Jw. Russell et al., EFFECT OF CISPLATIN AND ACTH(4-9) ON NEURAL TRANSPORT IN CISPLATIN-INDUCED NEUROTOXICITY, Brain research, 676(2), 1995, pp. 258-267
Cisplatin causes a dose limiting peripheral neuropathy, however, the b
iological mechanism by which this occurs is unknown. Murine N1E.115 ne
uroblastoma cells and neural crest derived pigment cells have similar
transport mechanisms to human neural cells and were used to study the
effect of cisplatin on cellular transport. Cisplatin reduced both the
number and velocity of organelles moving in the anterograde and retrog
rade direction, compared to control cells. Cisplatin induced inhibitio
n of transport was prevented by the simultaneous administration of ACT
H(4-9). This analog alone had no effect on N1E.115 organelle, or eryth
rophore granule, movement. In both N1E.115 and pigment cells cisplatin
inhibited transport within 1 h of exposure to the drug. The degree of
inhibition did not increase significantly if pigment cells were incub
ated in cisplatin for 48 h compared to acute exposure. Microtubules in
both pigment cells and N1E.115 neurites retained their structural int
egrity suggesting that factors other than changes in gross microtubule
morphology are responsible for cisplatin neurotoxicity. Cisplatin red
uces N1E.115 neurite growth after 48 h incubation but this can be prev
ented by simultaneous use of ACTH(4-9). This study demonstrates for th
e first time that cisplatin and ACTH(4-9) affect fast axonal transport
by specific mechanisms which appear related to their observed neuroto
xic and neuroprotective roles, respectively.