Reduced insulin-like signaling restores motor and chemosensory neuron function in C. elegans expressing TDP-43, an ALS-associated protein.

Abstract

TAR DNA-binding Protein 43 (TDP-43) is linked to the pathology of neurodegenerative diseases. We used the roundworm Caenorhabditis elegans to examine the neurotoxic impact of the pan-neuronal expression of wild-type human TDP-43 (hTDP-43) fused to a yellow fluorescent protein. Using the daf-2 ( e1370 ) mutant allele, we sought to determine whether activating cellular stress responses in the insulin-like signaling (ILS) pathway could restore neuronal function in hTDP-43 expressing C. elegans . Using well characterized behavioral assays, our data show that manipulating the ILS pathway significantly improves functionality of motor and chemosensory neurons in animals expressing hTDP-43.