Iron as a Central Player and Promising Target in Cancer Progression.
Jung M1, Mertens C2, Tomat E3, Brüne B4,5,6.
Int J Mol Sci. 2019 Jan 11;20(2). pii: E273. doi: 10.3390/ijms20020273.

Author information

Abstract
Iron is an essential element for virtually all organisms. On the one hand, it facilitates cell proliferation and growth. On the other hand, iron may be detrimental due to its redox abilities, thereby contributing to free radical formation, which in turn
may provoke oxidative stress and DNA damage. Iron also plays a crucial role in tumor progression and metastasis due to its major function in tumor cell survival and reprogramming of the tumor microenvironment. Therefore, pathways of iron acquisition,
export, and storage are often perturbed in cancers, suggesting that targeting iron metabolic pathways might represent opportunities towards innovative approaches in cancer treatment. Recent evidence points to a crucial role of tumor-associated
macrophages (TAMs) as a source of iron within the tumor microenvironment, implying that specifically targeting the TAM iron pool might add to the efficacy of tumor therapy. Here, we provide a brief summary of tumor cell iron metabolism and updated
molecular mechanisms that regulate cellular and systemic iron homeostasis with regard to the development of cancer. Since iron adds to shaping major hallmarks of cancer, we emphasize innovative therapeutic strategies to address the iron pool of tumor
cells or cells of the tumor microenvironment for the treatment of cancer.

KEYWORDS:
iron chelators; iron homeostasis; lipocalin-2; macrophage polarization; tumor progression

PMID: 30641920 PMCID: PMC6359419 DOI: 10.3390/ijms20020273


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