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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
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Mitochondrial function and pathology in status epilepticus.

Laurence A Bindoff1

  • 1Institute of Clinical Medicine, University of Bergen and Department of Neurology, Haukeland University Hospital, Bergen, Norway. laurence.bindoff@helse-bergen.no

Epilepsia
|October 5, 2011
PubMed
Summary
This summary is machine-generated.

Mitochondrial diseases, including MELAS and POLG disorders, frequently cause epilepsy and status epilepticus. This study suggests energy failure leads to cortical damage, explaining seizures in these conditions.

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Area of Science:

  • Neuroscience
  • Mitochondrial Biology
  • Genetics

Background:

  • Mitochondrial respiratory chain defects cause diverse diseases affecting any tissue or age.
  • Epilepsy and status epilepticus are common comorbidities in mitochondrial disorders.
  • Mitochondrial diseases can stem from mitochondrial DNA (mtDNA) or nuclear gene mutations.

Purpose of the Study:

  • To investigate the shared mechanisms underlying status epilepticus in mitochondrial diseases.
  • To compare clinicopathologic findings in MELAS (mtDNA defect) and POLG (nuclear gene mutation) disorders.
  • To elucidate the role of energy failure in cortical damage and seizures.

Main Methods:

  • Comparative analysis of MELAS and POLG mitochondrial diseases.
  • Antemortem magnetic resonance imaging (MRI) studies.
  • Postmortem examination of affected tissues.

Main Results:

  • Both MELAS and POLG disorders exhibit similar clinicopathologic features.
  • MRI and postmortem findings reveal cortical damage in affected individuals.
  • A common mechanism of energy failure is implicated in the observed cortical damage.

Conclusions:

  • Status epilepticus in MELAS and POLG disorders likely results from cortical damage.
  • Energy failure is a probable common pathway leading to cortical damage and seizures.
  • Understanding this mechanism may inform therapeutic strategies for mitochondrial diseases with neurological manifestations.