[Ca²⁺]_i increase induces actin polymerization in PBL.

<p>PBL were treated for 15 minutes with latrunculin B (50 nM, 100 nM or 500 nM) or with ionomycin (0.5 µg/ml, 1 µg/ml, 2.5 µg/ml). F-actin cellular content was measured by FACS analysis. Data are from one representative experiment out of three. In parallel experiments the vehicle of the drugs (DMSO) did not affect actin polymerization.