PMN were treated with 1 µM PPP (blue) or 50 ng/ml IGF1 (green) for 30 min before assessing axonal transport using 30 nM AlexaFluor555-HcT. Example images of DIV6 PMN treated with 1 µM PPP or 50 ng/ml IGF1. PMN were stained with 30 nM AlexaFluor555-HcT. The scale bar is 50 µm. 