Effect of nonhydrolyzable guanosine phosphate on IgE-mediated activation of phospholipase C and histamine release from rodent mast cells.

Abstract

Rat mast cells and bone marrow-derived mouse mast cells (BMMC) were sensitized with mouse IgE mAb, and permeabilized by ATP to introduce guanosine-5'-O-(3-thiotriphosphate) (GTP gamma S) and/or guanosine-5'-O-(2-thiodiphosphate) (GDP beta S) into the cells. After ATP-induced lesions were resealed with Mg2+, the cells were challenged by Ag to determine the… (More)

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