeting of I/R injury: nanoparticles (1) as antioxidants for reducing tissue oxidative stress, (2) for targeted delivery of therapeutic agents to the ischemic regions or cells, and (3) for imaging I/R injury at the molecular, cellular or tissue level and monitoring its evolution using contrasts induced by nanoparticles. These approaches can also be combined to realize so called theranostics for providing simultaneous diagnosis of ischemic regions and treatments by targeted delivery.
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Affiliation(s)
- Hamed Amani
- Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine, Iran University of Medical Science, Tehran, Iran
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Chiacchiaretta M, Latifi S, Bramini M, Fadda M, Fassio A, Benfenati F, Cesca F. Neuronal hyperactivity causes Na +/H + exchanger-induced extracellular acidification at active synapses. J Cell Sci 2017; 130:1435-1449. [PMID: 28254883 DOI: 10.1242/jcs.198564] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 10/13/2016] [Accepted: 02/28/2017] [Indexed: 12/12/2022] Open
Abstract
Extracellular pH impacts on neuronal activity, which is in turn an important determinant of extracellular H+ concentration. The aim of this study was to describe the spatio-temporal dynamics of extracellular pH at synaptic sites during neuronal hyperexcitability. To address this issue we created ex.E2GFP, a membrane-targeted extracellular ratiometric pH indicator that is exquisitely sensitive to acidic shifts. By monitoring ex.E2GFP fluorescence in real time in primary cortical neurons, we were able to quantify pH fluctuations during network hyperexcitability induced by convulsant drugs or high-frequency electrical stimulation. Sustained hyperactivity caused a pH decrease that was reversible upon silencing of neuronal activity and located at active synapses. This acidic shift was not attributable to the outflow of synaptic vesicle H+ into the cleft nor to the activity of membrane-exposed H+ V-ATPase, but rather to the activity of the Na+/H+-exchanger. Our data demonstrate that extracellular synaptic pH shifts take place during epileptic-like activity of neural cultures, emphasizing the strict links existing between synaptic activity and synaptic pH. This evidence may contribute to the understanding of the physio-pathological mechanisms associated with hyperexcitability in the epileptic brain.
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Affiliation(s)
- Martina Chiacchiaretta
- Center for Synaptic Neuroscience and Technology, Fondazione Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, Genova 16132, Italy.,Department of Experimental Medicine, University of Genova, Viale Benedetto XV 3, Genova 16132, Italy
| | - Shahrzad Latifi
- Center for Synaptic Neuroscience and Technology, Fondazione Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, Genova 16132, Italy
| | - Mattia Bramini
- Center for Synaptic Neuroscience and Technology, Fondazione Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, Genova 16132, Italy
| | - Manuela Fadda
- Department of Experimental Medicine, University of Genova, Viale Benedetto XV 3, Genova 16132, Italy
| | - Anna Fassio
- Center for Synaptic Neuroscience and Technology, Fondazione Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, Genova 16132, Italy.,Department of Experimental Medicine, University of Genova, Viale Benedetto XV 3, Genova 16132, Italy
| | - Fabio Benfenati
- Center for Synaptic Neuroscience and Technology, Fondazione Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, Genova 16132, Italy.,Department of Experimental Medicine, University of Genova, Viale Benedetto XV 3, Genova 16132, Italy
| | - Fabrizia Cesca
- Center for Synaptic Neuroscience and Technology, Fondazione Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, Genova 16132, Italy
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Latifi S, Tamayol A, Habibey R, Sabzevari R, Kahn C, Geny D, Eftekharpour E, Annabi N, Blau A, Linder M, Arab-Tehrany E. Natural lecithin promotes neural network complexity and activity. Sci Rep 2016; 6:25777. [PMID: 27228907 PMCID: PMC4882550 DOI: 10.1038/srep25777] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 04/22/2016] [Indexed: 11/09/2022] Open
Abstract
Phospholipids in the brain cell membranes contain different polyunsaturated fatty acids (PUFAs), which are critical to nervous system function and structure. In particular, brain function critically depends on the uptake of the so-called "essential" fatty acids such as omega-3 (n-3) and omega-6 (n-6) PUFAs that cannot be readily synthesized by the human body. We extracted natural lecithin rich in various PUFAs from a marine source and transformed it into nanoliposomes. These nanoliposomes increased neurite outgrowth, network complexity and neural activity of cortical rat neurons in vitro. We also observed an upregulation of synapsin I (SYN1), which supports the positive role of lecithin in synaptogenesis, synaptic development and maturation. These findings suggest that lecithin nanoliposomes enhance neuronal development, which may have an impact on devising new lecithin delivery strategies for therapeutic applications.
