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Amyotrophic lateral sclerosis: current understanding.

T Charles1, M Swash

  • 1Department of Neurology, Royal London Hospital, Whitechapel, London E1 1BB, England.

The Journal of Neuroscience Nursing : Journal of the American Association of Neuroscience Nurses
|October 24, 2001
PubMed
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Amyotrophic lateral sclerosis (ALS), a fatal motor neuron disease, causes progressive muscle weakness due to neuron degeneration. While glutamate and risk factors are implicated, the cause of sporadic ALS remains unclear, with riluzole being the only approved treatment.

Area of Science:

  • Neuroscience
  • Neurology
  • Genetics

Background:

  • Amyotrophic lateral sclerosis (ALS), also known as motor neuron disease (MND), is a fatal, progressive neurodegenerative disorder affecting voluntary muscles.
  • It results from the degeneration of upper and lower motor neurons, leading to spastic paralysis, muscle weakness, and wasting, while sparing sensory and oculomotor functions.
  • ALS is the most prevalent adult MND syndrome, with unknown etiology, though glutamate excitotoxicity and potential environmental risk factors like chemical exposure are investigated.

Purpose of the Study:

  • To summarize the current understanding of Amyotrophic Lateral Sclerosis (ALS) pathogenesis, risk factors, and treatment options.
  • To highlight the role of glutamate in neuronal cell death and discuss postulated environmental risk factors.
  • To present riluzole as the sole disease-specific treatment for ALS.

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Main Methods:

  • Review of existing literature on ALS pathophysiology and epidemiology.
  • Analysis of the role of glutamate and potential environmental triggers.
  • Summary of current therapeutic strategies, including riluzole.

Main Results:

  • The degeneration of motor neurons is the primary cause of ALS symptoms.
  • Glutamate is implicated in neuronal cell death, and factors like welding, lead, chemicals, and electrical trauma are potential risk factors.
  • Approximately 90% of ALS cases are sporadic, with familial cases linked to SOD1 gene mutations; the cause of sporadic ALS is not fully understood.
  • Riluzole demonstrates neuroprotective effects and is the only disease-specific treatment approved for ALS.

Conclusions:

  • ALS is a complex neurodegenerative disease with multifactorial causes, including genetic and environmental factors.
  • Understanding the pathogenesis of sporadic ALS is crucial for developing effective treatments.
  • Riluzole offers a neuroprotective benefit, and further research is needed to explore additional therapeutic avenues and symptom management strategies.