Journal
IMMUNITY
Volume 44, Issue 3, Pages 492-504Publisher
CELL PRESS
DOI: 10.1016/j.immuni.2016.02.016
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Funding
- Fundacao Calouste Gulbenkian
- Fundacao para a Ciencia e Tecnologia [PTDC/SAU TOX/116627/2010, HMSP-ICT/0022/2010]
- European Community [ERC-2011-AdG 294709-DAMAGECONTROL]
- US National Institutes of Health
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Iron is a transition metal that due to its inherent ability to exchange electrons with a variety of molecules is essential to support life. In mammals, iron exists mostly in the form of heme, enclosed within an organic protoporphyrin ring and functioning primarily as a prosthetic group in proteins. Paradoxically, free iron also has the potential to become cytotoxic when electron exchange with oxygen is unrestricted and catalyzes the production of reactive oxygen species. These biological properties demand that iron metabolism is tightly regulated such that iron is available for core biological functions while preventing its cytotoxic effects. Macrophages play a central role in establishing this delicate balance. Here, we review the impact of macrophages on heme-iron metabolism and, reciprocally, how heme-iron modulates macrophage function.
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