C19orf12 ablation causes ferroptosis in mitochondrial membrane protein-associated with neurodegeneration

Area of Science:

• Neuroscience
• Genetics
• Cell Biology

Background:

• Mitochondrial membrane protein-associated with neurodegeneration (MPAN) is a rare genetic disorder.
• MPAN is characterized by severe neurodegeneration and excessive iron buildup in the brain.
• The precise mechanisms underlying MPAN pathogenesis remain unclear, despite links to C19orf12 gene defects.

Purpose of the Study:

• To investigate the role of C19orf12 in MPAN pathogenesis using cellular and patient-derived models.
• To explore the involvement of iron overload and ferroptosis in MPAN.
• To identify potential therapeutic strategies for MPAN.

Main Methods:

• Utilized C19orf12 knockout (KO) M17 neuronal cells and MPAN patient-derived fibroblasts.
• Assessed mitochondrial function, iron levels, and oxidative stress markers.
• Induced and evaluated ferroptosis using specific chemical agents and iron chelators.
• Examined cortical neurons from an MPAN patient biopsy.

Main Results:

• C19orf12 KO and MPAN cells exhibited mitochondrial fragmentation, dysfunction, iron overload, and oxidative damage.
• Antioxidant (NAC) and iron chelator (DFO) treatments ameliorated oxidative stress and mitochondrial deficits.
• MPAN models showed increased susceptibility to ferroptosis, preventable by DFO.
• MPAN patient cortical neurons displayed mitochondrial fragmentation and ferroptosis-related damage.

Conclusions:

• Iron overload and ferroptosis are implicated in the pathogenesis of MPAN.
• C19orf12 dysfunction contributes to mitochondrial deficits and oxidative stress.
• Targeting iron accumulation and ferroptosis may offer therapeutic benefits for MPAN patients.