Abstract:
Purpose of the study. To study the relationship between the serum level of interleukin-4 (IL-4) and
visceral pathology, the nature of the course and clinical forms of SS. Materials and methods. IL-4 was determined in
the sera of 60 patients with SS by indirect enzyme-linked immunosorbent assay. Results. The level of IL-4 in the
range of 10-1000 pg/ml was detected in 18 out of 60 patients with SS (30%). Distinctive features of this group of
patients were a shorter duration of the disease, progression of skin fibrosis and visceral pathology by the time of the
examination, and a tendency towards a higher incidence of pulmonary fibrosis. Significant differences in the damage
to other internal organs, as well as the dependence of the content of IL-4 on the clinical forms and course of the
disease, were not revealed. In patients with an increase in IL-4 in the blood, higher levels of CIC, γ-globulins were
noted, while the content of acute phase reactants was lower than in the rest of the group. Output. The established
relationship between the serum level of IL-4 and the activity of the fibrous process in SS requires confirmation in
prospective studies.
