Efficacy and safety of early treatment of patients with skin psoriasis and axial arthritis with IL-17 inhibitors

BACKGROUND: On average, within 7 years from the debut of skin psoriasis, patients may develop psoriatic arthritis, characterized by a chronic, relapsing progressive course. Early manifestations of psoriatic arthritis may be axial lesions presenting with inflammatory back pain. Currently, many experts are raising the topic of early prescription of genetically engineered biological drugs for axial lesions in order to prevent disability. Members of the GRAPPA expert group (Group for Research and Assessment of Psoriasis and Psoriatic Arthritis) currently do not provide specific recommendations for the treatment of axial lesions in psoriatic arthritis. The most commonly used regimens are those for axial spondyloarthritis and ankylosing spondylitis. There are also no treatment regimens for early manifestations of axial lesions in patients with smooth skin psoriasis without an established diagnosis of psoriatic arthritis. All regimens consider axial lesions in patients who have already been diagnosed with psoriatic arthritis. Thus, it is necessary to form interdisciplinary standardized protocols for the management of such patients.

AIM: to investigate the efficacy and safety of IL-17 inhibitors in axial lesions in patients with skin psoriasis.

MATERIALS AND METHODS: A prospective non-interventional comparative multicenter study was conducted in parallel groups of patients with smooth skin psoriasis (n=87). To study the effectiveness of the developed method of therapy, the formation of comparison groups is provided. 3 variants of therapy were analyzed: IL-17A inhibitors (n=21; group 1, main); methotrexate (n=35; group 2, comparison); standard desensitizing therapy was used in group 3 (n=31; control). The distribution into groups was carried out taking into account the severity, prevalence of the skin process (according to PASI, BSA), the quality of life of the patient (according to DLQI), the patient's wishes and the patient's ability to purchase genetically engineered biological drugs.

RESULTS: According to our results, the use of IL-17A inhibitors shows high efficiency: by week 52, 100% of patients reached the level of PASI 75, 90.5% ― PASI 90 and 85.7% ― PASI 100, NAPSI 100 (Nail Psoriasis Severity Index) was observed in 71.4% patients. All patients reported a reduction of pain at 12, 24 and 52 weeks with a mean BASDAI of 5.9 (SD=2.3), 4.1 (SD=1.3), and 2.7 (SD=0.9), respectively. It was found that 90.5% of patients achieved ACR 20 by the end of the study at week 52. The majority of patients (85.7%) achieved remission or low DAPSA disease activity after 24 weeks of therapy. The mean ASDAS at 12, 24, 52 weeks was 3.07 (0.9), 2.2 (1.0), and 2.3 (0.9), respectively.

CONCLUSIONS: Thus, in patients with skin psoriasis and axial lesions, it is recommended to make the earlier prescription of biologic treatment from the group of IL-17 inhibitors in order to prevent the development of severe forms of psoriatic arthritis and human disability.