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Related Concept Videos

Multiple Sclerosis l: Introduction01:19

Multiple Sclerosis l: Introduction

Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
Secondary Spinal Cord Injury llI: Pathophysiology01:25

Secondary Spinal Cord Injury llI: Pathophysiology

Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...
Spinal Cord Injury ll: Pathophysiology01:14

Spinal Cord Injury ll: Pathophysiology

Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...
Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...

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Related Experiment Video

Updated: May 29, 2026

Intraspinal Cell Transplantation for Targeting Cervical Ventral Horn in Amyotrophic Lateral Sclerosis and Traumatic Spinal Cord Injury
10:49

Intraspinal Cell Transplantation for Targeting Cervical Ventral Horn in Amyotrophic Lateral Sclerosis and Traumatic Spinal Cord Injury

Published on: September 18, 2011

Targeting progressive neuroaxonal injury: lessons from multiple sclerosis.

Amit Bar-Or1, Peter Rieckmann, Anthony Traboulsee

  • 1Department of Neurology and Neurosurgery and Microbiology and Immunology, McGill University, Neuroimmunology Unit, Montreal, QC, Canada.

CNS Drugs
|August 30, 2011
PubMed
Summary

Multiple Sclerosis (MS) offers a model for studying neurodegeneration and developing treatments for Alzheimer's disease (AD), Parkinson's disease (PD), and ALS. Early detection of neuroaxonal injury in MS can inform therapies for these conditions.

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Last Updated: May 29, 2026

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Area of Science:

  • Neuroscience
  • Neurology
  • Immunology

Background:

  • Neurodegenerative diseases like Alzheimer's disease (AD), Parkinson's disease (PD), and amyotrophic lateral sclerosis (ALS) share common pathways of neuroaxonal injury.
  • Early detection of neurodegeneration is crucial for effective neuroprotective therapies, as significant damage often occurs before symptom onset.
  • Multiple Sclerosis (MS) presents an opportunity as a model disease due to its earlier onset and diagnostic window compared to classic neurodegenerative diseases.

Purpose of the Study:

  • To explore the potential of Multiple Sclerosis (MS) as a model for understanding neuroaxonal injury and regeneration in the central nervous system (CNS).
  • To investigate common pathophysiological mechanisms between MS and classic neurodegenerative diseases, including inflammation, iron and mitochondrial dysregulation, and protein abnormalities.
  • To evaluate advanced imaging techniques for monitoring neuroaxonal injury and disease progression in MS and their implications for neurodegenerative disease treatment.

Main Methods:

  • Review of current understanding of neuroaxonal injury mechanisms in MS and neurodegenerative diseases.
  • Comparison of common pathological factors, including protein aggregates (alpha-synuclein, tau) and immune mediators.
  • Assessment of conventional and advanced Magnetic Resonance Imaging (MRI) techniques (e.g., MTR, DWI, DTI) and Optical Coherence Tomography (OCT) for detecting neuroaxonal injury.

Main Results:

  • MS shares commonalities with AD, PD, and ALS, including inflammation-led neurodegeneration and dysregulation of iron, mitochondria, and specific proteins.
  • Conventional MRI markers have limited predictive value for MS progression, necessitating advanced techniques.
  • Current MS therapies primarily target inflammation, with limited efficacy in preventing neuroaxonal injury progression.

Conclusions:

  • Multiple Sclerosis (MS) can serve as a valuable clinical model for studying neuroaxonal injury and regeneration.
  • Advanced MRI and OCT techniques show promise for longitudinal monitoring of neurodegeneration and assessing therapeutic effects in MS.
  • Insights gained from MS research could significantly advance treatment strategies for major neurodegenerative diseases like AD, PD, and ALS.