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Novel Therapeutic Approaches for Neural Repair

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Neurobiology".

Deadline for manuscript submissions: closed (15 July 2023) | Viewed by 11196

Special Issue Editors


E-Mail Website
Guest Editor
UMR 8256 Biological Adaptation and Ageing, Sorbonne University, Paris, France
Interests: neural circuit repair

E-Mail Website
Guest Editor
UMR 8256 Biological Adaptation and Ageing, Sorbonne University, Paris, France
Interests: neurobiology; neurophysiology; cellular neuroscience

Special Issue Information

Dear Colleagues,

The high precision of brain circuits is established during development and relies on processes involving axon outgrowth, synapse formation, and the elimination of some synapses and cells, in addition to myelination processes. These processes involve both permissive and inhibitory molecules, which are highly specific to the developmental stage, and thus repairing these connections after injury or in pathology is susceptible to connection errors and associated functional abnormalities. Even in situations where treatments promote neuronal survival or replacement with grafts, these neurons still need to develop new connections to integrate into and repair the neural network. Therefore, avoiding connection errors during repair is still a major challenge in neuroscience. As the cellular environment is very different in the adult versus the developing brain, repair processes cannot simply recapitulate development. Although many molecules have been identified as potential treatments through their capacity to increase neuronal survival or induce axonal sprouting, they are often poorly translational, requiring invasive administration, and are not necessarily feasible for clinical use (e.g., the injection of neurotrophic factors to increase axonal sprouting).

To advance our understanding and ability to repair neural circuits and restore brain function, it becomes essential not only to identify potentially useful molecules but also to determine the means of delivering them to the appropriate region of the brain.

This Special Issue invites articles addressing the questions of what molecular processes that are more readily applicable to the clinic can facilitate or hinder repair; how they can be delivered into the central nervous system to promote reconnectivity within neural circuits; and how functional and structural improvement can be evaluated after treatment.

Topics include, but are not limited to:

  • Psychomotor activation in environmental enrichment;
  • The use of virtual reality;
  • Noninvasive brain stimulation;
  • Deep brain stimulation;
  • Pharmacological or combinatorial methods of promoting recovery and/or behavioural adaptation.

Articles may be original research papers, reviews, or short communications.

Prof. Dr. Rachel M. Sherrard
Prof. Dr. Ann M. Lohof
Guest Editors

Manuscript Submission Information

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Keywords

  • neural circuit repair
  • rehabilitation
  • noninvasive brain stimulation
  • synapse formation
  • neurodegenerative disease
  • traumatic lesion
  • reinnervation
  • translational research

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Published Papers (3 papers)

