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  • Title: Antigen-Drug Conjugates as a Novel Therapeutic Class for the Treatment of Antigen-Specific Autoimmune Disorders.
    Author: Pickens CJ, Christopher MA, Leon MA, Pressnall MM, Johnson SN, Thati S, Sullivan BP, Berkland C.
    Journal: Mol Pharm; 2019 Jun 03; 16(6):2452-2461. PubMed ID: 31083955.
    Abstract:
    Multiple sclerosis represents the world's most common cause of neurological disability in young people and is attributed to a loss of immune tolerance toward proteins of the myelin sheath. Typical treatment options for MS patients involve immunomodulatory drugs, which act nonspecifically, resulting in global immunosuppression. The study discussed herein aims to demonstrate the efficacy of antigen-specific immunotherapies involving the conjugation of disease causing autoantigen, PLP139-151, and a potent immunosuppressant, dexamethasone. Antigen-drug conjugates (AgDCs) were formed using copper-catalyzed azide-alkyne cycloaddition chemistry with the inclusion of a hydrolyzable linker to maintain the activity of released dexamethasone. Subcutaneous administration of this antigen-drug conjugates to SJL mice induced with experimental autoimmune encephalomyelitis, protected the mice from a symptom onset throughout the 25 day study, demonstrating enhanced efficacy in comparison to dexamethasone treatment. These results highlight the benefits of co-delivery of autoantigens with immunosuppressant drugs as AgDCs for the treatment of autoimmune diseases.
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