Neuronal overexpression of hTDP-43 in Caenorhabditis elegans impairs different neuronally controlled behaviors anddecreases fecundity.

Cytoplasmic inclusions consisting of transactive response DNA-binding protein 43 (TDP-43) are a key hallmark of TDP-43 proteinopathies like amyotrophic lateral sclerosis (ALS). Caenorhabditis elegans is considered a useful model for studying the molecular mechanisms underlying TDP-43 toxicity in vivo . Here, we assessed different neuronal systems through established behavioral assays and extended the phenotypic characterisation of a C. elegans model expressing wildtype human TDP-43 ( hTDP-43 ) pan-neuronally. Our data show that neuronal expression of hTDP-43 in C. elegans disrupts chemotaxis and decreases fecundity. The basal slowing response, on the other hand, appears to be preserved in the presence of hTDP-43.