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Affiliation(s)
- Shahrzad Latifi
- Neuroscience and Brain Technologies Department, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy.,Department of Neurology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA
| | - Ali Tamayol
- Regenerative Medicine Program, University of Manitoba, Winnipeg, MB, Canada.,Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02139, USA
| | - Rouhollah Habibey
- Neuroscience and Brain Technologies Department, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Reza Sabzevari
- Robotics and Perception Group, Artificial Intelligence Lab, University of Zurich, Andreasstrasse 15, 8050 Zurich, Switzerland
| | - Cyril Kahn
- IFSTTAR, LBA, F-13015, Marseille, France
| | - David Geny
- Imaging Center for Psychiatry and Neurosciences, INSERM U894, Paris, France
| | | | - Nasim Annabi
- Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02115
| | - Axel Blau
- Neuroscience and Brain Technologies Department, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Michel Linder
- Université de Lorraine, Laboratoire d'Ingénierie des Biomolécules, 2, Avenue de la Forêt de Haye, F-54504 Vandoeuvre-lès-Nancy Cedex, France
| | - Elmira Arab-Tehrany
- Université de Lorraine, Laboratoire d'Ingénierie des Biomolécules, 2, Avenue de la Forêt de Haye, F-54504 Vandoeuvre-lès-Nancy Cedex, France
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Habibey R, Golabchi A, Latifi S, Difato F, Blau A. A microchannel device tailored to laser axotomy and long-term microelectrode array electrophysiology of functional regeneration. Lab Chip 2015; 15:4578-4590. [PMID: 26507288 DOI: 10.1039/c5lc01027f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We designed a miniaturized and thin polydimethylsiloxane (PDMS) microchannel device compatible with commercial microelectrode array (MEA) chips. It was optimized for selective axonal ablation by laser microdissection (LMD) to investigate the electrophysiological and morphological responses to a focal injury in distinct network compartments over 45 days in vitro (45 DIV). Low-density cortical or hippocampal networks (<3500 neurons per device) were cultured in quasi-closed somal chambers. Their axons were selectively filtered through neurite cavities and guided into the PDMS microchannels aligned over the recording electrodes. The device geometries amplified extracellularly recorded signals in the somal reservoir and the axonal microchannels to detectable levels. Locally extended areas along the microchannel, so-called working stations, forced axonal bundles to branch out and thereby allowed for their repeatable and controllable local, partial or complete dissections. Proximal and distal changes in the activity and morphology of the dissected axons were monitored and compared to those of their parent networks and of intact axons in the control microchannels. Microscopy images confirmed progressive anterograde degeneration of distal axonal segments over four weeks after surgery. Dissection on cortical and hippocampal axons revealed different cell type- and age-dependent network responses. At 17 DIV, network activity increased in both the somal and proximal microchannel compartments of the dissected hippocampal or cortical axons. At later days (24 DIV), the hippocampal networks were more susceptible to axonal injury. While their activity decreased, that in the cortical cultures actually increased. Subsequent partial dissections of the same axonal bundles led to a stepwise activity reduction in the distal hippocampal or cortical axonal fragments. We anticipate that the MEA-PDMS microchannel device for the combined morphological and electrophysiological study of axonal de- and regeneration can be easily merged with other experimental paradigms like molecular or pharmacological screening studies.
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Affiliation(s)
- Rouhollah Habibey
- Department of Neuroscience and Brain Technologies (NBT), Italian Institute of Technology (IIT), via Morego 30, 16163 Genoa, Italy.
