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Related Experiment Videos

ALS and mercury intoxication: a relationship?

Julien Praline1, Anne-Marie Guennoc, Nadège Limousin

  • 1Department of Neurology and Neurophysiology, CHRU, Tours, France. julien.praline@med.univ-tours.fr

Clinical Neurology and Neurosurgery
|August 28, 2007
PubMed
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This case study suggests mercury intoxication may contribute to amyotrophic lateral sclerosis (ALS) development. Despite chelation treatment, the patient with mercury poisoning and ALS-like symptoms died after 17 months.

Area of Science:

  • Neurology
  • Toxicology
  • Environmental Medicine

Background:

  • The pathophysiology of sporadic amyotrophic lateral sclerosis (ALS) is not fully understood.
  • Environmental factors, including heavy metal exposure, are increasingly considered potential contributors to ALS.
  • Previous reports have linked mercury intoxication to ALS, though such cases are rare.

Observation:

  • An 81-year-old woman presented with clinical and electromyographic findings indicative of amyotrophic lateral sclerosis (ALS).
  • Laboratory tests revealed significantly elevated blood mercury levels and massive urinary mercury excretion, confirming mercury intoxication.
  • The patient received chelation therapy with Meso 2-3 dimercaptosuccinic acid (DMSA).

Findings:

  • Despite DMSA treatment, the patient's condition progressed, and she died 17 months after diagnosis.

Related Experiment Videos

  • The clinical presentation and electromyographic patterns strongly suggested ALS.
  • The findings support a potential role for mercury intoxication in the pathogenesis of ALS.

    • Implications:

    • This case highlights the neurotoxic potential of mercury and its possible association with motor neuron diseases like ALS.
    • Further research into heavy metal exposure as an environmental trigger for ALS is warranted.
    • Investigating environmental toxins may offer new avenues for understanding and potentially preventing ALS.