The safety and optimal dosage of an interleukin-17A inhibitor (secukinumab) in the treatment of psoriatic arthritis in a patient with concomitant hepatitis C virus infection

Psoriatic arthritis (PsA) is a chronic inflammatory disease of the group of spondylitides, which is associated with psoriasis. The decisive role is played by the activation of the interleukin (IL)-23/IL-17 axis in the pathogenesis of PsA [1]. Secukinumab (SEC) is a fully human antibody that binds to human IL-17A and neutralizes the activity of this cytokine. That the patient has concomitant diseases, chronic hepatitis B virus infection and hepatitis C viral (HCV) infection in particular, limits the use of tumor necrosis factor- α inhibitors in the treatment of PsA [2, 3]. The paper describes a clinical case that demonstrates the successful treatment with SEC in a patient with PsA and concomitant HCV infection. In addition to the safety aspects of the use of SEC to treat chronic HCV infection, the issues on optimal dosing of the drug are discussed