Distribution of Mitochondria is Connected to Function in Aging Neurons
Drosophila studies show that loss of axonal mitochondria disrupts autophagy and proteostasis, producing neuronal dysfunction. Proteomics revealed mitochondrial depletion elevates eIF2β, lowers eIF2α phosphorylation and global translation; eIF2β overexpression mimicked, and its reduction rescued, autophagic and functional defects, implicating a mitochondria–eIF2β axis in age-related neurodegeneration.
Why it mattersEvidence that the mitochondria–eIF2β axis drives axonal proteostasis suggests prioritizing therapies targeting eIF2β for neurodegeneration trials.