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Shakeri J, Yazdanshenas Ghazwin M, Rakizadeh E, Moshari A, Sharbatdaralaei H, Latifi S, Tavakoli SAH. Do spinal cord-injured individuals with stronger sense of coherence use different psychological defense styles? Spinal Cord 2015; 54:843-848. [PMID: 26620875 DOI: 10.1038/sc.2015.213] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 10/21/2015] [Accepted: 10/30/2015] [Indexed: 11/09/2022]
Abstract
OBJECTIVES Although the importance of sense of coherence (SOC) and psychological defense mechanisms (PDMs) in the process of coping has been demonstrated, it has not yet been clarified whether individuals with stronger SOC use specific PDMs. STUDY DESIGN Cross-sectional. SETTING Iran. METHODS Demographic and injury-related variables including injury level, time since injury, American Spinal Cord Association (ASIA) Scale and Spinal cord independence measure-III were collected among individuals with spinal cord injury (SCI). SOC was assessed by the Short-form Sense of Coherence Scale. PDMs were identified using 40-version of the Defense Style Questionnaire. RESULTS Neurotic defense style was the most commonly used style especially. The overall most commonly used PDM was 'rationalization', which was used by 95%. Individuals with stronger SOC used more mature style (P=0.001, r=0.52), particularly 'humor' and 'suppression' mechanisms (P<0.0001 and 0.024, respectively). There was a negative correlation between stronger SOC and the use of immature defenses including passive aggression (P=0.001, r=-0.51), acting out (P=0.001, r=-0.48), isolation (P=0.009, r=-0.50), autistic fantasy (P=0.010, r=-0.30) and somatization (P<0.0001, r=-0.62). Married individuals had significantly stronger SOC (P=0.01). Age, gender, age at the time of injury incidence, time since injury, ASIA score and cause of injury were not determinants of SOC. CONCLUSION In this study, PDMs, which are more probable to be used by individuals with stronger SOC, have been identified. Mature defenses including 'humor' and 'suppression' are used by stronger SOC more often, whereas immature mechanisms are less likely to be used.
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Affiliation(s)
- J Shakeri
- Department of Psychiatry Behavioral Sciences Research Center, Farabi Hospital, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - M Yazdanshenas Ghazwin
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - E Rakizadeh
- Islamic Ahvaz University, Ahvaz Branch, Ahvaz, Iran
| | - A Moshari
- Iran University of Medical Sciences, Tehran, Iran
| | - H Sharbatdaralaei
- Shahid Hasheminejad Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - S Latifi
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - S A H Tavakoli
- Psychiatrist, Iranian Tissue Bank & Research Center, Tehran University of Medical Sciences, Tehran, Iran
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Saalfrank D, Konduri AK, Latifi S, Habibey R, Golabchi A, Martiniuc AV, Knoll A, Ingebrandt S, Blau A. Incubator-independent cell-culture perfusion platform for continuous long-term microelectrode array electrophysiology and time-lapse imaging. R Soc Open Sci 2015; 2:150031. [PMID: 26543581 PMCID: PMC4632545 DOI: 10.1098/rsos.150031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 05/19/2015] [Indexed: 06/05/2023]
Abstract
Most in vitro electrophysiology studies extract information and draw conclusions from representative, temporally limited snapshot experiments. This approach bears the risk of missing decisive moments that may make a difference in our understanding of physiological events. This feasibility study presents a simple benchtop cell-culture perfusion system adapted to commercial microelectrode arrays (MEAs), multichannel electrophysiology equipment and common inverted microscopy stages for simultaneous and uninterrupted extracellular electrophysiology and time-lapse imaging at ambient CO2 levels. The concept relies on a transparent, replica-casted polydimethylsiloxane perfusion cap, gravity- or syringe-pump-driven perfusion and preconditioning of pH-buffered serum-free cell-culture medium to ambient CO2 levels at physiological temperatures. The low-cost microfluidic in vitro enabling platform, which allows us to image cultures immediately after cell plating, is easy to reproduce and is adaptable to the geometries of different cell-culture containers. It permits the continuous and simultaneous multimodal long-term acquisition or manipulation of optical and electrophysiological parameter sets, thereby considerably widening the range of experimental possibilities. Two exemplary proof-of-concept long-term MEA studies on hippocampal networks illustrate system performance. Continuous extracellular recordings over a period of up to 70 days revealed details on both sudden and gradual neural activity changes in maturing cell ensembles with large intra-day fluctuations. Correlated time-lapse imaging unveiled rather static macroscopic network architectures with previously unreported local morphological oscillations on the timescale of minutes.
