Mechanisms controlling cellular and systemic iron homeostasis.

Area of Science:

• Cellular Biology
• Biochemistry
• Physiology

Background:

• Iron is crucial for hundreds of mammalian proteins involved in respiration, gene regulation, and DNA synthesis.
• Cellular and systemic iron levels are tightly controlled to ensure sufficient supply while preventing oxidative damage and ferroptosis.

Purpose of the Study:

• To review cellular iron acquisition, trafficking, export, and storage mobilization.
• To elucidate the regulatory systems fine-tuning cellular iron homeostasis.
• To explore interactions between cellular and systemic iron regulation.

Main Methods:

• Literature review of cellular iron metabolism and regulatory pathways.
• Discussion of key regulatory networks including IRP-IRE, NCOA4-ferritinophagy, PHD-HIF, and NRF2.
• Analysis of the hepcidin-ferroportin axis in systemic iron control.

Main Results:

• Cells acquire, traffic, and export iron through complex mechanisms.
• Stored iron is mobilized for vital processes like iron-sulfur cluster and haem synthesis.
• Multiple regulatory systems (IRP-IRE, NCOA4, PHD-HIF, NRF2) and the hepcidin-ferroportin axis coordinate iron homeostasis.

Conclusions:

• Understanding cellular and systemic iron regulation is vital for managing iron-related diseases.
• This knowledge can guide the development of novel therapeutic strategies for iron mismanagement disorders.