Abstract
Background: Treatment of hypereosinophilic syndrome (HES) often requires the use of immunomodulators with substantial side effect profiles. The emergence of biologics offers an alternative treatment modality. Objective: To examine real-world practice data to describe the safety and consequences of various biologics suspected to directly or indirectly affect eosinophilic inflammation for the treatment of HES. Methods: Retrospective data from 13 centers were collected via an online Research Electronic Data Capture repository. Inclusion criteria included (1) peripheral eosinophil count of 1,500/mm3 or greater without a secondary cause; (2) clinical manifestations attributable to the eosinophilia; and (3) having received mepolizumab (anti-IL-5), benralizumab (afucosylated anti-IL-5 receptor α), omalizumab (anti-IgE), alemtuzumab (anti-CD52), dupilumab (anti-IL-4 receptor α), or reslizumab (anti-IL-5) outside a placebo-controlled clinical trial. Results: Of the 151 courses of biologics prescribed for 121 patients with HES, 59% resulted in improved HES symptoms and 77% enabled tapering of other HES medications. Overall, 105 patients were receiving daily systemic glucocorticoids at the time of a biologic initiation and were able to reduce the glucocorticoid dose by a median reduction of 10 mg of daily prednisone equivalents. Biologics were generally safe and well-tolerated other than infusion reactions with alemtuzumab. Thirteen of 24 patients had clinical improvement after switching biologics and nine patients responded to increasing the dose of mepolizumab after a lack of response to a lower dose. Conclusions: Biologics may offer a safer treatment alternative to existing therapies for HES, although the optimal dosing and choice for each subtype of HES remain to be determined. Limitations of this study include its retrospective nature and intersite differences in data collection and availability of each biologic.
Original language | English (US) |
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Pages (from-to) | 1217-1228.e3 |
Journal | Journal of Allergy and Clinical Immunology: In Practice |
Volume | 10 |
Issue number | 5 |
DOIs | |
State | Published - May 2022 |
Funding
This research was supported in part by the Intramural Research Program of the National Institute of Health, by National Institute of Health Grant T32AI083216 (to M.M. Chen), and by the Belgian National Fund for Scientific Research Grants F 5/4/150/5 and FC 54372 (to F. Roufosse). This research was supported in part by the Intramural Research Program of the National Institute of Health, by National Institute of Health Grant T32AI083216 (to M.M. Chen), and by the Belgian National Fund for Scientific Research Grants F 5/4/150/5 and FC 54372 (to F. Roufosse). Conflicts of interest: S.R. Durrani has received consulting fees from Allakos and Regeneron; and clinical trial support from Allakos, AstraZeneca, and Regeneron. F. Roufosse has received consulting fee from GlaxoSmithKline and AstraZeneca and royalties from UpToDate. P. Akuthota has received grants from the National Institutes of Health and the American Partnership for Eosinophilic Disorders, grants and consulting fees from GlaxoSmithKline and AstraZeneca, grants from Regeneron, consulting fees from Sanofi, and royalties from UpToDate. M.E. Rothenberg is a consultant for Pulm One, Spoon Guru, ClostraBio, Serpin Pharm, Allakos, Celldex, Nextstone One, Bristol Myers Squibb, Astra Zeneca, Ellodi Pharma, GlaxoSmith Kline, Regeneron/Sanofi, Revolo Biotherapeutics, and Guidepoint and has an equity interest in the first seven listed, and royalties from reslizumab (Teva Pharmaceuticals), PEESSv2 (Mapi Research Trust) and UpToDate. M.E.R. is an inventor of patents owned by Cincinnati Children's Hospital.B.S. Bochner receives remuneration for serving on the scientific advisory board of Allakos, Inc. and owns stock in Allakos. He receives publication-related royalty payments from Elsevier and UpToDate. He is a co-inventor on existing Siglec-8?related patents and thus may be entitled to a share of royalties received by Johns Hopkins University during development and potential sales of such products. The rest of the authors declare that they have no relevant conflicts of interest.
Keywords
- Biologic
- Eosinophil
- Eosinophilic granulomatosis with polyangiitis
- Hypereosinophilic syndrome
ASJC Scopus subject areas
- Immunology and Allergy