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Review

17 pages, 3458 KiB  
Review
Magnetic Stimulation as a Therapeutic Approach for Brain Modulation and Repair: Underlying Molecular and Cellular Mechanisms
by Tom Dufor, Ann M. Lohof and Rachel M. Sherrard
Int. J. Mol. Sci. 2023, 24(22), 16456; https://doi.org/10.3390/ijms242216456 - 17 Nov 2023
Cited by 10 | Viewed by 3785
Abstract
Neurological and psychiatric diseases generally have no cure, so innovative non-pharmacological treatments, including non-invasive brain stimulation, are interesting therapeutic tools as they aim to trigger intrinsic neural repair mechanisms. A common brain stimulation technique involves the application of pulsed magnetic fields to affected [...] Read more.
Neurological and psychiatric diseases generally have no cure, so innovative non-pharmacological treatments, including non-invasive brain stimulation, are interesting therapeutic tools as they aim to trigger intrinsic neural repair mechanisms. A common brain stimulation technique involves the application of pulsed magnetic fields to affected brain regions. However, investigations of magnetic brain stimulation are complicated by the use of many different stimulation parameters. Magnetic brain stimulation is usually divided into two poorly connected approaches: (1) clinically used high-intensity stimulation (0.5–2 Tesla, T) and (2) experimental or epidemiologically studied low-intensity stimulation (μT–mT). Human tests of both approaches are reported to have beneficial outcomes, but the underlying biology is unclear, and thus optimal stimulation parameters remain ill defined. Here, we aim to bring together what is known about the biology of magnetic brain stimulation from human, animal, and in vitro studies. We identify the common effects of different stimulation protocols; show how different types of pulsed magnetic fields interact with nervous tissue; and describe cellular mechanisms underlying their effects—from intracellular signalling cascades, through synaptic plasticity and the modulation of network activity, to long-term structural changes in neural circuits. Recent advances in magneto-biology show clear mechanisms that may explain low-intensity stimulation effects in the brain. With its large breadth of stimulation parameters, not available to high-intensity stimulation, low-intensity focal magnetic stimulation becomes a potentially powerful treatment tool for human application. Full article
(This article belongs to the Special Issue Novel Therapeutic Approaches for Neural Repair)
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19 pages, 1063 KiB  
Review
Interactions between Guidance Cues and Neuronal Activity: Therapeutic Insights from Mouse Models
by Maitri Tomar, Jamie Beros, Bruno Meloni and Jennifer Rodger
Int. J. Mol. Sci. 2023, 24(8), 6966; https://doi.org/10.3390/ijms24086966 - 9 Apr 2023
Cited by 1 | Viewed by 2768
Abstract
Topographic mapping of neural circuits is fundamental in shaping the structural and functional organization of brain regions. This developmentally important process is crucial not only for the representation of different sensory inputs but also for their integration. Disruption of topographic organization has been [...] Read more.
Topographic mapping of neural circuits is fundamental in shaping the structural and functional organization of brain regions. This developmentally important process is crucial not only for the representation of different sensory inputs but also for their integration. Disruption of topographic organization has been associated with several neurodevelopmental disorders. The aim of this review is to highlight the mechanisms involved in creating and refining such well-defined maps in the brain with a focus on the Eph and ephrin families of axon guidance cues. We first describe the transgenic models where ephrin-A expression has been manipulated to understand the role of these guidance cues in defining topography in various sensory systems. We further describe the behavioral consequences of lacking ephrin-A guidance cues in these animal models. These studies have given us unexpected insight into how neuronal activity is equally important in refining neural circuits in different brain regions. We conclude the review by discussing studies that have used treatments such as repetitive transcranial magnetic stimulation (rTMS) to manipulate activity in the brain to compensate for the lack of guidance cues in ephrin-knockout animal models. We describe how rTMS could have therapeutic relevance in neurodevelopmental disorders with disrupted brain organization. Full article
(This article belongs to the Special Issue Novel Therapeutic Approaches for Neural Repair)
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22 pages, 1464 KiB  
Review
Antioxidant Intervention to Improve Cognition in the Aging Brain: The Example of Hydroxytyrosol and Resveratrol
by Sergio Terracina, Carla Petrella, Silvia Francati, Marco Lucarelli, Christian Barbato, Antonio Minni, Massimo Ralli, Antonio Greco, Luigi Tarani, Marco Fiore and Giampiero Ferraguti
Int. J. Mol. Sci. 2022, 23(24), 15674; https://doi.org/10.3390/ijms232415674 - 10 Dec 2022
Cited by 24 | Viewed by 3919
Abstract
Both physiological and pathological aging processes induce brain alterations especially affecting the speed of processing, working memory, conceptual reasoning and executive functions. Many therapeutic approaches to reduce the impact of brain aging on cognitive functioning have been tested; unfortunately, there are no satisfactory [...] Read more.
Both physiological and pathological aging processes induce brain alterations especially affecting the speed of processing, working memory, conceptual reasoning and executive functions. Many therapeutic approaches to reduce the impact of brain aging on cognitive functioning have been tested; unfortunately, there are no satisfactory results as a single therapy. As aging is partly contributed by free radical reactions, it has been proposed that exogenous antioxidants could have a positive impact on both aging and its associated manifestations. The aim of this report is to provide a summary and a subsequent review of the literature evidence on the role of antioxidants in preventing and improving cognition in the aging brain. Manipulation of endogenous cellular defense mechanisms through nutritional antioxidants or pharmacological compounds represents an innovative approach to therapeutic intervention in diseases causing brain tissue damage, such as neurodegeneration. Coherently with this notion, antioxidants, especially those derived from the Mediterranean diet such as hydroxytyrosol and resveratrol, seem to be able to delay and modulate the cognitive brain aging processes and decrease the occurrence of its effects on the brain. The potential preventive activity of antioxidants should be evaluated in long-term exposure clinical trials, using preparations with high bioavailability, able to bypass the blood-brain barrier limitation, and that are well standardized. Full article
(This article belongs to the Special Issue Novel Therapeutic Approaches for Neural Repair)
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