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Updated: Aug 11, 2026
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Assessing Mitochondrial Function in Sciatic Nerve by High-Resolution Respirometry
Published on: May 5, 2022
Peripheral neuropathy in genetic mitochondrial diseases
David E Stickler1, Edward Valenstein, Richard E Neiberger
1Department of Neurology, University of Florida, Gainesville, Florida, USA. stickle@musc.edu
Pediatric Neurology
|February 7, 2006
Summary
Peripheral neuropathy is common in genetic mitochondrial disorders. Nerve conduction studies revealed reduced motor nerve conduction velocity in patients with congenital lactic acidosis, suggesting cellular energy failure.
Area of Science:
- Neurology
- Genetics
- Metabolic Disorders
Background:
- Peripheral neuropathy is a frequent complication of genetic mitochondrial diseases.
- Congenital lactic acidosis is a group of inherited metabolic disorders affecting mitochondria.
- Understanding the electrophysiological characteristics of neuropathy in these disorders is crucial.
Purpose of the Study:
- To investigate the frequency and clinical presentation of peripheral neuropathy in subjects with congenital lactic acidosis.
- To identify electrophysiological abnormalities associated with genetic mitochondrial disorders.
Main Methods:
- Nerve conduction studies (motor and sensory) were performed on 43 subjects with congenital lactic acidosis.
- Data were compared to healthy literature control subjects.
Main Results:
- Subjects showed significantly lower mean peroneal motor nerve amplitude and lower median and peroneal motor nerve conduction velocities compared to controls.
- No significant differences were observed in sensory nerve conduction studies.
- Reduced motor nerve conduction velocity was the primary electrophysiological finding, irrespective of age, sex, or specific mitochondrial disorder.
Conclusions:
- A generalized reduction in motor nerve conduction velocity is a dominant electrophysiological abnormality in patients with genetic mitochondrial diseases.
- Cellular energy failure, due to high ATP demand in nerve tissue, is the likely cause of peripheral neuropathy in these conditions.
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