Core Viewpoint - Osteoarthritis is a common systemic joint disease characterized by degenerative changes in joint cartilage and secondary bone hyperplasia, significantly affecting the quality of life for the elderly population in China due to the aging demographic [1] Group 1: Disease Understanding - Osteoarthritis is often misunderstood as merely "joint wear" or "bone spurs," leading to either excessive anxiety about needing joint replacement or neglecting early symptoms and delaying treatment [1] Group 2: Expert Insights - Professor Li Ru, a leading expert in rheumatology and immunology from Peking University People's Hospital, will provide authoritative and practical guidance on joint health, covering topics from basic lifestyle management to surgical interventions [1][2] Group 3: Live Broadcast Information - The live session can be accessed by downloading the People's Good Doctor App and entering the "Famous Doctor Live" section [3] - Additional health education content can be found by following the People's Health public WeChat account and downloading the People's Good Doctor App [4]

Core Insights - The article discusses the potential of circular RNA (circRNA) as a next-generation RNA therapy platform, highlighting its advantages over traditional mRNA therapies, particularly in stability, immunogenicity, and safety [2][4]. Group 1: CircRNA Advantages - CircRNA exhibits superior stability, immunogenicity, and safety compared to chemically modified mRNA and viral vector-based therapies [2]. - CircRNA can utilize internal ribosome entry site (IRES) sequences, eliminating the need for expensive 5' cap modifications and resulting in lower immunogenicity without chemical modifications [2]. Group 2: Research Findings - A study published in Nature Communications demonstrates that circRNA-based protein replacement therapy can alleviate osteoarthritis in male mice [3][4]. - Osteoarthritis (OA) is characterized by cartilage degradation and bone spur formation, with recent research indicating that the expression of Na v 1.7 in chondrocytes leads to cartilage degeneration and pain [6]. Group 3: Mechanism and Treatment Strategy - The study identifies that the downregulation of the RNA-binding protein Musashi2 (MSI2) in chondrocytes is a key factor in the pathogenesis of osteoarthritis [7]. - A local delivery strategy was developed to achieve high and sustained protein expression in chondrocytes, demonstrating that injecting ivcRNA encoding MSI2 effectively slows the progression of osteoarthritis in a mouse model [7][9].

Core Insights - The research reveals that metabolic factors, particularly gut health, play a significant role in the development of osteoarthritis, challenging the traditional view that it is primarily caused by local mechanical factors [1][2][3] - The study indicates a notable difference in gut microbiota composition and key metabolites between osteoarthritis patients and healthy individuals, suggesting a potential new direction for treatment [3][4] Group 1: Osteoarthritis Overview - Osteoarthritis is characterized by degeneration of joint cartilage and underlying bone, leading to pain, deformity, and functional impairment, significantly affecting patients' quality of life [2] - As of 2021, approximately 606 million people globally suffer from osteoarthritis, with around 152 million cases in China, reflecting a prevalence rate of 10.8% [2] Group 2: Research Findings - The research team conducted a large-scale study involving 4,080 community residents aged 50 and above, revealing a link between bile acid metabolism and osteoarthritis, influenced by gut microbiota [3][4] - A significant reduction in the abundance of specific gut bacteria (Bacteroides) was observed in osteoarthritis patients, correlating with abnormal bile acid metabolism [4][5] Group 3: Treatment Implications - The study suggests that supplementation with bile acids or GLP-1 analogs can significantly alleviate cartilage degeneration in osteoarthritis models, indicating a potential therapeutic pathway [5] - The findings highlight GLP-1 as a crucial mediator between gut health and joint protection, opening avenues for new treatment strategies [5] Group 4: Broader Implications of Gut Microbiota - Gut microbiota dysbiosis is linked to various diseases, including depression, diabetes, obesity, and cardiovascular diseases, emphasizing the importance of gut health in overall well-being [6][7] - The gut microbiome plays a critical role in immune regulation and systemic inflammation, with imbalances potentially leading to increased risks of autoimmune diseases and infections [7]