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Affiliation(s)
- Dirk Saalfrank
- Department of Neuroscience and Brain Technologies (NBT), Italian Institute of Technology (IIT), via Morego 30, Genoa 16163, Italy
- Department of Informatics and Microsystem Technology, University of Applied Sciences Kaiserslautern, Amerikastraße 1, Zweibrücken 66482, Germany
| | - Anil Krishna Konduri
- Department of Neuroscience and Brain Technologies (NBT), Italian Institute of Technology (IIT), via Morego 30, Genoa 16163, Italy
| | - Shahrzad Latifi
- Department of Neuroscience and Brain Technologies (NBT), Italian Institute of Technology (IIT), via Morego 30, Genoa 16163, Italy
| | - Rouhollah Habibey
- Department of Neuroscience and Brain Technologies (NBT), Italian Institute of Technology (IIT), via Morego 30, Genoa 16163, Italy
| | - Asiyeh Golabchi
- Department of Neuroscience and Brain Technologies (NBT), Italian Institute of Technology (IIT), via Morego 30, Genoa 16163, Italy
| | - Aurel Vasile Martiniuc
- Computer Science Department VI, Technical University Munich (TUM), Boltzmannstraße 3, Garching 85748, Germany
| | - Alois Knoll
- Computer Science Department VI, Technical University Munich (TUM), Boltzmannstraße 3, Garching 85748, Germany
| | - Sven Ingebrandt
- Department of Informatics and Microsystem Technology, University of Applied Sciences Kaiserslautern, Amerikastraße 1, Zweibrücken 66482, Germany
| | - Axel Blau
- Department of Neuroscience and Brain Technologies (NBT), Italian Institute of Technology (IIT), via Morego 30, Genoa 16163, Italy
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Norouzi Javidan A, Sabour H, Latifi S, Abrishamkar M, Soltani Z, Shidfar F, Emami Razavi H. Does consumption of polyunsaturated fatty acids influence on neurorehabilitation in traumatic spinal cord-injured individuals? A double-blinded clinical trial. Spinal Cord 2014; 52:378-82. [PMID: 24637568 DOI: 10.1038/sc.2014.30] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 02/12/2014] [Accepted: 02/18/2014] [Indexed: 01/05/2023]
Abstract
STUDY DESIGN A double-blinded randomized clinical trial. OBJECTIVES The anti-inflammatory and neuroprotective effect of omega-3 fatty acids have been shown so far, but still its influence on clinical measures in spinal cord-injured human models were not known. We tried to investigate changes in disability and dependency scores in chronic traumatic spinal cord-injured patients after 14 months of ω-3 fatty-acid consumption. METHODS Main inclusion criteria were: traumatic spinal cord injury (SCI) and post injury duration longer than 1 year. Disability and dependency was assessed using U.K Functional Independence Measure and Functional Assessment Measure (FIM+FAM) scale. MorDHA capsules (435 mg of docosahexaenoic acid and 65 mg of eicosapentaenoic acid) were administered in treatment group, whereas control group received placebo capsules for 14 months. U.K. FIM+FAM scale were estimated before intervention and at the end of the trial. RESULTS Fifty-four patients in treatment group and 50 patients in placebo group completed the trial. Highest scores were detected in cognitive domain in both groups before and after intervention. Most dependency was observed in locomotion subscale and secondly in sphincter control. Scores of none of these components were changed by ω-3 fatty-acid consumption. CONCLUSION Although omega-3 fatty acids have been shown to have neuroprotective effect in acute phase of SCI, it seems that they have no significant influence in chronic inflammatory state of SCI. The positive effect of ω-3 fatty acid in chronic neurorecovery process, if exists, is weaker to exert any significant improvement in UK FIM+FAM scores in spinal cord-injured individuals.
