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Related Experiment Videos

Genotypes from patients indicate no paternal mitochondrial DNA contribution.

Robert W Taylor1, Martina T McDonnell, Emma L Blakely

  • 1School of Neurology, Neurobiology and Psychiatry, The Medical School, University of Newcastle upon Tyne, Newcastle upon Tyne, United Kingdom.

Annals of Neurology
|October 2, 2003
PubMed
Summary

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Paternal transmission of mitochondrial DNA (mtDNA) is rare, despite a case of mitochondrial myopathy. This study found no evidence of paternal mtDNA in patients, reinforcing genetic counseling regarding maternal inheritance.

Area of Science:

  • Mitochondrial genetics
  • Human genetics

Background:

  • Mitochondrial DNA (mtDNA) is typically maternally inherited.
  • A recent case suggested paternal mtDNA transmission in mitochondrial myopathy.

Purpose of the Study:

  • To investigate the frequency of paternal mtDNA transmission in sporadic mitochondrial myopathies.
  • To determine if the observed paternal transmission was a common phenomenon.

Main Methods:

  • Studied mtDNA sequence variation between muscle and blood tissues.
  • Analyzed samples from 35 patients with sporadic mitochondrial myopathies.

Main Results:

  • No evidence of paternal mtDNA transmission was detected in any of the 35 patients.
  • mtDNA sequence variation between muscle and blood tissues was consistent with maternal inheritance.

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Conclusions:

  • Paternal transmission of mtDNA is a rare event.
  • The findings support current genetic counseling practices emphasizing maternal inheritance of mtDNA.