The interplay between osteoarthritis and osteoporosis: Mechanisms, implications, and treatment considerations – A narrative review
Kai Huang, Haili Cai
Abstract
This comprehensive review examines the relationship between osteoarthritis (OA) and osteoporosis (OP), two common disorders in the elderly. OA involves joint cartilage degeneration and pain, while OP leads to fractures due to reduced bone mass. Despite different pathologies, both conditions share risk factors such as age and genetics. Studies reveal mixed results: some show higher bone mineral density (BMD) in OA patients, suggesting an inverse relationship, while others find no significant link. Proposed mechanisms include mechanical loading, bone remodeling, and inflammation. Clinical strategies focus on maintaining bone health in OA and monitoring joint health in OP, with treatments like bisphosphonates and exercise. Understanding these interactions is crucial for developing integrated treatments to improve patient outcomes and quality of life. Further research is needed to clarify these complex mechanisms. Interplay Between Osteoarthritis and Osteoporosis Mechanical Loading contributes to subchondral bone sclerosis in OA and affects trabecular bone loss in OP. Oxidative Stress impacts both articular cartilage degradation in OA and bone loss in OP. Chronic low-grade inflammation leads to cartilage damage in OA, while systemic inflammation promotes bone loss in OP. Osteopontin plays a role in both cartilage damage in OA and bone loss in OP. Gut microbiota, estrogen, SIRT1, and the vitamin D receptor exert protective effects against both diseases by influencing bone and cartilage metabolism. • Mechanisms linking OA and OP, such as mechanical loading and bone remodeling. • The role of inflammation and estrogen deficiency in the progression of both conditions. • Genetic factors influencing bone density and cartilage integrity. • The impact of gut microbiota on bone health and inflammation. • Potential therapeutic interventions, including pharmacological treatments and lifestyle modifications.