The role of autophagy in mitigating osteoarthritis progression via regulation of chondrocyte apoptosis: A review - 30/04/24
, Amirah Zulkifli a, Shaliny Krishnan a, Hui Yin Nam a, c, Tunku Kamarul a, dGraphical abstract |
Highlights |
• | Maintaining chondrocytes viability is crucial for normal cartilage homeostasis. |
• | Chondrocyte apoptosis perpetually stimulates cartilage loss in osteoarthritis. |
• | Cellular stresses and inflammation could trigger chondrocyte apoptosis. |
• | Decline in autophagy is associated with increased chondrocyte apoptosis in OA. |
• | Autophagy inhibits pro-apoptotic events, thus ameliorates cartilage degradation. |
Abstract |
Osteoarthritis (OA) is the most prevalent chronic joint disease with an immense socioeconomic burden; however, no treatment has achieved complete success in effectively halting or reversing cartilage degradation, which is the central pathophysiological feature of OA. Chondrocytes loss or dysfunction is a significant contributing factor to the progressive cartilage deterioration as these sole resident cells have a crucial role to produce extracellular matrix proteins, thus maintaining cartilage structure and homeostasis. It has been previously suggested that death of chondrocytes occurring through apoptosis substantially contributes to cartilage degeneration. Although the occurrence of apoptosis in osteoarthritic cartilage and its correlation with cartilage degradation is evident, the causes of chondrocyte apoptosis leading to matrix loss are still not well-understood. Autophagy, an intracellular degradative mechanism that eliminates dysfunctional cytoplasmic components to aid cell survival in unfavourable conditions, is a potential therapeutic target to inhibit chondrocyte apoptosis and reduce OA severity. Despite accumulating evidence indicating significant cytoprotective effects of autophagy against chondrocyte apoptosis, the mechanistic link between autophagy and apoptosis in chondrocytes remains to be further explored. In this review, we summarize the relevant mechanistic events that perpetuate chondrocyte apoptosis and highlight the prominent role of autophagy in modulating these events to mitigate OA progression.
Il testo completo di questo articolo è disponibile in PDF.Keywords : Cell death, Cartilage, Aging, Mitochondria, Endoplasmic reticulum stress, Inflammation
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Vol 91 - N° 3
Articolo 105642- maggio 2024 Ritorno al numeroBenvenuto su EM|consulte, il riferimento dei professionisti della salute.
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