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Affiliation(s)
- A Norouzi Javidan
- Brain and Spinal Injury Research Center (BASIR), Tehran University of Medical Sciences, Tehran, Iran
| | - H Sabour
- Brain and Spinal Injury Research Center (BASIR), Tehran University of Medical Sciences, Tehran, Iran
| | - S Latifi
- Brain and Spinal Injury Research Center (BASIR), Tehran University of Medical Sciences, Tehran, Iran
| | - M Abrishamkar
- Brain and Spinal Injury Research Center (BASIR), Tehran University of Medical Sciences, Tehran, Iran
| | - Z Soltani
- Brain and Spinal Injury Research Center (BASIR), Tehran University of Medical Sciences, Tehran, Iran
| | - F Shidfar
- Nutrition Department, Iran University of Medical Sciences, Tehran, Iran
| | - H Emami Razavi
- Brain and Spinal Injury Research Center (BASIR), Tehran University of Medical Sciences, Tehran, Iran
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Norouzi Javidan A, Yazdi Samadi F, Latifi S, Jafari Nodoushan M, Mobedi H. A novel controlled release drug delivery system for naltrexone administration combined with intermittent morphine to induce antinociception. J Drug Deliv Sci Technol 2014. [DOI: 10.1016/s1773-2247(14)50082-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Paonessa F, Latifi S, Scarongella H, Cesca F, Benfenati F. Specificity protein 1 (Sp1)-dependent activation of the synapsin I gene (SYN1) is modulated by RE1-silencing transcription factor (REST) and 5'-cytosine-phosphoguanine (CpG) methylation. J Biol Chem 2012; 288:3227-39. [PMID: 23250796 PMCID: PMC3561544 DOI: 10.1074/jbc.m112.399782] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The development and function of the nervous system are directly dependent on a well defined pattern of gene expression. Indeed, perturbation of transcriptional activity or epigenetic modifications of chromatin can dramatically influence neuronal phenotypes. The phosphoprotein synapsin I (Syn I) plays a crucial role during axonogenesis and synaptogenesis as well as in synaptic transmission and plasticity of mature neurons. Abnormalities in SYN1 gene expression have been linked to important neuropsychiatric disorders, such as epilepsy and autism. SYN1 gene transcription is suppressed in non-neural tissues by the RE1-silencing transcription factor (REST); however, the molecular mechanisms that allow the constitutive expression of this genetic region in neurons have not been clarified yet. Herein we demonstrate that a conserved region of human and mouse SYN1 promoters contains cis-sites for the transcriptional activator Sp1 in close proximity to REST binding motifs. Through a series of functional assays, we demonstrate a physical interaction of Sp1 on the SYN1 promoter and show that REST directly inhibits Sp1-mediated transcription, resulting in SYN1 down-regulation. Upon differentiation of neuroblastoma Neuro2a cells, we observe a decrease in endogenous REST and a higher stability of Sp1 on target GC boxes, resulting in an increase of SYN1 transcription. Moreover, methylation of Sp1 cis-sites in the SYN1 promoter region could provide an additional level of transcriptional regulation. Our results introduce Sp1 as a fundamental activator of basal SYN1 gene expression, whose activity is modulated by the neural master regulator REST and CpG methylation.
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Affiliation(s)
- Francesco Paonessa
- Department of Neuroscience and Brain Technologies, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
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Thyagarajan S, Chavan A, Al-Sabbagh A, Latifi S, Kelsall AW. The provision of cardiology services in a non-cardiac paediatric intensive care unit setting. Arch Dis Child 2010; 95:1068. [PMID: 20605866 DOI: 10.1136/adc.2009.170720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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