Stabilizing MARCH7 as a ferro-guardian against ferroptosis

Area of Science:

• Biochemistry
• Cell Biology
• Molecular Medicine

Background:

• Ferroptosis, an iron-dependent cell death, is implicated in various diseases.
• The precise mechanisms controlling iron overload to prevent ferroptosis are not fully understood.

Purpose of the Study:

• To identify critical regulators of intracellular iron homeostasis that suppress ferroptosis.
• To elucidate the molecular mechanisms by which these regulators function.

Main Methods:

• Multi-omics analysis to identify novel regulators.
• Biochemical assays to determine ubiquitination sites and degradation pathways.
• High-content screening to identify therapeutic compounds.

Main Results:

• The E3 ubiquitin ligase MARCH7 was identified as a dual suppressor of ferroptosis.
• MARCH7 targets NCOA4 for proteasomal degradation, reducing intracellular iron.
• MARCH7 restricts TFR1 translocation, inhibiting iron uptake.
• Emodinanthrone (EmodAn) was identified as a MARCH7 stabilizer with cardioprotective effects.

Conclusions:

• MARCH7 acts as a central hub in regulating iron homeostasis to prevent ferroptosis.
• MARCH7 stabilization is a potential therapeutic approach for ferroptosis- and iron-overload-related pathologies.