Model for studying Clostridium botulinum neurotoxin using differentiated motor neuron-like NG108-15 cells.

Regina C M Whitemarsh, Christina L Pier, William H Tepp, Sabine Pellett, Eric A Johnson

Index: Biochem. Biophys. Res. Commun. 427(2) , 426-30, (2012)

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Abstract

Cancerous cell lines have traditionally shown low sensitivity to laboratory or pharmaceutical preparations of botulinum neurotoxin. The work presented here demonstrates that the mouse neuroblastoma/rat glioma hybrid cell line NG108-15 is capable of more sensitively detecting BoNT/A1 than any cell line previously described. This cell line has previously been described to have motor neuron like characteristics, therefore making it a good model to study BoNTs. Differentiation of NG108-15 cells in serum-free medium containing retinoic acid and purmorphamine dramatically increased sensitivity of the neurons to BoNT/A (EC(50) = ~16 LD(50) U). Additional pre-treatment with triasialoganglioside GT1B prior to toxin exposure reduced the EC(50) further to ~11 LD(50) U. Co-culture of the neurons with C2C12 myotubes also significantly increased BoNT/A sensitivity of NG108-15 cells (EC(50) = 26 U) in the absence of differentiation factors.Copyright © 2012 Elsevier Inc. All rights reserved.