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The role of ferroptosis in osteoarthritis: Progress and prospects
Weibei Sheng1, Shuai Liao2, Deli Wang1
1Department of Bone & Joint Surgery, National & Local Joint Engineering Research Center of Orthopaedic Biomaterials, Shenzhen Key Laboratory of Orthopaedic Diseases and Biomaterials Research, Peking University Shenzhen Hospital, Shenzhen, 518036, China.
Abstract:
Osteoarthritis (OA) is the most prevalent degenerative joint disease, marked by cartilage degeneration, synovitis, and subchondral bone changes. The absence of effective drugs and treatments to decelerate OA's progression highlights a significant gap in clinical practice. Ferroptosis, an iron-dependent cell death driven by lipid peroxidation, has emerged as a research focus in osteoarthritic chondrocytes. This form of cell death is characterized by imbalances in iron and increased lipid peroxidation within osteoarthritic chondrocytes. Key antioxidant mechanisms, such as Glutathione Peroxidase 4 (GPX4) and the Nuclear Factor Erythroid 2-Related Factor 2 (NRF2) pathway, are vital in countering ferroptosis in osteoarthritic chondrocytes. This review collates recent findings on ferroptosis in osteoarthritic chondrocytes, emphasizing iron regulation, lipid peroxidation, and antioxidative responses. It also explores emerging therapeutics aimed at mitigating OA by targeting ferroptosis in chondrocytes.
Insights
Osteoarthritis (OA) involves cartilage breakdown and lacks effective treatments. Targeting ferroptosis, a cell death pathway linked to iron and lipid peroxidation in chondrocytes, offers a promising therapeutic strategy for OA.
Area of Science:
- Biomedical Science
- Cell Biology
- Orthopedics
Background:
- Osteoarthritis (OA) is a widespread degenerative joint disease characterized by cartilage degradation.
- Current treatments for OA are limited in their ability to slow disease progression.
- Ferroptosis, a form of regulated cell death driven by iron and lipid peroxidation, is implicated in OA pathogenesis.
Purpose of the Study:
- To review the role of ferroptosis in osteoarthritic chondrocytes.
- To highlight the mechanisms of iron regulation and lipid peroxidation in OA.
- To explore novel therapeutic strategies targeting ferroptosis for OA treatment.
Main Methods:
- Literature review of recent findings on ferroptosis in OA.
- Analysis of the involvement of iron metabolism and lipid peroxidation in chondrocytes.
- Examination of antioxidant pathways like GPX4 and NRF2 in OA chondrocytes.
Main Results:
- Ferroptosis, characterized by iron dysregulation and lipid peroxidation, occurs in osteoarthritic chondrocytes.
- Antioxidant systems, including GPX4 and the NRF2 pathway, play a crucial role in mitigating ferroptosis.
- Imbalances in these pathways contribute to OA progression.
Conclusions:
- Ferroptosis is a key cellular mechanism in osteoarthritis.
- Targeting ferroptosis pathways presents a potential new avenue for OA therapeutics.
- Further research into iron regulation and antioxidant defenses in chondrocytes is warranted.
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