Mutation of NDUFAF2 Linked to Mitochondrial Complex I Deficiency

Area of Science:

• Genetics
• Biochemistry
• Neurology

Background:

• Mitochondrial complex I deficiency is an autosomal recessive disorder.
• It results from mutations affecting NADH: ubiquinone oxidoreductase, crucial for cellular respiration.
• The condition presents with diverse neurological and systemic symptoms.

Observation:

• A patient exhibited severe, progressive neurological decline starting at six months.
• Symptoms included developmental delay, metabolic acidosis, abnormal movements, and elevated lactate.
• A novel mutation (c.127G>A) in the NDUFAF2 gene was identified.

Findings:

• Exome sequencing successfully identified a new mutation in NDUFAF2.
• This mutation is associated with mitochondrial complex I deficiency.
• The findings broaden the spectrum of genetic mutations causing this rare disease.

Implications:

• Exome sequencing is a valuable tool for diagnosing complex genetic disorders like mitochondrial diseases.
• Mitochondrial complex I deficiency should be considered in patients with central hypoventilation.
• This case expands the understanding of NDUFAF2 mutations and their clinical impact.