Abstract

RATIONALE: An IgE-mediated allergic response requires allergen-specific B-cell differentiation into IgE-producing plasma cells. We created XmAb7195, an omalizumab (Xolair) -related anti-IgE antibody Fc engineered for high affinity to human FcγRIIb, to coengage IgE-BCR and FcγRIIb and prevent activation and terminal differentiation of IgE+ B cells. Our hypothesis is that XmAb7195 will not only sequester free IgE, but will suppress its production and reduce total IgE.

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