Abstract
In multicellular organisms, neurons integrate a diverse array of external cues to affect downstream changes in organismal health. Specifically, activation of the endoplasmic reticulum (ER) unfolded protein response (UPRER) in neurons increases lifespan by preventing age-onset loss of ER proteostasis and driving lipid depletion in a cell non-autonomous manner. The mechanism of this communication is dependent on release of small clear vesicles from neurons. We find dopaminergic neurons are necessary and sufficient for activation of cell non-autonomous UPRER to drive lipid depletion in peripheral tissues, while serotonergic neurons are necessary and sufficient to drive protein homeostasis in peripheral tissues. These signaling modalities are unique and independent, and together coordinate the benefits of neuronal cell non-autonomous ER stress signaling upon health and longevity.
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