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Related Concept Videos

Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
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Related Experiment Video

Updated: May 30, 2026

Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools
05:27

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Published on: July 20, 2022

Coenzyme Q deficiency in muscle.

Eva Trevisson1, Salvatore DiMauro, Placido Navas

  • 1Clinical Genetics Unit, Department of Pediatrics, University of Padova, Italy.

Current Opinion in Neurology
|August 17, 2011
PubMed
Summary

Coenzyme Q (CoQ) deficiency can cause various symptoms, particularly in skeletal muscles. Early diagnosis and treatment are crucial for managing this condition and preventing permanent damage.

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Area of Science:

  • Biochemistry
  • Genetics
  • Mitochondrial Biology

Background:

  • Coenzyme Q (CoQ) is essential for mitochondrial respiration.
  • CoQ deficiency presents with diverse clinical phenotypes, frequently impacting skeletal muscle.
  • CoQ supplementation often improves symptoms in affected patients.

Purpose of the Study:

  • To review recent advancements in Coenzyme Q deficiency.
  • To focus on the involvement of skeletal muscle in CoQ deficiency.
  • To discuss the genetic basis and clinical manifestations of CoQ deficiency.

Main Methods:

  • Literature review of recent studies on CoQ deficiency.
  • Analysis of genetic defects associated with CoQ deficiency.
  • Correlation of clinical phenotypes with genetic findings.

Main Results:

  • Primary CoQ deficiency arises from mutations in CoQ biosynthesis genes.
  • Secondary CoQ deficiency involves mutations in unrelated genes or non-genetic factors.
  • Myopathic phenotypes are more commonly linked to secondary CoQ deficiency or other genetic defects, not primary CoQ biosynthesis issues.
  • Many CoQ deficiency cases lack a genetic diagnosis.
  • Pathogenesis may involve CoQ's antioxidant and pyrimidine metabolism roles beyond bioenergetics.

Conclusions:

  • Prompt identification of CoQ deficiency is vital for effective treatment.
  • Timely intervention can prevent irreversible tissue damage.
  • Understanding the multifaceted roles of CoQ is key to managing deficiency.