IgE-anti-IgE–mediated RANTES release from human platelets. Human platelets (1 × 10⁸/mL) were stimulated with human myeloma IgE (100 μg/mL), and/or goat antihuman IgE (300μg/mL). The levels of released RANTES were measured by ELISA. Spontaneous release was always <1% of the total RANTES content. Results are shown as mean ± SD (n = 3). * P < .01.