Mutant TDP-43 deregulates AMPK activation by PP2A in ALS models.

ABSTRACT: Bioenergetic abnormalities and metabolic dysfunction occur in amyotrophic lateral sclerosis (ALS) patients and genetic mouse models. However, whether metabolic dysfunction occurs early in ALS pathophysiology linked to different ALS genes remains unclear. Here, we investigated AMP-activated protein kinase (AMPK) activation, which is a key enzyme induced by energy depletion and metabolic stress, in neuronal cells and mouse models expressing mutant superoxide dismutase 1 (SOD1) or TAR DNA binding protein 43 (TDP-43) linked to ALS. AMPK phosphorylation was sharply increased in spinal cords of transgenic SOD1G93A mice at disease onset and accumulated in cytoplasmic granules in motor neurons, but not in presymptomatic mice. AMPK phosphorylation also occurred in peripheral tissues, liver and kidn

SUBMITTER: Perera ND 

PROVIDER: S-EPMC3989332 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature