Acrylamide and 2,5-hexanedione neuropathies: abnormal bidirectional transport rate in distal axons.

Events taking place in the distal axon including delivery, turn-around and return of labelled materials toward the cell body were examined in 2,5-hexanedione (2,5-HD) and acrylamide-induced neuropathies. Retrograde transport profiles obtained from 2,5-HD as well as acrylamide intoxicated axons demonstrated a delay in the time of onset of accumulation and a decrease in the amount of returning activity to the distal collection segment. Integral analysis of the data indicated a decrease in bidirectional transport rate within the distal axons rather than a failure in the turn-around process at the nerve terminal.