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Double-blind placebo-controlled trial of the effect of omalizumab on basophils in chronic urticaria patients.

Lukas JoergT Pecaric-PetkovicS ReichenbachM CoslovskyO StalderW PichlerO Hausmann
Published in: Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology (2017)
We demonstrated a rapid reduction of FcεRI receptor density on basophils following treatment with omalizumab. Because CU-BAT using well-characterized, omalizumab-naïve donor basophils did not change during the treatment phase, autoreactive serum factors seem to remain unaltered. This points towards a cellular effect of omalizumab on basophils. To predict the omalizumab response time and to monitor disease, FcεRI density and CU-BAT might be promising cellular-based assays.
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