Pathological variants in nuclear genes causing mitochondrial complex III deficiency: An update

Area of Science:

• Genetics
• Biochemistry
• Metabolic Disorders

Background:

• Mitochondrial disorders are heterogeneous genetic diseases stemming from inborn errors of metabolism.
• Primary mitochondrial diseases often involve defects in the oxidative phosphorylation system (complexes I-V).
• Complex III deficiencies represent the least common group within these mitochondrial disorders.

Purpose of the Study:

• To review the current understanding of the genetic basis of complex III deficiency.
• To summarize the primary clinical features associated with complex III deficiencies.
• To highlight recent advancements in identifying genetic variants and understanding complex III biogenesis.

Main Methods:

• Literature review of recent studies on complex III deficiency.
• Analysis of genetic data from next-generation sequencing techniques.
• Compilation of clinical data associated with identified genetic variants.

Main Results:

• Significant expansion in the identification of pathological variants in nuclear genes causing complex III deficiency.
• Improved knowledge regarding the biogenesis of complex III.
• Enhanced clinical diagnostic capabilities for these rare disorders.

Conclusions:

• Genetic factors play a crucial role in complex III deficiency.
• Next-generation sequencing is vital for diagnosing these rare mitochondrial diseases.
• Further research into complex III biogenesis and clinical features is ongoing.