Stage 24 retinal growth cones were stimulated with netrin-1 for 5 minutes, stained for β-actin and fluorescence intensities were measured. Netrin-1induced an increase in β-actin QIF signal, which was blocked by CHX and β-actin AMO (a-g). *** P < 0.0001, Kruskal-Wallis test. Growth cones from β-actin AMO injected retina showed reduced β-actin QIF signal (e,g), which was not affected by netrin-1 stimulation (f,g). * P = 0.02, ns = non-significant, Mann-Whitney test. Enolase QIF signal was not affected by netrin-1 stimulation (h,i). Schematic diagram of Kaede construct and experimental design (j). Time-lapse imaging showed that only Kaede-green was detected before photoconversion (l,r). At T = 0 min, Kaede was photoconverted and only Kaede-red was detected (p,v). Netrin-1 had no effect on Kaede-green (l-n) or Kaede-red signals (o-q) in growth cones expressing Kaede-Δ3’UTR (k). However, netrin-1 induced a recovery of Kaede-green in both intact and severed growth cones expressing Kaede-β actin 3’UTR (k,s,t), which was blocked by CHX (k). The recovery was also seen in some filopodia (t, boxed area and inset). The exposure gain for inset picture is increased for visualization of filopodia. Kaede-red remained unchanged (v,w). The change in Kaede-green signal (ΔF) was compared to the image taken at T = 0 min (F0) and presented as ΔF/F0. * P < 0.05, ** P < 0.01, Mann-Whitney test. Scale bars 5 μm. Error bars s.e.m. Numbers inside bars indicate the number of growth cones analyzed.