Nuclear receptor coactive 4-mediated ferritinophagy: a key role of heavy metals toxicity

Area of Science:

• Cellular Biology
• Toxicology
• Molecular Mechanisms

Background:

• Nuclear receptor coactivator 4 (NCOA4) is the primary receptor mediating ferritinophagy, the process of lysosomal degradation of ferritin.
• Ferritinophagy releases iron, and excessive iron can cause cellular redox imbalance, leading to ferroptosis, a form of programmed cell death.
• NCOA4 activity is precisely controlled through multiple regulatory layers, including transcriptional, post-transcriptional, translational, and post-translational modifications.

Purpose of the Study:

• To comprehensively review the regulatory mechanisms of NCOA4 in ferritinophagy.
• To elucidate the critical role of NCOA4-mediated ferritinophagy and ferroptosis in the context of heavy metal toxicity.
• To highlight the therapeutic potential of targeting NCOA4 for mitigating heavy metal-induced cellular damage.

Main Methods:

• Literature review of existing studies on NCOA4, ferritinophagy, ferroptosis, and heavy metal toxicity.
• Analysis of regulatory pathways governing NCOA4 function.
• Synthesis of evidence linking ferritinophagy and ferroptosis to heavy metal-induced pathology.

Main Results:

• NCOA4 acts as the sole receptor for selective ferritinophagy, controlling iron release from ferritin.
• Dysregulation of NCOA4-mediated ferritinophagy contributes to iron overload and ferroptosis.
• Emerging evidence strongly implicates ferritinophagy and ferroptosis in the pathogenesis of heavy metal toxicity.

Conclusions:

• NCOA4 is a key regulator of cellular iron homeostasis through ferritinophagy.
• Targeting NCOA4-mediated ferritinophagy presents a promising therapeutic strategy for heavy metal toxicity.
• Further research into NCOA4 regulation and its role in metal toxicity is warranted.