Abstract
The accumulation of inositol phosphates in myo-[3H]inositol-labelled human neutrophils stimulated with the chemotactic peptide fMet-Leu-Phe was measured. The challenge with the chemotactic peptide caused the generation of inositol monophosphate (InsP), inositol bisphosphate (InsP2) and inositol trisphosphate (InsP3). The formation of the three inositol phosphates followed a differential time course: InsP3 accumulated very rapidly and transiently, whereas InsP increased steadily for more than 2 min. Inositol phosphate formation was only partially decreased by procedures which prevented the fMet-Leu-Phe-dependent increase of cytosolic free Ca2+ concentration.
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