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Home All Specialties Chronic Disease

Tezepelumab reduced annual exacerbation rates in patients with severe asthma

byBoaz WongandHarsh Shah
June 2, 2021
in Chronic Disease, Pediatrics, Pulmonology
Reading Time: 2 mins read
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1. Subcutaneous tezepelumab treatment reduced the rate of annual asthma exacerbations in patients with severe asthma compared to the placebo group.

2. No significant differences in adverse events were found between the treatment and control groups.

Evidence Rating Level: 1 (Excellent)

Study Rundown: In patients with severe asthma, thymic stromal lymphopoietin (TSLP) is a cytokine that exacerbates airway obstruction and increases airway inflammation. The cytokine can be blocked with the monoclonal antibody called tezepelumab. As such this trial investigated the efficacy of tezepelumab to reduce the annual rate of asthma exacerbations. The study determined tezepelumab treatment significantly reduced the annual rate of asthma exacerbations compared to the placebo treatment. Additionally, tezepelumab improved prebronchodilator 1-second forced expiratory volume (FEV1). No differences were found between both groups for the proportions of patients reporting adverse events. The most common reported adverse event was upper respiratory tract infection. The study was limited by the strict inclusion criteria and the small number of adolescent patients included in the study. Nonetheless, the findings are significant as the study provided evidence for the potential benefit of tezepelumab in severe asthma over multiple measures from exacerbation rates to lung function.

Click to read the study in NEJM

Relevant Reading: Tezepelumab as an Emerging Therapeutic Option for the Treatment of Severe Asthma: Evidence to Date

In-Depth [randomized controlled trial]: This randomized control trial across 297 sites in 18 countries enrolled 1,061 patients between the ages of 12 and 80 with severe asthma. The inclusion criteria for this study included patients with diagnosed severe asthma for at least 12 months, a FEV1 of less than 80% of its predicted value, and a minimum of two asthma exacerbations required hospitalization. Patients who were smokers were excluded from the study. The patients were randomized in a 1:1 ratio to receive tezepelumab or placebo, respectively, every four weeks for 52 weeks. The primary outcome was the annual asthma exacerbations rate. The study determined that the annual asthma exacerbation rate was reduced to 0.93 (95% confidence interval [CI], 0.80 to 1.07) in the treatment group compared to 2.10 (95% CI, 1.84 to 2.39) in the placebo group (rate ratio, 0.44; 95% CI, 0.37 to 0.53; P<0.0001). Furthermore, patients receiving tezepelumab (0.23 liters) showed improvement in the prebronchodilator FEV1 compared to the placebo group (0.09 liters) (difference, 0.13 liters; 95% CI, 0.08 to 0.18; P<0.001). Similar proportions of patients in both groups experienced adverse events with the most common events being nasopharyngitis, headache, and upper respiratory tract infections. Together, this study demonstrated the benefit of tezepelumab in improving symptom control and quality of life for patients with severe asthma.

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Tags: asthmaasthma exacerbationlung functionTezepelumab
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