We investigated roles of protein kinase C (PKC) and Ca2+/calmodulin- dependent protein II (CAM II) kinase activities in the maintenance of axonal transport in cultured isolated mouse dorsal root ganglion (DRG) cells. Video- enhanced microscopic recordings revealed that the PKC inhibitor chelerythrine (1 μM) reduced anterograde and retrograde axonal transport, while the CAM II kinase inhibitor KN-62 (10 μM) had no effect. Morphological observation showed that neurite growth was prevented by the presence of chelerythrine (1 μM). From these results, we conclude that PKC activity is required to maintain axonal transport and thereby neurite growth.
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