LTD4-induced actin polymerization in CD34⁺progenitors and KG1a cells.

Polymerization of cellular actin was assessed by flow cytometry using FITC-conjugated phalloidin. In both CD34⁺ and KG1a cells, an increase (40%) of polymerized F-actin was observed after addition of 1 μM LTD4; the level of F-actin returned back to the baseline level within 2 minutes. Control, ●; LTD4, ⋄.