Novel C19orf12 loss-of-function variant leading to neurodegeneration with brain iron accumulation

Area of Science:

• Genetics
• Neurobiology
• Rare Diseases

Background:

• Neurodegeneration with brain iron accumulation (NBIA) comprises inherited disorders marked by excessive iron in the brain, particularly the basal ganglia.
• Mitochondrial membrane protein-associated neurodegeneration (MPAN) is a specific subtype of NBIA linked to mutations in the C19orf12 gene.

Observation:

• A case study of a Romanian patient diagnosed with MPAN.
• Exome sequencing identified a novel homozygous nonsense variant (c.215T>G, p.Leu72*) in the C19orf12 gene.
• This variant was confirmed to co-segregate with the disease in affected family members, who were heterozygous carriers.

Findings:

• Identification of a previously unreported, pathogenic C19orf12 variant responsible for MPAN.
• Confirmation of MPAN in a patient of Romanian ethnicity.
• Demonstration of the variant's inheritance pattern within the patient's family.

Implications:

• Expands the known spectrum of C19orf12 variants associated with MPAN.
• Highlights the importance of genetic diagnostics for rare neurodegenerative diseases.
• Provides a foundation for future research into MPAN pathogenesis and potential therapeutic targets in diverse populations.