Update of Photodynamic Therapy and Sonodynamic Therapy in Treating Rheumatoid Arthritis

Rheumatoid arthritis (RA) stands as a prevalent chronic autoimmune condition globally. Although conventional disease-modifying antirheumatic drugs (DMARDs) offer relief from systemic inflammation, they frequently entail undesirable side effects. Phototherapy, encompassing both photodynamic therapy (PDT) and sonodynamic therapy (SDT), employs light and low-frequency ultrasound irradiation to generate reactive oxygen species (ROS), thereby inducing apoptosis in RA inflammatory cells and reducing cytokine expression. This approach presents a promising alternative for RA management. Recently, a range of nanomaterials that induce PDT or SDT have been developed, yielding promising outcomes in arthritis suppression. This review outlines the latest advancements in PDT/SDT-based nanomedicine for RA treatment.