Here, the authors discuss how cytokines could be used as therapeutic targets for individuals with asthma that is inadequately controlled using current therapies. They also highlight the need for phenotyping asthma subtypes in order to achieve the best possible patient-focused treatment. Recent advances in the knowledge of asthma pathobiology suggest that biological therapies that target cytokines can be potentially useful for the treatment of this complex and heterogeneous airway disease. The use of biologics in asthma has been established with the approval of the humanized monoclonal immunoglobulin E-targeted antibody omalizumab (Xolair; Genentech/Novartis) as an add-on treatment for inadequately controlled disease. Furthermore, evidence is accumulating in support of the efficacy of other biologics, such as interleukin-5 (IL-5)- and IL-13-specific drugs. Therefore, these new developments are changing the scenario of asthma therapies, especially with regard to more severe disease. The variability among patients' individual therapeutic responses highlights that it will be necessary to characterize the different asthma subtypes so that phenotype-targeted treatments based on the use of biologics can be implemented.

The potential of biologics for the treatment of asthma

The eXpeRience registry: the 'real-world' effectiveness of omalizumab in allergic asthma.

Omalizumab has been shown to reduce exacerbation rates in moderate to severe allergic asthma. Our aim was to evaluate omalizumab efficacy and safety in a real-life setting in severe asthmatic children. 104 children (aged 6-18 years), followed up in paediatric pulmonary tertiary care centres, were included at the beginning of omalizumab treatment. Asthma control levels, exacerbations, inhaled corticosteroid dose, lung function and adverse events were evaluated over 1 year. Children were characterised by allergic sensitisation to three or more allergens (66%), high IgE levels (mean 1125 kU · L(-1)), high rate of exacerbations (4.4 per year) and healthcare use during the previous year, and high inhaled corticosteroid dose (mean 703 μg equivalent fluticasone per day). Asthma control levels defined as good, partial or poor, improved from 0%, 18% and 82% at entry to 53%, 30% and 17% at week 20, and to 67%, 25% and 8% at week 52, respectively (p<0.0001). Exacerbation and hospitalisation rates dropped by 72% and 88.5%, respectively. At 12 months, forced expiratory volume in 1 s improved by 4.9% (p=0.023), and inhaled corticosteroid dose decreased by 30% (p<0.001). Six patients stopped omalizumab for related significant adverse events. Omalizumab improved asthma control in children with severe allergic asthma and was generally well tolerated. The observed benefit was greater than that reported in clinical trials.

https://erj.ersjournals.com/content/erj/42/5/1224.full.pdf

Add-on omalizumab in children with severe allergic asthma: a 1-year real life survey

Omalizumab was the first, and for a long time the only available monoclonal antibody for the add-on treatment of severe allergic asthma. In particular, omalizumab selectively targets human immunogl...

https://journals.sagepub.com/doi/pdf/10.1177/1753466618810192

Omalizumab, the first available antibody for biological treatment of severe asthma: more than a decade of real-life effectiveness.

We reviewed 24 'real-life' effectiveness studies of omalizumab in the treatment of severe allergic asthma that included 4117 unique patients from 32 countries with significant heterogeneity in patients, clinicians and settings. The evidence underscores the short- and long-term benefit of anti-IgE therapy in terms of the following: improving lung function; achieving asthma control and reducing symptomatology, severe exacerbations and associated work/school days lost; reducing healthcare resource utilizations, in particular hospitalizations, hospital lengths of stay and accident specialist or emergency department visits; reducing or discontinuing other asthma medications; and improving quality of life - thus confirming, complementing and extending evidence from randomized trials. Thus, omalizumab therapy is associated with signal improvements across the full objective and subjective burden of illness chain of severe allergic asthma. Benefits of omalizumab may extend up to 2-4 years, and the majority of omalizumab-treated patients may benefit for many years. Omalizumab has positive short- and long-term safety profiles similar to what is known from randomized clinical trials. Initiated patients should be monitored for treatment response at 16 weeks. Those showing positive response at that time are highly likely to show sustained treatment response and benefit in terms of clinical, quality of life and health resource utilization outcomes.

https://onlinelibrary.wiley.com/doi/pdf/10.1111/all.12815

'Real-life' effectiveness studies of omalizumab in adult patients with severe allergic asthma: systematic review

Italian real-life experience of omalizumab

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Italian real-life experience of omalizumab