Difficulties of biological therapy in the patient with active rheumatoid arthritis and secondary renal amyloidosis: A report of clinical case [Трудности генно-инженерной биологической терапии у пациента с активным ревматоидным артритом и вторичным амилоидозом с поражением почек (описание клинического случая)]

A clinical case of a patient with active rheumatoid arthritis (RA) resistant to standard basic therapy is presented, which served as the reason for the appointment of the target drug – Janus kinase, tofacitinib (Jaquinus) and then biological therapy using anti-IL6 receptor antibody tocilizumab (Actemra). This clinical example demonstrates the patient with the presence of several complications, both the course of the disease – amyloid nephropathy with the development of nephrotic syndrome (NS) as a manifestation of secondary amyloidosis with kidney damage, as well as basic therapy – the presence of comorbid infections with hospital pneumonia and infectious (septic) knee arthritis. An additional contribution of NS to the development of infectious complications in patients with RA receiving immunosuppressive therapy is supposed. Current treatment options for resistant RA and the feasibility of early use of biologics before the development of irreversible complications, as well as the difficulties of therapy and the complications associated with immunosuppression are discussed. Preventive measures for immunization with the anti-pneumococcal vaccine and the need to correct hemostatic disorders in patients with RA and NS are important. © 2021 Ima-Press Publishing House. All rights reserved.