Impact of biologicals on chronic rhinosinusitis with nasal polyps in combination with severe asthma

Chronic rhinosinusitis with nasal polyps (CRSwNP) is often associated with asthma. This combination aggravates the course of both conditions, including the frequency and severity of asthma and CRSwNP exacerbations. Currently, the main strategy in the treatment of severe asthma is the use of biologicals, which may also impact CRSwNP symptoms, considering the similarity of pathogenic mechanisms of these diseases. The aim of our study was to evaluate the impact of biological therapy on CRSwNP in combination with severe asthma. Methods. 49 patients with CRSwNP and severe asthma were included in a single-center prospective cohort study. Patients were divided into 4 groups: dupilumab ( n = 20), benralizumab ( n = 15), mepolizumab ( n = 7), and omalizumab ( n = 7). Patients received the biologicals for at least 12 months ( min – 12.0 months; max – 52.2 months). Asthma control (ACT, FEV 1 , the number of asthma exacerbations) and CRSwNP control (SNOT-22, the number of nasal and sinus surgeries) were evaluated at baseline and during treatment. The safety of therapy was assessed by the examination results and the reported adverse events. Results. We observed statistically significant improvements in asthma control, respiratory function, and a decrease in the number of asthma exacerbations with the use of biologicals in all groups. However, there were no statistically significant differences between the groups ( p > 0.05). As for CRSwNP, we found the statistically significant improvements in symptoms (ΔSNOT-22 – (–67,3) ± 23,7, p < 0,001; (–26,1) ± 24,6, p < 0,001; (–34,0) ± 23,5, p = 0,016; (–35,1) ± 25,1, p = 0,025) and a decrease in the number of surgeries after therapy (Δ number of surgeries – (–5,2) ± 8,6, p < 0,001; (–3,7) ± 3,3, p = 0,002; (–3,6) ± 2,4, p = 0,036; (–1,6) ± 1,4, p = 0,010). in all groups. At the same time, dupilumab showed a greater improvement of CRSwNP control according to the SNOT-22 questionnaire than benralizumab (p = 0.001) and mepolizumab (p = 0.034). Conclusion. Biologicals currently used to treat severe asthma have a beneficial effect on concomitant CRSwNP. However, not all biologicals are characterized by an effect on the processes of polyposis tissue remodeling and formation. Our study confirms the relevance of searching for other potential targets for the development of the new biologicals to address the identified clinical needs.