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Neural Plasticity in Multiple Sclerosis: The Functional and Molecular Background
Dominika Justyna Ksiazek-Winiarek1, Piotr Szpakowski1, Andrzej Glabinski1
1Department of Neurology and Stroke, Medical University of Lodz, Zeromskiego Street 113, 90-549 Lodz, Poland.
Abstract:
Multiple sclerosis is an autoimmune neurodegenerative disorder resulting in motor dysfunction and cognitive decline. The inflammatory and neurodegenerative changes seen in the brains of MS patients lead to progressive disability and increasing brain atrophy. The most common type of MS is characterized by episodes of clinical exacerbations and remissions. This suggests the presence of compensating mechanisms for accumulating damage. Apart from the widely known repair mechanisms like remyelination, another important phenomenon is neuronal plasticity. Initially, neuroplasticity was connected with the developmental stages of life; however, there is now growing evidence confirming that structural and functional reorganization occurs throughout our lifetime. Several functional studies, utilizing such techniques as fMRI, TBS, or MRS, have provided valuable data about the presence of neuronal plasticity in MS patients. CNS ability to compensate for neuronal damage is most evident in RR-MS; however it has been shown that brain plasticity is also preserved in patients with substantial brain damage. Regardless of the numerous studies, the molecular background of neuronal plasticity in MS is still not well understood. Several factors, like IL-1β, BDNF, PDGF, or CB1Rs, have been implicated in functional recovery from the acute phase of MS and are thus considered as potential therapeutic targets.
Insights
Multiple sclerosis (MS) involves brain damage, but the brain can compensate through neuroplasticity. Understanding the molecular basis of this plasticity may reveal new therapeutic targets for MS.
Area of Science:
- Neuroscience
- Immunology
- Neurology
Background:
- Multiple sclerosis (MS) is an autoimmune neurodegenerative disorder causing motor and cognitive impairments.
- MS pathology includes inflammation, neurodegeneration, and brain atrophy, leading to progressive disability.
- Relapsing-remitting MS (RR-MS) exhibits exacerbations and remissions, suggesting compensatory mechanisms.
Purpose of the Study:
- To explore the role of neuronal plasticity in compensating for brain damage in MS patients.
- To review current understanding of neuroplasticity in MS, including its molecular underpinnings.
- To identify potential therapeutic targets related to neuroplasticity for MS treatment.
Main Methods:
- Functional neuroimaging techniques such as functional magnetic resonance imaging (fMRI).
- Transcranial magnetic stimulation (TMS) and magnetic resonance spectroscopy (MRS) were used to assess brain function.
- Review of existing literature on molecular factors implicated in MS recovery.
Main Results:
- Evidence confirms the presence of neuronal plasticity in MS patients, even with significant brain damage.
- Central nervous system (CNS) compensation is most apparent in RR-MS.
- Factors like IL-1β, BDNF, PDGF, and CB1Rs are implicated in functional recovery.
Conclusions:
- Neuronal plasticity is a crucial mechanism for compensating for neuronal damage in MS.
- Despite evidence of plasticity, the precise molecular mechanisms in MS remain incompletely understood.
- Identifying and targeting molecular factors involved in neuroplasticity holds promise for future MS therapies.
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