Antibody and aptamer-based therapies for osteoarthritis: Application of antibodies and promise of aptamers.

Osteoarthritis (OA) is a common degenerative inflammatory joint disease with progressive loss of articular cartilage that undermines patients' quality of life. There are no regulatory-approved, disease-modifying OA medications, despite a great deal of studies done to elucidate OA pathogenesis. Until now, OA pharmacological treatment focused mainly on generalized inhibition of inflammation and pain. Currently, monoclonal antibodies and nucleic-acid aptamers emerge as targeted therapies offering potential alternatives by addressing the complex challenges posed by OA, such as specifically reducing inflammation and pain in the joint targeting specific molecular key players, instead of a systemic and generalized approach like with non-steroidal anti-inflammatory drugs. Aptamers' properties, including structure versatility, reduced immunogenicity, and flexible administration methods, position them as high-potential candidates for OA treatment. This review summarizes results from clinical trials applying monoclonal antibodies to treat OA, preclinical research, and the development of aptamers as a new generation of targeting agents. Meanwhile, it provides a comprehensive comparison of the characteristics, advantages, and limitations of aptamers versus monoclonal antibodies. Notably, the promising applications of aptamers, demonstrated in other inflammatory and degenerative conditions, underscore their potential for OA therapy. We anticipate that the application of aptamer could offer a new way of OA pharmacological intervention.