NARFL Knockout Triggers Ferroptosis-Driven Vascular Endothelial Dysfunction

Area of Science:

• Biochemistry
• Molecular Biology
• Pathophysiology

Background:

• Nuclear prelamin A recognition factor-like (NARFL) is essential for cytosolic iron-sulfur (Fe-S) protein assembly (CIA).
• The role of NARFL in vascular pathophysiology is largely unknown.
• Iron-sulfur proteins are critical for numerous cellular processes.

Purpose of the Study:

• To investigate the role of NARFL in vascular endothelial function and pathophysiology.
• To elucidate the molecular mechanisms by which NARFL deficiency affects vascular health.
• To explore the clinical relevance of NARFL in vascular diseases.

Main Methods:

• Gene knockout studies in zebrafish (narfl) and mice (Ciao3).
• Analysis of Fe-S protein assembly, cellular iron metabolism, oxidative stress, and lipid peroxidation.
• Assessment of endothelial cell function and ferroptosis.
• Investigation of NARFL polymorphisms in human vascular disorders.

Main Results:

• NARFL deficiency in zebrafish and mice leads to embryonic lethality due to severe vascular defects.
• NARFL loss impairs Fe-S cluster transfer, causing iron overload, oxidative stress, and ferroptosis in endothelial cells.
• This mechanism is conserved in human endothelial cells and linked to vascular diseases via NARFL polymorphisms.

Conclusions:

• NARFL is crucial for maintaining endothelial health by regulating Fe-S protein assembly and preventing ferroptosis.
• A novel CIA-ferroptosis-vascular axis is identified, with NARFL as a key regulator.
• NARFL represents a potential therapeutic target for vascular endothelial disorders.