PMN were treated with 50 ng/ml IGF1 (green) for 30 min before assessing axonal transport using 30 nM AlexaFluor555-HcT. Speed distribution profile of IGF1-treated neurons and controls. IGF1 caused a decrease in instantaneous velocities of HcT-containing organelles compared to controls (N=3 independent experiments , data shown are mean ± SEM). 