1984
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Abstract: The role of changes in cytoplasmic free calcium, [Ca2+]i, in the responses to platelet-activating factor (PAF) was studied in human platelets loaded with the fluorescent calcium indicator, quin2. In the presence of 1 mM external calcium, PAF raised [Ca2+]i 8-10-fold in a few seconds to peak near 1 microM. [Ca2+]i then declined over several minutes towards the basal level. In the absence of external calcium there was a much smaller increase in [Ca2+]i of similar pattern. These findings suggest that PAF increase… Show more

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