Abstract
Autoimmune diseases are chronic, debilitating conditions caused by the immune system mistakenly attacking healthy tissues. Conventional treatments mainly involve broad immunosuppression, which is associated with significant side effects, limited specificity, and suboptimal long-term outcomes. For instance, continuing to take corticosteroids can result in a number of serious dose-linked toxicities, such as osteoporosis, hypertension, and a markedly increased susceptibility to infection, whereas methotrexate, even at therapeutic doses, can still cause liver damage and bone marrow suppression. This review aims to explore recent advances in nanotechnology-based therapies for autoimmune diseases, focusing on their mechanisms, therapeutic applications, and potential for clinical translation. A comprehensive review of peer-reviewed literature was conducted to examine various nanotechnology platforms, including drug-loaded nanoparticles, antigen-specific nanomedicines, RNA interference (siRNA), CRISPR-enabled systems, and stimuli-responsive nanocarriers. For instance, methotrexate-loaded polymeric nanoparticles dramatically decreased arthritis severity in preclinical rheumatoid arthritis rodents, whereas PLGA nanoparticles containing gluten protein induced immunological tolerance in a clinical study for celiac disease. Nanomedicine offers several advantages over traditional therapies, including targeted drug delivery, enhanced bioavailability, reduced systemic toxicity, and the potential to induce immune tolerance. Notable innovations include biodegradable polymeric nanoparticles, liposomes, micelles, exosome-mimetic nanoparticles, and magnetic nanomaterials. Emerging technologies, such as CRISPR-Cas9 and RNAi, delivered via nanoparticles, are advancing immune modulation in autoimmune models. Despite promising outcomes, several barriers remain, including concerns about toxicity, scale-up manufacturing issues, and regulatory challenges. Nanotechnology is redefining autoimmune disease therapy by shifting from non-specific immunosuppression to precision-targeted approaches. Future progress lies in integrating nanomedicine with personalized medicine to tailor treatments based on individual immune profiles. Continued interdisciplinary collaboration and regulatory alignment are essential to translating these innovations into clinical practice.