Anti-interleukin-5 (mepolizumab) therapy for hypereosinophilic syndromes

Jennifer K Garrett, Sean C Jameson, Blythe Thomson, Margaret H Collins, Lynne E Wagoner, Debbie K Freese, Lisa A Beck, Joshua A Boyce, Alexandra H Filipovich, Joyce M Villanueva, Steven A Sutton, Amal H Assa'ad, Marc E Rothenberg
Journal of Allergy and Clinical Immunology 2004, 113 (1): 115-9

BACKGROUND: IL-5 is a cytokine critically involved in regulating several aspects of eosinophils including their production, activation, and tissue recruitment. As such, IL-5 may be involved in the pathogenesis of hypereosinophilic syndromes, a group of poorly treated diverse disorders characterized by sustained peripheral blood and/or tissue eosinophilia.

OBJECTIVE: We aimed to assess the safety and efficacy of a humanized blocking monoclonal antibody against IL-5 (mepolizumab) in patients with several forms of hyper-eosinophilic syndromes.

METHODS: We performed an open-label trial of anti-IL-5 in which 3 intravenous doses (10 mg/kg, maximum 750 mg) were administered at 4-week intervals to 4 patients with hypereosinophilic syndromes (defined by peripheral blood and/or tissue eosinophilia). The effects of treatment on safety, eosinophil levels (in peripheral blood and/or diseased tissue), pulmonary function, and quality of life were measured over a 28-week period.

RESULTS: Anti-IL-5 was well tolerated in all patients and lowered peripheral blood eosinophil counts despite ongoing systemic glucocorticoid therapy. The decline in circulating eosinophil counts was sustained for at least 12 weeks after the last dose of anti-IL-5. In addition, anti-IL-5 improved clinical and quality of life measurements. In one patient with striking tissue eosinophilia (eosinophilic esophagitis), anti-IL-5 resulted in a 10-fold reduction in tissue eosinophil levels.

CONCLUSIONS: These results suggest that anti-IL-5 is safe, effective in lowering eosinophil levels, and has potential glucocorticoid-sparing effects in patients with a variety of hyper-eosinophilic syndromes. As such, anti-IL-5 may have significant therapeutic potential for hypereosinophilic syndromes.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Trending Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"