Pharmacotherapy of autoimmune rheumatic diseases – from monoclonal antibodies to CAR T cells: 20 years later

Autoimmunity is a pathological process associated with a violation of immunological tolerance to normal structural components of the body (autoantigens), associated with the predominance of active (adaptive) immunity and manifested by hyperproduction of autoantibodies. Systemic autoimmune rheumatic diseases (SARDs) are among the most common and severe nosological forms of this pathology associated with autoimmunity. Problems of pharmacotherapy of SARDs are the subject of intensive research. At the beginning of the 21st century, more than 20 biologic agents were developed for the treatment of rheumatoid arthritis – monoclonal antibodies (mAbs) and recombinant proteins that control inflammation associated with the overproduction of “pro-inflammatory” cytokines, the use of which has dramatically improved the results of pharmacotherapy. However, much less research has been devoted to studying the possibilities of pharmacotherapy aimed at selective suppression of the “autoimmune” component of the pathogenesis of SADRs associated with uncontrolled activation of B cells and restoration of immunological tolerance to autoantigens. In the spectrum of drugs whose mechanism of action is associated with the suppression of pathological activation of B cells, the leading place is occupied by rituximab (RTM). It is noteworthy that 20 years ago (2004), a group of researchers led by prof. J.C. Edwards first demonstrated the effectiveness of RTM in patients with RA, which was soon successfully repositioned to treat a wide range of SARDs. A major achievement in the pharmacotherapy of SARDs is associated with the use of CAR (сhimeric antigen receptor) T cell therapy, developed for the treatment of refractory hematological tumors. The main component of CART-cells is a genetically engineered T-cell receptor that recognizes the target antigen without the participation of the major histocompatibility complex. Although limited, extremely impressive data regarding high remission rates have been obtained by adapting CD19 CART-cell therapy to treat patients with severe systemic lupus erythematosus (SLE) and other SARDs refractory to standard immunosuppressive medications. The article discusses the results of the use of CART-cell therapy in SLE and other SARDs and prospects for further research.

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