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Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing
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Mitochondrial disorders.

Shibani Kanungo1, Jacob Morton1, Mekala Neelakantan1

  • 1Department of Pediatric and Adolescent Medicine, Western Michigan University Homer Stryker MD School of Medicine, Kalamazoo, Michigan, USA.

Annals of Translational Medicine
|February 12, 2019
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Summary
This summary is machine-generated.

Primary mitochondrial disorders are complex genetic conditions affecting cellular energy, leading to diverse symptoms across organ systems. Diagnosis remains challenging, and while cures are lacking, clinical trials are underway for new therapies.

Keywords:
Mitochondriaenergy metabolismheteroplasmymtDNAnDNA

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Area of Science:

  • Biochemistry
  • Genetics
  • Cell Biology

Background:

  • Primary mitochondrial disorders are heterogeneous inborn errors of metabolism (IEMs) impacting cellular energy production.
  • These disorders affect multiple organ systems, presenting with a wide range of clinical symptoms and variable inheritance patterns.
  • Mitochondria, crucial for cellular energy, contain their own DNA (mtDNA) and are influenced by nuclear DNA (nDNA) genes.

Purpose of the Study:

  • To provide an overview of primary mitochondrial disorders, highlighting their complexity, genetic basis, and clinical variability.
  • To underscore the diagnostic challenges associated with these conditions due to unique mitochondrial genetics.
  • To inform about the current therapeutic landscape and ongoing clinical trials.

Main Methods:

  • Literature review and synthesis of existing knowledge on primary mitochondrial disorders.
  • Analysis of clinical presentations, genetic etiologies, and inheritance patterns.
  • Summary of diagnostic complexities and current therapeutic approaches.

Main Results:

  • Primary mitochondrial disorders are characterized by significant clinical heterogeneity and multi-systemic involvement.
  • Genetic causes are diverse, involving both mitochondrial DNA (mtDNA) and nuclear DNA (nDNA) encoded genes, with various inheritance modes.
  • Diagnosis can be elusive, and effective cures are not yet available, though treatments are being investigated.

Conclusions:

  • Primary mitochondrial disorders represent a complex group of IEMs with substantial diagnostic and therapeutic challenges.
  • Understanding the intricate genetics and varied clinical phenotypes is crucial for managing these conditions.
  • Ongoing international clinical trials offer hope for future FDA-approved therapies and improved patient outcomes.