Possible involvement of microfilaments in protein kinase C translocation

Biochemical and Biophysical Research Communications
M ItoS Shigeta

Abstract

We investigated the role of microfilaments in stimulus-induced translocation of protein kinase C (PKC) in polymorphonuclear leukocytes (PMNs) from C57BL/6 mice. Cytochalasin B and dihydrocytochalasin B almost completely inhibited PKC translocation induced by either TPA or Ca2+ ionophore after pretreatment of cells for 30 min. In addition, ML-9, a potent inhibitor of Ca2+/calmodulin-dependent myosin light chain kinase which regulate microfilament contraction, and a calmodulin antagonist W-7, also inhibited PKC translocation. These findings suggest the possibility that microfilaments are involved in the translocation of PKC.

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Jan 24, 1998·Biochemical and Biophysical Research Communications·F TanabeM Ito
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