4.7 Review

Iron homeostasis in arthropathies: From pathogenesis to therapeutic potential

Journal

AGEING RESEARCH REVIEWS
Volume 72, Issue -, Pages -

Publisher

ELSEVIER IRELAND LTD
DOI: 10.1016/j.arr.2021.101481

Keywords

Arthropathy; Osteoarthritis; Chondrocyte; Iron homeostasis; Reactive oxygen species; Ferroptosis

Funding

  1. National Natural Science Foundation of China [81874020, 82072556]

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Iron is essential for cell functioning within mammalian organ systems, but excess iron can lead to oxidative stress damage. Patients with joint diseases often have excess iron content, which is closely associated with various pathological changes. Maintaining iron homeostasis is emphasized for potential therapeutic benefits in these arthropathies.
Iron is an essential element for proper functioning of cells within mammalian organ systems; in particular, iron homeostasis is critical for joint health. Excess iron can induce oxidative stress damage, associated with the pathogenesis of iron-storage and ageing-related diseases. Therefore, iron levels in body tissues and cells must be tightly regulated. In the past decades, excess iron content within joints has been found in some patients with joint diseases including hemophilic arthropathy, hemochromatosis arthropathy, and osteoarthritis (OA). Currently, increased evidence has shown that iron accumulation is closely associated with multiple pathological changes of these arthropathies. This review summarizes system-level and intracellular regulation of iron homeostasis, and emphasizes the role of iron in synovial alterations, cartilage degeneration, and subchondral bone of several arthropathies. Of note, we discuss the potential link between iron homeostasis and OA pathogenesis. Finally, we discuss the therapeutic potential of maintaining iron homeostasis in these arthropathies.

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