Perspectives on Osteoarthritis Treatment with Mesenchymal Stem Cells and Radix Achyranthis Bidentatae

Mechanisms and challenges of mesenchymal stem cells in the treatment of knee osteoarthritis

In this editorial, we comment on the recent article by Xiao et al, focusing on their investigation into whether the therapeutic efficacy of serum-free human umbilical cord mesenchymal stem cells (MSCs) differs from that of serum-containing human umbilical cord MSCs in a mouse model of knee osteoarthritis (OA). The incidence of OA has significantly increased in recent years, primarily owing to sports-related injuries or degenerative diseases. However, the regenerative capacity of articular cartilage remains limited, necessitating artificial joint replacement for patients with advanced OA to enhance the quality of life. MSCs have been widely used in the clinical treatment of OA owing to their multidirectional differentiation potential and immunomodulatory effects. The focus of this paper lies in elucidating the mechanism underlying MSC transplantation for the treatment of knee OA, while also addressing the challenges encountered in MSC therapy and outlining future directions.

Multiple Intra-Articular Injections of Adipose-Derived Mesenchymal Stem Cells for Canine Osteoarthritis Treatment

Osteoarthritis (OA) is one of the most common degenerative diseases in dogs and humans, which can lead to articular cartilage deterioration, chronic pain, and decreased quality of life. The anti-inflammatory, anti-fibrotic, analgesic, and cartilage regeneration properties of mesenchymal stem cell (MSC) therapy provide a new direction for the treatment development of OA in the future. Currently, MSC therapy lacks confirmed ideal sources, dosages, formulations, and specific characteristics. In this study, we evaluated the efficacy of multiple canine adipose-derived mesenchymal stem cell (ADSC) injections on anti-inflammation and joint cartilage damage in a canine OA model. Considering animal ethics, we simulated the effects of inflammation and cartilage repair during treatment through a mouse OA model. In the mouse OA model, through the detection of cartilage repair and inflammation-related key factors via histology and molecular biology, it was found that MSC therapy has a certain repair effect on cartilage, but the anti-inflammatory effect is time-dependent. In the canine OA model, we verified the feasibility of multiple injections of ADSCs. Compared with the control group, the cartilage repair effect of the treatment group was obvious, and the inflammatory factors decreased, showing an obvious therapeutic effect. This study demonstrates that multiple intra-articular injections of canine ADSCs could be effective in treating OA symptoms.

Advancing Neurological Health: Insights into Aging, Immunity, and Vascular Dynamics

This editorial provides an overview of recent advancements in the understanding and treatment of neurological disorders, focusing on aging, immunity, and blood flow, as featured in this special issue. The first section explores the importance of identifying biomarkers of aging and aging-related diseases, such as Alzheimer's Disease, highlighting the emerging role of saliva-based biomarkers and the gut-brain axis in disease diagnosis and management. In the subsequent section, the dysregulated immune systems associated with aging are discussed, emphasizing the intricate landscape of the immune system during aging and its bidirectional relationship with neuroinflammation. Additionally, insights into the involvement of Myeloid-Derived Suppressor Cells (MDSCs) in Multiple Sclerosis (MS) pathogenesis are presented. The third section examines the role of microglia in neuroinflammation and various neurological diseases, including age-related macular degeneration (AMD) and Tuberculous Meningitis (TBM). Furthermore, the therapeutic potential of stem cell and extracellular vesicle-based therapies for stroke is explored, along with molecular mechanism of how inflammation regulates cerebral and myocardial ischemia. Finally, the importance of blood flow in maintaining vascular health and its impact on neurological disorders are discussed, highlighting the potential of novel assessment methods for optimizing patient care. Overall, this special issue offers valuable insights into the complex mechanisms underlying neurological disorders and identifies potential avenues for therapeutic intervention.

Cyaonoside A-loaded composite hydrogel microspheres to treat osteoarthritis by relieving chondrocyte inflammation

Cyaonoside A (CyA), derived from the natural Chinese medicine, Cyathula officinalis Kuan, which was for a long time used to treat knee injuries and relieve joint pain in traditional Chinese medicine, showed an unclear mechanism for protecting cartilage. In addition, CyA was poorly hydrosoluble and incapable of being injected directly into the joint cavity, which limited its clinical application. This study reveals that CyA resisted IL-1β-mediated chondrogenic inflammation and apoptosis. Next, transcriptome sequencing is used to explore the potential mechanisms underlying CyA regulation of MSC chondrogenic differentiation. Based on these findings, CyA-loaded composite hydrogel microspheres (HLC) were developed and they possessed satisfactory loading efficiency, a suitable degradation rate and good biocompatibility. HLC increased chondrogenic anabolic gene (Acan, COL2A, and SOX9) expression, while downregulating the expression of the catabolic marker MMP13 in vitro. In the osteoarthritis mouse model, HLC demonstrated promising therapeutic capabilities by protecting the integrity of articular cartilage. In conclusion, this study provides insights into the regulatory mechanisms of CyA for chondrocytes and proposes a composite hydrogel microsphere-based advanced therapeutic strategy for osteoarthritis.