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Published on: January 7, 2019
Potential Methods of Targeting Cellular Aging Hallmarks to Reverse Osteoarthritic Phenotype of Chondrocytes
Yuchen He1,2, Katelyn E Lipa1,3, Peter G Alexander1,4
1Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA 15217, USA.
Abstract:
Osteoarthritis (OA) is a chronic degenerative joint disease that causes pain, physical disability, and life quality impairment. The pathophysiology of OA remains largely unclear, and currently no FDA-approved disease-modifying OA drugs (DMOADs) are available. As has been acknowledged, aging is the primary independent risk factor for OA, but the mechanisms underlying such a connection are not fully understood. In this review, we first revisit the changes in OA chondrocytes from the perspective of cellular hallmarks of aging. It is concluded that OA chondrocytes share many alterations similar to cellular aging. Next, based on the findings from studies on other cell types and diseases, we propose methods that can potentially reverse osteoarthritic phenotype of chondrocytes back to a healthier state. Lastly, current challenges and future perspectives are summarized.
Insights
Osteoarthritis (OA) chondrocytes exhibit hallmarks of cellular aging. This review explores potential strategies to reverse the osteoarthritic chondrocyte phenotype, offering hope for future osteoarthritis treatments.
Area of Science:
- Gerontology
- Rheumatology
- Cell Biology
Background:
- Osteoarthritis (OA) is a prevalent degenerative joint disease causing significant pain and disability.
- Current OA treatments lack disease-modifying capabilities, and the underlying mechanisms, particularly the link to aging, are not fully understood.
- Aging is the primary risk factor for OA, but the specific molecular and cellular connections remain elusive.
Purpose of the Study:
- To review cellular hallmarks of aging in osteoarthritis (OA) chondrocytes.
- To propose potential therapeutic strategies for reversing the osteoarthritic chondrocyte phenotype.
- To summarize current challenges and future directions in OA research.
Main Methods:
- Review of existing literature on OA pathophysiology and cellular aging.
- Analysis of OA chondrocyte alterations through the lens of established hallmarks of aging.
- Synthesis of findings from studies on other cell types and diseases to propose therapeutic interventions.
Main Results:
- OA chondrocytes display numerous alterations consistent with cellular aging.
- The aging process significantly contributes to the development and progression of OA.
- Potential methods to rejuvenate OA chondrocytes and restore a healthier phenotype have been identified.
Conclusions:
- OA chondrocytes share key characteristics with senescent cells, highlighting the role of aging in OA.
- Therapeutic strategies targeting cellular aging may offer novel approaches for OA treatment.
- Further research is needed to validate these strategies and develop effective disease-modifying OA drugs (DMOADs).
