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Newer Biological Agents in the Treatment of Severe Asthma: Real-World Results from a Tertiary Referral Center

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Abstract

Purpose

To determine the efficacy of IL-5 inhibitory therapy in severe, refractory asthma in a real-world clinical setting from a tertiary referral center.

Methods

A retrospective chart review of patients with severe asthma treated with IL-5 biologic therapy for ≥ 6 months at Mayo Clinic in Rochester, Minnesota between January 1, 2013 and August 31, 2019.

Results

Over the study period, we identified 63 patients with a mean age of 54 who received an IL-5 inhibitor for ≥ 6 months. A total of 55 patients received mepolizumab, 2 received benralizumab, and 9 patients received both. Patients were followed up for a mean of 25 months. The mean number of months of oral prednisone use prior to biologic initiation was 64. There was a significant reduction in the median dose of prednisone in the 24 months after drug initiation (15 mg vs. 0 mg; p = < 0.0001). Similarly; there was a significant decline in the median number of asthma exacerbations in the 24 months before and after drug initiation (7 vs. 2; p = < 0.0001). The mean number of emergency room (ER) visits and hospitalizations decreased from 5.1 and 2.0 to 1.6 and 0.4 in the 24 months before and after therapy initiation (p < 0.0001 and p = 0.007, respectively)

Conclusions

IL-5 inhibitory therapy is associated with significant and long-term sustained reductions in asthma exacerbation frequency, ER visits, hospitalizations, as well as oral steroid usage in a patient population with refractory steroid-dependent asthma referred to a tertiary referral center.

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Abbreviations

FeNO:

Fractional excretion of exhaled nitric oxide

ED:

Emergency department

FEV1:

Forced expiratory volume in 1 s

FVC:

Forced vital capacity

IgE:

Immunoglobulin E

IL-5:

Interleukin 5

IL-4:

Interleukin 4

IL-13:

Interleukin 13

RCT:

Randomized control trial

SD:

Standard deviation

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Correspondence to Dayne Voelker.

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Conflict of interest

Karina Keogh-pharmaceutical drug trial site invest, relationship with GSK. Monograph relationship with BMJ. No other conflicts of interest to report.

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Voelker, D., Almodallal, Y., Scrodin, M.D. et al. Newer Biological Agents in the Treatment of Severe Asthma: Real-World Results from a Tertiary Referral Center. Lung 198, 653–659 (2020). https://doi.org/10.1007/s00408-020-00369-8

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  • DOI: https://doi.org/10.1007/s00408-020-00369-8

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